Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Baba, H. et al.

Two isotypes of murine nm23/nucleoside diphosphate kinase, nm23-M1 and nm23-M2, are involved in metastatic suppression of a murine melanoma line.

A series of sublines of a murine melanoma B16 of C57BL/6 origin were established and examined regarding their metastatic capacity and expression of nm23. The number of pulmonary metastases developed by these sublines was inversely correlated with the expression of two isotypes of nm23, nm23-M1 and nm23-M2. The cDNAs of nm23-M1, nm23-M2, and a combination of both were transfected into the highly metastatic melanoma subline FE7, with low nm23 expression. FE7 transfectants of any of these cDNAs expressed transfected genes, and their metastatic capacity was suppressed when compared with parental FE7 or FE7 transfected with a control neo gene. These cell lines, however, did not change in terms of in vitro growth in the presence of 3 or 10% fetal bovine serum and in vivo growth when injected s.c. into C57BL/6-nu/nu mice. Similar experiments were also performed using FE7 transfectants of human nm23 genes. Transfectants of nm23-H1, nm23-H2, and their combination did not present altered metastatic potential. These findings indicated that two murine isotypes of nm23 but not those of humans are intimately related with the suppression of metastasis in the murine body.[1]

References

Two isotypes of murine nm23/nucleoside diphosphate kinase, nm23-M1 and nm23-M2, are involved in metastatic suppression of a murine melanoma line. Baba, H., Urano, T., Okada, K., Furukawa, K., Nakayama, E., Tanaka, H., Iwasaki, K., Shiku, H. Cancer Res. (1995) [Pubmed]

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