This document discusses DNA sequencing and next generation sequencing (NGS) technologies. It provides background on DNA sequencing, noting that it determines the exact order of nucleotides within a DNA molecule. Next, it introduces Frederick Sanger as the "Father of DNA Sequencing." Finally, it discusses how NGS has revolutionized genomic research by allowing entire human genomes to be sequenced in a single day and its various applications in clinical genetics and other fields.
Day 2: Intro to CLIMB at the MRC Unit, GambiaBen Pascoe
This document introduces the nullarbor bioinformatics tool. It provides instructions on running nullarbor using test Campylobacter dataset isolates. The summary shows that nullarbor performs analysis including assembly, annotation, variant calling and phylogenetic trees on microbial sequencing data from multiple isolates. It finds one of the four test isolates was contaminated and another was passaged through a chicken based on differences observed in the nullarbor output.
Vaccines based on messenger RNA (mRNA) have attracted worldwide attention as Pfizer and Moderna vaccines have been authorized for emergency use by the U.S. Food and Drug Administration (FDA) and similar agencies around the world. This is the first time an mRNA-based vaccine has been approved for use in healthy people, marking an important milestone in the achievements of science and public health.
Reverse engineering the human body and biology can help save lives by deciphering protein interactions and developing causal networks to understand disease pathways. Machine learning can combine data from over 50 databases on drugs, proteins, clinical trials, and more to generate networks that model human physiology and predict drug responses, biomarkers, and adverse events. This system has already helped develop new treatments and biomarkers while aiding pharmaceutical companies, and its continued use promises more personalized medicine tailored to individual pathologies and biology in the future.
This document discusses using plant viruses for nanotechnology and nanomedicine applications. It begins by defining nanotechnology and the nanoscale. It then discusses using plant viral nanoparticles and structures like CPMV and TMV in nanobiotechnology. Methods of synthesizing, functionalizing, and encapsulating cargos within viral nanoparticles are presented. Examples of using viral nanoparticles for vaccine production against diseases like hepatitis, influenza, and papillomavirus are provided. The document concludes by discussing the scope and potential challenges of using nanotechnology for plant disease management.
This slide will help you understand the basics of CRISPR-Cas9, Mechanism, Application, Advantages, and Disadvantages of CRISPR-Cas9, Future Concerns, Future Possibilities.
Bionanotechnology utilizes biological systems optimized through evolution like cells, proteins, and nucleic acids to create functional nanostructures made of organic and inorganic materials. It combines nanotechnology and biotechnology, originally designed to manipulate nanostructures for basic and applied biological studies. Recombinant DNA technology is central to bionanotechnology as it allows for mutation, recombination, and sequencing of genes. Monoclonal antibodies are identical antibodies cloned from a single parent cell that can be targeted as "magic bullets" against diseases. Nanowires are promising for new biosensor platforms due to properties like size, aspect ratio, and ability to exploit electrical sensing.
Naked mRNA Vaccines
mRNA vaccines can be delivered without any additional carriers, that is, in a naked
format. In this method, mRNA is dissolved in buffer and then injected directly.
https://www.creative-biolabs.com/vaccine/mrna-pharmacology-optimization-platform.htm
A method of DNA repair called Break-induced Replication (BIR) is more likely to cause genetic mutations than normal DNA synthesis, being up to 2,800 times more mutagenic. BIR occurs when a broken DNA piece invades another chromosome during replication, which happens in the wrong place and time, losing accuracy. There are several changes to the replication machinery that make BIR highly mutagenic. Neutron scattering experiments provide information about how DNA strands separate at different temperatures during denaturation, observing the first stage of separation before the strands become disordered. Understanding DNA repair mechanisms and structure allows for medical advances in addressing genetic diseases and conditions like cancer.
PCR (polymerase chain reaction) is a technique for amplifying a specific region of DNA through repeated cycles of heating and cooling in the presence of DNA polymerase. It allows for the rapid production of multiple copies of DNA from a small initial sample. Key components include a DNA template, primers that bind to the DNA region to be amplified, DNA polymerase, and buffers. During each cycle, the DNA is denatured by heating, the primers anneal to the single strands, and the polymerase extends the primers to make a new copy of the DNA region. Repeating this process results in exponential amplification of the target DNA sequence.
Researchers have found 14 genes in bedbugs that are causing resistance to common insecticides. These genes cause biological changes like thicker skin that prevents poisons from penetrating and mutations that stop toxins from affecting the nervous system. The findings could help scientists develop new insecticides, but for now exterminators have to use more manual tactics as chemicals are losing their effectiveness against the resurgent bedbug populations.
This document discusses creating a transgenic Caenorhabditis elegans model to better understand prion disease by introducing a murine prion protein gene. Researchers will validate the expression and localization of the prion protein in the transgenic worms. They will then infect the worms with toxic prion proteins to study how the toxic forms propagate by converting the normal prion protein and to analyze the effects on worm health, longevity, and robustness. This transgenic worm model will allow discoveries about prion propagation and stress responses related to prion protein misfolding in prion disease.
Mechanism of Action of mRNA Based Vaccine
1. mRNA encapsulated in the delivery vehicle is taken up by APC cell.
2. Delivery vehicle is digested, and mRNA released.
3. mRNA is translated by the host’s ribosome and antigen is formed.
4. After the antigen is formed, it can be processed through different pathways.
https://www.creative-biolabs.com/vaccine/mrna-vaccine-platform.htm
DNA origami uses DNA strands to create complex 3D structures and has applications in drug delivery, nanotechnology, microscopy, and computing. It was initially conceived in the 1980s and refined by Paul Rothemund at Caltech using the M13 phage genome, allowing a wider range of shapes. Structures can be engineered to deliver drugs like doxorubicin to cancer cells and edit genomes with CRISPR-Cas9, demonstrating uses in areas like healthcare, materials science, and molecular computing.
Biolistics, also known as gene gun technology or particle bombardment, is a physical method of genetically transforming cells. It involves coating DNA onto microprojectiles and accelerating them into target cells using a gene gun. The gene gun was originally developed in the 1980s by modifying an air pistol to fire tungsten or gold particles coated with DNA. When the particles pass through the cell wall and release the DNA in the cytoplasm, the cells become transformed. Biolistics has been used successfully to transform various plants and has also been used to deliver DNA vaccines and label cell subsets. It provides advantages over other transformation methods but also has limitations such as random integration and associated cell damage.
Biolistics, also known as gene gun technology or particle bombardment, is a physical method of DNA transfer where microprojectiles coated with DNA are accelerated into intact plant or animal cells. A gene gun works by firing microscopic gold or tungsten particles coated with DNA through a stopping screen and into target cells. Some DNA-coated particles pass through the cell wall and cytoplasm, dissociating from the particle inside the cell where the DNA may be expressed. Gene gun technology has been used successfully to transform many plant species as well as deliver DNA vaccines and label cell subsets for research.
