Int J Med Sci 2021; 18(4):891-901. doi:10.7150/ijms.50976 This issue

Research Paper

Left Stellate Ganglion Ablation Inhibits Ventricular Arrhythmias through Macrophage Regulation in Canines with Acute Ischemic Stroke

Youcheng Wang, MD, PhD*1, Shanqing He, MD, PhD*1, Xiaoxing Xiong, MD, PhD2, Jia Liu, MD, PhD2, Baojun Xie, MD, PhD3, Yajun Yao, MD, PhD1, Junkui Yin, MD1, Liuliu Zi, MD1, Xi Wang, MD, PhD1, Yanhong Tang, MD, PhD1, Qingyan Zhao, MD, PhD1✉

1. Department of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute of Wuhan University, Hubei Key Laboratory of Cardiology, Wuhan City, Hubei Province, China
2. Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan City, Hubei Province, China
3. Department of Radiology, Renmin Hospital of Wuhan University, Wuhan City, Hubei Province, China
*Drs Wang and He are the co-first authors.

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Citation:
Wang Y, He S, Xiong X, Liu J, Xie B, Yao Y, Yin J, Zi L, Wang X, Tang Y, Zhao Q. Left Stellate Ganglion Ablation Inhibits Ventricular Arrhythmias through Macrophage Regulation in Canines with Acute Ischemic Stroke. Int J Med Sci 2021; 18(4):891-901. doi:10.7150/ijms.50976. Available from https://www.medsci.org/v18p0891.htm

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Abstract

Aims: To investigate the potential mechanism of ventricular arrhythmias (VAs) after acute ischemic stroke and explore the effects of left stellate gangling (LSG) ablation on VAs induced by stroke in canines.

Materials and Methods: Twenty canines were randomly divided into the sham-operated group (n=6), AS group (n=7) and SGA group (n=7). Cerebral ischemic model was established in the AS group and the SGA group by right acute middle cerebral artery occlusion (MCAO). LSG ablation was performed in the SGA group as soon as MCAO. After 3 days, atrial electrophysiology and neural activity were measured in vivo. The levels of norepinephrine (NE) in plasma and ventricle were detected by ELISA. The levels of monocyte chemotactic protein-1 (MCP-1), tumor necrosis factor-α (TNF-α) and NF-κB p65 in ventricle were detected by western blotting. The pro-inflammatory polarization of macrophages in ventricle was detected by immunofluorescence.

Results: Higher ventricular tachycardia (VT) inducibility and lower ventricular fibrillation threshold (VFT) were observed in the AS group compared with those in the sham-operated group, associated with higher LSG activity and NE levels, increased number of M1 macrophages and secretion of inflammatory cytokines in ventricle (all P<0.001). Compared with the AS group, the SGA group had lower VT inducibility and higher VFT, combined with lower NE levels, and reduced number of M1 macrophages and secretion of inflammatory cytokines in ventricle (all P<0.001).

Conclusion: LSG ablation could reduce VAs vulnerability after acute stroke by preventing the macrophages polarization and activation induced by sympathetic hyperactivity.

Keywords: acute stroke, ventricular arrhythmia, sympathetic nerve, macrophage, canine