Hemoglobin E syndromes in Pakistani population

BMC Hematology

Tariq Moatter¹  Anila Rashid¹  Amna Nasir¹  Mashhooda Rasool Hashmi¹  Bushra Moiz¹ 

[1] Department of Pathology and Microbiology, The Aga Khan University Hospital, Stadium road, Karachi 74800, Pakistan

关键词: Pakistan;    Hemoglobin variants;    Hemoglobin E;   

Others  :  865402
DOI  :  10.1186/1471-2326-12-3

 received in 2011-05-27, accepted in 2012-03-25,  发布年份 2012

【 摘 要 】

Background

Hemoglobin E is an important hemoglobin variant with a worldwide distribution. A number of hemoglobinopathies have been reported from Pakistan. However a comprehensive description of hemoglobin E syndromes for the country was never made. This study aimed to describe various hemoglobin E disorders based on hematological parameters and chromatography. The sub-aim was to characterize hemoglobin E at molecular level.

Methods

This was a hospital based study conducted prospectively for a period of one year extending from January 1 to December 31, 2008. EDTA blood samples were analyzed for completed blood counts and hemoglobin variants through automated hematology analyzer and Bio-Rad beta thalassaemia short program respectively. Six samples were randomly selected to characterize HbE at molecular level through RFLP-PCR utilizing MnlI restriction enzyme.

Results

During the study period, 11403 chromatograms were analyzed and Hb E was detected in 41 (or 0.36%) samples. Different hemoglobin E syndromes identified were HbEA (n = 20 or 49%), HbE/β-thalassemia (n = 14 or 34%), HbEE (n = 6 or 15%) and HbE/HbS (n = 1 or 2%). Compound heterozygosity for HbE and beta thalassaemia was found to be the most severely affected phenotype. RFLP-PCR utilizing MnlI successfully characterized HbE at molecular level in six randomly selected samples.

Conclusions

Various HbE phenotypes are prevalent in Pakistan with HbEA and HbE/β thalassaemia representing the most common syndromes. Chromatography cannot only successfully identify hemoglobin E but also assist in further characterization into its phenotype including compound heterozygosity. Definitive diagnosis of HbE can easily be achieved through RFLP-PCR.

【 授权许可】

   
2012 Moiz et al; licensee BioMed Central Ltd.

【 图 表 】

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