Effect of Xpcl1 Activation and p27Kip1 Loss on Gene Expression in Murine Lymphoma
Author Information
Author(s): Kuppers Daniel A., Hwang Harry C., Jackson Aimee L., Linsley Peter S., Clurman Bruce E., Fero Matthew L.
Primary Institution: Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
Hypothesis
The gene expression phenotype associated with p27Kip1 deletion in tumors would reflect an enhancement of the tumor phenotype, or an enhancement of the miRNA or gene expression profile specific to Xpcl1.
Conclusion
The deletion of p27Kip1 may counter an anti-oncogenic pattern of gene expression induced by Xpcl1, rather than enhancing its oncogenic effect.
Supporting Evidence
- Mice lacking p27Kip1 exhibit increased susceptibility to lymphomas.
- Xpcl1 is a common viral integration site in T-cell lymphomas induced by M-MuLV.
- Global miRNA expression profiles were assessed in lymphomas compared to normal thymus.
- Specific microRNAs were over-expressed in lymphomas with viral integrations at the Xpcl1 locus.
- Gene expression was dramatically altered in lymphomas, paralleling data from other T-cell lymphomas.
Takeaway
Researchers studied how changes in certain genes affect lymphoma in mice, finding that losing a specific gene (p27Kip1) changes how other genes behave, which can influence cancer development.
Methodology
The study involved analyzing microRNA and gene expression profiles in T-cell lymphomas induced by M-MuLV in p27Kip1 knockout mice and normal thymus using qPCR and microarray analysis.
Limitations
The assessment did not include a pair-wise comparison of all four subsets of tumor samples based on p27Kip1 and Xpcl1 genotypes due to sample number limitations.
Participant Demographics
Mice used in the study were F1 hybrid (C57BL/6J × 129S4) with varying p27Kip1 genotypes.
Statistical Information
P-Value
p<2×10−16
Statistical Significance
p<2×10−16
Digital Object Identifier (DOI)
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