Linked Life Data

15054023

Source:http://linkedlifedata.com/resource/pubmed/id/15054023

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2004-3-31
pubmed:abstractText
Mixture modeling provides an effective approach to the differential expression problem in microarray data analysis. Methods based on fully parametric mixture models are available, but lack of fit in some examples indicates that more flexible models may be beneficial. Existing, more flexible, mixture models work at the level of one-dimensional gene-specific summary statistics, and so when there are relatively few measurements per gene these methods may not provide sensitive detectors of differential expression. We propose a hierarchical mixture model to provide methodology that is both sensitive in detecting differential expression and sufficiently flexible to account for the complex variability of normalized microarray data. EM-based algorithms are used to fit both parametric and semiparametric versions of the model. We restrict attention to the two-sample comparison problem; an experiment involving Affymetrix microarrays and yeast translation provides the motivating case study. Gene-specific posterior probabilities of differential expression form the basis of statistical inference; they define short gene lists and false discovery rates. Compared to several competing methodologies, the proposed methodology exhibits good operating characteristics in a simulation study, on the analysis of spike-in data, and in a cross-validation calculation.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1465-4644
pubmed:author
pubmed:issnType
Print
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
155-76
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:15054023-Algorithms, pubmed-meshheading:15054023-Cell Cycle Proteins, pubmed-meshheading:15054023-Computer Simulation, pubmed-meshheading:15054023-DEAD-box RNA Helicases, pubmed-meshheading:15054023-Data Interpretation, Statistical, pubmed-meshheading:15054023-Fungal Proteins, pubmed-meshheading:15054023-Gene Expression Profiling, pubmed-meshheading:15054023-Gene Expression Regulation, Fungal, pubmed-meshheading:15054023-Models, Genetic, pubmed-meshheading:15054023-Models, Statistical, pubmed-meshheading:15054023-Mutation, pubmed-meshheading:15054023-Oligonucleotide Array Sequence Analysis, pubmed-meshheading:15054023-Protein Biosynthesis, pubmed-meshheading:15054023-RNA, Fungal, pubmed-meshheading:15054023-RNA Helicases, pubmed-meshheading:15054023-Saccharomyces cerevisiae, pubmed-meshheading:15054023-Saccharomyces cerevisiae Proteins
pubmed:year
2004
pubmed:articleTitle
Detecting differential gene expression with a semiparametric hierarchical mixture method.
pubmed:affiliation
Department of Statistics, University of Wisconsin-Madison, 1210 West Dayton St, Madison, WI 53706-1685, USA. newton@stat.wisc.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.