Pressure Overload-Induced Ventricular Crosstalk Activates Regenerative Mechanisms in the Contralateral Ventricle in Neonatal Mice [RNA-Seq]

Driven by clinical evidence of funcional recovery of the left ventricle (LV) in children with left ventricular dilated cardiomyopathy upon increased right ventricular (RV) pressure by pulmonary aretry banding (PAB) and considering the regenerative capacity of the neonatal mammalian heart, we have explored whether pressure overload in one ventricle could trigger regenerative mechanisms in the other ventricle. Using RNAseq, we identified 636 genes, that were upregulated following nPAB in both the LV and the RV compared to Sham controls. 1052 genes were upregulated in the RV alone, 191 in the LV alone.

GO terms assicoated with genes that were upregulated in both ventricles include positive regulation of cell proliferation and angiogenesis. The here uploaded sequancing data supports echocardiographic and immunohistological evidence of an adaptive regulation of both the LV and the RV to an increased RV pressure.