在HLA I类缺乏症中发生同胞性人类TAP转运器突变
H de la Salle1, D Hanau, D Fricker
1Laboratoire d'Histocompatibilité, Centre Régional de Transfusion Sanguine, Strasbourg, France.
Science (New York, N.Y.)
|July 8, 1994
概括
与抗原处理 (TAP) 蛋白相关的载体遗传缺陷会损害人类白细胞抗原 (HLA) I类表达,导致复发性感染和改变的T细胞群. 这会影响自然杀手细胞细胞毒性和适应性免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 人类白细胞抗原 (HLA) I类表达对适应性免疫非常重要.
- I类HLA分子向T细胞呈现,这一过程依赖于与抗原处理 (TAP) 相关的载体.
- 在TAP的缺陷可以导致免疫系统功能障碍.
研究的目的:
- 调查与抗原处理 (TAP) 缺陷相关的遗传载体的免疫后果.
- 描述TAP缺乏症患者免疫细胞的特征和功能.
主要方法:
- 对细胞表面蛋白质表达的分析 (HLA类I,CD1a).
- 自然杀手 (NK) 细胞细胞毒性的评估.
- 流细胞计量用于量化T细胞子集 (CD8+αβT细胞,CD4+CD8+T细胞,玛三角T细胞).
主要成果:
- 观察到人类白细胞抗原 (HLA) I 类蛋白质的细胞表面表达严重减少.
- 正常的CD1a表达和受影响的自然杀手 (NK) 细胞细胞毒性.
- 检测到低但显著数量的细胞毒性CD8+αβT细胞.
- 在最受影响的兄弟姐妹中增加了CD4+CD8+和玛三角T细胞.
结论:
- 与抗原处理 (TAP) 缺陷相关的遗传载体严重影响人类白细胞抗原 (HLA) I 类表现.
- TAP缺乏导致反复出现的细菌感染和改变的T细胞平衡.
- 这项研究强调了TAP在适应性和先天性免疫力中的关键作用.
相关概念视频
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:27Glucose Transporters
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:27Pharmacogenetics of Phase II Enzymes: N-acetyltransferase, Thiopurine S-methyltransferase, UDP-glucuronosyltransferase
Phase II biotransformation reactions are essential for detoxifying and eliminating xenobiotics, including many pharmaceutical compounds. These reactions typically involve conjugation, the covalent attachment of polar endogenous groups such as glucuronic acid, sulfate, methyl, or acetyl moieties to functional groups introduced during Phase I metabolism. The resulting conjugates are more water-soluble, enabling efficient renal or biliary excretion.The major classes of Phase II enzymes include...
01:16Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters
The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...
01:11Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...