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Evidence for estrogen receptor expression during medullary bone formation and resorption in estrogen-treated male Japanese quails (Coturnix coturnix japonica).

ABSTRACT: The temporal expression of estrogen receptor (ER)-? and ER-? mRNA was examined in male Japanese quails. Femurs of quails receiving 17?-estradiol underwent RT-PCR and histochemical analysis 1 to 15 days after treatment. Untreated quails were used as controls (day 0). Between days 0 and 5, cells lining the bone endosteal surface differentiated into osteoblasts, which in turn formed medullary bone. Expression of ER-? was already observed on day 0 and increased slightly during bone formation whereas ER-? was hardly detected throughout this process. After osteoclasts appeared on the medullary bone surface, this type of bone disappeared from the bone marrow cavity (days 7˜15). ER-? expression simultaneously decreased slightly and ER-? levels remained very low. These results suggest that estrogen activity mediated by ER-? not only affects medullary bone formation but also bone resorption.

SUBMITTER: Hiyama S 

PROVIDER: S-EPMC3467396 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature

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Evidence for estrogen receptor expression during medullary bone formation and resorption in estrogen-treated male Japanese quails (Coturnix coturnix japonica).

Hiyama Shinji S   Sugiyama Toshie T   Kusuhara Seiji S   Uchida Takashi T  

Journal of veterinary science 20120901 3

The temporal expression of estrogen receptor (ER)-α and ER-β mRNA was examined in male Japanese quails. Femurs of quails receiving 17β-estradiol underwent RT-PCR and histochemical analysis 1 to 15 days after treatment. Untreated quails were used as controls (day 0). Between days 0 and 5, cells lining the bone endosteal surface differentiated into osteoblasts, which in turn formed medullary bone. Expression of ER-α was already observed on day 0 and increased slightly during bone formation whereas  ...[more]

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