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                                                                                          Dott. Carlo Sebastiano Tadeo
                                                                                                Specialista Neurologia

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Hormone Replacement Therapy May Prevent Cognitive Decline in Older Women


SAN FRANCISCO, CA -- May 23, 2000 -- Hormone replacement therapy (HRT) may protect against cognitive decline in women 65 and older who have a certain genetic make-up

Researchers led by a UC San Francisco scientist are reporting that hormone replacement therapy (HRT) using estrogen may protect against cognitive decline in women 65 and older. The study of 3,393 women, to be published in the May 23 issue of Neurology, is the first to show that the genes a woman inherits can affect her response to estrogen.

Women who carry a certain variety of a gene called ApoE were half as likely to suffer cognitive deterioration after age 65 if they were using estrogen, said principal investigator Kristine Yaffe, MD, assistant professor of psychiatry, neurology and epidemiology at UCSF and chief of geriatric psychiatry at San Francisco Veterans Affairs Medical Center.

The ApoE (Apolipoprotein E) gene, which has three possible variants or alleles (e2, e3 and e4) is a blueprint for a protein that carries cholesterol and fats between the liver, brain and other tissues.

Estrogen-using women who carry the e2 and e3 variants (inherited as a pair from their parents) experience
d less cognitive loss during the seven year study, said Dr.Yaffe. The results indicate that estrogen may help prevent cognitive decline in women who carry e2 and e3 alleles, she explained. The researchers also studied women who carry at least one e4 allele and have a higher risk of developing Alzheimer's Disease (AD), according to previous studies. In these women, estrogen use did not protect against cognitive decline.



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Aggiornato il: 27 February 2001