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1.
盐酸克伦特罗体外抑制大鼠胚胎肢芽细胞增殖和分化的研究 总被引:1,自引:0,他引:1
目的探讨盐酸克伦特罗对大鼠胚胎肢芽细胞的影响。方法采用大鼠胚胎肢芽细胞培养方法,观察盐酸克伦特罗对大鼠胚胎肢芽细胞增殖和分化的影响。结果盐酸克伦特罗对大鼠胚胎肢芽细胞增殖、分化均有抑制作用;细胞增殖:y^=0.507-0.000 7x,r=-0.949(P<0.01);细胞分化:y^=87.63-0.286x,r=-0.945(P<0.01),存在明显的剂量—反应关系,并呈显著性负相关;胚胎肢芽细胞半数抑制细胞增殖浓度(IP50)为0.34μg/L,半数抑制分化浓度(ID50)为0.09μg/L,IP50/ID50=3.78。结论盐酸克伦特罗可抑制大鼠胚胎肢芽细胞增殖和分化作用。 相似文献
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目的建立心房钠尿肽(ANP)基因mRNA表达水平的实时荧光定量PCR检测方法,并对该方法进行初步评价。方法以基因表达产物为模板,建立实时荧光定量PCR检测方法,对样本中的心房钠尿肽含量进行相对定量,比较不同样本组的基因表达水平。结果所建立的实时荧光定量PCR方法熔解曲线中熔解峰单一。肺癌患者胸腔样本的ANP含量为对照样本的4.68倍,血清样本为对照样本的16.03倍。结论所建立的ANP实时荧光定量PCR检测方法具有较高的特异性。肺癌患者胸腔液和血清中ANP的含量明显增高。 相似文献
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自2004年至2006年我院收治的所谓“慢性支气管炎”病人160例,其中被确诊为慢性支气管炎的病人只有40例,支气管炎扩张20例,咳嗽变异型哮喘30例,嗜酸细胞行支气管炎25例,鼻后滴液综合征25例.胃食管返流性咳嗽15例,吸烟5例。为什么会出现这种错误呢?是因为许多医生没有充分理解慢性支气管炎的定义。慢性支气管炎的定义为:慢性咳嗽、咳痰连续2年以上,每年至少3个月,排除其他心肺疾病,临床上很多医生没有意识到排除其他疾病蕴含的真正意义。只要是慢性咳嗽,X线检查没有明显异常,就给病人戴上“慢性支气管炎”这顶帽子。真所滑“慢性支气管炎是个筐.什么都往里面装。所以我们在诊治慢性咳嗽病人时要慎重,要注意以下几个方面的问题。 相似文献
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[目的]探讨3,3-二吲哚基甲烷(3,3-diindolylmethane,DIM)对荷鼻咽癌裸鼠肿瘤体积、丙二醛(Malondiadehycle,MDA)、超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)活力及凋亡相关蛋白-半胱天冬酶-3信号分子的影响.[方法]采用完全随机的方式将48只BALB/C裸小鼠分为DIM低、中、高(0.004 g/kg.b.w、0.02 g/kg.b.w、0.1 g/kg.b.w)剂量组和溶剂对照组(体积分数为0.5%的羧甲基纤维素钠溶液),分别经口灌喂给予实验动物相应剂量的DIM或对照溶液10 d后,于其背部靠腋窝皮下接种人鼻咽癌细胞株CNE1,继续经口灌喂给予实验动物相应剂量的DIM或对照溶液.实验第30天时处死动物,计量肿瘤体积、留取肿瘤组织进行MDA含量、SOD和GSH-Px活力测定、活化型半胱天冬酶-3活性检测.[结果]DIM各剂量可不同程度地抑制肿瘤生长.与对照组比较,高剂量组SOD活力明显升高(P<0.05)、MDA含量明显降低(P<0.05)、GSH-Px活力明显升高(P<0.05).细胞凋亡的关键执行者活化型半胱天冬酶-3(Cleaved Caspase-3)表达随染毒剂量的增加逐渐增强(P<0.05).[结论]3,3-二吲哚基甲烷可抑制肿瘤生长,其机理可能与通过降低MDA含量,提高SOD活力、GSH-Px活力等途径降低氧化应激程度及通过Caspase-3信号分子诱导凋亡的作用相关. 相似文献
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Objective To observe the effects of indole-3-carbinol (I3C) on the outcome of the tumor as well as the changes of the anti-oxidative system in null mice grafted with nasopharyngeal carcinoma. Methods 48 BALB/c null mice were divided by means of random number table into control group (0. 5% sodium carboxyl methyl cellulose),low dosage (0.02 g/kg),middle dosage (0. 1 g/kg) and high dosage(0. 5 g/kg) of I3C. The mice were administered with different solutions by gavage for 10 days before CNEI cells were inoculated subcutaneously into the back (near the armpit) of the nude mice,then the solutions were continually administered by gavage. The tumor volume was measured and the tumor inhibitory rate was calculated. The level of malondialdehyde (MDA),the activity of superoxide dismutases (SOD),the activity of glutathione peroxidase (GSHPx) and the expression of cleaved caspase-3 were determined on the 31th day of the study. Results I3C could reduce the tumor volume [the tumor volumes of the control group,the middle dosage group and the high dosage group were(4. 13±0. 53)×10-6m3, (3.14±0.71)×10-6m3, (2. 72±0. 29)×10-6m3], as compared with the control, the shrinkage of tumor volume of the middle dosage group and the high dosage group were significant (the t valued at 0. 