{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T21:04:37Z","timestamp":1774645477261,"version":"3.50.1"},"reference-count":55,"publisher":"Oxford University Press (OUP)","issue":"11","license":[{"start":{"date-parts":[[2000,11,1]],"date-time":"2000-11-01T00:00:00Z","timestamp":973036800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2000,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Estrogen and the estrogen receptor (ER) play a central role in bone metabolism as illustrated by the loss of bone mass after menopause and the osteopenia in individuals with defect aromatase or ER. We therefore wanted to investigate the effect of polymorphisms in the ER-\u03b1 gene on bone mass, bone turnover, and the prevalence of osteoporotic fractures in a study of 160 women and 30 men with vertebral fractures and 124 women and 64 men who are normal. Three previously described polymorphisms, G261-C in exon 1 and T-C and A-G in intron 1, in the ER gene were determined by restriction fragment length polymorphism (RFLP) using BstUI, Pvu II, and Xba I after polymerase chain reaction (PCR). A TA repeat polymorphism in the promoter region was examined by PCR and electrophoresis. The distribution of BstUI, Pvu II, and Xba I RFLPs was similar in the osteoporotic patients and the normal controls. No significant differences could be shown in bone mass or bone turnover between the genotypes. The mean number of TA repeats was lower in patients with osteoporotic fractures, 17.3 \u00b1 2.8 versus 18.6 \u00b1 2.8 in the normal controls (p &amp;lt; 0.01). This also was reflected in a significantly increased odds ratio of osteoporotic fractures in individuals with 11\u201318 repeats of 2.64 (95% CIs, 1.61-4.34). Furthermore, bone mineral density (BMD) of the lumbar spine was lower in individuals with low mean number of repeats than in individuals with high mean number of repeats (0.790 \u00b1 0.184 g\/cm2 vs. 0.843 \u00b1 0.191 g\/cm2; p &amp;lt; 0.05). This difference also was found in BMD of the total hip. Using multiple linear regression, mean number of TA repeats was a predictor of lumbar spine BMD (p &amp;lt; 0.05) and a BMD-independent predictor of fractures (p &amp;lt; 0.05). Mean number of TA repeats was not associated with levels of biochemical markers of bone turnover. All four polymorphisms were in linkage disequilibrium. A TA repeat polymorphism in the ER gene is associated with increased risk of osteoporotic fractures and a modest reduction in bone mass. Polymorphisms in the first exon and first intron of the ER gene are not associated with osteoporotic fractures, bone mass, or bone turnover.<\/jats:p>","DOI":"10.1359\/jbmr.2000.15.11.2222","type":"journal-article","created":{"date-parts":[[2006,4,27]],"date-time":"2006-04-27T02:09:39Z","timestamp":1146103779000},"page":"2222-2230","source":"Crossref","is-referenced-by-count":81,"title":["A TA Repeat Polymorphism in the Estrogen Receptor Gene Is Associated with Osteoporotic Fractures but Polymorphisms in the First Exon and Intron Are Not"],"prefix":"10.1093","volume":"15","author":[{"given":"Bente L.","family":"Langdahl","sequence":"first","affiliation":[{"name":"Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus Amtssygehus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elsebet","family":"L\u00f8kke","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus Amtssygehus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mette","family":"Carstens","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus Amtssygehus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lise Lotte","family":"Stenkj\u00e6r","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus Amtssygehus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Erik Fink","family":"Eriksen","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus Amtssygehus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2009,12,2]]},"reference":[{"key":"2024020714083765200_bib1","doi-asserted-by":"crossref","first-page":"706","DOI":"10.1172\/JCI113125","article-title":"Genetic deteminants of bone mass in adults. 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