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Švorc P, Grešová S, Švorc P. Heart rate variability in male rats. Physiol Rep 2023; 11:e15827. [PMID: 37735345 PMCID: PMC10514026 DOI: 10.14814/phy2.15827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
The cardiovascular system is primarily controlled by the autonomic nervous system, and any changes in sympathetic or parasympathetic activity also have an impact on myocardial activity. Heart rate variability (HRV) is a readily available metric used to assess heart rate control by the autonomic nervous system. HRV can provide information about neural (parasympathetic, sympathetic, reflex) and humoral (hormones, thermoregulation) control of myocardial activity. Because there are no relevant reference values for HRV parameters in rats in the scientific literature, all experimental results are only interpreted on the basis of changes from currently measured control or baseline HRV values, which are, however, significantly different in individual studies. Considering the significant variability of published HRV data, the present study focused primarily on comparing control or baseline HRV values under different conditions in in vivo experiments involving rats. The aim of the study was therefore to assess whether there are differences in the starting values before the experiment itself.
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Affiliation(s)
- Pavol Švorc
- Department of Physiology and Pathophysiology, Faculty of MedicineOstrava UniversityOstravaCzech Republic
| | - Soňa Grešová
- Department of Physiology, Faculty of MedicineUniversity PJ SafarikaKosiceSlovak Republic
| | - Pavol Švorc
- Department of Physiology and Pathophysiology, Faculty of MedicineOstrava UniversityOstravaCzech Republic
- Department of Physiology, Faculty of MedicineUniversity PJ SafarikaKosiceSlovak Republic
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Yu J, Zhang RF, Mao YL. Cerebellar fastigial nucleus electrostimulation attenuates inflammation in a Post-Infarction rat model by activating cholinergic anti-inflammatory pathways. Neurosci Lett 2022; 788:136860. [PMID: 36041546 DOI: 10.1016/j.neulet.2022.136860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022]
Abstract
There are negative correlations between indices of heart rate variability (HRV) and markers of inflammation. The inflammation plays an important role in myocardial damages after myocardial infarction (MI). Our previous study found that fastigial nucleus electrostimulation (FNS) improved abnormal HRV in a rat model of MI. Whether and how it can reduce inflammation and improve cardiac function after MI and the underlying mechanisms remain unknown. 66 Sprague Dawley rats were randomly divided into 4 groups as follows: i) Sham operation group (Sham); ii) Myocardial infarction group (MI); iii) FNS+MI group (FNS plus MI): left fastigial nucleus electrostimulation; iv) FNL+FNS+MI group (left fastigial nucleus lesion plus FNS plus MI). The serum expressions of acetylcholine (ACh), pro-inflammatory cytokines tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6), and anti-inflammatory cytokines IL-10 after FNS were measured using ELISA. Subsequently, the infarct size, the infiltration of inflammatory cells, the fibrotic area, and cardiac function were also evaluated. Additionally, the effects of FNS on the cholinergic anti-inflammatory pathway (CAP)-related proteins expression were determined by Western blot. We found that FNS significantly upregulated ACh and IL-10 expressions in serum, and decreased TNF-α and IL-6 levels. FNS significantly attenuated inflammatory cell infiltration and infarct size, decreased fibrosis, increased left ventricular ejection fraction (LVEF), and reduced mortality. Besides, the levels of p-STAT3/STAT3 and p-NF-κB/NF-κB significantly elevated after MI. FNS down-regulated the expression of p-STAT3/STAT3 and p-NF-κB/NF-κB. The protective effects of FNS were partially reversed by the fastigial nucleus lesion. Our data suggested that FNS can alleviate the inflammation after MI, and its cardiac neuroprotective mechanism may be achieved by increasing vagus tone, releasing ACh, and further activating the CAP via α7nAChR. The precise mechanism remains to be elucidated.
