Involvement of patched (PTCH) gene in Gorlin syndrome and related disorders: three family cases
1Department of Molecular Medicine, Rudjer Boskovi Institute, Bijenicka 54, 10000 Zagreb, Croatia.
Aim:
To find genetic alterations in PTC or other genes of the Shh/PTCH pathway in tumorous and non- tumorous samples from three families and to correlate them with the varying expression of disorders in presented nevoid basal cell carcinoma syndrome (NBCCS) phenotypes.
Method:
DNA was extracted from archival paraffin-embedded tissues, tumor tissue or peripheral blood leukocytes, and the loss of heterozygosity (LOH) and single strand conformational polymorphism analysis was performed using PCR with primers for polymorphic 9q22.3 markers (D9S196, D9S287, D9S180, D9S127); PTCH exons 3, 6, 8, 13, 15, 16; and smo (smoothened) exon 1. G-banding tecnique was used for cytogenetic analysis of the peripheral blood lymphocytes.
Results:
We found a LOH for PTCH in several cases and variability in smo in one case. In one case NBCCS could reasonably be ascribed to hemizygous PTCH inactivation, while in other two families this typical correlation between the syndrome phenotype and the observed genetic alterations could not been established.
Conclusions:
Further analysis of relatively sparse cases of NBCCS is needed before the symptoms of the syndrome could be convincingly explained by genetic alterations in the Shh/PTCH signalling pathway.
Insights
Genetic analysis of nevoid basal cell carcinoma syndrome (NBCCS) revealed loss of heterozygosity for PTCH in some cases. However, a direct correlation between genetic alterations and varying NBCCS phenotypes remains unclear, necessitating further research.
Area of Science:
- Genetics
- Molecular Biology
- Dermatology
Background:
- Nevoid basal cell carcinoma syndrome (NBCCS) is a rare genetic disorder.
- The Shh/PTCH signaling pathway plays a crucial role in development and is implicated in NBCCS.
- Understanding the genetic basis of NBCCS is essential for diagnosis and treatment.
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