Small Noncoding RNAome Changes During Human Bone Marrow Mesenchymal Stem Cells Senescence In Vitro

Area of Science:

• Stem Cell Biology
• Molecular Biology
• Gerontology

Background:

• Human bone marrow mesenchymal stem cells (hBMSCs) are crucial for regenerative medicine due to their self-renewal and differentiation capabilities.
• Cellular senescence, characterized by declining proliferation and function, limits the therapeutic efficacy of aged hBMSCs.
• The precise molecular mechanisms underlying hBMSC senescence remain largely unknown.

Purpose of the Study:

• To investigate the alterations in small noncoding RNA expression during the replicative senescence of hBMSCs.
• To identify potential molecular players involved in hBMSC aging.

Main Methods:

• Establishment of a replicative senescence model using human bone marrow mesenchymal stem cells (hBMSCs).
• High-throughput small RNA sequencing to analyze global noncoding RNA expression profiles.
• Quantitative real-time PCR (qPCR) for validation of sequencing findings.

Main Results:

• Significant differential expression was observed in 203 microRNAs (miRNAs), 46 PIWI-interacting RNAs (piRNAs), 63 small nucleolar RNAs (snoRNAs), 12 small nuclear RNAs (snRNAs), and 7 repeat-associated small interacting RNAs (rasiRNAs) during senescence.
• qPCR validation confirmed significant expression changes in 24 miRNAs, 34 piRNAs, 34 snoRNAs, and 2 snRNAs.

Conclusions:

• Replicative senescence in hBMSCs is associated with widespread changes in small noncoding RNA expression.
• These findings provide novel insights into the molecular basis of hBMSC aging.
• The identified noncoding RNAs represent potential targets for developing strategies to counteract hBMSC senescence and enhance cell-based therapies.