Auricular vagus nerve stimulation enhances central serotonergic function and inhibits diabetic neuropathy development in Zucker fatty rats.

Auricular vagus nerve stimulation enhances central serotonergic function and inhibits diabetic neuropathy development in Zucker fatty rats.
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耳迷走神经刺激可增强 Zucker 脂肪大鼠的中枢血清素能功能并抑制糖尿病神经病变的发展。

DOI:
10.1177/1744806918787368
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发表时间:
2018-01
期刊:
影响因子:
3.3
通讯作者:
Wang S
Wang S
中科院分区:
医学3区
文献类型:
--
作者:
Li S;Sun C;Rong P;Zhai X;Zhang J;Baker M;Wang S

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疼痛性神经病变是糖尿病的常见合并症。 Zucker 糖尿病脂肪 (fa/fa) 大鼠随着年龄的增长自发发展为 2 型糖尿病,并在 13 周龄时表现出伤害性超敏反应。在临床前和临床研究中,糖尿病神经病变的治疗具有挑战性,但经皮耳迷走神经刺激(taVNS)等补充药物似乎有利于缓解神经性疼痛。然而,taVNS 有效性背后的机制仍不清楚。在这项研究中,我们通过热痛觉过敏和后爪机械异常性疼痛检测发现,连续 27 天每天 30 分钟的 taVNS(2/15Hz,2mA)可有效抑制 Zucker 糖尿病脂肪大鼠伤害性超敏反应的发展。我们还证明,这种对伤害感受行为的有益作用与血清素 (5-HT) 血浆浓度升高和下丘脑 1A 型 5-HT 受体 (5-HT1AR) 表达上调有关。我们得出的结论是,每天 30 分钟的 taVNS 疗程可以通过增强遗传性糖尿病易感人群的血清素能功能来减少糖尿病神经病变的发展。 观点 本文提出 taVNS 作为一种抑制遗传易感人群糖尿病神经病变发展的新方法。这种方法可能会帮助临床医生避免糖尿病患者出现神经性疼痛并发症,或者在出现疼痛时减轻疼痛。
Painful neuropathy is a frequent comorbidity in diabetes. Zucker diabetic fatty (fa/fa) rats develop type 2 diabetes spontaneously with aging and show nociceptive hypersensitivity at the age of 13 weeks. In preclinical and clinical studies, the treatment of diabetic neuropathy is challenging, but complementary medicine such as transcutaneous auricular vagus nerve stimulation (taVNS) appears beneficial to the relief of neuropathic pain. However, the mechanism behind the effectiveness of taVNS remains unclear. In this study, we show that daily 30-min taVNS (2/15 Hz, 2 mA) for consecutive 27 days effectively inhibited the development of nociceptive hypersensitivity in Zucker diabetic fatty rats as detected by thermal hyperalgesia and mechanical allodynia in hindpaw. We also demonstrated that this beneficial effect in nociceptive behavior is related to an elevated serotonin (5-HT) plasma concentration and an upregulated expression of 5-HT receptor type 1A (5-HT1AR) in hypothalamus. We conclude that daily 30-min taVNS sessions lessen diabetic neuropathy development by enhancing serotonergic function in genetically diabetes prone individuals. Perspective This article presents taVNS as a new approach to inhibit the development of diabetic neuropathy in genetically prone individuals. This approach could potentially help clinicians who seek to avoid the complication of neuropathic pain in diabetic patient or to relieve the pain if there was one.
DOI: 10.1016/j.brs.2014.11.018
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