tetano
Editor, Senior Moderator
Science. 2016 Apr 22;352(6284):463-6. doi: 10.1126/science.aaf3926.
Mx1 reveals innate pathways to antiviral resistance and lethal influenza disease.
Pillai PS[SUP]1[/SUP], Molony RD[SUP]1[/SUP], Martinod K[SUP]2[/SUP], Dong H[SUP]1[/SUP], Pang IK[SUP]1[/SUP], Tal MC[SUP]1[/SUP], Solis AG[SUP]1[/SUP], Bielecki P[SUP]1[/SUP], Mohanty S[SUP]3[/SUP], Trentalange M[SUP]4[/SUP], Homer RJ[SUP]5[/SUP], Flavell RA[SUP]6[/SUP], Wagner DD[SUP]2[/SUP], Montgomery RR[SUP]7[/SUP], Shaw AC[SUP]3[/SUP], Staeheli P[SUP]8[/SUP], Iwasaki A[SUP]9[/SUP].
Author information
Abstract
Influenza A virus (IAV) causes up to half a million deaths worldwide annually, 90% of which occur in older adults. We show that IAV-infected monocytes from older humans have impaired antiviral interferon production but retain intact inflammasome responses. To understand the in vivo consequence, we used mice expressing a functional Mx gene encoding a major interferon-induced effector against IAV in humans. In Mx1-intact mice with weakened resistance due to deficiencies in Mavs and Tlr7, we found an elevated respiratory bacterial burden. Notably, mortality in the absence of Mavs and Tlr7 was independent of viral load or MyD88-dependent signaling but dependent on bacterial burden, caspase-1/11, and neutrophil-dependent tissue damage. Therefore, in the context of weakened antiviral resistance, vulnerability to IAV disease is a function of caspase-dependent pathology.
Copyright ? 2016, American Association for the Advancement of Science.
PMID: 27102485 [PubMed - in process]
Mx1 reveals innate pathways to antiviral resistance and lethal influenza disease.
Pillai PS[SUP]1[/SUP], Molony RD[SUP]1[/SUP], Martinod K[SUP]2[/SUP], Dong H[SUP]1[/SUP], Pang IK[SUP]1[/SUP], Tal MC[SUP]1[/SUP], Solis AG[SUP]1[/SUP], Bielecki P[SUP]1[/SUP], Mohanty S[SUP]3[/SUP], Trentalange M[SUP]4[/SUP], Homer RJ[SUP]5[/SUP], Flavell RA[SUP]6[/SUP], Wagner DD[SUP]2[/SUP], Montgomery RR[SUP]7[/SUP], Shaw AC[SUP]3[/SUP], Staeheli P[SUP]8[/SUP], Iwasaki A[SUP]9[/SUP].
Author information
Abstract
Influenza A virus (IAV) causes up to half a million deaths worldwide annually, 90% of which occur in older adults. We show that IAV-infected monocytes from older humans have impaired antiviral interferon production but retain intact inflammasome responses. To understand the in vivo consequence, we used mice expressing a functional Mx gene encoding a major interferon-induced effector against IAV in humans. In Mx1-intact mice with weakened resistance due to deficiencies in Mavs and Tlr7, we found an elevated respiratory bacterial burden. Notably, mortality in the absence of Mavs and Tlr7 was independent of viral load or MyD88-dependent signaling but dependent on bacterial burden, caspase-1/11, and neutrophil-dependent tissue damage. Therefore, in the context of weakened antiviral resistance, vulnerability to IAV disease is a function of caspase-dependent pathology.
Copyright ? 2016, American Association for the Advancement of Science.
PMID: 27102485 [PubMed - in process]