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Research reports on autoimmune disease from University of Florida provide new insights.(Report)

Women's Health Weekly

| March 05, 2009 | COPYRIGHT 2009 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

"Previous studies have shown that treatment of ovariectomized females with 17-beta estradiol (E2) accelerates the development of autoimmunity in the (NZB x NZW)F-1 murine lupus model. Treatment with estrogenic organochlorine pesticides (OCPs) such as chlordecone produces a similar effect," scientists in the United States report (see also Autoimmune Disease).

"Although it is reasonable to postulate that the effects of chlordecone and related OCPs on autoimmunity are due to their estrogenic effects, this has not been clearly demonstrated. The objective of this study was to compare effects of chlordecone and E2 on splenic T lymphocyte parameters plausibly related to autoimmunity; specifically, on T-cell phenotype and functions. Ovariectomized (NZB x NZW)F-1 mice were treated for 6 weeks with implanted sustained-release pellets containing chlordecone or E2 at dosing rates shown previously to significantly shorten time to onset of disease. E2, but not chlordecone, increased the percentage of activated and memory CD4 T-cells, and reduced naive CD4 T-cells. E2 also elevated CD25 and glucocorticoid-induced TNF receptor (GITR) levels in CD4 T-cells, an effect not shared by chlordecone, On the other hand, both chlordecone and E2 increased Bcl-2 expression in CD4 T-cells and reduced CD4 T-cell apoptosis without affecting their proliferation. Although both treatments increased TNF-alpha and IL-2 secretion by CD4 T-cells, only chlordecone increased secretion of ...

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Source: HighBeam Research, Research reports on autoimmune disease from University of Florida...

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