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首页> 外文期刊>Anticancer Research: International Journal of Cancer Research and Treatment >Differential expression of the drug resistance markers DNA topoisomerase II alpha and glutathione S-transferase-pi in the histological compartments of Wilms' tumors.
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Differential expression of the drug resistance markers DNA topoisomerase II alpha and glutathione S-transferase-pi in the histological compartments of Wilms' tumors.

机译:在Wilms肿瘤的组织学区室中,耐药标记DNA拓扑异构酶IIα和谷胱甘肽S-转移酶-pi的差异表达。

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摘要

More than 80% of the patients presenting with Wilms' tumor can be cured today. Some patients, however, fail to respond to chemotherapy. The objective of this study was to analyze the immunohistochemical distribution of two markers of cytostatic drug resistance, e.g. DNA topoisomerase II alpha (Topo II alpha) and glutathione S-transferase-pi (GST-pi) in 23 Wilms' tumor patients who had undergone an operation between 1984 and 1997. Eight patients had stage I disease, seven stage II, three stage III, four stage IV, and one stage V disease. Five tumors showed high malignancy histology. Investigations were carried out on formalin-fixed and paraffin-embedded tissue sections using the indirect immunoperoxidase method. Topo II alpha was predominantly present in the epithelial components of the specimens. It was more frequently found in anaplastic tumors. There was no difference in the presence of Topo II alpha in the epithelial components between specimens derived from treated and untreated patients. Topo II alpha was, however, less expressed in the blastemal and stromal elements of specimens after preoperative treatment. If GST-pi was present, it was confined to the epithelial components except for one case. While no expression of GST-pi was found in preoperatively untreated Wilms' tumors, it was present in epithelial compartments in 57% of tumors after chemotherapy. In conclusion, preoperative chemotherapy led to compartment-specific alterations in the expression levels of both markers indicating a contribution to treatment response of Wilms' tumors.
机译:今天,有80%的Wilms肿瘤患者可以治愈。但是,有些患者对化疗没有反应。这项研究的目的是分析两种抑制细胞生长的药物耐药性标志物,例如肝细胞癌的免疫组织化学分布。 1984年至1997年间接受手术的23例威尔姆斯肿瘤患者的DNA拓扑异构酶IIα(Topo II alpha)和谷胱甘肽S-转移酶-pi(GST-pi)。8例患者患有I期疾病,7例II期,3期三,四,四期和一,五期疾病。五个肿瘤显示高恶性组织学。使用间接免疫过氧化物酶法对福尔马林固定和石蜡包埋的组织切片进行了研究。 Topo II alpha主要存在于标本的上皮成分中。在间变性肿瘤中更常见。在治疗和未治疗患者的标本之间,上皮成分中Topo IIα的存在没有差异。但是,术前治疗后,Topo II alpha在标本的胚盘和基质成分中表达较少。如果存在GST-pi,则除了一种情况外,它仅限于上皮成分。尽管在术前未治疗的威尔姆斯肿瘤中未发现GST-pi的表达,但化疗后57%的肿瘤在上皮区存在GST-pi的表达。总之,术前化疗导致两种标记物表达水平的区室特异性改变,表明它们对Wilms肿瘤的治疗反应有所贡献。

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