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Microarrays: How Many Do You Need?




We estimate the number of microarrays that is required in order to gain reliable results from a common type of study: the pairwise comparison of different classes of samples. We show that current knowledge allows for the construction of models that look realistic with respect to searches for individual differentially expressed genes and derive prototypical parameters from real data sets. Such models allow investigation of the dependence of the required number of samples on the relevant parameters: the biological variability of the samples within each class, the fold changes in expression that are desired to be detected, the detection sensitivity of the microarrays, and the acceptable error rates of the results. We supply experimentalists with general conclusions as well as a freely accessible Java applet at www.scai.fhg.de/special/bio/howmanyarrays/ for fine tuning simulations to their particular settings.

Author(s): Zien, A. and Fluck, J. and Zimmer, R. and Lengauer, T.
Journal: Journal of Computational Biology
Volume: 10
Number (issue): 3-4
Pages: 653-667
Year: 2003
Day: 0

Department(s): Empirical Inference
Bibtex Type: Article (article)

Digital: 0
Institution: Fraunhofer Institute SCAI
Language: en
Organization: Max-Planck-Gesellschaft
School: Biologische Kybernetik

Links: Web


  title = {Microarrays: How Many Do You Need?},
  author = {Zien, A. and Fluck, J. and Zimmer, R. and Lengauer, T.},
  journal = {Journal of Computational Biology},
  volume = {10},
  number = {3-4},
  pages = {653-667},
  organization = {Max-Planck-Gesellschaft},
  institution = {Fraunhofer Institute SCAI},
  school = {Biologische Kybernetik},
  year = {2003}