Characterisation of retinoblastomas without RB1 mutations: genomic, gene expression, and clinical studies
Characterisation of retinoblastomas without RB1 mutations: genomic, gene expression, and clinical studies
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DOI:
10.1016/s1470-2045(13)70045-7
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发表时间:
2013-04-01
期刊:
影响因子:
51.1
通讯作者:
Gallie, Brenda L.
中科院分区:
文献类型:
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作者:
Rushlow, Diane E.;Mol, Berber M.;Gallie, Brenda L.
Background Retinoblastoma is the childhood retinal cancer that defined tumour-suppressor genes. Previous work shows that mutation of both alleles of the RB1 retinoblastoma suppressor gene initiates disease. We aimed to characterise non-familial retinoblastoma tumours with no detectable RB1 mutations.Methods Of 1068 unilateral non-familial retinoblastoma tumours, we compared those with no evidence of RB1 mutations (RB1(+/+)) with tumours carrying a mutation in both alleles (RB1(-/-)). We analysed genomic copy number, RB1 gene expression and protein function, retinal gene expression, histological features, and clinical data.Findings No RB1 mutations (RB1(+/+)) were reported in 29 (2.7%) of 1068 unilateral retinoblastoma tumours. 15 of the 29 RB1(+/+) tumours had high-level MYCN oncogene amplification (28-121 copies; RB1(+/+) MYCNA), whereas none of 93 RB1(-/-) primary tumours tested showed MYCN amplification (p