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Accurate construction of cell membrane biomimetic graphene nanodecoys via purposeful surface engineering to improve screening efficiency of active components of traditional Chinese medicine

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Acta Pharmaceutica Sinica B 2022年第1期12卷 394-405页

作者： Qi Hu Lanlan Jia Xiaolin Zhang Aihong Zhu Sicen Wang Xiaoyu Xie School of Pharmacy Health Science CenterXi’an Jiaotong UniversityXi'an 710061China Shaanxi Engineering Research Center of Cardiovascular Drugs Screening&Analysis Xi'an 710061China

Biomimetic nanoengineering presents great potential in biomedical research by integrating cell membrane(CM) with functional nanoparticles. However, preparation of CM biomimetic nanomaterials for custom applications that can avoid the aggregation of nanocarriers while maintaining the biological activity of CM remains a challenge. Herein, a high-performance CM biomimetic graphene nanodecoy was fabricated via purposeful surface engineering, where polyethylene glycol(PEG) was used to modifying magnetic graphene oxide(MGO) to improve its stability in physiological solution, so as to improve the screening efficiency to active components of traditional Chinese medicine(TCM). With this strategy, the constructed PEGylated MGO(PMGO) could keep stable at least 10 days, thus improving the CM coating efficiency. Meanwhile, by taking advantage of the inherent ability of He La cell membrane(HM) to interact with specific ligands, HM-camouflaged PMGO showed satisfied adsorption capacity(116.2 mg/g) and selectivity. Finally, three potential active components, byakangelicol, imperatorin,and isoimperatorin, were screened from Angelica dahurica, whose potential antiproliferative activity were further validated by pharmacological studies. These results demonstrated that the purposeful surfaceengineering is a promising strategy for the design of efficient CM biomimetic nanomaterials, which will promote the development of active components screening in TCM.

关键词： Cell membrane Biomimetic nanoengineering Purposeful surface engineering Graphene oxide Dispersity Active components screening Traditional Chinese medicine PEGylation

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Biointerface engineering of self-protective bionic nanomissiles for targeted synergistic chemotherapy

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Chinese Chemical Letters 2023年第4期34卷 116-121页

作者： Xueyan Zhen Linhao Li Lanlan Jia Aihong Zhu Yixuan Yang Sicen Wang Xiaoyu Xie School of Pharmacy Health Science CenterXi’an Jiaotong UniversityXi’an 710061China Shaanxi Engineering Research Center of Cardiovascular Drugs Screening&Analysis Xi’an 710061China

Erythrocyte membrane(EM)-camouflaged chemotherapeutic delivery nanovehicles hold promise for solid tumor therapy because of their excellent biostability and biocompatibility. However, it is accompanied with insufficient targeting effect and deficient pharmacokinetic behavior due to the lack of a regulated biointerface to navigate and overcome biological transportation obstacles in solid tumor ***, an anti-epidermal growth factor receptor(EGFR) aptamer(EApt) modified and EM-cloaked chemotherapeutic nanomissile delivery system was constructed. The anchored-EApt acting as a specific EGFR suppressor promotes to inhibit the overexpression of EGFR and initiate the cell apoptosis. Importantly, the resulting PLGA-DOX@EM-EApt orchestrated the bioactivity of each component and provided synergistic cell apoptosis and antitumor effects by precisely suppressing EGFR expression levels and delivering DOX. The in vitro and in vivo experimental results confirmed that the immune escape and active targeting behaviors of PLGA-DOX@EM-EApt could significantly promote its drug retention and tumor inhibition abilities. Our findings propose a novel strategy using the biointerface functionalization technique, demonstrating a promising therapeutic platform via a biomimetic drug delivery system for precise solid tumor recognition and synergistic therapy.

关键词： Aptamer Self-protective Biointerface Targeted drug delivery Synergistic chemotherapy

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Recent advances of nanoporous metal-based catalyst: synthesis, application and perspectives

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Journal of Iron and Steel Research(International) 2019年第8期26卷 779-795页

作者： Rui-qi Yao Xing-you Lang Qing Jiang Key Laboratory of Automobile Materials (Ministry of Education) School of Materials Science and Engineering Jilin University Changchun 130022 Jilin China

Nanoporous metal-based catalysts with the specific bicontinuous interconnected ligaments/pores network exhibit highly active performances in application for energy conversion, which represent a broader trend in the design of catalyst materials. These promising nanomaterials commendably provide highly conductive porous morphologies with reduced contact resistances, large electrochemical surface areas with enhanced catalytic efficiency, and controllable synthesis for regulating the performances. Thus, we highlight recent designs of nanoporous metals, alloys, transition metal compounds and hierarchical structures mainly employed in catalysis process. We discuss applied strategies to utilize characteristics of nanoporous metals in the energetic field of catalytic reactions. Moreover, development and evolution of novel controllable synthesis methods are applied in preparation of nanoporous non-noble metals and transition metal compounds. Finally, we present some outlooks and perspectives on the nanoporous metal catalyst and suggest ways for achieving alternative materials in catalysis applications.

关键词： Nanoporous metal Electrochemical catalyst Hierarchical structure Metal-based compound Structure-activity correlation

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