Abortifacient properties of aqueous extract of Carica papaya (Linn) seeds on female Sprague-Dawley rats

Experiments were conducted to investigate the abortifacient potential of aqueous extract of Carica papaya (Linn) seeds in female Sprague-Dawley rats. Oral doses of 100 and 800 mg/kg body weight were administered once a day on days 1-10 post-coitum. No significant differences in total body weight were found in foetuses exposed to these regimes. However, in the group treated with 100 mg/kg body weight, there was a significant increase (p < 0.05) in the implantation sites and foetal weight was significantly decreased (p < 0.05) compared to the controls. No dead or malformed foetuses were found. However, in the group treated with 800 mg/kg body weight, there was obvious vaginal bleeding but no treatment related increase in implantation sites compared with control. There was however, complete resorption of about 30% of the foetuses. The surviving foetuses were stunted when compared with the control but were without any external malformations. The results of the present investigations lead to the clear conclusion that low dose aqueous crude extract of Carica papaya (Linn) seeds does not adversely affect prenatal development. The altered toxicological profile indicates that the abortifacient property is a high dose side effect. The results indicate that Carica papaya toxicity can adversely affect the foetus.     

对-壬基酚的幼雌SD大鼠子宫营养试验敏感指标探讨

目的　探究典型的外源性雌激素对 -壬基酚 (p- NP)的幼雌 SD大鼠子宫营养试验敏感指标及其机理。方法　用 2 1d龄 SD雌性大鼠 5 0只 ,随机分为花生油溶剂对照组 ,p- NP6 0 mg/ kg、90 mg/ kg和 12 0 mg/ kg,苯甲酸雌二醇 (E2 B,0 .4 mg/ kg)阳性对照组共 5组 ,每天灌胃一次给药 ,连续 3d。于末次给药后 2 4 h处死动物 ,取子宫称湿质量。用免疫组化技术检测子宫雌激素基因产物孕激素受体 (PR)、雌激素受体 (ER)和增殖细胞核抗原(PCNA)表达情况。结果　 E2 B0 .4 m g/ kg、p- NP90 mg/ kg和 12 0 m g/ kg组的子宫湿质量、子宫 /体质量比与溶剂对照组相比 ,均有显著性差异 (P<0 .0 1) ,且有明显的剂量效应关系。而 p- NP6 0 mg/ kg组的子宫固有层和肌层细胞核有 PR,ER及 PCNA表达 ,且有随剂量递增趋势。结论　子宫营养试验检测雌激素基因产物比其它指标敏感 ,固有层和肌层细胞增生是子宫湿质量增加的原因。     

Prevention and treatment of isoproterenol induced ventricular fibrillation in rats by aqueous extract of Salvia miltiorrhiza]

Acute fatal ventricular fibrillation (VF) in male Sprague-Dawley rats was induced by subcutaneous injection of isoproterenol (1 mg or 5 mg/kg body weight) to two groups of rats of different body weights (525 +/- 21 g or 387 +/- 11 g) respectively. VF occurred in all control rats resulting in 96% death with only 4% spontaneously reverted and survived. Pretreatment of animals, with or without pentobarbital anaesthesia, with an aqueous extract of Salvia miltiorrhiza (SM-H, i.p., 5 g herb/kg body weight) significantly reduced J-point displacement and VF induced by isoproterenol. Survival rate was significantly raised compared with the control (P less than 0.05). Immediate intravenous injection of SM-H (5 g herb/kg body weight) to poisoned rats which developed VF caused 71% of them to recover temporarily their sinus rhythm and significantly prolonged their survival time (P less than 0.05).     

The effect of Bromelia pinguin extract on the pregnant rat uterus

A non proteinaceous extract of Bromelia pinguin fruit was examined for activity on the rat uterus in vivo and in vitro. The in vivo experiments involved pregnant rats given the extract intraperitoneally. These rats did not abort nor were any foetal deformities observed. The extract inhibited spontaneous activity of the pregnant rat uterus in vitro. These results do not support the claimed folklore use of the plant as an abortifacient. The extract of Bromelia pinguin fruit may have some utero-active compound which inhibits uterine motility.     

