Neurotensin is a lipid-induced gastrointestinal peptide associated with visceral adipose tissue inflammation in obesity

Research output: Contribution to journalArticle

Abstract

Neurotensin (NT) is a 13-amino acid peptide localized in the neuroendocrine cells of the small intestine, which promotes fat absorption and fatty acids translocation in response to lipid ingestion. NT-knock-out mice fed with a high-fat diet are protected from obesity, fatty liver, and the development of insulin-resistance. In humans, higher plasma levels of pro-NT, which is the stable circulating precursor of NT, predict obesity, type 2 diabetes (T2D), and cardiovascular disease. In obesity, the presence of visceral adipose tissue (VAT) inflammation leads to unfavorable metabolic outcomes and is associated with the development of T2D and non-alcoholic fatty liver disease (NAFLD). In this study, we investigated the relationship between plasma pro-NT levels and the presence of VAT inflammation in biopsies from 40 morbidly obese subjects undergoing bariatric surgery. We demonstrated that higher proNT levels are significantly associated with greater macrophages infiltration, HIF-1α, WISP-1, and UNC5B expression in VAT (all p < 0.01) due to the diagnosis of T2D and NAFLD. The overall results show that, in obesity, pro-NT is a biomarker of VAT inflammation and insulin-resistance. Additionally, NT may be involved in the development of dysmetabolic conditions likely mediated by increased gut fat absorption and the presence of a proinflammatory milieu in the adipose tissue.

Details

Authors
  • Ilaria Barchetta
  • Flavia Agata Cimini
  • Danila Capoccia
  • Laura Bertoccini
  • Valentina Ceccarelli
  • Caterina Chiappetta
  • Frida Leonetti
  • Claudio Di Cristofano
  • Gianfranco Silecchia
  • Marju Orho-Melander
  • Olle Melander
  • Maria Gisella Cavallo
Organisations
External organisations
  • Sapienza University of Rome
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Endocrinology and Diabetes

Keywords

  • Adipose tissue inflammation, Lipids, Obesity, Proneurotensin
Original languageEnglish
Article number526
JournalNutrients
Volume10
Issue number4
Publication statusPublished - 2018 Apr 23
Publication categoryResearch
Peer-reviewedYes