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Microarray Scanner Performance Over a Five-Week Period as Measured With Cy5 and Cy3 Serial Dilution Slides
Mary B Satterfield1, Katrice Lippa1, Z Q Lu1
1National Institute of Standards and Technology, Gaithersburg, MD 20899.
Summary
Cyanine 5 (Cy5) dye degraded quickly during scanner performance tests, while cyanine 3 (Cy3) remained stable. This finding is crucial for developing reliable microarray scanner qualification methods.
Area of Science:
- Biophotonics
- Analytical Chemistry
- Microarray Technology
Background:
- Scanner performance is critical for reliable microarray data.
- Developing robust instrument qualification methods is essential for consistent results.
- Dye stability and scanner drift can impact assay performance over time.
Purpose of the Study:
- To evaluate scanner performance using dye slides with serial dilutions.
- To investigate the impact of various factors on scanner performance over a five-week period.
- To guide the development of a microarray scanner qualification method.
Main Methods:
- Scanning of slides with serial dilutions of cyanine 5 (Cy5) and cyanine 3 (Cy3) dyes.
- Time series analysis of dye signal intensity, signal-to-noise ratio (S/N), signal background, slope, and limit of detection (LOD).
- Tracking scanner drift using Standard Reference Material (SRM) 2242.
Main Results:
- The greatest impact on performance metrics was the dye type.
- Cyanine 5 (Cy5) dye exhibited degradation within one week, irrespective of other tested factors.
- Cyanine 3 (Cy3) dye demonstrated relative stability throughout the study period.
Conclusions:
- Time series charts of dye performance metrics show promise for developing microarray scanner qualification.
- Dye stability is a critical factor influencing scanner performance and qualification.
- This study provides foundational data for establishing preliminary dye slide-based scanner testing methods.
