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Goldstein, N.* ; Kezerle, Y.* ; Gepner, Y.* ; Haim, Y.* ; Pecht, T.* ; Gazit, R.* ; Polischuk, V.* ; Liberty, I.F.* ; Kirshtein, B.* ; Shaco-Levy, R.* ; Blüher, M. ; Rudich, A.*

Higher mast cell accumulation in human adipose tissues defines clinically favorable obesity sub-phenotypes.

Cells 9:1508 (2020)
Publ. Version/Full Text DOI
Open Access Gold
Creative Commons Lizenzvertrag
The identification of human obesity sub-types may improve the clinical management of patients with obesity and uncover previously unrecognized obesity mechanisms. Here, we hypothesized that adipose tissue (AT) mast cells (MC) estimation could be a mark for human obesity sub-phenotyping beyond current clinical-based stratifications, both cross-sectionally and prospectively. We estimated MC accumulation using immunohistochemistry and gene expression in abdominal visceral AT (VAT) and subcutaneous (SAT) in a human cohort of 65 persons with obesity who underwent elective abdominal (mainly bariatric) surgery, and we validated key results in two clinically similar, independent cohorts (n= 33,n= 56). AT-MC were readily detectable by immunostaining for either c-kit or tryptase and by assessing the gene expression of KIT (KIT Proto-Oncogene, Receptor Tyrosine Kinase), TPSB2 (tryptase beta 2), and CMA1 (chymase 1). Participants were characterized as VAT-MC(low)if the expression of both CMA1 and TPSB2 was below the median. Higher expressers of MC genes (MChigh) were metabolically healthier (lower fasting glucose and glycated hemoglobin, with higher pancreatic beta cell reserve (HOMA-beta), and lower triglycerides and alkaline-phosphatase) than people with low expression (MClow). Prospectively, higher MC accumulation in VAT or SAT obtained during surgery predicted greater postoperative weight-loss response to bariatric surgery. Jointly, high AT-MC accumulation may be used to clinically define obesity sub-phenotypes, which are associated with a "healthier" cardiometabolic risk profile and a better weight-loss response to bariatric surgery.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Obesity ; Type 2 Diabetes ; Bariatric Surgery ; Adipose Tissue ; Mast Cells; Fibrosis; Adipogenesis; Inflammation; Deficiency; Liver; Link; Pcr
ISSN (print) / ISBN 2073-4409
e-ISSN 2073-4409
Journal Cells
Quellenangaben Volume: 9, Issue: 6, Pages: , Article Number: 1508 Supplement: ,
Publisher MDPI
Publishing Place Basel
Institute(s) Helmholtz Institute for Metabolism, Obesity and Vascular Research (HI-MAG)