Frontiers in Cardiovascular Medicine (Feb 2023)

Fecal microbiome transplantation and tributyrin improves early cardiac dysfunction and modifies the BCAA metabolic pathway in a diet induced pre-HFpEF mouse model

  • Jomana Hatahet,
  • Tyler M. Cook,
  • Raiza R. Bonomo,
  • Nadia Elshareif,
  • Chaitanya K. Gavini,
  • Chaitanya K. Gavini,
  • Chelsea R. White,
  • Jason Jesse,
  • Virginie Mansuy-Aubert,
  • Virginie Mansuy-Aubert,
  • Gregory Aubert,
  • Gregory Aubert

DOI
https://doi.org/10.3389/fcvm.2023.1105581
Journal volume & issue
Vol. 10

Abstract

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More than 50% of patients with heart failure present with heart failure with preserved ejection fraction (HFpEF), and 80% of them are overweight or obese. In this study we developed an obesity associated pre-HFpEF mouse model and showed an improvement in both systolic and diastolic early dysfunction following fecal microbiome transplant (FMT). Our study suggests that the gut microbiome-derived short-chain fatty acid butyrate plays a significant role in this improvement. Cardiac RNAseq analysis showed butyrate to significantly upregulate ppm1k gene that encodes protein phosphatase 2Cm (PP2Cm) which dephosphorylates and activates branched-chain α-keto acid dehydrogenase (BCKDH) enzyme, and in turn increases the catabolism of branched chain amino acids (BCAAs). Following both FMT and butyrate treatment, the level of inactive p-BCKDH in the heart was reduced. These findings show that gut microbiome modulation can alleviate early cardiac mechanics dysfunction seen in the development of obesity associated HFpEF.

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