PMID- 7527830 OWN - NLM STAT- MEDLINE DCOM- 19950119 LR - 20190516 IS - 0741-5400 (Print) IS - 0741-5400 (Linking) VI - 56 IP - 6 DP - 1994 Dec TI - Kinetics of macrophage subpopulations and expression of monocyte chemoattractant protein-1 (MCP-1) in bleomycin-induced lung injury of rats studied by a novel monoclonal antibody against rat MCP-1. PG - 741-50 AB - We investigated the kinetics of macrophage subpopulations and the expression of monocyte chemoattractant protein 1 (MCP-1) in a rat model of bleomycin-induced lung injury. Rat macrophage subpopulations were examined by immunohistochemistry using various anti-rat macrophage monoclonal antibodies (mAbs) and their proliferative capacity by [3H]thymidine (3HTdR) autoradiography. To detect the localization of expressed MCP-1, we generated an mAb against rat MCP-1 for immunohistochemical staining. Expression of MCP-1 messenger RNA (mRNA) was detected by Northern blot hybridization. Shortly after intratracheal instillation of bleomycin, the number of exudate macrophages recognized by mAb TRPM-3 increased in the injured lungs, peaked 3 days later, and decreased thereafter, whereas tissue macrophages identified by mAb ED2 increased slowly and peaked 2 weeks after instillation. Northern blot analysis disclosed that the expression of MCP-1 mRNA in the lung was most prominent 1 day after instillation and declined thereafter, preceding the numerical change of the TRPM-3-positive exudate macrophages. Immunohistochemistry with anti-rat MCP-1 revealed that the main sources of MCP-1 production were alveolar and interstitial macrophages and polymorphonuclear leukocytes. Based on these results, MCP-1 produced by polymorphonuclear leukocytes and by alveolar and interstitial macrophages is thought to induce the infiltration of blood monocytes, and infiltrated exudate macrophages produce MCP-1 to enhance subsequent accumulation of macrophages. In contrast, the expression of MCP-1 did not correlate with the numerical changes of the ED2-positive macrophages. FAU - Sakanashi, Y AU - Sakanashi Y AD - Second Department of Pathology, Kumamoto University School of Medicine, Japan. FAU - Takeya, M AU - Takeya M FAU - Yoshimura, T AU - Yoshimura T FAU - Feng, L AU - Feng L FAU - Morioka, T AU - Morioka T FAU - Takahashi, K AU - Takahashi K LA - eng PT - Journal Article PL - England TA - J Leukoc Biol JT - Journal of leukocyte biology JID - 8405628 RN - 0 (Antibodies, Monoclonal) RN - 0 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (RNA, Messenger) RN - 10028-17-8 (Tritium) RN - 11056-06-7 (Bleomycin) RN - VC2W18DGKR (Thymidine) SB - IM MH - Animals MH - Antibodies, Monoclonal/biosynthesis MH - Autoradiography MH - Base Sequence MH - Bleomycin/*toxicity MH - Blotting, Northern MH - Cell Cycle MH - Cell Division MH - Chemokine CCL2 MH - Chemotactic Factors/analysis/immunology/*physiology MH - Disease Models, Animal MH - Fibrosis MH - Immunohistochemistry MH - Lung/chemistry/cytology/drug effects MH - Lung Diseases/chemically induced/*metabolism/*pathology MH - Macrophages/*cytology/*metabolism MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Molecular Sequence Data MH - RNA, Messenger/analysis MH - Rats MH - Rats, Wistar MH - Thymidine/metabolism MH - Tritium EDAT- 1994/12/01 00:00 MHDA- 1994/12/01 00:01 CRDT- 1994/12/01 00:00 PHST- 1994/12/01 00:00 [pubmed] PHST- 1994/12/01 00:01 [medline] PHST- 1994/12/01 00:00 [entrez] AID - 10.1002/jlb.56.6.741 [doi] PST - ppublish SO - J Leukoc Biol. 1994 Dec;56(6):741-50. doi: 10.1002/jlb.56.6.741.