Effect of Sacubitril-Valsartan on Transcriptomic Changes in Lung Tissue of Spontaneously Hypertensive Rats: A...

Hypertension, a prevalent cardiovascular disorder, exerts detrimental effects on the respiratory system. However, the underlying mechanisms remain incompletely elucidated.

We conducted comparative transcriptomic profiling via RNA sequencing (RNA-seq) of lung tissues from spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto (WKY) controls. Additionally, we assessed the effects of angiotensin receptor blocker (ARB) and angiotensin receptor-neprilysin inhibitor (ARNI) interventions on mRNA and protein expression profiles in SHR pulmonary tissue using integrated omics approaches.

Core differentially expressed genes (DEGs) identified in SHR versus WKY comparisons included Nuf2 and Cenpa, with significant enrichment in the PI3K/AKT signaling pathway. In SHR versus ARB-treated cohorts, hub genes Ccnb2 and Mad2l1 demonstrated primary pathway enrichment in cell-cycle regulation and human T-cell leukemia virus 1 infection. ARNI intervention yielded distinct hub genes (Gzma, Icam1) enriched in PI3K/AKT signaling and extracellular matrix (ECM)-receptor interactions. Proteomic analysis confirmed concordant expression patterns for EGFR and JUN proteins with transcriptomic findings.

ARB and ARNI therapies mitigate hypertension-induced pulmonary damage through divergent molecular mechanisms, with PI3K/AKT signaling and ECM-receptor interactions serving as central regulatory hubs in this protective process.