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Cytochemical studies of acid phosphatase in etching cells of boring sponges

Published online by Cambridge University Press:  11 May 2009

Shirley A. Pomponi
Shirley A. Pomponi
Affiliation:
University of Miami, Rosenstiel School of Marine and Atmospheric Science, Miami, Florida 33149
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Extract

Etching cells of boring sponges effect the excavation of calcium carbonate substrates by partial chemical dissolution. They are characterized by the same features found in active osteoclasts, the cells which effect bone resorption in vertebrates. These similarities include a region of numerous cell processes and a system of cytoplasmic bodies, vesicles, and vacuoles which are structurally connected with a tubular system and with extra-cellular channels (Pomponi, 1979). An extensive rough endoplasmic reticulum, Golgi complex, and lysosomes indicate that a lysosomal system is operative (Pomponi, 1979). The lysosomal system has been implicated as the primary mechanism in the destruction of calcined tissue by osteoclasts (Vaes, 1968; Hancox, 1972, Gothlin & Ericsson, 1976; Holtrop & King, 1977). Vaes (1968) proposed that acid hydrolases of lysosomes are active in the resorption of the organic matrix of bone.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 59 , Issue 3 , August 1979 , pp. 785 - 789
Copyright
Copyright © Marine Biological Association of the United Kingdom 1979

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