tetano
Editor, Senior Moderator
Mucosal Immunol. 2017 Mar 22. doi: 10.1038/mi.2017.16. [Epub ahead of print]
[h=1]The cell surface mucin MUC1 limits the severity of influenza A virus infection.[/h] McAuley JL[SUP]1[/SUP], Corcilius L[SUP]2[/SUP], Tan HX[SUP]1[/SUP], Payne RJ[SUP]2[/SUP], McGuckin MA[SUP]3[/SUP], Brown LE[SUP]1[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Cell surface mucin (cs-mucin) glycoproteins are constitutively expressed at the surface of respiratory epithelia where pathogens such as influenza A virus (IAV) gain entry into cells. Different members of the cs-mucin family each express a large and heavily glycosylated extracellular domain that towers above other receptors on the epithelial cell surface, a transmembrane domain that enables shedding of the extracellular domain, and a cytoplasmic tail capable of triggering signaling cascades. We hypothesized that IAV can interact with the terminal sialic acids presented on the extracellular domain of cs-mucins, resulting in modulation of infection efficiency. Utilizing human lung epithelial cells, we found that IAV associates with the cs-mucin MUC1 but not MUC13 or MUC16. Overexpression of MUC1 by epithelial cells or the addition of sialylated synthetic MUC1 constructs, reduced IAV infection in vitro. In addition, Muc1[SUP]-/-[/SUP] mice infected with IAV exhibited enhanced morbidity and mortality, as well as greater inflammatory mediator responses compared to wild type mice. This study implicates the cs-mucin MUC1 as a critical and dynamic component of the innate host response that limits the severity of influenza and provides the foundation for exploration of MUC1 in resolving inflammatory disease.Mucosal Immunology advance online publication, 22 March 2017; doi:10.1038/mi.2017.16.
PMID: 28327617 DOI: 10.1038/mi.2017.16
[h=1]The cell surface mucin MUC1 limits the severity of influenza A virus infection.[/h] McAuley JL[SUP]1[/SUP], Corcilius L[SUP]2[/SUP], Tan HX[SUP]1[/SUP], Payne RJ[SUP]2[/SUP], McGuckin MA[SUP]3[/SUP], Brown LE[SUP]1[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Cell surface mucin (cs-mucin) glycoproteins are constitutively expressed at the surface of respiratory epithelia where pathogens such as influenza A virus (IAV) gain entry into cells. Different members of the cs-mucin family each express a large and heavily glycosylated extracellular domain that towers above other receptors on the epithelial cell surface, a transmembrane domain that enables shedding of the extracellular domain, and a cytoplasmic tail capable of triggering signaling cascades. We hypothesized that IAV can interact with the terminal sialic acids presented on the extracellular domain of cs-mucins, resulting in modulation of infection efficiency. Utilizing human lung epithelial cells, we found that IAV associates with the cs-mucin MUC1 but not MUC13 or MUC16. Overexpression of MUC1 by epithelial cells or the addition of sialylated synthetic MUC1 constructs, reduced IAV infection in vitro. In addition, Muc1[SUP]-/-[/SUP] mice infected with IAV exhibited enhanced morbidity and mortality, as well as greater inflammatory mediator responses compared to wild type mice. This study implicates the cs-mucin MUC1 as a critical and dynamic component of the innate host response that limits the severity of influenza and provides the foundation for exploration of MUC1 in resolving inflammatory disease.Mucosal Immunology advance online publication, 22 March 2017; doi:10.1038/mi.2017.16.
PMID: 28327617 DOI: 10.1038/mi.2017.16