The Effect of Tripterygium Wilfordii Monomer T4 on Rat Spermatid Nuclear Protein Transition

Rat testis elongating spermatids and epididymal sperms were collected after 7 weeks of treatment with Tripterygium wilfordii monomer T4.Total nuclear basic protein(TNBP)was extracted from the elongating spermatid nuclei and the sperm nuclei isolated by sonication.Polyacrylamide gel electrophoresis has been used to separate the TNBP and individual proteins were quantified by scanning microdensitometry.It was found that the content of protamine was reduced and the TH(Total Histones)/RP(Rat Protamine)ratios were increased following treatment in the testis elongating spermatids, and same result was found in the epididymal sperms.These results suggest that the interruption of nuclear protein transition of testis spermatids induced by T4 might cause aberrant epididymal sperm nuclear protein and lead to infertility.The relationship between protamine and fertility was discussed.

雷公藤单体T_4、T_7、T_（15）及雷公藤内酯醇对大鼠精子核蛋白组型的影响

大鼠喂服雷公藤单体Ｔ_４、Ｔ_７、Ｔ_（１５）及雷公藤内酯醇（甲素）７周后，取附睾精子，用超声法分离精子核，从核提取总碱性蛋白（ＴＮＢＰ）。经电泳扫描分析，发现精子ＴＮＢＰ含量下降，总组蛋白（ＴＨ）／精核蛋白（ｐｒｏｔａｒｍｉｎｅ）比值升高，精核蛋白含量下降，提示以上雷公藤单体和甲素使精子细胞核蛋白组型转换受阻是导致大鼠不育的重要原因之一。

雷公藤单体T4对大鼠变态期精子细胞核蛋白转换的影响

大鼠喂服雷公藤单体Ｔ４７周后，取睾丸分离长形精子细胞核，取附睾分离精子核，提取总碱性核蛋白（ＴＮＢＰ），经电泳扫描后分析，发现长形精子细胞核ＴＨ／ＲＰ（总组蛋白／大鼠精核蛋白）比值升高，糖核蛋白含量下降，附睾精子核碱性蛋白也发生类似的改变，表明睾丸变态期精子细胞组蛋白一精核蛋白取代反应受阻，进而导致附睾精子核蛋白异常，这可能是Ｔ４导致大鼠不育的重要原因。文中还对精核蛋白与生育力的关系予以讨论。

HMGB1介导的炎症通路在雷公藤致大鼠肝损伤中的作用研究

目的:研究高迁移率族蛋白B1(HMGB1)介导的炎症通路HMGB1-Toll样受体4(TLR4)/核转录因子κB(NF-κB)在雷公藤致大鼠肝损伤中的作用,为阐明雷公藤致肝损伤的作用机制提供参考。方法:将24只SD大鼠随机分为空白组(生理盐水,灌胃)、雷公藤组(以生药计16 g/kg,灌胃)和中和剂组(腹腔注射100 mg/kg甘草酸铵溶液3 h后再灌胃以生药计16 g/kg的雷公藤),每组8只,各组大鼠均连续给药3周。每周给药后均检测大鼠血清中天冬氨酸转氨酶(AST)和丙氨酸转氨酶(ALT)水平;给药结束后,采用酶联免疫吸附法检测大鼠血清中HMGB1、白细胞介素1β(IL-1β)、IL-2、肿瘤坏死因子α(TNF-α)水平,Western blot法检测大鼠肝组织中HMGB1、NF-κB p65、TLR4蛋白表达,苏木精-伊红染色后观察大鼠肝组织病理学改变。结果:给药3周后,雷公藤组大鼠血清中AST、ALT、HMGB1、IL-1β、IL-2、TNF-α水平以及肝组织中HMGB1、NF-κB p65、TLR4蛋白表达水平均显著高于空白组和中和剂组(P<0.05或P<0.01)。雷公藤组大鼠肝组织中央静脉周围肝细胞水肿,部分肝细胞浆内可见圆形空泡;中和剂组大鼠仅少量细胞内可见大小不一的空泡。结论:雷公藤致大鼠肝损伤的机制可能与其激活了HMGB1-TLR4/NF-κB炎症通路有关。