Insertional activation of c-myc by reticuloendotheliosis virus in chicken B lymphoma: Nonrandom distribution and orientation of the proviruses

R. A. Swift, E. Shaller, R. L. Witter, H. J. Kung

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Chicken syncytial virus, a member of the reticuloendotheliosis virus family, can induce chicken B lymphomas indistinguishable from those caused by avian leukosis virus. Previously, we have demonstrated that the chicken syncytial virus proviruses in these tumors are linked to the proto-oncogene c-myc. We have now determined the arrangement of chicken syncytial virus proviruses in 22 tumors. The results indicate that these proviruses, without exception, are integrated upstream from the second c-myc exon. At least 70% of these insertion sites are clustered in a 0.5-kilobase region immediately preceding the exon. The proviruses are all arranged in the same transcriptional orientation as c-myc. This type of provirus organization bears strong resemblance to that of the avian leukosis virus proviruses involved in c-myc activation.

Original languageEnglish
Pages (from-to)869-872
Number of pages4
JournalJournal of Virology
Issue number3
Publication statusPublished - Jan 1 1985
Externally publishedYes


ASJC Scopus subject areas

  • Immunology

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