Influence of hyperthyroid conditions on gene expression in rat extraocular muscles

Extraocular muscles (EOMs) are a highly specialized type of tissue with a wide range of unique properties, including characteristic innervation, development, and structural proteins. Even though EOMs are frequently and prominently involved in thyroid-associated diseases, little is known about the immediate effects of thyroid hormone on these muscles. In order to create a comprehensive profile of changes in gene expression levels in EOMs induced by thyroid hormone, hyperthyroid conditions were simulated by treating adult Sprague-Dawley rats with intraperitoneal injections of 25 µg T3 per 100 g body weight over the course of six weeks; subsequently, microarray analysis was used to determine changes in mRNA levels in EOMs from T3-treated animals relative to untreated controls.眼外肌（Extraocular muscles, EOMs）是一类高度特化的组织，具备诸多独特属性，包括特征性的神经支配、发育特性与结构蛋白组成。尽管眼外肌常显著受累于甲状腺相关疾病，但目前对甲状腺激素作用于这类肌肉的直接效应仍知之甚少。为全面解析甲状腺激素诱导的眼外肌基因表达水平变化特征，研究人员通过连续6周向成年斯普拉-道来（Sprague-Dawley）大鼠腹腔注射每100g体重25μg的T3，以模拟甲状腺功能亢进状态；随后采用微阵列（microarray）分析，对比经T3处理与未处理对照组大鼠的眼外肌组织，测定其mRNA水平的变化差异。