12种中草药的乙醇提取液对印鼠客蚤的毒效研究

目的:探讨中草药灭蚤的可行性。方法:用乙醇提出12种中草药的可溶成分,以瓶膜法测定其对印鼠客蚤的毒力。结果:在0.5g/ml(生药)的浓度下,10种中草药对印鼠客蚤有速效击倒作用,其中鸡血藤、巴豆仁、除虫菊花的10min击倒率大于50％;5种中草药的KD_(50)小于15min,比2％DDVP为优;巴豆仁接触30min恢复24h死亡率为70％。结论:除虫菊花、黎芦、鸡血藤、巴豆仁、贯众用于杀蚤有一定价值。     

多囊卵巢综合征患者卵巢间质胰岛素样生长因子受体的表达

目的：探讨肥胖及非肥胖多囊卵巢综合征（ＰＣＯＳ）患者卵巢间质胰岛素样生长因子（ＩＧＦ－Ⅰ）受体基因的定量表达。方法：用逆转录基因扩增技术（ＲＴ－ＰＣＲ），检测３５例ＰＣＯＳ患者（肥胖组１５例，非肥胖组２０例）及２０例正常妇女（对照组）卵巢间质细胞ＩＧＦ－Ⅰ受体ｍＲＮＡ的表达量（灰度比值）。并对ＩＧＦ－Ⅰ受体基因ｍＲＮＡ逆转录的ｃＤＮＡ产物进行限制性内切酶酶切分析。结果：ＰＣＯＳ两组ＩＧＦ－Ⅰ受体基因的表达量显著高于对照组，ＰＣＯＳ两组灰度比值为１．１８４±０．２４０，对照组灰度比值为０．９９９±０．０８６（Ｐ＜０．００１）。非肥胖组（１．２３８±０．３８７）明显大于肥胖组（１．０５８±０．１０９，Ｐ＜０．１）。酶切分析证实，３组ＩＧＦ－Ⅰ受体基因扩增片段相同，ＰＣＯＳ两组未发现明显的碱基突变存在。结论：ＰＣＯＳ患者卵巢间质ＩＧＦ－Ⅰ受体基因呈过度表达。且ＰＣＯＳ非肥胖患者局部ＩＧＦ－Ｉ受体表达高于ＰＣＯＳ肥胖患者。     

贫血患者血清红细胞生成素浓度的测定及临床意义

用小鼠胎肝细胞体外血浆凝块培养红系集落(Erythroid colong formig unit inculturc,E-CFUc)方法,以红细胞生成素(Erythropoietin,EPO)850323为标准试剂,测定正常人、贫血病人血清EPO浓度。实验用妊娠13～15d小鼠胎肝细胞。血清均经透析处理,培养液中加量最大不超过10％。EPO(850323)在培养液中浓度为2.5～100mU/ml。血清EPO(mU/ml)测定结果:28例正常人为48.O±17.7,12例再生障碍性贫血病人为946～>10000,1例巨幼细胞性贫血病人为500,1例缺铁性贫血病人为400和18例慢性肾功能衰竭病人则为94.2±87.6。结果表明:贫血病因对血清EPO浓度有影响。     

小叶锦鸡儿的抗炎作用

小叶锦鸡儿可明显对抗角叉菜胶、热烫及巴豆油所致的炎症,抑制小鼠毛细血管通透性、单核巨噬细胞系统的吞噬功能、肉芽组织增生及大鼠炎症部位PGE₂的合成和释放。     

Cannabinoid receptor down-regulation without alteration of the inhibitory effect of CP 55,940 on adenylyl cyclase in the cerebellum of CP 55,940-tolerant mice

