[Association of lymphoid malignancy incidence with EB Virus and IL-10 gene polymorphism]

EBV (Epstein-Barr Virus) is a common herpes virus in patient with lymphatic system tumor, which firstly discovered in the cell line of Burkitt's lymphoma. 90% people worldwide had been infected by EB virus before grown-up, but not all people have the EBV-related disease or tumor. Most EBV infection can not elicit clinical symptoms. EBV infection in tumor of lymphatic system is common. It was early known that the EBV existence may cause the immortalization of normal B cells, which like the tumor cells. It means that EBV plays an important role in the tumorigenesis. EBV Bcrf1 code frame is homology to human IL-10, which is also called viral IL-10, showing immunosuppressive effect similar to the IL-10. IL-10 is also an important immunoregulatory factor, the secretory level of which influences the occurrence and development of lymphatic system diseases; the genotype of SNP site in IL-10 promoter region also associates with secretory level of IL-10. This review discusses the close relation between tumor of lymphatic system, EBV infection and gene polymorphism of IL-10.