DNA methylation in cognition comes of age
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.A study shows that reduced DNA methyltransferase Dnmt3a2 in aged mice impairs memory. Restoring this enzyme in older mice improved memory, while reducing it in younger mice caused memory loss.
Area Of Science
- Neuroscience
- Epigenetics
- Molecular Biology
Background
- Aging is associated with cognitive decline, particularly memory impairment.
- The hippocampus is crucial for memory formation and is affected by aging.
- Epigenetic modifications, such as DNA methylation, play a role in gene regulation and aging.
Purpose Of The Study
- To investigate the role of DNA methyltransferase Dnmt3a2 in age-related memory deficits.
- To determine if modulating Dnmt3a2 expression can rescue or induce memory impairments.
Main Methods
- Assessed hippocampal expression levels of Dnmt3a2 in young and aged mice.
- Utilized genetic techniques to re-express Dnmt3a2 in aged mice.
- Employed knockdown strategies to reduce Dnmt3a2 expression in young mice.
- Evaluated memory performance using established behavioral tests.
Main Results
- Aged mice exhibited significantly decreased hippocampal expression of Dnmt3a2 compared to young mice.
- Re-expression of Dnmt3a2 in aged mice successfully reversed their memory deficits.
- Knockdown of Dnmt3a2 in young mice led to impaired memory formation.
Conclusions
- Dnmt3a2 is critical for maintaining cognitive function, particularly memory, during aging.
- Modulating Dnmt3a2 expression represents a potential therapeutic target for age-related memory decline.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
Related Concept Videos
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
In most mammals, females have two X chromosomes (XX) while males have an X and a Y chromosome (XY). The X chromosome contains significantly more genes than the Y chromosome. Therefore, to prevent an excess of X chromosome-linked gene expression in females, one of the two X chromosomes is randomly silenced during early development....
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...