Jasmine H Francis1, Thomas Wiesner1, Tatyana Milman2, Helen H Won1, Amy Lin3, Vivian Lee4, Daniel M Albert5, Robert Folberg6, Michael F Berger1, Devron H Char7, Brian Marr1, David H Abramson1. 1. Memorial Sloan-Kettering Cancer Center, New York, N.Y., USA. 2. New York Eye and Ear Infirmary, New York, N.Y., USA. 3. University of Illinois Hospital and Health Sciences System, Chicago, Ill., USA. 4. Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pa., USA. 5. McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, Wis., USA. 6. Oakland University William Beaumont School of Medicine, Rochester, Mich., USA. 7. California Pacific Medical Center, San Francisco, Calif., USA.
Abstract
PURPOSE: The aim of this study was to use massively parallel DNA sequencing to identify GNAQ/11, BAP1 and SF3B1 mutations in ophthalmic melanocytoma. PROCEDURES: Six ophthalmic melanocytoma specimens (1 iridociliary and 5 optic nerve) were profiled for genomic alterations in GNAQ/11, BAP1 and SF3B1 using a custom deep sequencing assay. This assay uses solution phase hybridization-based exon capture and deep-coverage massively parallel DNA sequencing to interrogate all protein-coding exons and select introns. RESULTS: The only iridociliary melanocytoma showed a mutation in GNAQ but not in BAP1. Of the 2 optic-nerve melanocytomas that developed into melanoma, one had a GNAQ mutation and both a BAP1 mutation and monosomy 3. The remaining 3 optic-nerve melanocytomas did not reveal mutations in GNAQ/11 or BAP1. SF3B1 mutations were not detected in any specimen. CONCLUSIONS: The presence of GNAQ mutation in some iridociliary and optic-nerve melanocytomas suggests a possible relationship between ophthalmic melanocytoma and other ophthalmic melanocytic neoplasms. BAP1 mutation may accompany the transformation of ophthalmic melanocytoma to melanoma.
PURPOSE: The aim of this study was to use massively parallel DNA sequencing to identify GNAQ/11, BAP1 and SF3B1 mutations in ophthalmic melanocytoma. PROCEDURES: Six ophthalmic melanocytoma specimens (1 iridociliary and 5 optic nerve) were profiled for genomic alterations in GNAQ/11, BAP1 and SF3B1 using a custom deep sequencing assay. This assay uses solution phase hybridization-based exon capture and deep-coverage massively parallel DNA sequencing to interrogate all protein-coding exons and select introns. RESULTS: The only iridociliary melanocytoma showed a mutation in GNAQ but not in BAP1. Of the 2 optic-nerve melanocytomas that developed into melanoma, one had a GNAQ mutation and both a BAP1 mutation and monosomy 3. The remaining 3 optic-nerve melanocytomas did not reveal mutations in GNAQ/11 or BAP1. SF3B1 mutations were not detected in any specimen. CONCLUSIONS: The presence of GNAQ mutation in some iridociliary and optic-nerve melanocytomas suggests a possible relationship between ophthalmic melanocytoma and other ophthalmic melanocytic neoplasms. BAP1 mutation may accompany the transformation of ophthalmic melanocytoma to melanoma.
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