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Query: UMLS:C0029463 (osteosarcoma)
 16,637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Simian virus 40 (SV40) is an oncogenic virus which induces tumors in hamsters and transforms human cells in tissue culture. Between 1955 and 1963, polio vaccines and adenovaccines were contaminated with SV40; therefore, millions of people were exposed to this oncogenic virus. The SV40 proteins responsible for in vivo oncogenesis and in vitro cell transformation are encoded by the early region of the virus. These proteins are called T (tumor) antigens (Tags), because animals with tumors induced by SV40 have antibodies against these viral proteins. Recently, we and other research laboratories have found SV40 in specific types of human tumors: mesothelioma, ependymoma and choroid plexus tumors, osteosarcoma and sarcoma. The same tumor types will develop in hamsters which have been injected systemically with SV40. SV40 causes cell transformation in tissue culture and tumors in animals, because SV40 Tag binds and inactivates the cellular tumor suppressor gene products, Rb and p53. We found that SV40 Tag binds p53 and Rb in human mesotheliomas, possibly contributing to the malignant phenotype.
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PMID:The biological activities of simian virus 40 large-T antigen and its possible oncogenic effects in humans. 968 8

Deoxyribonucleic acid (DNA) oncoviruses can induce neoplastic transformation by interfering with proliferative proteins. Simian virus 40 (SV40) has been shown to induce brain tumors, osteosarcoma, lymphoid tumors and malignant mesothelioma in hamsters and SV40-like DNA sequences corresponding to the Rb-pocket binding domain of SV40 T-antigen (Tag) have been detected in the same human tumors. Since only a small percentage of people exposed to asbestos fibers develop a malignant mesothelioma, SV40 has been suspected to co-operate with the fibers in the neoplastic transformation or even to itself induce the onset of malignant mesothelioma in patients without expositive history. The mechanism that seems to be involved in the SV40-induced carcinogenesis process is mediated by interaction of Tag, both with p53 and Rb proteins, leading to their functional inactivation that is responsible for the removal of their inhibitory cell cycle effect which determines the increase of the number of cells entering the G1-S phase. Up to now the source of SV40 human infections has not yet been completely identified even though administration from 1957-1965 of SV40 contaminated polio vaccines is highly suspected. Horizontal infection by sexual transmission has been also hypothesized. Due to the important public health implications further investigations are required in order to establish both the source and the carcinogenetic role of simian virus 40 in humans.
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PMID:Simian virus 40 and human cancer. 968 9

U.S. polio vaccines produced during the 1950s were potentially contaminated by simian virus 40 (SV40). Recently DNA from SV40 has been detected in brain ependymoma, pleural mesothelioma and osteosarcoma. In 1957, when national polio vaccination was started in Sweden, vaccine potentially contaminated with SV40 was given to approximately 700,000 individuals, mainly pre-school and school children born between 1946 and 1953. From 1958, a Swedish inactivated polio vaccine was exclusively used, which has been claimed to be free of SV40. We explored cancer incidence rates in the cohorts exposed to the potentially contaminated polio vaccines in Sweden. The Swedish Cancer Registry provided annual cancer incidence rates in five-year age groups for the years 1960-93. Cancer incidence in cohorts maximally exposed was followed during this period, and the incidence when these cohorts reached a specific age was compared to the incidence when unexposed cohorts reached the same age. For osteosarcoma and brain ependymoma overall age-standardised incidence rates were essentially unchanged between 1960 and 1993, and age specific rates were similar in the exposed and unexposed male and female cohorts. During the same period, overall age standardised incidence rates in males of brain cancers increased from 9.0 to 13.1 and of pleural mesotheliomas from 0.2 to 2.1 per 100,000. None of these increased rates was associated with the exposed cohorts. The use of potentially SV40 contaminated inactivated polio vaccines in Sweden has not been shown to be associated with increased cancer incidence. However, the exposed cohorts have not yet reached the age of increased risk of brain cancer or mesothelioma.
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PMID:Potential exposure to SV40 in polio vaccines used in Sweden during 1957: no impact on cancer incidence rates 1960 to 1993. 977 44