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Bae J, Ahn WK, Jang J, Jang H, Kang H, Rim JH, Hahn SM, Han JW, Lyu CJ, Lim JB. The First Korean Hemoglobinopathy With Unique Hemoglobin Electrophoresis Results Diagnosed as Hemoglobin Boras. Ann Lab Med 2024; 44:97-99. [PMID: 37665291 PMCID: PMC10485859 DOI: 10.3343/alm.2024.44.1.97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/26/2023] [Accepted: 08/02/2023] [Indexed: 09/05/2023] Open
Affiliation(s)
- Jeongyun Bae
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Won Kee Ahn
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - Jaehyeok Jang
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hanmil Jang
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hyein Kang
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - John Hoon Rim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Seung Min Hahn
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - Jung Woo Han
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - Chuhl Joo Lyu
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea
- Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - Jong-Baeck Lim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
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Abstract
About 70 variants of Hb A with associated hemolytic disorders have been reported during the past 30 years. I have classified them according to four grades of severity of chronic hemolysis. Acute episodes of severe hemolysis may be seen in all classes. In addition, some 80 variants without overt hemolysis have given positive results with in vitro hemoglobin instability tests. The stereochemical bases for instability can be conjectured in most cases, although few unstable hemoglobins have actually been studied by X-ray crystallography. The mechanisms for denaturation of normal Hb A and its acceleration in unstable hemoglobins were proposed some 15 years ago. The alterations of membrane lipids and proteins leading to red cell senescence and the relevance of hemoglobin denaturation to this process are presently being investigated. Several "hyperunstable" variants are clinically silent, or equivalent to a thalassemia, probably because of very efficient degradation of the abnormal chains.
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Affiliation(s)
- Y Ohba
- Department of Clinical Laboratory Science, Yamaguchi University School of Medicine, Ube, Japan
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