硼酸对去卵巢大鼠雌激素样作用的观察

目的:评价硼酸的体内雌激素样效应.方法:40只SD大鼠行双侧去卵巢后,随机分为5组,阴性对照组(蒸馏水),低、中、高剂量硼酸组(4 mg/kg、25 mg/kg及75 mg/kg)及阳性对照组(0.10 mg/kg 雌二醇),连续给药3 d后处死大鼠,测定子宫脏器系数及血清总雌二醇水平.结果:阳性对照组子宫脏器系数及血清雌二醇水平均高于阴性对照组(P均＜0.05).高剂量硼酸组大鼠子宫脏器系数高于阴性对照组(P＜0.05);硼酸各剂量组血清雌二醇水平与阴性对照组相比,差异均无统计学意义(P均＞0.05).结论:硼酸能够诱导去卵巢大鼠子宫增重,具有雌激素样效应.     

不同剂量米非司酮治疗子宫肌瘤的临床观察

目的 比较3种不同剂量米非司酮治疗子宫肌瘤的临床效果。方法 将49例子宫肌瘤患者随机分为3组。A组21例，每日口服米非司酮10mg；B组16例，每日口服米非司酮12．5mg；C组12例，每日口服米非司酮25mg。从月经周期第2天开始服药，3个月为1疗程，治疗前及治疗期间每月用B超测量子官及肌瘤体积；检查血红蛋白及肝、肾功能。结果 3组患者在治疗期间均出现闭经，症状消失，血红蛋白恢复正常，肝、肾功能无明显变化。3组子宫及肌瘤体积均明显缩小，A组肌瘤缩小了44．9％，B组肌瘤缩小了46．0％，C组肌瘤缩小了47．4％。3组之间差异无显著性。结论 米非司酮是一种治疗子宫肌瘤的有效药物，每日口服米非司酮10mg可能是较为理想的治疗剂量。     

葛根提取物对去卵巢大鼠阴道子宫及垂体-性轴激素变化的影响

研究葛根提取物对去卵巢大鼠阴道、子宫及垂体-性轴激素变化的影响.选用60只雌性Wistar大鼠,体重250～260 g,除正常组和假手术组外,其余各组动物摘除双侧卵巢.动物随机分为正常组,模型组,雌二醇组,假手术组,葛根提取物低剂量组,葛根提取物高剂量组.各组给药6周后,麻醉后颈动脉取血分离血清,测血清中雌二醇(E2)、促黄体生成素(LH)等激素,剥离阴道与子宫称重.HE染色观察子宫组织形态学变化.结果显示葛根提取物能显著提高去卵巢大鼠阴道和子宫重量;改善子宫萎缩状况;葛根提取物能增加去卵巢大鼠血清E2,含量,降低LH含量.说明葛根提取物增加去卵巢大鼠阴道、子宫重量和改善萎缩状况并改变其血中激素水平,为开发治疗绝经期综合征的新药提供实验依据.     

Estrogen Receptor α and β Expressions in Hypothalamus-pituitary-ovary Axis in Rats Exposed Lactationally to Soy Isoflavones and Bisphenol A

