TY - JOUR
T1 - Molecular characteristics of conjunctival melanoma using whole-exome sequencing
AU - Swaminathan, Swarup S.
AU - Field, Matthew G.
AU - Sant, David
AU - Wang, Gaofeng
AU - Galor, Anat
AU - Dubovy, Sander R.
AU - Harbour, J. William
AU - Karp, Carol L.
N1 - Funding Information:
includes the following sources: Dr Galor has received support from the Department of Veterans Affairs and Veterans Health Administration; Dr Harbour has received support from the Office of Research and Development via Clinical Sciences Research grants EPID-006-15S and R01 CA125970, as well as a generous gift from Mark J. Daily, MD; Dr Field has received support from the Office of Research and Development via Clinical Sciences Research grant F30 CA206430; and Dr Dubovy has received support from the Florida Lions Eye Bank. Dr Karp has received support from the Ronald and Alicia Lepke Grant, the Lee and Claire Hager Grant, the Jimmy and Gaye Bryan Grant, the Richard Azar Family Grant, the Robert Baer Family Grant, the Emilyn Page and Mark Feldberg Grant, and the Gordon Charitable Trust. Further grants specific to the project include National Institutes of Health Clinical Sciences Research grant R01EY026174, National Institutes of Health Center Core Grant P30EY014801, Department of Defense Grant W81XWH-13-1-0048, an unrestricted grant from Research to Prevent Blindness, and a Richard and Kathy Lesser grant.
Publisher Copyright:
© 2017 American Medical Association. All rights reserved.
PY - 2017/12
Y1 - 2017/12
N2 - IMPORTANCE Conjunctival melanoma (CM) is a highly aggressive ocular cancer for which treatment options are limited; the molecular pathogenesis is poorly understood. OBJECTIVE To identify the molecular characteristics of CMusing next-generation whole-exome sequencing (WES). DESIGN, SETTING, AND PARTICIPANTS Whole-exome sequencingwas performed on tumor DNA extracted from the archived specimens of 5 patients with CM who had been treated with surgical excision between 2006 and 2011. These samples were analyzed at a tertiary academic ocular oncology referral center using a customized bioinformatic pipeline. MAIN OUTCOMES AND MEASURES Sample analyseswere designed to detect driver mutations, chromosome copy number aberrations, and mutation signatures. RESULTS The study's 5 patients ranged in age from 51 to 77 years. Four of the 5 were female, and all were white. Mutations were detected in known oncogenes, including BRAF, NRAS, NF1, EGFR, ALK, TERT, and APC. None of the mutations associated with uveal melanoma were found. All samples demonstrated a C?T mutation signature typical of UV-induced DNA damage. The most common CNA was a gain in chromosome 6p. CONCLUSIONS AND RELEVANCE In these 5 patients, WES allowed identification of mutations that can be targeted with therapy and supported the role of UV light in CM pathogenesis. These findings indicate a need for larger studies to evaluate the diagnostic, prognostic, and therapeutic value of WES for CM.
AB - IMPORTANCE Conjunctival melanoma (CM) is a highly aggressive ocular cancer for which treatment options are limited; the molecular pathogenesis is poorly understood. OBJECTIVE To identify the molecular characteristics of CMusing next-generation whole-exome sequencing (WES). DESIGN, SETTING, AND PARTICIPANTS Whole-exome sequencingwas performed on tumor DNA extracted from the archived specimens of 5 patients with CM who had been treated with surgical excision between 2006 and 2011. These samples were analyzed at a tertiary academic ocular oncology referral center using a customized bioinformatic pipeline. MAIN OUTCOMES AND MEASURES Sample analyseswere designed to detect driver mutations, chromosome copy number aberrations, and mutation signatures. RESULTS The study's 5 patients ranged in age from 51 to 77 years. Four of the 5 were female, and all were white. Mutations were detected in known oncogenes, including BRAF, NRAS, NF1, EGFR, ALK, TERT, and APC. None of the mutations associated with uveal melanoma were found. All samples demonstrated a C?T mutation signature typical of UV-induced DNA damage. The most common CNA was a gain in chromosome 6p. CONCLUSIONS AND RELEVANCE In these 5 patients, WES allowed identification of mutations that can be targeted with therapy and supported the role of UV light in CM pathogenesis. These findings indicate a need for larger studies to evaluate the diagnostic, prognostic, and therapeutic value of WES for CM.
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U2 - 10.1001/jamaophthalmol.2017.4837
DO - 10.1001/jamaophthalmol.2017.4837
M3 - Article
C2 - 29121185
AN - SCOPUS:85039950853
SN - 2168-6165
VL - 135
SP - 1434
EP - 1437
JO - JAMA Ophthalmology
JF - JAMA Ophthalmology
IS - 12
ER -