The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Cell signaling and estrogens in female rat osteoblasts: A possible involvement of unconventional nonnuclear receptors
Abstract
Estrogen deficiency is associated with bone loss, and estrogen replacement is an effective treatment of this osteoporotic process. This study examines the early (5–120 s) effects of 17β-estradiol on the intracellular calcium and phospholipid metabolism in confluent female rat osteoblasts. The cytosolic free Ca2+ concentration ([Ca2+]i) was determined using fura-2/AM as Ca2+ probe. Cells were labeled with myo-[2-3H]inositol or [14C]arachidonic acid for inositol or lipid determination. Inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG) production were determined by either mass measurement or anion-exchange chromatography or by thin-layer chromatography, respectively. 17β-Estradiol (1 pM to 1 nM) increased [Ca2+]i in a biphasic manner within 10 s via Ca2+ influx from the extracellular milieu, as shown by the effects of the calcium chelator EGTA and the Ca2+ channel blockers nifedipine and verapamil, and via Ca2+ mobilization from the endoplasmic reticulum (ER), as shown by the effects of thapsigargin. 17β-Estradiol (1 pM to 1 nM) induced a biphasic and concomitant increase in IP3 and DAG formation. Estradiol immobilized on bovine serum albumin (BSA) [E-(O-carboxymethyl)oxime BSA] and its derivative (O-carboxymethyl)oxime rapidly increased ([Ca2+]i, IP3, and DAG and were full agonists, although they were less potent than the free estradiol. They had the same action time course and acted via Ca2+ influx and Ca2+ mobilization from ER. Tamoxifen, a potent inhibitor of genomic steroid responses, did not block the rapid increase in Ca2+, IP3, and DAG induced by estradiol. Finally, inhibitor of phospholipase C (neomycin) and pertussis toxin abolished the effects of 17β-estradiol on IP3 and DAG formation. These results suggest that female rat osteoblasts bear non-genomic unconventional cell surface receptors for estradiol, belonging to the class of the membrane receptors coupled to a phospholipase C via a pertussis toxin-sensitive G protein.
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Multiple Actions of Steroid Hormones—A Focus on Rapid, Nongenomic Effects
Falkenstein, E., Tillmann, H.-C., Christ, M., Feuring, M., & Wehling, M. (2000) · Pharmacological Reviews · doi:10.1016/s0031-6997(24)01468-6 · Cited by 991
In vitro molecular mechanisms of bisphenol A action.
Wetherill, Y. B., Akingbemi, B. T., Kanno, J., McLachlan, J. A., Nadal, A., Sonnenschein, C., Watson, C. S., Zoeller, R. T., & Belcher, S. M. (2007) · Reproductive Toxicology · doi:10.1016/j.reprotox.2007.05.010 · Cited by 920
Aronica, S. M., Kraus, W. L., & Katzenellenbogen, B. S. (1994) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.91.18.8517 · Cited by 670
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LÖSEL, R. M., FALKENSTEIN, E., FEURING, M., SCHULTZ, A., TILLMANN, H.-C., ROSSOL-HASEROTH, K., & WEHLING, M. (2003) · Physiological Reviews · doi:10.1152/physrev.00003.2003 · Cited by 561
Non-genomic actions of androgens
Foradori, C. D., Weiser, M. J., & Handa, R. J. (2008) · Frontiers in Neuroendocrinology · doi:10.1016/j.yfrne.2007.10.005 · Cited by 493
Metadata
- Authors
- Dr. Lieberherr, M., Grosse, B., Kachkache, M., & Balsan, S.
- Venue
- Journal of Bone and Mineral Research
- Publisher
- Oxford University Press (OUP)
- Published
- 1993-11-01
- Volume
- 8
- Issue
- 11
- Pages
- 1365-1376
- ISSN
- 0884-0431 (ISSN-L)
- 1523-4681
- OpenAlex
- W2082619937
- Cited by
- 174
- References
- 2
- FWCI
- 3.24
- Type
- journal article
- Language
- en
- Open access
- closed
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- Dr. Lieberherr, M., Grosse, B., Kachkache, M., & Balsan, S. (1993). Cell signaling and estrogens in female rat osteoblasts: A possible involvement of unconventional nonnuclear receptors. Journal of Bone and Mineral Research. https://doi.org/10.1002/jbmr.5650081111
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