Effects of lead on osteoclast-like cell formation in mouse bone marrow cell cultures
| Autor: | W. Xue-Ya, Hiroko Komiyama, A. Miyanishi, M. Nagai, Hiroshi Kozuka, M. Takata, Tatsuro Miyahara, S. Takata, K. Yokoyama, Y. Kanamoto, M. Matsumoto |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Calcitonin
Male medicine.medical_specialty Endocrinology Diabetes and Metabolism Indomethacin Osteoclasts Parathyroid hormone chemistry.chemical_element Bone Marrow Cells Mice Inbred Strains Calcium Dinoprostone Mice Endocrinology Bone Marrow Osteoclast 1-Methyl-3-isobutylxanthine Internal medicine Cyclic AMP medicine Animals Orthopedics and Sports Medicine Prostaglandin E2 Receptor Dibenz(b f)(1 4)oxazepine-10(11H)-carboxylic acid 8-chloro- 2-acetylhydrazide Calcimycin Cells Cultured Cell Nucleus Chemistry Cell Differentiation medicine.anatomical_structure Lead Verapamil Parathyroid Hormone Cell culture Dideoxyadenosine Intracellular medicine.drug |
| Zdroj: | Calcified Tissue International. 54:165-169 |
| ISSN: | 1432-0827 0171-967X |
| DOI: | 10.1007/bf00296069 |
| Popis: | To examine an effect of lead (Pb) on the process of osteoclast-like cell formation from its progenitors, we used a mouse bone marrow culture system in which osteoclast-like multinucleated cells (MNCs) were formed in response to bone-resorbing agents. In a 9-day culture period, Pb dose-dependently stimulated MNC formation over the concentration range 2-10 microM, whereas at 40 microM Pb, MNC formation declined. In an 11-day culture period, MNC formation reached a maximum at 5 microM Pb and decreased with increasing concentration of Pb at 10-40 microM. Pb-stimulated MNC formation was inhibited by both indomethacin and SC19220, an antagonist of prostaglandin E2 (PGE2) receptor. Pb stimulated the production of PGE2 in marrow cell cultures, suggesting that Pb-stimulated MNC formation is dependent on the production of PGE2. 3-Isobutyl-1-methylxanthine potentiated Pb-stimulated MNC formation and 2',5'-dideoxyadenosine, an inhibitor of adenylate cyclase, inhibited it. A calcium ionophore A23187 increased Pb-induced MNC formation and verapamil, a calcium channel blocker, depressed it. It is possible that a PGE2-induced increase in the levels of cyclic adenosine 3',5'-monophosphate (cAMP) and calcium ions in marrow cells is involved in Pb-induced MNC formation. Pb and parathyroid hormone showed a synergistic stimulation on MNC formation. From these results, Pb is thought to induce osteoclast-like cell formation by a mechanism involving PGE2 which increases the intracellular levels of cAMP and calcium ions. |
| Databáze: | OpenAIRE |
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