Les polydnavirus, des entités virales domestiquées par les guêpes parasites
作者： S. Savary , J.-M. Drezen , G. Periquet , M. Poirié
DOI:
关键词: Biology 、 Ichnovirus 、 Bracovirus 、 Molecular biology 、 Polydnavirus 、 Cotesia congregata 、 Pathogenicity
摘要: De nombreuses especes d’hymenopteres ont developpe des strategies parasitaires aux depens d’autres insectes. Pour contourner les defenses immunitaires, ils mis au point procedes permettant de "manipuler" la physiologie leurs hotes. Une plus originales consiste a introduire dans le corps l’hote particules virales type polydnavirus. Ces virus sont etroitement associes guepes qui hebergent. Ils se repliquent exclusivement cellules specialisees l’ovaire et injectes tissus en grande quantite avec œufs du parasite. Apres leur penetration l’hote, il y expression d’une serie proteines dont l’action traduit par modifications touchant son immunite, sa croissance developpement. Plusieurs laboratoires s’attachent caracteriser ces comprendre mode d’action. Afin d’obtenir indices sur l’origine evolutive associations symbiotiques uniques entre organismes eucaryotes, essaient egalement determiner mecanisme moleculaire lequel guepe controle propre virus.
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