Abstract
The purpose of this study was to examine whether mechanical tensile forces affect estrogen regulation of collagen synthesis of anterior cruciate ligament fibroblasts at the mRNA level. Estrogen was studied at three physiologic levels, 10 −11, 10 −10, and 10 −9 M. The results revealed that estrogen alone stimulated Type I and III collagen synthesis at the mRNA level, and application of mechanical force decreased the expression of collagen Type I and III genes at all tested estrogen levels. These findings suggest that estrogen may directly regulate ligament structure and function by alteration of Type I and III collagen synthesis. This regulation is dependent on mechanical loading.
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