The objective of this study was to determine whether the development of tolerance to CP 55,940, a potent cannabinoid agonist, was due to changes in the receptor or second messenger system. ICR mice treated with CP 55,940 (2 mg/kg) twice a day for 6 and one-half days developed a high degree of tolerance to the pharmacological effects of CP 55,940. The ability of CP 55,940 to produce motor hypoactivity, hypothermia and immobility was reduced 163-, 97- and 19-fold, respectively. Evaluation of 3H-CP 55,940 binding to rat brain membranes indicated no difference in receptor affinity between the vehicle- and CP 55,940-treated animals. However, these binding studies revealed a 50% decrease in receptor number in the cerebellum of the CP 55,940-tolerant mice. Although cAMP is generally considered to be the second messenger for cannabinoid receptors, little difference was observed in the inhibitory effects of CP 55,940 on adenylyl cyclase activity in cerebellum between vehicle and drug-treated mice. However, there was an increase in receptor mRNA which suggests a compensation for receptor loss. There are several possible explanations for these results. There may be sufficient spare receptors such that CP 55,940-tolerant mice are capable of producing a maximal effect on the second messenger system. On the other hand, one could conclude that cannabinoid receptor down-regulation does not account for the development of tolerance to all of the effects of CP 55,940 in mice.     

肺癌脑转移83例临床分析

我所内科１９８８￣１９９３年收治肺癌患者１００６例，脑转移８３例，占８．２５％，由于治疗方法不同，其预后极其不同。手术切除加放疗化疗与单纯放疗化疗的生存率有显著性差异（Ｐ〈０．０５），放疗化疗综合组疗效预后好于单一治疗组（Ｐ〈０．０５）。因此在肺癌确诊后应常规作脑影像学检查，可早期诊断，这是提高疗效和生存捏的重要因素。     

蜂王浆冻干粉对小鼠肿瘤的抑制作用

目的研究蜂王浆冻干粉对小鼠肿瘤的抑制作用.方法按每公斤体重0g、0.25g、0.50g、0.75g设对照及低、中、高3个剂量组,经口给予蜂王浆冻干粉30d后,接种小鼠肉瘤180(S180)和艾氏癌腹水型(EAC)两个瘤种.结果在两次重复的小鼠S180和EAC抑瘤试验中发现中剂量组瘤重明显低于阴性对照组(P<0.05),抑制率可达34%;中剂量组荷瘤小鼠平均生存时间均明显高于对照组(P<0.05).结论蜂王浆冻干粉具有抑制肿瘤的作用.     

高渗盐液和抗休克裤合并应用对大鼠早期休克的影响

采用高渗盐液，抗休克裤及两者联用纠正大鼠早期失血性休克。结果显示，单独使用ＡＳＴ，仅见动脉血压短时间回升，而单用ＨＴＳ，血压则明显回升。若先用ＡＳＴ，再注入ＨＴＳ，也能取得明显效果。失血休克大鼠血浆纤维连接蛋白水平显著降低，各组之间均无差异血浆脂质过氧化物－丙二醛的含量明显增加，且在ＨＴＳ组，ＨＴＳ＋ＡＳＴ组与ＮＳ对照组之间有显著差异。     

表小檗碱对α受体的作用

表小檗碱(epiberberine,EB)是从湖北产黄连(Coptis chinensis Franch)中提取的一种生物碱,属苯喹嗪类原小檗碱,对其药理作用的研究资料甚少,未见其对α肾上腺素体作用的报道。资料表明,许多原小檗碱类化合物有α受体阻滞作用,为从该类化合物中选择     

大鼠肝细胞Ⅰ，Ⅲ型前胶原基因表达及PDGF的影响

目的观察大鼠肝细胞Ⅰ，Ⅲ型前胶原基因的表达及ＰＤＧＦ对其表达的影响．方法应用原位杂交技术检测分离培养的ＳＤ大鼠肝细胞（ｎ＝３０）内Ⅰ，Ⅲ型前胶原基因的表达．同时观察１０μｇ／Ｌ（ｎ＝３０）和３０μｇ／Ｌ（ｎ＝３０）ＰＤＧＦ促进前胶原基因表达的作用．测定基因表达颗粒总面积占细胞总面积的百分比，并作比较分析．结果无论正常肝细胞或是在两种浓度的ＰＤＧＦ存在时，肝细胞内均可见到Ⅰ，Ⅲ型前胶原基因的表达．正常肝细胞Ⅰ，Ⅲ型前胶原基因表达面积的百分比（％）为７７±１９和７５±２１；加１０μｇ／ＬＰＤＧＦ后为１１５±１９和１１２±１０，而加３０μｇ／Ｌ后为１５２±３４及１８１±２８，且在后者中表达明显增强（Ｐ＜００５及Ｐ＜００１）．结论ＰＤＧＦ在转录水平上促进肝细胞胶原的合成．