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AOTF-based multicolor fluorescence detection for short tandem repeat (STR) analysis in an electrophoretic

James M Karlinsey1, James P Landers

  • 1Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA. jmk48@psu.edu

Lab on a Chip
|July 25, 2008
PubMed
Summary

A novel acousto-optic tunable filter (AOTF) system enables five-color fluorescence detection for short tandem repeat (STR) analysis on microchips. This advancement integrates advanced multicolor STR genotyping with portable microchip technology.

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Area of Science:

  • Forensic Science
  • Analytical Chemistry
  • Biotechnology

Background:

  • Short tandem repeat (STR) analysis is crucial for human identification.
  • Microchip-based platforms offer portability and reduced sample volume for genetic analysis.
  • Current multicolor detection methods for STR analysis on microchips face limitations.

Purpose of the Study:

  • To develop and demonstrate a single-filter, single-detector acousto-optic tunable filter (AOTF) system for multicolor fluorescence detection.
  • To perform four- and five-color STR analysis on glass microchips.
  • To integrate state-of-the-art multicolor STR kits with microchip technology.

Main Methods:

  • Utilized an acousto-optic tunable filter (AOTF) for multicolor fluorescence detection.
  • Employed AmpFlSTR Profiler Plus, COfiler (four-color), and Identifiler (five-color) STR kits.
  • Generated matrix files and processed raw data to correct for spectral overlap.

Main Results:

  • Successfully performed four- and five-color STR analysis on glass microchips using a single AOTF and detector.
  • Demonstrated the first on-chip five-color genotyping application.
  • Achieved spectral overlap correction for accurate STR analysis.

Conclusions:

  • The AOTF system provides a robust and efficient method for multicolor STR analysis on microchips.
  • This technology bridges the gap between portable microchip devices and advanced STR genotyping capabilities.
  • The developed system enhances the potential for field-deployable forensic genetic analysis.