Multifunctional Nanodiamond Platforms for Targeted Imaging and Therapy

用于靶向成像和治疗的多功能纳米金刚石平台

• 批准号: 1343991
• 负责人: Dean Ho
• 金额: $ 31.36万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-11 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1343991&HistoricalAwards=false
• 关键词: Multifunctional; Nanodiamond; Platforms; Targeted; Imaging

This award by the Biomaterials program in the Division of Materials Research to Northwestern University is to study the interactions of nanodiamond (ND)-gadolinium III (Gd(III)) conjugates, and to further optimize the relaxivity and integration with polyethylenimine (PEI) for enhanced imaging and medical treatments. The development of novel imaging and therapeutic modalities with significantly enhanced performance over current standards remains an important focus at the intersection of biomaterials and nanoengineering. Nanodiamonds serve as promising biomaterial platforms as they unite a spectrum of unique chemical/physical properties, enabling significantly improved capabilities in imaging and therapy. Recent studies have shown that ND-gadolinium (III) complexes can produce a 12-fold enhancement in per-Gd relaxivity, yielding among the highest values that have been reported. Furthermore, gene therapy challenges are often based on the inability to develop platforms that integrate both safety and efficacy. We have shown that complexes comprised of NDs and the polyethylenimine polymer yield a 70-fold enhancement in DNA transfection efficacy. Furthermore, both the ND-Gd(III) and ND-PEI hybrid complexes are biocompatible. This project will modulate the linker length between ND surfaces and Gd(III) to optimize relaxivity. The ND-Gd(III) complexes will then be combined with PEI and a targeting agent to generate order of magnitude increases in both imaging and therapy into a single platform. Optimized by fundamental science and engineering investigations, this nanodiamond platform will combine unprecedented improvements to contrast and therapeutic efficacy in targeted drug delivery and imaging. These advancements will further serve as the foundation for developing new educational modules and hands-on research experiences for K-12 students. The planned preparation of ND block and magnetic resonance imaging kits to educate students is expected to provide the interesting nature of ND facets/electrostatics and how these materials could mediate drug binding/release and imaging. In addition to their research training in science and engineering, the graduate students supported by this proposal will also serve as mentors for undergraduate researchers as well as K-12 students and high school teachers from partnering institutions who are taking part in the learning modules prepared. The integration of scientific discoveries and educational resources from this project will thus serve as a foundation for the education and training of the scientific and engineering leaders of tomorrow.Current challenges in understanding, diagnosing, and treating cancer are based on the needs of improved imaging and therapy. To address these challenges, the investigators are developing a nanodiamond-based platform that is capable of mediating greater than 10-fold increases in imaging and drug treatment efficiency, which are significant improvements over current standards. The integration of fundamental studies with applied engineering will be used to synthesize integrated nanodiamond complexes to target, image, and treat a selected breast cancer model, with the ultimate goal of optimizing diagnostic capabilities and therapeutic efficiency while remaining biocompatible and safe. It is envisioned that this novel technology will provide unprecedented advances in imaging/diagnostics and cancer therapy, among other areas. The discoveries realized from this study will also inspire new methodologies for educating and training the next generation of science and engineering leaders. To merge scientific discovery with educational impact, the investigators are planning to develop innovative experimental modules using imaging kits and nanodiamond blocks that could be used to educate students from K-12. Furthermore, these kits will be used as a hands-on tool for magnetic resonance imaging instruction. Graduate students supported by this study will serve as educational module leaders to instruct partnering K-12 teachers on the emerging applications of nanodiamonds, as well as the use of these kits. Furthermore, these graduate students will mentor undergraduate students in designated research projects, and these activities are expected to provide an optimal framework for scientific impact and educationally developing the next generation of scientific leadership.

西北大学材料研究部生物材料项目的这项奖励旨在研究纳米金刚石（ND）-钆III（Gd（III））缀合物的相互作用，并进一步优化弛豫率和与聚乙烯亚胺（PEI）的整合，以增强成像和医疗。在生物材料和纳米工程的交叉领域，开发新的成像和治疗方式，并在当前标准上显着增强性能，仍然是一个重要的焦点。纳米金刚石作为有前途的生物材料平台，因为它们结合了一系列独特的化学/物理特性，能够显着提高成像和治疗的能力。最近的研究表明，ND-钆（III）配合物可以产生12倍的增强per-Gd弛豫，产生的最高值，已被报道。此外，基因治疗的挑战往往是基于无法开发整合安全性和有效性的平台。我们已经表明，由ND和聚乙烯亚胺聚合物组成的复合物产生70倍的DNA转染效率增强。此外，ND-Gd（III）和ND-PEI杂化复合物都是生物相容的。该项目将调节ND表面和Gd（III）之间的连接体长度以优化弛豫率。然后将ND-Gd（III）复合物与PEI和靶向剂组合，以在单个平台中产生成像和治疗的数量级增加。通过基础科学和工程研究的优化，这种纳米金刚石平台将结合联合收割机前所未有的改进，以对比度和治疗效果为目标的药物输送和成像。这些进步将进一步作为基础，为K-12学生开发新的教育模块和实践研究经验。计划准备ND块和磁共振成像工具包，以教育学生，预计将提供ND方面/静电的有趣性质，以及这些材料如何介导药物结合/释放和成像。除了他们在科学和工程方面的研究培训外，本提案支持的研究生还将担任本科研究人员以及来自合作机构的K-12学生和高中教师的导师，他们正在参加准备的学习模块。因此，该项目的科学发现和教育资源的整合将成为未来科学和工程领导者的教育和培训的基础。目前在理解，诊断和治疗癌症方面的挑战是基于改进成像和治疗的需求。为了应对这些挑战，研究人员正在开发一种基于纳米金刚石的平台，该平台能够介导成像和药物治疗效率提高10倍以上，这是对当前标准的重大改进。基础研究与应用工程的整合将用于合成集成的纳米金刚石复合物，以靶向，成像和治疗选定的乳腺癌模型，最终目标是优化诊断能力和治疗效率，同时保持生物相容性和安全性。据设想，这项新技术将在成像/诊断和癌症治疗等领域提供前所未有的进步。这项研究的发现也将启发教育和培训下一代科学和工程领导者的新方法。为了将科学发现与教育影响结合起来，研究人员计划使用成像套件和纳米金刚石块开发创新的实验模块，可用于教育K-12的学生。此外，这些工具包将用作磁共振成像教学的动手工具。本研究支持的研究生将担任教育模块领导者，指导合作的K-12教师了解纳米金刚石的新兴应用以及这些工具包的使用。此外，这些研究生将在指定的研究项目中指导本科生，这些活动预计将为科学影响和教育发展下一代科学领导提供最佳框架。