Related Experiment Videos
Use of a mixed tissue RNA design for performance assessments on multiple microarray formats
Karol L Thompson1, Barry A Rosenzweig, P Scott Pine
1Center for Drug Evaluation and Research, US FDA, Silver Spring, MD 20993, USA. karol.thompson@fda.hhs.gov
Nucleic Acids Research
|December 27, 2005
Summary
Standardized biological reagents improve microarray data reliability. This study developed a complex reagent for assessing accuracy and reproducibility across different microarray platforms, establishing a benchmark for performance evaluation.
Area of Science:
- Molecular Biology
- Genomics
- Bioinformatics
Background:
- Microarray technology is crucial for gene expression analysis.
- Lack of standardized reagents hinders data comparability and reliability across platforms.
- Existing methods lack consistent performance metrics for accuracy and reproducibility.
Purpose of the Study:
- To design and validate a complex biological reagent for assessing microarray performance.
- To establish a common standard for accuracy, reproducibility, and dynamic range evaluation.
- To benchmark performance across different commercial oligonucleotide array formats.
Main Methods:
- Developed a two-mixture RNA reagent with varying proportions from four rat tissues.
- Utilized over 200 reference probes selected for tissue-selectivity and dynamic range.
- Tested the reagent across three commercial array formats in eight independent laboratories.
Main Results:
- Achieved close agreement between experimental and target gene expression ratios.
- Demonstrated low variance in data across platforms, replicates, and testing sites.
- Validated the reagent's effectiveness in assessing laboratory and data processing performance.
Conclusions:
- The developed reagent serves as a reliable benchmark for microarray performance standards.
- This approach enhances data comparability and reliability in gene expression studies.
- The mixed-tissue reagent design can be adapted for other species and applications.