LAUSR

Prenatal testosterone (T)-treated female sheep manifest peripheral insulin resistance, ectopic lipid accumulation and insulin signaling disruption in liver and muscle. This study investigated transcriptional changes and transcriptome signature of prenatal T excess-induced hepatic and muscle-specific metabolic disruptions. Genome-wide coding and non-coding (nc) RNA expression in liver and muscle from 21-month-old prenatal T-treated (T propionate 100mg intramuscular twice weekly from days 30 to 90 of gestation; Term: 147 days) and control females were compared. Prenatal T (1) induced differential expression of mRNAs in liver (15 down, 17 up) and muscle (66 down, 176 up) (FDR<0.05, absolute log2 fold change>0.5); (2) downregulated mitochondrial pathway genes in liver and muscle; (3) downregulated hepatic lipid catabolism and PPAR signaling gene pathways; (4) modulated ncRNA metabolic processes gene pathway in muscle and (5) downregulated 5 uncharacterized long ncRNA (lncRNA) in the muscle but no ncRNA changes in the liver. Correlation analysis showed downregulation of lncRNAs LOC114112974 and LOC105607806 was associated with decreased TPK1, and LOC114113790 with increased ZNF470 expression. Orthogonal Projections to Latent Structures Discriminant Analysis identified mRNAs HADHA and SLC25A45, and miRNAs MIR154A, MIR25 and MIR487B in liver and ARIH1 and ITCH and miRNAs MIR369, MIR10A and MIR10B in muscle as potential biomarkers of prenatal T-excess. These findings suggest downregulation of mitochondria, lipid catabolism, and PPAR signaling genes in liver and dysregulation of mitochondrial and ncRNA gene pathways in muscle are contributors of lipotoxic and insulin resistant hepatic and muscle phenotype. Gestational T excess programming of metabolic dysfunctions involve tissue-specific ncRNA modulated transcriptional changes.