Technical Variability in Microarray Experiments
Author Information
Author(s): Bryant Penelope A., Smyth Gordon K., Robins-Browne Roy, Curtis Nigel
Primary Institution: The University of Melbourne
Hypothesis
What is the magnitude of biological and technical variability in gene expression relative to stimulation effects?
Conclusion
The study found that stimulation with LPS has a much greater effect on gene expression than the variability from technical and biological sources.
Supporting Evidence
- Technical variability was found to be greater than biological variability.
- Gene expression changes due to LPS stimulation were significantly larger than variability.
- The study provides confidence in using microarray studies for detecting gene expression changes.
Takeaway
Scientists looked at how much the results of a gene study can change because of mistakes in the experiment versus real changes caused by a substance. They found that the real changes were much bigger than the mistakes.
Methodology
The study involved stimulating human PBMC with LPS and measuring gene expression changes using microarrays, with replication at multiple levels.
Limitations
The study may have artefactual variability due to the composition of the common reference RNA used for hybridization.
Participant Demographics
Five adult volunteers (two female and three male, age range 21–34 years).
Digital Object Identifier (DOI)
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