title: A FACS Based Case Study on Two HbE-β Thalassaemia Members of a Family, Having Similar Mutational Background.
abstract: In this report we have tried to explain the reasons behind the difference in the pattern of transfusion requirement between two members of a family with similar β-globin mutation. The father and younger son both are HbE-β, but the father never had transfusion, whereas the younger son takes transfusion monthly. Mother and the elder son are HbEE without any history of transfusion. β-globin mutations of all family members were determined by ARMS-PCR. These were reconfirmed by direct sequencing of β-globin gene. Father and younger son were found to be Cod 26 (G-A)/IVS 1-5 (G-C), whereas mother and elder son were found to be Cod 26 (G-A)/Cod 26 (G-A). XmnI sequencing also revealed that all members of the family were CC. Then, flow cytometry study of red blood cells (RBCs) was performed to measure the oxidative stress of the RBCs. This study was also done on the light and dense fractions of the RBC population of the father and younger son. It was seen that the younger son suffers severe oxidative stress, which can be explained by his higher transfusion requirement. From our work, we have established the importance of taking oxidative stress of RBCs into consideration to explain the clinical manifestation and progression of haemoglobin related diseases like thalassaemia.
authors.affiliation: Department of Human Genetics, Institute of Genetic Medicine and Genomic Science, 30A Thakurhat Road, Kolkata 700128, India; Institute of Genetic Engineering, 30 Thakurhat Road, Kolkata, West Bengal 700128, India.
authors.forename: Tridip
authors.initials: T
authors.lastname: Chatterjee
authors.affiliation: Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.
authors.forename: Suchismita
authors.initials: S
authors.lastname: Halder
authors.affiliation: Department of Human Genetics, Institute of Genetic Medicine and Genomic Science, 30A Thakurhat Road, Kolkata 700128, India.
authors.forename: Amit
authors.initials: A
authors.lastname: Chakravarty
authors.affiliation: Institute of Genetic Engineering, 30 Thakurhat Road, Kolkata, West Bengal 700128, India.
authors.forename: Sudipa
authors.initials: S
authors.lastname: Chakravarty
authors.affiliation: Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.
authors.forename: Abhijit
authors.initials: A
authors.lastname: Chakrabarti