Acute effects of vagus nerve stimulation parameters on gastric motility assessed with magnetic resonance imaging.

Acute effects of vagus nerve stimulation parameters on gastric motility assessed with magnetic resonance imaging.
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DOI:
10.1111/nmo.13853
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发表时间:
2020-07
影响因子:
3.5
通讯作者:
Liu Z
Liu Z
中科院分区:
医学3区
文献类型:
--
作者:
Lu KH;Cao J;Phillips R;Powley TL;Liu Z

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迷走神经刺激(VNS)是一种新兴的生物电子疗法,用于调节食物摄入和控制胃动力。然而,不同 VNS 参数和极性对餐后胃动力的影响仍未完全表征。在麻醉大鼠 (N=3) 中,我们对左侧颈迷走神经施加单相电刺激,并记录复合神经动作电位 (CNAP) 作为神经反应的测量。我们评估了单相 VNS 可以选择性激活传入或传出通路的程度。在另一组大鼠(N = 13)中,我们给每只大鼠喂食钆标记的食物,并在大鼠麻醉时用口腔对比增强磁共振成像(MRI)扫描大鼠胃。我们评估了胃窦和幽门运动作为脉冲幅度(0.13、0.25、0.5、1mA)、宽度(0.13、0.25、0.5ms)、频率(5、10Hz)和 VNS 极性的函数。单相 VNS 激活传入和传出通路的选择性分别约为 67% 和 82%。主要传入 VNS 增加了广泛参数范围内的胃窦运动。随着刺激强度的增加,主要传出 VNS 诱导窦运动显着下降(R = -0.93,P < 0.05 对于 5 Hz,R = -0.85,P < 0.05 对于 10 Hz)。随着刺激强度的增加,任一极性的 VNS 都会更大程度地促进幽门运动。偏向传入通路的单相 VNS 可能比偏向传出通路的单相 VNS 更有效地促进闭塞性收缩。
Vagus nerve stimulation (VNS) is an emerging bioelectronic therapy for regulating food intake and controlling gastric motility. However, the effects of different VNS parameters and polarity on post-prandial gastric motility remain incompletely characterized. In anesthetized rats (N=3), we applied monophasic electrical stimuli to the left cervical vagus and recorded compound nerve action potential (CNAP) as a measure of nerve response. We evaluated to what extent afferent or efferent pathway could be selectively activated by monophasic VNS. In a different group of rats (N=13), we fed each rat a gadolinium-labeled meal and scanned the rat stomach with oral contrast-enhanced magnetic resonance imaging (MRI) while the rat was anesthetized. We evaluated the antral and pyloric motility as a function of pulse amplitude (0.13, 0.25, 0.5, 1mA), width (0.13, 0.25, 0.5ms), frequency (5, 10Hz), and polarity of VNS. Monophasic VNS activated afferent and efferent pathways with about 67% and 82% selectivity, respectively. Primarily afferent VNS increased antral motility across a wide range of parameters. Primarily efferent VNS induced a significant decrease in antral motility as the stimulus intensity increased (R=−0.93, P<0.05 for 5Hz, R=−0.85, P<0.05 for 10Hz). The VNS with either polarity tended to promote pyloric motility to a greater extent given increasing stimulus intensity. Monophasic VNS biased towards the afferent pathway is potentially more effective for facilitating occlusive contractions than that biased towards the efferent pathway.
DOI: 10.1046/j.1365-2982.2002.00369.x
发表时间: 2002-12-01
影响因子: 3.5
作者:
Berthoud, HR;Hennig, G;Costa, M
通讯作者: Costa, M
DOI: 10.1113/jphysiol.1980.sp013068
发表时间: 1980-01-01
影响因子: 5.5
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发表时间: 2016-04-01
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DOI: 10.1113/jphysiol.1982.sp014463
发表时间: 1982-01-01
影响因子: 5.5
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DOI: 10.1016/0165-1838(87)90140-8
发表时间: 1987-04-01
期刊: JOURNAL OF THE AUTONOMIC NERVOUS SYSTEM
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作者:
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通讯作者: ROUSSEAU, JP