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Published on: January 2, 2013
[Glucose-6-phosphate dehydrogenase deficiency and hereditary hemolytic anemia]
A M Salvati1, D Maffi, P Caprari
1Laboratorio di Biochimica Clinica, Istituto Superiore di Sanità, Roma.
Insights
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a common genetic disorder. Early diagnosis and surveillance are key to preventing hemolytic disease, especially in high-prevalence regions.
Area of Science:
- Genetics
- Biochemistry
- Hematology
Context:
- Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most prevalent enzymopathy globally.
- It exhibits significant genetic heterogeneity with over 100 identified mutations and 400 variants.
- High prevalence rates are observed in tropical Africa, the Middle East, Mediterranean regions, Asia, and Oceania.
Purpose:
- To summarize the epidemiology, genetics, clinical manifestations, and management strategies for G6PD deficiency.
- To highlight the importance of early diagnosis, patient education, and surveillance for disease prevention.
Summary:
- G6PD deficiency is a sex-linked inherited disorder characterized by reduced erythrocyte G6PD activity.
- Clinical consequences include neonatal jaundice and drug/infection/fava bean-induced hemolytic crises.
- Rare variants can cause chronic non-spherocytic hemolytic anemia.
Impact:
- Early diagnosis, education, and epidemiologic surveillance are crucial for preventing hemolytic disease.
- These measures should be integrated into national health programs, particularly in high-prevalence countries.
- Effective management strategies can mitigate the health burden of this common genetic disorder.
Abstract:
G6PD deficiency is the most common enzymopathy in the world. The highest frequency values are found in tropical Africa, in the Middle East, in some areas of the Mediterranean, in tropical and sub-tropical Asia and in Oceania. This genetic defect shows sex linked inheritance and a marked heterogeneity. At least 400 abnormal variants with different biochemical characteristics and about 100 diverse mutations have been identified. In most cases the phenotypic expression is a marked decrease in erythrocyte G6PD activity. The most common clinical consequences are neonatal jaundice and sporadic haemolytic crises caused by a number of drugs, by infections or by ingestion of fava beans. A few cases of chronic non-spherocytic haemolytic anaemia associated with rare molecular variants have been reported. Early diagnosis, education and epidemiologic surveillance have been proved to be cornerstones in the prevention of the haemolytic disease. Therefore they should be taken into account in the national health programmes, especially in the countries with high prevalence rates.
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