title: Two novel NIPBL gene mutations in Chinese patients with Cornelia de Lange syndrome.
abstract: Cornelia de Lange syndrome (CdLS) is a dominantly inherited developmental disorder characterized by distinctive facial features, mental retardation, and upper limb defects, with the involvement of multiple organs and systems. To date, mutations have been identified in five genes responsible for CdLS: NIPBL, SMC1A, SMC3, RAD21, and HDAC8. Here, we present a clinical and molecular characterization of five unrelated Chinese patients whose clinical presentation is consistent with that of CdLS. There were no chromosomal abnormalities in the five children. In three patients, DNA sequencing revealed a previously reported frameshift mutation c.2479delA (p.Arg827GlyfsX20), and two novel mutations including a heterozygous mutation c.6272 G>T (p.Cys2091Phe) and a frameshift mutation c.1672delA (p.Thr558LeufsX7) in NIPBL. For the remaining patients, large deletions and/or duplications within the NIPBL gene were excluded as playing a role in the pathogenesis, by Multiplex Ligation-dependent Probe Amplification (MLPA) analysis. These findings broaden the mutation spectrum of NIPBL and further our understanding of the diverse and variable effects of NIPBL mutations on CdLS.
authors.affiliation: State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China.
authors.forename: Libin
authors.initials: L
authors.lastname: Mei
authors.affiliation: State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China.
authors.forename: Desheng
authors.initials: D
authors.lastname: Liang
authors.affiliation: State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China.
authors.forename: Yanru
authors.initials: Y
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410078, China. Electronic address: wulingqian126@126.com.
authors.forename: Lingqian
authors.initials: L
authors.lastname: Wu
mesh_terms: D000595:Amino Acid Sequence; D018797:Cell Cycle Proteins; D002648:Child; D002675:Child, Preschool; D002681:China; D004252:DNA Mutational Analysis; D003635:De Lange Syndrome / Q000208:ethnology / Q000235:genetics*; D005091:Exons; D005260:Female; D016368:Frameshift Mutation; D006801:Humans; D007223:Infant; D008297:Male; D008969:Molecular Sequence Data; D009154:Mutation; D010375:Pedigree; D010802:Phylogeny; D011506:Proteins / Q000235:genetics*; D017386:Sequence Homology, Amino Acid
chemical_list: D018797:Cell Cycle Proteins; C487465:NIPBL protein, human; D011506:Proteins
keywords: Cornelia de Lange syndrome; Frameshift mutation; Missense mutation; NIPBL