High-Throughput Purification and Quantification of Bionanoparticles on Capillary-Channeled Fiber Stationary Phases

在化学系化学测量和成像计划的支持下，克莱姆森大学的R.Kenneth Marcus教授和他的团队正在努力制备、表征和实施一种独特的纤维毛细管通道聚合物(C-CP)，以促进生物和合成纳米颗粒的分离、纯化和定量。靶系统包括外体，这是一类细胞外小泡(EV)，是细胞内通讯的组成部分，因此参与正常的内稳态功能，但也参与异常生物功能的进化；因此，这里所进行的研究对生物医学科学具有长期的意义。正在研究的应用程序在聚酯C-CP纤维柱上使用疏水相互作用层析(HIC)协议，该系统旨在探索基础生物化学的各个方面。这些研究的总体目标是产生高效、选择性和经济的分离。这项工作是跨学科的，涉及化学、生物工程、数学和材料科学的研究小组之间的合作努力。如果成功，该项目可能会在南卡罗来纳州的纺织和生物制药行业带来新的商业企业。与培养多样化劳动力相关的努力包括将研究主题融入相关课程。生物和合成纳米颗粒的绝大多数分离/纯化策略涉及物理手段，如超速离心法、超滤法和尺寸排除法。使用C-CP纤维影响这些分离取决于根据化学功能区分纳米颗粒的能力，而纳米颗粒的相互作用强度部分取决于颗粒大小。C-CP纤维平台可以通过多种形式实现，包括旋压式微吸管尖端和微孔柱。因此，可以解决基础生物化学、临床分析和过程分析化学中的相关问题。通过多角度光散射(MALS)在线测定颗粒大小可提供有关洗脱纳米颗粒/囊泡的定性和定量信息。使用固定化配体的表面修饰可以针对纳米颗粒的选择性捕获，并辅之以用于物种特异性分析的选择性免疫标记策略。多维分离为有效表征复杂体系中的纳米颗粒提供了另一个创新的方面。在所有情况下，性能指标都将与商业专栏和标准方法提供的指标进行比较。实用方法的开发将通过基础研究来加强，旨在了解微观层面的物理化学过程。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professor R. Kenneth Marcus and his group at Clemson University are working to prepare, characterize, and implement a unique format of fiber capillary-channeled polymers (C-CP) to facilitate the isolation, purification and quantification of biological and synthetic nanoparticles. Target systems include exosomes, a class of extracellular vesicles (EVs) that are integral components in intracellular communication, and thus are involved in normal homeostatic function, but also in the the evolution of abnormal biological function; thus there are long term implications of the studies being performed herein for biomedical science. The applications under study employ a hydrophobic interaction chromatography (HIC) protocol on polyester C-CP fiber columns, a system designed to probe aspects of fundamental biochemistry. The overall goal of the studies is to produce efficient, selective, and economical separations. This work is interdisciplinary, involving collaborative efforts among research groups in chemistry, bioengineering, mathematical, and materials sciences. If successful, the project may result in new commercial ventures in the textile and biopharmaceutical industries in South Carolina. Efforts related to developing a diverse workforce include integration of research topics into relevant coursework.The vast majority of separation/purification strategies for biological and synthetic nanoparticles involve physical means such as ultracentrifugation, ultrafiltration, and size-exclusion methods. Use of C-CP fibers to affect these separations rests on the ability to differentiate nanoparticles based upon chemical functionality, whose interaction strengths are determined in part based on particle size. The C-CP fiber platform can be implemented across a number of formats including spin-down micropipette tips and microbore columns. As a result, relevant problems in fundamental biochemistry, clinical analysis, and process analytical chemistry can be addressed. In-line particle sizing via multi-angle light scattering (MALS) provides both qualitative and quantitative information about eluted nanoparticles/vesicles. Surface modifications employing immobilized ligands can target selective capture of nanoparticles, complemented by selective immunolabelling strategies for species-specific assays. Multidimensional separations offer another innovative aspect for efficient characterization of nanoparticles from complex systems. In all cases, performance metrics will be compared to those available from commercial columns and standard methods. Development of practical methods will be augmented with fundamental studies directed at understanding physico-chemical processes at the microscopic level.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.