Abstract:
:Anopheles gambiae uses effective immune responses, including phagocytosis, to fight microbial infection. We have developed a semiquantitative phagocytosis test and used it in conjunction with dsRNA gene silencing to test the in vivo roles of 71 candidate genes in phagocytosis of Escherichia coli and Staphylococcus aureus. Here, we show that inactivation of 26 genes changes the phagocytic activity by more than 45% and that two pathways similar to those that mediate apoptotic cell removal in Caenorhabditis elegans are used in A. gambiae for phagocytosis of microorganisms. Simultaneous inactivation of the identified regulators of phagocytosis and conserved components defining each signaling pathway permitted provisional assignment of the novel regulators to one or the other pathway. Pathway inactivation enhances at least three times the ability of E. coli and S. aureus to proliferate in the mosquito. Interestingly, mosquito survival is not compromised even if both pathways are perturbed simultaneously.
journal_name
Immunityjournal_title
Immunityauthors
Moita LF,Wang-Sattler R,Michel K,Zimmermann T,Blandin S,Levashina EA,Kafatos FCdoi
10.1016/j.immuni.2005.05.006keywords:
subject
Has Abstractpub_date
2005-07-01 00:00:00pages
65-73issue
1eissn
1074-7613issn
1097-4180pii
S1074-7613(05)00199-8journal_volume
23pub_type
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