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2003 OCT 2 - (NewsRx.com & NewsRx.net) -- Matrix metalloproteinases may play a role in endometriosis; sometimes this may be in response to steroids.
"Retrograde menstruation represents a plausible explanation for the development of most cases of endometriosis; nevertheless, additional factors must contribute to the development of disease in only 10-20% of women. The discriminating factor(s) in determining the development of active endometriosis probably involves a complex array of potentially interactive influences including steroid exposure, immunological disturbances, genetic predisposition, and, perhaps, environmental toxin exposure," scientists in the United States report.
"Matrix metalloproteinases (MMPs), enzymes that mediate normal tissue turnover, including endometrial breakdown at menstruation, appear to be involved in the invasive establishment of the disease. In addition, several MMPs appear to be inappropriately expressed in the endometrium of women with this disease in association with a reduced sensitivity to progesterone," wrote K.G. Osteen and ...