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Longitudinal genetic studies of cognitive characteristics
R N Mustafin1, A V Kazantseva2, R F Enikeeva2
1Bashkir State Medical University, Ufa, Russia.
Vavilovskii Zhurnal Genetiki I Selektsii
|March 4, 2021
Summary
Environmental and epigenetic factors significantly influence cognitive abilities and impairment. Understanding these mechanisms, including DNA methylation and transposable elements, offers pathways for preventing cognitive decline.
Area of Science:
- Neuroscience and Genetics
- Epigenetics and Environmental Health
Background:
- Cognitive traits and functions are influenced by various factors, leading to variations and potential impairment.
- Environmental influences such as nutrition, prenatal stress, and social isolation play a role in cognitive functioning.
- Epigenetic factors are crucial in mediating environmental effects on cognitive characteristics.
Purpose of the Study:
- To review longitudinal studies on cognitive traits, their variations, and potential correction strategies to prevent cognitive impairment.
- To explore the involvement of environmental factors and epigenetic mechanisms in cognitive functioning.
- To identify genetic and epigenetic factors associated with both normal cognition and cognitive disorders.
Main Methods:
- Review of longitudinal studies and meta-analyses on cognitive traits.
- Analysis of environmental factors (nutrition, stress, social isolation) and their impact on cognition.
- Investigation of epigenetic mechanisms including DNA methylation, histone modification, and chromatin remodeling.
- Examination of the role of transposable elements in environmental influence and transgenerational epigenetic inheritance.
Main Results:
- Environmental factors significantly impact cognitive functioning, with epigenetic factors mediating these effects.
- Specific genes (e.g., BDNF, COMT, CYP2D6) are associated with cognitive abilities.
- Genes involved in DNA methylation, histone modification, and chromatin remodeling are linked to both normal cognition and psychiatric disorders with cognitive deficits.
- Transposable elements mediate environmental influences on epigenetics and may explain transgenerational transfer of cognitive information.
Conclusions:
- Cognitive abilities are shaped by a complex interplay of genetic, environmental, and epigenetic factors.
- Understanding epigenetic modifications, particularly those involving DNA methylation and transposable elements, is key to developing strategies for preventing cognitive impairment.
- Similar epigenetic and genetic mechanisms underlie normal cognition and cognitive disorders, highlighting potential therapeutic targets.
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