Sequential activation of signaling pathways during innate immune responses in Drosophila.
Innate immunity is essential for metazoans to fight microbial infections. Genome-wide expression profiling was used to analyze the outcome of impairing specific signaling pathways after microbial challenge. We found that these transcriptional patterns can be dissected into distinct groups. We demonstrate that, in addition to signaling through the Toll and Imd pathways, signaling through the JNK and JAK/STAT pathways controls distinct subsets of targets induced by microbial agents. Each pathway shows a specific temporal pattern of activation and targets different functional groups, suggesting that innate immune responses are modular and recruit distinct physiological programs. In particular, our results may imply a close link between the control of tissue repair and antimicrobial processes.
Boutros
Michael
M
Department of Genetics, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA.
Agaisse
Hervé
H
Perrimon
Norbert
N
D000818:Animals; D002460:Cell Line; D004331:Drosophila melanogaster / Q000187:drug effects / Q000235:genetics* / Q000276:immunology*; D020869:Gene Expression Profiling; D017344:Genes, Insect; D007113:Immunity, Innate; D048031:JNK Mitogen-Activated Protein Kinases; D008070:Lipopolysaccharides / Q000494:pharmacology; D020928:Mitogen-Activated Protein Kinases / Q000235:genetics; D011987:Receptors, Steroid / Q000235:genetics; D011988:Receptors, Thyroid Hormone / Q000235:genetics; D015398:Signal Transduction; D014158:Transcription, Genetic
D008070:Lipopolysaccharides; D011987:Receptors, Steroid; D011988:Receptors, Thyroid Hormone; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases