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Different H2 haplotypes have a strong influence on oncogene action.
1Department of Preventive Medicine, University Medical School of Pécs, Hungary. ember@pubhealth.pote.hu
Anticancer Research
|June 16, 1999
Summary
The H2 complex influences leukemia development. Short-term gene expression changes in mice treated with cyclophosphamide mirrored long-term leukemia outcomes, with H2K showing the most significant alterations.
Area of Science:
- Immunogenetics
- Molecular Biology
- Oncology
Background:
- The H2 complex in mice is crucial for determining susceptibility to viral and chemical leukemogenesis.
- Different H2 haplotypes (H2K, H2d, H2b) exhibit varying resistance or sensitivity to leukemia induction and transplantation.
Purpose of the Study:
- To investigate the effect of the chemical leukemogen cyclophosphamide on onco/suppressor gene expression in CBA/Ca mice.
- To correlate short-term gene expression changes with long-term leukemia induction outcomes.
Main Methods:
- Treatment of CBA/Ca mice with cyclophosphamide.
- Analysis of gene expression for Ha-ras, c-myc, and p53 shortly after carcinogen exposure.
- Comparison of gene expression patterns with established long-term leukemia induction data.
Main Results:
- Gene expression patterns for Ha-ras, c-myc, and p53 in a short-term experiment closely resembled those observed in long-term leukemia induction studies.
- H2K haplotype showed a marked elevation in onco/suppressor gene expression.
- H2b exhibited modest gene expression changes, while H2d remained largely silent.
Conclusions:
- Short-term gene expression analysis can predict long-term susceptibility to chemical leukemogenesis.
- The H2 complex significantly modulates the expression of key oncogenes and tumor suppressor genes in response to chemical carcinogens.