Cytochemical Demonstration of Phosphatases in Membrane-recycling Structures of Endodermal Cells

Overview

Journal Histochemistry

Specialty Biochemistry

Date 1987 Jan 1

PMID 3034836

Citations 1

Authors

H W Volk

P Kugler

Affiliations

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Abstract

We applied cytochemical procedures to demonstrate the presence of acid and alkaline phosphatase in the visceral yolk-sac endoderm of rats using frozen, aldehyde-fixed tissue with cerium as the capture agent. This procedure allowed more detailed topochemical localization than was possible using unfrozen tissue or with lead as the capture agent. Acid phosphatase was found to be present in lysosomes as well as in a small number of apical canaliculi, which are thought to be recycling structures of the cell membranes in endodermal cells. Reaction products of alkaline phosphatase were observed on the outer surface of apical, lateral, and basal cell membranes. In addition, some apical vacuoles contained alkaline phosphatase, and more apical canaliculi were positive for alkaline phosphatase than for acid phosphatase. However, most of the apical canaliculi were negative for both enzymes. It is suggested that acid and alkaline phosphatase are taken up by different numbers of apical canaliculi during the detachment of apical canaliculi from lysosomes and resorption vacuoles.

Citing Articles

Cytochrome oxidase histochemistry in the rat hippocampus. A quantitative methodological study.

Kugler P, Vogel S, Volk H, SCHIEBLER T Histochemistry. 1988; 89(3):269-75.

PMID: 2841260 DOI: 10.1007/BF00493151.

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