Inorganic cadmium- and arsenite-induced malignant transformation of human bladder urothelial cells

Arsenic and cadmium (Cd(+2)) are human carcinogens, and epidemiological studies have implicated both pollutants in the development of urinary bladder cancer. Despite this epidemiological base, it is unknown if either Cd(+2) or arsenite (As(+3)) can directly cause the malignant transformation of huma...

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Vydáno v:Toxicological sciences Ročník 79; číslo 1; s. 56
Hlavní autoři: Sens, Donald A, Park, Seongmi, Gurel, Volkan, Sens, Mary Ann, Garrett, Scott H, Somji, Seema
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 01.05.2004
Témata:
Agar
Animals
Arsenicals - adverse effects
Cadmium Compounds - adverse effects
Cell Culture Techniques - methods
Cell Division - drug effects
Cell Line
Cell Transformation, Neoplastic - drug effects
Cell Transformation, Neoplastic - pathology
Cell Transformation, Neoplastic - ultrastructure
Dose-Response Relationship, Drug
Humans
Mice
Mice, Nude - genetics
Neoplasm Transplantation - methods
Neoplasm Transplantation - pathology
Neoplasms, Experimental - chemically induced
Neoplasms, Experimental - pathology
Neoplasms, Experimental - ultrastructure
Time Factors
Urinary Bladder - pathology
Urothelium - drug effects
Urothelium - pathology
ISSN:1096-6080
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Shrnutí:Arsenic and cadmium (Cd(+2)) are human carcinogens, and epidemiological studies have implicated both pollutants in the development of urinary bladder cancer. Despite this epidemiological base, it is unknown if either Cd(+2) or arsenite (As(+3)) can directly cause the malignant transformation of human urothelial cells. The goal of this study was to determine if Cd(+2) and/or As(+3) are able to cause the malignant transformation of human urothelial cells. The strategy employed was to expose the nontumorigenic urothelial cell line UROtsa to long-term in vitro exposure to Cd(+2) and As(+3), with the endpoint being the ability of the cells to form colonies in soft agar and tumors when heterotransplanted into nude mice. It was demonstrated that a long-term exposure to either 1 M Cd(+2) or 1 M As(+3) resulted in the selection of cells that were able to form colonies in soft agar and tumors when heterotransplanted into nude mice. The histology of the tumor heterotransplants produced by UROtsa cells malignantly transformed by Cd(+2) had epithelial features consistent with those of a classic transitional-cell carcinoma of the bladder. The histology of the tumor heterotransplants produced by cells malignantly transformed by As(+3) was unique in that the cells displayed a prominent squamoid differentiation.
Bibliografie:ObjectType-Article-1
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ISSN:1096-6080
DOI:10.1093/toxsci/kfh086