Engineering M2 type macrophage-derived exosomes for autoimmune hepatitis immunotherapy via loading siRIPK3 - 04/02/24
Abstract |
Autoimmune hepatitis (AIH) is a progressive liver disease mediated by the immune system that involves an imbalance in pro-inflammatory and regulatory mechanisms including regulatory T cells (Tregs), T helper 17 (Th17) cells, Th1, macrophages, and many other immune cells. Current steroid therapy for AIH has significant systemic side effects and is poorly tolerated by some individuals. Therefore, there is an urgent need for alternative treatments. Maintaining homeostasis in macrophage differentiation and activation is crucial for regulating immune responses in hepatitis. In this study, we loaded small interfering RNA (siRNA) targeting receptor-interacting protein kinase 3 (RIPK3) into M2-type macrophage-derived exosomes (M2 Exos) to create functionalized exosomes called M2 Exos/siRIPK3. These exosomes demonstrated a natural ability to target the liver in mice, as they were efficiently taken up by hepatic macrophages and showed significant and stable accumulation. M2 Exos/siRIPK3 effectively mitigated immune-mediated hepatitis by suppressing the expression of RIPK3, resulting in a reduced release of pro-inflammatory cytokines and chemokines in both liver tissues and serum. Additionally, M2 Exos/siRIPK3 exhibited immunomodulatory effects, as its administration resulted in a decreased proportion of hepatic and splenic Th17 cells, along with an increased ratio of Tregs. Overall, this study suggests that loading small molecule drugs onto M2 Exos could be a promising approach for developing immunomodulators that specifically target liver macrophages to treat AIH. This strategy has the potential to provide a safer and more effective alternative to current therapy for AIH patients.
Le texte complet de cet article est disponible en PDF.Highlights |
● | Necroptosis of macrophages plays an important role in Concanavalin A-induced immune hepatitis. |
● | M2 macrophage-derived exosomes could attenuate Concanavalin A-induced immune hepatitis. |
● | M2 macrophage-derived exosomes have the property of naturally targeting hepatic macrophages. |
● | Targeted inhibition of RIPK3 expression in liver macrophages helps to alleviate Concanavalin A-induced immune hepatitis. |
● | Loading drugs into macrophage-derived exosomes holds promise as a novel targeted treatment strategy for liver diseases. |
Abbreviations : AIH, siRNA, RIPK3, M2 Exos, M0 Exos, Th17 cells, Tregs, BMSCs, BMDMs, P-MLKL, ConA, P-RIPK3, siNC, M2 Exos/siRIPK3, H & E, TNF-α, IFN-γ, IL-6, ALT, AST, TEM, NTA, qRT-PCR, CCL2, MCP-1, MIP-1β
Keywords : Autoimmune hepatitis, Receptor-interacting protein kinase 3, Macrophages, Exosomes, SiRNA
Plan
Vol 171
Article 116161- février 2024 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Déjà abonné à cette revue ?