CT imaging and therapy of inflammatory bowel disease via catalytic ceria nanoparticles

CT 成像和催化二氧化铈纳米粒子治疗炎症性肠病

• 批准号: 10384019
• 负责人: Derick Rosario
• 金额: $ 4.68万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2023-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10384019
• 关键词: Abdomen; Abdominal Cramps; Adult; Affect; Antibiotics; Antioxidants; Area; Barium; Barium Sulfate; Biodistribution; Biological; Biological Markers; Cell Survival; Cells; Cerium; Chronic; Clinic; Clinical; Clinical Chemistry; Coculture Techniques; Colon; Colonic inflammation; Colonoscopy; Contrast Media; Coupled; Custom; Data; Detection; Development; Dextrans; Diagnostic; Digestive System Disorders; Disease; Effectiveness; Elements; Fatigue; Formulation; Free Radicals; Future; Gastrointestinal tract structure; Generations; Goals; Health Care Costs; Hemorrhagic colitis; Histology; Image; Imaging Techniques; Immune; Immunosuppression; In Vitro; Incidence; Infection; Inflammation; Inflammatory; Inflammatory Bowel Diseases; Inflammatory Response; Iodine; Link; Measurement; Measures; Medical Imaging; Mentors; Methodology; Molecular Weight; Mucous Membrane; New Agents; Overweight; Oxidative Stress; Pathway interactions; Patients; Performance; Persons; Plasma; Positioning Attribute; Production; Property; Quality of life; Reactive Oxygen Species; Research; Roentgen Rays; Role; Safety; Site; Steroids; Superoxide Dismutase; Suspensions; Symptoms; System; TNF gene; Testing; Therapeutic; Therapeutic Agents; Therapeutic Effect; Therapeutic immunosuppression; Tissues; Toxic effect; Training; Training Support; Transmission Electron Microscopy; Treatment Protocols; United States; Vomiting; Work; X ray diffraction analysis; X ray spectroscopy; X-Ray Computed Tomography; aged; base; biological systems; biomaterial compatibility; catalase; cerium oxide nanoparticle; chronic inflammatory disease; colon cancer cell line; cytokine; dextran sulfate sodium induced colitis; diagnostic value; effective therapy; experience; experimental study; gastrointestinal imaging; imaging agent; imaging properties; improved; in vivo; indexing; light scattering; macrophage; microCT; mimetics; multidisciplinary; murine colitis; nanoparticle; novel; novel therapeutics; obese patients; optical emission spectroscopy; oxidation; reduce symptoms; side effect; skills; success; theranostics; therapeutically effective; treatment effect

PROJECT SUMMARY/ABSTRACT The principal goals of this project are to develop a novel computed tomography (CT) contrast agent, i.e., dextran coated cerium oxide nanoparticles (Dex-CeNP) to image the gastrointestinal tract (GIT) of those afflicted with inflammatory bowel disease (IBD) and that can also be used to treat and improve the quality of life of people with IBD. Iodine and barium-based contrast agents are currently used in the clinic for GIT imaging with CT. However, these contrast agents are not specific for inflammation sites, limiting their diagnostic utility for IBD imaging. Thus, there is a compelling need to develop novel CT contrast agents for this application. Cerium is a potential element to use for novel contrast agents due to its strong CT contrast generation. Despite this, cerium contrast agents have rarely been investigated for CT imaging. Aside from the excellent x-ray contrast, cerium possesses important properties for the treatment of IBD. Current management of IBD relies on nonspecific immunosuppressive therapies (such as steroids), antibiotics, and biologically targeting the pro-inflammatory tumor necrosis factor pathway. However, these treatments are not effective in all patients and have significant limitations, as the effects of these treatments are not long term. Several studies have highlighted the role of oxidative stress in IBD. The increased production of reactive oxygen species (ROS) in combination with reduced total antioxidant capacity results in considerable oxidative stress in the chronically inflamed colon mucosa of IBD. Recent studies have suggested that antioxidant administration may be beneficial in the treatment of IBD. Cerium oxide nanoparticles have been proposed as an artificial antioxidant as they neutralize free radicals, therefore they may reduce symptoms in patients with IBD. Dextran coating will be used to provide nanoparticle stability, while maintaining catalytic activity and encouraging targeting to sites of inflammation. This proposal will test the hypotheses that Dex-CeNP will accumulate in IBD inflammation sites to allow their detection with CT and that they can be beneficial to patients with IBD due to their antioxidant properties. The proposed research will provide an opportunity for the applicant to acquire skills in the areas of nanoparticle synthesis, CT imaging and treatment of IBD. Training and support for the project will be provided by a multi-disciplinary mentoring team. The pursuit of this work will advance the diagnostic and treatment options for IBD, as well as provide a rich training experience that will position the applicant for future success.

项目总结/摘要 本项目的主要目标是开发一种新型计算机断层扫描（CT）造影剂，即， 葡聚糖涂层的氧化铈纳米颗粒（Dex-CeNP）用于对受影响者的胃肠道（GIT）进行成像 炎症性肠病（IBD），也可用于治疗和改善人们的生活质量 关于IBD碘和钡基造影剂目前在临床上用于CT GIT成像。 然而，这些造影剂对炎症部位没有特异性，限制了它们对IBD的诊断效用 显像因此，迫切需要开发用于该应用的新型CT造影剂。铈是一种 由于其强的CT造影剂生成，潜在的元素可用于新型造影剂。尽管如此，铈 造影剂很少用于CT成像。除了出色的X射线对比度，铈 具有治疗IBD的重要特性。 目前IBD的治疗依赖于非特异性免疫抑制疗法（如类固醇）， 抗生素和生物靶向促炎性肿瘤坏死因子途径。但这些 这些治疗并不是对所有患者都有效，并且具有显著的局限性，因为这些治疗的效果 不是长期的。一些研究强调了氧化应激在IBD中的作用。的产量增加 活性氧（ROS）与降低的总抗氧化能力相结合， IBD慢性炎症结肠粘膜中的氧化应激。最近的研究表明， 在IBD的治疗中，给药可能是有益的。氧化铈纳米颗粒已经被提出作为一种 人工抗氧化剂，因为它们中和自由基，因此它们可以减轻IBD患者的症状。 葡聚糖涂层将用于提供纳米颗粒稳定性，同时保持催化活性并促进纳米颗粒的生长。 靶向炎症部位。本提案将检验Dex-CeNP将在IBD中蓄积的假设 炎症部位，使他们能够用CT检测，他们可以有益于IBD患者， 它们的抗氧化特性。 拟议的研究将为申请人提供一个获得以下领域技能的机会： 纳米颗粒合成、CT成像和IBD治疗。将为该项目提供培训和支持 由多学科的指导团队进行。对这项工作的追求将推进诊断和治疗选择 为IBD，以及提供丰富的培训经验，将定位申请人未来的成功。