Severe deficiency of cystic fibrosis transmembrane conductance regulator messenger RNA carrying nonsense mutations R553X and W1316X in respiratory epithelial cells of patients with cystic fibrosis. Academic Article uri icon

Overview

MeSH

  • Adolescent
  • Adult
  • Base Sequence
  • Cystic Fibrosis Transmembrane Conductance Regulator
  • Female
  • Humans
  • Male
  • Molecular Sequence Data

MeSH Major

  • Bronchi
  • Cystic Fibrosis
  • Membrane Proteins
  • Mutation
  • Nasal Mucosa
  • RNA, Messenger

abstract

  • Cystic fibrosis (CF) is the most common, lethal inherited disorder in the Caucasian population. We have recently reported two African-American patients with nonsense mutations in each CF gene and severe pancreatic disease, but mild pulmonary disease. In order to examine the effect of these nonsense mutations on CF gene expression, bronchial and nasal epithelial cells were obtained from one of these patients (no. 246), a compound heterozygote for nonsense mutations R553X and W1316X; a healthy normal individual; a patient (no. 528) homozygous for the common CF mutation (delta F508); and a CF patient (no. 272) who carries the R553X mutation and a missense mutation, S549N. When mRNA from bronchial cells of the normal individual, the delta F508 homozygote, and the S549N/R553X compound heterozygote was reverse transcribed and amplified by polymerase chain reaction using primers derived from the CF gene, DNA fragments of the predicted size were observed. However, patient no. 246 with nonsense mutations in each CF gene has no detectable cystic fibrosis transmembrane conductance regulator (CFTR) messenger RNA, and therefore should have severely diminished, and possibly absent, CFTR protein. Furthermore, less than 2% of the CFTR transcripts in nasal epithelial cells from patient no. 272 (S549N/R553X) were derived from the gene with the nonsense mutation. We conclude that severe reduction in CFTR mRNA causes CF, but can have different consequences in the lung and pancreas.

publication date

  • December 1991

has subject area

  • Adolescent
  • Adult
  • Base Sequence
  • Bronchi
  • Cystic Fibrosis
  • Cystic Fibrosis Transmembrane Conductance Regulator
  • Female
  • Humans
  • Male
  • Membrane Proteins
  • Molecular Sequence Data
  • Mutation
  • Nasal Mucosa
  • RNA, Messenger

Research

keywords

  • Journal Article

Identity

Language

  • eng

PubMed Central ID

  • PMC295756

Digital Object Identifier (DOI)

  • 10.1172/JCI115510

PubMed ID

  • 1721624

Additional Document Info

start page

  • 1880

end page

  • 1885

volume

  • 88

number

  • 6