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PsychAD Consortium Maps Gene Activity in Prefrontal Cortex
Scientists establish a detailed molecular map of gene activity in the brain’s prefrontal cortex under the PsychAD research consortium, with support from the U.S. National Institute on Aging (NIA). The map is in the news for detailing cell-type-wise gene activity patterns linked to brain development, ageing, and multiple brain disorders.
Gene Activity Map of the Prefrontal Cortex:
| Dimension | Key Details |
|---|---|
| Objective | The map provides for understanding normal brain development, ageing, and disorders such as Alzheimer’s, Parkinson’s, schizophrenia, and dementia. |
| Prefrontal cortex: location | The prefrontal cortex comprises an anterior region of the brain's outer layer, directly behind the forehead. |
| Prefrontal cortex: major functions | It comprises functions including planning, decision-making, regulation of emotions, behavioural adaptation, and higher cognitive functions. |
| Prefrontal cortex: susceptibility | It is especially susceptible to age-related changes and comprises a significant role in various psychiatric and neurodegenerative disorders. |
| Gene activity | Gene activity, also known as gene expression, comprises cellular use of genetic information for synthesis of functional molecules, primarily proteins. |
| Study approach | The research comprises analysis of gene activity across various brain cell types to map links between gene activity, cell function, brain development and ageing, and disease processes. |
| Key findings: similarities among disorders | Key findings comprise similarities in gene expression profiles among Alzheimer’s disease, Lewy body disease, vascular dementia, and Parkinson’s disease. |
| Key findings: commonly affected biological processes | Commonly affected biological processes comprise nerve-cell development, neuronal communication, blood-vessel biology, and microglia-related pathways. |
| Microglia | Microglia comprise the resident immune cells of the central nervous system, and the findings comprise shared molecular pathways in microglia between Alzheimer’s disease and Parkinson’s disease. |
| Life-stage molecular patterns in prefrontal cortex | Key findings comprise significant molecular changes from infancy to adulthood, relative molecular stability throughout most of adulthood, and renewed molecular changes in later life, particularly in immune and support cells. |
| Transition point | The study comprises a transition point at approximately 24 years of age, marking onset of the stability phase. |
| Cognitive resilience in Alzheimer’s | The findings comprise differences in energy-related cellular processes in individuals who maintain relatively preserved cognitive function despite significant Alzheimer’s pathology. |
| Inherited genetic risk mapping | The study comprises mapped genetic influences affecting the activity of over 14,000 genes, establishing connections among inherited genetic risk, particular genes, and specific cell types. |
| Potential utility | The findings comprise identification of genes associated with disease, cell populations that are particularly vulnerable, relevant molecular pathways, and potential targets for therapeutic intervention. |