Numerous genetically engineered animal models of heart failure (HF) exhibit multiple characteristics of human HF, including aberrant -adrenergic signaling. Several of these HF models can be rescued by cardiac-targeted expression of the G inhibitory carboxy-terminus of the -adrenergic receptor kinase (ARKct). We recently reported microarray analysis of gene expression in multiple animal models of HF and their ARKct rescue, where we identified gene expression patterns distinct and predictive of HF and rescue. We have further investigated the muscle LIM protein knockout model of HF (MLP^-/-), which closely parallels human dilated cardiomyopathy disease progression and aberrant -adrenergic signaling, and their ARKct rescue. A group of known and novel genes were identified and validated by quantitative real-time PCR whose expression levels predicted phenotype in both the larger HF group and in the MLP^-/- subset. One of these novel genes is herein identified as Nogo; a protein widely studied in the nervous system where it plays a role in regeneration. Nogo expression is altered in HF and normalized with rescue, in an isoform specific manner, using left ventricular tissue harvested from both animal and human subjects. To investigate cell type specific expression of Nogo in the heart, immunofluorescence and confocal microscopy were utilized. Nogo expression appears to be most clearly associated with cardiac fibroblasts. To our knowledge, this is the first report to demonstrate the relationship between Nogo expression and HF, including cell-type specificity, in both mouse and human HF and phenotypic rescue.