Prenatal diagnosis of chronic granulomatous disease in a male fetus.
Mutations in any of four known NADPH-oxidase components lead to CGD. X-linked CGD (X-CGD) is caused by defects in CYBB, the gene that encodes gp91-phox. Autosomal recessive (AR) CGD is caused by defects in the genes for p47 phox, p22-phox or p67-phox. The aim of this study was to screen the molecular defect in the fetus of an X-CGD carrier mother and postnatal confirmation of the results. In a family whose first-born child died from X-CGD, fetal DNA was obtained from an ongoing pregnancy by chorionic villus sampling (CVS). Direct sequencing was used to detect the previously identified CYBB gene mutation. The NADPH oxidase activity in the neutrophils from the carrier mother and from the newborn was analyzed by the DHR assay. Our studies predicted that the fetus in question was not affected by chronic granulomatous disease, which was demonstrated to be correct at birth. For prenatal screening in a pregnant X-CGD carrier, direct sequencing is a good method for detecting the mutation in the fetal DNA. Postnatal confirmation of results with the DHR assay is more practical than mutation screening to show whether the newborn have normal NADPH oxidase activity or does not.
Yavuz Köker
M
M
Immunology Division, Diskapi Children's Research Hospital, Ankara, Turkey. kokyavuz@hotmail.com
Metin
Ayşe
A
Ozgür
Tuba T
TT
de Boer
Martin
M
Roos
Dirk
D
D000328:Adult; D001483:Base Sequence / Q000235:genetics; D015193:Chorionic Villi Sampling; D018389:Codon, Nonsense / Q000235:genetics; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis* / Q000235:genetics; D005456:Fluorescent Dyes / Q000378:metabolism; D006105:Granulomatous Disease, Chronic / Q000151:congenital* / Q000175:diagnosis* / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases / Q000235:genetics / Q000378:metabolism; D009504:Neutrophils / Q000201:enzymology; D010375:Pedigree; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012235:Rhodamines / Q000378:metabolism
D018389:Codon, Nonsense; D005456:Fluorescent Dyes; D008562:Membrane Glycoproteins; D012235:Rhodamines; C058319:dihydrorhodamine 123; C056558:CYBB protein, human; D000074662:NADPH Oxidase 2; D019255:NADPH Oxidases