PMID- 12588706 OWN - NLM STAT- MEDLINE DCOM- 20040326 LR - 20200930 IS - 1040-0605 (Print) IS - 1040-0605 (Linking) VI - 286 IP - 3 DP - 2004 Mar TI - Antimacrophage chemokine treatment prevents neutrophil and macrophage influx in hyperoxia-exposed newborn rat lung. PG - L488-93 AB - Macrophage-derived cytokines may provoke the inflammatory response in lung injury. Because macrophage influx is a prominent feature of the cellular inflammatory response accompanying the development of bronchopulmonary dysplasia, we hypothesized that blocking macrophage influx would reduce overall cellular influx and oxidative damage. Newborn rats were exposed at birth to 95% O(2) or air for 1 wk, and hyperoxia-exposed pups were injected with anti-monocyte chemoattractant protein-1 (MCP-1) or IgG control on days 3-5. MCP-1 was increased in bronchoalveolar lavage fluid and in histological sections from the 95% O(2)-exposed, IgG-injected pups compared with air-exposed controls. At 1 wk, anti-MCP-1-treated pups had reduced leukocyte numbers, both macrophages and neutrophils, in bronchoalveolar lavage fluid compared with IgG-treated controls. Cytokine-induced neutrophil chemoattractant-1, the rat analog of IL-8, was not significantly decreased in lavage fluid but was reduced in lung cells in anti-MCP-1-treated pups. Tissue carbonyls, a measure of protein oxidation, were decreased in anti-MCP-1-treated pups. Anti-MCP-1 treatment prevented neutrophil influx and reduced protein oxidation in hyperoxia-exposed newborn rats. FAU - Vozzelli, Michael A AU - Vozzelli MA AD - Department of Pediatrics, Division of Neonatal Medicine, Neonatal-Perinatal Research Institute, Durham, NC 27710, USA. auten@duke.edu FAU - Mason, S Nicholas AU - Mason SN FAU - Whorton, Mary H AU - Whorton MH FAU - Auten, Richard L Jr AU - Auten RL Jr LA - eng GR - HL-67021/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. DEP - 20030214 PL - United States TA - Am J Physiol Lung Cell Mol Physiol JT - American journal of physiology. Lung cellular and molecular physiology JID - 100901229 RN - 0 (Chemokine CCL2) RN - 0 (Chemokines, CXC) RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 7440-44-0 (Carbon) SB - IM MH - Animals MH - Animals, Newborn MH - Bronchoalveolar Lavage Fluid/cytology/immunology MH - Bronchopulmonary Dysplasia/*immunology MH - Carbon/metabolism MH - Chemokine CCL2/metabolism/pharmacology MH - Chemokines, CXC/metabolism MH - Female MH - Humans MH - Hyperoxia/immunology MH - Hypoxia/*immunology MH - Infant, Newborn MH - Intercellular Signaling Peptides and Proteins/metabolism MH - Lung/cytology/*immunology/metabolism MH - Macrophages/*cytology/immunology MH - Neutrophils/*cytology/immunology MH - Oxidative Stress/immunology MH - Pregnancy MH - Rats MH - Rats, Sprague-Dawley MH - Respiratory Mucosa/cytology/immunology/metabolism EDAT- 2003/02/18 04:00 MHDA- 2004/03/27 05:00 CRDT- 2003/02/18 04:00 PHST- 2003/02/18 04:00 [pubmed] PHST- 2004/03/27 05:00 [medline] PHST- 2003/02/18 04:00 [entrez] AID - 00414.2002 [pii] AID - 10.1152/ajplung.00414.2002 [doi] PST - ppublish SO - Am J Physiol Lung Cell Mol Physiol. 2004 Mar;286(3):L488-93. doi: 10.1152/ajplung.00414.2002. Epub 2003 Feb 14.