The Kurume Medical Journal
Online ISSN : 1881-2090
Print ISSN : 0023-5679
ISSN-L : 0023-5679
The Vitamin A-Storing Cells in the Human and Rat Pancreas
NAOKI IKEJIRI
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1990 Volume 37 Issue 2 Pages 67-81

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Abstract

Vitamin A-storing cells with lipid droplets and fluorescence characteristic of vitamin A were observed in the normal human and rat pancreas, using light, fluorescence, and electron microscopy. Vitamin A-storing cells in the normal human pancreas, as well as in the rat pancreas, were located predominantly in a perivascular area, and had lipid droplets with a fluorescence characteristic of vitamin A, Pancreatic vitamin A-storing cells had more numerous jipid droplets and more distinct fluorescence of vitamin A in vitamin A-loaded rats than in normal rats. In the rat, hepatic vitamin A-storing cells contained significantly more lipid droplets and had more distinct vitamin A fluorescence than pancreatic vitamin A-storing cells. Pancreatic sections from human subjects with chronic alcoholic pancreatitis revealed abun-dant vitamin A-storing cells surrounded by collagen fibers in an area of fi-brosis. These results indicate that vitamin A-storing cells are widely distributed in the normal human and rat pancreas, although pancreatic vitamin A-storing cells have less storage capacity for vitamin A than do hepatic cells. Vitamin A-storing cells, as well as fibroblasts, may participate in the development of pancreatic fibrosis in chronic alcoholic pancreatitis, similar to the way hepatic vitamin A-storing cells participate in hepatic fibrosis.

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