RSPO3 impacts body fat distribution and regulates adipose cell biology in vitro

Nellie Y Loh, JE, Minchin, Katherine E Pinnick, Manu Verma, Marijana Todorčević, Nathan Denton, Julia S El-Sayed Moustafa, John P Kemp, Celia L Gregson, David Evans, Matt J Neville, Kerrin S Small, Mark I McCarthy, Anubha Mahajan, John F Rawls, Frederik Karpe*, Constantinos Christodoulides*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

Fat distribution is an independent cardiometabolic risk factor. However, its molecular and cellular underpinnings remain obscure. Here we demonstrate that two independent GWAS signals at RSPO3, which are associated with increased body mass index-adjusted waist-to-hip ratio, act to specifically increase RSPO3 expression in subcutaneous adipocytes. These variants are also associated with reduced lower-body fat, enlarged gluteal adipocytes and insulin resistance. Based on human cellular studies RSPO3 may limit gluteofemoral adipose tissue (AT) expansion by suppressing adipogenesis and increasing gluteal adipocyte susceptibility to apoptosis. RSPO3 may also promote upper-body fat distribution by stimulating abdominal adipose progenitor (AP) proliferation. The distinct biological responses elicited by RSPO3 in abdominal versus gluteal APs in vitro are associated with differential changes in WNT signalling. Zebrafish carrying a nonsense rspo3 mutation display altered fat distribution. Our study identifies RSPO3 as an important determinant of peripheral AT storage capacity.
Original languageEnglish
Article number2797
Number of pages15
JournalNature Communications
Volume(2020) 11
DOIs
Publication statusPublished - 3 Jun 2020

Keywords

  • adipose
  • FAT DISTRIBUTION
  • WNT
  • human
  • RSPO3
  • WHRadjBMI

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