识别血红蛋白清除器受体的鉴定
M Kristiansen1, J H Graversen, C Jacobsen
1Department of Medical Biochemistry, University of Aarhus, Denmark.
Nature
|February 24, 2001
概括
拾尸体受体CD163结合并内化哈普托格洛宾-血红蛋白复合体,这是血管内血解过程中清除血红蛋白的关键过程. 这一发现为血液溶解调节和潜在的治疗点提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 血液学 血液学 血液学
背景情况:
- 血管内血解,在状细胞疾病等疾病中的一个过程,释放出血红蛋白进入血.
- 哈普特蛋白与自由血红蛋白结合,但在加速血解过程中被耗尽.
- 清除哈普托格洛宾-血红蛋白复合物的机制以前尚不清楚.
研究的目的:
- 为了确定负责清理哈普托格洛宾-血红蛋白复合体的受体.
- 描述已识别的受体及其连接体之间的相互作用.
主要方法:
- 蛋白质的识别和表征.
- 基于细胞的检测用于内分细胞和受体结合.
- 用CD163互补DNA感染细胞.
- 在骨髓单细胞淋巴瘤细胞中分析CD163表达.
主要成果:
- 鉴定出CD163是结合哈普托格洛宾-血红蛋白复合体的受体.
- CD163调解了这些复合体的内细胞分裂.
- 相互作用是Ca2+依赖的,具有高亲和力,并且特定于复杂的,而不是单个成分.
- 多重复合的哈普托格洛宾复合体表现出比二次复合体更高的亲和力.
结论:
- CD163的功能是作为一个吸收器受体的哈普托格洛宾-血红蛋白复合体.
- 这一途径对于在血管内血液溶解过程中调节血红蛋白水平至关重要.
- CD163代表了理解和潜在治疗血液溶解障碍的新目标.
相关概念视频
Blood Types
Human blood is classified into different types based on the presence of antigens on the red blood cell's surface and antibodies in the plasma. Proper identification of blood type is essential for successful blood transfusion. The International Society of Blood Transfusion has identified 38 human blood types based on the surface antigens on the red blood cells. The most common types are ABO, Rh, and MNS blood types.
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
Erythropoiesis
Red blood cells (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia, and...
Hemoglobin
Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
Rh Blood Group
The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
Blood Typing
Understanding an individual's blood group is a critical component of transfusion medicine. It ensures compatibility in blood transfusions, organ transplants, and even during pregnancy. Determining these blood groups involves the ABO and Rh blood typing systems, utilizing specific antigens and corresponding anti-sera to identify an individual's blood type.
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...
Blood Transfusion
Blood transfusion is a critical medical procedure that saves lives and treats various medical conditions. It involves transferring blood from a donor to a recipient. This process requires a thorough understanding of the ABO blood group system and its associated antigens and antibodies.
Blood Transfusion Overview
A blood transfusion is a medical procedure used to replace blood lost due to injury, surgery, or to treat conditions such as anemia or cancer. During a transfusion, donor blood is...
Blood Transfusion Overview
A blood transfusion is a medical procedure used to replace blood lost due to injury, surgery, or to treat conditions such as anemia or cancer. During a transfusion, donor blood is...


