The Severity of Muscle Performance Deterioration in Sarcopenia Correlates With Circulating Muscle Tissue-Specific...

Area of Science:

• Gerontology
• Molecular Biology
• Biomarkers

Background:

• Sarcopenia, an age-associated loss of muscle mass and function, affects many older adults.
• It is of growing interest across various medical specialties, including internal medicine, geriatrics, and cardiology.
• Current diagnostic and classification methods for sarcopenia's severity need further refinement.

Purpose of the Study:

• To identify a specific microRNA (miRNA) expression profile associated with sarcopenia.
• To evaluate the potential of circulating miRNAs as biomarkers for sarcopenia diagnosis and severity classification.
• To correlate miRNA expression levels with muscle performance in elderly individuals.

Main Methods:

• Analysis of circulating miRNA expression in the blood plasma of 80 elderly patients (55-86 years) with varying degrees of muscle performance deterioration.
• Classification of patients based on the Short Physical Performance Battery (SPPB) score.
• Quantification of specific muscle tissue-specific miRNAs (MyomiRNAs), including miRNA-1, miRNA-29a/b, miRNA-133a/b, miRNA-206, miRNA-208b, and miRNA-499.

Main Results:

• A distinct miRNA expression profile was identified in patients with sarcopenia.
• Patients with lower muscle performance exhibited increased expression of miRNA-1, miRNA-29a, and miRNA-29b.
• Conversely, decreased expression was observed for miRNA-206, miRNA-133a, miRNA-133b, miRNA-208b, and miRNA-499 in patients with low muscle performance.

Conclusions:

• The identified miRNA expression profile in blood plasma shows potential as a specific biomarker for sarcopenia diagnostics.
• The severity of muscle performance deterioration in sarcopenia correlates with specific circulating miRNA expression patterns.
• Further clinical studies are warranted to elucidate the underlying molecular mechanisms and validate these findings.