Cyclosporin-A augments respiratory burst of whole blood phagocytes in pregnant rats.
Both pregnancy and cyclosporin A (CsA) are known to inhibit T-cell mediated immune response and to activate phagocytes against microbial infections as a compensatory mechanism. Pregnant women, either with organ transplantation or suffering from autoimmune diseases, are commonly managed with CsA therapy. This investigation was aimed to study effect of CsA on phagocytic activity of whole blood polymorphonuclear leukocytes (PMNs) in pregnant rats. Both pregnant and non-pregnant Sprague-Dawley rats (4 animals per group) were treated with CsA (40 mg/kg, oral) for 7 days starting from gestation day 7. Respective control groups of non-pregnant and pregnant rats received vehicle only. Luminol-dependent chemiluminescence (CL) was used to measure the generation of reactive oxygen species (ROS) in respiratory burst of whole blood PMNs stimulated by zymosan. The results showed a moderate and insignificant increase in CL response in non-pregnant rats with CsA treatment or pregnant rats without CsA treatment. Whereas the CL response of whole blood PMNs was significantly higher (ANOVA F = 35.66, P < 0.001) in pregnant rats treated with CsA. In conclusion, this preliminary study demonstrates synergistic effects of pregnancy and CsA on activation of PMNs resulting in massive and sustained generation of ROS that could be deleterious to both host and fetus.
Khan
Haseeb Ahmad
HA
Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia. khan_haseeb@yahoo.com
D000704:Analysis of Variance; D000818:Animals; D016572:Cyclosporine / Q000494:pharmacology*; D005260:Female; D007166:Immunosuppressive Agents / Q000494:pharmacology*; D049449:Luminescence; D008165:Luminol; D009504:Neutrophils / Q000187:drug effects / Q000378:metabolism; D010101:Oxygen Consumption / Q000187:drug effects; D010586:Phagocytes / Q000187:drug effects*; D010587:Phagocytosis / Q000187:drug effects; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D017382:Reactive Oxygen Species / Q000378:metabolism; D016897:Respiratory Burst / Q000187:drug effects*
D007166:Immunosuppressive Agents; D017382:Reactive Oxygen Species; D008165:Luminol; D016572:Cyclosporine