Preparing your results

Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

False negative rates in Drosophila cell-based RNAi screens: a case study.

BACKGROUND: High-throughput screening using RNAi is a powerful gene discovery method but is often complicated by false positive and false negative results. Whereas false positive results associated with RNAi reagents has been a matter of extensive study, the issue of false negatives has received less attention. RESULTS: We performed a meta-analysis of several genome-wide, cell-based Drosophila RNAi screens, together with a more focused RNAi screen, and conclude that the rate of false negative results is at least 8%. Further, we demonstrate how knowledge of the cell transcriptome can be used to resolve ambiguous results and how the number of false negative results can be reduced by using multiple, independently-tested RNAi reagents per gene. CONCLUSIONS: RNAi reagents that target the same gene do not always yield consistent results due to false positives and weak or ineffective reagents. False positive results can be partially minimized by filtering with transcriptome data. RNAi libraries with multiple reagents per gene also reduce false positive and false negative outcomes when inconsistent results are disambiguated carefully.

Pubmed ID: 21251254


  • Booker M
  • Samsonova AA
  • Kwon Y
  • Flockhart I
  • Mohr SE
  • Perrimon N


BMC genomics

Publication Data

February 10, 2011

Associated Grants

  • Agency: NIDDK NIH HHS, Id: R01 DK088718
  • Agency: NIGMS NIH HHS, Id: R01 GM067761
  • Agency: NHGRI NIH HHS, Id: U01 HG004271
  • Agency: Howard Hughes Medical Institute, Id:

Mesh Terms

  • Animals
  • Cluster Analysis
  • Drosophila
  • Gene Expression Profiling
  • Proteasome Endopeptidase Complex
  • RNA Interference
  • RNA, Double-Stranded
  • Ribosomes