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Scutellarin Acts via MAPKs Pathway to Promote M2 Polarization of Microglial Cells.
Chen, Hao-Lun; Yang, Li; Zhang, Xiao-Li-Na; Jia, Qiu-Ye; Duan, Zhao-Da; Li, Juan-Juan; Zheng, Li-Yang; Liu, Teng-Teng; Qi, Zhi; Yuan, Yun; Wu, Chun-Yun.
Afiliación
  • Chen HL; Department of Anatomy and Histology/Embryology, School of Basic Medical Sciences, Kunming Medical University, 1168 West Chunrong Road, Kunming, 650500, People's Republic of China.
  • Yang L; Department of Neurology, No.2 Affiliated Hospital, Kunming Medical University, 374 Dianmian Road, Kunming, 650101, People's Republic of China.
  • Zhang XL; Department of Anatomy and Histology/Embryology, School of Basic Medical Sciences, Kunming Medical University, 1168 West Chunrong Road, Kunming, 650500, People's Republic of China.
  • Jia QY; Department of Neurology, No.2 Affiliated Hospital, Kunming Medical University, 374 Dianmian Road, Kunming, 650101, People's Republic of China.
  • Duan ZD; Department of Anatomy and Histology/Embryology, School of Basic Medical Sciences, Kunming Medical University, 1168 West Chunrong Road, Kunming, 650500, People's Republic of China.
  • Li JJ; Department of Neurology, No.2 Affiliated Hospital, Kunming Medical University, 374 Dianmian Road, Kunming, 650101, People's Republic of China.
  • Zheng LY; Department of Pain Management, No.1 Affiliated Hospital, Kunming Medical University, 295 Xichang Road, Kunming, 650101, People's Republic of China.
  • Liu TT; Department of Anatomy and Histology/Embryology, School of Basic Medical Sciences, Kunming Medical University, 1168 West Chunrong Road, Kunming, 650500, People's Republic of China.
  • Qi Z; Department of Neurology, No.2 Affiliated Hospital, Kunming Medical University, 374 Dianmian Road, Kunming, 650101, People's Republic of China.
  • Yuan Y; Department of Anatomy and Histology/Embryology, School of Basic Medical Sciences, Kunming Medical University, 1168 West Chunrong Road, Kunming, 650500, People's Republic of China.
  • Wu CY; Department of Neurology, No.2 Affiliated Hospital, Kunming Medical University, 374 Dianmian Road, Kunming, 650101, People's Republic of China.
Mol Neurobiol ; 60(8): 4304-4323, 2023 Aug.
Article en En | MEDLINE | ID: mdl-37086342
Scutellarin, an herbal agent, is known to possess anti-oxidant and anti-inflammatory properties. In activated microglia, it has been reported that this is achieved through acting on the MAPKs, a key pathway that regulates microglia activation. This study sought to determine if scutellarin would affect the commonly described microglia phenotypes, namely, M1 and M2, thought to contribute to pro- and anti-inflammatory roles, respectively. This is in consideration of its potential effect on the polarization of microglia phenotypes that are featured prominently in cerebral ischemia. For this purpose, we have used an experimentally induced cerebral ischemia rat model and LPS-stimulated BV-2 cell model. Thus, by Western blot and immunofluorescence, we show here a noticeable increase in expression of M2 microglia markers, namely, CD206, Arg1, YM1/2, IL-4 and IL-10 in activated microglia both in vivo and in vitro. Besides, we have confirmed that Scutellarin upregulated expression of Arg1, IL-10 and IL-4 in medium supernatants of BV-2 microglia. Remarkably, scutellarin treatment markedly augmented the increased expression of the respective markers in activated microglia. It is therefore suggested scutellarin can exert the polarization of activated microglia from M1 to M2 phenotype. Because M1 microglia are commonly known to be proinflammatory, while M2 microglia are anti-inflammatory and neuroprotective effect, it stands to reason therefore that with the increase of M2 microglia which became predominant by scutellarin, the local inflammatory response is ameliorated. More importantly, we have found that scutellarin promotes the M2 polarization through inhibiting the JNK and p38 signaling pathways, and concomitantly augmenting the ERK1/2 signaling pathway. This lends its strong support from observations in LPS activated BV-2 microglia treated with p38 and JNK inhibitors in which expression of M2 markers was increased; on the other hand, in cells subjected to ERK1/2 inhibitor treatment, the expression was suppressed. In light of the above, MAPKs pathway is deemed to be a potential therapeutic target of scutellarin in mitigating microglia mediated neuroinflammation in activated microglia.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Isquemia Encefálica / Microglía Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Mol Neurobiol Asunto de la revista: BIOLOGIA MOLECULAR / NEUROLOGIA Año: 2023 Tipo del documento: Article Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Isquemia Encefálica / Microglía Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Mol Neurobiol Asunto de la revista: BIOLOGIA MOLECULAR / NEUROLOGIA Año: 2023 Tipo del documento: Article Pais de publicación: Estados Unidos