Objectives This paper aims to investigate the uterotrophic activities of lactational exposure to combination of soy isoflavones （SIF） and bisphenol A （BPA） and to examine estrogen receptor α （ERα） and estrogen receptor β （ERβ） expressions in hypothalamus-pituitary-ovary axis and uterus.Methods Maternal rats that were breeding about 8 litters were randomly divided into four groups with seven dams in each group.Dams in different treatment groups received corn oil （control）,150 mg/kg BW of SIF,150 mg/kg BW of BPA or combination of 150 mg/kg BW of SIF and 150 mg/kg BW of BPA,respectively,from postnatal day 5 to 11 （PND5-11） by gavage.On PND12 and PND70,10 female litters were killed and hypothalamus,pituitary,ovary and uterus were collected.ERα and ERβ expressions in these organs were detected with Western blotting assay.And vaginal opening time and estrus cycle were examined in animals fed for PND70.Results On PND12,the relative uterine weight of rats treated with ISF or BPA or their combination was significantly higher than that of untreated rats （P〈0.05）.But the relative uterine weight of rats in the co-exposure group was slightly lower than that in the group only exposed to SIF or BPA.On PND 70,however,the relative uterine weight in each treatment group was not statistically different from that in the control group （P〈0.05）.Vaginal opening time and estrus cycle in groups treated with SIF or BPA or their combination were similar to those in the control group （P〈0.05）.Exposure to SIF or BPA or their combination could up-regulate or down-regulate ERα and ERβ expressions in hypothalamus,pituitary,ovary and uterus on PND12 and PND70.These regulation patterns for ERα and ERβ were different in different organs at different time points.Conclusion Lactational exposure to ISF or BPA or their combination could induce uterotrophic responses in neonate rats,which disappeared in later life.But these data fail to suggest a possibility for synergic actions between SIF and BPA.It was also demonstrated that the uterotrophic effects of SIF and BPA exposure might,at least,involve modification of ERα or ERβ expressions in the hypothalamus-pituitary-ovary axis.     

米非司酮治疗子宫肌瘤的临床研究及对性激素的影响

目的探讨米非司酮治疗子宫肌瘤的临床疗效和治疗前后血清性激素水平的变化.方法让确诊为子宫肌瘤的45例患者睡前口服米非司酮25mg,每日1次,连服3个月.治疗前后B超测量子宫及肌瘤体积、血清性激素水平等指标.结果患者在治疗期间均出现闭经,临床症状明显改善,子宫体积平均缩小32.63%,肌瘤体积平均缩小52.56%.FSH、LH、PRL、E2和P平均浓度较用药前下降,以E2和P下降明显(P＜0.01).结论米非司酮治疗子宫肌瘤疗效好,副作用轻,为保守治疗子宫肌瘤提供了一条新的治疗途径.     

哌嗪雌酚酮对老年大鼠腰椎骨代谢的影响

目的研究新合成化合物哌嗪雌酚酮对雌性老年大鼠腰椎骨代谢及子宫的影响。方法 32只 2 2月龄SD大鼠 ,随机分为 4组 :对照组 (生理盐水 0 .1mL/kg·d-1) ,哌嗪雌酚酮高、中、低剂量组 (2、1和 0 .5mg/kg·d-1) ,皮下注射 30d ,取第 5腰椎行不脱钙骨制片骨形态计量学测量分析 ,同时取子宫称重。结果与对照组比较 ,哌嗪雌酚酮组骨量增加。其中中剂量 (1mg)组骨形成增加 ,骨吸收降低 ,骨量增加差异有显著性 ;子宫重量无明显变化。结论哌嗪雌酚酮可有效预防老年大鼠骨质减少 ,中剂量 (1mg)组效果最明显 ,且无明显刺激子宫的副作用     

