en
Scientific article
English

Asymmetrical distribution of δ and PP cells in human pancreatic islets

Published inJournal of Endocrinology, vol. 229, no. 2, p. 123-132
Publication date2016
Abstract

The aim of this study was to evaluate the location of PP and δ cells in relation to the vascularization within human pancreatic islets. To this end, pancreas sections were analysed by immunofluorescence using antibodies against endocrine islet and endothelial cells. Staining in different islet areas corresponding to islet cells adjacent or not to peripheral or central vascular channels was quantified by computerized morphometry. As results, α, PP and δ cells were preferentially found adjacent to vessels. In contrast to α cells, which were evenly distributed between islet periphery and intraislet vascular channels, PP and δ cells had asymmetric and opposite distributions: PP staining was higher and somatostatin staining was lower in the islet periphery than in the area around intraislet vascular channels. Additionally, frequencies of PP and δ cells were negatively correlated in the islets. No difference was observed between islets from the head and the tail of the pancreas, and from type 2 diabetic and non-diabetic donors. In conclusion, the distribution of δ cells differs from that of PP cells in human islets, suggesting that vessels at the periphery and at the centre of islets drain different hormonal cocktails.

Keywords
  • Adolescent
  • Adult
  • Aged
  • Fluorescent Antibody Technique
  • Humans
  • Islets of Langerhans/cytology/metabolism
  • Middle Aged
  • Pancreatic Polypeptide/metabolism
  • Pancreatic Polypeptide-Secreting Cells/cytology/metabolism
  • Somatostatin/metabolism
  • Somatostatin-Secreting Cells/cytology/metabolism
  • Tissue Distribution
  • Young Adult
Citation (ISO format)
BARBIEUX, Charlotte et al. Asymmetrical distribution of δ and PP cells in human pancreatic islets. In: Journal of Endocrinology, 2016, vol. 229, n° 2, p. 123–132. doi: 10.1530/JOE-15-0542
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Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal0022-0795
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