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| Content Provider | PubMed Central |
|---|---|
| Author | Dumas, Carole Anthony, Muyombwe Roy, Gaétan Matte, Claudine Ouellette, Marc Olivier, Martin Papadopoulou, Barbara |
| Copyright Year | 2003 |
| Abstract | Leishmania is an intracellular pathogen that replicates inside macrophages. Activated macrophages produce a specific subset of cytokines that play an important role in the control of Leishmania infections. As part of our interest in developing suicide parasites that produce abortive infections for the purposes of vaccination, we engineered recombinant Leishmania major strains producing biologically active granulocyte-macrophage colony-stimulating factor (GM-CSF). We showed that GM-CSF is being produced in the phagosomes of infected macrophages and that it can be detected in the culture supernatants of both infected macrophages and extracellular parasites. Our data support the notion that GM-CSF secreted by both developmental forms of recombinant L. major can activate macrophages to produce high levels of proinflammatory cytokines such as interleukin-1β (IL-1β), IL-6, and IL-18 and various chemokines including RANTES/CCL5, MIP-1α/CCL3, MIP-1β/CCL4, MIP-2/CXCL2, and MCP-1/CCL2, which enhance parasite killing. Indeed, GM-CSF-expressing parasites survive poorly in macrophages in vitro and produce delayed lesion development in susceptible BALB/c mice in vivo. Selective killing of intracellular Leishmania expressing cytokine genes capable of activating cellular responses may constitute a promising strategy to control and/or prevent parasitic infections. |
| Related Links | http://dx.doi.org/10.1128/iai.71.11.6499-6509.2003 |
| Ending Page | 6509 |
| Page Count | 11 |
| Starting Page | 6499 |
| File Format | |
| ISSN | 00199567 |
| e-ISSN | 10985522 |
| Journal | Infection and Immunity |
| Issue Number | 11 |
| Volume Number | 71 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2003-11-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology Immunology Microbiology |
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