p53 Adenovirus as Gene Therapy for Ovarian Cancer
J L Carroll1, J Michael Mathis, M C Bell
1Department of Cellular Biology and Anatomy, and Obstetrics and Gynecology, Louisiana State University Medical Center- Shreveport, Shreveport, LA.
Abstract:
Ovarian cancer arises from the accumulation of mutations in multiple combinations of genes (1). The most extensively studied tumor suppressor gene in solid tumors is p53, a 53-kD nuclear phosphoprotein that binds DNA. The p53 gene product plays a role in normal cellular proliferation by regulating gene transcription, cell cycle control, and apoptosis (2). Mutations of p53 are the most common molecular genetic abnormality to be described in human cancer, and have been identified in malignancies of the breast, colon, lung, esophagus, head and neck, and hematopoietic system (3). Mutations of the p53 gene have been identified in 30 to 79% of epithelial ovarian cancers (4,5). Most of the mutations identified in p53 are distributed throughout the open reading frame as missense mutations. We have identified a missense mutation in the p53 gene in the 2774 ovarian cancer cell line that converts an arginine residue in the DNA binding region of the protein to a histidine residue (6). The mutation in codon 273 we found in 2774 cells is one of the six major hotspots identified for p53 missense mutations (7).
Insights
Researchers identified a specific p53 gene mutation in ovarian cancer cells. This common tumor suppressor gene mutation, a missense mutation in the DNA binding region, is crucial for understanding ovarian cancer development.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Ovarian cancer development involves accumulating gene mutations.
- The p53 gene is a critical tumor suppressor involved in cell cycle control and apoptosis.
- p53 gene mutations are frequent in various cancers, including ovarian cancer.
Purpose of the Study:
- To identify specific p53 gene mutations in ovarian cancer.
- To characterize the nature and location of p53 mutations in ovarian cancer cell lines.
Main Methods:
- Analysis of the p53 gene in the 2774 ovarian cancer cell line.
- Identification of missense mutations within the p53 open reading frame.
Main Results:
- A missense mutation was identified in the p53 gene of the 2774 ovarian cancer cell line.
- This mutation alters an arginine to a histidine in the DNA binding region of the p53 protein.
- The identified mutation is located in a known hotspot for p53 missense mutations.
Conclusions:
- The study identified a specific p53 missense mutation in an ovarian cancer cell line.
- This mutation affects the DNA binding region of the p53 protein.
- The findings contribute to understanding the role of p53 mutations in ovarian carcinogenesis.
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