槲皮素缓解紫杉醇诱发外周神经病变小鼠模型的疼痛效应及其机制研究
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1.浙江中医药大学附属第三医院;2.浙江中医药大学

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基金项目:

国家自然科学基金(No. 82305369),浙江省自然科学基金(No. LQ21H270004)


Therapeutic effects of quercetin on the pain responses of a mouse model of paclitaxel-induced peripheral neuropathy and related mechanisms
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Affiliation:

1.The Third Affiliated Hospital of Zhejiang Chinese Medical University;2.Zhejiang Chinese Medical University

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Funded by National Natural Science Foundation of China (82305369), Zhejiang Provincial Natural Science Funds (LQ21H270004)

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    摘要:

    目的:观察槲皮素对紫杉醇诱发外周神经病变小鼠模型疼痛症状、脊髓星形胶质细胞活化以及背根神经节中痛敏感TRPV1、P2X3的干预作用。 方法:选取C57BL/6小鼠24只,随机分为空白组、模型组、模型+槲皮素组,每组8只。模型组与模型+槲皮素组分别注射累计剂量为8mg/kg的紫杉醇进行造模,空白组在相应时间点注射对应溶剂。模型+槲皮素组在造模第8天开始,每天灌胃60mg/kg的槲皮素溶液,其余两组分别给予相应体积溶剂。von Frey检测各组小鼠的机械痛痛阈,免疫荧光检测各组小鼠脊髓中星形胶质细胞的活化,免疫荧光和免疫印迹检测以及背根神经节中痛敏感TRPV1、P2X3的表达。 结果:①与模型组相比,模型+槲皮素组小鼠的机械痛痛阈显著升高,疼痛症状得到明显缓解。②与模型组相比,模型+槲皮素组小鼠脊髓星形胶质细胞的活化明显降低,背根神经节中TRPV1、P2X3的表达显著减少(p<0.05)。 结论:槲皮素能够有效缓解紫杉醇诱发外周神经病变小鼠的疼痛症状,其作用机制很可能与缓解脊髓星形胶质细胞活化以及减少背根神经节中TRPV1、P2X3表达有关。

    Abstract:

    Objective: To observe the effect of quercetin on mechanical allodynia, activation of astrocytes and upregulations of pain-related TRPV1 and P2X3 in mouse with paclitaxel-induced peripheral neuropathy. Method: 24 C57BL/6 mice were randomly divided into Control group, Model group, Model+Quercetin group, 8 mice per group. A total dosage 8 mg/kg of paclitaxel were injected intraperitoneally into mice of Model and Model+ Quercetin group to establish the model. Mice in Control group were injected intraperitoneally with the same volume of vehicle. At the 8th day after 1st injection, mice in Model+Quercetin group were injected with 60mg/kg quercetin solution orally and mice in other group were also injected with the same volume of vehicle. Mechanical pain were measured with von Frey. Immunofluorescence was used to detect the activation of astrocytes in the spinal dorsal horn and. Immunofluorescence and western blot were used to measure the expressions of TRPV1 and P2X3 in DRGs. Results: ① Compared with Model group, the mechanical pain of mice in Model+ Quercetin group were relieved. ②Compared with Model group, the activation of astrocytes and the expressions of TRPV1 and P2X3 in mice of Model+Quercetin group were alleviated (p<0.05). Conclusion: Our result indicate that quercetin can significantly reduce mechanical pain of paclitaxel-induced peripheral neuropathy. This mechanism maybe related to alleviating activation of astrocytes in spinal dorsal horn and reducing expressions of TRPV1 and P2X3 in the dorsal root ganglia.

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  • 收稿日期:2024-04-10
  • 最后修改日期:2024-09-09
  • 录用日期:2024-09-30
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