Glucose-6-phosphate dehydrogenase activity in term and near-term, male African American neonates.
BACKGROUND
We determined values for glucose-6-phosphate dehydrogenase (G-6-PD) activity in African American neonates.


METHODS
G-6-PD activity was measured on umbilical cord blood from term and near-term healthy, male neonates. Neonates were stratified according to the number of neonates for each numerical unit of G-6-PD activity. Corrected end tidal carbon monoxide (ETCOc), a non-invasive index of hemolysis, was performed on each neonate. At least one predischarge transcutaneous bilirubin determination was performed.


RESULTS
Five hundred neonates were studied. Two subpopulations were apparent, with no overlap between the subgroups. Mean value for the 64 (12.8%) infants with the lower values (G-6-PD deficient) was 2.7+/-1.1 U/g Hb, range 0.4-6.6 U/g Hb, while that for the 436 neonates with the higher values (G-6-PD normal) was 21.8+/-2.9 U/g Hb, range 14.5-33.8 U/g Hb. No significant differences in activity were noted between those neonates <37 weeks gestational age and those >37 weeks. Enzyme activity in the lower range in both groups was not related to the development of hyperbilirubinemia. G-6-PD enzyme activity did not correlate with ETCOc values either for the entire cohort or for the individual subsets.


CONCLUSIONS
G-6-PD-deficient neonates formed a separate subgroup from those with normal enzyme activity. The data supplied should facilitate interpretation of G-6-PD test results.
Kaplan
Michael
M
Department of Neonatology, Shaare Zedek Medical Center, Jerusalem, Israel. kaplan@cc.huji.ac.il
Hoyer
James D
JD
Herschel
Marguerite
M
Hammerman
Cathy
C
Stevenson
David K
DK
D001741:Black or African American; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism*; D005955:Glucosephosphate Dehydrogenase Deficiency / Q000175:diagnosis / Q000208:ethnology*; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D012016:Reference Values
D005954:Glucosephosphate Dehydrogenase