Nanocarriers for delivery of antioxidants to endothelium

用于将抗氧化剂递送至内皮的纳米载体

• 批准号: 6816060
• 负责人: Vladimir R Muzykantov
• 金额: $ 39.63万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-11 至 2008-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6816060
• 关键词: acidity /alkalinity; antioxidants; binding sites; bioengineering /biomedical engineering; biotechnology; catalase; chemical structure function; disease /disorder model; drug administration rate /duration; drug design /synthesis /production; drug metabolism; drug screening /evaluation; drug vehicle; hydrogen peroxide; intermolecular interaction; intracellular transport; laboratory mouse; laboratory rat; lung ischemia /hypoxia; nanomedicine; nonhuman therapy evaluation; oxidative stress; polymers; protein localization; protein metabolism; proteolysis; respiratory disorder chemotherapy; vascular endothelium

DESCRIPTION (provided by applicant): Vascular oxidant stress plays a key role in many pathologic states including hyperoxia, inflammation, ischemia, pulmonary and cardiovascular diseases. However, current antioxidant therapies are not effective, in part due to sub-optimal delivery to endothelial cells (EC). Previous studies have shown that the antioxidant enzyme (AOE) catalase (that detoxifies freely diffusing H2O2) conjugated with antibodies to endothelial Cell Adhesion Molecules (CAM) accumulates in EC after intravenous injection and protects animals against acute oxidant lung injury. Unfortunately, anti-CAM/AOE conjugates are eliminated from the blood and degraded in the EC within a few hours, affording only transient effects. In order to solve this problem and to achieve higher therapeutic duration and utility, we propose to load catalase into H2O2-permeable, anti-CAM targeted di-block PEG-PLGA Polymer Nano-Carriers (PNC) that would prolong the AOE circulation and protect from lysosomal proteolysis. Pilot data show that catalase loaded inside stealth anti-CAM/PNC degrades H2O2, binds to and protects EC from oxidant injury, circulates in animals for a prolonged time, and accumulates in the lung vasculature. The goal of this grant is to explore, test and optimize this strategy, pursuing the following Specific Aims: 1. Optimize the design of PNC for AOE delivery to EC. PEG-PLA PNC formulation, composition, size, AOE loading, activity and protease resistance, rate of pH-dependent degradation, coupling of anti-CAM, binding, uptake and metabolism by EC, and protection of EC will be studied and optimized in vitro. 2. Characterize the behavior and targeting of anti-CAM/PNC/AOE in vivo. Their blood clearance, systemic effects, biodistribution, EC binding, pulmonary targeting, optimal administration routes and persistence in lungs will be tested in naive animals and animals with oxidant vascular stress. 3. Evaluate the effects of anti-CAM/PNC/AOE in animals. Mouse models of acute H2O2 generation in the pulmonary vasculature and sub-acute oxidant stress in the lungs (hyperoxia) will be employed to evaluate the degree and duration of protection, and refine regimens of AOE targeting and mechanisms of protection. Completion of these Aims will be a major step towards the long-term goal of our research, which is translation of this promising new technology platform into the clinical domain.

描述（由申请人提供）： 血管氧化剂应激在许多病理状态中起关键作用，包括高氧，炎症，缺血，肺部和心血管疾病。然而，当前的抗氧化剂疗法无效，部分是由于向内皮细胞（EC）的次优递送。先前的研究表明，抗氧化剂（AOE）过氧化酶（AOE）过氧化酶（解毒，自由扩散H2O2）与静脉注射后EC中内皮细胞粘附分子（CAM）结合在EC中积聚并保护动物免受急性氧化剂肺损伤。不幸的是，抗CAM/AOE共轭物被从血液中消除，并在几个小时内降解在EC中，仅带来短暂效应。为了解决这个问题并实现更高的治疗持续时间和实用性，我们建议将过氧化氢酶加载到H2O2渗透的，抗CAM的靶向Di-block PEG-PEG-PE-PLGA聚合物纳米载体（PNC）中，以延长AOE循环并保护溶酶体蛋白质溶解度。试点数据表明，在隐形抗CAM/PNC内部加载的过氧化氢酶降解H2O2，结合并保护EC免受氧化剂损伤，长时间在动物中循环，并在肺脉管系统中积聚。这笔赠款的目的是探索，测试和优化此策略，追求以下特定目的：1。优化PNC的AOE送达EC的设计。 PEG-PLA PNC公式，组成，大小，AOE载荷，活性和蛋白酶抗性，pH依赖性降解速率，抗CAM的耦合，EC的结合，摄取和代谢以及EC的保护将在体外研究和优化。 2。表征抗CAM/PNC/AOE在体内的行为和靶向。它们的血液清除，全身作用，生物分布，EC结合，肺靶向，最佳给药路线和肺部的持久性将在具有氧化剂血管应激的天真动物和动物中进行测试。 3。评估动物抗CAM/PNC/AOE的影响。肺脉管系统中急性H2O2生成的小鼠模型将使用肺中的肺部和亚急性氧化应激（高氧）来评估保护的程度和保护持续时间，以及AOE靶向和机理的精炼方案。这些目标的完成将是朝着我们研究的长期目标迈出的重要一步，这是将这个有前途的新技术平台转化为临床领域。

项目成果

Targeted endothelial delivery of nanosized catalase immunoconjugates protects lung grafts donated after cardiac death.

• DOI: 10.1097/tp.0b013e318226bc6b
• 发表时间: 2011-08-27
• 期刊: Transplantation
• 影响因子: 6.2
• 作者: Preissler G;Loehe F;Huff IV;Ebersberger U;Shuvaev VV;Bittmann I;Hermanns I;Kirkpatrick JC;Fischer K;Eichhorn ME;Winter H;Jauch KW;Albelda SM;Muzykantov VR;Wiewrodt R
• 通讯作者: Wiewrodt R

NO gets a test ride on high-tech transporting nanodevices: A commentary on "Sustained-release nitric oxide from long-lived circulating nanoparticles".

• DOI: 10.1016/j.freeradbiomed.2010.05.022
• 发表时间: 2010-08
• 期刊: Free radical biology & medicine
• 影响因子: 7.4
• 作者: V. Muzykantov

Modulation of endothelial targeting by size of antibody-antioxidant enzyme conjugates.

• DOI: 10.1016/j.jconrel.2010.10.026
• 发表时间: 2011-02-10
• 期刊: Journal of controlled release : official journal of the Controlled Release Society
• 作者: Shuvaev VV;Tliba S;Pick J;Arguiri E;Christofidou-Solomidou M;Albelda SM;Muzykantov VR
• 通讯作者: Muzykantov VR