title: Polyoncogenicity and insulinoma-inducing ability of BK Virus, a human Papovavirus, in Syrian golden hamsters.
abstract: Newborn hamsters were inoculated intracerebrally with a series of purified and concentrated BK virus samples originating from a single stock of Gardner's original strain. Most (60-100%) of the hamsters developed various tumors 3-9 months later. The frequent types of tumors were ventricular tumors (choroid plexus papillomas and ependymomas: 7-53%), malignant insulinomas (0-92%), and osteosarcomas (0-50%). The T-antigen was positive in 59 of 60 tumors tested, but the virus was rescued by the cell fusion method from only 1 of 11 cell lines derived from these tumors. The incidence of insulinomas varied greatly with the virus sample; the two samples that showed the highest incidence (47 and 92%) originated from one parental virus stock, and all the other samples with the lower incidences (0-9%) originated from another ancestral stock. These results suggest the presence of a BK virus mutant(s) differing in capacity to induce insulinoma. A functional insulinoma cell line was thus established.
mesh_terms: D007516:Adenoma, Islet Cell / Q000382:microbiology*; D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D001739:BK Virus / Q000276:immunology / Q000472:pathogenicity*; D001932:Brain Neoplasms / Q000382:microbiology; D002460:Cell Line; D002551:Cerebral Ventricle Neoplasms / Q000382:microbiology; D002831:Choroid Plexus; D006224:Cricetinae; D008647:Mesocricetus; D009374:Neoplasms, Experimental / Q000382:microbiology; D012516:Osteosarcoma / Q000382:microbiology; D010190:Pancreatic Neoplasms / Q000382:microbiology; D011120:Polyomavirus / Q000472:pathogenicity*; D014412:Tumor Virus Infections; D014776:Virus Cultivation
chemical_list: D000956:Antigens, Viral