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Affiliation(s)
- Jiang Yu
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan, China; Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang 621000, Sichuan, China
| | - Run-Feng Zhang
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang 621000, Sichuan, China.
| | - Yi-Li Mao
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang 621000, Sichuan, China
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Yu Q, Wu LB, Zhang F, Wei XT, Chen PP, Wang SY, Cai MY, Shu Q, Li LY, Wu ZJ, Cai RL, Hu L. Mechanisms of Electroacupuncture Pretreatment in Alleviating Myocardial Ischemia Reperfusion Injury: Interactions between the Cerebellar Fastigial Nucleus and Lateral Hypothalamic Area. J Acupunct Meridian Stud 2021; 14:207-218. [DOI: 10.51507/j.jams.2021.14.6.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/04/2021] [Accepted: 12/10/2021] [Indexed: 11/03/2022] Open
Affiliation(s)
- Qing Yu
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
- Acupuncture and Meridian Research Institute, Anhui Academy of Chinese Medicine, Hefei, China
| | - Li-bin Wu
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Fan Zhang
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Xiao-tong Wei
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Pian-pian Chen
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Shuai-ya Wang
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Mei-yi Cai
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Qi Shu
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Liao-yuan Li
- College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei, China
| | - Zi-jian Wu
- Acupuncture and Meridian Research Institute, Anhui Academy of Chinese Medicine, Hefei, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, China
| | - Rong-lin Cai
- Acupuncture and Meridian Research Institute, Anhui Academy of Chinese Medicine, Hefei, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, China
| | - Ling Hu
- Acupuncture and Meridian Research Institute, Anhui Academy of Chinese Medicine, Hefei, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, China
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Su M, Luo Z, Yu J, Zhang R, Wang J, Huang C, Li W, Yuan W, Zhang H, Cai G, Shen S. Effects of fastigial nucleus electrostimulation on cardiac nerve regeneration, neurotransmitter release, and malignant arrhythmia inducibility in a post-infarction rat model. Eur J Neurosci 2021; 54:8006-8019. [PMID: 34755396 DOI: 10.1111/ejn.15521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 10/17/2021] [Accepted: 11/03/2021] [Indexed: 11/28/2022]
Abstract
The reduced density of cardiac autonomic nerves plays an important role in malignant arrhythmia after myocardial infarction (MI). Previous studies have shown that there is an interaction between the brain and the heart, and fastigial nucleus electrostimulation (FNS) promotes central nerve regeneration. Whether and how it can promote cardiac nerve regeneration after MI and the underlying mechanisms remain unknown. This study investigated whether FNS promotes cardiac nerve regeneration and reduces malignant arrhythmia inducibility in a post-infarction rat model. Ninety-eight Wistar rats were randomly assigned to Sham control, MI (left anterior descending coronary artery ligation without FNS), FNS (MI plus FNS), and FNL (fastigial nucleus lesion plus FNS plus MI) groups. The frequency of malignant arrhythmia was significantly lower in the FNS group than in the MI and FNL groups. The density of cardiac autonomic nerves was less in the MI group than in the Sham group, which was promoted by FNS. The nerve growth factor (NGF) mRNA expression was downregulated in the MI group compared to the Sham group, which was significantly enhanced by FNS. The expression levels of norepinephrine (NE) and acetylcholine (ACh) were higher and lower respectively in the MI and FNL groups than in the Sham group. After FNS, NE concentration was reduced and Ach level was elevated compared to the MI group. These data suggested that FNS promoted the regeneration of cardiac autonomic nerves and reduced the incidence of malignant arrhythmias in MI rat model. The mechanisms might involve up-regulation of NGF mRNA expression, decrease of NE release and increase of ACh release.
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Affiliation(s)
- Mouxiao Su
- Department of Neurology, Mianyang Central Hospital, Mianyang, China
| | - Zhi Luo
- Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jiang Yu
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Runfeng Zhang
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang, China
| | - Jisheng Wang
- Department of Clinical Pharmacy, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang, China
| | - Changquan Huang
- Department of Geriatrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wensong Li
- Department of Cardiology, Sichuan Mianyang 404 Hospital, Mianyang, China
| | - Wei Yuan
- Department of Cardiology, Sichuan Mianyang 404 Hospital, Mianyang, China
| | - Heng Zhang
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang, China
| | - Guocai Cai
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang, China
| | - Songlin Shen
- Department of Cardiology, The Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang, China
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Soeki T, Niki T, Uematsu E, Bando S, Matsuura T, Kusunose K, Ise T, Ueda Y, Tomita N, Yamaguchi K, Koshiba K, Yagi S, Fukuda D, Taketani Y, Iwase T, Yamada H, Wakatsuki T, Akaike M, Shimabukuro M, Kishimoto I, Kangawa K, Sata M. Ghrelin protects the heart against ischemia-induced arrhythmias by preserving connexin-43 protein. Heart Vessels 2013; 28:795-801. [DOI: 10.1007/s00380-013-0333-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 02/15/2013] [Indexed: 12/01/2022]
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