四个拼接位变异的功能分析,包括一个新变异,对抗原表达和ABO亚群形成的功能分析
Huayue Yang1, Dan Long2, Hang Lei1
1Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Blood Transfusion, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
在ABO基因中的拼接位变异可以改变红细胞抗原表达. 这项研究揭示了特定变异如何影响ABO糖系转移酶生物合成,导致A或B抗原表型减弱.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 在ABO基因中的Splice-site变异可以破坏ABO糖系转移酶生物合成.
- 这种干扰导致红细胞上A或B抗原的表达减少,导致弱抗原表型.
研究的目的:
- 描述四种特定的内核6拼接位变异 (三种在A1等位基因中,一种在ABO*B.01等位基因中) 对ABO前mRNA拼接的影响.
- 为这些 ABO 变体建立基因型-拼接-表型关联模型.
主要方法:
- 血清学和分子遗传分析.
- 结合部位识别的生物信息预测.
- 迷你基因测试用于评估拼接效率.
- 定量实时PCR测量转录水平.
主要成果:
- 这四种变体都影响了5'拼接部位的识别,减少了功能性 ABO 转录.
- 一个等位基因变异 (c.374+5G>A,c.374+4A>G,c.374+4A>T) 的结果是2.8%到10.2%的6号外显子保留.
- B等位基因变异 (c.374+2_374+3insT) 保留了4.7%的外显子6转录,允许痕迹B糖转移酶表达.
- 在ABel亚型个体中,转录水平为对照组的51.7%.
结论:
- 在ABO基因中的拼接位变异通过改变的转录调节来减少功能转录的丰富性.
- 这导致ABO糖系转移酶表达的减少和可变的弱抗原表型.
- 这项研究提供了一种基因型-拼接-表型模型,以了解 ABO 血型变异.
更多相关视频
07:26High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
Published on: July 18, 2017
07:31ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
Published on: June 30, 2022
相关概念视频
Blood Types
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
The ABO Blood Group
Antigens in the ABO Blood Group System
Antigens are substances that can trigger an immune response, leading to the production of antibodies. In the ABO blood group system,...
Diversity of Antigen Receptors
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
RNA Splicing
Blood Typing
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target...
Antigen Processing Pathways
MHC Class I: Presenting Endogenous...
