Abstract：
:Individuals with germline mutations in the tumour-suppressor gene CYLD are at high risk of developing disfiguring cutaneous appendageal tumours, the defining tumour being the highly organised cylindroma. Here, we analysed CYLD mutant tumour genomes by array comparative genomic hybridisation and gene expression microarray analysis. CYLD mutant tumours were characterised by an absence of copy-number aberrations apart from LOH chromosome 16q, the genomic location of the CYLD gene. Gene expression profiling of CYLD mutant tumours showed dysregulated tropomyosin kinase (TRK) signalling, with overexpression of TRKB and TRKC in tumours when compared with perilesional skin. Immunohistochemical analysis of a tumour microarray showed strong membranous TRKB and TRKC staining in cylindromas, as well as elevated levels of ERK phosphorylation and BCL2 expression. Membranous TRKC overexpression was also observed in 70% of sporadic BCCs. RNA interference-mediated silencing of TRKB and TRKC, as well as treatment with the small-molecule TRK inhibitor lestaurtinib, reduced colony formation and proliferation in 3D primary cell cultures established from CYLD mutant tumours. These results suggest that TRK inhibition could be used as a strategy to treat tumours with loss of functional CYLD.
journal_name
Oncogenejournal_title
Oncogeneauthors
Rajan N,Elliott R,Clewes O,Mackay A,Reis-Filho JS,Burn J,Langtry J,Sieber-Blum M,Lord CJ,Ashworth Adoi
10.1038/onc.2011.133subject
Has Abstractpub_date
2011-10-13 00:00:00pages
4243-60issue
41eissn
0950-9232issn
1476-5594pii
onc2011133journal_volume
30pub_type
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