Phenotypic and genetic characterization of patients with features of "nonclassic" forms of cystic fibrosis

Joshua D. Groman, Barbara Karczeski, Molly Sheridan, Terry E. Robinson, M. Daniele Fallin, Garry R. Cutting

Research output: Contribution to journalArticle

Abstract

Objective: To determine which features of incomplete or "nonclassic" forms of cystic fibrosis (CF) are associated with deleterious CF transmembrane conductance regulator gene (CFTR) mutations, and to explore other etiologies for features not associated with deleterious CFTR mutations. Study design: Clinical features were compared between 57 patients with deleterious mutations in each CFTR and 63 with no deleterious mutations. The Shwachman Bodian Diamond syndrome gene (SBDS) was sequenced to search for mutations in patients with no deleterious CFTR mutations and steatorrhea to determine if any had unrecognized Shwachman-Diamond syndrome (SDS). Results: The presence of a common CF-causing mutation, absence of the vas deferens, and Pseudomona aeruginosa in the sputum correlated with the presence of two deleterious CFTR mutations, whereas sweat chloride concentration, diagnostic criteria for CF, and steatorrhea did not. However, sweat chloride concentration correlated with CFTR mutation status in patients infected with P aeruginosa. One patient had disease-causing mutations in each SBDS. Conclusions: Presence of a common CF-causing mutation, absence of the vas deferens and/or P aeruginosa infection in a patient with features of nonclassic CF are predictive of deleterious mutations in each CFTR, whereas steatorrhea in the same context is likely to have etiologies other than CF transmembrane conductance regulator (CFTR) dysfunction.

Original languageEnglish (US)
Pages (from-to)675-680
Number of pages6
JournalJournal of Pediatrics
Volume146
Issue number5
DOIs
StatePublished - May 2005

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Cystic Fibrosis
Mutation
Regulator Genes
Steatorrhea
Cystic Fibrosis Transmembrane Conductance Regulator
Sweat
Chlorides
Sputum
Pseudomonas aeruginosa
Genes

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

Cite this

Phenotypic and genetic characterization of patients with features of "nonclassic" forms of cystic fibrosis. / Groman, Joshua D.; Karczeski, Barbara; Sheridan, Molly; Robinson, Terry E.; Fallin, M. Daniele; Cutting, Garry R.

In: Journal of Pediatrics, Vol. 146, No. 5, 05.2005, p. 675-680.

Research output: Contribution to journalArticle

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T1 - Phenotypic and genetic characterization of patients with features of "nonclassic" forms of cystic fibrosis

AU - Groman, Joshua D.

AU - Karczeski, Barbara

AU - Sheridan, Molly

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AU - Fallin, M. Daniele

AU - Cutting, Garry R.

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