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Dehghani SJ, Amiri Dashtarzhen A, Nasirabadi S, Dehbozorgian J, Afrasiabi AR, Morshedi N, Imanifard J, Mehrpoor S, Gerdabi J, Karimi M. Combined α-thalassemia and Hemoglobin J-Iran (β77 His → Asp). A Family Study in southern Iran. Iran Red Crescent Med J 2011; 13:586-9. [PMID: 22737531 PMCID: PMC3371998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2010] [Accepted: 04/11/2011] [Indexed: 11/08/2022]
Abstract
We report a 23-year-old man and three members of his family with Hb J-Iran confirmed by electrophoresis, chain separation by high performance liquid chromatography and sequencing. Alpha thalassemia was also confirmed in two family members. The substitution at β77 led to a higher negative charge of the βJ-Iran subunit, which enhanced its electrostatic attraction for the normal positively-charged α subunit. Therefore, more Hb J-Iran than Hb A forms in the red blood cells of heterozygotes. In α-thalassemia, the more attractive βJ-Iran subunit outcompetes βA subunits in forming assemblies with deficient α subunits, so even more Hb J-Iran was formed.
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Affiliation(s)
- S J Dehghani
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - A Amiri Dashtarzhen
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Sh Nasirabadi
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - J Dehbozorgian
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - A R Afrasiabi
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - N Morshedi
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - J Imanifard
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Sh Mehrpoor
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - J Gerdabi
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - M Karimi
- Hematology Research Center, Shiraz University of Medical Science, Shiraz, Iran,Correspondence: Mehran Karimi, MD, Professor of Pediatric Hematology-Oncology, Hematology Research Center, Nemazee Hospital, Shiraz, Iran. Tel.: +98-711-6473239, Fax: +98-711-6473239, E-mail:
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