相关实验视频
Updated: Jul 14, 2026

06:37
Staphylococcus aureus Growth using Human Hemoglobin as an Iron Source
Published on: February 7, 2013
一种人类复合血红蛋白,旨在作为血液替代品使用
D Looker1, D Abbott-Brown, P Cozart
1Somatogen Inc., Boulder, Colorado 80301.
Nature
|March 19, 1992
概括
开发一种安全的血液替代品至关重要. 这项研究设计了一种新型的人类血红蛋白,具有降低的氧 afinity 和增强的稳定性,克服了先前尝试的局限性,并防止损伤.
科学领域:
- 生物化学 生物化学
- 生物技术是生物技术.
- 血液学 血液学 血液学
背景情况:
- 迫切需要血液替代品,因为担心血液传播的病原体.
- 现有的无细胞血红蛋白溶液面临氧气卸载和毒性的挑战.
- 在大肠杆菌和大肠杆菌中合成的血红蛋白也表现出局限性.
研究的目的:
- 为了设计一种新的人类血红蛋白,提高氧气承载能力和降低毒性,用于作为血液替代品.
- 为了解决以前基于血红蛋白的氧载体的高氧亲和度和快速清问题.
- 开发一种稳定的血红蛋白分子,防止分裂成有毒的二元体.
主要方法:
- 利用表达向量来产生人体血红蛋白.
- 包含一个编码突变β-环球因子的基因,具有降低氧 afinity.
- 包括一个重复的,协同融合的α-globin基因来增强稳定性.
- 研究了工程血红蛋白的体内半衰期和清除.
主要成果:
- 成功产生了人类血红蛋白,氧 afinity 降低.
- 融合的α-环球蛋白子单元阻止了分裂成αβ二元体.
- 工程化血红蛋白在体内表现出更长的半衰期.
- 观察到与血红蛋白解离相关的毒性消除.
结论:
- 工程人类血红蛋白有效地解决了以前的血液替代品候选人的局限性.
- 这种新型的血红蛋白表现出较低的氧 afinity 和增强的稳定性,使其成为一个有前途的血液替代品.
- 预防二元解离减轻脏毒性,为氧气输送提供更安全的替代方案.
更多相关视频
11:31Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols
Published on: January 2, 2013
09:47Exploring Alternative Perfusion Solutions Using Next-Generation Polymerized Hemoglobin-Based Oxygen Carriers in a Model of Rat Ex Vivo Lung Perfusion
Published on: June 14, 2024
相关概念视频
Recombinant DNA
Overview
Gene Families
Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Blood Transfusion and Agglutination
Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
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...
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...
Oxygen Transport in the Blood
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...