灵感来自古生物的脱氧核糖酶I脂质体可以在败血症中预防多个器官功能障碍
概括
一种新的药物递送系统,DNase I/Rm-Lipo,在败血症中有效降解中性粒细胞外细胞陷 (NETs) 和无细胞DNA (cfDNA). 在临床前模型中,这种治疗减少了炎症并防止了器官损伤,提供了一个有前途的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 纳米医学是一种纳米医学.
- 败血症病理生理学病理生理学
背景情况:
- 中性细胞细胞外陷 (NETs) 和循环的无细胞DNA (cfDNA) 显著导致败血症引起的炎症和器官损伤.
- 脱氧核糖核酶I (DNase I) 的治疗效用受到其短 in vivo 半衰期和快速降解的限制.
研究的目的:
- 开发和评估DNase I的新型系统性药物递送系统,以克服其在败血症中的治疗局限性.
- 评估甲基分支脂质体与红细胞膜融合,用于DNase I输送 (DNase I/Rm-Lipo) 的有效性,以减轻败血症进展.
主要方法:
- 开发DNase I/Rm-Lipo,这是一个设计用于增强DNase I传递的纳米载体系统.
- 在刺激免疫细胞中DNase I/Rm-Lipo的体外评估,以评估NETs和cfDNA清除.
- 在鼠类败血症模型中进行体内评估,以评估对炎症,免疫细胞激活和器官功能的治疗作用.
主要成果:
- 在实验室中,DNase I/Rm-Lipo证明有效地从激活的中性粒细胞中去除NET和cfDNA.
- 纳米载体系统表现出延长的循环时间,并在体内有效抑制中性粒细胞激活.
- 在败血症小鼠中,DNase I/Rm-Lipo治疗调节了巨细胞两极分化,减少了全身炎症,并预防了器官功能障碍.
结论:
- DNase I/Rm-Lipo代表了一种有前途的纳米医学方法,用于针对性降解败血症中的NET和cfDNA.
- 这种新型的输送系统具有显著的治疗潜力,可以通过减轻过度炎症和预防器官损伤来控制败血症.
相关概念视频
Tissue Renewal without Stem Cells
After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
However, failure of such a system...
iPS Cell Differentiation
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
Pathophysiology of Diabetes
Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...
Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
Diabetic Retinopathy
DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
Diabetic Neuropathy
DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...


