In vivo identification of novel regulators and conserved pathways of phagocytosis in A. gambiae.

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

Immunity

journal_title

Immunity

authors

Moita LF,Wang-Sattler R,Michel K,Zimmermann T,Blandin S,Levashina EA,Kafatos FC

doi

10.1016/j.immuni.2005.05.006

keywords:

subject

Has Abstract

pub_date

2005-07-01 00:00:00

pages

65-73

issue

1

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(05)00199-8

journal_volume

23

pub_type

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