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Research from University of Michigan, Medical Department has provided new information about biopsy.
In this recently published study, investigators in the United States conducted a study "To evaluate the effectiveness of topical estradiol in stimulating collagen I and III production in naturally aged and photoaged human skin of postmenopausal women and age-matched men. Vehicle-controlled treatment followed by biochemical and immunohistochemical analyses of skin biopsy specimens."
"Academic referral center. Seventy healthy volunteers (40 postmenopausal women with a mean age of 75 years, and 30 men with a mean age of 75 years) with photodamaged skin. Topical application of estradiol, 0.01%, 0.1%, 1%, or 2.5% or vehicle on aged or photoaged skin, with biopsy specimens taken after last treatment. De novo synthesis of collagen by quantitative polymerase chain reaction, immunohistochemistry, and enzyme-linked immunosorbent assay. Topical estradiol increased procollagen I and III messenger RNA and collagen I protein levels in sun-protected aged hip skin in postmenopausal women and, to a lesser extent, in age-matched men. Surprisingly, no significant changes in production were observed in women or men after 2-week estradiol treatment of photoaged forearm or face skin, despite similar expression of estrogen receptors (ER-alpha, ER-beta, and GPR30) in aged and photoaged skin. Estradiol treatment induced the estrogen-responsive gene GREB1, indicating that penetration of topical estradiol and genomic response to estrogen were similar in the 3 anatomic sites. Two-week topical estradiol treatment stimulates collagen production in sun-protected hip skin, but not ...
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Source: HighBeam Research, Research from University of Michigan, Medical Department has provided...