Antioxidants (Basel) :薄荷通过抑制ERK/NF-κB信号通路发挥抗小鼠特应性皮炎样反应

2022-01-04 医路坦克 MedSci原创

特应性皮炎(AD)是一种慢性炎症性皮肤病,我们证实了MAEO对内毒素诱导的RAW 264.7巨噬细胞和HaCaT角质形成细胞炎症刺激的影响。

      特应性皮炎(AD)是一种慢性炎症性皮肤病,环境和免疫系统之间通过表皮屏障发生复杂的相互作用。最近的几项研究表明,由于城市化和工业化,越来越多的患者患有特应性皮炎,2017年儿童特应性皮炎患病率达到25.9%。

       AD是由激活的免疫细胞和皮肤细胞的异常免疫反应引起的,其特征是瘙痒、干燥和皮肤功能障碍。一般来说,在AD皮损中可以发现产生各种细胞因子的肥大细胞,包括IL-4和IL-13,对各种刺激做出反应。因此,调节免疫细胞和皮肤细胞中细胞因子的产生可能是治疗AD的有效策略。止痒一直被认为是治疗特应性皮炎的一种方法。然而,组胺受体拮抗剂(抗组胺药)不足以抑制AD患者的瘙痒。另一种替代方法是类固醇,由于副作用,如皮肤屏障变薄和减弱的风险,不能用于长期治疗。因此,有必要进行更多的研究来开发更安全的治疗方法。

     核因子-κB(NF-κB)是特应性皮炎(AD)炎症和免疫反应的重要介质。由于NF-κB受丝裂原活化蛋白激酶(MAPK)的调节,并激活细胞核中的基因转录,因此它在炎症反应的调节中起着关键作用。NF-κB可促进IL-6、IL-1β和肿瘤坏死因子-α等促炎细胞因子的分泌。MAPK/NF-κB信号通路激活后释放的细胞因子和趋化因子对免疫细胞炎症和皮肤屏障功能非常重要。一氧化氮(NO)和前列腺素E2(PGE2)分别由诱导型一氧化氮合酶(INOS)和环氧合酶-2(COX-2)合成,是疼痛、水肿、功能障碍、发热和免疫细胞运动等炎症反应的主要介质。因此,细胞因子,如肿瘤坏死因子-α和白细胞介素(IL),是由NO的过量产生而诱导的,并促进炎症反应和组织损伤。

     薄荷是薄荷科(Lamiaceae)的一种开花植物。薄荷种类通常生长在环北极地区,原产于西亚、中亚、欧洲和北美。由于其调味剂在口香糖、糖果、饮料、化妆品和烟草中的香味,嫩茎被用于食品。整株植物通常被用作中药,具有许多药用特性,如抗炎和抗氧化活性。种植芳香植物以获取精油已变得越来越流行。薄荷精油(MAEO)的抗炎、抗特应性作用及其潜在的分子机制还没有完全阐明。因此,本研究的目的是评价MAEO在脂多糖刺激的RAW 264.7小鼠巨噬细胞和HaCaT人角质形成细胞中的抗炎作用及其分子机制。此外,采用2,4-二硝基氯苯(DNCB)诱导的小鼠AD模型,观察了MAEO的抗特应性皮炎作用。

   在本研究中,我们研究了MAEO的抗炎作用。芳香精油在脂多糖刺激的RAW 264.7巨噬细胞和HACaT细胞(人表皮角质形成细胞)中的作用及其分子机制。此外,我们还研究了MAEO对二硝基氯苯(DNCB)诱导的AD小鼠模型的改善作用。我们发现,在RAW 264.7细胞和HaCaT细胞中,MAEO通过抑制COX-2和β的表达,抑制内毒素刺激的炎症介质,如一氧化氮(NO)和前列腺素E2,以及促炎细胞因子,包括IL-1和IL-6。在LPS刺激的巨噬细胞中,我们还观察到Maeo抑制ERK和p65的磷酸化。此外,在DNCB诱导的AD动物模型中,MAEO治疗减轻了AD症状,包括皮炎评分、耳朵厚度、表皮厚度和肥大细胞浸润。

总之,本研究证实了MAEO对内毒素诱导的RAW 264.7巨噬细胞和HaCaT角质形成细胞炎症刺激的影响。据报道,薄荷醇和薄荷酮是Maeo的主要成分,被认为具有抗炎特性。此外,由于其抑制ERK/NF-κB通路的活性,Maeo可能成为治疗全身性炎症性疾病的一种有前途的药物,特别是在AD中。

 

文献来源: Kim SY,  Han SD,  Kim M, Mentha arvensisEssential Oil Exerts Anti-Inflammatory in LPS-Stimulated Inflammatory Responses via Inhibition of ERK/NF-κB Signaling Pathway and Anti-Atopic Dermatitis-like Effects in 2,4-Dinitrochlorobezene-Induced BALB/c Mice,Antioxidants (Basel) 2021 Dec 03;10(12)

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    2022-05-15 zhouqu_8
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    2022-01-06 ms3000001091728160

    学习了

    0

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    2022-01-06 ms5000001681439894

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    2022-01-05 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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