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. 1976 Dec;73(12):4680–4684. doi: 10.1073/pnas.73.12.4680

Changes in expression of murine leukemia virus antigens and production of xenotropic virus in the late preleukemic period in AKR mice.

K Kawashima, H Ikeda, J W Hartley, E Stockert, W P Rowe, L J Old
PMCID: PMC431595  PMID: 188051

Abstract

We recently reported that thymocytes from 6-month-old preleukemic AKR mice express higher levels of murine leukemia virus (MuLV)-related antigens that thymocytes from 2-month-old mice. We have now found that the level of xenotropic MuLV (defined operationally as MuLV able to infect mink cell cultures) is also markedly increased in thymus of 6-month-old AKR mice and that this increase in virus correlates closely with increased MuLV-antigen expression. There is no increase of MuLV antigen or xenotropic virus in spleen or lymph nodes. Production of ecotropic MuLV remains unchanged with age in thymus, lymph nodes, and spleen. Thymic grafts from 6-month-old AKR mice, but not from 2-month-old mice, induce both amplified MuLV-antigen expression and xenotropic virus production in the thymus of young AKR recipients. Experiments with lethally irradiated AKR mice reconstituted with syngeneic bone marrow cells indicate that age-related changes in the thymus rather than in bone marrow precursor cells are responsible for MuLV-antigen amplification.

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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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