Remote limb ischaemic conditioning produces cardioprotection in rats with testicular ischaemia-reperfusion injury.
Zhibing YanLei DuQuanhua LiuLeng ZhouZhaoyang HuPublished in: Experimental physiology (2021)
Remote ischaemic conditioning can protect hearts against arrhythmia. Testicular ischaemia-reperfusion (TI/R) injury is associated with electrocardiographic abnormalities. We investigated the effect of remote limb ischaemia preconditioning (RIPre) and postconditioning (RIPost) on arrhythmogenesis in TI/R rats, and determined the potential role of c-Jun N-terminal kinase (JNK)/connexin 43 (Cx43) signalling. Rats were randomized to sham-operated, control, TI/R, RIPre and RIPost groups. TI/R rats were more predisposed to myocardial reperfusion-induced atrioventricular block (AVB). RIPre and RIPost reduced the incidence of sudden cardiac death (SCD) or AVB, and duration of ventricular tachyarrhythmias during myocardial reperfusion. RIPre and RIPost decreased myocardial I/R-induced phosphorylation level of JNK, while preserving myocardial Cx43 expression in TI/R rats. Taken together, TI/R rats were predisposed to myocardial reperfusion-induced AVB. RIPre and RIPost protected TI/R hearts against ischaemia-provoked ventricular arrhythmia and ultimately reduced the incidence of SCD by suppressing JNK activation and restoring Cx43 expression.
Keyphrases
- left ventricular
- cerebral ischemia
- acute myocardial infarction
- acute ischemic stroke
- high glucose
- signaling pathway
- heart failure
- poor prognosis
- cell death
- diabetic rats
- risk factors
- subarachnoid hemorrhage
- double blind
- clinical trial
- open label
- risk assessment
- brain injury
- drug induced
- ischemia reperfusion injury
- mitral valve
- tyrosine kinase
- human health