Hydrogen sulfide in paraventricular nucleus enhances sympathetic activity and cardiac sympathetic afferent reflex in chronic heart failure rats.

Hydrogen sulfide in paraventricular nucleus enhances sympathetic activity and cardiac sympathetic afferent reflex in chronic heart failure rats.
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室旁核中的硫化氢增强慢性心力衰竭大鼠的交感神经活动和心脏交感传入反射

DOI:
10.1371/journal.pone.0050102
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Zhu GQ
Zhu GQ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gan XB;Liu TY;Xiong XQ;Chen WW;Zhou YB;Zhu GQ

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脑室内输注 NaHS(一种硫化氢 (H2S) 供体)可增加平均动脉压 (MAP)。本研究旨在确定室旁核 (PVN) 中 H2S 在调节慢性心力衰竭 (CHF) 交感神经活动和心脏交感传入反射 (CSAR) 中的作用。通过结扎大鼠左冠状动脉降支诱发CHF。麻醉下记录肾交感神经活动(RSNA)和MAP。 CSAR 通过 RSNA 和 MAP 对心外膜应用辣椒素的反应进行评估。 PVN 显微注射低剂量的 H2S 供体 GYY4137(0.01 和 0.1 nmol)对 RSNA、MAP 和 CSAR 没有显着影响。高剂量的 GYY4137(1、2 和 4 nmol)可增加基线 RSNA、MAP 和心率 (HR),并增强 CSAR。 CHF 大鼠的效果比假手术大鼠更大。 PVN 中的胱硫醚-β-合酶 (CBS) 抑制剂羟胺 (HA) 对 RSNA、MAP 和 CSAR 无显着影响。 CHF 大鼠PVN 中的CBS 活性和H2S 水平降低。假手术大鼠和CHF大鼠之间PVN中CBS水平没有发现显着差异。在假手术大鼠和 CHF 大鼠中,用辣椒素刺激心脏交感神经传入可降低 PVN 中的 CBS 活性和 H2S 水平。 PVN 中的外源 H2S 会增加 RSNA、MAP 和 HR,并增强 CSAR。对 CHF 大鼠的影响比对假手术大鼠的影响更大。 PVN 中的内源性 H2S 不负责 CHF 大鼠的交感神经激活和 CSAR 增强。
Intracerebroventricular infusion of NaHS, a hydrogen sulfide (H2S) donor, increased mean arterial pressure (MAP). This study was designed to determine the roles of H2S in the paraventricular nucleus (PVN) in modulating sympathetic activity and cardiac sympathetic afferent reflex (CSAR) in chronic heart failure (CHF). CHF was induced by left descending coronary artery ligation in rats. Renal sympathetic nerve activity (RSNA) and MAP were recorded under anesthesia. CSAR was evaluated by the RSNA and MAP responses to epicardial application of capsaicin. PVN microinjection of low doses of a H2S donor, GYY4137 (0.01 and 0.1 nmol), had no significant effects on RSNA, MAP and CSAR. High doses of GYY4137 (1, 2 and 4 nmol) increased baseline RSNA, MAP and heart rate (HR), and enhanced CSAR. The effects were greater in CHF rats than sham-operated rats. A cystathionine-β-synthase (CBS) inhibitor, hydroxylamine (HA) in PVN had no significant effect on the RSNA, MAP and CSAR. CBS activity and H2S level in the PVN were decreased in CHF rats. No significant difference in CBS level in PVN was found between sham-operated rats and CHF rats. Stimulation of cardiac sympathetic afferents with capsaicin decreased CBS activity and H2S level in the PVN in both sham-operated rats and CHF rats. Exogenous H2S in PVN increases RSNA, MAP and HR, and enhances CSAR. The effects are greater in CHF rats than those in sham-operated rats. Endogenous H2S in PVN is not responsible for the sympathetic activation and enhanced CSAR in CHF rats.
DOI: 10.1161/circresaha.109.199919
发表时间: 2009-08-14
影响因子: 20.1
作者:
Calvert JW;Jha S;Gundewar S;Elrod JW;Ramachandran A;Pattillo CB;Kevil CG;Lefer DJ
通讯作者: Lefer DJ
慢性心力衰竭中压力感受器和迷走神经传入输入对心脏交感传入反射和交感活动的抑制
DOI: 10.1371/journal.pone.0025784
发表时间: 2011
期刊: PloS one
影响因子: 3.7
作者:
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影响因子: 5.3
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DOI: 10.1016/j.freeradbiomed.2009.04.014
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影响因子: 7.4
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