論文 - 詳細
| RRC ID | 88493 |
|---|---|
| 著者 | Dierckx T, Haidar M, Grajchen E, Wouters E, Vanherle S, Loix M, Boeykens A, Bylemans D, Hardonnière K, Kerdine-Römer S, Bogie JFJ, Hendriks JJA. |
| タイトル | Phloretin suppresses neuroinflammation by autophagy-mediated Nrf2 activation in macrophages. |
| ジャーナル | J Neuroinflammation |
| Abstract |
BACKGROUND:Macrophages play a dual role in neuroinflammatory disorders such as multiple sclerosis (MS). They are involved in lesion onset and progression but can also promote the resolution of inflammation and repair of damaged tissue. In this study, we investigate if and how phloretin, a flavonoid abundantly present in apples and strawberries, lowers the inflammatory phenotype of macrophages and suppresses neuroinflammation. METHODS:Transcriptional changes in mouse bone marrow-derived macrophages upon phloretin exposure were assessed by bulk RNA sequencing. Underlying pathways related to inflammation, oxidative stress response and autophagy were validated by quantitative PCR, fluorescent and absorbance assays, nuclear factor erythroid 2-related factor 2 (Nrf2) knockout mice, western blot, and immunofluorescence. The experimental autoimmune encephalomyelitis (EAE) model was used to study the impact of phloretin on neuroinflammation in vivo and confirm underlying mechanisms. RESULTS:We show that phloretin reduces the inflammatory phenotype of macrophages and markedly suppresses neuroinflammation in EAE. Phloretin mediates its effect by activating the Nrf2 signaling pathway. Nrf2 activation was attributed to 5' AMP-activated protein kinase (AMPK)-dependent activation of autophagy and subsequent kelch-like ECH-associated protein 1 (Keap1) degradation. CONCLUSIONS:This study opens future perspectives for phloretin as a therapeutic strategy for neuroinflammatory disorders such as MS. TRIAL REGISTRATION:Not applicable. |
| 巻・号 | 18(1) |
| ページ | 148 |
| 公開日 | 2021-7-4 |
| DOI | 10.1186/s12974-021-02194-z |
| PII | 10.1186/s12974-021-02194-z |
| PMID | 34218792 |
| PMC | PMC8254976 |
| MeSH | Animals Autophagy / drug effects* Autophagy / physiology Cells, Cultured Encephalomyelitis, Autoimmune, Experimental / drug therapy* Encephalomyelitis, Autoimmune, Experimental / metabolism* Immunologic Factors / pharmacology Immunologic Factors / therapeutic use Inflammation Mediators / antagonists & inhibitors Inflammation Mediators / metabolism Macrophages / drug effects* Macrophages / metabolism Mice Mice, Inbred C57BL Mice, Knockout NF-E2-Related Factor 2 / deficiency NF-E2-Related Factor 2 / metabolism* Phloretin / pharmacology* Phloretin / therapeutic use |
| IF | 5.793 |
| リソース情報 | |
| 実験動物マウス | RBRC01390 |