Lecture 5 and 6 microbial_sem_6_20180307Ashfaq Ahmad
The document discusses the CRISPR-Cas9 system and its use as a genome editing tool. It provides background on the discovery of CRISPRs in bacteria and archaea. It describes the mechanism of CRISPR-Cas9 resistance, including adaptation, expression and interference stages. It discusses the components of CRISPR-Cas9 including the guide RNA and Cas9 nuclease domains. It also covers the protospacer adjacent motif (PAM) sequence, DNA repair pathways used, applications of nickase systems and multiplex genome engineering with CRISPR.
CRISPR is a new gene editing technology based on the bacterial immune system. It allows genetic engineering to be done at a fraction of the previous cost by using a bacterial enzyme called Cas9. Cas9 cuts viral DNA when guided by CRISPR RNA. This mechanism allows genes to be easily edited by introducing or removing DNA at specific locations in the genome. CRISPR has wide-ranging applications for improving crops, treating genetic diseases, and controlling insect populations, but also raises ethical concerns.
Serial Analysis of Gene Expression (SAGE) is a method that allows for the quantitative analysis of gene expression patterns in cells or tissues without prior knowledge of gene sequences. It works by extracting short sequence tags (10-14 base pairs) from the 3' end of transcripts and linking them together in long strings that can be cloned and sequenced simultaneously. This allows for many transcripts to be analyzed from a single sequencing reaction and provides quantitative data on gene expression levels based on tag frequencies. SAGE provides an accurate way to discover genes and analyze overall expression patterns without needing to know full mRNA sequences in advance.
The document provides information on several COVID-19 vaccines that are currently in development or have received emergency use authorization. It discusses the technology behind mRNA vaccines such as Moderna and Pfizer/BioNTech, viral vector vaccines like AstraZeneca/Oxford and Sputnik V, DNA vaccines including Zydus Cadila's ZyCoV-D, and inactivated whole virus vaccines like Bharat Biotech's Covaxin. It also summarizes trial results, dosing schedules, storage requirements, manufacturing processes, and safety profiles of these vaccine candidates. The document aims to inform readers about the different approaches being used globally in the race to end the COVID-19 pandemic.
This document discusses viruses and their relationship to the tree of life. It describes viruses as small particles that can replicate only inside living cells. Their sizes range from 30nm to 1.5um in diameter. Viruses have diverse genomes composed of DNA or RNA and different replication strategies. The document discusses hypotheses about the origin of viruses, including that they were always present or were once parasitic cellular organisms that regressed. It notes the late discovery of viruses and describes recent findings of giant viruses like Mimivirus and Pandoravirus that challenge views of the tree of life. The document concludes by discussing theories that viruses may have evolved from cellular life or were always independent genetic elements.
Virology is the study of viruses. Viruses are acellular infectious agents that can replicate only inside host cells. They are classified according to their nucleic acid composition and structure. Viruses infect all types of hosts including plants, bacteria, and animals. They have a specific life cycle within the host involving attachment, entry, uncoating, synthesis of new components, assembly and release. Viruses can cause disease in hosts through lytic infection, by establishing latency or by inducing cancer. While some diseases are caused solely by viruses, others may have a proposed viral link or involvement.
Super Resolution Microscopy Christoph Cremer "Molecular Constellations 2015"Firstscientix
This document summarizes recent work from the Cremer Lab on superresolution fluorescence microscopy techniques. It discusses:
1) Applications of localization microscopy to image DNA distribution in human cell nuclei at resolutions up to 27,000 DNA sites per square micron and individual human influenza A viruses associated with cell membranes.
2) The 2014 Nobel Prize in Chemistry being awarded to Stefan Hell, a former associate of the Cremer Lab, for his work developing stimulated emission depletion microscopy.
3) Publications from the Cremer Lab in 2014 applying localization microscopy to study chromatin, hepatitis growth factor receptors, and cytomegalovirus proteins.
CRISPR ……is a family of DNA sequences in bacteria. The sequences contain snippets of DNA from viruses that have attacked the bacterium. These snippets are used by the bacterium to detect and destroy DNA from similar viruses during subsequent attacks. These sequences play a key role in a bacterial defense system, and form the basis of a technology known as CRISPR/Cas9 that effectively and specifically changes genes within organisms
Bionanotechnology utilizes biological systems optimized through evolution like cells, proteins, and nucleic acids to create functional nanostructures made of organic and inorganic materials. It combines nanotechnology and biotechnology, originally designed to manipulate nanostructures for basic and applied biological studies. Recombinant DNA technology is central to bionanotechnology as it allows for mutation, recombination, and sequencing of genes. Monoclonal antibodies are identical antibodies cloned from a single parent cell that can be targeted as "magic bullets" against diseases. Nanowires are promising for new biosensor platforms due to properties like size, aspect ratio, and ability to exploit electrical sensing.
Naked mRNA Vaccines
mRNA vaccines can be delivered without any additional carriers, that is, in a naked
format. In this method, mRNA is dissolved in buffer and then injected directly.
https://www.creative-biolabs.com/vaccine/mrna-pharmacology-optimization-platform.htm
A method of DNA repair called Break-induced Replication (BIR) is more likely to cause genetic mutations than normal DNA synthesis, being up to 2,800 times more mutagenic. BIR occurs when a broken DNA piece invades another chromosome during replication, which happens in the wrong place and time, losing accuracy. There are several changes to the replication machinery that make BIR highly mutagenic. Neutron scattering experiments provide information about how DNA strands separate at different temperatures during denaturation, observing the first stage of separation before the strands become disordered. Understanding DNA repair mechanisms and structure allows for medical advances in addressing genetic diseases and conditions like cancer.
PCR (polymerase chain reaction) is a technique for amplifying a specific region of DNA through repeated cycles of heating and cooling in the presence of DNA polymerase. It allows for the rapid production of multiple copies of DNA from a small initial sample. Key components include a DNA template, primers that bind to the DNA region to be amplified, DNA polymerase, and buffers. During each cycle, the DNA is denatured by heating, the primers anneal to the single strands, and the polymerase extends the primers to make a new copy of the DNA region. Repeating this process results in exponential amplification of the target DNA sequence.
Researchers have found 14 genes in bedbugs that are causing resistance to common insecticides. These genes cause biological changes like thicker skin that prevents poisons from penetrating and mutations that stop toxins from affecting the nervous system. The findings could help scientists develop new insecticides, but for now exterminators have to use more manual tactics as chemicals are losing their effectiveness against the resurgent bedbug populations.
This document discusses creating a transgenic Caenorhabditis elegans model to better understand prion disease by introducing a murine prion protein gene. Researchers will validate the expression and localization of the prion protein in the transgenic worms. They will then infect the worms with toxic prion proteins to study how the toxic forms propagate by converting the normal prion protein and to analyze the effects on worm health, longevity, and robustness. This transgenic worm model will allow discoveries about prion propagation and stress responses related to prion protein misfolding in prion disease.
