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The objective was to examine the effects of caffeine, dibutyryl cyclic AMP, and heparin on the chemotaxis and/or phagocytosis of PMNs for porcine sperm. The chemotactic activity of PMNs, determined in a blind well chamber, increased (P < 0.05) when fresh serum was added to the medium (control containing BSA, 1109.5 cells/mm 2 vs serum, 1226.3 cells/mm 2 ), regardless of the presence...
Although polymorphonuclear leukocytes (PMNs) are recruited into the uterine lumen to phagocytize sperm, factors controlling the phagocytotic ability of PMNs in cattle are not well documented. The objective was to determine the effects of blood serum, caffeine, and heparin on chemotaxis of PMNs for sperm and phagocytosis of sperm by PMNs in cows. Polymorphonuclear leukocytes were obtained (centrifugation)...
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