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. 2014 Apr 22;5:57. doi: 10.3389/fendo.2014.00057

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Copyright © 2014 Proshchina, Krivova, Barabanov and Saveliev.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Different types of connectivity between nervous system structures and pancreatic fetal and adult islets. Bar = 50 mcm. (A) Autonomic ganglion (no endocrine cells) in human pancreas. NSE (blue) and S-100 (red) double staining. (B) Neuro-insular complexes type Ia (few endocrine cells in ganglion, arrow heads) and neuro-insular complex type I (the connection of the ganglion and the islet, arrow). NSE (blue) and insulin (red) double staining. (C,D) Neuro-insular complexes type I at various stages of human development (the connection of the ganglion and the islet). Insulin (blue) and S-100 (red) double staining. (E–G) Neuro-insular complex type IIa (single or a few endocrine cells associated with a bundle of nerve fibers). Insulin (blue) and S-100 (red) double staining. (H) S100-positive cells on the margin and within the islet. Note two cells with processes on the islet margin. S-100 staining.