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Autometallography for histochemical visualization of rat incisor polyanions with cuprolinic blue

P Lormee, S Lecolle, D Septier, D Le Denmat and M Goldberg

Laboratoire d'Histologie, Faculte de Chirurgie Dentaire, Montrouge, France.

Autometallography was applied to semi-thin sections of rat incisors fixed a solution of cuprolinic blue-aldehyde. The resulting reduction of silver ions to metallic silver amplifies the copper sulfide signal of the cationic dye. Silver grains were seen over the cell bodies of ameloblasts and odontoblasts but not over their processes. This was owing to the interaction of cuprolinic blue with the DNA and RNA of these cells. In the extracellular matrix, silver grains were unevenly distributed over the predentin, dentin, and forming enamel. The distal predentin near the mineralization front and a thin band of dentin located near the dentino-enamel junction displayed unexpectedly intense accumulation of silver grains, whereas all other portions of the extracellular matrix exhibited the distribution of glycosaminoglycans expected from previous studies. The present investigation constitutes a new application of autometallography to glycosaminoglycan histochemistry.

Volume 37, Issue 2, pp. 203-208, 02/01/1989
Copyright © 1989 by The Histochemical Society


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