In vivo INDUCTION OF MALIGNANT TRANSFORMATION OF NUDE MOUSE B LYMPHOCYTES BY A HUMAN MULTIPLE MYELOMA

The hone marrow puncture fluid of human multiple myeloma was inoculated subcutaneously in BALB/C/nu nude mice. After passage of the xenograft from nude mice in vitro, a murine malignant lymphosarcoma cell line was unexpectedly established, which was named NLB-SK. The murine NLBSK cell line has been cultivated in vitro over 72 passages for 10 months. Repeated cryopreservation showed that the murine NLB-SK cell line revived satisfactorily. Based on cell biological characteristics the malignant transformation migh the attributed to horizontal oncogenesis between human malignant tumor cells and nude mouse normal somatic cells.