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Ionizable polymeric nanocarriers for the codelivery of bi-adjuvant and neoantigens in combination tumor immunotherapy
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作者 Ting Su Xiang Liu +2 位作者 Shuibin Lin Furong Cheng guizhi zhu 《Bioactive Materials》 SCIE CSCD 2023年第8期169-180,共12页
Ionizable lipid nanocarriers have made historical contribution to COVID-19 mRNA vaccines.Here,we report ionizable polymeric nanoparticles that co-deliver bi-adjuvant and neoantigen peptides for cancer immunotherapy in... Ionizable lipid nanocarriers have made historical contribution to COVID-19 mRNA vaccines.Here,we report ionizable polymeric nanoparticles that co-deliver bi-adjuvant and neoantigen peptides for cancer immunotherapy in combination with immune checkpoint blockade(ICB).Current cancer ICB benefits only a small subset of patients,largely due to a lack of pre-existing target cells and checkpoint targets for ICB,tumor antigenic heterogeneity,and tumor immunosuppression.Therapeutic vaccines hold the potential to enhance ICB therapeutic efficacy by expanding antitumor cell repertoires,upregulating immune checkpoint levels and hence sensitizing ICB,and reducing tumor immunosuppression.Chemically defined peptide vaccines are attractive,but their current therapeutic efficacy has been limited due to 1)poor vaccine delivery to immunomodulatory lymph nodes(LNs)and antigen(Ag)-presenting cells(APCs),2)poor immunostimulant adjuvant efficacy with restricted target cell subsets in humans,3)limited adjuvant/Ag codelivery to enhance Ag immunogenicity,and 4)limited ability to overcome tumor antigenic heterogeneity.Here,we developed nanovaccines(NVs)using pH-responsive polymeric micellular nanoparticles(NPs)for the codelivery of bi-adjuvant[Toll-like receptor(TLR)7/8 agonist R848 and TLR9 agonist CpG]and peptide neoantigens(neoAgs)to draining LNs for efficient Ag presentation in a broad range of APC subsets.These NVs potentiated the immunogenicity of peptide Ags and elicits robust antitumor T cell responses with memory,and remodeled the tumor immune milium with reduced tumor immunosuppression.As a result,NVs significantly enhanced ICB therapeutic efficacy for murine colorectal tumors and orthotopic glioblastoma multiforme(GBM).These results suggest marked potential of bi-adjuvant/neoAg-codelivering NVs for combination cancer immunotherapy. 展开更多
关键词 Polymeric nanoparticles Combination adjuvants Cancer neoantigen Nanovaccine codelivery Cancer immunotherapy
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Electro-Pulse-Boring(EPB): Novel Super-Deep Drilling Technology for Low Cost Electricity 被引量:11
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作者 Hans O.Schiegg Arild Rdland +1 位作者 guizhi zhu David A.Yuen 《Journal of Earth Science》 SCIE CAS CSCD 2015年第1期37-46,共10页
The inexhaustible heat deposit in great depths (5-10 km) is a scientific fact. Such deposit occurs around the globe. Thereby, everybody is enabled to generate autonomously clean and renewable energy, ample electrici... The inexhaustible heat deposit in great depths (5-10 km) is a scientific fact. Such deposit occurs around the globe. Thereby, everybody is enabled to generate autonomously clean and renewable energy, ample electricity and heat. The economical exploration and exploitation of this superdeep geothermal heat deposit requires a novel drilling technique, because the currently only deep drilling method (Rotary) is limited to about 5 km, due to the rising costs, depending exponentially on depth. Electro-pulse-boring (EPB) is a valuable option to Rotary drilling. EPB, originally investigated in Russia, is ready to be developed for industrialization. The feasibility of EPB is proven by many boreholes drilled up to 200 m in granite (crystalline). Estimates show outstanding low costs for drilling by EPB: 100 E/m for a borehole with a large diameter (φ) such as 20 (50 cm), independent on depth and applicable likewise for sediments and crystalline rocks, such as granite. The current rate of penetration (ROP) of 3 m per hour is planned to be augmented up to 35 m per hour, and again, irrespective whether in sedimentary or crystalline formations. Consequently, a 10 km deep borehole with φ 50 cm will ultimately be drilled within 12 days. EPB will create new markets, such as: (i) EPB shallow drilling for geotechnics, energy piles, measures in order to mitigate natural hazards, etc., (ii) EPB deep drilling (3-5 km) for hydro-geothermics, exploration campaigns etc. and (iii) EPB super-deep drilling (5-10 km) for petro-geothermies, enabling the economic generation of electricity. The autonomous and unlimited supply with cost efficient electricity, besides ample heat, ensures reliably clean and renew- able energy, thus, high supply security. Such development will provide a substantial relief to cope with the global challenge to limit the climate change below 2 ℃. The diminution of fossil fuels, due to the energy transition in order to mitigate the climate change, implies likewise the decrease of air pollution. 展开更多
关键词 drilling technology electro pulse petro-geothermics geoenergy geothermal electricity climate change air pollution.
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Self-assembled multifunctional DNA nanoflowers for the circumvention of multidrug resistance in targeted anticancer drug delivery 被引量:10
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作者 Lei Mei guizhi zhu +7 位作者 Liping Qiu Cuichen Wu Huapei Chen Hao Liang Sena Cansiz Yifan Lv Xiaobing Zhang Weihong Tan 《Nano Research》 SCIE EI CAS CSCD 2015年第11期3447-3460,共14页
Cancer chemotherapy has been limited by its side effects and multidrug resistance (MDR), the latter of which is partially caused by drug efflux from cancer cells. Thus, targeted drug delivery systems that can circum... Cancer chemotherapy has been limited by its side effects and multidrug resistance (MDR), the latter of which is partially caused by drug efflux from cancer cells. Thus, targeted drug delivery systems that can circumvent MDR are needed. Here, we report multifunctional DNA nanoflowers (NFs) for targeted drug delivery to both chemosensitive and MDR cancer cells that circumvented MDR in both leukemia and breast cancer cell models. NFs are self-assembled via potential co-precipitation of DNA and magnesium pyrophosphate generated by rolling circle replication, during which NFs are incorporated using aptamers for specific cancer cell recognition, fluorophores for bioimaging, and doxorubicin (Dox)- binding DNA for drug delivery. NF sizes are tunable (down to N200 nm in diameter), and the densely packed drug-binding motifs and porous intrastructures endow NFs with a high drug-loading capacity (71.4%, wt/wt). Although the Dox- loaded NFs (NF-Dox) are stable at physiological pH, drug release is facilitated under acidic or basic conditions. NFs deliver Dox into target chemosensitive and MDR cancer cells, preventing drug efflux and enhancing drug retention in MDR cells. NF-Dox induces potent cytotoxicity in both target chemosensitive cells and MDR cells, but not in nontarget cells, thus concurrently circumventing MDR and reducing side effects. Overall, these NFs are promising tools for circumventing MDR in targeted cancer therapy. 展开更多
关键词 APTAMER rolling circle replication self-assembly DNA nanotechnology multidrug resistance targeted cancer therapy
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