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Oncogene activation and oncogene cooperation in MMTV-induced mouse mammary cancer
1Howard Hughes Medical Institute, Department of Developmental Biology, Beckman Center, Stanford University, Medical Center, CA 94305-5428, USA.
Abstract:
In this short review, we will give an overview of the various genes that can be activated by insertion of proviral DNA of the mouse mammary tumor virus during the formation of mammary cancer. These genes fall within three families: Wnt genes, FGF genes and Notch-related genes. We will summarize our current understanding of the roles of these genes in tumorigenesis and in normal development, and the mechanisms of action of their gene products. Finally, we will give some examples of cooperation between these genes in various biological settings.
Insights
Mouse mammary tumor virus (MMTV) proviral DNA insertion activates Wnt, FGF, and Notch genes, driving mammary cancer formation. This review details their roles in cancer and development.
Area of Science:
- Molecular biology
- Genetics
- Oncology
Background:
- Mouse mammary tumor virus (MMTV) is a retrovirus known to cause mammary tumors in mice.
- Insertional mutagenesis by MMTV can lead to the activation of host genes, contributing to cancer development.
- Specific gene families have been implicated in MMTV-induced mammary tumorigenesis.
Purpose of the Study:
- To review genes activated by MMTV proviral DNA insertion in mammary cancer.
- To summarize the roles of Wnt, FGF, and Notch gene families in tumorigenesis and normal development.
- To explore the mechanisms of action and cooperation of these gene products.
Main Methods:
- Literature review of studies on MMTV insertional mutagenesis.
- Analysis of gene expression data related to MMTV infection and mammary tumors.
- Synthesis of information on Wnt, FGF, and Notch signaling pathways.
Main Results:
- MMTV insertion activates specific genes within the Wnt, FGF, and Notch families.
- These activated genes play critical roles in both mammary gland development and cancer progression.
- Evidence suggests cooperation between these gene families in promoting tumorigenesis.
Conclusions:
- Activation of Wnt, FGF, and Notch genes by MMTV is a key mechanism in mammary carcinogenesis.
- Understanding these pathways provides insights into normal development and potential therapeutic targets.
- Interactions between these signaling pathways are crucial for tumor formation.