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(Journal of Leukocyte Biology. 2001;69:340-342.)
© 2001 by Society for Leukocyte Biology

DNA damage and apoptosis in mononuclear cells from glucose-6-phosphate dehydrogenase-deficient patients (G6PD Aachen variant) after UV irradiation

Thomas Efferth, Ursula Fabry and Rainhardt Osieka

Department for Internal Medicine IV, University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany

Correspondence: Thomas Efferth, Virtual Campus Rhineland-Palatinate, P.O. Box 4380, 55033 Mainz, Germany.

Patients affected with X chromosome-linked, hereditary glucose-6-phosphate dehydrogenase (G6PD) deficiency suffer from life-threatening hemolytic crises after intake of certain drugs or foods. G6PD deficiency is associated with low levels of reduced glutathione. We analyzed mononuclear white blood cells (MNC) of three males suffering from the German G6PD Aachen variant, four heterozygote females of this family, one G6PD-deficient male from another family coming from Iran, and six healthy male volunteers with respect to their DNA damage in two different genes (G6PD and T-cell receptor-{delta}) and their propensity to enter apoptosis after UV illumination (0.08–5.28 J/cm2). As determined by PCR stop assays, there was more UV-induced DNA damage in MNC of G6PD-deficient male patients than in those of healthy subjects. MNC of G6PD-deficient patients showed a higher rate of apoptosis after UV irradiation than MNC of healthy donors. MNC of heterozygote females showed intermediate rates of DNA damage and apoptosis. It is concluded that increased DNA damage may be a result of deficient detoxification of reactive oxygen species by glutathione and may ultimately account for the higher rate of apoptosis in G6PD-deficient MNC.

Key Words: flow cytometry • glutathione • polymerase chain reaction • NADPH




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