JOURNAL ARTICLE

Large genomic rearrangements in NIPBL are infrequent in Cornelia de Lange syndrome

Zahurul A Bhuiyan, Helen Stewart, Egbert J Redeker, Marcel M A M Mannens, Raoul C M Hennekam
European Journal of Human Genetics: EJHG 2007, 15 (4): 505-8
17264868
Cornelia de Lange Syndrome (CdLS) is a multiple congenital anomaly syndrome characterized by a distinctive facial appearance, malformations of the upper limbs, and delay in growth and development. Mutations in NIPBL are associated with CdLS in 27-56% of cases and have been reported as point mutations, small insertions and deletions in coding regions, regulatory regions and at splice junctions. All previous studies used PCR-based exon-scanning methodologies that do not allow detection of large genomic rearrangements. We studied the relative copy number of NIPBL exons in a series of 50 CdLS probands, negative for NIPBL mutations, by multiplex ligation-dependent probe amplification (MLPA). In a single patient, we found a 5.2 kb deletion encompassing exons 41-42 of NIPBL. Our studies indicate that large NIPBL rearrangements do occur in CdLS but are likely to be infrequent events.

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