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    Browsing Dr. Erik Lillehoj by Publication Date 
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    • Dr. Erik Lillehoj
    • Browsing Dr. Erik Lillehoj by Publication Date
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    • Dr. Erik Lillehoj
    • Browsing Dr. Erik Lillehoj by Publication Date
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    Browsing Dr. Erik Lillehoj by Publication date

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        Involvement of PI3K, Src, and Grb2 in MUC1 Signaling

        Lillehoj, Erik P.; Wang, Honghe; Peng, Guihong; Kim, K. Chul (2003)
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        Respiratory MUC1 Mucin Interacts with Calcium-Modulating Cyclophilin Ligand (CAML)

        Lillehoj, Erik P.; Guang, Wei; Kim, K. Chul (2008)
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        Pseudomonas aeruginosa Flagellins Induce Interleukin-8 Production in Airway Epithelial Cells

        Beasley, Kathleen; Lillehoj, Erik P. (2008)
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        MUC1 Mucin Inhibits Airway Epithelial Barrier Formation Through a beta Catenin Dependent Mechanism

        Lillehoj, Erik P.; Cabrera, Whitney; Kim, K. Chul (2008)
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        Expression of MUC1 Mucin Increases Intracellular Calcium Levels Through a CAML-Dependent Mechanism

        Guang, Wei; Kim, K. Chul; Lillehoj, Erik P. (2009)
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        Pseudomonas aeruginosa Isolates from Multiple Clinical Settings Induce Equal Levels of IL-8 Production by Airway Epithelial Cells

        Beasley, Kathleen; Guang, Wei; Kim, K. Chul; Lillehoj, Erik P. (2009)
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        Intercellular Adhesion Molecules Expressed by Normal, Cystic Fibrosis, and Cancer Airway Epithelial Cell Lines

        Molock, Keena; Guang, Wei; Kim, K. Chul; Lillehoj, Erik P. (2009)
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        Role of Muc1 in Helicobacter pylori Gastric Mucosal Inflammation

        Guang, Wei; Ding, Hua; Czinn, Steven J.; Kim, K. Chul; Blanchard, Thomas G.; Lillehoj, Erik P. (2010)
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        NEU1 Sialidase Regulates MUC1-Dependent Bacterial Adhesion to and Invasion of Human Airway Epithelia

        Lillehoj, Erik P.; Guang, Wei; Hyun, Sang Won; Puche, Adam C.; Goldblum, Simeon E. (2013)
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        Human Airway Epithelia Express Catalytically-Active NEU3 Sialidase

        Hyun, Sang Won; Lillehoj, Erik P.; Feng, Chiguang (2013)
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        NEU1 Sialidase Increases Shedding of MUC1 Ectodomain as a Decoy Receptor for Pseudomonas aeruginosa, Decreasing Bacterial Adhesion to Human Airway Epithelia

        Lillehoj, Erik P.; Guang, Wei; Hyun, Sang Won; Luzina, Irina G.; Atamas, Sergei P.; Verceles, Avelino C.; Goldblum, Simeon E. (2014)
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        NEU1 Sialidase Promotes MUC1 Ectodomain Release from Human Airway Epithelial Cells as a Soluble Decoy Receptor that Blocks Pseudomonas aeruginosa Adhesion

        Lillehoj, Erik P.; Guang, Wei; Hyun, Sang Won; Luzina, Irina G.; Atamas, Sergei P.; Verceles, Avelino C.; Goldblum, Simeon E. (2015)
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        Pseudomonas aeruginosa Flagellin Regulates NEU1 Sialidase-Responsive, MUC1 Ectodomain-Dependent Bacterial Adhesion to and Invasion into Human Airway Epithelial Cells

        Lillehoj, Erik P.; Hyun, Sang Won; Guang, Wei; Goldblum, Simeon E. (2015)
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        The Human NEU1-Selective Sialidase Inhibitor, GSC-649, Blocks NEU1-Mediated Bioactivities in Human Airway Epithelia and Lung Microvascular Endothelia

