Related Experiment Videos
Screening for mutations of the apolipoprotein B gene causing hypocholesterolemia
T P Leren1, K S Bakken, V Hoel
1Department of Medical Genetics, Ullevål University Hospital, Oslo, Norway. trond.leren@basalmed.uio.no
Human Genetics
|March 7, 1998
Summary
Researchers analyzed apolipoprotein B gene mutations in 71 Norwegians to understand hypocholesterolemia. A specific mutation (8344T) was more frequent in individuals with low cholesterol levels.
Area of Science:
- Genetics
- Biochemistry
- Molecular Biology
Background:
- Apolipoprotein B (apoB) is crucial for cholesterol transport.
- Genetic variations in the apoB gene can influence cholesterol levels.
- Hypocholesterolemia, or low cholesterol, requires investigation into its genetic underpinnings.
Purpose of the Study:
- To identify mutations in the apolipoprotein B gene associated with hypocholesterolemia in Norwegian subjects.
- To analyze apoB protein and gene variations to understand their role in cholesterol metabolism.
Main Methods:
- Protein analysis using SDS-polyacrylamide gel electrophoresis.
- Gene mutation screening via single-strand conformation polymorphism and DNA sequencing of apoB exon 26.
- Comparison of gene frequencies with a control group of hypercholesterolemic individuals.
Main Results:
- No abnormal apoB molecular weight was detected in the hypocholesterolemic group.
- Seven point mutations in apoB exon 26 were identified, including one novel mutation.
- Mutation 8344T at codon 2712 showed a statistically significant higher frequency in hypocholesterolemic subjects compared to controls.
Conclusions:
- The study identified specific mutations in the apolipoprotein B gene.
- Mutation 8344T is associated with hypocholesterolemia, supporting previous findings.
- Genetic analysis of apoB provides insights into the mechanisms of low cholesterol levels.