Defining parameters that influence susceptibility and protection to murine respiratory beta-coronavirus MHV-1 infection

نویسندگان

چکیده

Abstract Patients infected with SARS-CoV-2 can experience variable susceptibility and sepsis-like immune dysfunction. Also, patients comorbidities such as previous septic events are more likely to be hospitalized succumb COVID19 complications. However, the extent which respiratory beta-coronavirus pathology is dose dependent produces dysregulation in an experimental murine model not completely defined. We utilized established SARS-like by infecting Murine Hepatitis Virus 1 (MHV-1) susceptible C3H/HeJ mice intranasally analyzed responses over time after primary and/or secondary challenges. Immunologically naïve C3H undergo pathological changes defined dose-dependent disease severity lung infiltrate/edema. MHV-infected also lymphopenia cytokine blood. Importantly, a low/surviving (5×10 2PFU) was identified that yielded no morbidity/mortality infection of hosts. this low provides antibody but CD4/CD8 circulatory T cell protection against lethal high MHV-1 re-challenge. In addition, while hosts history prior infections were resistant, survived surgical sepsis showed increased their sham controls. Together, these data define how dose, immunological status, influence outcome highly Supported grants from NIH (R35GM134880, T32AI007511)

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ژورنال

عنوان ژورنال: Journal of Immunology

سال: 2023

ISSN: ['1550-6606', '0022-1767']

DOI: https://doi.org/10.4049/jimmunol.210.supp.75.42