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Updated: May 20, 2026
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Preparation and Culture of Myogenic Precursor Cells/Primary Myoblasts from Skeletal Muscle of Adult and Aged Humans
Published on: February 16, 2017
Immune cell contributions to sarcopenia: Evidence from genetic analyses
Yuanjie Duan1,2,3, Juan Liu1,2,3, Shiyu Lin1,2
1Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, School of Public Health, Changsha Medical University, Changsha, Hunan, China.
Medicine
|May 19, 2026
Summary
Immune cell activity, particularly myeloid cells, causally influences sarcopenia development, increasing risk. However, certain lymphoid cell traits offer protective effects against this age-related muscle loss.
Area of Science:
- Immunology
- Gerontology
- Genetics
Background:
- Sarcopenia, an age-related loss of muscle mass and strength, is increasingly linked to immune system dysregulation.
- The precise causal relationship between immune cell activity and sarcopenia remains incompletely understood.
Purpose of the Study:
- To investigate the causal influence of immune cell traits on sarcopenia using a bidirectional Mendelian randomization (MR) approach.
- To elucidate the specific roles of different immune cell subsets in sarcopenia pathophysiology.
Main Methods:
- Utilized a 2-sample MR analysis with genetic instruments for 731 immune cell traits from a European ancestry cohort.
- Sarcopenia data (hand grip strength, appendicular lean mass, walking pace) were sourced from large genome-wide association studies.
- Employed inverse-variance weighted, weighted median, and MR-Egger regression for causal effect estimation and sensitivity analyses.
Main Results:
- Identified significant causal effects of specific immune cell traits on sarcopenia.
- Increased human leukocyte antigen-DR expression on myeloid and dendritic cells correlated with reduced muscle mass, slower walking pace, and lower grip strength.
- Elevated levels of certain T and B cell subsets demonstrated a protective association against sarcopenia.
Conclusions:
- Provided robust genetic evidence for a causal link between immune cell composition and sarcopenia.
- Suggests myeloid cells may contribute to sarcopenia development, while lymphoid cells may offer protection.
- Findings offer novel insights into sarcopenia pathophysiology and potential therapeutic targets.
