Transcriptomic analysis to identify genes associated with hypothalamus vulnerability in aging mice with cognitive...

Area of Science:

• Neuroscience
• Genomics
• Aging Research

Background:

• Cognitive decline is a hallmark of aging.
• The hypothalamus plays a key role in aging and cognition.
• Molecular mechanisms linking the hypothalamus to cognitive aging are poorly understood.

Purpose of the Study:

• Identify hypothalamic molecular predictors of age-related cognitive decline.
• Investigate gene expression changes in the hypothalamus during aging.
• Elucidate biological pathways affected by aging in the hypothalamus.

Main Methods:

• Morris water maze (MWM) test for cognitive assessment in young and aged mice.
• Transcriptome sequencing of hypothalamic tissue.
• Gene Ontology (GO) and KEGG pathway analyses.
• Quantitative reverse transcription PCR (qRT-PCR) for validation.

Main Results:

• Aged mice exhibited significantly impaired spatial learning and memory in MWM tests.
• Transcriptome analysis revealed differentially expressed genes (DEGs) in the hypothalamus of aged mice.
• KEGG analysis highlighted DEGs involved in immune, neurodegenerative, nervous system, and aging pathways.

Conclusions:

• Hypothalamic gene expression changes are associated with cognitive decline during aging.
• Identified DEGs, particularly those in immune and neurodegenerative pathways, may serve as predictors of cognitive function.
• This study provides a foundation for understanding hypothalamic molecular mechanisms in cognitive aging.