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Journal of the Society for Gynecologic Investigation, Vol. 12, No. 1, 46-49 (2005)
DOI: 10.1016/j.jsgi.2004.08.005

Peripheral Polymorphonuclear Leukocyte Priming Contributes to Oxidative Stress in Early Pregnancy

V. Fait, MD

Bruce Rappaport School of Medicine, Technion, Haifa, Israel; Department of Obstetncs and Gynecology, Western Galilee Hospital, PO Box 21, Nahanya 22100, Israel; f1965zxcv{at}hotmail.com

S. Sela, PhD

E. Ophir, MD

H. Kreutzer, MD

O. Shnaider, MD

A. Perri, MD

N. Khatib, MD

G. Dourleshter, MD

R. Tendler, MD

J. Bornstein, MD

Department of Obstetncs and Gynecology, Eliachar Research Laboratory, Western Galilee Hospital, Nahanya; Bruce Rappaport School of Medicine, Technion, Haifa, Israel

Objective: The cause of elevated blood leukocyte count in pregnancy is unknown. We hypothesized that priming of peripheral polymorphonuclear leukocytes (PMNL) caused this elevation.

Methods: Eleven women in the first trimester of pregnancy were included in this prospective study. Peripheral venous blood was drawn twice from each woman, before and after a medical abortion (pregnant and nonpregnant, respectively). Complete blood cell count, plasma alkaline phosphatase (ALP), and rate of superoxide release from separated phobrol 12-myristate-13-acetate (PMA)-stimulated PMNL were determined.

Results: The PMNL count in early pregnancy was significantly higher, with a signficant increase in the PMNL rate of superoxide release compared to the nonpregnant state. A linear correlation between the rates of superoxide release and PMNL counts before and during pregnancy was found. ALP levels were signftcantly elevated in early pregnancy.

Conclusion: The increased PMNL count is probably a compensatory response to PMNL priming. The increased rate of superoxide release from primed PMNL may contribute to oxidative stress in early pregnancy.

Key Words: Oxidative stress • pregnancy • peripheral polymorphonuclear leukocytes • alkaline phosphatase


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