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MECHANISMS OF INDUCTION OF SKIN CANCER BY UV RADIATION
Holly Soehnge, Allal Ouhtit and Honnavara N. Ananthaswamy
Department of Immunology, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Blvd., Box 178, Houston, TX 77030
Received 10/20/97 Accepted 10/24/97
TABLE OF CONTENTS
1. Abstract
- 2. Introduction
- 3. Interaction of UV radiation with the skin
- 3.1. The nature of the UV spectrum
- 3.2. UV radiation causes DNA damage and mutations
- 3.3. Mutations can lead to loss of cell cycle control and carcinogenesis
- 3.4. DNA repair and apoptosis are defenses against carcinogenesis
- 4. Tumor suppressor genes and oncogenes in skin cancer
- 4.1. The p53 tumor suppressor gene
- 4.1.1. p53 and the cell cycle
- 4.1.2. p53 and apoptosis
- 4.1.3. Inactivation of p53 gene
- 4.1.4. p53 mutations in UV-induced skin cancers
- 4.1.5. p53 mutations arise early during UV skin carcinogenesis
- 4.2. The patched (ptc) gene is a tumor suppressor in humans
- 4.2.1. ptc gene activity is conserved in Drosophila and vertebrates
- 4.2.2. ptc mutations and nevoid basal cell carcinoma syndrome
- 4.2.3. UV-induced patched mutations play a role in BCC development
- 4.3. The role of ras oncogenes in skin cancer
- 5. A model for UV-induction of skin cancer
- 6. Perspective
- 7. Acknowledgments
- 8. References
- 9. Entire manuscript
Key words: Sunlight, UV Carcinogenesis, Mutation, Tumor Suppressor Genes, Oncogenes, P53, Patched, Ras, Immunosuppression
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