title: The Shwachman-Bodian-Diamond syndrome gene mutations cause a neonatal form of spondylometaphysial dysplasia (SMD) resembling SMD Sedaghatian type.
abstract: The Shwachman-Bodian-Diamond syndrome (SBDS) gene is a causative gene for Shwachman-Diamond syndrome, an autosomal recessive disorder with exocrine pancreatic insufficiency, bone marrow dysfunction and skeletal dysplasia. We report here on two patients with skeletal manifestations at the severest end of the phenotypic spectrum of SBDS mutations. An 11-year-old Japanese girl presented with neonatal respiratory failure necessitating lifelong ventilation support, severe short stature and severe developmental delay. She developed neutropenia in infancy, and decreased serum amylase was noted in childhood. A British boy was a stillbirth with pulmonary hypoplasia and hepatic fibrosis found on autopsy. Both cases had neonatal skeletal manifestations that included platyspondyly, lacy iliac crests and severe metaphysial dysplasia, and thus did not fall in the range of the known Shwachman-Diamond syndrome skeletal phenotype but resembled spondylometaphysial dysplasia (SMD) Sedaghatian type. The girl harboured a recurrent mutation (183TA-->CT) and a novel missense mutation (79T-->C), whereas the boy carried two recurrent mutations (183TA-->CT and 258+2T-->C). We also examined SBDS in one typical case with SMD Sedaghantian type and eight additional cases with neonatal SMD, but failed to discover SBDS mutations. Our experience expands the phenotypic spectrum of SBDS mutations, which, at its severest end, results in severe neonatal SMD.
authors.forename: Gen
authors.initials: G
authors.lastname: Nishimura
authors.forename: Eiji
authors.initials: E
authors.lastname: Nakashima
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Hirose
authors.forename: Trevor
authors.initials: T
authors.lastname: Cole
authors.forename: Phillip
authors.initials: P
authors.lastname: Cox
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Cohn
authors.forename: David L
authors.initials: DL
authors.lastname: Rimoin
authors.forename: Ralph S
authors.initials: RS
authors.lastname: Lachman
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Bronwyn
authors.initials: B
authors.lastname: Kerr
authors.forename: Sheila
authors.initials: S
authors.lastname: Unger
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Ohashi
authors.forename: Andrea
authors.initials: A
authors.lastname: Superti-Furga
authors.forename: Shiro
authors.initials: S
authors.lastname: Ikegawa
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D000681:Amylases / Q000097:blood / Q000172:deficiency; D002648:Child; D018389:Codon, Nonsense; D004252:DNA Mutational Analysis; D002658:Developmental Disabilities / Q000235:genetics; D004392:Dwarfism / Q000235:genetics; D010188:Exocrine Pancreatic Insufficiency / Q000235:genetics*; D005260:Female; D005804:Genes, Lethal; D005808:Genes, Recessive; D034381:Hearing Loss / Q000235:genetics; D006579:Heterozygote; D006801:Humans; D007231:Infant, Newborn; D008103:Liver Cirrhosis / Q000151:congenital / Q000235:genetics; D008168:Lung / Q000002:abnormalities; D008297:Male; D020125:Mutation, Missense; D009503:Neutropenia / Q000235:genetics*; D010009:Osteochondrodysplasias / Q000145:classification / Q000235:genetics*; D010641:Phenotype; D011506:Proteins / Q000235:genetics* / Q000502:physiology; D012131:Respiratory Insufficiency / Q000235:genetics; D050497:Stillbirth / Q000235:genetics*
chemical_list: D018389:Codon, Nonsense; D011506:Proteins; C470521:SBDS protein, human; D000681:Amylases