Brazee PL, et al. Linear ubiquitin assembly complex regulates lung epithelial driven responses during influenza infection. J Clin Invest. 2019 Nov 12.
Influenza A virus (IAV) is among the most common causes of pneumonia related death worldwide. Pulmonary epithelial cells are the primary target for viral infection and replication and respond by releasing inflammatory mediators that recruit immune cells to mount the host response. Severe lung injury and death during IAV infection results from an exuberant host inflammatory response. The linear ubiquitin assembly complex (LUBAC), composed of SHARPIN, HOIL-1L and HOIP, is a critical regulator of NF-κB-dependent inflammation. Using mice with lung epithelial specific deletions of HOIL-1L or HOIP in a model of IAV infection, we provided evidence that, while a reduction in the inflammatory response was beneficial, ablation of the LUBAC-dependent lung epithelial-driven response worsened lung injury and increased mortality. Moreover, we described a mechanism for the upregulation of HOIL-1L in infected and non-infected cells triggered by the activation of type I interferon receptor and mediated by IRF1, which was maladaptive and contributed to hyper-inflammation. Thus, we propose that lung epithelial LUBAC acts as a molecular rheostat that could be selectively targeted to modulate the immune response in patients with severe IAV-induced pneumonia.
See Also:
Latest articles in those days:
- Highly pathogenic avian influenza as a systemic risk - implications for control and preparedness 21 hours ago
- Multiple introductions and spread of novel reassortant highly pathogenic avian influenza A (H5N1) clade 2.3.4.4b viruses via wild birds, South Korea, 2024-2025 21 hours ago
- [preprint]The mammalian-adaptive PB2-E627K substitution preserves viral fitness of clade 2.3.4.4b H5N1 HPAIV in birds 1 days ago
- Mallard super-shedders of avian influenza exhibit distinct cloacal microbial abundance profiles 2 days ago
- A digitally immune-optimized influenza vaccine broadly neutralizes swine and human H1N1 influenza viruses and protects from heterologous challenge 2 days ago
[Go Top] [Close Window]


