Detection of CFTR mutations using temporal temperature gradient gel electrophoresis.
Cystic fibrosis (CF), caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, is one of the most common autosomal recessive diseases with variable incidences and mutation spectra among different ethnic groups. Current commercially available mutation panels designed for the analysis of known recurrent mutations have a detection rate between 38 to 95%, depending upon the ethnic background of the patient. We describe the application of a novel mutation detection method, temporal temperature gradient gel electrophoresis (TTGE), to the study of the molecular genetics of Hispanic CF patients. TTGE effectively identified numerous rare and novel mutations and polymorphisms. One interesting observation is that the majority of the novel mutations are splice site, frame shift, or nonsense mutations that cause severe clinical phenotypes. Our data demonstrate that screening of the 27 exons and intron/exon junctions of the CFTR gene by TTGE greatly improves the molecular diagnosis of Hispanic CF patients.
Wong
Lee-Jun C
LJ
Institute for Molecular and Human Genetics, Georgetown University Medical Center, Washington, DC 20007, USA. wonglj@georgetown.edu
Alper
Ozgül M
OM
D003550:Cystic Fibrosis / Q000235:genetics*; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D004587:Electrophoresis, Agar Gel / Q000379:methods*; D006630:Hispanic or Latino; D006720:Homozygote; D006801:Humans; D009154:Mutation / Q000235:genetics*; D011110:Polymorphism, Genetic; D013696:Temperature
C505032:CFTR protein, human; D017931:DNA Primers; D019005:Cystic Fibrosis Transmembrane Conductance Regulator