title: Congenital diaphragmatic hernia and chromosome 15q26: determination of a candidate region by use of fluorescent in situ hybridization and array-based comparative genomic hybridization.
abstract: Congenital diaphragmatic hernia (CDH) has an incidence of 1 in 3,000 births and a high mortality rate (33%-58%). Multifactorial inheritance, teratogenic agents, and genetic abnormalities have all been suggested as possible etiologic factors. To define candidate regions for CDH, we analyzed cytogenetic data collected on 200 CDH cases, of which 7% and 5% showed numerical and structural abnormalities, respectively. This study focused on the most frequent structural anomaly found: a deletion on chromosome 15q. We analyzed material from three of our patients and from four previously published patients with CDH and a 15q deletion. By using array-based comparative genomic hybridization and fluorescent in situ hybridization to determine the boundaries of the deletions and by including data from two individuals with terminal 15q deletions but without CDH, we were able to exclude a substantial portion of the telomeric region from the genetic etiology of this disorder. Moreover, one patient with CDH harbored a small interstitial deletion. Together, these findings allowed us to define a minimal deletion region of approximately 5 Mb at chromosome 15q26.1-26.2. The region contains four known genes, of which two--NR2F2 and CHD2--are particularly intriguing gene candidates for CDH.
authors.affiliation: Department of Paediatric Surgery, Erasmus Medical Centre, Rotterdam, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Klaassens
authors.forename: M
authors.initials: M
authors.lastname: van Dooren
authors.forename: H J
authors.initials: HJ
authors.lastname: Eussen
authors.forename: H
authors.initials: H
authors.lastname: Douben
authors.forename: A T
authors.initials: AT
authors.lastname: den Dekker
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.forename: P K
authors.initials: PK
authors.lastname: Donahoe
authors.forename: R J
authors.initials: RJ
authors.lastname: Galjaard
authors.forename: N
authors.initials: N
authors.lastname: Goemaere
authors.forename: R R
authors.initials: RR
authors.lastname: de Krijger
authors.forename: C
authors.initials: C
authors.lastname: Wouters
authors.forename: J
authors.initials: J
authors.lastname: Wauters
authors.forename: B A
authors.initials: BA
authors.lastname: Oostra
authors.forename: D
authors.initials: D
authors.lastname: Tibboel
authors.forename: A
authors.initials: A
authors.lastname: de Klein
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D002872:Chromosome Deletion; D002884:Chromosomes, Human, Pair 15; D006548:Hernia, Diaphragmatic / Q000235:genetics*; D065630:Hernias, Diaphragmatic, Congenital; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D020411:Oligonucleotide Array Sequence Analysis