        Hyun, Sang Won; Liu, Anguo; Magesh, Sadagopan; Ishida, Hideharu; Kiso, Makoto; Cross, Alan S.; Lillehoj, Erik P.; Goldblum, Simeon E. (2015)
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        Deglycosylated MUC1 Ectodomain for the Diagnosis and Treatment of Pseudomonas aeruginosa Lung Infections

        Lillehoj, Erik P.; Verceles, Avelino C.; Guang, Wei; Hyun, Sang Won; Liu, Anguo; Goldblum, Simeon E. (2016)
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        Neuraminidase-1 Desialylates the MUC1 Ectodomain to Release a Decoy Receptor that Protects against Lethal Pseudomonas aeruginosa Lung Infection

        Lillehoj, Erik P.; Guang, Wei; Hyun, Sang Won (2020)
        Background: Pseudomonas aeruginosa (Pa) is a major opportunistic pathogen of human airways, but the host response to infection is incompletely understood. Epithelial cells lining the airways express numerous surface receptors that recognize infectious agents such as Pa. One such receptor, MUC1, recognizes Pa flagellin, the major structural protein of the bacterial flagellum. MUC1 consists of an NH2-terminal, highly O-glycosylated ectodomain (MUC1-ED) attached to the cell surface through a membrane-spanning domain. MUC1-ED is proteolytically processed and shed from the epithelial cell surface following cleavage at a juxtamembranous Gly-Ser peptide bond. We previously demonstrated that stimulation of human airway epithelial cells with Pa flagellin increased MUC1-ED shedding in vitro (Lillehoj et al., J. Biol. Chem. 290:18316, 2015). Using an intact, physiologically relevant murine model of Pa pneumonia, here we asked whether Pa and its flagellin might also stimulate NEU1-dependent MUC1-ED desialylation in vivo to release a hyperadhesive decoy receptor that provides a novel, protective host response to Pa lung infection. Results: Intranasal administration of e5.0x103 colony forming units of Pa strain K (PAK) to BALB/c mice increased MUC1-ED shedding into the bronchoalveolar compartment. MUC1-ED levels increased as early as 12 h, peaked at 24-48 h, reaching up to a 7.8-fold increase, and decreased by 72 h. The a-type flagellin-expressing PAK strain and the b-type flagellin-expressing PAO1 strain stimulated comparable levels of MUC1-ED shedding. A flagellindeficient isogenic PAK mutant provoked dramatically reduced MUC1-ED shedding compared with the wild-type strain, and purified flagellin recapitulated the wild-type effect. In lung tissues, Pa increased MUC1-ED desialylation by peanut agglutinin lectin blotting. NEU1-selective sialidase inhibition with C9-BA-DANA, or use of a catalytically-inactive NEU1-G68V mutant, protected against Pa-induced MUC1-ED desialylation and shedding. MUC1-ED inhibition of in vitro Pa adhesion and flagellin binding to airway epithelial cells was localized to its protein backbone and not to its glycans. Finally, co-administration of Pa with human recombinant (r)MUC1-ED expressed in E. coli diminished lung and BALF bacterial burden, proinflammatory cytokine levels, and pulmonary leukostasis, and enhanced 5-day survival from 0% to 75%. Conclusions: These combined data indicate that Pa flagellin provokes NEU1-mediated airway shedding of MUC1-ED as a decoy receptor that protects against lethal Pa lung infection. Human rMUC1-ED might someday be harnessed as a therapeutic intervention to target Pa lung infections, including those associated with multi-drug resistant organisms.
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        Desialylated Host-Derived MUC1 Ectodomain and Bacterially-Derived Flagellin are Biomarkers for Airway Colonization and Infection with Pseudomonas aeruginosa in Mechanically Ventilated and Cystic Fibrosis Patients

        Lillehoj, Erik P; Verceles, Avelino C.; Bhat, Pavan; Nagaria, Zain; Martin, Destiny; Patel, Harsh; Ntem-Mensah, Afua; Hyun, Sang Won; Hahn, Andrea; Cross, Alan S; et al. (2020-05)
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        NEU1 Sialidase Associates with the MUC1 Cytoplasmic Domain and not the MUC1 Ectodomain

        Lillehoj, Erik P.; Hyun, Sang Won; Piepenbrink, Kurt H.; Guang, Wei; Goldblum, Simeon E.
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