Mechanism of Action of mRNA Based Vaccine
1. mRNA encapsulated in the delivery vehicle is taken up by APC cell.
2. Delivery vehicle is digested, and mRNA released.
3. mRNA is translated by the host’s ribosome and antigen is formed.
4. After the antigen is formed, it can be processed through different pathways.
https://www.creative-biolabs.com/vaccine/mrna-vaccine-platform.htm
DNA origami uses DNA strands to create complex 3D structures and has applications in drug delivery, nanotechnology, microscopy, and computing. It was initially conceived in the 1980s and refined by Paul Rothemund at Caltech using the M13 phage genome, allowing a wider range of shapes. Structures can be engineered to deliver drugs like doxorubicin to cancer cells and edit genomes with CRISPR-Cas9, demonstrating uses in areas like healthcare, materials science, and molecular computing.
Biolistics, also known as gene gun technology or particle bombardment, is a physical method of genetically transforming cells. It involves coating DNA onto microprojectiles and accelerating them into target cells using a gene gun. The gene gun was originally developed in the 1980s by modifying an air pistol to fire tungsten or gold particles coated with DNA. When the particles pass through the cell wall and release the DNA in the cytoplasm, the cells become transformed. Biolistics has been used successfully to transform various plants and has also been used to deliver DNA vaccines and label cell subsets. It provides advantages over other transformation methods but also has limitations such as random integration and associated cell damage.
Biolistics, also known as gene gun technology or particle bombardment, is a physical method of DNA transfer where microprojectiles coated with DNA are accelerated into intact plant or animal cells. A gene gun works by firing microscopic gold or tungsten particles coated with DNA through a stopping screen and into target cells. Some DNA-coated particles pass through the cell wall and cytoplasm, dissociating from the particle inside the cell where the DNA may be expressed. Gene gun technology has been used successfully to transform many plant species as well as deliver DNA vaccines and label cell subsets for research.
Lecture 5 and 6 microbial_sem_6_20180307Ashfaq Ahmad
The document discusses the CRISPR-Cas9 system and its use as a genome editing tool. It provides background on the discovery of CRISPRs in bacteria and archaea. It describes the mechanism of CRISPR-Cas9 resistance, including adaptation, expression and interference stages. It discusses the components of CRISPR-Cas9 including the guide RNA and Cas9 nuclease domains. It also covers the protospacer adjacent motif (PAM) sequence, DNA repair pathways used, applications of nickase systems and multiplex genome engineering with CRISPR.
CRISPR is a new gene editing technology based on the bacterial immune system. It allows genetic engineering to be done at a fraction of the previous cost by using a bacterial enzyme called Cas9. Cas9 cuts viral DNA when guided by CRISPR RNA. This mechanism allows genes to be easily edited by introducing or removing DNA at specific locations in the genome. CRISPR has wide-ranging applications for improving crops, treating genetic diseases, and controlling insect populations, but also raises ethical concerns.
Serial Analysis of Gene Expression (SAGE) is a method that allows for the quantitative analysis of gene expression patterns in cells or tissues without prior knowledge of gene sequences. It works by extracting short sequence tags (10-14 base pairs) from the 3' end of transcripts and linking them together in long strings that can be cloned and sequenced simultaneously. This allows for many transcripts to be analyzed from a single sequencing reaction and provides quantitative data on gene expression levels based on tag frequencies. SAGE provides an accurate way to discover genes and analyze overall expression patterns without needing to know full mRNA sequences in advance.
The document provides information on several COVID-19 vaccines that are currently in development or have received emergency use authorization. It discusses the technology behind mRNA vaccines such as Moderna and Pfizer/BioNTech, viral vector vaccines like AstraZeneca/Oxford and Sputnik V, DNA vaccines including Zydus Cadila's ZyCoV-D, and inactivated whole virus vaccines like Bharat Biotech's Covaxin. It also summarizes trial results, dosing schedules, storage requirements, manufacturing processes, and safety profiles of these vaccine candidates. The document aims to inform readers about the different approaches being used globally in the race to end the COVID-19 pandemic.
This document discusses viruses and their relationship to the tree of life. It describes viruses as small particles that can replicate only inside living cells. Their sizes range from 30nm to 1.5um in diameter. Viruses have diverse genomes composed of DNA or RNA and different replication strategies. The document discusses hypotheses about the origin of viruses, including that they were always present or were once parasitic cellular organisms that regressed. It notes the late discovery of viruses and describes recent findings of giant viruses like Mimivirus and Pandoravirus that challenge views of the tree of life. The document concludes by discussing theories that viruses may have evolved from cellular life or were always independent genetic elements.
Virology is the study of viruses. Viruses are acellular infectious agents that can replicate only inside host cells. They are classified according to their nucleic acid composition and structure. Viruses infect all types of hosts including plants, bacteria, and animals. They have a specific life cycle within the host involving attachment, entry, uncoating, synthesis of new components, assembly and release. Viruses can cause disease in hosts through lytic infection, by establishing latency or by inducing cancer. While some diseases are caused solely by viruses, others may have a proposed viral link or involvement.
Super Resolution Microscopy Christoph Cremer "Molecular Constellations 2015"Firstscientix
This document summarizes recent work from the Cremer Lab on superresolution fluorescence microscopy techniques. It discusses:
1) Applications of localization microscopy to image DNA distribution in human cell nuclei at resolutions up to 27,000 DNA sites per square micron and individual human influenza A viruses associated with cell membranes.
2) The 2014 Nobel Prize in Chemistry being awarded to Stefan Hell, a former associate of the Cremer Lab, for his work developing stimulated emission depletion microscopy.
3) Publications from the Cremer Lab in 2014 applying localization microscopy to study chromatin, hepatitis growth factor receptors, and cytomegalovirus proteins.
CRISPR ……is a family of DNA sequences in bacteria. The sequences contain snippets of DNA from viruses that have attacked the bacterium. These snippets are used by the bacterium to detect and destroy DNA from similar viruses during subsequent attacks. These sequences play a key role in a bacterial defense system, and form the basis of a technology known as CRISPR/Cas9 that effectively and specifically changes genes within organisms
Bionanotechnology utilizes biological systems optimized through evolution like cells, proteins, and nucleic acids to create nanostructured materials. It combines nanotechnology and biotechnology. Recombinant DNA technology is a core technique that allows for manipulation of genes and mass production of proteins. Monoclonal antibodies are identical antibodies produced from a single clone that can be used as targeted delivery systems. Nanomaterials like silver nanoparticles show promise as antiviral agents due to their antibacterial properties. Nanowire biosensors could provide improved sensitivity, specificity, and parallelism by exploiting nanoscale properties and using techniques like field-effect transistors. Natural bionanomachinery provides examples of nanoscale functional applications that involve processes like self-assembly, energy conversion, and
Molecular Biology research evolves through the development of the technologies used for carrying them out. It is not possible to research on a large number of genes using traditional methods
(1) Nanomicrobiology is the application of nanotechnology in microbiology, exploring microbial cells at the nanoscale using techniques like atomic force microscopy. (2) Atomic force microscopy allows high-resolution imaging of microbial structures like membrane proteins under physiological conditions. (3) The nanopatch is a potential alternative to needles for vaccination, using an array of nano-sized projections to deliver vaccines painlessly into the skin's upper layers. (4) Silver nanoparticles can kill bacteria through their interaction with cellular proteins and structures. (5) Nanomicrobiology applications in energy production use microbes and bioreactors along with nanotechnologies to directly convert raw materials into fuels like ethanol through microbial processes.
