Winter, Christine and Taut, Katharina and Srivastava, Mrigank and Laenger, Florian and Mack, Matthias and Briles, David E. and Paton, James C. and Maus, Regina and Welte, Tobias and Gunn, Michael D. and Maus, Ulrich A. (2007) Lung-specific overexpression of CC chemokine ligand (CCL) 2 enhances the host Defense to Streptococcus pneumoniae infection in mice: Role of the CCL2-CCR2 axis. JOURNAL OF IMMUNOLOGY, 178 (9). pp. 5828-5838. ISSN 0022-1767,
Full text not available from this repository. (Request a copy)Abstract
Mononuclear phagocytes are critical components of the innate host defense of the lung to inhaled bacterial pathogens. The monocyte chemotactic protein CCL2 plays a pivotal role in inflammatory mononuclear phagocyte recruitment. In this study, we tested the hypothesis that increased CCL2-dependent mononuclear phagocyte recruitment would improve lung innate host defense to infection with Streptococcus pneumoniae. CCL2 transgenic mice that overexpress human CCL2 protein in type 11 alveolar epithelial cells and secrete it into the alveolar air space showed a similar proinflammatory mediator response and neutrophilic alveolitis to challenge with S. pneumoniae as wild-type mice. However, CCL2 overexpressing mice showed an improved pneumococcal clearance and survival compared with wild-type mice that was associated with substantially increased lung mononuclear phagocyte subset accumulations upon pneumococcal challenge. Surprisingly, CCL2 overexpressing mice developed bronchiolitis obliterans upon pneumococcal challenge. Application of anti-CCR2 Ab MC21 to block the CCL2-CCR2 axis in CCL2 overexpressing mice, though completely abrogating bronchiolitis obliterans, led to progressive pneumococcal pneumonia. Collectively, these findings demonstrate the importance of the CCL2-CCR2 axis in the regulation, of both the resolution/repair and remodelling processes after bacterial challenge and suggest that overwhelming innate immune responses may trigger bronchiolitis obliterans formation in bacterial lung infections. The Journal of Immunology, 2007, 178: 5828-5838.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MONOCYTE CHEMOATTRACTANT PROTEIN-1; RESIDENT ALVEOLAR MACROPHAGES; DENDRITIC CELLS; PNEUMOCOCCAL PNEUMONIA; PROTECTIVE IMMUNITY; INTACT MICE; RECRUITMENT; MEDIATE; SPACE; BRONCHIOLITIS; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Innere Medizin II |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2020 06:58 |
| Last Modified: | 14 Dec 2020 06:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32833 |
Actions (login required)
 |
View Item |
