Epigenetics is the study of changes in gene activity and expression that do not alter the underlying genetic code but can be passed down to subsequent generations. It was first coined by Conrad Waddington in the 1940s and combines developmental biology and genetics. Epigenetic mechanisms like chromatin remodeling, methylation, and acetylation are major ways that gene expression is regulated and can determine cell types while also playing a role in cancer and potential reprogramming of cells.
Epigenetics is the study, in the field of genetics, of cellular and physiological phenotypic trait variations that are caused by external or environmental factors that switch genes on and off and affect how cells read genes instead of being caused by changes in the DNA sequence. -Wikipedia
"Epigenetics refers to genetic factors that change an organism’s appearance or biological functions without changing the actual DNA sequence. In other words, gene expression changes but the genes themselves don’t. Epigenetics adds an additional level of complexity to the genetic code." - Public Health Cafe
Epigenetics is the study, in the field of genetics, of cellular and physiological phenotypic trait variations that are caused by external or environmental factors that switch genes on and off and affect how cells read genes instead of being caused by changes in the DNA sequence. -Wikipedia
"Epigenetics refers to genetic factors that change an organism’s appearance or biological functions without changing the actual DNA sequence. In other words, gene expression changes but the genes themselves don’t. Epigenetics adds an additional level of complexity to the genetic code." - Public Health Cafe
This presentation on Epigenetics is most advanced and evidence based one. Its Very helpful for Genetics students and research fellows, Reproductive Medicine specialist, Reproductive Biologist, Infertility practitioners
The study of nucleic acids began with the discovery of DNA, progressed to the study of genes and small fragments, and has now exploded to the field of genomics. Genomics is the study of entire genomes, including the complete set of genes, their nucleotide sequence and organization, and their interactions within a species and with other species. The advances in genomics have been made possible by DNA sequencing technology. [Source: https://opentextbc.ca/biology/chapter/10-3-genomics-and-proteomics/]
Epigenetics is the study of heritable changes in gene expression (active versus inactive genes) that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype — which in turn affects how cells read the genes. - [https://www.whatisepigenetics.com/fundamentals/]
Author of this presentation: The University of Western Australia
Short intro epigenetics & nutrigenomics& the early impact of nutrition Norwich Research Park
Our “genes” are not fixed: “Plasticity” of the genotype by epigenetic mechanisms => important for the phenotypic impact of nutrition.
• Histone and DNA modifications have impact on gene transcription efficiency. Methylation (more stable) and acetylation (more flexible) have impact on chromatin
structures.
• Epigenetic modifications have impact on offspring, embryo development, ageing and disease development or prevention => example: Dutch Hunger Winter.
Health status of future parents are very important for the future health of children.
Early healthy nutrition & lifestyle essential for successful healthy life & “ageing”.
This presentation on Epigenetics is most advanced and evidence based one. Its Very helpful for Genetics students and research fellows, Reproductive Medicine specialist, Reproductive Biologist, Infertility practitioners
The study of nucleic acids began with the discovery of DNA, progressed to the study of genes and small fragments, and has now exploded to the field of genomics. Genomics is the study of entire genomes, including the complete set of genes, their nucleotide sequence and organization, and their interactions within a species and with other species. The advances in genomics have been made possible by DNA sequencing technology. [Source: https://opentextbc.ca/biology/chapter/10-3-genomics-and-proteomics/]
Epigenetics is the study of heritable changes in gene expression (active versus inactive genes) that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype — which in turn affects how cells read the genes. - [https://www.whatisepigenetics.com/fundamentals/]
Author of this presentation: The University of Western Australia
Short intro epigenetics & nutrigenomics& the early impact of nutrition Norwich Research Park
Our “genes” are not fixed: “Plasticity” of the genotype by epigenetic mechanisms => important for the phenotypic impact of nutrition.
• Histone and DNA modifications have impact on gene transcription efficiency. Methylation (more stable) and acetylation (more flexible) have impact on chromatin
structures.
• Epigenetic modifications have impact on offspring, embryo development, ageing and disease development or prevention => example: Dutch Hunger Winter.
Health status of future parents are very important for the future health of children.
Early healthy nutrition & lifestyle essential for successful healthy life & “ageing”.
DNA Methylation and Epigenetic Events Underlying Renal Cell Carcinomaskomalicarol
Renal cell carcinoma (RCC) refers to a group of tumors that develop from the epithelium of the kidney tubes, including clear cell
RCC, papillary RCC, and chromophobe RCC. Most clear cell renal
carcinomas have a large histologic subtype, genetic or epigenetic
genetic von Hippel-Lindau (VHL). A comprehensive analysis of
the genetic modification genome suggested that chromosome 3p
loss and chromosome gains 5q and 7 may be a significant copy
defect in the development of clear kidney cell cancer. A more potent renal cell carcinoma may develop if chromosome 1p, 4, 9,
13q, or 14q is also lost. Renal carcinogenesis is not associated with
chronic inflammation or histological changes. However, regional hypermethylation of DNA in CpG C-type islands has already
accumulated in cancer-free kidney tissue, implying that the presence of malignant kidney lesions may also be detected by modified
DNA methylation. Modification of DNA methylation in cancerous
kidney tissue may advance kidney tissue to epigenetic mutations
and genes, leading to more serious cancers and even determining
a patient’s outcome
In medicine, gene therapy (also called human gene transfer) is the therapeutic delivery of nucleic acid into a patient's cells as a drug to treat disease.[ The first attempt at modifying human DNA was performed in 1980 by Martin Cline, but the first successful nuclear gene transfer in humans, approved by the National Institutes of Health, was performed in May 1989.[2] The first therapeutic use of gene transfer as well as the first direct insertion of human DNA into the nuclear genome was performed by French Anderson in a trial starting in September 1990.
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Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
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https://www.rttsweb.com/jmeter-integration-webinar
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Epigenetics
1.
2. WHAT IS EPIGENETICS?
the study of changes in gene
activity that do not cause
alterations to the genetic code, but
can still be passed on to next
generations
3. HISTORY
-New branch of scientific study
-Conrad Waddington first coined the name of
Epigenetics, combining the fields of
developmental Biology and Genetics
-The idea that the methylation of DNA could affect
gene expression, and that these patterns could
be heritable, was announced by two groups in
1975
4. TECHNIQUES / METHODS
Chromatin Remodeling - genes are
regulated
Methylation- addition of a methyl group
Acetylation- active transcription
5. ADVANTAGES
Major ways in which gene expression is
regulated
Determines the differences between the
cells in your body
Loss of the modifications often leads to
cancer
Reprogram cells to different functions
7. FUTURE
Striving to cure Epigenetic diseases such
as cancer
The drug azacitidine treats leukemia
Human Genome Project
Doctors reexamining past epigenetic cures
9. EXAMPLES (CONT.)
identical twins have identical DNA. But , during
their lifetimes there are differences in their
phenotypes. One possible explanation could be
changes in the epigenetic factors that affect genes
and modify gene expression. Twins have some
epigenetic factors that are identical in early life,
but they acquire differences as time passes. It
could be that these differences modify genes in
such a way as to create the phenotype differences
that have been observed.