The utility of MAS5 expression summary and detection call algorithms.
BACKGROUND
Used alone, the MAS5.0 algorithm for generating expression summaries has been criticized for high False Positive rates resulting from exaggerated variance at low intensities.


RESULTS
Here we show, with replicated cell line data, that, when used alongside detection calls, MAS5 can be both selective and sensitive. A set of differentially expressed transcripts were identified that were found to be changing by MAS5, but unchanging by RMA and GCRMA. Subsequent analysis by real time PCR confirmed these changes. In addition, with the Latin square datasets often used to assess expression summary algorithms, filtered MAS5.0 was found to have performance approaching that of its peers.


CONCLUSIONS
When used alongside detection calls, MAS5 is a sensitive and selective algorithm for identifying differentially expressed genes.
Cancer Research UK, Paterson Institute for Cancer Research, The University of Manchester, Christie Hospital Site, Withington, Manchester, UK. spepper@picr.man.ac.uk <spepper@picr.man.ac.uk>
Stuart D
SD
Pepper
Emma K
EK
Saunders
Laura E
LE
Edwards
Claire L
CL
Wilson
Crispin J
CJ
Miller
D000465:Algorithms; D020869:Gene Expression Profiling / Q000379:methods*; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D012986:Software Validation