Development of heparan sulfate-based therapeutics to treat inflammatory diseases

摘要 SBIR第一阶段项目的目标是完成更大规模的合成， 抗炎药硫酸乙酰肝素的药代动力学研究 低聚糖。18-mer在腹膜炎的鼠疾病模型中减少中性粒细胞浸润， 肝缺血/再灌注损伤和对乙酰氨基酚诱导的急性肝衰竭（APAP诱导的 ALF）。18-mer靶向高迁移率族蛋白1（HMGB 1）蛋白并减弱HMGB 1- 介导的炎症，其特征在于中性粒细胞浸润到损伤部位。除了 在这些疾病模型中，HMGB 1参与了众多的局部和全身炎症反应 疾病包括败血症和创伤损伤。目前，还没有批准的治疗方法 靶向HMGB 1介导的炎症 这项工作的重点是开发18-mer作为APAP诱导的ALF的治疗剂。信心 在APAP中使用其他寡糖进行筛选实验， 与18-mer相比无效并证明18-mer的抗炎作用的模型 影响是多种炎症小鼠模型。此SBIR第一阶段应用程序包含两个 明确的目标。在目标1中，我们计划将合成规模增加到10 g，约增加30倍 目前的生产规模。改进的合成将使用12-mer中间体作为 原料，将合成步骤从36步缩短到16步。目标2是开发一种LC- 基于MS/MS的方法定量血液和尿液中的18-mer。这种方法可以让我们 在后续临床前开发中获得药代动力学参数。II期 研究，我们将重点关注将规模放大合成增加到100 g，IND使能研究和 寡糖的组织分布。该项目的成功将提供一个新的 通过靶向HMGB 1介导的炎症来治疗药物诱导的肝毒性的方法。

Abstract The goal of this SBIR phase I project is aimed at completing a larger synthesis scale and pharmacokinetic studies for 18-mer, a lead candidate anti-inflammatory heparan sulfate oligosaccharide. 18-mer decreased neutrophil infiltration in murine diseases model of peritonitis, liver ischemia/reperfusion injury, and acetaminophen-induced acute liver failure (APAP-induced ALF). 18-mer targets to high mobility group box 1 (HMGB1) protein and attenuates HMGB1- mediated inflammation characterized by neutrophil infiltration to the injury site. In addition to these disease models, HMGB1 is involved a numerous local and systemic inflammation disorders including sepsis and trauma injury. Currently, there are no approved therapeutics targeting HMGB1-mediated inflammation. This work is focused on developing 18-mer as a therapeutic for APAP-induced ALF. Confidence to pursue 18-mer stems from screening experiments using other oligosaccharides in the APAP model that were ineffective compared to 18-mer and demonstrating 18-mer’s anti-inflammatory effect is multiple inflammatory mouse models. This SBIR phase I application contains two specific aims. In Aim 1, we plan to increase the synthetic scale to 10 g, about 30-fold increase from the current production scale. The improved synthesis will use a 12-mer intermediate as the starting material, shortening the synthetic steps to 16 from 36. Aim 2 is to develop a LC- MS/MS based method to quantify the 18-mer in blood and urine. This method will allow us to obtain pharmacokinetic parameters in the subsequent preclinical development. In the phase II studies, we will focus on increasing the scale-up synthesis to 100g, IND-enabling studies and tissue distribution of the oligosaccharides. The success of this project will provide a new approach to treat drug induced liver toxicity by targeting to HMGB1-mediated inflammation.