Abstract:
:Although many properties of the innate immune system are shared among multicellular animals, the evolutionary origin remains poorly understood. Here we characterize the innate immune system in Hydra, one of the simplest multicellular animals known. In the complete absence of both protective mechanical barriers and mobile phagocytes, Hydra's epithelium is remarkably well equipped with potent antimicrobial peptides to prevent pathogen infection. Induction of antimicrobial peptide production is mediated by the interaction of a leucine-rich repeats (LRRs) domain containing protein with a TIR-domain containing protein lacking LRRs. Conventional Toll-like receptors (TLRs) are absent in the Hydra genome. Our findings support the hypothesis that the epithelium represents the ancient system of host defence.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Bosch TC,Augustin R,Anton-Erxleben F,Fraune S,Hemmrich G,Zill H,Rosenstiel P,Jacobs G,Schreiber S,Leippe M,Stanisak M,Grötzinger J,Jung S,Podschun R,Bartels J,Harder J,Schröder JMdoi
10.1016/j.dci.2008.10.004subject
Has Abstractpub_date
2009-04-01 00:00:00pages
559-69issue
4eissn
0145-305Xissn
1879-0089pii
S0145-305X(08)00232-2journal_volume
33pub_type
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