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首页> 外文期刊>Applied Microbiology and Biotechnology >Development and optimization of a tumor targeting system based on microbial synthesized PHA biopolymers and PhaP mediated functional modification
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Development and optimization of a tumor targeting system based on microbial synthesized PHA biopolymers and PhaP mediated functional modification

机译:基于微生物合成的PHA生物聚合物和PHAP介导的功能改性的肿瘤靶向系统的开发和优化

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摘要

Polyhydroxyalkanoate (PHA) is a class of microbial synthesized biodegradable and biocompatible aliphatic polymer which has been developed into nanoparticles (NPs) for sustained release of hydrophobic compounds. Taking advantage of the natural PHA binding protein PhaP which could be steadily adsorbed onto PHA NPs through hydrophobic interaction, a tumor targeting system was developed in this study by presenting an epidermal growth factor receptor (EGFR)-targeting peptide (ETP) on the surface of PHA NPs, via PhaP mediated adsorption. To reveal the effects of residual emulsifiers on PhaP mediated ETP modification and optimize the tumor targeting capacity of the system, a novel emulsifier-free PHA NPs (EF-NPs) was fabricated together with other two kinds of conventional emulsifier-required PHA NPs (PVA-NPs and P68-NPs, which were prepared with poly(vinyl alcohol) (PVA) and Pluronic F68 as emulsifiers, respectively). By analyzing the surface hydrophobicity, the amount of adsorbed fusion protein, and the cellular uptake of all kinds of PHA NPs, our results demonstrated that EF-NPs with stronger surface hydrophobicity were the most proper formulation for further PhaP mediated ETP functionalization. The residual PVA and Pluronic F68 affected the modification efficiency and secondary structure of ETP-PhaP fusion protein, and finally obstructed the targeting effect of ETP-PhaP modified PVA-NPs and P68-NPs to EGFR over-expressed tumor cells. The animal experiment further confirmed the effectiveness and feasibility of in vivo application of ETP-PhaP functionalized EF-NPs, indicating that it could be served as a promising tumor targeting system with satisfactory EGFR targeting ability. This PhaP mediated bio-modification process also opens a wide way for developing various PHA-based targeting systems by presenting different tumor or other tissue-specific targeting peptides.
机译:聚羟基烷烷(PHA)是一类微生物合成的可生物降解和生物相容性脂族聚合物,其已被开发成纳米颗粒(NPS),用于持续释放疏水化合物。利用可以通过疏水相互作用稳定地吸附在PHA NP上的天然PHA结合蛋白质pHAP,在该研究中通过呈现表皮生长因子受体(EGFR)在表面上进行表皮生长因子受体(EGFR)的肿瘤靶向系统PHA NPS,通过PHAP介导的吸附。为了揭示残留乳化剂对Phap介导的ETP改性并优化系统的肿瘤靶向能力的影响,与其他两种常规乳化剂 - 所需的PHA NPS一起制造一种新的无乳化剂PHA NPS(EF-NPS)(PVA -NPS和P68-NPS,分别用聚(乙烯醇)(PVA)和Pluronic F68作为乳化剂制备。通过分析表面疏水性,吸附融合蛋白的量和各种PHA NP的细胞吸收,我们的结果表明,具有较强的表面疏水性的EF-NP是进一步的PHAP介导的ETP官能化的最适当的配方。残留的PVA和PLURONIC F68影响ETP-PHAP融合蛋白的改性效率和二次结构,最后阻塞ETP-PHAP改性PVA-NPS和P68-NPS至EGFR过度表达的肿瘤细胞的靶向效果。动物实验进一步证实了体内施用ETP-PHAP官能化EF-NPS的有效性和可行性,表明它可以作为具有令人满意的EGFR靶向能力的有前途的肿瘤靶向系统。该PHAP介导的生物改性方法还通过呈现不同的肿瘤或其他组织特异性靶向肽来开发各种基于PHA的靶向系统。

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  • 作者单位

    Xi An Jiao Tong Univ Sch Life Sci &

    Technol Dept Biol Sci &

    Bioengn Key Lab Biomed Informat Engn Minist Educ Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Life Sci &

    Technol Dept Biol Sci &

    Bioengn Key Lab Biomed Informat Engn Minist Educ Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Life Sci &

    Technol Dept Biol Sci &

    Bioengn Key Lab Biomed Informat Engn Minist Educ Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Life Sci &

    Technol Dept Biol Sci &

    Bioengn Key Lab Biomed Informat Engn Minist Educ Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Life Sci &

    Technol Dept Biol Sci &

    Bioengn Key Lab Biomed Informat Engn Minist Educ Xian 710049 Shaanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用微生物学;生物工程学(生物技术);
  • 关键词

    PHA; PhaP; Nanoparticles; Residual emulsifiers; Tumor targeting;

    机译:pha;phap;纳米粒子;残留的乳化剂;肿瘤靶向;

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