大鼠下颌下腺卵泡刺激素、黄体生成素的分布及与促性腺激素释放激素受体的共定位研究

目的研究卵泡刺激素(FSH)和黄体生成素(LH)在大鼠下颌下腺中的定位、分布及与促性腺激素释放激素受体(GnRHR)共定位的关系。方法采用邻片免疫组织化学共定位方法。结果大鼠颌下腺浆液性腺泡上皮细胞、分泌管、排泄管及颗粒曲管上皮细胞均呈FSH和LH免疫反应阳性，阳性颗粒分布在细胞质内，细胞核阴性。邻片共定位结果显示颌下腺GnRHR免疫反应阳性细胞同样呈FSH免疫反应阳性，大部分的GnRHR免疫反应阳性细胞呈LH免疫反应阳性，小部分呈免疫反应阴性。两种免疫反应阳性物质均分布在细胞质内，细胞核阴性。结论大鼠下颌下腺浆液性腺泡上皮细胞、分泌管、排泄管和颗粒曲管上皮细胞可能以自分泌或旁分泌的GnRH调节自身合成与分泌FSH和LH。

STUDIES ON DISTRIBUTION OF FSH, LH AND COLOCALIZATION WITH GnRHR IN RAT SUBMAXILARY GRANDS

Objective To investigate the distribution of folliclestimulating hormone (FSH),luteinizing hormone (LH) and colocalization with gonadotropin releasing hormone receptor (GnRHR) in rat submaxilary glands. Methods Distribution of FSH, LH and colocalization with GnRHR consecutive sections of rat submaxilary glands were investigated by immunohistochemical colocalization methods. Results FSH and LH immunoreactivity were observed in the epithelial cells of serous acinus, secretory tubes, excretory ducts and granular convoluted tubule. The immunoreactive materials were brown and distributed in the cytoplasma with negative nucleolus. The results of immunohistochemical colocalization showed not only FSH but also GnRHR immunoreactivity in the same structure of two adjacent section. The distribution of the positive substance of FSH and GnRHR were similar to each other. The most of showing GnRHR immunoreactivity cells were detected LH immunoreactivity in the same structure of two adjacene section and the others were immunonegative. The GnRNR immunoreactive materials were distributed in the cytoplasma with negative nucleolus.Conclusion The epithelial cell of serous acinus, secretory tubes, excretory ducts and granular convoluted tubule of rat submaxilary glands may be synthesized and secreted FSH and LH. These cells with FSH and LH positive immunoreaction of rat submaxilary glands may be regulated by Gonadotropin releasing hormone (GnRH) through autocrine or paracrine.;