Due to the negative roles of tumor microenvironment(TME)in compromising therapeutic responses of various cancer therapies,it is expected that modulation of TME may be able to enhance the therapeutic responses during c...Due to the negative roles of tumor microenvironment(TME)in compromising therapeutic responses of various cancer therapies,it is expected that modulation of TME may be able to enhance the therapeutic responses during cancer treatment.Herein,we develop a concise strategy to prepare pH-responsive nanoparticles via the CaCO3-assisted double emulsion method,thereby enabling effective co-encapsulation of both doxorubicin(DOX),an immunogenic cell death(ICD)inducer,and alkylated NLG919(aNLG919),an inhibitor of indoleamine 2,3-dioxygenase 1(IDO1).The obtained DOX/aNLG919-loaded CaCO3 nanoparticles(DNCaNPs)are able to cause effective ICD of cancer cells and at the same time restrict the production of immunosuppressive kynurenine by inhibiting IDO1.Upon intravenous injection,such DNCaNPs show efficient tumor accumulation,improved tumor penetration of therapeutics and neutralization of acidic TME.As a result,those DNCaNPs can elicit effective anti-tumor immune responses featured in increased density of tumor-infiltrating CD8+cytotoxic T cells as well as depletion of immunosuppressive regulatory T cells(Tregs),thus effectively suppressing the growth of subcutaneous CT26 and orthotopic 4T1 tumors on the Balb/c mice through combined chemotherapy&immunotherapy.This study presents a compendious strategy for construction of pH-responsive nanoparticles,endowing significantly enhanced chemo-immunotherapy of cancer by overcoming the immunosuppressive TME.展开更多
The abnormal activation of epidermal growth factor receptor(EGFR)drives the development of non-small cell lung cancer(NSCLC).The EGFR-targeting tyrosine kinase inhibitor osimertinib is frequently used to clinically tr...The abnormal activation of epidermal growth factor receptor(EGFR)drives the development of non-small cell lung cancer(NSCLC).The EGFR-targeting tyrosine kinase inhibitor osimertinib is frequently used to clinically treat NSCLC and exhibits marked efficacy in patients with NSCLC who have an EGFR mutation.However,free osimertinib administration exhibits an inadequate response in vivo,with only~3%patients demonstrating a complete clinical response.Consequently,we designed a biomimetic nanoparticle(CMNP^(@Osi))comprising a polymeric nanoparticle core and tumor cell-derived membrane-coated shell that combines membrane-mediated homologous and molecular targeting for targeted drug delivery,thereby supporting a dual-target strategy for enhancing osimertinib efficacy.After intravenous injection,CMNP^(@Osi)accumulates at tumor sites and displays enhanced uptake into cancer cells based on homologous targeting.Osimertinib is subsequently released into the cytoplasm,where it suppresses the phosphorylation of upstream EGFR and the downstream AKT signaling pathway and inhibits the proliferation of NSCLC cells.Thus,this dual-targeting strategy using a biomimetic nanocarrier can enhance molecular-targeted drug delivery and improve clinical efficacy.展开更多
Monoclonal antibody-based therapy has achieved great success and is now one of the most crucial therapeutic modalities for cancer therapy.The first monoclonal antibody authorized for treating human epidermal growth re...Monoclonal antibody-based therapy has achieved great success and is now one of the most crucial therapeutic modalities for cancer therapy.The first monoclonal antibody authorized for treating human epidermal growth receptor 2(HER2)-positive breast cancer is trastuzumab.However,resistance to trastuzumab therapy is frequently encountered and thus significantly restricts the therapeutic outcomes.To address this issue,tumor microenvironment(TME)pH-responsive nanoparticles(NPs)were herein developed for systemic mRNA delivery to reverse the trastuzumab resistance of breast cancer(BCa).This nanoplatform is comprised of a methoxyl-poly(ethylene glycol)-b-poly(lactic-co-glycolic acid)copolymer with a TME pH-liable linker(Meo-PEG-Dlinkm-PLGA)and an amphiphilic cationic lipid that can complex PTEN mRNA via electrostatic interaction.When the long-circulating mRNA-loaded NPs build up in the tumor after being delivered intravenously,they could be efficiently internalized by tumor cells due to the TME pH-triggered PEG detachment from the NP surface.With the intracellular mRNA release to up-regulate PTEN expression,the constantly activated PI3K/Akt signaling pathway could be blocked in the trastuzumab-resistant BCa cells,thereby resulting in the reversal of trastuzumab resistance and effectively suppress the development of BCa.展开更多
