【Abstract】Objective To study the effects of arsenic trioxide (As2O3) on inhibiting the proliferation of hepatic carcinoma cell lines. Methods To detect the inhibiting rate of As2O3 and other 6 kinds of anticancer drugs (such as, NOV, ADM, MMC, 5-Fu, DDP and CTX) on hepatic carcinoma cell lines BEL-7404 and SMMC-7721 by using MTT assay. Results As compared with other 6 kinds of anticancer drugs, the inhibiting rate of As2O3 was the highest one (P＜0.01 or P＜0.05). The inhibiting rates of As2O3 in the groups with the concentration above 1.0 μg/ml were no different (P＞0.05). Conclusion As2O3 could inhibit hepatic carcinoma cell lines BEL-7404 and SMMC-7721 effectively in vitro. Drug sensitivity tests of different concentration’s As2O3 should be done in order to select the minimal and effective concentration of arsenic trioxide and reduce the side effects of arsenic trioxide.
Objective To explore the effects of several immunosuppressants on the cell numbers of cultured rat macrophages and Schwann’s cells. Methods The macrophages and Schwann’s cells were cultured from the newborn Wistar rats. Different concentrations of methylprednisolone(10-3, 10－4,10－6 and 10－8 mol/L), CsA(10－5, 10－6, 10－7 and 10－8 mol/L) and FK506(10-6, 10－7, 10－8 and 10－9 mol/L) were administrated to the cells, while control group was given no drugs. Twentyfour, 48 and 72 hours after administration, the cells from different concentrations were measured with MTT methods respectively. Theresults were compared and analyzed statistically. Results Only high concentration methylprednisolone (10-4 mol/L) and a certain range of concentrations of CsA (10-6，10-7 and 10-8 mol/L) and FK506 (10-7,10-8 and 10-9 mol/L) can provide protection to culturedrat macrophages. Under most concentrations, CsA and FK506 had no effects onthe cell number of cultured rat Schwann’s cell. Only with high concentration CsA (10-5 mol/L) and methylprednisolone (10-3 mol/L) could significantly decreased the cell number of Schwann’s cell. Long time (72 hours) and low dosage (10-8 mol/L) administration of methylprednisolone could significantlyprotect Schwann’s cell. Conclusion High concentration methylprednisolone and some certain concentration CsA and FK506 can protect cultured rat macrophages. But high concentration CsA and methylprednisolone prohibit the proliferation of Schwann’s cells. Only long time and low dosage methylprednisolonecan protect cultured rat Schwann’s cells.
目的:探讨重组人IGF-1和生长抑素-14单独及联合应用对甲状腺相关眼病患者眼眶成纤维细胞增殖的影响。方法:体外培养甲状腺相关眼病患者眼眶成纤维细胞,采用四甲基偶氮唑盐(MTT)比色法检测不同浓度及作用时间的重组人IGF-1和生长抑素-14对细胞增殖的作用。结果:50μg/L以上浓度IGF-1对眼眶成纤维细胞有促增殖作用,5nmol/L以上浓度的SST对眼眶成纤维细胞的生长有抑制作用,均呈量效和时效关系。IGF-1和SST联合应用时, 50nmol/L以上的SST能阻断100μg/L的IGF-1促细胞增殖的作用。结论:IGF-1可刺激眼眶成纤维细胞增殖。SST能抑制眼眶成纤维细胞增殖,并能阻断IGF-1促进细胞增殖的作用,此抑制作用与浓度有关,提示SST能直接通过受体后机制抑制IGF-1诱导的眼眶成纤维细胞增殖。