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. 1980 Jun 1;151(6):1493–1503. doi: 10.1084/jem.151.6.1493

Erythroleukemia induction by replication-competent type C viruses cloned from the anemia- and polycythemia-inducing isolates of Friend leukemia virus

PMCID: PMC2185877  PMID: 6247414

Abstract

In this study, the biological properties of the replication-competent viruses, F-MuLVA, present in the anemia-inducing isolate of Friend leukemia virus complex (FV-A); and F-MuLVP, present in the polycythemia- inducing isolate of Friend leukemia virus complex (FV-P) have been examined. BALB/c mice infected as newborns with clonal isolates of F- MuLVA or F-MuLVP become anemic and show splenic enlargement characterized by an increased proportion of cells that resemble immature nucleated erythroid cells. In addition, the spleens of these F- MuLVA- or F-MuLVP-infected mice contain a markedly increased proportion of both erythropoietin-dependent erythroid progenitor cells and spectrin-containing erythroid cells. These results suggest that Friend murine leukemia virus (F-MuLV) by itself can induce an erythroleukemic transformation in newborn BALB/c mice similar to that induced by the anemia-inducing spleen focus-forming virus (SFFVA) in newborn or adult mice. Kinetic studies indicated that the alterations in hemopoietic cell populations induced by F-MuLVA or F-MuLVP in newborn BALB/c mice occurred more slowly than the rapid changes observed after infection with FV-A. In addition, adult BALB/c mice were fully susceptible to the erythroleukemic transformation induced by either SFFVA or SFFVP, whereas only newborn mice were susceptible to F-MuLV. Taken together, these results suggest that, although the replication-defective Friend spleen focus-forming viruses appear to be the major determinant of erythroleukemia induction in adults, the replication-competent helper F- MuLV also have erythroleukemic potential when assayed in newborn animals.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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