Home > Articles > Published articles > Mycobacterium manresensis induces trained immunity in vitro |
Date: | 2023 |
Abstract: | The COVID-19 pandemic posed a global health crisis, with new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants weakening vaccine-driven protection. Trained immunity could help tackle COVID-19 disease. Our objective was to analyze whether heat-killed Mycobacterium manresensis (hkMm), an environmental mycobacterium, induces trained immunity and confers protection against SARS-CoV-2 infection. To this end, THP-1 cells and primary monocytes were trained with hkMm. The increased secretion of tumor necrosis factor alpha (TNF-α), interleukin (IL)-6, IL-1β, and IL-10, metabolic activity, and changes in epigenetic marks suggested hkMm-induced trained immunity in vitro. Healthcare workers at risk of SARS-CoV-2 infection were enrolled into the MANRECOVID19 clinical trial (NCT04452773) and were administered Nyaditum resae (NR, containing hkMm) or placebo. No significant differences in monocyte inflammatory responses or the incidence of SARS-CoV-2 infection were found between the groups, although NR modified the profile of circulating immune cell populations. Our results show that M. manresensis induces trained immunity in vitro but not in vivo when orally administered as NR daily for 14 days. Biological sciences; Molecular biology; Immunology; Microbiology. |
Grants: | Ministerio de Ciencia e Innovación PID2020-117145RB-I00 European Commission. Horizon 2020 101046118 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-490/2021-SGR-01186 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021-SGR-00931 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-500/2021 Agència de Gestió d'Ajuts Universitaris i de Recerca SGR 00920 |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Biological sciences ; Molecular biology ; Immunology ; Microbiology |
Published in: | iScience, Vol. 26 (may 2023) , p. 106873, ISSN 2589-0042 |
28 p, 4.0 MB |