T. Miya et al., PROSTAGLANDIN-E2 PARATHYROID HORMONE-INDUCED SUPPRESSION OF ALKALINE-PHOSPHATASE ACTIVITY IS MEDIATED BY PROTEIN-KINASE-C, International Journal of Biochemistry, 26(5), 1994, pp. 639-643
1. Bone resorptive factors, prostaglandin E2 and parathyroid hormone a
re shown to suppress alkaline phosphatase activity in a rat osteoblast
ic cell line. 2. Phorbol myristate acetate, but not dibutyryl cAMP or
calcium ionophore can suppress alkaline phosphatase activity. 3. The p
rotein kinase C inhibitors (H89, staurosporine) are able to block the
suppression of alkaline phosphatase activity induced by prostaglandin
E2 and parathyroid hormone. 4. These data suggest that protein kinase
C is involved in the inhibition of alkaline phosphatase activity induc
ed by prostaglandin E2 and parathyroid hormone.