An additive solution optimized for anaerobic (hypoxic) RBC storage to minimize storage lesion development.

该项目的目标是开发一种针对红细胞（RBC）优化的添加剂解决方案 在低氧环境下储存，目的是通过最大限度地减少储存来生产最高质量的RBC- 相关损伤（储存损伤）。本项目开发的添加剂解决方案将实现商业化 作为Hemanext低氧储存平台的一部分该提案建立在强有力的初步数据基础上 表明RBC的低氧储存（i）降低氧化应激并改善能量代谢 通过细胞内碱化机制和伴随的氧气去除， 底物的促氧化反应;（ii）促进能量代谢，防止氧化的 关键酶如甘油醛3-磷酸脱氢酶中的功能残基;（iii）显著 在确定储存质量的两个FDA金标准方面优于对照RBC， 溶血和输血后恢复;（iv）改善复苏（上级微血管灌注 和氧气输送），在显著低于对照RBC的剂量下， 即使在储存结束时输注缺氧RBC，也可将其储存于新鲜RBC中。此外，缺氧 RBC减少了当前产品中存在的质量变异性，同时还减少了涉及的试剂 在接受者的不良事件中。针对以下需求开发存储添加剂的潜力 在没有氧气的情况下储存的红细胞的特定代谢需要从丰富的 用于测试商业化低氧储存的数据。这种添加剂有望进一步 改善RBC储存质量并促进动物模型中的输血结果。为了发展 这种添加剂和测试缺氧红细胞储存在这种新的添加剂的优越性，提出的项目 结合Hemanext公司10多年来在低氧红细胞储存方面的研究和开发工作， 平台（部分由SBIR第一阶段，第二阶段和IIB赠款资助），以及Omix Technologies广泛发布的 在体内和血库储存期间对RBC代谢起作用。 该第二阶段提案的三个目标是：首先，利用创新的高通量 代谢组学工具，以优化来自50岁以上候选人的五种低氧添加剂溶液的配方 添加剂配方之前在常氧储存下测试。还将添加其它制剂。 根据缺氧条件下RBC代谢的见解设计的 在过去四年的合作中收集到的。第二，扩大发展 在目标1中开发的最佳性能添加剂配方，以确定受控的储存质量 通过溶血和输血后24小时的评价， RBC储存结束时的回收率研究。第三，进一步评估顶部的潜在功效 在啮齿动物低血容量性休克和复苏模型中的候选添加剂溶液。 !

The objective of this project is to develop an additive solution optimized for red blood cells (RBCs) stored under hypoxic environment, with the goal of producing highest quality RBCs by minimizing storage- associated damage (storage lesion). The additive solution developed in this project will be commercialized as a part of the Hemanext hypoxic storage platform. The proposal builds on the strong preliminary data showing that hypoxic storage of RBC (i) decreases oxidant stress and improves energy metabolism through mechanisms of intracellular alkalinization and concomitant removal of oxygen, a rate-limiting substrate for pro-oxidant reactions; (ii) promotes energy metabolism by preventing the oxidation of functional residues in key enzymes such as glyceraldehyde 3-phosphate dehydrogenase; (iii) significantly outperforms control RBCs with respect to the two FDA gold standard to determine storage quality, hemolysis and post-transfusion recovery; (iv) improves resuscitation (superior microvascular perfusion and oxygen delivery) in hemorrhaged rats, at significant lower doses than control RBCs and performing comparably to fresh RBCs even when end of storage hypoxic RBCs are transfused. In addition, hypoxic RBC reduces variability of quality present in the current products, while also reducing agents implicated in adverse events in the recipients. The potential for the development of storage additives tailored towards the specific metabolic needs of RBCs stored in the absence of oxygen became apparent from the wealth of data generated to test hypoxic storage for commercialization. Such an additive is expected to further improve RBC storage quality and promote transfusion outcomes in animal models. In order to develop such an additive and test the superiority of hypoxic RBCs stored in this new additive, the proposed project combines Hemanext’s extensive work over 10 years of research and development of hypoxic RBC storage platform (in part funded by SBIR Phase I, II and IIB grants), and Omix Technologies’ extensive published works on RBC metabolism in vivo and during blood bank storage. The three aims of this Phase II proposal are: First, to exploit innovative high-throughput metabolomics tools to optimize the formulation of five hypoxic additive solutions from candidates of 50+ additive formulations previously tested under normoxic storage. Additional formulations will be also examined that have been designed according to insights from RBC metabolism under hypoxic condition gathered from collaborative work over the past four years. Second, to scale up the development of the top performing additive formulation developed in aim 1, in order to determine storage quality under control and hypoxic storage in the new additive through the evaluation of hemolysis and 24-hour post-transfusion recovery studies in end of storage RBCs. Third, to further evaluate the potential efficacy of the top candidate additive solutions in a rodent model of hypovolemic shock and resuscitation. !