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DHPLC in clinical molecular diagnostic services
Kenjiro Kosaki1, Toru Udaka, Torayuki Okuyama
1Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan. kkosaki@sc.itc.keio.ac.jp
Molecular Genetics and Metabolism
|October 6, 2005
Summary
A novel COPPER plate system enables cost-effective, automated mutation scanning for congenital disorders using denaturing HPLC. This method efficiently analyzes multiple gene exons, improving molecular diagnostics for rare diseases.
Area of Science:
- Genetics
- Molecular Biology
- Medical Diagnostics
Background:
- Denaturing high-performance liquid chromatography (DHPLC) offers a high-capacity, low-cost method for mutation scanning.
- Automating and optimizing DHPLC for analyzing multiple gene exons is crucial for efficient genetic diagnostics.
- Congenital disorders require accurate and scalable molecular diagnostic tools.
Purpose of the Study:
- To develop an automated, cost-effective strategy for semi-automated analysis of multiple gene exons using DHPLC.
- To create a user-friendly system for simultaneous amplification and optimized DHPLC analysis of numerous amplicons.
- To establish a robust platform for the molecular diagnosis of over 20 congenital disorders.
Main Methods:
- Developed a PCR protocol for amplifying multiple exons simultaneously under identical conditions.
- Created Condition-Oriented-PCR primer-Embedded-Reactor (COPPER) plates with pre-aliquoted, air-dried primer sets for 96-well format PCR.
- Implemented serial DHPLC analysis optimized for each amplicon, managed by a dedicated computer file for each COPPER plate system.
Main Results:
- Successfully developed COPPER plate systems for over 20 congenital disorders, including Marfan, CHARGE, de Lange, Sotos, and Rubinstein-Taybi syndromes.
- These systems facilitate the simultaneous amplification of multiple exons (e.g., 65 for FBN1, 39 for CHD7, 46 for NIPBL).
- The system is operational in a reference laboratory, analyzing over 200 samples annually for clinical molecular diagnosis of congenital malformation syndromes across Japan.
Conclusions:
- The COPPER plate system provides an efficient, automated, and cost-effective solution for mutation scanning in congenital disorders.
- This method significantly enhances the capacity for molecular diagnosis of a wide range of genetic syndromes.
- The system is validated for high-throughput clinical molecular diagnostics, supporting reference laboratory functions.