Adipokines and risk of rheumatoid arthritis: A two-sample multivariable Mendelian randomisation study

PLoS One. 2023 Jun 9;18(6):e0286981. doi: 10.1371/journal.pone.0286981. eCollection 2023.

Abstract

Adiponectin, leptin, and resistin are thought to be involved in the pathogenesis of rheumatoid arthritis (RA). However, the causal relationship between these adipokines and the risk for RA is unclear. We performed a range of two-sample Mendelian randomisation (MR) analyses to assess the causal effect of circulating adiponectin, leptin, and resistin on RA risk in European and East Asian individuals. Different sets of adiponectin-, leptin-, and resistin-related genetic variants were used as instruments for genetically determined adipokine levels. As body mass index (BMI) is a risk factor for RA and affects adipokine levels, multivariable MR was used to calculate the causal effect of each adipokine on RA risk taking BMI into account. Several MR analyses revealed no evidence of a causal relationship between circulating adiponectin, leptin, or resistin levels and RA risk in either Europeans or East Asians. Similarly, multivariable MR did not provide evidence of any causal effect of adiponectin, leptin, or resistin on RA risk when taking BMI into account. This MR study shows for the first time that genetically determined levels of adiponectin, leptin, or resistin do not have a direct causal effect on the risk of developing RA after adjustment for BMI.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipokines*
  • Adiponectin / genetics
  • Arthritis, Rheumatoid* / genetics
  • Arthritis, Rheumatoid* / pathology
  • Humans
  • Leptin / genetics
  • Resistin / genetics

Substances

  • Adipokines
  • Leptin
  • Resistin
  • Adiponectin

Grants and funding

C.M. from the Knut and Alice Wallenberg Foundation [https://kaw.wallenberg.org/en] and the Wallenberg Centre for Molecular and Translational Medicine at the University of Gothenburg, Sweden [https://www.gu.se/en/molecular-translational-medicine] as well as from the Swedish Society for Medical Research (S20-0109) [https://www.ssmf.se]. S.S.Z. is supported by a National Institute for Health Research Clinical Lectureship [https://www.nihr.ac.uk] and works in centres supported by Versus Arthritis (grant no. 21755, 21173, 21754 and 21755) [https://www.versusarthritis.org]. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.