In a recent publication [1], these images in Figures 6(b, c)(^NPEG-NPCe6 group), S7, S9 and S10 were inadvertently taken the incorrect images in the production. The corrected versions are shown below. And, the quantif...In a recent publication [1], these images in Figures 6(b, c)(^NPEG-NPCe6 group), S7, S9 and S10 were inadvertently taken the incorrect images in the production. The corrected versions are shown below. And, the quantification of Ce6 fluorescence(as performed in Figure 6(c)) was also corrected(Figure S12).展开更多
Nanocarrier-mediated photodynamic therapy(PDT)has attracted extensive attention due to its locoregional therapeutic effect,minimal toxicity to normal tissues,and activation of immune system capability.However,it is st...Nanocarrier-mediated photodynamic therapy(PDT)has attracted extensive attention due to its locoregional therapeutic effect,minimal toxicity to normal tissues,and activation of immune system capability.However,it is still unclear how the physicochemical properties of nanocarriers affect their PDT therapeutic efficacies,which could be very different from those for chemotherapy.Herein,to demonstrate the effect of PEG density on PDT efficacy,we synthesized a series of random polyphosphoesters(PPEs)with different PEG contents by regulating the molar ratios of these monomers,and then these PPEs were used to prepare chlorin e6(Ce6)-loaded polymeric nanoparticles with tunable PEG density.Thereafter,the PDT efficacies of these nanoparticles were carefully and comprehensively evaluated.We demonstrate that the moderate PEG density(3.01 PEG/nm^2)of nanocarrier exhibited the best PDT therapeutic efficacy in a mouse model of pancreatic cancer due to its efficient balance of prolonged circulation and tumor cellular uptake.展开更多
基金partially supported by the National Natural Science Foundation of China(51802209,22077093,51761145041,51525203)the National Research Programs from Ministry of Science and Technology(MOST)of China(2016YFA0201200)+3 种基金the Natural Science Foundation of Jiangsu Province(BK20180848)the Jiangsu Social Development Project(BE2019658)Collaborative Innovation Center of Suzhou Nano Science and Technologythe 111 Program from the Ministry of Education of China.
文摘Due to the negative roles of tumor microenvironment(TME)in compromising therapeutic responses of various cancer therapies,it is expected that modulation of TME may be able to enhance the therapeutic responses during cancer treatment.Herein,we develop a concise strategy to prepare pH-responsive nanoparticles via the CaCO3-assisted double emulsion method,thereby enabling effective co-encapsulation of both doxorubicin(DOX),an immunogenic cell death(ICD)inducer,and alkylated NLG919(aNLG919),an inhibitor of indoleamine 2,3-dioxygenase 1(IDO1).The obtained DOX/aNLG919-loaded CaCO3 nanoparticles(DNCaNPs)are able to cause effective ICD of cancer cells and at the same time restrict the production of immunosuppressive kynurenine by inhibiting IDO1.Upon intravenous injection,such DNCaNPs show efficient tumor accumulation,improved tumor penetration of therapeutics and neutralization of acidic TME.As a result,those DNCaNPs can elicit effective anti-tumor immune responses featured in increased density of tumor-infiltrating CD8+cytotoxic T cells as well as depletion of immunosuppressive regulatory T cells(Tregs),thus effectively suppressing the growth of subcutaneous CT26 and orthotopic 4T1 tumors on the Balb/c mice through combined chemotherapy&immunotherapy.This study presents a compendious strategy for construction of pH-responsive nanoparticles,endowing significantly enhanced chemo-immunotherapy of cancer by overcoming the immunosuppressive TME.
基金supported by the National Key R&D Program of China(No.2022YFD2401900)the National Natural Science Foundation of China(No.52203163)+4 种基金the High-level Hospital Construction Project(No.DFJH201905)the Natural Science Foundation of Guangdong(No.2021A1515010838)the International Science and Technology Cooperation Program of Guangdong(No.2022A0505050048)the Science and Technology Program of Guangzhou(No.201903010028)Guangdong Provincial People’s Hospital Intermural Program(No.KJ012019447).
