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[Glucose-6-phosphate dehydrogenase et neonatal jaundice]
C Badens1, M Leclaire, J Collomb
1Laboratoire des Hémoglobines, Centre d'Enseignement et de Recherche en Génétique Médicale, Faculté de Médecine de la Timone, Marseille. badens@medecine.univ-mrs.fr
Insights
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is present in 2.1% of male newborns in Marseille. This deficiency increases the risk of neonatal jaundice by 2.6 times, necessitating early screening.
Area of Science:
- Medical Genetics
- Neonatology
- Public Health
Background:
- Routine screening for Glucose-6-phosphate dehydrogenase (G6PD) activity has been conducted in Marseille public maternity hospitals since 1986.
- G6PD deficiency is an inherited condition that can lead to hemolytic anemia.
Purpose of the Study:
- To determine the prevalence of G6PD deficiency in newborns screened in Marseille.
- To evaluate the association between G6PD deficiency and the risk of developing neonatal jaundice.
Main Methods:
- Retrospective study of 7779 newborns.
- G6PD activity quantified using spectrophotometric measurements on cord blood.
- Comparison of neonatal jaundice occurrence between 85 G6PD-deficient and 85 non-deficient newborns.
Main Results:
- The incidence of G6PD deficiency was 2.1% among male newborns.
- Newborns with G6PD deficiency had a 2.6 times higher relative risk of developing neonatal jaundice compared to those without the deficiency.
Conclusions:
- G6PD deficiency is a significant risk factor for pathological hyperbilirubinemia and neonatal jaundice.
- Early G6PD activity testing aids in the etiological diagnosis of neonatal jaundice.
- Identifying G6PD deficiency allows for crucial family counseling on preventing hemolytic crises.
Objective:
Since 1986, quantification of G6PD activity has been a routine test for all babies born at the public maternity hospitals of Marseilles. The objective of our study was to determine the prevalence of G6PD deficiency in the population tested and to evaluate the relative risk of neonatal jaundice in newborns with G6PD deficiency.
Methods:
Neonatal screening is performed on cord blood by spectrophotometric measurements of G6PD activity. A group of 7779 newborns was studied retrospectively. The occurrence of neonatal jaundice was evaluated in 85 children with G6PD deficiency and compared to 85 children with normal G6PD activity.
Results:
The incidence of G6PD deficiency in male newborns was found to be 2.1%. The relative risk for neonatal jaundice in the G6PD deficient population compared to the non-deficient population is estimated to be 2.6.
Conclusion:
Neonatal jaundice with pathological hyperbilirubinemia develops more frequently in cases of G6PD deficiency. The early characterization of G6PD activity provides an etiological diagnosis for neonatal jaundice, as well as the opportunity to give the newborn's family information concerning hemolytic crisis prevention.
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