畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (12): 5312-5317.doi: 10.11843/j.issn.0366-6964.2023.12.039

• 研究简报 • 上一篇    下一篇

1-甲基海因对慢性疼痛大鼠钠离子通道蛋白Nav1.8的干预作用

梁雾滢1,2,3, 刘镇1,2,3, 曾玉淇1,2,3, 吕俊瑾1,2,3, 莫睿文1,2,3, 远立国1,2,3*   

  1. 1. 华南农业大学兽医学院, 广州 510642;
    2. 广东省兽医临床重大疾病综合防控重点实验室, 广州 510642;
    3. 广东省宠物工程技术研究中心, 广州 510642
  • 收稿日期:2023-05-09 出版日期:2023-12-23 发布日期:2023-12-26
  • 通讯作者: 远立国,主要从事兽医外科研究,E-mail:yuanliguo@scau.edu.cn
  • 作者简介:梁雾滢(1998-),女,广东佛山人,硕士生,主要从事兽医外科研究,Email:liangwuying@stu.scau.edu.cn;刘镇(1993-),江西南昌人,硕士,主要从事兽医外科研究,E-mail:altmanliu@stu.scau.edu.cn。
  • 基金资助:
    广东省自然科学基金(2013B040200032)

Effect of 1-methylhydantoin on Sodium Channel Nav1.8 in Rats with Chronic Pain

LIANG Wuying1,2,3, LIU Zhen1,2,3, ZENG Yuqi1,2,3, Lü Junjin1,2,3, MO Ruiwen1,2,3, YUAN Liguo1,2,3*   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou 510642, China;
    3. Guangdong Technological Engineering Research Center for Pets, Guangzhou 510642, China
  • Received:2023-05-09 Online:2023-12-23 Published:2023-12-26

摘要: 旨在研究1-甲基海因(1-methylhydantoin, MH)对钠离子通道(Nav channels, Navs)1.8的干预作用,为临床科学治疗疼痛提供理论依据,为实现"疼痛最小化"终极目标拓宽途径。选取60只SPF级SD大鼠通过随机分组设计,各组分别使用1-甲基海因(MH组)、利多卡因(L组)、氨溴索(A组)处理,第21和28天使用蛋白免疫印记法检测大鼠L4~L6段背根神经节(dorsal root ganglia, DRG)Nav1.8的蛋白表达,采用全细胞膜片钳技术检测MH作用下的Nav1.8通道峰电流。结果表明,与M组相比,MH能使Nav1.8表达显著下降(P<0.05)。MH对Nav1.8通道峰电流具有一定抑制作用,10和100 μmol·L -1 MH对Nav1.8的电流抑制率分别为6.34%±3.13%和14.6%±1.52%,具有量效关系。提示MH能够下调慢性疼痛大鼠DRG中Nav1.8的表达,同时抑制Nav1.8电流,进而产生镇痛作用。

关键词: 1-甲基海因, 大鼠, 慢性疼痛, Nav1.8, 膜片钳技术

Abstract: The purpose of this study is to investigate the effect of 1-methylhydantoin on Nav Channels 1.8, which can provide a theoretical basis for pain intervened and different ways to achieve the ultimate goal of "pain minimization". Sixty SPF SD rats were randomly divided into six groups.The group was treated with 1-methylhyne (group MH), lidocaine (group L) and ambroxol (group A), respectively. On the 21st and 28th day after modeling, Western blot was used to detect the protein expressions of Nav1.8 in the L4-L6 dorsal root ganglia of rats, and patch-clamp technique was used to detect the peak currents of Nav1.8 channels under the effect of MH. Comparing with the group of model,the results showed that MH could decrease the expression of Nav1.8 significantly (P<0.05). MH inhibited the channel peak currents of Nav1.8 to a certain extent. The current inhibition rates of 10 μmol·L-1 and 100 μmol·L-1 MH to Nav1.8 were 6.34%±3.13% and 14.6%±1.52% respectively, which is showing a dose-response relationship. It is suggested that MH can decrease the expression of Nav1.8 in DRG of rats with chronic pain, and inhibit Nav1.8 current at the same time, thus producing analgesic.

Key words: 1-methylhydantoin, rat, chronic pain, Nav1.8, patch-clamp technique

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