Alterations in the transcriptome and microRNAs of adipose-derived mesenchymal stem cells from different sites in rats during aging.
Abstract
Aging is an intricate and gradual process characterized by tissue and cellular dysfunction. Adipose-derived mesenchymal stem cells (ADMSCs) experience a functional decline as part of systemic aging. However, the alterations in ADMSCs across various anatomical sites throughout an individual's lifespan remain unclear. To shed light on these changes, we collected white adipose tissue and brown adipose tissue samples from the epididymis, perirenal, inguinal, and scapular regions of young, adult, and aged rats and subsequently isolated ADMSCs for RNA sequencing. As aging progressed, we observed a reduction in the number of ADMSCs at all anatomical sites. Marker genes of ADMSCs from different sites were identified. Aging triggered notable activation of inflammatory and immune responses while diminishing the ADMSC differentiation capacity and ability to maintain a normal tissue morphology. Furthermore, miR-195-5p and miR-497-3p, which promoted cell senescence and apoptosis while inhibiting proliferation and differentiation, were positively correlated with aging. These findings increase our understanding of ADMSC senescence and underscore the unique physiological changes and functions of ADMSCs across different anatomical sites during aging.
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Research summary
The paper investigates the alterations in adipose-derived mesenchymal stem cells (ADMSCs) during aging, which is directly related to the biological processes of aging and cellular senescence. While it provides insights into the functional decline of ADMSCs and their unique physiological changes across different anatomical sites, the findings are primarily descriptive and do not propose solutions to the root causes of aging or mechanisms for lifespan extension. Thus, while it contributes to the understanding of aging at a cellular level, its impact is limited.
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