A novel synthetic strategy towards pH-responsive aggregation-induced emission (AIE)-active tetraphenylethene (TPE)- functionalized polyethylene-based block copolymers is presented. Tris(3-(4-(l,2,2-triphenylvinyl)phen...A novel synthetic strategy towards pH-responsive aggregation-induced emission (AIE)-active tetraphenylethene (TPE)- functionalized polyethylene-based block copolymers is presented. Tris(3-(4-(l,2,2-triphenylvinyl)phenoxy)propyl)borane was used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined a-TPE-ω-OH linear polyethylenes (PE). The terminal hydroxyl groups were transformed to atom transfer radical polymerization (ATRP) initiating sites by esterification with bromoisobutyryl bromide, followed by polymerization of rert-butyl acrylate (tBA) to provide TPE-PE-b-PtBA block copolymers. After hydrolysis of the rBu group to COOH group, the corresponding pH-responsive TPE-PE-b-PAA block copolymers were obtained. All synthesized block copolymers revealed AIE behavior either in solution or bulk. Due to the pH-responsivity of PAA chains, the aggregation state at different pH and consequently the fluorescence intensity changed. Also, the synthesized block copolymers exhibited ion-specificity fluorescence properties.展开更多
Photodynamic therapy plays an important role in cancer treatment.In this work,methylene blue(MB)-embedded calcium carbonate nanorods(CaCO_3-MB NRs)have been synthesized for p H-responsive photodynamic therapy and ultr...Photodynamic therapy plays an important role in cancer treatment.In this work,methylene blue(MB)-embedded calcium carbonate nanorods(CaCO_3-MB NRs)have been synthesized for p H-responsive photodynamic therapy and ultrasound imaging.The morphology of CaCO_3-MB NRs can be controlled by modulating the concentration of Na_2CO_3 aqueous solution.The generation of effective reactive oxygen species(ROS)were confirmed by 1,3-diphenylisobenzofuran(DPBF)probe.Both photodynamic therapy performance and echogenic performance of CaCO_3-MB NRs were investigated to confirm the feasibility of CaCO_3-MB nanohybrids for ultrasound image-guided photodynamic therapy.展开更多
In the fight against cancer, controlled drug delivery systems have emerged to enhance the therapeutic efficacy and safety of anti-cancer drugs. Among these systems, mesoporous silica nanoparticles （MSNs） with a func...In the fight against cancer, controlled drug delivery systems have emerged to enhance the therapeutic efficacy and safety of anti-cancer drugs. Among these systems, mesoporous silica nanoparticles （MSNs） with a functional surface possess obvious advantages and were thus rapidly developed for cancer treatment. Many stimuli-responsive materials, such as nanopartides, polymers, and inorganic materials, have been applied as caps and gatekeepers to control drug release from MSNs. This review presents an overview of the recent progress in the production of pH-responsive MSNs based on the pH gradient between normal tissues and the tumor microenvironment. Four main categories of gatekeepers can respond to acidic conditions. These categories will be described in detail.展开更多
The acidic microenvironments of tumor tissue and cells provide an opportunity for the development of pHresponsive drug delivery systems in cancer therapy.In this work,we designed a calcium carbonate(CaCO3)-corecrossli...The acidic microenvironments of tumor tissue and cells provide an opportunity for the development of pHresponsive drug delivery systems in cancer therapy.In this work,we designed a calcium carbonate(CaCO3)-corecrosslinked nanoparticle of methoxy poly(ethylene glycol)-block-poly(L-glutamic acid)through mineralization for intracellular delivery of doxorubicin(DOX),referred to as CaNP/DOX.CaNP/DOX exhibited high drug loading capability,uniform nanoparticle size,and pH-dependent DOX release.In the meantime,the enhanced cell uptake,superior cytotoxicity toward mouse osteosarcoma K7 cells,extended circulation half-life,and improved accumulation of DOX in K7 allograft tumor from CaNP/DOX were also demonstrated.More interestingly,CaNP/DOX displayed improved antitumor effect and reduced side effects against the K7 osteosarcoma-allografted mouse model and the 143B orthotopic osteosarcoma mouse model.Given the superior properties of Ca-mineralized polypeptide nanoparticle for intracellular drug delivery,the smart drug delivery system showed strong competitiveness in clinical chemotherapy of cancers.展开更多
基金supported by King Abdullah University of Science and Technology (KAUST)
文摘A novel synthetic strategy towards pH-responsive aggregation-induced emission (AIE)-active tetraphenylethene (TPE)- functionalized polyethylene-based block copolymers is presented. Tris(3-(4-(l,2,2-triphenylvinyl)phenoxy)propyl)borane was used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined a-TPE-ω-OH linear polyethylenes (PE). The terminal hydroxyl groups were transformed to atom transfer radical polymerization (ATRP) initiating sites by esterification with bromoisobutyryl bromide, followed by polymerization of rert-butyl acrylate (tBA) to provide TPE-PE-b-PtBA block copolymers. After hydrolysis of the rBu group to COOH group, the corresponding pH-responsive TPE-PE-b-PAA block copolymers were obtained. All synthesized block copolymers revealed AIE behavior either in solution or bulk. Due to the pH-responsivity of PAA chains, the aggregation state at different pH and consequently the fluorescence intensity changed. Also, the synthesized block copolymers exhibited ion-specificity fluorescence properties.
