Systemic and vascular inflammation in an in-vitro model of central obesity

PLoS One. 2018 Feb 13;13(2):e0192824. doi: 10.1371/journal.pone.0192824. eCollection 2018.

Abstract

Metabolic disorders due to over-nutrition are a major global health problem, often associated with obesity and related morbidities. Obesity is peculiar to humans, as it is associated with lifestyle and diet, and so difficult to reproduce in animal models. Here we describe a model of human central adiposity based on a 3-tissue system consisting of a series of interconnected fluidic modules. Given the causal link between obesity and systemic inflammation, we focused primarily on pro-inflammatory markers, examining the similarities and differences between the 3-tissue model and evidence from human studies in the literature. When challenged with high levels of adiposity, the in-vitro system manifests cardiovascular stress through expression of E-selectin and von Willebrand factor as well as systemic inflammation (expressing IL-6 and MCP-1) as observed in humans. Interestingly, most of the responses are dependent on the synergic interaction between adiposity and the presence of multiple tissue types. The set-up has the potential to reduce animal experiments in obesity research and may help unravel specific cellular mechanisms which underlie tissue response to nutritional overload.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adiposity
  • Albumins / biosynthesis
  • Animals
  • Biomarkers / metabolism
  • Bioreactors
  • Coculture Techniques / methods
  • Hep G2 Cells
  • Human Umbilical Vein Endothelial Cells
  • Humans
  • In Vitro Techniques
  • Inflammation / complications
  • Inflammation / physiopathology*
  • Inflammation Mediators / physiology
  • Intra-Abdominal Fat / physiopathology
  • Lab-On-A-Chip Devices
  • Lipids / biosynthesis
  • Models, Biological*
  • Obesity, Abdominal / complications
  • Obesity, Abdominal / physiopathology*
  • Vasculitis / complications
  • Vasculitis / physiopathology*

Substances

  • Albumins
  • Biomarkers
  • Inflammation Mediators
  • Lipids

Grants and funding

The work leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement 304961 (ReLiver). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.