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Rapid screening of phenylketonuria using a CD microfluidic device.

Bin Chen1, Xiaomian Zhou, Chunyu Li

  • 1Department of Laboratory Medicine, Guangzhou First Municipal People's Hospital, Affiliated to Guangzhou Medical College, Guangzhou, Guangdong 510180, China.

Journal of Chromatography. A
|March 5, 2011
PubMed
Summary

This study introduces a compact disc microfluidic chip for rapid phenylketonuria (PKU) screening. The assay offers a fast, low-cost method for detecting PKU mutations using minimal sample volume.

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Area of Science:

  • Biomedical Engineering
  • Genetics
  • Analytical Chemistry

Background:

  • Phenylketonuria (PKU) is a genetic disorder requiring early screening for effective management.
  • Current PKU screening methods can be time-consuming and require specialized equipment.

Purpose of the Study:

  • To develop and validate a novel compact disc (CD) microfluidic chip for rapid DNA hybridization assay-based PKU screening.
  • To assess the feasibility of the CD microfluidic chip for analyzing clinical samples.

Main Methods:

  • A CD microfluidic chip was designed with polydimethylsiloxane (PDMS) and glass layers, incorporating DNA hybridization microchannels.
  • Reciprocating flow was induced via rotation-pause cycles for efficient DNA hybridization.
  • The assay was validated using control samples and applied to 30 clinical samples from pregnant women.

Main Results:

  • The on-chip DNA hybridization assay was completed within 15 minutes, using only 1.5μL of sample.
  • The limit-of-detection (LOD) for DNA template was determined to be 0.7ng/μL.
  • PKU-associated mutations (V245V and R243Q) were identified in clinical samples, with results confirmed by DNA sequencing.

Conclusions:

  • The developed CD microfluidic chip enables rapid, low-cost, and simple PKU screening.
  • This technology shows significant potential as a tool for widespread PKU screening, particularly in resource-limited settings.