Aberrant SP-B mRNA in lung tissue of patients with congenital alveolar proteinosis (CAP)

Z. Lin, D. E. DeMello, J. R. Batanian, H. M. Khammash, S. DiAngelo, J. Luo, J. Floros

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Mutations in the surfactant protein (SP)-B gene are responsible for SP-B deficiency in congenital alveolar proteinosis (CAP). The multigenerational consanguineous pedigree under study does not carry any of the known mutations, although this pedigree had 14 infant deaths following respiratory distress at birth. Immunostaining of the lungs from three such infants revealed decreased or absent SP-B. By sequencing of SP-B exons, exon-intron junctions, and the 5' and 3' flanking regions, nine polymorphisms were found in this pedigree, but none of them could explain the observed SP-B deficiency. Further analysis of SP-B mRNA by reverse transcription-polymerase chain reaction from paraffin-embedded lung tissue of CAP patients showed that SP-B mRNA is not intact. Although the sequence of mRNA from exon 1-exon 7 and from exon 8-exon 10 could be amplified, the region between exons 7 and 8 could not. From fluorescence in situ hybridization of the short arm of chromosome 2p, only 2 signals were identified, eliminating the possibility of translocation as the cause of the SP-B mRNA aberrance. Although the nature of the genetic basis of SP-B deficiency in this family is currently unknown, the existence of aberrant SP-B mRNA may, at least in part, be responsible for the SP-B deficiency in this pedigree.

Original languageEnglish (US)
Pages (from-to)359-369
Number of pages11
JournalClinical Genetics
Volume57
Issue number5
DOIs
StatePublished - May 18 2000

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Surface-Active Agents
Exons
Lung
Messenger RNA
Pedigree
3' Flanking Region
Mutation
5' Flanking Region
IgA receptor
Fluorescence In Situ Hybridization
Paraffin
Introns
Reverse Transcription
Chromosomes
Parturition
Polymerase Chain Reaction
Congenital Deficiency of Pulmonary Surfactant Protein B
Genes

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

Cite this

Lin, Z. ; DeMello, D. E. ; Batanian, J. R. ; Khammash, H. M. ; DiAngelo, S. ; Luo, J. ; Floros, J. / Aberrant SP-B mRNA in lung tissue of patients with congenital alveolar proteinosis (CAP). In: Clinical Genetics. 2000 ; Vol. 57, No. 5. pp. 359-369.
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Aberrant SP-B mRNA in lung tissue of patients with congenital alveolar proteinosis (CAP). / Lin, Z.; DeMello, D. E.; Batanian, J. R.; Khammash, H. M.; DiAngelo, S.; Luo, J.; Floros, J.

In: Clinical Genetics, Vol. 57, No. 5, 18.05.2000, p. 359-369.

Research output: Contribution to journalArticle

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AU - Lin, Z.

AU - DeMello, D. E.

AU - Batanian, J. R.

AU - Khammash, H. M.

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AU - Floros, J.

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