分子识别理论在促甲状腺激素受体系统的应用  

Application of molecular recognition theory in thyrotropin and its receptor system

作　　者：陆凤先[1] 戴承恺[1] 汤特[1] 叶静[1] 王伟[1] 

机构地区：[1]天津医科大学病理生理学教研室,天津300070

出　　处：《中国病理生理杂志》2004年第9期1587-1592,共6页Chinese Journal of Pathophysiology

基　　金：天津市自然科学基金资助项目(No.96360751)

摘　　要：目的观察促甲状腺激素受体(TSHR)分子上的特定片段-TR1(aa37-45)、TR2(aa353-366)和TR3(aa648-655)与其相应的反义肽-RT1(aa45-37)、RT2(aa366-353)和RT3(aa655-648)之间的选择性识别。方法制备固相反义肽亲和层析柱-RT1-sepharose4B,RT2-sepharose4B和RT3-sepharose4B,采用阶段洗脱法,观察相应天然肽-TR1、TR2和TR3在柱上的滞留行为。结果TR1、TR2和TR3与其相应的反义肽之间存在选择性识别,而反义肽RT1且能识别TSHR大分子;此外,牛促甲状腺激素(bTSH)蛋白还能被TR1识别。结论本实验证实了分子识别理论在促甲状腺激素受体系统的存在,它可能用于生物大分子蛋白质的分离、促甲状腺激素(TSH)与受体(TSHR)结合位点的测定,并用于实验性自身免疫性甲状腺炎大鼠的实验性治疗。AIM: The selective recognition of the sense peptides which are located in special regions of thyrotropin receptor (TSHR) by their corresponding antisense peptides has been investigated. Three pairs of sense and antisense peptides were named TR1 (aa37-45) and RT1 (aa45-37), TR2 (aa353-366) and RT2 (aa366-353), TR3 (aa648-655) and RT3 (aa655-648). METHODS: To prepare three affinity chromatography columns, antisense peptides were immobilized, called RT1-sepharose 4B, RT2-sepharose 4B and RT3-sepharose 4B, respectively and investigate the retardative behavior for each of native peptide TR1, TR2 or TR3 on above columns with stepwise elution. RESULTS: Each of the three immobilized antisense peptides recognized and retarded its corresponding sense peptide-TR1, TR2 or TR3 instead of those non-complementary peptides. Immobilized RT1 recognized free TSHR protein molecule as well. In additional, bovine thyrotropin was recognized by immobilized TR1. CONCLUSION: The results indicate that molecular recognition theory exsits in thyrotropin receptor system. It may be useful to isolate biological molecules and to locate epitopes of TSH on TSHR molecule. Otherwise, antisense peptide may be used for treatment of experimental autoimmunolized thyroid disease (AITD) in the rat. [

关 键 词：受体 促甲状腺激素 分子识别理论 肽类 色谱法 亲和 

分 类 号：R363[医药卫生—病理学]