错误的F9变体热点与高质量蛋白质缺陷相关,导致B型血友病
Tirsa T van Duijl1,2, Samantha Gouw2, Ina Kronevska1
1Department of Bleeding and Hemostasis, Sanquin Research, Amsterdam, The Netherlands.
Blood vessels, thrombosis & hemostasis
|December 8, 2025
概括
在F9的遗传变异导致血友病B.从这些变异的质量缺陷可以干扰因子IX替代疗法,影响治疗的有效性和出血的表型.
科学领域:
- 血液学 血液学 血液学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- 血友病B是由F9基因变异引起的,导致因子IX (FIX) 缺乏.
- 虽然定量FIX缺陷是可以治疗的,但定性缺陷会导致功能障碍的FIX蛋白质,可能会阻碍复合FIX (rFIX) 疗法.
- 了解这些定性缺陷对于改善B型血友病患者治疗结果至关重要.
研究的目的:
- 为了识别与定性血友病B缺陷相关的F9误解变异.
- 研究功能失调的FIX蛋白质形式对血栓生成和治疗反应的影响.
- 为了将基因型与蛋白型相关联,以获得个性化的血友病B护理.
主要方法:
- 综合基因型和表型数据来自欧洲血友病和相关疾病协会F9凝血因子变异数据库.
- 分析了663名患者的活性 (FIX:Act) 和抗原 (FIX:Ag) 水平,这些患者患有不同程度的B型血友病.
- 研究了使用患者血补充rFIX缩剂,绕过剂或埃米齐祖马布的活体血栓生成.
主要成果:
- 大约40-50%的B型血友病患者表现出交叉反应物质 (FIX:Ag ≥40%),表明了质性缺陷.
- 与质量缺陷相关的变种在FIX加工场所发现,外石II和结合残留物.
- 活体监测显示,尽管进行了预防,但在具有未知意义变异的患者中,凝血开始的正常化有限.
结论:
- 基因型-原型对齐可以解释血友病B表型异质性和治疗变异性.
- 识别导致定性缺陷的变体是实现个性化血友病B管理的关键一步.
- 对功能失调的FIX蛋白质形式的进一步研究将加强对B型血友病的治疗策略.
相关概念视频
Alternative RNA Splicing
24.6K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
24.6K
Point and Frameshift Mutations
780
Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
780
Translation
155.0K
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...
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...
155.0K
Translation
17.4K
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...
17.4K
Mutations
94.3K
Overview
94.3K
Genome-wide Association Studies-GWAS
15.2K
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...
15.2K


