1
|
Su Q, Chen S, Wu L, Tian R, Yang X, Huang X, Chen Y, Peng Z, Chen J. Severe Thalassemia Caused by Hb Zunyi [β147(HC3)Stop→Gln; HBB: c.442T>C)] on the β-Globin Gene. Hemoglobin 2019; 43:7-11. [PMID: 31084366 DOI: 10.1080/03630269.2019.1582430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Hemoglobinopathies are caused by genetic defects on the globin genes. To date, more than 900 β-globin variants have been recorded worldwide. These gene alterations often cause either a decrease in β-globin synthesis or completely block synthesis, leading to a hemoglobinopathy. While most of these causative mutations are inherited, de novo mutations are quite rare. Here, we investigated three hemoglobinopathy cases. These patients developed severe hemolytic anemia at 3-5 months of age and were transfusion-dependent. In patient 1, a novel β variant, Hb Zunyi [β147(HC3)Stop→Gln; HBB: c.442T>C] was identified. This de novo mutation results in a stop codon substitution to a glutamine residue at codon 147 of the β-globin gene, and leads to severe thalassemia. In patient 2, we discovered the rare Hb Southampton mutation [β106(G8)Leu→Pro; HBB: c.320T>C], while in patient 3, the rare Hb Alesha mutation [β67(E11)Val→Met (GTG>ATG); HBB: c.202G>A] was detected. The identification of the novel β variant, Hb Zunyi, has added to the human globin database and will shed light on future diagnosis of hemoglobinopathy/thalassemia and genetic counseling.
Collapse
Affiliation(s)
- Qiong Su
- a The Second Department of Pediatrics , Affiliated Hospital of Zunyi Medical University , Zunyi , GuiZhou Province , People's Republic of China.,e Zunyi Medical and Pharmaceutical College , Zunyi , GuiZhou Province , People's Republic of China
| | - Shiping Chen
- b Beijing Genomics Institute (BGI) Shenzhen , Shenzhen , Guangdong Province , People's Republic of China
| | - Liusong Wu
- a The Second Department of Pediatrics , Affiliated Hospital of Zunyi Medical University , Zunyi , GuiZhou Province , People's Republic of China
| | - Runmei Tian
- a The Second Department of Pediatrics , Affiliated Hospital of Zunyi Medical University , Zunyi , GuiZhou Province , People's Republic of China
| | - Xiaoqin Yang
- b Beijing Genomics Institute (BGI) Shenzhen , Shenzhen , Guangdong Province , People's Republic of China
| | - Xiaoyan Huang
- b Beijing Genomics Institute (BGI) Shenzhen , Shenzhen , Guangdong Province , People's Republic of China
| | - Yan Chen
- a The Second Department of Pediatrics , Affiliated Hospital of Zunyi Medical University , Zunyi , GuiZhou Province , People's Republic of China
| | - Zhiyu Peng
- b Beijing Genomics Institute (BGI) Shenzhen , Shenzhen , Guangdong Province , People's Republic of China
| | - Jindong Chen
- c Department of Urology , University of Rochester Medical Center , Rochester , NY USA.,d Department of Medical Genetics , Zunyi Medical University , Zunyi , GuiZhou Province , People's Republic of China
| |
Collapse
|