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文件名称: | Spider minor ampullate silk protein nanoparticles: an effective protein delivery system |
公司名称: | PhD Technology LLC |
下载次数: | 53 |
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Spider silk proteins (spidroins) are particularly attractive due to their excellent biocompatibility. Spider can produce up to seven different types of spidroins, each with unique properties and functions. Spider minor ampullate silk protein (MiSp) might be particularly interesting for biomedical applications, as the constituent silk is mechanically strong and does not super-contract in water, attributed to its amino acid composition. In this study, we evaluate the potential of recombinant nanoparticles derived from Araneus ventricosus MiSp as a protein delivery carrier. The MiSp-based nanoparticles were able to serve as an effective delivery system, achieving nearly 100% efficiency in loading the model protein lysozyme, and displayed a sustained release profile at physiological pH. These nanoparticles could significantly improve the delivery efficacy of the model proteins through different administration routes. Furthermore, nanoparticles loaded with model protein antigen lysozyme after subcutaneous or intramuscular administration could enhance antigen-specific immune responses in mouse models, through a mechanism involving antigen-depot effects at the injection site, long-term antigen persistence, and efficient uptake by dendritic cells as well as internalization by lymph nodes. These findings highlight the transnational potential of MiSp-based nanoparticle system for protein drug and vaccine delivery. 蜘蛛小壶腹腺丝(spidroins)因其出色的生物相容性,可以产生多达七种不同类型的蜘蛛红素,
每个都有独特的属性和功能。蜘蛛小壶腹腺丝(MiSp)可能对生物医学应用特别有趣,因为
基于MiSp的纳米粒子能够作为有效的交付系统,在装载模型时实现了近100%的效率
Construction of recombinant plasmid and protein expression The correct plasmid (pET-NM) was transformed into E. coli BL21 (DE3) competent cells. For protein expression, the E. coli cells were grown at 37 °C in LB medium containing 100 μg/mL ampicillin until OD600 is around 0.8–1.0. Then 1 mM Isopropyl β-D-Thiogalactoside (IPTG , final concentration) was added to the culture for protein expression at 25°C for 12 h. For protein purification, the cells were harvested by centrifugation and lysed using High Pressure Homogenizer (PhD Technology LLC, USA). In order to obtain pure NM IBs, the insoluble pellets were resuspended in 30 ml of washing buffer (20 mM Tris, 300 mM NaCl, 1 mM EDTA, 1% Triton X-100, 1 M urea, pH 8.0) and extensively washed for three times. Finally, the inclusion bodies were washed with 20 mM Tris pH 8.0 to remove contaminating detergent and the purified inclusion bodies (NM-IBs) were used for subsequent solubilization study.
重组质粒的构建及蛋白表达 |
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