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  • 标题:Fv-2 locus controls expression of Friend spleen focus-forming virus-specific sequences in normal and infected mice
  • 本地全文:下载
  • 作者:Tak W. Mak ; Arthur A. Axelrad ; Alan Bernstein
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:1979
  • 卷号:76
  • 期号:11
  • 页码:5809-5812
  • DOI:10.1073/pnas.76.11.5809
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:We have recently demonstrated that normal hemopoietic cells express RNA sequences that are homologous to sequences specific for the Friend erythroleukemia virus genome [Bernstein, A., Gamble, C., Penrose, D. & Mak, T. W. (1979) Proc. Natl. Acad. Sci. USA 76, 4455-4459]. In this communication, we report that the Fv-2 locus, the major genetic determinant controlling host susceptibility to erythroleukemia induction by Friend leukemia virus, also controls the expression of endogenous sequences related to the replication-defective component of Friend leukemia virus, Friend spleen focus-forming virus (SFFV), in normal uninfected mice. Two independent congeneic pairs of mice [C57BL/6 (B6) and B6.S; B6 and B6.C(H-7b)], differing only in a small region of the mouse genome including the Fv-2 locus, were used for this purpose. In both cases, molecular hybridization analysis indicated that the presence of SFFV-related RNA sequences in normal mice was associated with the Fv-2s allele: bone marrow or spleen cellular RNA from Fv-2rr B6 mice contained no detectable SFFV-related sequences, whereas their congeneic Fv-2ss pairs contained relatively high levels of these RNA sequences. The absence of these RNA sequences in Fv-2rr mice was not due to deletion of these sequences from the DNA of Fv-2rr mice. Repopulation of lethally irradiated Fv-2rr mice with syngeneic Fv-2rr bone marrow cells did not lead to any increase in the levels of these SFFV-related RNA sequences, suggesting that the expression of these sequences is still reduced or inhibited in actively cycling Fv-2rr hemopoietic cells. Infection with Friend leukemia virus resulted in the appearance of high levels of RNA homologous to SFFV-specific sequences in the leukemic spleens of B6.S (Fv-2ss) mice, whereas these cellular RNA sequences could not be detected in the spleens of Friend virus-infected B6 (Fv-2rr) mice. The demonstration that the same gene locus controls both the expression of exogenous SFFV-specific sequences and erythroleukemia induction by Friend leukemia virus suggests that these sequences may be necessary for erythroleukemic transformation. In addition, the finding that the Fv-2 gene locus controls the expression of endogenous SFFV-related sequences suggests that these sequences may also be involved in normal hemopoiesis.
  • 关键词:RNA tumor viruses ; erythroleukemia ; gene regulation ; virus susceptibility ; congeneic mice
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