Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

TUMOR INDUCTION BY IMMUNOLOGICALLY ACTIVATED MURINE LEUKEMIA VIRUS

TUMOR INDUCTION BY IMMUNOLOGICALLY ACTIVATED MURINE LEUKEMIA VIRUS A graft-vs.-host reaction (GVHR) was induced in young male CAF I and CB6F 1 mice by the administration of BALB/cJ spleen cells. A proportion of such mice subsequently developed lymphoreticular rumors. Cell-free extracts (CFEs) prepared from the reticular tissues of CAF 1 mice killed at intervals after the induction of the GVHR were tested for their capacity to produce the same tumors in a litter of syngeneic mice inoculated at birth. 12 of 29 (41.4%) such extracts were positive, causing lymphoreticular tumors in one or more littermate recipients. The positive CFEs came from donors killed at all stages of the GVHR, from tumor-bearing mice as well as from non-tumor-bearing mice. However, whereas less than 30% of CFEs from mice killed within 12 mo of GVHR induction were oncogenic, the incidence of oncogenic extracts from mice killed 12–15 mo after GVHR induction rose to 75%. None of the CFEs prepared from nine normal uninjected male CAF 1 mice killed between the ages of 8 and 18 mo transmitted tumors to recipients. CFEs prepared from CAF 1 mice with the GVHR were tested for infectious murine leukemia virus (MuLV) using the XC assay and also for complement-fixing (CF) group-specific MuLV antigen. Substantial titers of B-tropic MuLV and CF antigen were detected in at least half the extracts from mice killed 11–14 mo after GVHR induction. During the first few months of GVHR induction, MuLV titers were low and CF antigen was absent. Neither infectious MuLV nor CF antigen were detected in CFEs prepared from normal control mice. Serially passed CFEs originating from a CB6F 1 GVHR-induced RCN caused similar tumors in successive generations of syngeneic recipient mice. These lymphoreticular tumors were shown to contain infectious MuLV, CF MuLV antigen, and C-type particles. These data together provide evidence that MuLV is activated during the GVHR and that it is responsible for the eventual development of lymphoreticular tumors. Footnotes Submitted: 28 December 1972 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Experimental Medicine Rockefeller University Press

TUMOR INDUCTION BY IMMUNOLOGICALLY ACTIVATED MURINE LEUKEMIA VIRUS

Loading next page...
 
/lp/rockefeller-university-press/tumor-induction-by-immunologically-activated-murine-leukemia-virus-LdYGWXfTHH

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
Rockefeller University Press
Copyright
© 1973 Rockefeller University Press
ISSN
0022-1007
eISSN
1540-9538
DOI
10.1084/jem.137.5.1163
Publisher site
See Article on Publisher Site

Abstract

A graft-vs.-host reaction (GVHR) was induced in young male CAF I and CB6F 1 mice by the administration of BALB/cJ spleen cells. A proportion of such mice subsequently developed lymphoreticular rumors. Cell-free extracts (CFEs) prepared from the reticular tissues of CAF 1 mice killed at intervals after the induction of the GVHR were tested for their capacity to produce the same tumors in a litter of syngeneic mice inoculated at birth. 12 of 29 (41.4%) such extracts were positive, causing lymphoreticular tumors in one or more littermate recipients. The positive CFEs came from donors killed at all stages of the GVHR, from tumor-bearing mice as well as from non-tumor-bearing mice. However, whereas less than 30% of CFEs from mice killed within 12 mo of GVHR induction were oncogenic, the incidence of oncogenic extracts from mice killed 12–15 mo after GVHR induction rose to 75%. None of the CFEs prepared from nine normal uninjected male CAF 1 mice killed between the ages of 8 and 18 mo transmitted tumors to recipients. CFEs prepared from CAF 1 mice with the GVHR were tested for infectious murine leukemia virus (MuLV) using the XC assay and also for complement-fixing (CF) group-specific MuLV antigen. Substantial titers of B-tropic MuLV and CF antigen were detected in at least half the extracts from mice killed 11–14 mo after GVHR induction. During the first few months of GVHR induction, MuLV titers were low and CF antigen was absent. Neither infectious MuLV nor CF antigen were detected in CFEs prepared from normal control mice. Serially passed CFEs originating from a CB6F 1 GVHR-induced RCN caused similar tumors in successive generations of syngeneic recipient mice. These lymphoreticular tumors were shown to contain infectious MuLV, CF MuLV antigen, and C-type particles. These data together provide evidence that MuLV is activated during the GVHR and that it is responsible for the eventual development of lymphoreticular tumors. Footnotes Submitted: 28 December 1972

Journal

The Journal of Experimental MedicineRockefeller University Press

Published: May 1, 1973

There are no references for this article.