导致G6PD缺乏症的遗传变异:临床和生化数据支持新的世卫组织分类
Caterina Nannelli1,2, Andrea Bosman3, Jane Cunningham3
1University of Florence, Florence, Italy.
British journal of haematology
|July 7, 2023
概括
葡萄糖-6-酸盐脱酶 (G6PD) 缺乏是常见的,但严重的慢性贫血是罕见的. 大多数G6PD缺乏的男性的残留酶活性低于30%,这解释了为什么严重的贫血不常见.
科学领域:
- 遗传学 遗传学 是一个
- 血液学 血液学 血液学
- 生物化学 生物化学
背景情况:
- 葡萄糖-6-酸脱酶 (G6PD) 缺乏症是一种X系遗传疾病,在许多人群中普遍存在,影响红细胞.
- 这种缺陷在暴露于某些触发因素 (如豆类或药物) 时会导致急性血液溶解性贫血,并且是新生儿黄的危险因素.
- 世界卫生组织 (WHO) 建议进行G6PD测试,以指导使用8-氨基基诺林来预防Plasmodium vivax疟疾复发.
研究的目的:
- 为了分析常见的G6PD缺陷变体的男性残留G6PD酶活性.
- 为确定16种常见变异的G6PD活性可靠估计.
- 调查G6PD活性,基质亲和力和CNSHA风险之间的关系.
主要方法:
- 进行了一项文献综述,从2291名男性中收集G6PD活性值.
- 分析了研究聚焦于多态G6PD变体的数据.
- 对于常见变异,估计了红细胞残留G6PD活性和基质亲和力 (Km G6P).
主要成果:
- 对16种常见变异的平均残留红细胞G6PD活性估计为1.9%至33%.
- 在各种数据集中,大多数G6PD缺陷男性的酶活性低于正常水平的30%.
- 观察到残留G6PD活性和基质亲和力 (Km G6P) 之间存在直接关系.
结论:
- 这项研究提供了可靠的估计平均残留G6PD活动在常见变体,临床管理和遗传咨询至关重要.
- 这些发现表明,多态G6PD变体的生物化学特性,特别是它们的基质亲和力,在预防严重的慢性血液溶解性贫血方面发挥着作用.
- 巩固基于活动重叠的G6PD缺陷分类可以简化诊断和治疗策略,特别是在疟疾流行地区.
更多相关视频
09:34Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
33.8K
09:37Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
Published on: August 15, 2019
9.8K
相关概念视频
Incomplete Dominance
22.9K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.9K
Genome-wide Association Studies-GWAS
13.6K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.6K
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
Translation
15.0K
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
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
15.0K
Genetic Lingo
103.3K
Overview
103.3K
Genetic Variation
329
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
329
