Journal: European Heart Journal
Article Title: Left bundle branch vs biventricular pacing: mechanistic insights from a canine model
doi: 10.1093/eurheartj/ehaf1093
Figure Lengend Snippet: Overview of the key findings. This study compares the treatment efficacy of LBBP and BiVP, and relating electrocardiographic, echocardiographic and cellular (reverse) remodeling in a canine DHF model. The results show that LBBP restores electrical synchrony (QRSd) to a similar extent as BiVP, while leads to larger LV-GLS improvement than BiVP. Both LBBP and BiVP reverse the protein level of KCNIP2, SERCA2a and Cx43. Moreover, LBBP reverses abnormalities in cytoskeleton-associated proteins, TGF-β signaling, and SERCA2a expression more than BiVP, as well as enhances myocardial energy metabolism via more efficient TCA cycling and ATP production. ANKRD1, ankyrin repeat domain 1; ATP, adenosine triphosphate; BiVP, biventricular pacing; BNP, B-type natriuretic peptide; Cx43, connexin 43; DHF dyssynchronous heart failure; ECG, electrocardiogram; echo, echocardiogram; GLUD1, glutamate dehydrogenase 1; GSNOR S-nitrosoglutathione reductase; KCNIP2, potassium voltage-gated channel interacting protein 2; LBBP, left bundle branch pacing; LV-GLS, left ventricular global longitudinal strain; NC, normal control; SERCA2a, sarcoplasmic/endoplasmic reticulum Ca 2+ ATPase 2a; TCA, tricarboxylic acid; TGF-β, Transforming growth factor-β.
Article Snippet: The levels of several key proteins were examined using western blot, including ANKRD1 (Proteintech, 11427-1-AP), BNP (Abclonal, A23996), Cx43 (Proteintech, 26980-1-AP), GSNOR (Proteintech, 66193-1-Ig), GLUD1 (Proteintech, 14299-1-AP), KCNIP2 (Abclonal, A7100), SERCA2a (Abclonal, A0098), TGF-β (Proteintech, 81746-2-RR), and GAPDH (Proteintech, 10494-1-AP).
Techniques: Expressing, Control