Abstract:
:The possible role of carbonic anhydrase in bone resorption induced by prostaglandin E2 (PGE2) was studied using an in vitro neonatal mouse calvarial culture system. PGE2 (10(-6) M) was effective in stimulating resorption, as assessed by calcium release into culture media. This enhanced resorption was accompanied by significant increases in calvarial carbonic anhydrase activity over control values at 48 and 96 h. At 48 h, bones treated with PGE2 had 20% more carbonic anhydrase activity than controls. By 96 h, treated bones contained 79% more carbonic anhydrase activity than controls. PGE2-induced bone resorption was inhibited by the carbonic anhydrase inhibitor acetazolamide in a dose-dependent fashion from 10(-5) to 10(-4) M, with 77% inhibition observed at 10(-4) M. The acetazolamide analogue CL 13,850 (N-t-butylacetazolamide), which does not inhibit carbonic anhydrase, failed to inhibit PGE2-induced resorption. These results are consistent with the hypothesis that carbonic anhydrase is a necessary component of the osteoclastic bone resorptive mechanism.
journal_name
Pharmacologyjournal_title
Pharmacologyauthors
Hall GE,Kenny ADdoi
10.1159/000138088subject
Has Abstractpub_date
1985-01-01 00:00:00pages
339-47issue
6eissn
0031-7012issn
1423-0313journal_volume
30pub_type
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