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Open AccessBrief Report

Neurotensin Is a Lipid-Induced Gastrointestinal Peptide Associated with Visceral Adipose Tissue Inflammation in Obesity

1
Department of Experimental Medicine, Sapienza University of Rome, 00161 Rome, Italy
2
Department of Medical-Surgical Sciences and Bio-Technologies, Sapienza University of Rome, 00161 Rome, Italy
3
Department of Clinical Sciences, Lund University, 20502 Malmoe, Sweden
*
Author to whom correspondence should be addressed.
Nutrients 2018, 10(4), 526; https://doi.org/10.3390/nu10040526
Received: 28 March 2018 / Revised: 16 April 2018 / Accepted: 20 April 2018 / Published: 23 April 2018
(This article belongs to the Special Issue Inflammation- An Ancient Battle. What are the Roles of Nutrients?)
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. View Full-Text
Keywords: proneurotensin; adipose tissue inflammation; obesity; lipids proneurotensin; adipose tissue inflammation; obesity; lipids
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Barchetta, I.; Cimini, F.A.; Capoccia, D.; Bertoccini, L.; Ceccarelli, V.; Chiappetta, C.; Leonetti, F.; Di Cristofano, C.; Silecchia, G.; Orho-Melander, M.; Melander, O.; Cavallo, M.G. Neurotensin Is a Lipid-Induced Gastrointestinal Peptide Associated with Visceral Adipose Tissue Inflammation in Obesity. Nutrients 2018, 10, 526.

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