title: Tetracyclines inhibit parathyroid hormone-induced bone resorption in organ culture.
abstract: Several tetracyclines (minocycline, doxycycline, tetracycline), in levels approximating physiologic concentrations, were found to inhibit parathyroid hormone-induced bone resorption in organ culture; the specificity of this effect was demonstrated by comparison with other (non-tetracycline) types of antibiotics. The ability of tetracyclines to inhibit bone resorption is consistent with the recent proposal by Golub et al. that these antibiotics can inhibit mammalian collagenolytic enzymes by a mechanism unrelated to the drug's antibacterial efficacy, a property which could be therapeutically useful in diseases characterized by excessive collagen breakdown.
mesh_terms: D000818:Animals; D001862:Bone Resorption / Q000187:drug effects*; D001842:Bone and Bones / Q000196:embryology / Q000502:physiology*; D002118:Calcium / Q000378:metabolism; D003094:Collagen / Q000378:metabolism; D004318:Doxycycline / Q000494:pharmacology; D005260:Female; D008911:Minocycline / Q000494:pharmacology; D009924:Organ Culture Techniques; D010281:Parathyroid Hormone / Q000037:antagonists & inhibitors*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D013752:Tetracycline / Q000494:pharmacology; D013754:Tetracyclines / Q000494:pharmacology*
chemical_list: D010281:Parathyroid Hormone; D013754:Tetracyclines; D003094:Collagen; D013752:Tetracycline; D008911:Minocycline; D004318:Doxycycline; D002118:Calcium