Nanoparticle-Encapsulated Curcumin Inhibits Diabetic Neuropathic Pain Involving the P2Y12 Receptor in the Dorsal Root Ganglia.

Nanoparticle-Encapsulated Curcumin Inhibits Diabetic Neuropathic Pain Involving the P2Y12 Receptor in the Dorsal Root Ganglia.
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纳米颗粒封装的姜黄素抑制涉及背根神经节 P2Y12 受体的糖尿病神经性疼痛

DOI:
10.3389/fnins.2017.00755
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发表时间:
2017
影响因子:
4.3
通讯作者:
Li G
Li G
中科院分区:
医学2区
文献类型:
--
作者:
Jia T;Rao J;Zou L;Zhao S;Yi Z;Wu B;Li L;Yuan H;Shi L;Zhang C;Gao Y;Liu S;Xu H;Liu H;Liang S;Li G

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糖尿病周围神经病变导致糖尿病神经性疼痛(DNP)。卫星胶质细胞 (SGC) 包裹背根神经节 (DRG) 中的神经元胞体。嘌呤能 2 (P2) Y12 受体在 DRG 中的 SGC 上表达。 SGC 激活在 DNP 的发病机制中发挥着重要作用。姜黄素具有抗炎和抗氧化特性。由于姜黄素在体内代谢稳定性差、生物利用度低,因此采用纳米颗粒包裹姜黄素来提高其靶向性和生物利用度。在本研究中,我们的目的是研究纳米颗粒封装的姜黄素对 P2Y12 受体介导的 DNP 对大鼠 DRG 中 SGC 的影响。糖尿病周围神经病变增加了糖尿病 (DM) 大鼠 DRG 中 SGC 上 P2Y12 受体的表达水平,并增强了机械和热痛觉过敏。 DRG 中 SGC 中 P2Y12 受体的上调增加了促炎细胞因子的产生。白介素 1β (IL-1β) 和连接蛋白 43 (Cx43) 的上调导致 DM 大鼠出现机械和热痛觉过敏。纳米颗粒封装的姜黄素降低了 DM 大鼠 DRG 中 IL-1β 和 Cx43 表达的上调,并降低了磷酸化 Akt (p-Akt) 的水平。 SGC上P2Y12的上调以及DRG中IL-1β和Cx43的上调表明DRG中SGC的激活。纳米姜黄素治疗抑制了 SGC 的活化,并具有抗炎作用,从而降低了 DRG 神经元中上调的 CGRP 表达。因此,纳米颗粒封装的姜黄素治疗降低了 DRG 中 SGC 上 P2Y12 受体的上调,并降低了 DM 大鼠的机械和热痛觉过敏。
Diabetic peripheral neuropathy results in diabetic neuropathic pain (DNP). Satellite glial cells (SGCs) enwrap the neuronal soma in the dorsal root ganglia (DRG). The purinergic 2 (P2) Y12 receptor is expressed on SGCs in the DRG. SGC activation plays an important role in the pathogenesis of DNP. Curcumin has anti-inflammatory and antioxidant properties. Because curcumin has poor metabolic stability in vivo and low bioavailability, nanoparticle-encapsulated curcumin was used to improve its targeting and bioavailability. In the present study, our aim was to investigate the effects of nanoparticle-encapsulated curcumin on DNP mediated by the P2Y12 receptor on SGCs in the rat DRG. Diabetic peripheral neuropathy increased the expression levels of the P2Y12 receptor on SGCs in the DRG and enhanced mechanical and thermal hyperalgesia in rats with diabetes mellitus (DM). Up-regulation of the P2Y12 receptor in SGCs in the DRG increased the production of pro-inflammatory cytokines. Up-regulation of interleukin-1β (IL-1β) and connexin43 (Cx43) resulted in mechanical and thermal hyperalgesia in rats with DM. The nanoparticle-encapsulated curcumin decreased up-regulated IL-1β and Cx43 expression and reduced levels of phosphorylated-Akt (p-Akt) in the DRG of rats with DM. The up-regulation of P2Y12 on SGCs and the up-regulation of the IL-1β and Cx43 in the DRG indicated the activation of SGCs in the DRG. The nano-curcumin treatment inhibited the activation of SGCs accompanied by its anti-inflammatory effect to decrease the up-regulated CGRP expression in the DRG neurons. Therefore, the nanoparticle-encapsulated curcumin treatment decreased the up-regulation of the P2Y12 receptor on SGCs in the DRG and decreased mechanical and thermal hyperalgesia in rats with DM.
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