Antisense Tumor Therapy : Activated C-Ha-ras Oncogene in the Mouse
1Department of Pharmacology, Thomas Jefferson University, Philadelphia, PA.
Abstract:
Cancerous cells display overexpression or mutant expression of one or more of the genes normally used in cell proliferation. Such genes are called protoncogenes (1). The imphcation is that the targets that must be attacked in neoplastic cells are normal cellular genes that have sustained some activating lesion. The ras family of mammalian proto-oncogenes includes three members, termed Ha-ras, Ki-ras, and N-ras, that are found to be activated very often in human solid tumors and leukemias (2).
Insights
Cancer cells activate normal genes called proto-oncogenes, like the ras family, which drive cell proliferation. Targeting these activated genes is crucial for treating cancers such as solid tumors and leukemias.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Cancer cells exhibit altered expression of genes involved in normal cell proliferation.
- These genes, known as proto-oncogenes, can become activated through mutations or overexpression.
- The ras family of proto-oncogenes (Ha-ras, Ki-ras, N-ras) is frequently implicated in human cancers.
Purpose of the Study:
- To highlight the role of proto-oncogenes in cancer development.
- To identify activated cellular genes as key targets for neoplastic cell therapy.
- To emphasize the frequent activation of the ras family of proto-oncogenes in human malignancies.
Main Methods:
- Review of existing literature on proto-oncogenes and cancer.
- Analysis of gene expression patterns in cancerous cells.
- Identification of frequently activated gene families in human tumors.
Main Results:
- Proto-oncogenes are identified as critical players in cancer cell proliferation.
- The ras family, including Ha-ras, Ki-ras, and N-ras, shows high activation rates in human solid tumors and leukemias.
- Activated cellular genes represent viable therapeutic targets in neoplastic diseases.
Conclusions:
- Targeting activated proto-oncogenes, particularly the ras family, is a promising strategy for cancer therapy.
- Understanding proto-oncogene activation is fundamental to developing effective cancer treatments.
- The ras family's frequent involvement underscores its significance in oncogenesis.
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