Human Molecular Genetics, Vol 6, 1657-1665, Copyright © 1997 by Oxford University Press
ML Budarf and BS Emanuel
Based on cytogenetic observations, several syndromes have been previously
identified as microdeletion-based disorders. In this review, recent
progress is presented regarding whether one or multiple genes can be
implicated in the pathogenesis of these segmentally aneusomic syndromes.
The syndromes discussed include Angelman, Alagille, Williams,
Langer-Giedeon, Prader-Willi, Smith-Magenis, Miller-Dieker, and
DiGeorge/velocardiofacial or the 22q11 deletion syndromes. For Angelman and
Alagille syndromes, single genes have been identified, whereas for Williams
and Langer-Giedion syndromes, more than one gene can be implicated.
Although there has been significant progress in dissecting the molecular
basis for the other disorders, the ultimate answer regarding one versus
several genes remains to be determined.
REVIEWS
Progress in the autosomal segmental aneusomy syndromes (SASs): single or multi-locus disorders?
Division of Human Genetics and Molecular Biology, The Children's Hospital of Philadelphia, PA 19104, USA. budarf@cbil.humgen.upenn.edu
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