Gwanghee Kim, Yoojin Lee, Jin Sun You, Wontae Hwang, Jeewon Hwang, Hwa Young Kim, Jieun Kim, Ara Jo, In Ho Park, Mohammed Ali, Jongsun Kim, Jeon-Soo Shin, Ho-Keun Kwon, Hyun Jik Kim, Sang Sun Yoon
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The recruitment of these immune cells resulted in the protection of the murine host against infection by <i>Pseudomonas aeruginosa</i>, a pathogenic bacterium. Interestingly, an AIT01-secreted protein identified as GAPDH, a well-known bacterial moonlighting protein, mediated this protective effect. Intranasal delivery of the purified GAPDH conferred significant resistance against other Gram-negative pathogens (<i>Klebsiella pneumoniae</i> and <i>Acinetobacter baumannii</i>) and influenza A virus. Our findings demonstrate the potential of a native nasal microbe and its secretory protein to enhance innate immune defense against airway infections. 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A Moonlighting Protein Secreted by a Nasal Microbiome Fortifies the Innate Host Defense Against Bacterial and Viral Infections.
Evidence suggests that the human respiratory tract, as with the gastrointestinal tract, has evolved to its current state in association with commensal microbes. However, little is known about how the airway microbiome affects the development of airway immune system. Here, we uncover a previously unidentified mode of interaction between host airway immunity and a unique strain (AIT01) of Staphylococcus epidermidis, a predominant species of the nasal microbiome. Intranasal administration of AIT01 increased the population of neutrophils and monocytes in mouse lungs. The recruitment of these immune cells resulted in the protection of the murine host against infection by Pseudomonas aeruginosa, a pathogenic bacterium. Interestingly, an AIT01-secreted protein identified as GAPDH, a well-known bacterial moonlighting protein, mediated this protective effect. Intranasal delivery of the purified GAPDH conferred significant resistance against other Gram-negative pathogens (Klebsiella pneumoniae and Acinetobacter baumannii) and influenza A virus. Our findings demonstrate the potential of a native nasal microbe and its secretory protein to enhance innate immune defense against airway infections. These results offer a promising preventive measure, particularly relevant in the context of global pandemics.
期刊介绍:
Immune Network publishes novel findings in basic and clinical immunology and aims to provide a medium through which researchers in various fields of immunology can share and connect. The journal focuses on advances and insights into the regulation of the immune system and the immunological mechanisms of various diseases. Research that provides integrated insights into translational immunology is given preference for publication. All submissions are evaluated based on originality, quality, clarity, and brevity