Association of unstable hemoglobin variants and heterozygous ?-thalassemia: Example of a new variant Hb acharnes or [?53(D4) Ala ? Thr]
✍ Scribed by Papassotiriou, I.; Traeger-Synodinos, J.; Prom�, D.; Kister, J.; Stamou, E.; Liakopoulou, T.; Stamoulakatou, A.; Kanavakis, E.; Wajcman, H.
- Book ID
- 101215870
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 112 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0361-8609
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✦ Synopsis
We report here the functional and structural characterization of Hb Acharnes [53(D4) Ala → Thr], an unstable and electrophoretically silent variant, that was found associated in trans with a  0 -thalassemic mutation (IVSI-1 G → A), in a patient with thalassemia intermedia syndrome. This case is discussed in comparison with other sporadic cases that we have previously investigated, resulting from the co-inheritance of a  0thalassemic mutation (CD39 C → T) with two other types of unstable hemoglobins, Hb Ko ¨ln [98(FG5) Val → Met], and Hb Arta [45(CD4) Phe → Cys]. It may be concluded that, in these associated forms, both the degree of instability of the variant and the altered oxygen binding properties (affecting the degree of tissue hypoxia) are major determinants of their clinical expression. Am.