Ultraviolet and ionizing radiation enhance the growth of BCCs and trichoblastomas in patched heterozygous knockout mice
Summary
This summary is machine-generated.Ptch mutant mice develop skin tumors resembling human basal cell carcinoma. Radiation exposure increases tumor growth and alters histology, establishing a new model for studying skin cancer development.
Area Of Science
- Oncology
- Dermatology
- Genetics
Background
- Basal cell carcinomas (BCCs) are common skin cancers with hedgehog signaling pathway abnormalities.
- PTCH gene mutations are frequently observed in BCCs.
Purpose Of The Study
- To establish a mouse model for studying the development of basal cell carcinoma.
- To investigate the role of PTCH gene mutations and radiation in BCC tumorigenesis.
Main Methods
- Development of Ptch+/- mutant mice.
- Exposure of mice to ultraviolet (UV) and ionizing radiation.
- Histological and molecular analysis of tumors.
Main Results
- Ptch+/- mice spontaneously developed primordial follicular neoplasms resembling human trichoblastomas.
- Radiation exposure increased the number and size of these tumors, altering their histology towards BCC.
- Mouse tumors exhibited BCC-like features including loss of hemidesmosomal components, p53 mutations, loss of the remaining Ptch allele, and hedgehog target gene activation.
Conclusions
- Ptch mutant mice provide a novel model for UV and ionizing radiation-induced BCC-like tumors.
- PTCH inactivation and hedgehog target gene activation are critical for BCC development.
View abstract on PubMed