印度草药方NR/CAL/06的甲醇提取物对卵巢切除大鼠的抗骨质疏松作用

目的：证实印度草药方NR/CAL/06的甲醇提取物对卵巢切除大鼠的抗骨质疏松作用。方法：雌性Sprague-Drawley大鼠在无菌状态下行双侧卵巢切除术后被分为5组（n=10）。检测NR/CAL/06的甲醇提取物（200和400mg/kg口服）的抗骨质疏松作用并以雷洛昔芬（5.4mg/kg口服）作为标准对照药,治疗时间为90d。实验前后测量各组大鼠的体质量、卵巢质量、骨质量、骨矿物质含量、骨强度,血清及尿液中的钙、磷含量及血清碱性磷酸酶含量。电镜下观察大鼠股骨外径、长度及厚度。结果：双侧卵巢切除术后,大鼠骨质量、骨矿物质含量及骨强度均有下降;电镜观察到卵巢切除大鼠股骨骨质疏松、多孔、破碎,且骨长度及厚度均有所下降。与假手术组相比,卵巢切除大鼠的血清钙、磷及碱性磷酸酶含量均有所升高,体质量及脂肪含量升高,子宫质量降低。NR/CAL/06的甲醇提取物（200和400mg/kg口服）治疗90d能够剂量依赖性地改变大鼠因卵巢切除所引起的上述各项指标变化,并将骨质量、骨矿物质含量、骨强度,血清钙、磷及碱性磷酸酶含量,体质量及脂肪含量恢复至正常水平。此外,经NR/CAL/06的甲醇提取物（200和400mg/kg口服）治疗的大鼠与卵巢切除模型组大鼠相比,电镜下股骨骨质孔形成减少,骨密度增加。结论：本实验的结果证实了NR/CAL/06的甲醇提取物具有很好的抗骨质疏松作用,可用于骨质疏松症的治疗。     

Antihyperglycaemic and antihyperlipidaemic effects of Nymphaea stellata in alloxan-induced diabetic rats

INTRODUCTION: This study aims to investigate Nymphaea stellata (N. stellata) flower extract for antihyperglycaemic and antihyperlipidaemic effects in diabetic rats induced by alloxan. Its effect was compared with that of glibenclamide, a reference antidiabetic drug. METHODS: Diabetic animals were randomly divided into five groups and treated orally with different doses (200, 300 and 400 mg/kg body weight) of flower extract once a day for 30 days. The body weight of each animal was determined, to assess any possible weight gain or loss in experimental animals compared with control groups. On the 31st day, those administered 300 mg/kg of N. stellata flower showed more promising results with regard to fasting blood glucose (FBG), plasma insulin levels, haemoglobin counts, urine sugar levels, food intake, water intake, urea and protein when compared to those treated with other doses. Therefore, 300 mg/kg dose was used for further biochemical studies. Total lipids (TL), total cholesterol (TC), triglycerides (TG), phospholipids, free fatty acids (FFA), low density lipoproteins (LDL), very low density lipoproteins (VLDL), atherogenic index (AI) and high density lipoproteins (HDL) levels, on normal and diabetic rats treated with the dose of 300 mg/kg, were evaluated. RESULTS: The flower extract shows a significant (p-value is less than 0.001) reduction in levels of FBG, water intake, food intake, urine sugar, blood urea, TL, TC, TG, FFA, phospholipids, LDL, VLDL and AI. It also shows a significant increase in body weight, plasma insulin, protein, haemoglobin and HDL levels. CONCLUSION: Our results suggest that N. stellata flower extract exhibit antihyperglycaemic as well as antihyperlipidaemic effects on alloxan-induced diabetic rats.     

温肾养血方对无排卵模型大鼠卵巢质量和形态的影响

目的 探讨温肾养血方对无排卵大鼠子宫指数、卵巢指数及卵巢组织形态的影响.方法 采用丙酸睾酮皮下注射法复制无排卵大鼠模型.将模型大鼠分为模型组,西药组,温肾养血方大、中、小剂量组,分别给予生理盐水,枸橼酸氯米芬,温肾养血方大剂量(52 mg/kg)、中剂量(26 mg/kg)、小剂量(13mg/kg)灌胃.另选22日龄大鼠作为正常组.连续灌胃21 d后,测定各组大鼠体质量、子宫指数和卵巢指数,光镜下观察卵巢组织形态.结果 与正常组比较,模型组大鼠体质量无明显变化(P＞0.05),子宫指数和卵巢指数显著降低(P＜0.05).与模型组比较,各给药组大鼠体质量和子宫指数、卵巢指数无明显变化(P＞0.05).温肾养血方大、中剂量组卵巢形态近似正常组,结构明显改善,多数卵巢可见发育期的各级卵泡,可见卵丘、卵细胞及典型黄体形成.西药组和温肾养血方小剂量组卵巢形态类似模型组,卵巢体积较小,卵巢表面苍白,无斑点,色泽苍白,卵泡数目少,卵泡较小,且形状不规则,多呈囊性扩张,无黄体.结论 温肾养血方能改善卵巢结构和促进卵泡发育.     