文摘The abnormal activation of epidermal growth factor receptor(EGFR)drives the development of non-small cell lung cancer(NSCLC).The EGFR-targeting tyrosine kinase inhibitor osimertinib is frequently used to clinically treat NSCLC and exhibits marked efficacy in patients with NSCLC who have an EGFR mutation.However,free osimertinib administration exhibits an inadequate response in vivo,with only~3%patients demonstrating a complete clinical response.Consequently,we designed a biomimetic nanoparticle(CMNP^(@Osi))comprising a polymeric nanoparticle core and tumor cell-derived membrane-coated shell that combines membrane-mediated homologous and molecular targeting for targeted drug delivery,thereby supporting a dual-target strategy for enhancing osimertinib efficacy.After intravenous injection,CMNP^(@Osi)accumulates at tumor sites and displays enhanced uptake into cancer cells based on homologous targeting.Osimertinib is subsequently released into the cytoplasm,where it suppresses the phosphorylation of upstream EGFR and the downstream AKT signaling pathway and inhibits the proliferation of NSCLC cells.Thus,this dual-targeting strategy using a biomimetic nanocarrier can enhance molecular-targeted drug delivery and improve clinical efficacy.
基金supported by the National Natural Science Foundation of China(82173392 and 81874226)the Thousand Talents Program for Distinguished Young Scholars,the International Scientific and Technological Cooperation Program from Guangdong Science and Technology Department(2018A050506033,China)+2 种基金the Natural Science Foundation of Guangdong Province(2019B1515120006,China)Guangzhou Science and Technology Bureau(201902020015 and 20210303004,China)the“Three million for Three Years”Project of the High-level Talent Special Funding Scheme of Sun Yat-sen Memorial Hospital.
文摘Monoclonal antibody-based therapy has achieved great success and is now one of the most crucial therapeutic modalities for cancer therapy.The first monoclonal antibody authorized for treating human epidermal growth receptor 2(HER2)-positive breast cancer is trastuzumab.However,resistance to trastuzumab therapy is frequently encountered and thus significantly restricts the therapeutic outcomes.To address this issue,tumor microenvironment(TME)pH-responsive nanoparticles(NPs)were herein developed for systemic mRNA delivery to reverse the trastuzumab resistance of breast cancer(BCa).This nanoplatform is comprised of a methoxyl-poly(ethylene glycol)-b-poly(lactic-co-glycolic acid)copolymer with a TME pH-liable linker(Meo-PEG-Dlinkm-PLGA)and an amphiphilic cationic lipid that can complex PTEN mRNA via electrostatic interaction.When the long-circulating mRNA-loaded NPs build up in the tumor after being delivered intravenously,they could be efficiently internalized by tumor cells due to the TME pH-triggered PEG detachment from the NP surface.With the intracellular mRNA release to up-regulate PTEN expression,the constantly activated PI3K/Akt signaling pathway could be blocked in the trastuzumab-resistant BCa cells,thereby resulting in the reversal of trastuzumab resistance and effectively suppress the development of BCa.
基金This work was supported by the National Key R&D Program of China (No. 2017YFA0205600), and the National Natural Science Foundation of China (Nos. 51773191, 51573176 and 51633008).
文摘In a recent publication [1], these images in Figures 6(b, c)(^NPEG-NPCe6 group), S7, S9 and S10 were inadvertently taken the incorrect images in the production. The corrected versions are shown below. And, the quantification of Ce6 fluorescence(as performed in Figure 6(c)) was also corrected(Figure S12).
基金supported by the National Natural Science Foundation of China (51822302, 51773067, 31870993)National Key R&D Program of China (2017YFA0205601)+3 种基金the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province (2017B030306002)the Program for Guangdong Introducing Innovative and Enterpreneurial Teams (2017ZT07S054)Outstanding Scholar Program of Guangzhou Regenerative Medicine and Health Guangdong Laboratory (2018GZR110102001)the Fundamental Research Funds for the Central Universities
文摘Nanocarrier-mediated photodynamic therapy(PDT)has attracted extensive attention due to its locoregional therapeutic effect,minimal toxicity to normal tissues,and activation of immune system capability.However,it is still unclear how the physicochemical properties of nanocarriers affect their PDT therapeutic efficacies,which could be very different from those for chemotherapy.Herein,to demonstrate the effect of PEG density on PDT efficacy,we synthesized a series of random polyphosphoesters(PPEs)with different PEG contents by regulating the molar ratios of these monomers,and then these PPEs were used to prepare chlorin e6(Ce6)-loaded polymeric nanoparticles with tunable PEG density.Thereafter,the PDT efficacies of these nanoparticles were carefully and comprehensively evaluated.We demonstrate that the moderate PEG density(3.01 PEG/nm^2)of nanocarrier exhibited the best PDT therapeutic efficacy in a mouse model of pancreatic cancer due to its efficient balance of prolonged circulation and tumor cellular uptake.