Hematology Genetics
Analysis of phenotypes of Hb J-Bangkok and concomitant thalassemia
Li Yumin, Cai Qinquan, Jin Xiao, Qin Junlong, Chen Yaqiong, Li Rui, Mo Yunjun, Zhang Xiuming
Published 2021-01-10
Cite as Chin J Med Genet, 2021, 38(1): 7-11. DOI: 10.3760/cma.j.cn511374-20191031-00550
Abstract
ObjectiveTo analyze the hematological phenotypes of Hb J-Bangkok and concomitant thalassemia.
MethodsIn total 72 397 samples were screened by using capillary electrophoresis. Samples with Hb J-Bangkok were identified by DNA sequencing and analysis of red blood cell parameters. Gap-PCR and PCR-reverse dot blotting (PCR-RDB) were used for analyzing the thalassemia genes.
ResultsThirty one cases of Hb J-Bangkok were identified, all of which were heterozygotes. The hematological phenotype index (Hb, mean corpuscular volume, mean corpuscular hemoglobin, Hb J-Bangkok, Hb A2) for male carriers of Hb J-Bangkok were (158±13.0) g/L, (90.1±2.3) fL, (31.1±2.5) pg, (51.3±0.7)% and (2.5±0.1)%, those for female carriers were (124±9.3) g/L, (93.3±4.9) fL, (31.1±1.6) pg, (50.9±1.1)% and (2.6±0.2)%, those for Hb J-Bangkok and an α 3.7 deletion were 124 g/L, 82.1 fL, 26.1 pg, 49.4% and 2.4%, those for Hb J-Bangkok and --SEA deletion were (120±14.1) g/L, (67.7±5.7) fL, (20.5±2.6) pg, (50.1±1.9)% and (2.1±0.4)%, and those for Hb J-Bangkok and β-thalassemia-related variants were (134±11.3) g/L, (71.6±0.9) fL, (21.7±1.0) pg, (92.7±0.6)%, (5.5±0.8)%. No Hb A was found among the Hb J-Bangkok and concomitant β-thalassemia carriers.
ConclusionHb J-Bangkok heterozygotes have normal hematological phenotypes, though they may show different hematological characteristics when concomitant with different types of thalassemia, for which genetic counseling should be provided accordingly.
Key words:
Abnormal hemoglobin; Hb J-Bangkok; Thalassemia; Phenotype
Contributor Information
Li Yumin
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Cai Qinquan
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Jin Xiao
Department of Hospital Infection-Control, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Qin Junlong
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Chen Yaqiong
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Li Rui
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Mo Yunjun
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China
Zhang Xiuming
Department of Laboratory Medicine, Luohu District People’s Hospital, Shenzhen, Guangdong 518001, China