Platelet recruitment into endotoxemic lungs with or without neutrophils. (A) Amount of wild-type platelet recruitment into the lung in untreated and LPS-treated mice. In a second series of experiments, mice received anti-neutrophil antibody and then received LPS and wild-type ⁵¹Cr-labeled platelets. □ indicates untreated; ▪, LPS. (B) Summary of the amount of neutrophil influx (myeloperoxidase) into lungs in response to LPS in mice that did or did not receive antithrombocyte serum (ATS). Data are expressed as the arithmetic mean ± SEM from 4 mice in each group. ^*P < .05 versus groups not receiving LPS.