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Gene expression strain surveys
A collection of 10+ expression microarray data sets (strain surveys) as well as functionality such as correlations with phenotypes and strain outlier analyses. See also MGI's GXD database which has expression data and images from many other types of study designs. MPD requirements for gene expression data: strain survey of 15 or more strains; sexes segregated; 3+ biological replicates preferred. Treatment-control and other multi-cohort studies are accessioned as multiple data sets and can be analyzed using the differential analysis tool below. [Usage caveats]
• Data sets       • Strain coverage       • Annotation notes

Starting with a particular gene or genomic region....
Click here to find your gene symbol or location, then on the following detail page find the Gene Expression section. From there you can list probesets in the vicinity or:
    • List phenotype measurements mathematically correlated to probesets in vicinity
    • List strain outliers for probesets in vicinity

Starting with certain MPD phenotype measurements list genes or locations with expression probesets correlated to your phenotypes. Navigate to phenotype data of interest. and click on Apply Tools. Select a few measurements then choose the "Correlations" mining tool.

Find expression vs. phenotype correlations on the fly ... click here
This will compute all pairwise correlations between selected inputs and produce a CSV file. Analysis denominators are shown at the top of the result.

Starting with one or two strains of interest.... click here
List locations where one or two selected strains are expression outliers relative to other strains tested. Entire genome or a specific region. One, several, or all data sets.

Starting with two strains (or strain sets)... click here
List the genes / probesets where there's the most expression difference found between two selected strain sets, in one expression data set.

Differential expression analysis... click here.   Studies are available comparing treatments vs. controls (high-fat diet, LPS, TCE, OxPAPC), or females vs. males, or comparison of cell types.

Phenotype strain survey data tagged to specific genes or proteins ... Click here

Other approaches
    • Correlate to your own strain means   Type in your unpublished strain means and find expression data (probesets and genes) that are mathematically correlated.

    • Download file of all computed correlations: All computed correlations between probesets and MPD phenotype measurements with correlation p value ≥ 0.005   This file is available by request (

    • Downloading expression data sets: Most expression data in MPD are available via public resources such as GEO. However, if a particular type of download file is needed let us know, we may be able to help.

• Video tutorial sessions 7 and 14 include demonstrations of MPD's gene expression functionality.


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