AUTHOR=Flores-Lovon Kevin , Ortiz-Saavedra Brando , Cueva-Chicaña Luis A. , Aperrigue-Lira Shalom , Montes-Madariaga Elizbet S. , Soriano-Moreno David R. , Bell Brett , Macedo Rodney 

TITLE=Immune responses in COVID-19 and tuberculosis coinfection: A scoping review

JOURNAL=Frontiers in Immunology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.992743

DOI=10.3389/fimmu.2022.992743

ISSN=1664-3224

ABSTRACT=<sec><title>Background and aim</title><p>Patients with COVID-19 and tuberculosis coinfection are at an increased risk of severe disease and death. We therefore sought to evaluate the current evidence which assessed the immune response in COVID-19 and tuberculosis coinfection</p></sec><sec><title>Methods</title><p>We searched Pubmed/MEDLINE, EMBASE, Scopus, and Web of Science to identify articles published between 2020 and 2021. We included observational studies evaluating the immune response in patients with tuberculosis and COVID-19 compared to patients with COVID-19 alone.</p></sec><sec><title>Results</title><p>Four cross-sectional studies (372 participants) were identified. In patients with asymptomatic COVID-19 and latent tuberculosis (LTBI), increased cytokines, chemokines, growth factors and humoral responses were found. In addition, patients with symptomatic COVID-19 and LTBI had higher leukocytes counts and less inflammation. Regarding patients with COVID-19 and active tuberculosis (aTB), they exhibited decreased total lymphocyte counts, CD4 T cells specific against SARS-CoV-2 and responsiveness to SARS-CoV-2 antigens compared to patients with only COVID-19.</p></sec><sec><title>Conclusion</title><p>Although the evidence is limited, an apparent positive immunomodulation is observed in patients with COVID-19 and LTBI. On the other hand, patients with COVID-19 and aTB present a dysregulated immune response. Longitudinal studies are needed to confirm these findings and expand knowledge.</p></sec>