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Causal Associations Between Sarcopenia and Gestational Diabetes Mellitus
Yihong Huang1,2, Shanshan Zhao1,2, Jiajun Hong1,2
1Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People's Republic of China.
International Journal of Women'S Health
|February 6, 2025
Summary
Sarcopenia causally increases gestational diabetes mellitus (GDM) risk, with traits like low muscle mass and grip strength being key indicators. However, GDM does not appear to cause sarcopenia, suggesting a one-way relationship.
Area of Science:
- Genetics
- Metabolic Health
- Gerontology
Background:
- Sarcopenia, characterized by loss of muscle mass and strength, is increasingly recognized as a potential risk factor for various health conditions.
- The relationship between sarcopenia and gestational diabetes mellitus (GDM) is not fully understood, necessitating further investigation into potential causal links.
- Gestational diabetes mellitus (GDM) poses risks to both maternal and fetal health, highlighting the importance of identifying its contributing factors.
Purpose of the Study:
- To investigate the potential causal relationship between sarcopenia and gestational diabetes mellitus (GDM) using a bi-directional Mendelian randomization (MR) approach.
- To determine if sarcopenia influences the risk of developing GDM.
- To assess whether GDM has a causal effect on sarcopenia-related traits.
Main Methods:
- Utilized large-scale genetic data from FinnGen datasets and genome-wide association studies (GWAS).
- Employed a bi-directional Mendelian randomization (MR) design to infer causality.
- Conducted forward MR (sarcopenia as exposure, GDM as outcome) and reverse MR (GDM as exposure, sarcopenia traits as outcome) analyses.
- Performed sensitivity analyses to ensure the robustness and reliability of the findings, including checks for pleiotropy.
Main Results:
- Forward MR analysis indicated that sarcopenia-related traits, including appendicular lean mass, right and left-hand grip strength, and usual walking pace, are significantly associated with an increased risk of GDM.
- Specifically, reduced appendicular lean mass (OR=1.2182), lower grip strength (OR=1.4194-1.6064), and slower walking pace (OR=3.3676) were linked to higher GDM risk.
- Reverse MR analysis found no evidence that GDM causally affects sarcopenia-related traits, and no significant pleiotropy was detected.
Conclusions:
- Sarcopenia exerts a significant causal influence on the development of gestational diabetes mellitus (GDM).
- Conversely, gestational diabetes mellitus (GDM) does not demonstrate a causal effect on sarcopenia.
- These findings suggest that interventions targeting sarcopenia may be beneficial in GDM prevention strategies.
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