This document discusses various vaccine delivery systems including particulate systems, liposomal systems, virosomes, emulsion systems, polymeric nanoparticles, micellar systems, dendrimer-based systems, immunostimulatory complexes (ISCOMs), and DNA vaccines. It provides details on the composition and mechanisms of these different delivery systems and how they can be used to deliver vaccine antigens and induce protective immunity. Physical and mucosal delivery methods are also summarized for enhancing DNA vaccine delivery.
The document discusses various applications of nanotechnology in biomedical fields such as medicine and healthcare. It describes how nanotechnology can be used to develop targeted drug delivery systems, lab-on-chip devices for disease detection and diagnosis, bionanomaterials for medical applications, and nanoscale machines and sensors. It also discusses how nanotechnology enables more precise detection and treatment of diseases like cancer at the molecular level with fewer side effects.
Genomics-based models like GARD offer a reliable alternative to animal testing for assessing chemical sensitizers. GARD uses genomic biomarker signatures from dendritic cells exposed to test substances to predict if a substance is a sensitizer or non-sensitizer. By measuring hundreds of genomic biomarkers, GARD is able to mimic the biological complexity of sensitization in vivo more closely than simple in vitro tests. The large amount of genomic data from GARD is analyzed using advanced machine learning techniques to provide clear, conclusive results on a substance's sensitization potential in a format that is easy for safety assessors to interpret.
This document discusses new trends in vaccine delivery systems. It describes liposomal, virosome, emulsion, polymeric nanoparticle, dendrimer-based, edible, DNA, mucosal, and needle-free delivery systems. DNA vaccines consist of plasmids containing pathogen sequences that stimulate immunity. Mucosal delivery targets nasal and oral mucosa using intranasal or edible vaccines. Needle-free methods include jet injectors, microneedles, and melt-in-mouth strips for painless vaccine administration. These new delivery systems provide benefits like long-term immunity with fewer doses.
Biotechnology refers to the use of living organisms or their components to develop products or perform processes for specific use. Recombinant DNA technology uses genetic engineering techniques to create recombinant DNA by cutting and joining DNA molecules containing different genetic material. This allows genes to be transferred between organisms for applications such as producing human insulin or diagnosing diseases. The key steps involve isolating DNA, using restriction enzymes to cut the DNA at specific sites, joining DNA fragments using DNA ligase, and inserting the recombinant DNA into a host cell where it can be replicated through bacterial transformation.
This seminar presentation summarizes the general characteristics and classification of viruses. It defines viruses as obligate intracellular parasites that are too small to be seen by optical microscopes and must replicate inside host cells. Viruses do not have cellular organization and contain either DNA or RNA, but not both. They lack the enzymes for protein and nucleic acid synthesis and are dependent on host cell machinery for replication. Viruses come in various shapes and sizes and have capsids made of protein that surround their nucleic acid cores. Their capsids exhibit different symmetries and some viruses have envelopes. Viruses are cultivated using techniques like animal inoculation, embryonated egg culture, and cell culture.
This document discusses the use of nanotechnology for cancer diagnosis and therapy. It begins by defining cancer and tumors, and then introduces nanotechnology and its applications in medicine including drug delivery, imaging, and cancer treatment. Specific nanoparticles discussed for cancer diagnosis include gold nanoparticles, bismuth sulfide nanoparticles, and iron oxide nanoparticles which can be used for computed tomography, magnetic resonance imaging, and ultrasound imaging, respectively. The document also discusses various nanoparticle-based approaches for detecting different types of cancer like bladder and breast cancer. In general, the document outlines how nanotechnology enables more precise cancer diagnosis and targeted therapy.
Virus is an obligate intracellular parasite which infects human beings, lower animals, insects, plants, bacteria and fungus. Viruses of medical importance to humans comprise of seven families of DNA viruses and 14 families of RNA viruses. Laboratory diagnosis of viral infections is continuously being refined to accelerate the process of identification of viruses. Because of the expense & the delay involved in obtaining a definitive virological diagnosis, discrimination in their use has to be done
This document discusses the potential applications of nanotechnology in microbiology. It begins by defining microbes and their size scale measured in microns. It then outlines several ways that nanotechnology can be used in microbiology, such as developing antimicrobial nanoparticles from materials like carbon, polymers, and metals to treat bacterial infections. The document also discusses characterization techniques for nanomaterials like transmission electron microscopy and describes some current applications of nanomaterials in areas like wound dressings, immune system modulation, and water disinfection. In conclusion, it emphasizes that nanotechnology research in microbiology is still limited in Palestine but has huge potential to be applied in many fields related to diagnostics, treatment, and infection control.
This presentation is all about biotechnology. It is about the basic aspects of Biotechnology and covers a lot of topics under biotechnology, recombinant DNA technology. This is specifically for the HSC students of Mumbai. I hope that it helps.
CONSCIOUS SEDATION USE ON ANXIETY REDUCTION, AND PATIENT AND SURGEON SATISF...Dr. B.V.Parvathy
EFFECT OF CONSCIOUS
SEDATION USE ON ANXIETY REDUCTION, AND PATIENT
AND SURGEON
SATISFACTION IN DENTAL
IMPLANT SURGERIES: A
SYSTEMATIC REVIEW AND META-ANALYSIS
Orthodontics-Periodontics Relationship
ntroduction
Biological basis for orthodontic therapy
Periodontal tissue response to orthodontic force
Effects of orthodontic tooth movement on the periodontium
Orthodontic tooth movement in adults with periodontal tissue breakdown
Specific factors associated with orthodontic tooth movement
Implants and orthodontic therapy
Systematics of combined ortho – perio treatment
Periodontally Accelerated Osteogenic Orthodontics (PAOO)
Minor periodontal surgery and orthodontic treatment
Review of literature
To evaluate the effects of B. lactis HN019 on clinical periodontal parameters (plaque accumulation and gingival bleeding), on the immunocompetence of gingival tissues [expression of BD-3, Toll-like receptor 4 (TLR4), cluster of differentiation (CD)-57 and CD-4], and on immunological properties of saliva (IgA levels) and adhesion to buccal epithelial cells and antimicrobial properties in non-surgical periodontal therapy in GCP patients.
