An insight into the causal relationship between sarcopenia-related traits and venous thromboembolism: A mendelian randomization study

PLoS One. 2024 May 16;19(5):e0303148. doi: 10.1371/journal.pone.0303148. eCollection 2024.

Abstract

Background: As a geriatric syndrome, sarcopenia has a high prevalence in the old population and represents an impaired state of health with adverse health outcomes. A strong clinical interest in its relationship with venous thromboembolism (VTE), which is a complex trait disease with a heterogeneous annual incidence rate in different countries, has emerged. The relationship between sarcopenia and venous thromboembolism has been reported in observational studies but the causality from sarcopenia to VTE remained unclarified. We aimed to assess the causal effect of sarcopenia on the risk of VTE with the two-sample Mendelian randomization (MR) method.

Methods: Two sets of single-nucleotide polymorphisms (SNPs), derived from two published genome-wide association study (GWAS) meta-analyses and genetically indexing muscle weakness and lean muscle mass separately, were pooled into inverse variance weighted (IVW), weighted median and MR-Egger analyses.

Results: No evidence was found for the causal effect of genetically predicted muscle weakness (IVW: OR = 0.90, 95% CI = 0.76-1.06, p = 0.217), whole body lean mass (IVW: OR = 1.01, 95% CI = 0.87-1.17, p = 0.881) and appendicular lean mass (IVW: OR = 1.13, 95% CI = 0.82-1.57, p = 0.445) on the risk of VTE. However, both genetically predicted whole-body lean mass and appendicular lean mass can causally influence diabetes mellitus (IVW of whole-body lean mass: OR = 0.87, 95% CI = 0.78-0.96, p = 0.008; IVW of appendicular lean mass: OR = 0.71, 95% CI = 0.54-0.94, p = 0.014) and hypertension (IVW of whole-body lean mass: OR = 0.92, 95% CI = 0.87-0.98, p = 0.007; IVW of appendicular lean mass: OR = 0.84, 95% CI = 0.73-0.96, p = 0.013).

Conclusions: Genetically predicted sarcopenia does not causally influence VTE directly, but it might still have an indirect effect on VTE incidence via diabetes mellitus and hypertension.

MeSH terms

  • Genome-Wide Association Study*
  • Humans
  • Mendelian Randomization Analysis*
  • Polymorphism, Single Nucleotide*
  • Risk Factors
  • Sarcopenia* / complications
  • Sarcopenia* / epidemiology
  • Sarcopenia* / genetics
  • Venous Thromboembolism* / epidemiology
  • Venous Thromboembolism* / etiology
  • Venous Thromboembolism* / genetics

Grants and funding

Z.Y. SDYWZGKCJHLH2023096 to Zhiwei Yao. The joint initiation project of scientific and technological innovation for Shandong Province medical staff. There is no URL for the above funder. No, this study was independent of any sponsors or funders.