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lüll Molecular and clinical perspectives of polyomaviruses: emerging evidence of importance in non-kidney transplant populations Vilchez RA; Kusne SLiver Transpl 2006[Oct]; 12 (10): 1457-63JC virus (JCV), BK virus (BKV) and simian virus 40 (SV40) are deoxyribonucleic acid (DNA) viruses, members of the family Polyomaviridae. These viruses establish persistent infections, and reactivate from latency in their host under immunosuppression. During the last few years there has been recognition of the morbidity related to polyomaviruses, particularly BKV in kidney transplant recipients. More importantly, recent studies indicate the potential implication of JCV, BKV, and SV40 in renal dysfunction among nonrenal organ transplant patients. Polyomaviruses are tumor-inducing viruses and animal models have provided evidence of the oncogenicity of these pathogens. Although data are not conclusive, molecular studies suggest an association of BKV and SV40 with malignancies among solid organ transplant patients. As new and potent immunosuppressive agents are introduced into clinical practice, it is believed that the incidence of polyomavirus-related diseases in organ transplantation might increase. This review evaluates the biologic and epidemiologic features of these 3 viruses, the data regarding their infections in nonkidney organ transplant patients and describes future directions in the management and research of these opportunistic pathogens.|BK Virus/*pathogenicity[MESH]|Humans[MESH]|Immunosuppressive Agents/therapeutic use[MESH]|Incidence[MESH]|JC Virus/*pathogenicity[MESH]|Polyomavirus Infections/*epidemiology/therapy/virology[MESH]|Simian virus 40/*pathogenicity[MESH]|Transplants/*adverse effects[MESH] |