[由HBA2:c.2T>C和HBA2:c.2delT突变引起的血红蛋白H疾病病例分析]
Qiu-Hua Wang1, Xing-Yuan Chen2, Ning Tang1
1Department of Medical Genetics, Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Maternity and Child Healthcare Hospital, Liuzhou 545001, Guangxi Zhuang Autonomous Region, China.
在HBA2基因中罕见的启动密码子突变,特别是HBA2:c.2T>C和HBA2:c.2delT,可以导致α-thalassemia. 当与东南亚删除相结合时,这些突变会导致血红蛋白H疾病,为遗传咨询提供信息.
科学领域:
- 遗传学 遗传学 是一个
- 血液学 血液学 血液学
- 分子生物学分子生物学
背景情况:
- 阿尔法thalassemia是一种常见的遗传性血液疾病,由阿尔法环球蛋白链的合成减少或不存在引起.
- 在HBA2基因的启动密码子突变是罕见的,但可以显著影响全球蛋白的生产.
- 东南亚删除 (--SEA) 是东南亚普遍存在的一种常见的alpha-thalassemia删除.
研究的目的:
- 调查HBA2基因中两种罕见的启动密码子突变 (HBA2:c.2T>C和HBA2:c.2delT) 的情况.
- 分析这些突变与东南亚删除对临床表型的联合影响.
- 为了了解这些特定的α-thalassemia突变的家族中的基因型-表型关系.
主要方法:
- 从家庭成员收集了周围血液样本进行分析.
- 进行了标准血细胞计数和毛细血管电泳血红蛋白分析.
- 差距PCR和反向点抹 (RDB) 用于检测常见的α-thalassemia突变.
- 桑格测序用于分析HBA1和HBA2基因序列.
主要成果:
- 两个探针被确定为具有基因型的 - - SEA/αα携带HBA2:c.2T>C和 - - SEA/αα携带HBA2:c.2delT.
- 家庭成员表现出HBA2:c.2T>C/WT和HBA2:c.2delT/WT的异构基因型.
- 所有受影响的个体都呈现出微细胞性低染色贫血,这是阿尔法thalassemia的一个特征.
结论:
- 异构HBA2:c.2T>C和HBA2:c.2delT突变可以导致静态的α-thalassemia表型.
- 当这些突变与轻度的α-thalassemia相结合时,例如东南亚删除,它们可以导致血红蛋白H疾病的临床表现.
- 这些发现为受这些罕见的α-thalassemia突变影响的家庭提供了准确的遗传咨询和诊断的基础.
更多相关视频
11:59Detection of Residual Donor Erythroid Progenitor Cells after Hematopoietic Stem Cell Transplantation for Patients with Hemoglobinopathies
Published on: September 6, 2017
03:45Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
相关概念视频
Multiple Allele Traits
Genetic Lingo
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...
Gene Families
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Blood Types
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
