Pigment epithelium-derived factor （PEDF） is an antiangiogenic factor which is effective in tumour inhibition in a variety of tumours and has not yet been studied in bladder tumour before. In this study the expressio...Pigment epithelium-derived factor （PEDF） is an antiangiogenic factor which is effective in tumour inhibition in a variety of tumours and has not yet been studied in bladder tumour before. In this study the expression of PEDF, interleukin-1α （IL-1α） and -8 （IL-8） in bladder tumours was investigated. Immunohistochemistry was performed on 64 bladder tumour and 23 normal uroepithelium samples. Expression change of the factors was compared with clinicopathological parameters. Correlations between PEDF, IL-1α and IL-8 were analyzed. None of the factors was in relation to gender, tumour occurrence, and size or onset pattern. PEDF （P=0.014） and IL-1α （P=0.049） expression was down-regulated with grade progression. PEDF expression was lower in normal uroepithelium than in papillary urothelial neoplasm of low malignant potential （PUNLMP） （P=0.000） and carcinoma （P=0.009） whilst IL-1α （P=0.000 and P=0.000 respectively） and IL-8 （P=0.000 and P=0.023 respectively） expression was higher in the same grouping. PEDF expression had a negative correlation with IL-8 in PUNLMP （P=0.049, r=-0.578） as well as in tumour grouping （P=0.033, r=-0.276）. Deranged expressional change of PEDF, IL-1α and IL-8 could be in relation to loss of differentiation from normal uroepithelium to papillary lesion and eventually to carcinoma.展开更多
目的:探讨克林霉素对穿通支原体(Mycoplsama penetrans,Mpe)诱导免疫缺陷小鼠膀胱移行细胞癌凋亡相关蛋白表达的影响。方法:50只ICR免疫抑制小鼠,分克林霉素干预试验组(n=20只)上行感染0.1 ml Mpe(6×108-9/ml),连续3天,同时肌肉注...目的:探讨克林霉素对穿通支原体(Mycoplsama penetrans,Mpe)诱导免疫缺陷小鼠膀胱移行细胞癌凋亡相关蛋白表达的影响。方法:50只ICR免疫抑制小鼠,分克林霉素干预试验组(n=20只)上行感染0.1 ml Mpe(6×108-9/ml),连续3天,同时肌肉注射克林霉素(25 mg/kg.d),连续保护4天;Mpe非干预对照组(n=20)上行感染相同菌量Mpe,连续3天;NS对照组(n=10)上行感染相同剂量的NS,连续3天。各组在8、18周分批宰杀,取8周小鼠血清Mpe再培养,观察8周、18周小鼠膀胱超微结构的形态学改变,同时用免疫组化检测凋亡相关蛋白Bcl-2及Bax表达的变化。结果:克林霉素干预组较非干预组Mpe菌落显著减少。光镜和电镜结果显示克林霉素干预组小鼠的膀胱组织超微结构未见多核仁等分裂相。免疫组化显示克林霉素干预组较非干预组小鼠膀胱移行上皮细胞凋亡相关蛋白Bcl-2表达显著降低(P<0.05),Bcl-2/Bax比值降低。结论:克林霉素可降低膀胱移行上皮细胞Bcl-2的表达,此结果提示克林霉素对穿通支原体诱导小鼠膀胱移行上皮细胞癌具有一定干预作用。展开更多
Arsenic is a well-known human bladder and liver carcinogen, but its exact mechanism of carcinogenicity is not fully understood. Dimethylarsinic acid（DMAV） is a major urinary metabolite of sodium arsenite（i As~Ⅲ） ...Arsenic is a well-known human bladder and liver carcinogen, but its exact mechanism of carcinogenicity is not fully understood. Dimethylarsinic acid（DMAV） is a major urinary metabolite of sodium arsenite（i As~Ⅲ） and induces urinary bladder cancers in rats. DMAVand i As~Ⅲare negative in in vitro mutagenicity tests. However, their in vivo mutagenicities have not been determined. The purpose of present study is to evaluate the in vivo mutagenicities of DMAVand i As~Ⅲin rat urinary bladder epithelium and liver using gpt delta F344 rats.Ten-week old male gpt delta F344 rats were randomized into 3 groups and administered 0,92 mg/L DMAV, or 87 mg/L i As~Ⅲ（each 50 mg/L As） for 13 weeks in the drinking water. In the mutation assay, point mutations are detected in the gpt gene by 6-thioguanine selection（gpt assay） and deletion mutations are identified in the red/gam genes by Spi-selection（Spi-assay）. Results of the gpt and Spi-assays showed that DMAVand i As~Ⅲhad no effects on the mutant frequencies or mutation spectrum in urinary bladder epithelium or liver. These findings indicate that DMAVand i As~Ⅲare not mutagenic in urinary bladder epithelium or liver in rats.展开更多