The document discusses tissue engineering and its application in periodontal regeneration. It describes the key elements of tissue engineering which include progenitor/stem cells, scaffolds, and signaling molecules. It discusses various sources of progenitor cells for periodontal tissues, methods of scaffold fabrication, and growth factors used to enhance regeneration such as PDGF and BMPs. Studies evaluating the efficacy of different scaffold-growth factor combinations for achieving periodontal regeneration are also mentioned.
To evaluate the efficacy of the GPCS for palatal hemostasis during and after the FGG harvesting procedure.
A secondary objective was to evaluate if the placement of the suture improved the operator
visibility thereby reducing the surgical time.
Comparative study of DFDBA and FDBA block grafts.pptxDr. B.V.Parvathy
To evaluate and compare the effectiveness of demineralized freeze dried block graft and freeze dried block graft with chorion membrane as barrier membrane clinically and radiographically for the treatment of residual deep intra bony defects.
Abstract
Focused Clinical Question: Debates and questions related to the newly developed two-vector system
for classification of periodontal diseases have emerged as to how to accurately assign stage and grade
to the periodontitis cases. The aim of the present manuscript is to demonstrate the essential thought
processes that are needed in utilizing the new periodontitis classification system to diagnose two gray
zone cases.
Summary: Clinical case 1 includes an 83-year old patient diagnosed with periodontitis and classified as
Generalized Stage III Grade B periodontitis, while clinical case 2 , a 73-year old male was classified as
presenting Generalized Stage IV Grade B periodontitis. Although clinical and radiographic evaluations
revealed similarities between the cases, the thought process that includes clinical judgement is
described to guide a more accurate diagnosis following the guidelines of the new classification
system.
Conclusion: The two cases demonstrated here offer an opportunity for clinicians to recognize the
essential role of sound clinical judgment in certain cases when applying the new periodontal disease
classification system and also to clarify questions emerging from implementing this classification
system.
Key words: Staging and grading of periodontal diagnosis, Periodontal Diseases, Periodontal Diagnosis,
Abstract
Aim: The aim of this study was to determine whether the combined connective tissue
graft (CTG) with injectable platelet‐rich fibrin (i‐PRF) with coronally advanced flap
(CAF) improved root coverage of deep Miller Class I or II gingival recessions com‐
pared with CTG alone with CAF.
Material and Methods: Seventy‐two patients with Miller class I and II gingival reces‐
sions were enrolled. Thirty‐six patients were randomly assigned to the test group
(CAF+CTG+i‐PRF [700 rpm for 3 min]) or control group (CAF+CTG). Clinical evalua‐
tions were made at 6 months.
Results:At 6months, complete root coveragewas obtained at 88% of the sites treated
with CAF+CTG+i‐PRF and 80% of the sites treated with CAF+CTG. Difference be‐
tween the two groups was not statistically significant. At 6 months, the recession
depth (RD) reduction and increase in keratinized tissue height (KTH) of the test sites
were significantly better compared with the control sites.
Conclusions: According to the results, the addition of i‐PRF to the CAF+CTG treat‐
ment showed further development in terms of increasing the KTH and decreasing
RD. However, this single trial is not sufficient to advocate the true clinical effect of
i‐PRF on recession treatment with CAF+CTG and additional trials are needed.
KEYWORDS
connective tissue graft, injectable platelet‐rich fibrin, root coverage
This document provides an overview of trauma from occlusion including:
- Definitions from various dental organizations
- Etiology and types of occlusal forces that can cause trauma
- Historical perspectives on the study of occlusion and trauma
- Terminologies used to describe occlusal trauma
- Stages of tissue response to excessive occlusal forces
- Signs and symptoms of trauma from occlusion
- Classification systems for trauma from occlusion
- Examination and diagnosis techniques
- Radiographic signs of trauma
- Debate around reversibility of traumatic occlusion
- Considerations for trauma around dental implants
- Treatment approaches including occlusal adjustments and splinting
DEFINITION
INDICATION AND OBJECTIVES
PROCEDURES FOR INCREASING WIDTH OF ATTACHED GINGIVA
PROCEDURES FOR ROOT COVERAGE
TECHNIQUES FOR CORRECTION OF ABERRANT FRENUM
PAPILLA RECONSTRUCTION
RIDGE AUGMENTATION
PROCEDURES FOR INCREASING VESTIBULAR DEPTH
CROWN LENGTHENING PROCEDURES
The Efficacy of Pocket Elimination/Reduction Compared to Access Flap Surgery: A SystematicReview and Meta-analysis
To assess the efficacy and adverse effects of resective
surgery compared to access flap in patients with
periodontitis.
Impact of Different Surgical Protocols on Dimensional Changes of Free Soft Ti...Dr. B.V.Parvathy
To determine if there is a difference in the amount of shrinkage during
healing of free soft tissue autografts (FSTA) using different surgical
techniques—suturing the vestibular flap margin apically to the base of
the recipient bed versus leaving the flap margin free and unsutured.
Regenerative Surgical Treatment of Furcation Journal PresentationDr. B.V.Parvathy
AIM
To evaluate the performance and the added values of surgical regenerative techniques in terms of tooth loss, furcation closure/conversion, horizontal bone level gain and other periodontal parameters of teeth affected by periodontitis-related furcation defects, at least 12 months after surgery.
i-prf &MN in gingival augmentation in thin phenotypeDr. B.V.Parvathy
To evaluate the effect of gingival thickness (GT) and keratinized tissue width (KTW) using injectable platelet rich fibrin (i-PRF) alone and with microneedling (MN) in individuals with thin periodontal phenotypes.
Local Treatment in Periodontal pocket Journal PresentationDr. B.V.Parvathy
It was a systematic review and network meta-analysis aimed to evaluate the efficacy of adjunctive locally delivered antimicrobials, compared to sub gingival instrumentation alone or plus a placebo, on changes in probing pocket depth (PPD) and clinical attachment level (CAL), in patients with residual pockets during supportive periodontal care.
2 Stage Crown Lengthening VS 1 Stage Journal PresentationDr. B.V.Parvathy
This randomized controlled trial aimed to assess the efficacy of a two-
stage crown lengthening intervention (SCL) in the aesthetic zone
compared with a one-stage crown lengthening procedure (CCL).
This review covers the surgical and non-surgical management of
Gingival black triangles (GBTs).
This review also covers the aetiology and management of GBTs,
highlighting the importance of considering the options currently
available when treating a lost dental papilla.
This in-depth lecture by Dr. Faiza, Assistant Professor of Physiology and a distinguished graduate of Allama Iqbal Medical College (Best Graduate, MBBS 2017), offers a thorough exploration of the neurophysiology of pain and temperature sensation. With advanced qualifications including FCPS in Physiology, CHPE, DHPE (STMU), MPH (GC University), and MBA (Virtual University), Dr. Faiza brings both clinical insight and pedagogical clarity to complex sensory concepts.
