Related Experiment Videos
Rapid and efficient screening for p53 gene mutations by dideoxy fingerprinting
H Blaszyk1, A Hartmann, J J Schroeder
1Mayo Clinic and Foundation, Rochester, MN, USA.
Biotechniques
|February 1, 1995
Summary
Dideoxy fingerprinting (ddF) efficiently detects DNA sequence changes, including mutations in the p53 gene. This method reliably identifies single-base changes and insertions/deletions in cancer research.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Context:
- Dideoxy fingerprinting (ddF) combines aspects of SSCP and Sanger sequencing.
- It analyzes PCR-amplified DNA segments for sequence variations.
- The p53 tumor suppressor gene is frequently altered in various cancers.
Purpose:
- To evaluate dideoxy fingerprinting (ddF) as a screening method for mutations.
- To detect sequence alterations in the p53 tumor suppressor gene in breast cancer.
- To assess ddF's ability to identify single-base mutations, microdeletions, and microinsertions.
Summary:
- Dideoxy fingerprinting (ddF) utilizes a Sanger sequencing reaction with a single dideoxynucleotide and non-denaturing gel electrophoresis.
- The method successfully identified over 100 mutations in the p53 gene, encompassing various mutation types.
- In a prospective study, ddF detected all 25 known mutations in exons 4-10 and flanking regions of p53.
Impact:
- ddF proves to be an efficient and reliable tool for mutation screening in cancer research.
- The method accurately detects heterozygous mutations when bidirectional screening is employed.
- ddF also aids in identifying common polymorphisms within the p53 gene.