Journal
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
Volume 32, Issue 1, Pages 50-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dci.2007.04.001
Keywords
Dorsal; Dif; Relish; NF-kappa B; antimicrobial peptide; Toll; target genes
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Funding
- NIGMS NIH HHS [R01 GM062316, R01 GM062316-05, GM62316] Funding Source: Medline
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM062316] Funding Source: NIH RePORTER
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The NF-kappa B group of transcription factors play an important role in mediating immune responses in organisms as diverse as insects and mammals. The fruit fly Drosophila melanogaster express three closely related NF-kappa B-like transcription factors: Dorsal, Dif, and Relish. To study their roles in vivo, we used microarrays to determine the effect of null mutations in individual Rel, transcription factors on larval immune gene expression. Of the 188 genes that were significantly up-regutated in wild-type larvae upon bacterial challenge, overlapping but distinct groups of genes were affected in the Rel mutants. We also ectopically expressed Dorsal or Dif and used cDNA microarrays to determine the genes that were up-regulated in the presence of these transcription factors. This expression was sufficient to drive expression of some immune genes, suggesting redundancy in the regulation of these genes. Combining this data, we also identified novel genes that may be specific targets of Dif. (C) 2007 Elsevier Ltd. All rights reserved.
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