基金sponsored in part by Science and Technology Commission of Shanghai Municipality, China (No. 07ZR14018)
文摘Pigment epithelium-derived factor （PEDF） is an antiangiogenic factor which is effective in tumour inhibition in a variety of tumours and has not yet been studied in bladder tumour before. In this study the expression of PEDF, interleukin-1α （IL-1α） and -8 （IL-8） in bladder tumours was investigated. Immunohistochemistry was performed on 64 bladder tumour and 23 normal uroepithelium samples. Expression change of the factors was compared with clinicopathological parameters. Correlations between PEDF, IL-1α and IL-8 were analyzed. None of the factors was in relation to gender, tumour occurrence, and size or onset pattern. PEDF （P=0.014） and IL-1α （P=0.049） expression was down-regulated with grade progression. PEDF expression was lower in normal uroepithelium than in papillary urothelial neoplasm of low malignant potential （PUNLMP） （P=0.000） and carcinoma （P=0.009） whilst IL-1α （P=0.000 and P=0.000 respectively） and IL-8 （P=0.000 and P=0.023 respectively） expression was higher in the same grouping. PEDF expression had a negative correlation with IL-8 in PUNLMP （P=0.049, r=-0.578） as well as in tumour grouping （P=0.033, r=-0.276）. Deranged expressional change of PEDF, IL-1α and IL-8 could be in relation to loss of differentiation from normal uroepithelium to papillary lesion and eventually to carcinoma.
文摘目的:探讨克林霉素对穿通支原体(Mycoplsama penetrans,Mpe)诱导免疫缺陷小鼠膀胱移行细胞癌凋亡相关蛋白表达的影响。方法:50只ICR免疫抑制小鼠,分克林霉素干预试验组(n=20只)上行感染0.1 ml Mpe(6×108-9/ml),连续3天,同时肌肉注射克林霉素(25 mg/kg.d),连续保护4天;Mpe非干预对照组(n=20)上行感染相同菌量Mpe,连续3天;NS对照组(n=10)上行感染相同剂量的NS,连续3天。各组在8、18周分批宰杀,取8周小鼠血清Mpe再培养,观察8周、18周小鼠膀胱超微结构的形态学改变,同时用免疫组化检测凋亡相关蛋白Bcl-2及Bax表达的变化。结果:克林霉素干预组较非干预组Mpe菌落显著减少。光镜和电镜结果显示克林霉素干预组小鼠的膀胱组织超微结构未见多核仁等分裂相。免疫组化显示克林霉素干预组较非干预组小鼠膀胱移行上皮细胞凋亡相关蛋白Bcl-2表达显著降低(P<0.05),Bcl-2/Bax比值降低。结论:克林霉素可降低膀胱移行上皮细胞Bcl-2的表达,此结果提示克林霉素对穿通支原体诱导小鼠膀胱移行上皮细胞癌具有一定干预作用。
基金supported by a Grant from the Food Safety Commission, Cabinet Office, Japan (Research Program for Risk Assessment Study on Food Safety, No. 1407)
文摘Arsenic is a well-known human bladder and liver carcinogen, but its exact mechanism of carcinogenicity is not fully understood. Dimethylarsinic acid（DMAV） is a major urinary metabolite of sodium arsenite（i As~Ⅲ） and induces urinary bladder cancers in rats. DMAVand i As~Ⅲare negative in in vitro mutagenicity tests. However, their in vivo mutagenicities have not been determined. The purpose of present study is to evaluate the in vivo mutagenicities of DMAVand i As~Ⅲin rat urinary bladder epithelium and liver using gpt delta F344 rats.Ten-week old male gpt delta F344 rats were randomized into 3 groups and administered 0,92 mg/L DMAV, or 87 mg/L i As~Ⅲ（each 50 mg/L As） for 13 weeks in the drinking water. In the mutation assay, point mutations are detected in the gpt gene by 6-thioguanine selection（gpt assay） and deletion mutations are identified in the red/gam genes by Spi-selection（Spi-assay）. Results of the gpt and Spi-assays showed that DMAVand i As~Ⅲhad no effects on the mutant frequencies or mutation spectrum in urinary bladder epithelium or liver. These findings indicate that DMAVand i As~Ⅲare not mutagenic in urinary bladder epithelium or liver in rats.
