E-MEXP-1942 - Transcription profiling of mouse lung from C57BL6 and DBA2 parental strains and D2.B6-Chr7 and D2.B6-Chr19 congenic mice following aerosol infection with Mycobacterium tuberculosis for 30 and 70 days
Released on 20 February 2009, last updated on 16 October 2015
To gain insight into the host cell types, cellular and molecular pathways possibly involved in the differential permissiveness to pulmonary replication of M. tuberculosis, we carried out transcript profiling studies on M. tuberculosis-infected lungs from congenic and parental strains. We were particularly interested in two groups of transcripts. The first group consists of transcripts which expression in the lung is regulated in response to M. tuberculosis infection (global response to infection), and that is obtained by comparing transcripts profiles of infected vs. uninfected lungs. The second group of transcripts is associated with increased resistance to M. tuberculosis infection of B6 and D2.B6-Chr7 mice. That list consists in the overlap between the lists commonly expressed in response to infection between resistant B6 and D2.B6-Chr7 but that show a significant difference in modulation when compared to infected susceptible D2.
In these experiments, B6, D2 as well as the D2.B6-Chr19, and D2.B6-Chr7 congenic lines were infected with M. tuberculosis and lungs were harvested at day 30 and day 70, and RNA was prepared. Three independent RNA samples from each group were converted to labeled cDNAs and hybridized to Affymetrix oligonucleotides arrays (Mouse Genome 430 2.0 array). Hybridization results were analyzed with the Genesifter analysis program to characterize changes in gene expression.
transcription profiling by array, co-expression, disease state, in vivo, strain or line, time series
Genetic and Functional Characterization of the Mouse Trl3 Locus in Defense against Tuberculosis. Marquis, Jean-Francois; LaCourse, Ronald; Ryan, Lynn; North, Robert J.; Gros, Philippe.