🔍 What You’ll Learn in This Lecture:
I. Pain Sensation:
Types of Pain: Acute (fast, sharp) vs. Chronic (slow, burning)
Nociceptors: Distribution, types (mechanical, thermal, chemical, polymodal), and functional characteristics
Pain Receptor Activation:
TRPV1 (heat, vanilloids), TRPA1 (cold, mechanical)
ASICs (acid-sensing ion channels)
Bradykinin, prostaglandin, and purinergic receptors
Mechanism of Pain Transmission:
Rate of tissue damage as a key determinant
Pain stimuli: mechanical spasm, thermal injury (>45°C), ischemia-induced chemical pain
Dual Pain Pathways:
Neospinothalamic Tract (Fast pain): Aδ fibers, glutamate neurotransmission, thalamic projection
Paleospinothalamic Tract (Slow pain): C fibers, substance P and glutamate, brainstem involvement
II. Central Processing of Pain:
Major relay centers: Thalamus, Reticular formation, Periaqueductal gray, Mesencephalon
Functional roles of cerebral cortex vs. brainstem in pain perception
Effects of anterolateral cordotomy and thalamic ablation
III. Thermal Sensation:
Perception spectrum: Freezing cold → Burning hot
Receptor Types:
Cold Receptors: Aδ and C fibers; peak at ~24°C
Warm Receptors: Type C fibers; active from ~30–49°C
Thermal Pain Receptors: Activated at extremes; overlap with nociceptors
Mechanism of Thermal Transduction:
Based on metabolic rate modulation and intracellular chemical reaction dynamics
Adaptation Properties:
Rapid initial decline with ongoing stimulation
Importance of dynamic change (falling/rising temperature) over static input
Spatial Summation:
Larger surface area → enhanced detection (as fine as 0.01°C)
Small area → requires larger temperature shifts
🧠 Clinical Relevance:
Phantom limb pain: central sensitization, cortical plasticity
Mechanistic differences between local anesthesia and opioid response
Importance of understanding dual pain pathways in anesthesia, pain management, and neurosurgery
🎯 Ideal For:
MBBS, BDS, and Nursing students
Postgraduate Physiology and FCPS candidates
Medical educators and examiners
Professionals preparing for PLAB, USMLE, and other licensing exams
Gastric Cancer: Artificial Intelligence, Synergetics, Complex System Analysis...Oleg Kshivets
METHODS: We analyzed data of 806 consecutive GCP (age=57.1±9.5 years; tumor size=5.4±3.1 cm) radically operated (R0) and monitored in 1975-2025 (m=563, f=243; distal gastrectomies (G)=463, proximal (G)=166, total (G)=177, combined G with resection of pancreas, liver, diaphragm, duodenum, colon transversum, jejunum, cholecystectomy, splenectomy=341; T1=242, T2=223, T3=184, T4=157; N0=443, N1=109, N2=254; G1=225, G2=165, G3=416; early GC=168, invasive=638; only surgery=630, adjuvant chemoimmunotherapy-AT=176: 5-FU+thymalin/taktivin). Variables selected for prognosis study were input levels of 45 blood parameters, sex, age, TNMG, cell type, tumor size. Survival curves were estimated by the Kaplan-Meier method. Differences in curves between groups of GCP were evaluated using a log-rank test. Multivariate Cox modeling, clustering, SEPATH, Monte Carlo, bootstrap and neural networks computing were used to determine any significant dependence.
RESULTS: Overall life span (LS) was 2146.8±2350.4 days and cumulative 5-year survival (5YS) reached 58.6%, 10 years – 52.5%, 20 years – 40.2%, 30 years – 28%. 322 GCP lived more than 5 years (LS=4337.4±2377.7 days), 172 GCP – more than 10 years (LS=5966.5±2159.7 days). 291 GCP died because of GC (LS=649.9±347.1 days). AT significantly improved 5YS (67.5% vs. 56.9%) (P=0.047 by log-rank test). Cox modeling displayed that 5YS of GCP significantly depended on: phase transition (PT) in terms of synergetics N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G, prothrombin index, residual nitrogen, blood cells subpopulations, age, sex, GC cell dynamics, histology, tumor growth, bilirubin, chlorides, procedure type (P=0.000-0.021). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and healthy cells/CC (rank=1), PT early—invasive cancer (2); erythrocytes/CC (3), PT N0--N12 (4); leucocytes/CC (5), lymphocytes/CC (6), thrombocytes/CC (7), monocytes/CC (8), segmented neutrophils/CC (9), eosinophils/CC (10); stick neutrophils/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5-year survival of GCP after radical procedures significantly depended on: 1) PT “early-invasive cancer”; 2) PT N0--N12; 3) Cell Ratio Factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) GC cell dynamics; 9) GC characteristics; 10) tumor localization; 11) anthropometric data; 12) surgery type. Optimal diagnosis and treatment strategies for GC are: 1) screening and early detection of GC; 2) availability of experienced abdominal surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunotherapy for GCP with unfavorable prognosis.
A 4TH FREE WORKSHOP/
BONUS SESSION 2
Reiki Yoga “Clearing”
Our Sessions 1-3 are available for download notes. Thx for Reading.
https://ko-fi.com/ldmmia
Celebrating my 49th Bday.
A Taurus Sun, Born early May 3rd, “76”.
Also A Gemini Moon/Rising. I follow Both signs.
Welcome to the 2nd Bonus Session.
Beyond Basics - Good Vibes Only:
—Review - Good Vibes Only:
— For me, within both Reiki and Yoga sessions the essentials boost the energy. Energy can also be called Vibrations and Frequency. So many coaches are specializing within Frequency topics. They can coach entire themes using Frequency success stories. This shows how little we think of energy? We need our coaches to boost our wisdom? To boost the vibes? For Reiki & Yoga Therapy, using ‘Props’ can assist, protect, and heal energies - faster/better. Let’s Explore more.
(See Presentation for all sections, THX)
Clear Your Energy Pt 1…(See Presentation)
Clear Your Energy - Pt 2
I know we operate busy schedules. Sometimes I will yoga stretch, do warm ups, Fuse Qigong, and clear my chakras. It can be therapy or for energy boosts. So many things within our activities will leave behind energy. This can be positive or negative. We assume these energies naturally drop off. But, not always the case. Some energies latch on longterm. This all depends on your moods, emotions, and lifestyle. Hope it makes sense. We have to monitor our energy intake/out-take.
Repost:
Taking breaks, pausing, relaxing, are common things ppl struggle with. Including at times, myself. Reiki requires chill hours or meditations. We often believe our schedules are badges to display for social/approval? This is a generational society belief. It takes courage to bold/quietly declare - the opposite.
