Journal
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
Volume 29, Issue 9, Pages 1705-1711Publisher
SPRINGER
DOI: 10.1007/s11274-013-1333-1
Keywords
Insecticidal protein; Galleria mellonella; Immune response; Proteomic analysis
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Funding
- National Natural Science Foundation of China [31071741]
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The bacteria Xenorhabdus spp. are entomopathogenic symbionts that can produce several toxic proteins that interfere with the immune system of insects. Recently, we purified the insecticidal protein XeGroEL from Xenorhabdus ehlersii and discovered that injection of XeGroEL into larvae of Galleria mellonella triggers strong immune responses. In this study, we determined the level of induction of several immune-responsive proteins that were secreted into the hemolymph using comparative proteomic analyses of hemolymph proteins from XeGroEL-challenged larvae. Additionally, quantitative real-time reverse transcription-PCR analyses demonstrated increased transcriptional rates of immune-related genes at 5 h post-challenge with purified XeGroEL. Our results help to understand anti-microbial immune responses in G. mellonella, suggesting that the immune system recognizes exogenous proteins and pathogen-associated molecular patterns.
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