Submicroscopic interstitial deletion of the X chromosome explains a complex genetic syndrome dominated by Norrie disease
- 1 January 1986
- journal article
- research article
- Published by S. Karger AG in Cytogenetic and Genome Research
- Vol. 42 (4) , 219-224
- https://doi.org/10.1159/000132282
Abstract
Norrie disease (ND), an X-linked recessive disorder, is characterized by congenital blindness followed by bulbar atrophy. We have examined a three-generation family in which ND is part of a complex X-linked syndrome with severe mental retardation, hypogonadism, growth disturbances, and increased susceptibility to infections as additional features. This syndrome is apparently due to an interstitial deletion, as evidenced by the failure of the L1.28 DNA probe (DXS7 locus, Xp11.3) to detect complementary DNA sequences on the defective X chromosome of an affected male and of several obligatory heterozygotes. Attempts to further define this deletion with other DNA probes from the proximal short arm of the X chromosome or by prometaphase chromosome analysis were unsuccessful.Keywords
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