title: The mechanism of poly I:C-induced antiviral activity in peritoneal macrophage.
abstract: Macrophages play an important role in defense against virus infection by intrinsic resistance and by extrinsic resistance. Since interferon-induced enzymes which are 2'-5' oligoadenylate synthetase and P1/eIF-2 protein kinase have been shown to be involved in the inhibition of viral replication, I examined the mechanism by which poly I:C, an interferon inducer, exerts its antiviral effects in inflammatory macrophages infected with herpes simplex virus type 1 (HSV-1). The data presented here demonstrate that poly I:C-induced antiviral activity is partially due to the activation of 2'-5' oligoadenylate synthetase. The activation of 2'-5' oligoadenylate A synthetase by poly I:C is also at least partly mediated via the production of interferon-beta. Taken together, these data indicate that interferon-beta produced in response to poly I:C acts in an autocrine manner to activate the 2'-5' oligoadenylate synthetase and to induce resistance to HSV-1.
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000378:metabolism; D000818:Animals; D000998:Antiviral Agents / Q000494:pharmacology*; D004789:Enzyme Activation; D018259:Herpesvirus 1, Human / Q000187:drug effects*; D066298:In Vitro Techniques; D017737:Macrophages, Peritoneal / Q000187:drug effects* / Q000201:enzymology / Q000821:virology; D008297:Male; D051379:Mice; D011070:Poly I-C / Q000494:pharmacology*; D011494:Protein Kinases / Q000378:metabolism; D010948:Viral Plaque Assay