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Systemic Hypoxia Increases the Expression of DPP4 in Preadipocytes of Healthy Human Participants

Helena H Chowdhury1,2, Jelena Velebit1,2, Igor B Mekjavic3

  • 1Laboratory for Neuroendocrinology - Molecular Cell Physiology, Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, Ljubljana, Slovenia.

Experimental and Clinical Endocrinology & Diabetes : Official Journal, German Society of Endocrinology [And] German Diabetes Association
|September 27, 2017
PubMed

Insights

Hypoxia significantly increases dipeptidyl peptidase 4 (DPP4) expression in human fat cells, suggesting DPP4 may indicate tissue hypoxia in obesity. Inactivity alone had no effect.

Area of Science:

  • Biochemistry
  • Endocrinology
  • Metabolic Research

Background:

  • Dipeptidyl peptidase 4 (DPP4) is a protein linked to incretin metabolism.
  • DPP4 plays a role in insulin secretion and is a therapeutic target for type 2 diabetes.
  • Understanding DPP4 regulation in adipose tissue is crucial for metabolic health.

Purpose of the Study:

  • To investigate the effects of hypoxia and physical inactivity on DPP4 expression in human adipose tissue.
  • To determine if DPP4 can serve as a biomarker for tissue hypoxia.

Main Methods:

  • Human adipose tissue biopsies were collected from 12 normal-weight males.
  • Preadipocytes were isolated and exposed to experimental conditions simulating hypoxia and inactivity.
  • DPP4 expression levels were measured under different experimental conditions.

Main Results:

  • Hypoxia significantly increased DPP4 expression in isolated human preadipocytes.
  • Physical inactivity alone did not significantly affect DPP4 expression.
  • Combined effects were not explicitly detailed but hypoxia was the primary driver.

Conclusions:

  • DPP4 expression in adipose tissue is sensitive to hypoxic conditions.
  • DPP4 may serve as an indirect marker for monitoring tissue hypoxia.
  • Findings are relevant to understanding metabolic alterations in conditions like obesity.

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