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  • Title: Tartrate-resistant acid phosphatase in bone and cartilage following decalcification and cold-embedding in plastic.
    Author: Cole AA, Walters LM.
    Journal: J Histochem Cytochem; 1987 Feb; 35(2):203-6. PubMed ID: 3540104.
    Abstract:
    Tartrate-resistant acid phosphatase (TRAP) has been proposed as a cytochemical marker for osteoclasts. We have developed an improved technique for the localization of TRAP in rat and mouse bone and cartilage. This procedure employs JB-4 plastic as the embedding medium, permits decalcification, and results in improved morphology compared with frozen sections. Peritoneal lavage cells were used to determine the appropriate isomer and concentration of tartrate necessary for inhibition of tartrate-sensitive acid phosphatase. After incubation in medium containing 50 mM L(+)-tartaric acid, osteoclasts and chondroclasts were heavily stained with reaction product. On the basis of their relative sensitivity to tartrate inhibition, three populations of mononuclear cells could also be distinguished. These three populations may represent: heavily stained osteoclast/chondroclast precursors; sparsely stained osteoblast-like cells lining the bone surface; and unstained cells of monocyte-macrophage lineage. Our results are consistent with the use of TRAP as a histochemical marker for study of the osteoclast.
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