期刊
TRENDS IN ENDOCRINOLOGY AND METABOLISM
卷 21, 期 4, 页码 237-244出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tem.2009.12.002
关键词
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Parathyroid hormone (PIN) has bone anabolic activity when administered intermittently, affecting cells of the osteoblastic lineage at various stages, yet much remains to be learned about precisely how PTH promotes osteoblastic bone formation. Recent discoveries revealed that PTH causes transcriptional suppression of the osteocyte marker gene SOST, which encodes the potent secreted bone formation inhibitor, sclerostin. This review addresses whether osteocytes, terminally differentiated cells of the osteoblastic lineage, which are entrapped within the mineralized bone matrix, contribute to PTH-induced bone formation responses via regulation of sclerostin levels, and discusses recent evidence on how the bone anabolic responses elicited by intermittent PTH treatment or by sclerostin inhibition overlap and diverge.
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