This study was designed to explore the possibility of using ascitic mouse sarcoma cell line (S180) to validate the mouse tumor cell attachment assay for developmental toxicants, and to test the inhibitory effects of v...This study was designed to explore the possibility of using ascitic mouse sarcoma cell line (S180) to validate the mouse tumor cell attachment assay for developmental toxicants, and to test the inhibitory effects of various developmental toxicants. The results showed that 2 of 3 developmental toxicants under consideration, sodium pentobarbital and ethanol, significantly inhibited S180cells attachment to Concanavalin A-coaed surfaces. Inhibition was dependent on concentration, and the IC50 (the concentration tha reduced attachment by 50% ), of these 2 chemicals was 1.2×10-3mol/L and 1 .0 mol/L, respectively. Anoher developmental toxiant, hydmiortisone, did not show inhibitory activity. Two non-developmental toxicants, sodium chloride and glycine were also tested and these did not decrease attachment rates. The main results reported here were generally sindlar to those obtained with ascitic mouse ovdrian tumor cells as a model. Therefore, this study added further evidence to the conclusion that cell specificity does not lindt attachment inhibition to Con A-coated surfaces, so S180 cell may serve as an altemative cell model, especially when other cell lines are unavailable. Furthermore, after optimal validation, it can be suggested that an S180 cell attachment assay may be a candidate for a series of assays to detect developmental toxicants.展开更多
目的研究纳米中药对S180荷瘤小鼠肠道菌群的影响及其抑制作用。方法将S180荷瘤瘤株以2×105/(0.2 m l.鼠)用注射器接种于小鼠右前肢腋下,建立实体瘤模型,肿瘤发生率为100%。观察小鼠的一般状态,用梯度稀释法和培养法测定小鼠4种肠...目的研究纳米中药对S180荷瘤小鼠肠道菌群的影响及其抑制作用。方法将S180荷瘤瘤株以2×105/(0.2 m l.鼠)用注射器接种于小鼠右前肢腋下,建立实体瘤模型,肿瘤发生率为100%。观察小鼠的一般状态,用梯度稀释法和培养法测定小鼠4种肠道正常菌群,即乳酸杆菌、双歧杆菌、肠球菌、肠杆菌。用电子天平称瘤重并计算瘤抑制率。病理行HE(苏木精-伊红)染色,在光学显微镜下观察。结果与模型组比较,纳米中药组双歧杆菌和乳酸杆菌数量明显升高,肠球菌和肠杆菌数量明显减少,肿瘤坏死因子数量增加,抑瘤率达64%,病理显示肿瘤组织间坏死灶明显,有大量的炎性细胞浸润。结论纳米中药提高机体免疫屏障功能,增强药物的靶向性,扶植机体正常菌群的生长,实现抗肿瘤的目的。展开更多
文摘This study was designed to explore the possibility of using ascitic mouse sarcoma cell line (S180) to validate the mouse tumor cell attachment assay for developmental toxicants, and to test the inhibitory effects of various developmental toxicants. The results showed that 2 of 3 developmental toxicants under consideration, sodium pentobarbital and ethanol, significantly inhibited S180cells attachment to Concanavalin A-coaed surfaces. Inhibition was dependent on concentration, and the IC50 (the concentration tha reduced attachment by 50% ), of these 2 chemicals was 1.2×10-3mol/L and 1 .0 mol/L, respectively. Anoher developmental toxiant, hydmiortisone, did not show inhibitory activity. Two non-developmental toxicants, sodium chloride and glycine were also tested and these did not decrease attachment rates. The main results reported here were generally sindlar to those obtained with ascitic mouse ovdrian tumor cells as a model. Therefore, this study added further evidence to the conclusion that cell specificity does not lindt attachment inhibition to Con A-coated surfaces, so S180 cell may serve as an altemative cell model, especially when other cell lines are unavailable. Furthermore, after optimal validation, it can be suggested that an S180 cell attachment assay may be a candidate for a series of assays to detect developmental toxicants.
文摘目的研究纳米中药对S180荷瘤小鼠肠道菌群的影响及其抑制作用。方法将S180荷瘤瘤株以2×105/(0.2 m l.鼠)用注射器接种于小鼠右前肢腋下,建立实体瘤模型,肿瘤发生率为100%。观察小鼠的一般状态,用梯度稀释法和培养法测定小鼠4种肠道正常菌群,即乳酸杆菌、双歧杆菌、肠球菌、肠杆菌。用电子天平称瘤重并计算瘤抑制率。病理行HE(苏木精-伊红)染色,在光学显微镜下观察。结果与模型组比较,纳米中药组双歧杆菌和乳酸杆菌数量明显升高,肠球菌和肠杆菌数量明显减少,肿瘤坏死因子数量增加,抑瘤率达64%,病理显示肿瘤组织间坏死灶明显,有大量的炎性细胞浸润。结论纳米中药提高机体免疫屏障功能,增强药物的靶向性,扶植机体正常菌群的生长,实现抗肿瘤的目的。
