PLN tissue- and age-specific changes in gene expression during disease induction and progression in NOD mice.

ABSTRACT: 41K whole genome oligo-microarrays (Agilent Technologies) were used to characterize age-dependent changes in gene expression in pancreatic lymph nodes (PLN) obtained from up to 7 individual NOD mice at 6 different time points (10 days (n=7), and 4 weeks (n=6), 8 weeks (n=4), 12 weeks (n=7), 16 weeks (n=6), and 20 weeks of age (n=5)), compared to NOD.B10 tissue controls. "Milestone Genes" are genes whose expression was significantly changed (approximately 3 fold) as the result of splicing or changes in transcript level. Milestone Genes were identified among genes within type one diabetes (T1D) susceptibility regions (Idd). Milestone Genes showing uniform patterns of changes in expression at various time points were identified. Potential T1D candidate genes were identified among Milestone Genes within Idd regions and/or hierarchical clusters. These studies identified tissue- and age-specific changes in gene expression that may play an important role in the inductive or destructive events of T1D. NOD/LtJ (NOD), NOD.B10Sn-H2b/J (NOD.B10) female mice of multiple ages were used for this study. Six Groups of NOD mice were sacrificed at 10 days, and 4, 8, 12, 16, and 20 weeks of age and pancreatic lymph nodes (PLN) were removed and prepared for mRNA analysis. Two Groups of 10 NOD.B10 mice [10 days (n=10) + 20 weeks of age (n=10)] were used as a tissue specific control. Gene (mRNA) expression was analyzed using the 41K Whole Mouse Genome Oligo Microarray Kit (Agilent Technologies), and gene expression data are processed (cy3: NOD, cy5: NOD.B10) and reported as normalized expression ratios: Log 10 (NOD processed signal / NOD.B10 processed signal) (Log ratio). 10days of age; PLN_10d (n=7), 4 weeks of age; PLN_4w (n=6), 8 weeks of age; PLN_8w (n=4), 12 weeks of age; PLN_12w (n=7), 16 weeks of age; PLN_16w (n=6), 20 weeks of age; PLN_20w (n=5)

ORGANISM(S): Mus musculus

SUBMITTER: Keiichi Kodama 

PROVIDER: E-GEOD-15150 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress