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Effect of leptin on PMNL chemotaxis. (A) Chemotactic movement of PMNLs from HS in the presence of 70 ng/mL leptin (L) or after pre-incubation with 70 ng/mL leptin and subsequent removal (L r). Mean values ± SEM. n = 6. *P < 0.05 versus the absence of leptin (0). (B) Chemotactic movement of PMNLs from HD patients before (black bars) and after (grey bars) an HD session in the presence of 0, 10, 70 and 500 ng/mL leptin. Mean values ± SEM. n = 15.
