Gender and Neurogenic Variables in Tendon Biology and Repetitive Motion Disorders

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Abstract
The incidence of repetitive motion disorders is increasing. Numerous studies have indicated that the incidence in females exceeds that in males. Some of the evidence regarding gender related factors in tendon biology is discussed and new data related to the regulation of gene expression in an animal model of tendon overuse, the determination of sex hormone receptors in tendons, and the influence of pregnancy associated factors on gene expression in four different tendons is provided. Furthermore, because neurogenic mechanisms may contribute to inflammatory conditions, new evidence is provided that supports the concept that neurotransmitters can influence expression of genes that could participate in such inflammation. By increasing our understanding of the regulation of tendon cellular and molecular biology, new approaches to preventing disease development and treatment of existing disease may evolve.