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Insect Infection and ImmunityEvolution, Ecology, and Mechanisms$
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Jens Rolff and Stuart Reynolds

Print publication date: 2009

Print ISBN-13: 9780199551354

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780199551354.001.0001

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Polydnaviruses as tools to deliver wasp virulence factors to impair lepidopteran host immunity

Polydnaviruses as tools to deliver wasp virulence factors to impair lepidopteran host immunity

Chapter:
(p.137) CHAPTER 9 Polydnaviruses as tools to deliver wasp virulence factors to impair lepidopteran host immunity
Source:
Insect Infection and Immunity
Author(s):

Sebastien Moreau

Elisabeth Huguet

Jean-Michel Drezen

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199551354.003.0009

The associations between several thousands of parasitic wasps and viruses (polydnaviruses or PDVs) represent a unique example where a complex virus machinery has been domesticated by one organism (the parasitic wasp) to manipulate the physiology of another (the parasitized lepidopteran larval host). The viral machinery produces particles used to transfer and express virulence genes encoding factors that impair host immunity. PDV particles, injected along with parasite eggs into the host body, manipulate host immune defences and development, thus enabling wasp larvae to survive and develop in a potentially harmful environment. This chapter begins by presenting the characteristics of PDVs and the origin of the genes they encode. It then describes the general effect of PDVs on the insect immune system, and finally reviews functional analyses of PDV products.

Keywords:   PDV, parasitic wasps, viruses, insect immunity, host immunity

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