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2016 ; 7
(41
): 66569-66585
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Clustered somatic mutations are frequent in transcription factor binding motifs
within proximal promoter regions in melanoma and other cutaneous malignancies
#MMPMID27611953
Colebatch AJ
; Di Stefano L
; Wong SQ
; Hannan RD
; Waring PM
; Dobrovic A
; McArthur GA
; Papenfuss AT
Oncotarget
2016[Oct]; 7
(41
): 66569-66585
PMID27611953
show ga
Most cancer DNA sequencing studies have prioritized recurrent non-synonymous
coding mutations in order to identify novel cancer-related mutations. Although
attention is increasingly being paid to mutations in non-coding regions, standard
approaches to identifying significant mutations may not be appropriate and there
has been limited analysis of mutational clusters in functionally annotated
non-coding regions. We sought to identify clustered somatic mutations (hotspot
regions across samples) in functionally annotated regions in melanoma and other
cutaneous malignancies (cutaneous squamous cell carcinoma, basal cell carcinoma
and Merkel cell carcinoma). Sliding window analyses revealed numerous recurrent
clustered hotspot mutations in proximal promoters, with some specific clusters
present in up to 25% of cases. Mutations in melanoma were clustered within ETS
and Sp1 transcription factor binding motifs, had a UV signature and were
identified in other cutaneous malignancies. Clinicopathologic correlation and
mutation analysis support a causal role for chronic UV irradiation generating
somatic mutations in transcription factor binding motifs of proximal promoters.