基金supported by the National Key Research and Development Program of China (2017YFA0106100, 2016YFA0201501)National Natural Science Foundation of China (51325304, 51373017, 51473014, 51521062, 51773013)+1 种基金the Fundamental Research Funds for the Central Universities (BHYC1705A)Higher Education and High-quality and World-class Universities (PY201603)
文摘Photodynamic therapy plays an important role in cancer treatment.In this work,methylene blue(MB)-embedded calcium carbonate nanorods(CaCO_3-MB NRs)have been synthesized for p H-responsive photodynamic therapy and ultrasound imaging.The morphology of CaCO_3-MB NRs can be controlled by modulating the concentration of Na_2CO_3 aqueous solution.The generation of effective reactive oxygen species(ROS)were confirmed by 1,3-diphenylisobenzofuran(DPBF)probe.Both photodynamic therapy performance and echogenic performance of CaCO_3-MB NRs were investigated to confirm the feasibility of CaCO_3-MB nanohybrids for ultrasound image-guided photodynamic therapy.
基金supported by the Chinese Natural Science Foundation Project (Grant No. 30970784 and 81171455)a National Distinguished Young Scholars Grant (Grant No. 31225009) from the National Natural Science Foundation of China+5 种基金the National Key Basic Research Program of China (Grant No. 2009CB930200)the Chinese Academy of Sciences (CAS) ‘Hundred Talents Program’ (Grant No. 07165111ZX)the CAS Knowledge Innovation Program, and the State HighTech Development Plan (Grant No. 2012AA020804)the ‘Strategic Priority Research Program’ of the Chinese Academy of Sciences (Grant No. XDA09030301)NIH/NIMHD 8 G12 MD007597USAMRMC W81XWH-10-1-0767 grants
文摘In the fight against cancer, controlled drug delivery systems have emerged to enhance the therapeutic efficacy and safety of anti-cancer drugs. Among these systems, mesoporous silica nanoparticles （MSNs） with a functional surface possess obvious advantages and were thus rapidly developed for cancer treatment. Many stimuli-responsive materials, such as nanopartides, polymers, and inorganic materials, have been applied as caps and gatekeepers to control drug release from MSNs. This review presents an overview of the recent progress in the production of pH-responsive MSNs based on the pH gradient between normal tissues and the tumor microenvironment. Four main categories of gatekeepers can respond to acidic conditions. These categories will be described in detail.
基金financially supported by the National Natural Science Foundation of China(Grant No.51803006)the Scientific Development Program of Liaoning Province(Grant No.20170541058)the China Postdoctoral Science Foundation(Grant No.2019M650297).
文摘The acidic microenvironments of tumor tissue and cells provide an opportunity for the development of pHresponsive drug delivery systems in cancer therapy.In this work,we designed a calcium carbonate(CaCO3)-corecrosslinked nanoparticle of methoxy poly(ethylene glycol)-block-poly(L-glutamic acid)through mineralization for intracellular delivery of doxorubicin(DOX),referred to as CaNP/DOX.CaNP/DOX exhibited high drug loading capability,uniform nanoparticle size,and pH-dependent DOX release.In the meantime,the enhanced cell uptake,superior cytotoxicity toward mouse osteosarcoma K7 cells,extended circulation half-life,and improved accumulation of DOX in K7 allograft tumor from CaNP/DOX were also demonstrated.More interestingly,CaNP/DOX displayed improved antitumor effect and reduced side effects against the K7 osteosarcoma-allografted mouse model and the 143B orthotopic osteosarcoma mouse model.Given the superior properties of Ca-mineralized polypeptide nanoparticle for intracellular drug delivery,the smart drug delivery system showed strong competitiveness in clinical chemotherapy of cancers.