扁桃斑鸠菊及非洲印楝叶的提取物对链脲佐菌素致糖尿病大鼠肝脏形态学及肝毒性标志物的影响（英文）

目的：研究扁桃斑鸠菊及非洲印楝叶的提取物对链脲佐菌素致糖尿病大鼠肝脏形态学、肝脏氧化性应激标志物及部分肝脏酶类的影响。方法：大鼠腹腔注射链脲佐菌素致糖尿病。不同治疗组大鼠分别口服扁桃斑鸠菊及非洲印楝叶的提取物（500mg/kg）或二甲双胍（150mg/kg）,疗程8周,每周测量大鼠的血糖水平及体质量变化。8周后麻醉处死大鼠。取肝组织制成切片,希夫染色法染色,并测量肝匀浆中丙二醛和谷胱甘肽过氧化物酶的含量;下腔静脉采血,分离血浆,检测血浆中丙氨酸氨基转移酶和天冬氨酸氨基转移酶的活性。结果：二甲双胍及植物提取物均能显著改善糖尿病大鼠的血糖水平,且与糖尿病模型组相比,治疗组的体质量明显增加（P〈0.05）。光学显微镜下,各组大鼠的肝脏形态学无明显差别。植物提取物治疗组大鼠的血浆丙氨酸氨基转移酶及天冬氨酸氨基转移酶的活性与正常对照组相比无明显变化（P〉0.05）,而丙二醛含量明显下降（P〈0.05）。结论：扁桃斑鸠菊及非洲印楝叶的提取物对糖尿病大鼠有明显的降糖作用,而肝脏形态学及肝毒性标志物没有明显变化。     

新型骨靶向雌激素大黄酸—雌酮抗骨质疏松活性研究

【目的】研究新型雌激素衍生物大黄酸-雌酮{新型骨靶向雌激素3-羟基-雌甾-1,3,5（10）-三烯-17酮-3-[N4-（1,8-二羟基-9,10-蒽醌-3-甲酰基）哌嗪基-N^1-乙基]醚,代号LC}对去卵巢大鼠骨密度及子宫内膜增殖的影响,探讨其抗骨质疏松活性及其对子宫的副作用。【方法】采用去卵巢大鼠模型,每天给予大黄酸-雌酮4μmol/kg（H-LC组）或0.8μmol/kg（L-LC组）,6个月后测定大鼠骨密度（BMD）、骨矿含量（BMC）及子宫重量、子宫直径、子宫内膜厚度变化,并与模型组（OVX组）,雌酚酮组（E组）比较。【结果】与OVX组相比,E组BMD及BMC增加,子宫相对重量及子宫直径均显著增加。L-LC组BMD、BMC及H-LC组BMC显著增加,达到E组水平,子宫相对重量及子宫直径虽高于OVX组,但显著低于E组。【结论】大黄酸-雌酮具有雌激素样的抗骨质疏松活性,但大大降低了对子宫的刺激性。     