(Old Matrix Systems)
Energy Monitoring-The Media/News
A Perm bonus section I wanted to keep. This is about The media and news. Now, I understand it’s hard to avoid all news. Especially when we need our global, local, weather, and economic updates. Some news are important while others are extremely negative. Anything hosting bad vibes can be draining. I have seen this occur within distant/visual updates like news or gossip. We have to keep what we need. Then leave behind what we don’t. The intuitive coaching/Tarot rules.
There’s a lot going on for every country. So now is the time to practice calming methods for daily life or emergencies.
(See Presentation for all, new topics, THX)
To Donate/Tip/Love Offerings:
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Artificial Intelligence in Oncology: Transforming Cancer CarepptxNEIGRIHMS, SHILLONG
Artificial Intelligence (AI) is transforming oncology by enabling faster, more accurate, and personalized cancer care. AI uses technologies like machine learning (ML), deep learning (DL), and natural language processing (NLP) to analyze complex medical data, helping doctors make better decisions at every stage of cancer care.
Key Applications of AI in Oncology:
Cancer Detection & Diagnosis:
AI analyzes radiology (CT, MRI, mammography) and pathology images to detect tumors early and accurately.
Tools like PathAI, Aidoc, and DeepMind are used in clinical imaging.
Precision Medicine & Genomics:
AI interprets genetic mutations to match patients with targeted therapies.
Platforms like Tempus and OncoKB support personalized cancer treatment.
Radiation Oncology:
AI automates contouring, treatment planning, and dose optimization.
Reduces planning time and improves consistency in radiation delivery.
Drug Discovery & Clinical Trials:
AI helps discover new cancer drugs and match patients to trials.
Companies like BenevolentAI and Insilico Medicine lead this space.
Prognostics & Monitoring:
AI predicts survival, recurrence, and side effects using patient data.
Wearables and mobile apps track symptoms and alert doctors in real time.
Benefits of AI in Oncology:
Early and accurate diagnosis
Faster workflows and reduced workload
Personalized treatments
Improved patient outcomes
Challenges:
Data privacy and bias
Lack of clinical validation
Interpretability of AI decisions
Integration into hospital systems
Conclusion:
AI is not replacing oncologists but empowering them with better tools to diagnose, plan, and treat cancer more effectively. With ongoing research and responsible use, AI will play a crucial role in the future of oncology.
Normal distribution and Z score Test for post graduate and undergraduate stu...Tauseef Jawaid
Normal distribution and Z score
The normal distribution is also known as a Gaussian distribution or probability bell curve.
It is symmetric about the mean and indicates that values near the mean occur more frequently than the values that are farther away from the mean
Chair, Jonathan S. Appelbaum, MD, FACP, AAHIVS, prepared useful Practice Aids pertaining to HIV for this CME/MOC/NCPD/CPE/AAPA/IPCE activity titled “Defining and Delivering Person-Centric HIV Care in Key Populations.” For the full presentation, downloadable Practice Aids, and complete CME/MOC/NCPD/CPE/AAPA/IPCE information, and to apply for credit, please visit us at https://bit.ly/4eVxdWJ. CME/MOC/NCPD/CPE/AAPA/IPCE credit will be available until April 27, 2026.
This presentation provides a comprehensive overview of pleural effusion, a condition characterized by the accumulation of excess fluid in the pleural space. It covers the types, causes, clinical features, diagnostic methods, and treatment options, with illustrative visuals and case-based insights. Ideal for medical students, healthcare professionals, and anyone seeking a deeper understanding of pleural diseases
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, B...Oleg Kshivets
METHODS: We analyzed data of 786 consecutive LCP (age=57.7±8.3 years; tumor size=4.1±2.4 cm) radically operated and monitored in 1985-2025 (m=674, f=112; upper lobectomies=284, lower lobectomies=180, middle lobectomies=18, bilobectomies=46, pneumonectomies=258, mediastinal lymph node dissection=786; combined procedures with resection of trachea, carina, atrium, aorta, VCS, vena azygos, pericardium, liver, diaphragm, ribs, esophagus=199; only surgery-S=629, adjuvant chemoimmunoradiotherapy-AT=157: CAV/gemzar + cisplatin + thymalin/taktivin + radiotherapy 45-50Gy; T1=328, T2=260, T3=137, T4=61; N0=528, N1=133, N2=125, M0=786; G1=199, G2=248, G3=339; squamous=423, adenocarcinoma=313, large cell=50; early LC=221, invasive LC=565; right LC=422, left LC=364; central=298; peripheral=488. Variables selected for study were input levels of 45 blood parameters, sex, age, TNMG, cell type, tumor size. Regression modeling, clustering, SEPATH, Monte Carlo, bootstrap and neural networks computing were used to determine significant dependence.
RESULTS: Overall life span (LS) was 2245.9±1741.5 days and cumulative 5-year survival (5YS) reached 73.4%, 10 years – 65.2%, 20 years – 42.5%. 516 LCP lived more than 5 years (LS=3118.2±1527.7 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.2% vs.63.5%, P=0.00001 by log-rank test). AT significantly improved 5YS (65.6% vs. 34.8%) (P=0.00001 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, AT, blood cell circuit, prothrombin index, age, bilirubin, procedure type (P=0.000-0.044). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), healthy cells/CC (4), eosinophils/CC (5), erythrocytes/CC (6), segmented neutrophils/CC (7), lymphocytes/CC (8), monocytes/CC (9); stick neutrophils (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) p
Awake Craniotomy with endoscopic support, guided by intraoperative ultrasound...Dr. Damian Lastra Copello
Awake Craniotomy with endoscopic support, guided by intraoperative ultrasound, Imeka Neuronavigator and MRI for excision of low-grade Astrocytoma in Sharab Hospital. Case Report.
Fontes C1; Sama Y2; Sulayman S 3; BaldehS 4; Ceesay A5; Copello DL6
1. Carlos Fontes. Licensed Nurse in Anesthesiology and Resuscitation. Master's Degree in Emergencies, Assistant Professor University of Medical Sciences of Camaguey. Cuba. Anesthesiology Service, Sharab Hospital. Republic of The Gambia.
2. Sama Yamundaw. Nurse Anesthesiologist Nurse. Anesthesiology Service at Sharab Hospital. Republic of The Gambia
3. Sulayman Sima. Sharab Hospital Surgery Service. Republic of The Gambia.
4. Sanna Baldeh. Scrubs Nurse. Sharab Hospital Surgery Service. Republic of The Gambia.
5. 5 Abdoulie Ceesay. Scrubs Nurse. Sharab Hospital Surgery Service. Republic of The Gambia
6. Dr.Damian Lastra Copello. Consultant Neurosurgeon.MD. Emergency and Critical Care Fellowship. Neuro-Oncology and Spine Surgeon, Lecturer, Researcher, Santiago de Cuba Medical Sciences University, Havana University, Cuba. Neurosurgery Service Sharab Hospital. The Gambia.
