Low lysophosphatidylcholine induces skeletal muscle myopathy that is aggravated by high-fat diet feeding

Details

• Alternative Title:
  FASEB J
• Personal Author:
  Ferrara, Patrick J. ; Verkerke, Anthony R.P. ; Maschek, J. Alan ; Shahtout, Justin L. ; Siripoksup, Piyarat ; Eshima, Hiroaki ; Johnson, Jordan M. ; Petrocelli, Jonathan J. ; Mahmassani, Ziad S. ; Green, Thomas D. ; McClung, Joseph M. ; Cox, James E. ; Drummond, Micah J. ; Funai, Katsuhiko
• Description:
  Obesity alters skeletal muscle lipidome and promotes myopathy, but it is unknown whether aberrant muscle lipidome contributes to the reduction in skeletal muscle contractile force-generating capacity. Comprehensive lipidomic analyses of mouse skeletal muscle revealed a very strong positive correlation between the abundance of lysophosphatidylcholine (lyso-PC), a class of lipids that is known to be downregulated with obesity, with maximal tetanic force production. The level of lyso-PC is regulated primarily by lyso-PC acyltransferase 3 (LPCAT3), which acylates lyso-PC to form phosphatidylcholine. Tamoxifen-inducible skeletal muscle-specific overexpression of LPCAT3 (LPCAT3-MKI) was sufficient to reduce muscle lyso-PC content in both standard chow diet- and high-fat diet (HFD)-fed conditions. Strikingly, the assessment of skeletal muscle force-generating capacity ex vivo revealed that muscles from LPCAT3-MKI mice were weaker regardless of diet. Defects in force production were more apparent in HFD-fed condition, where tetanic force production was 40% lower in muscles from LPCAT3-MKI compared to that of control mice. These observations were partly explained by reductions in the cross-sectional area in type IIa and IIx fibers, and signs of muscle edema in the absence of fibrosis. Future studies will pursue the mechanism by which LPCAT3 may alter protein turnover to promote myopathy.
• Subjects:
  Article Diabetes Lysophospholipid Myopathy Skeletal Muscle
• Source:
  FASEB J. 35(10):e21867
• Pubmed ID:
  34499764
• Pubmed Central ID:
  PMC8439548
• Document Type:
  Journal Article
• Funding:
  R56 AG050781/AG/NIA NIH HHSUnited States/ ; S10 OD016232/OD/NIH HHSUnited States/ ; R03 DK109888/DK/NIDDK NIH HHSUnited States/ ; R01 AG050781/AG/NIA NIH HHSUnited States/ ; R01 HL125695/HL/NHLBI NIH HHSUnited States/ ; R21 AG063077/AG/NIA NIH HHSUnited States/ ; P30 DK020579/DK/NIDDK NIH HHSUnited States/ ; R01 DK107397/DK/NIDDK NIH HHSUnited States/ ; U54 DK110858/DK/NIDDK NIH HHSUnited States/ ; S10 OD021505/OD/NIH HHSUnited States/
• Volume:
  35
• Issue:
  10
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:387b260e4cd865414427e71f188cc76533532b7390cdc93d0a8c07b70b3fb1a6
• Download URL:
  https://stacks.cdc.gov/view/cdc/110264/cdc_110264_DS1.pdf
• File Type:
  [PDF - 1.40 MB ]