990 and 1.510, P< 0.01). The tumor inhibitory rates of 3 groups were 3.8%,20.5% and 34.9%,respectively. The contents of MDA in the tumor tissue tended to decrease [the values of control group,the low dosage group,the middle dosage group and the high dosage group were(31.29±2. 51)×10-6mol/L, (30. 12±2. 37)×10-6 mol/ L, (23. 32±1.93)×10-6 mol/L, (16.45±1.43)×10-6 mol/L](F=98. 752, P < 0. 01), and that of the high and the middle dosage group could obviously be reduced (t=8. 970,14. 840, P < 0.01) as compared with the control. The activity of SOD seemed to be elevated according to the increase of I3C dosage [the values were (387.24±23.16)×103 U/L, (399. 37±34. 45)×103 U/L, (431.63±31.24)×103 U/L, (476.45±44. 67)×103 U/L](F=53.444,P < 0. 01). When compared with the control, the SOD activity of the middle and the high dosage group be obviously increased (t=44. 390,89. 210,P <0.01). I3C could also elevate the GSHPx activity [the GSHPx values of the four groups were (226. 98±18.35)×103 U/L, (234.65±15.59)×103 U/L, (247.72±22. 73)×103 U/L, (300. 37±26. 02)×103 U/L](F=25.916,P < 0. 01). The GSHPx of the high dosage group was enhanced remarkable(t=73. 390, P < 0. 01) as compared with the control. The expression of cleaved caspase-3 (relative molecular weight=19 000 000) seemed to be elevated according to the increase of I3C dosage and the relative expression levels of wbich were 0. 87±0. 01,0. 97±0. 01,1.02±0. 06 and 1.14±0.02 (F=39. 864, P < 0. 01). When compared with the eontrol,the elevation of this kind of cleaved easpase-3 was considered statistical significant (the t values were 0. 100,0. 086 and 0. 303, respectively, P < 0. 05). When 13C dosage increased, the expression of cleaved caspase-3 (relative molecular weight=17 000 000) seemed to increased too [the relative expression levels of which were 0.00±0.00,0.05±0.02,0. 11±0.02,0.20±0.02(F=56.629,P<0.01)],and the increase of this kind of cleaved caspase-3 was esteemed significantly as compared with those of the control (the t valued at 0. 046,0. 103 and 0. 193, respectively, P < 0. 05). Linear correlate analysis showed that the correlation coefficients between the shrinkage of tumor volume and the expression of the two kinds of cleaved caspase-3 protein was-0.732 (t=3. 404, P < 0. 01) and-0. 901 (t=6. 642, P < 0. 01). Conclusion I3C could reduce the growth of tumor, the mechanism underlie it could be related to the decrease of the content of MDA as well as the elevated levels of SOD,GSHPx,and perhaps could be related to the apoptosis transducted by cleaved caspase-3. 相似文献
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烹饪油烟对大鼠SOD、MDA及免疫器官影响的研究 总被引:1,自引:0,他引:1
目的 :研究烹饪油烟对大鼠血清 SOD (超氧化物歧化酶 )活性、MDA (丙二醛 )含量及免疫器官的影响。方法 :给大鼠分别经腹腔一次注入 80 0 0 mg/ kg、 40 0 0 mg/ kg、 2 0 0 0 mg/ kg的烹饪油烟凝集物 ,同时设对照组 ,6d后颈动脉取血并处死动物 ,测定血清中 SOD活性、 MDA含量 ,观察对免疫器官的影响。结果 :烹饪油烟可使大鼠血清中 SOD活性显著降低 ,MDA含量明显升高 ,与对照组比较 P<0 .0 5及 P<0 .0 1,并对胸腺和脾脏产生不同程度的病理损伤。结论 :烹饪油烟可破坏机体氧化与抗氧化的动态平衡 ,并损及机体免疫器官的结构和功能 相似文献
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