Paracrine Potential of Adipose Stromal Vascular Fraction Cells to Recover Hypoxia-Induced Loss of Cardiomyocyte Function

Biotechnol Bioeng. 2019 Jan;116(1):132-142. doi: 10.1002/bit.26824. Epub 2018 Oct 27.

Abstract

Cell-based therapies show promising results in cardiac function recovery mostly through paracrine-mediated processes (as angiogenesis) in chronic ischemia. In this study, we aim to develop a 2D (two-dimensional) in vitro cardiac hypoxia model mimicking severe cardiac ischemia to specifically investigate the prosurvival paracrine effects of adipose tissue-derived stromal vascular fraction (SVF) cell secretome released upon three-dimensional (3D) culture. For the 2D-cardiac hypoxia model, neonatal rat cardiomyocytes (CM) were cultured for 5 days at < 1% (approaching anoxia) oxygen (O2 ) tension. Typical cardiac differentiation hallmarks and contractile ability were used to assess both the cardiomyocyte loss of functionality upon anoxia exposure and its possible recovery following the 5-day-treatment with SVF-conditioned media (collected following 6-day-perfusion-based culture on collagen scaffolds in either normoxia or approaching anoxia). The culture at < 1% O 2 for 5 days mimicked the reversible condition of hibernating myocardium with still living and poorly contractile CM (reversible state). Only SVF-medium conditioned in normoxia expressing a high level of the prosurvival hepatocyte-growth factor (HGF) and insulin-like growth factor (IGF) allowed the partial recovery of the functionality of damaged CM. The secretome generated by SVF-engineered tissues showed a high paracrine potential to rescue the nonfunctional CM, therefore resulting in a promising patch-based treatment of specific low-perfused areas after myocardial infarction.

Keywords: cardiomyocyte; hypoxia; paracrine-mediated effects; stromal vascular fraction.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipose Tissue / cytology*
  • Animals
  • Animals, Newborn
  • Cell- and Tissue-Based Therapy / methods*
  • Cells, Cultured
  • Models, Theoretical
  • Myocardial Infarction / therapy*
  • Myocytes, Cardiac / physiology*
  • Paracrine Communication*
  • Rats
  • Stromal Cells / physiology*