Acute hepatic failure (AHF), called as fulminant hepatic failure, is a severe liver injury which caused multiorgan failure with an extremely high mortality rate (60-70%). the basic etiopathogenic agent of AHF was viral hepatitis (80%) in China. Liver transplantation has been shown to be the most effective therapy. The drugs, blood exchange or bio-artificial liver assist devices is used to inhibit hepatocytes apoptosis and improve hepatocytes proliferation,but no effects on patients survival. In the recent, no drugs were found in curing AHF. Our lab has found that interleukin-1 receptor antagonist (IL-1Ra) could protect hepatocyte in AHF model mouse. According to research progress of IL-1Ra function in AHF, We have a hypothesis which IL-1 signal pathway is a target in curing AHF, and start to study preclinical pharmacodynamics of IL-1Ra treating AHF on different models. Another side, we will investigate whether IL-1Ra regulate hepatocytes survival depending on IL-1R-MyD88 pathway in AHF. This research should be helpful to find new recombinant protein drug whose intellectual property will be owned. There is big value to society in our country.
重症肝炎,又称为急性肝衰,其临床表现特点是发病急,病程短,预后差,死亡率高(60%-70%)。在我国,重症肝炎的病因主要是病毒性肝炎,约占80%。在对重症肝炎的治疗方面,最佳临床治疗方案是肝移植,除此之外,采用药物、血浆置换和人工肝支持系统等辅助治疗来抑制肝细胞凋亡和促进肝细胞增殖。但到目前为止,尚未找到治疗重症肝炎的有效药物。本实验室通对急性肝衰的前期研究发现白细胞介素1受体拮抗剂(IL-1Ra)对重症肝炎模型动物具有良好的保护作用。结合国内外的研究进展,我们提出IL-1信号通路是重症肝炎的重要治疗靶点,并应用不同重症肝炎动物模型来开展IL-1Ra治疗重症肝炎的的临床前药效学研究,同时研究IL-1Ra通过IL-1R/MyD88信号通路抑制肝细胞凋亡的作用机制。这有助于发现治疗重症肝炎的新型重组蛋白类药物,形成拥有自主知识产权的新药,具有显著的社会效益和意义。
本课题以D-氨基半乳糖氨(D-GalN)/细菌脂多糖(LPS)联合诱导小鼠重症肝衰模型和伴刀豆蛋白(ConA)诱导小鼠免疫性急性肝炎模型对IL-1RA治疗重症肝衰的效果进行了评价,研究结果表明IL-1RA可以有效的提高D-GalN/LPS诱导重症肝衰小鼠生存率(IL-1Ra vs 对照,80% vs20%),IL-1RA也可以显著提高ConA诱导小鼠急性免疫性肝炎小鼠的生存率(IL-1Ra vs 对照,90% vs10%),在两种肝炎小鼠中,IL-1RA都显著地降低循环中谷丙转氨酶(ALT)和谷草转氨酶(AST)水平。对IL-1RA治疗小鼠重症肝炎的机制研究揭示IL-1RA可以有效降低肝脏内重要炎症通路中重要调控蛋白MYD88的表达,抑制细胞中应激反应调控蛋白ERK的快速活化,同时降低了模型小鼠肝脏内caspase3,8,9的活性。通过细胞实验证明阻断ERK或MYD88的可以有效提高IL-1RA抑制炎症因子(TNFα、IL-1β)诱导原代肝细胞的凋亡。
{{i.achievement_title}}
数据更新时间:2023-05-31
DeoR家族转录因子PsrB调控黏质沙雷氏菌合成灵菌红素
Intensive photocatalytic activity enhancement of Bi5O7I via coupling with band structure and content adjustable BiOBrxI1-x
Asymmetric Synthesis of (S)-14-Methyl-1-octadecene, the Sex Pheromone of the Peach Leafminer Moth
七羟基异黄酮通过 Id1 影响结直肠癌细胞增殖
Sparse Coding Algorithm with Negentropy and Weighted ℓ1-Norm for Signal Reconstruction
重组人白细胞介素-1受体拮抗剂预防化疗后骨髓损伤的药效学研究
重组人白介素1受体拮抗剂预防化疗相关性腹泻的药理机制研究
微生物来源白细胞介素1受体拮抗剂筛选模型的研究
白细胞介素1受体拮抗剂纳米缓释粒子联合自体骨髓间充质干细胞移植治疗肝功能衰竭的实验研究