ORCID: 0000-0002-9393-1933
Abstract
Low-grade astrocytomas are considered low-grade gliomas. Low-grade gliomas are brain tumors that grow slowly and require specialized care.
They are a group of tumors that include: fibrillary astrocytoma, protoplasmic astrocytoma and gemistocytic astrocytoma. They differ from their counterpart high-grade astrocytomas, because they have a better prognosis and longer survival, although each of them is a different disease with a different course and prognosis.As a group, they represent 26.6% of all tumors derived from glial cells in the brain.Separated by age, they represent approximately 15% of intracranial tumors in adults and 25% in children. (1 -8)
The age of presentation of these tumors in adults is around the 4th decade of life. The frontal lobe is the most frequent location, followed by the temporal and parietal lobes.
Currently, technology has increased the safety of surgical procedures, with the arrival of techniques such as neuronavigation, stereotaxy, transoperative brain mapping, transoperative ultrasound or ultrasonic aspirator; all of them in contemporary times must be used with reasoning for the greater benefit of the patient.
A craniotomy is a complex neurological procedure that involves opening the skull, performing the necessary operation, and closing the skull, securing the bone in its original position. (4 -10)
Awake craniotomy is mainly used for mapping and resection of lesions in vitally important brain areas where imaging is not sufficiently sensitive. These are most commonly speech and motor areas. In all sedation-anesthesia techniques, the patients are awake and able to speak and/or move during the mapping phase.
It is a technique used to improve perioperative outcomes, achieving a faster recovery of the patient with a reduction in the percentage of postoperative complications.
The joint EASD (European Association for the Study of Diabetes) and ADA (American Diabetes Association) Consensus Report on the management of hyperglycaemia in type 2 diabetes serves as a comprehensive, evidence-based guide to help clinicians provide patient-centered care. Updated regularly, the report reflects evolving scientific evidence, advances in pharmacological therapies, and a growing emphasis on individualization of treatment.
The 2022 edition emphasizes a holistic approach to managing type 2 diabetes, integrating lifestyle interventions, glucose-lowering medications, cardiovascular and renal risk reduction, and patient preferences. The report moves beyond strict glycemic targets alone and promotes the consideration of comorbid conditions—such as cardiovascular disease, chronic kidney disease (CKD), and obesity—when choosing therapies.
The document highlights the importance of metformin as a foundational therapy but recommends early use of SGLT2 inhibitors or GLP-1 receptor agonists in patients with established cardiovascular or renal disease, regardless of HbA1c levels. These classes offer benefits beyond glucose control, including heart failure risk reduction and kidney protection.
A key feature of the consensus is its endorsement of shared decision-making, taking into account patient goals, preferences, access, and affordability. The report also discusses the role of digital health tools, continuous glucose monitoring, and team-based care in improving outcomes.
Glycemic targets are individualized, typically aiming for an HbA1c of <7%, but allowing flexibility based on age, duration of diabetes, comorbidities, and risk of hypoglycemia. The report also underscores the need for regular reassessment, treatment intensification when needed, and ongoing patient education.
Overall, the EASD-ADA consensus provides a dynamic framework that supports a multifaceted, patient-centric approach to type 2 diabetes care, aiming to reduce complications, improve quality of life, and promote long-term health outcomes.
duce their risk of acquiring HIV.**
* **Highly effective when taken consistently.**
* **Requires regular HIV testing and medical monitoring.**
• **Post-Exposure Prophylaxis (PEP):**
* **Antiretroviral medications taken after a potential exposure to HIV to prevent infection.**
* **Must be started within 72 hours of exposure.**
* **Typically involves a 28-day course of ART.**
• **Harm Reduction Strategies:**
* **Needle Exchange Programs:** Provide clean needles and syringes to intravenous drug users to reduce the risk of sharing needles and transmitting HIV.
* **Opioid Substitution Therapy:** Using medications such as methadone or buprenorphine to treat opioid addiction.
• **Education and Awareness:**
* **Providing accurate information about HIV transmission, prevention, and treatment.**
* **Addressing stigma and discrimination associated with HIV.**
**VIII. Global Impact of HIV/AIDS**
HIV/AIDS has had a profound impact on global health and development.
• **Prevalence:** An estimated 38.4 million people worldwide were living with HIV in 2021.
• **New Infections:** Approximately 1.5 million new HIV infections occurred in 2021.
• **Deaths:** 650,000 people died from AIDS-related illnesses in 2021.
• **Regional Differences:** The burden of HIV/AIDS is disproportionately high in sub-Saharan Africa.
• **Impact on Life Expectancy:** HIV/AIDS has significantly reduced life expectancy in many countries.
• **Economic Impact:** HIV/AIDS has had a negative impact on economic development, particularly in countries with high prevalence rates.
• **Social Impact:** HIV/AIDS has led to stigma, discrimination, and social isolation for affected individuals and communities.
**IX. Ongoing Research and Future Directions**
Research continues to play a vital role in the fight against HIV/AIDS.
• **Cure Research:** Scientists are working to develop a cure for HIV infection, which could involve eliminating the virus from the body or achieving long-term remission without the need for ART.
• **Vaccine Development:** Efforts are underway to develop a safe and effective HIV vaccine that could prevent new infections.
• **Improved Treatment Strategies:** Researchers are developing new antiretroviral drugs that are more effective, easier to take, and have fewer side effects.
• **Prevention Strategies:** Scientists are exploring new prevention strategies, such as long-acting injectable PrEP and broadly neutralizing antibodies.
• **Understanding HIV Reservoirs:** Research is focused on understanding HIV reservoirs, which are cells in the body where HIV can hide and persist even during ART.
• **Addressing Co-morbidities:** Research is exploring how HIV infection affects other health conditions, such as cardiovascular disease, cancer, and neurological disorders.
**X. Conclusion**
HIV/AIDS remains a significant global health challenge, but significant progress has been made in recent decad
The Physiology of Central Nervous System - Sensory PathwaysMedicoseAcademics
Learning Objectives:
1. Enumerate the sensory pathways
2. Enlist the sensations carried by the Dorsal Column Medial Lemniscus (DCML) system
3. Trace the DCML tract
4. Describe the characteristics of DCML system
5. Enlist the sensations carried by the Spinothalamic tract/Anterolateral System (ALS)
6. Trace the Spinothalamic tract/Anterolateral system
7. Compare the characteristics of DCML and ALS
8. Correlate the functions of DCML and ALS with the sensory loss seen in Brown-Sequard syndrome
15. Jens
Martensson
IMMUNITY
Resistance exhibited by the host towards injury caused by microorganisms and their
products.
IMMUNITY SYSTEM
Collection of cells, tissues and molecules that function to defend against infectious
microbes.