Abstract
We report the effects of tetracycline analogues on cytosolic Ca2+ transients resulting from application of ionic nickel (Ni2+), a potent surrogate agonist of the osteoclast Ca2+ “receptor”. Preincubation with minocycline (1 mg/l) or a chemically modified tetracycline, 4-dedimethyl-aminotetracycline (CMT-1) (1 or 10 mg/l), resulted in a significant attenuation of the magnitude of the cytosolic [Ca2+] response to an application of 5 mM-[Ni2+]. Preincubation with doxycycline (1 or 10 mg/l) failed to produce similar results. In addition, application of minocycline alone (0.1–100 mg/l) resulted in a 3.5-fold elevation of cytosolic [Ca2+]. The results suggest a novel action of tetracyclines on the osteoclast Ca2+ “receptor”.
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Bax, C.M.R., Shankar, V.S., Towhidul Alam, A.S.M. et al. Tetracyclines modulate cytosolic Ca2+ responses in the osteoclast associated with “Ca2+ receptor” activation. Biosci Rep 13, 169–174 (1993). https://doi.org/10.1007/BF01149961
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DOI: https://doi.org/10.1007/BF01149961