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Horm Metab Res 2001; 33(4): 227-231
DOI: 10.1055/s-2001-14953
Original Clinical
© Georg Thieme Verlag Stuttgart · New York

Lipid Peroxidation, Antioxidant Defence and Acid-Base Status in Cord Blood at Birth: The Influence of Diabetes

M. Kinalski1 , A. Śledziewski2 , B. Telejko3 , I. Kowalska3 , A. Krętowski3 , W. Zarzycki3 , I. Kinalska3
  • 1 Department of Pathophysiology of Pregnancy, Medical Academy Białystok, Poland
  • 2 Department of Fetal and Neonatal Development, National Research Institute of Mother and Child Białystok, Poland
  • 3 Department of Endocrinology, Medical Academy Białystok, Poland
Further Information

Publication History

Publication Date:
31 December 2001 (online)

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Pregnancy complicated by poor control of diabetes is associated with a higher risk of embryopathies, spontaneous abortions and perinatal mortality. A number of authors suggest an involvement of reactive oxygen species (ROS) in diabetic pregnancy. Determining lipid peroxidation products (LP), scavenging enzyme activities and the umbilical cord blood’s acid-base balance may contribute to an adequate diagnosis of the neonate at birth. Nevertheless, such measurements seem to have limited value in practical clinical routine. The present study evaluates LP, antioxidant defence and acid-base status related to diabetic pregnancy. Twenty- eight women with type 1 diabetes (PGDM), 19 with gestational diabetes (GDM) and 13 control cases were investigated. An additional control group consisted of 15 healthy patients with negative diabetic history; all women underwent vaginal delivery. Immediately after delivery cord blood samples and placental tissue were collected for malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione (GSH) determination. Additionally, pH, pCO2, pO2 and base excess were measured in both vessels and compared to identify and exclude double venous samples. MDA levels in both cord blood and placental homogenates were significantly higher in both pregestational and gestational diabetic groups, but SOD activity was significantly diminished. Cord blood GSH was markedly elevated in PGDM and GDM. We have also shown significant differences in acid-base parameters in infants of PGDM group. Statistical analysis was performed using the Mann-Whitney U-test.

These findings indicate an excessive oxidative stress in pregnancy complicated by diabetes mellitus. Evaluating LP products and scavenging enzyme activities may be valuable, sensitive indexes of fetal/neonatal threat in diabetic pregnancy in humans. Since oxidative stress is an important pathway for fetal injury, we believe that obtaining adequate measurements at the time of birth would contribute to clarifying the fetal/neonatal status in a medical and legal context and might be of value in altering therapy in newborn infants.

Key words:

Pregnancy - Diabetes Mellitus - Oxidative Stress - Lipid Peroxidation - Acid-Base Status

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 M. Kinalski, M.D.

Department of Pathophysiology of Pregnancy
Medical Academy in Białystok

M. Curie-Sklodowska 24 A
15-276 Białystok
Poland


Phone: Phone:+ 48 (85) 4768352

Fax: Fax:+ 48 (85) 4768682

Email: E-mail:Makkinal@amb.ac.bialystok.pl

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