阴道霉菌、滴虫双用途快速增殖液的配制和应用

目的 提高由滴虫、霉菌合并感染的慢性阴道炎患者阴道分泌物中病原体的检出率。方法 对 169例慢性阴道炎患者用双份阴道分泌物拭子 ,一份用生理盐水稀释直接涂片镜检 ,寻找有无孢子、假菌丝及滴虫 ;另一份接种于自行研制的增殖液中 ,经 3 5°C培育 8～ 10h ,吸取培养物 ,立刻镜检 ,观察有无孢子、假菌丝及滴虫 ;并比较两种方法霉菌、滴虫合并感染的检出率。结果 经增殖培养可使霉菌、滴虫合并感染的阴道分泌物中的病原体检出率由 10 .7%提高至 2 2 .5 %。结论 阴道霉菌、滴虫双用途快速增殖液配方简单、操作方便、病原体检出率高 ,实现了“一基多用”的目的 。

防霉宝与BF液混用防治油菜菌核病

防霉宝与ＢＦ液混用防治油菜菌核病吴春英，莫乐红，孔金成镇江市植保植检站，丹徒县西麓乡农科站油菜菌核病是油菜上的重要病害，１９９３年～１９９５年连续三年大发生，并有逐年加重的趋势，严重影响了油菜的高产稳产。常年使用多菌灵系列的药剂，其防病增产效果一直不...

运用RAPD法识别杨树品种技术的研究

在正确提取ＤＮＡ后，探讨了在成本最低、效果最好的基础上，得出了ＤＮＡ最佳增殖反应液的组成（１０Ｘｂｕｆｆｅｒ１．５０、ｄｎｔｐｓ ０．３０、ＭｇＣｌ２ ０．６０、灭菌水 １０．５７、Ｐｒｉｍｅｒ１．００、Ｔａｇ０．０３、ＤＮＡ１．００），其次用 ６０个引物对杨柳科属和杨属的 １３个品种进行了人工分析，发现多态标记 ３２个，用其中的任意 １３个标记就能区别 １３品种。

Clinical significance of telomerase activity in peritoneal lavage fluid from patients with gastric cancer and its relationship with cellular proliferation

AIM： To evaluate the efficacy of telomerase activity assay and peritoneal lavage cytology （PLC） examination in peritoneal lavage fluid for the prediction of peritoneal metastasis in gastric cancer patients, and to explore the relationship between telomerase activity and proliferating cell nuclear antigen expression.METHODS： Telomeric repeated amplification protocol （TRAP）-enzyme-linked immunosorbent assay （ELISA） was performed to measure the telomerase activity in 60 patients with gastric cancer and 50 with peptic ulcer. PLC analysis of the 60 patients with gastric cancer was used for comparison. The proliferating cell nuclear antigen （PCNA） in gastric carcinoma was immunohistochemically examined.RESULTS： The telomerase activity and PLC positive rate in peritoneal lavage fluid from patients with gastric cancer was 41.7% （25/60）, and 25.0% （15/60）, respectively. The positive rate of telomerase activity was significantly higher than that Qf PLC in the group of pT, （15/16 vs 9/16, P 〈 0.05）, P1-3 （13/13 vs 9/13, P 〈 0.05） and diffuse type （22/42 vs 13/42, P 〈 0.05）. The patients with positive telomerase activity, peritoneal metastasis, and serosal invasion had significantly higher levels of average PCNA proliferation index （PI）, （55.00 ± 6.59 vs 27.43 ± 7.72, 57.26 ±10.18 vs 29.15 ±8.31, and 49.82 ± 6.74 vs 24.65 ±7.33, respectively, P 〈 0.05）.CONCLUSION： The TRAP assay for telomerase activity is a useful adjunct for cytologic method in the diagnosis of peritoneal micrometastasis and well related to higher proliferating activity of gastric cancer. The results of this study also suggest a promising future therapeutic strategy for treating peritoneal dissemination based on telomerase inhibition.

Impact of Cinobufacini injection on proliferation and cell cycle of human hepatoma HepG-2 cells

Objective： The aim of our study was to investigate the effect of Cinobufacini injection on the proliferation and cell cycle of human hepatoma HepG-2 cells. Methods： Cell proliferation was assessed by MTT assay, cell cycle distribution was detected by the flow cytometry （FCM）. The expression of Cyclin A, CDK2 mRNA levels were examined by RT-PCR. Quantitative colorimetric assay was used to analyze Cyclin NCDK2 activity in HepG-2 cells. Results： Cinobufacini injection significantly inhibited HepG-2 cells proliferation in dose- and time-dependent ways; FCM analysis showed Cinobufacini injection induced cell cycle arrest at S phase; RT-PCR assay showed Cinobufacini injection down-regulated Cyclin A, CDK2 expression at mRNA levels; Quantitative colorimetric assay showed Cinobufacini injection deceased Cyclin NCDK2 activity in HepG-2 cells. Conclusion： Cinobufacini injection can inhibit human hepatoma HepG-2 cells growth, induce cell apoptosis and induce cell cycle arrest at S phase, the mechanism of which might be partly related to the down-regulation of Cyclin A, CDK2 mRNA expression and inhibition of Cyclin A/CDK2 activity.

The impact of Cinobufacini injection on proliferation and apoptosis of human hepatoma HepG-2 cells

Objective： The aim of our study was to investigate the effect of Cinobufacini injection on the proliferat（on and apoptosis of human hepatocarcinoma HepG-2 cells. Methods： Cells proliferation was assessed by MTT assay, cells morphologic was observed by the inverted microscopy, Annexin V/PI stain was used to detect the apoptosis and necrosis of the tumor ceils. The expression of TOPOI mRNA and TOPO Ⅱ mRNAwere examined by RT-PCR. Results： Cinobufacini injection significantly inhibited HepG-2 cells proliferation in dose- and time-dependent ways. After Cinobufacini injection intervention, HepG-2 cells showed typical morphological changes： cells changed from polygon into round, chromatin looseness and karyolysis were observed. The percentages of apoptosis were 88.49%, 76.02%, 61.73% corresponding to the 48 h interference of 0.42 μg/mL, 0.21 μg/mL, 0.105 μg/mL Cinobufacini injection, perspectively. RT-PCR assay showed that Cinobufacini injection down-regulated TOPOI and TOPO Ⅱ expression at mRNA level. Conclusion： Cinobufacini can inhibit human hepatocarcinoma HepG-2 cells growth and induce tumor cells apoptosis, the mechanism of which might partly relate to the down-regulation of TOPOI mRNA and TOPO Ⅰ mRNA induced by Cinobufacini injection.

Studies on Proliferationpromoting Effect of Supernatant from Human Thymic Epithelial Cell Culture on Mouse Thymocyte and Tcell Line

Supernatants from human primary thymic epithelial cell culture were collected. The proliferationpromoting effect of the supernatant on mouse thymocyte, as well as on Tcell line 85, Be 13, HDMar, Peer, Loucy, Molt4, Reh and Jurkat, were observed. The results demonstrated that the supernatants could increase spontaneous 3 HTdR intake of mouse thymocyte, promote ConAinduced thymocyte proliferation and stimulate the proliferation of 85 cell or the cells of HDMar, Loucy and Jurkat at stationary phase, but did not display any effect on Be13, Peer, Molt4 and Reh cells.