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The unstable hemoglobins: a review
Progress in Clinical and Biological Research
|January 1, 1981
Summary
Unstable hemoglobin variants, caused by genetic abnormalities, lead to Unstable Hemoglobin Disease (UHD). Diagnosis and clinical presentation vary, with some cases showing Congenital Heinz Body Hemolytic Anemia (CHBHA).
Area of Science:
- Hematology
- Medical Genetics
Background:
- Over 80 genetic abnormalities are known to affect hemoglobin production, resulting in unstable variants.
- Unstable Hemoglobin Disease (UHD) encompasses a spectrum of clinical presentations caused by these variants.
Purpose of the Study:
- To review the diverse clinical manifestations of unstable hemoglobin variants.
- To discuss diagnostic approaches for Unstable Hemoglobin Disease.
- To list genetic substitutions and deletions associated with heat-labile hemoglobin.
Main Methods:
- Review of literature on genetic abnormalities of hemoglobin.
- Analysis of clinical presentations and diagnostic findings in patients with unstable hemoglobin variants.
- Compilation of known heat-unstable hemoglobin variants.
Main Results:
- Many heat-unstable hemoglobin variants do not cause in vivo hemolysis.
- Congenital Heinz Body Hemolytic Anemia (CHBHA) is one manifestation of UHD, characterized by Heinz bodies post-splenectomy.
- Heinz bodies may not be present in all clinical cases of UHD.
Conclusions:
- Unstable Hemoglobin Disease presents with varied clinical pictures and diagnostic findings.
- Accurate diagnosis requires consideration of diverse clinical presentations and specific genetic testing.
- Understanding the molecular basis of heat instability is crucial for diagnosing and managing UHD.