ROS-responsive and triple-synergistic mitochondria-targeted polymer micelles for efficient induction of ICD in tumor therapeutics  

作　　者：Xiaoxiao Hu Mo Zhang Cuilu Quan Saisai Ren Wei Chen Jing Wang 

机构地区：[1]School of Pharmacy,Key Laboratory of Innovative Drug Development and Evaluation,Hebei Medical University,No.361 Zhongshan East Road,Shijiazhuang,050017,PR China [2]Department of Orthopaedic Surgery,The Third Hospital of Hebei Medical University,No.139 Ziqiang Road,Shijiazhuang,050051,PR China [3]Key Laboratory of Biomechanics of Hebei Province,Orthopaedic Research Institution of Hebei Province,No.139 Ziqiang Road,Shijiazhuang,050051,PR China [4]NHC Key Laboratory of Intelligent Orthopaedic Equipment,The Third Hospital of Hebei Medical University,No.139 Ziqiang Road,Shijiazhuang,050051,PR China

出　　处：《Bioactive Materials》2024年第6期490-507,共18页生物活性材料（英文）

基　　金：the National Natural Science Foundation of China(Grants No.22301060);the Youth Top Talent Project of Hebei Province Higher Education(No.BJK2024190);the Natural Science Foundation of Hebei Province(No.H2020206416,B2020206007);the Post-graduate’s Innovation Fund Project of Hebei Province(No.CXZZBS2023104);the Postdoctoral Fund and of Hebei Medical University,the Chunyu Project Outstanding Youth Fund of Hebei Medical University(No.CYYQ2023004);the China Postdoctoral Science Foundation(No.2023TQ0103 and 2023M730914).

摘　　要：Immunogenic cell death(ICD)represents a modality of apoptosis distinguished by the emanation of an array of damage-related molecular signals.This mechanism introduces a novel concept in the field of contemporary tumor immunotherapy.The inception of reactive oxygen species(ROS)within tumor cells stands as the essential prerequisite and foundation for ICD induction.The formulation of highly efficacious photodynamic therapy(PDT)nanomedicines for the successful induction of ICD is an area of significant scientific inquiry.In this work,we devised a ROS-responsive and triple-synergistic mitochondria-targeted polymer micelle(CAT/CPT-TPP/PEG-Ce6,CTC)that operates with multistage amplification of ROS to achieve the potent induction of ICD.Utilizing an“all-in-one”strategy,we direct both the PDT and chemotherapeutic units to the mitochondria.Concurrently,a multistage cyclical amplification that caused by triple synergy strategy stimulates continuous,stable,and adequate ROS generation(domino effect)within the mitochondria of cells.Conclusively,influenced by ROS,tumor cell-induced ICD is effectively activated,remodeling immunogenicity,and enhancing the therapeutic impact of PDT when synergized with chemotherapy.Empirical evidence from in vitro study substantiates that CTC micelles can efficiently provoke ICD,catalyzing CRT translocation,the liberation of HMGB1 and ATP.Furthermore,animal trials corroborate that polymer micelles,following tail vein injection,can induce ICD,accumulate effectively within tumor tissues,and markedly inhibit tumor growth subsequent to laser irradiation.Finally,transcriptome analysis was carried out to evaluate the changes in tumor genome induced by CTC micelles.This work demonstrates a novel strategy to improve combination immunotherapy using nanotechnology.

关 键 词：Immunogenic cell death Mitochondria-targeted Reactive oxygen species Photodynamic therapy Polymer micelle 

分 类 号：R73[医药卫生—肿瘤]