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A constitutional mutation within the retinoblastoma gene detected by PFGE
Author(s) -
Janson Marie,
Nordenskjöld Magnus
Publication year - 1994
Publication title -
clinical genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 102
eISSN - 1399-0004
pISSN - 0009-9163
DOI - 10.1111/j.1399-0004.1994.tb03981.x
Subject(s) - retinoblastoma , genetics , chromosomal translocation , mutation , biology , gene , chromosome , gene mutation , cancer research
Retinoblastoma may be caused by constitutional mutations in the retinoblastoma gene which segregates as an autosomal dominant inherited predisposition for developing retinoblastoma tumours. Since 75% of these cases are new mutations, there is a need for methods to identify carriers of such germ‐line mutations, so that informed genetic counselling is available to patients and close relatives. We have used pulsed‐field gel electrophoresis in screening 20 unrelated cases with bilateral retinoblastoma. One constitutional mutation could be detected, and was found to be caused by a balanced chromosome (4; 13) translocation with the breakpoint within intron 17 of the retinoblastoma gene.