桃红四物汤促进产后血瘀大鼠子宫修复的作用

目的 观察桃红四物汤对产后血瘀大鼠子宫修复的促进作用,探讨其与内皮素-1（endothelin-1,ET-1）、诱导型一氧化氮合酶（inducible nitric oxide synthase,iNOS）及血管内皮生长因子（vascular endothelial growth factor,VEGF）和血管内皮生长因子受体2（vascular endothelial growth factor receptor 2,VEGFR-2）的关联性。方法 选取产后血瘀模型复制成功的大鼠40只,将其随机分为桃红四物汤高剂量（18.0 g/kg）、中剂量（9.0 g/kg）、低剂量（4.5 g/kg）组,阳性对照组（益母草颗粒4.3 g/kg）和模型组（蒸馏水）,另取正常雌性大鼠作为正常对照组。连续给药7 d后,腹主动脉取血,分离子宫,苏木精-伊红染色法观察子宫血瘀状态,免疫组织化学法检测子宫VEGFR-2表达情况;酶联免疫吸附法检测血清中ET-1、iNOS及VEGF水平。结果 桃红四物汤可明显改善子宫血瘀程度,促进子宫组织中VEGFR-2的表达;桃红四物汤高、中剂量组大鼠血清VEGF及iNOS水平明显升高（P＜0.05）,ET-1水平明显降低（P＜0.05）。结论 桃红四物汤可促进产后血瘀大鼠子宫修复,其修复作用可能与调节子宫血管舒缩功能及促进子宫血管新生有关。     

塑化剂邻苯二甲酸二(2-乙基己)酯对雌性大鼠子宫 组织的毒性作用

目的：探讨塑化剂邻苯二甲酸二（2-乙基己）酯（DEHP）对雌性大鼠子宫组织的影响,阐明DEHP对雌性大鼠子宫毒性作用的机制。方法：将48只成年雌性Wistar大鼠随机分为对照组（给予玉米油）、低剂量DEHP组（300 mg·kg^-1·d^-1DEHP,1/100 LD₅₀）、中剂量DEHP组（1 000 mg·kg^-1·d^-1DEHP,1/30 LD₅₀）和高剂量DEHP组（3 000 mg·kg^-1·d^-1DEHP,1/10 LD₅₀）,每组12只。于动情间期处死大鼠,称体质量,计算子宫脏器系数;HE染色法观察各组大鼠子宫组织病理形态表现;免疫组织化学染色法测定各组大鼠子宫组织中卵泡刺激素受体（FSHR）和黄体生成素受体（LHR）表达水平。结果：染毒第2、3、4周,各剂量DEHP组大鼠体质量低于对照组（P<0.05）,且呈现明显的剂量-效应关系;各组大鼠子宫脏器系数比较差异无统计学意义（P>0.05）。肉眼可见对照组大鼠子宫形态正常,中和高剂量DEHP组大鼠子宫扭曲、管壁变薄,管腔内有大量黄色或清亮液体,并呈重度扩张;子宫浆膜面可见不同程度的积水、充血和肿胀现象。镜下各剂量DEHP组大鼠子宫内膜出现胞核假复层现象,上皮增生和内皮纤维化,固有层腺体数减少,部分腺体萎缩。与对照组比较,各剂量DEHP组大鼠子宫组织免疫组织化学染色程度逐渐减弱,面积减小。各剂量DEHP组大鼠子宫组织中FSHR表达水平比较差异无统计学意义（P>0.05）。与对照组比较,各剂量DEHP组大鼠子宫组织中LHR表达水平明显降低（P<0.05）;且中和高剂量DEHP组大鼠明显低于低剂量DEHP组（P<0.05）。结论：DEHP可导致雌性大鼠体质量降低,子宫组织发生病理学改变,对雌性大鼠产生子宫毒性作用。     

