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Learn MoreAfter induction of ischemic chronic heart failure (CHF), mice exhibited depression-like behavior, in terms of increased anhedonia, and decreased both exploratory activity and interest in novelty. On histology, ischemic CHF mice showed no alterations in overall cerebral morphology. To further evaluate relevant behavioral changes found in CHF mice, RNA-sequencing analysis of prefrontal cortex and hippocampus - the brain regions, whose structural and functional alterations are associated with an increased risk for developing major depressive disorder - and of left myocardial tissue was performed in CHF vs. sham-operated animals. RNA-sequencing revealed relevant changes in hippocampal or prefrontal cortical expression of genes responsible for axonal vesicle transport (Kif5b), signal transduction (Arc, Gabrb2), limitation of inflammation (RORA; Nr4a1) and of hypoxic brain damage (Hif3a). Besides, the actual literature describes some of the genes (RORA, Gabrb2, Npas4, and Junb) being associated with depression-like behavior. Nr4a1 significantly regulated in both brain and heart tissue after induction of ischemic CHF could be a potential link and reveals the central role of inflammation in the interrelation of the brain and the failing heart. SOURCE: Anna Frey (frey_a@ukw.de) - University Hospital of Würzburg
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