Journal
TRANSPLANT IMMUNOLOGY
Volume 70, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.trim.2021.101495
Keywords
Cytokines produced; Immune responses; T helper type; Viral infections; SARS-CoV-2
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Cytokines produced by T helper cells play crucial roles in host defense against viruses, with Th1 cells essential for defense against intracellular pathogens and Th2 cells critical for parasite elimination. Diseases caused by SARS-CoV-2 and H1N1 influenza have led to global epidemics, with pulmonary immunopathology being a leading cause of mortality. Inadequate or excessive levels of specific cytokines can have adverse effects on the body during these viral infections.
Cytokines produced by T helper cells (Th cells) have essential roles in the body's defense against viruses. Type 1 T helper (Th1) cells are essential for the host defense toward intracellular pathogens while T helper type 2 (Th2) cells are considered to be critical for the helminthic parasites' elimination swine-origin influenza A (H1N1) virus, a disease led to an epidemic in 2009 and rapidly spread globally via human-to-human transmission. Coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has caused a global pandemic in 2020 and is a serious threat to the public health. Pulmonary immunopathology is the leading cause of death during influenza and SARS-CoV-2 epidemics and pandemics. Influenza and SARS-CoV2 cause high levels of cytokines in the lung. Both inadequate levels and high levels of specific cytokines can have side effects. In this literature review article, we want to compare the Th1 and Th2 cells responses in SARS-CoV-2 and H1N1.
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