Myobolites: muscle-derived metabolites with paracrine and systemic effects

Curr Opin Pharmacol. 2017 Jun;34:15-20. doi: 10.1016/j.coph.2017.03.007. Epub 2017 Apr 22.

Abstract

Intracellular metabolism in skeletal muscle has been studied for more than a century and is the stuff of textbooks. In contrast, the extracellular secretion of metabolites by muscle cells, and their effects on non-muscle cells near or far, has been investigated much less extensively. Here, we describe a number of cases in which striated muscle secretes a metabolite that elicits complex responses in other cells or tissues, with involvements in normal physiology as well as obesity, type II diabetes, and cardiac remodeling. We focus on two recently identified secreted catabolic products of branched chain amino acid breakdown, β-aminoisobutyric acid and 3-hydroxyisobutyrate, and discuss common themes of inter-cellular signaling pathways driven by secreted metabolites.

Publication types

  • Review

MeSH terms

  • Adenosine / physiology
  • Adipocytes / metabolism
  • Aminoisobutyric Acids / metabolism
  • Animals
  • Cardiomegaly / metabolism
  • Cyclic AMP / metabolism
  • Fatty Acids / metabolism
  • Fibrosis
  • Humans
  • Liver / metabolism
  • Muscle, Skeletal / metabolism*
  • Muscle, Skeletal / physiology
  • Myocardium / metabolism
  • Myocardium / pathology
  • Vasodilation

Substances

  • Aminoisobutyric Acids
  • Fatty Acids
  • Cyclic AMP
  • Adenosine
  • 3-aminoisobutyric acid