Lower Estrogen Levels Are A Risk Factor For Knee Osteoarthritis

Led via MaryFran R. Sowers of the University of Michigan inside Ann Arbor, MI, the search built-in 842 premenopausal or perimenopausal women from the Southeast Michigan Arthritis Cohort. The women have annual X-rays of both knees along beside analysis of blood repute of estradiol and urine levels of 2-hydroxyestrone and 16á-hydroxyestrone, two estrogen metabolites. Patients be also interview about despondency, prerequisite, and lifestyle and were follow in investment of three years. The grades show that the women who residential knees OA during the study spell had greater chance of enjoy estradiol concentration and urinary 2-hydroxyestrone levels in the lowest third of the study population, and a importantly developed ratio of 2-hydroxyestrone to 16á-hydroxyestrone, even after adjust for other speculate factor.

"Selected employment with animal model present support for the increased odds of burgeoning OA with demean estradiol concentrations," the novelist minute. This be one of the few study that have certainly examine hormone concentrations, in particular in percentage to latest cases of OA, and the former to dissect levels of estrogen metabolites. The authors posit that the role of higher 2-hydroxyestrone concentrations in delay the encouragement of knee OA may be to a long-term level through the metabolism of arachidonic knife-like, a tangled from which cell mixed up in inflammation (such by means of leukotrienes) be produced, since estrogen metabolites have be shown to pirouette an impressive role here pathway.

Jamadar, Arthritis & Rheumatism, August 2006; (DOI: 10.1002/art.22005).

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