米非司酮配伍甲基睾丸素治疗子宫肌瘤的临床观察

目的 探讨米非司酮配伍或不配伍甲基睾丸素治疗子宫肌瘤的临床效果及副作用。方法将绝经前有症状的子宫肌瘤患者173例随机分两组，A组：米非司酮组88例，米非司酮5mg口服，日一次；B组：米非司酮、甲基睾丸素组85例，米非司酮5mg、甲基睾丸素5mg，口服，日一次。两组服药方法：从月经周期第一天开始，连服3个月。在治疗前后B超测量子宫体积，行子宫内膜病检，观察子宫内膜变化；检测雌孕激素水平，血红蛋白，肝、肾功能，观察服药后的副反应，并按期随访。结果两组患者治疗期间均闭经，子宫内膜及雌孕激素水平维持于增殖早期，血红蛋白上升。两组治疗后子宫体积，最大肌瘤的平均体积缩小。治疗后两组之间有显著性（P〈0．01），B组子宫和最大肌瘤体积缩小较大。两组副反应类似且无需特殊处理，停药后多数患者月经逐渐恢复，肌瘤复发。结论米非司酮配伍甲基睾丸素是更合理的方法，但停药后易复发，适于术前或围绝经期用药，无法替代手术治疗。     

Antidiabetic and haematological effect of aqueous extract of stem bark of Afzelia africana (Smith) on streptozotocin-induced diabetic Wistar rats

Objective

To investigate the antidiabetic properties of aqueous extract of stem bark of Afzelia africana (A. africana) and its beneficial effect on haematological parameters in streptozotocin induced diabetic rats.

Methods

A total of 30 rats including 24 diabetic and 6 normal rats were used for this study. Diabetes was induced in male Wistar rats by intraperitoneal injection of streptozotocin. After being confirmed diabetic, animals were orally treated with distilled water or extracts at 100 or 200 mg/kg body weight daily for 10 days. The haematological parameters including red blood and white blood cells and their functional indices were evaluated in diabetic treated groups compared with the controls.

Results

The extract significantly reduced the blood glucose levels while the best result was obtained at 200 mg/kg body weight. The feed and water intake in diabetic rats were significantly reduced while weight loss was minimized at both dosages. Similarly, the levels of red blood, white blood cells and their functional indices were significantly improved after extract administration at both doses.

Conclusions

It can be concluded that the aqueous extract of bark of A. africana possesses antihyperglycemic properties. In addition, the extract can prevent various complications of diabetes and improve some haematological parameters. Further experimental investigation is needed to exploit its relevant therapeutic effect to substantiate its ethnomedicinal usage.     

黄豆提取物的雌激素依赖作用对戊四唑诱发的大鼠癫痫的影响

目的：研究黄豆提取物对经戊四唑（pentylenetrazole,PTZ）诱发癫病发作的女性荷尔蒙缺失雌性大鼠与正常雌性大鼠的不同作用,以及因性别差异引起的植物雌性激素对行为的影响。方法：雄性Wistar大鼠被随机分为雄性生理盐水组,雄性低、中、高剂量黄豆提取物治疗组,每组8只;雌性Wistar大鼠随机分为假手术生理盐水组,假手术低、中、高剂量黄豆提取物治疗组,去卵巢生理盐水组,去卵巢低、中、高剂量黄豆提取物治疗组,每组8只。去卵巢大鼠在氯胺酮麻醉下行卵巢切除术。分别给予各组大鼠生理盐水及不同剂量黄豆提取物治疗2周后腹腔内注射戊四唑。将大鼠放置在树脂玻璃笼内,记录最小阵挛性癫痫发作（minialclonicseizure,MCS）潜伏期和强直性阵挛性癫痫发作（generalizedtonic-clonicseizure,GTCS）潜伏期。结果：与雄性生理盐水组大鼠比较,雄性低、中剂量黄豆提取物治疗组的MSC和GTCS潜伏期显著缩短（P〈10．05或P〈0．01）。雌性假手术大鼠在给予黄豆提取物治疗后,其MSC和GTCS潜伏期没有显著改变。与去卵巢生理盐水组比较,去卵巢低、高剂量黄豆提取物治疗组的MSC和GTCS潜伏期明显缩短（P〈0．05或P〈0．01）。结论：黄豆的植物雌激素能影响由PTZ诱发的癫痫发作的轻重程度,但其影响程度与卵巢激素水平有关。机制还有待进一步研究。