RT Journal Article T1 Gut Microbiota Dysbiosis in COVID-19: Modulation and Approaches for Prevention and Therapy A1 Martín Giménez, Virna Margarita A1 Modrego, Javier A1 Gómez Garre, María Dulce Nombre A1 Manucha, Walter A1 Heras Jiménez, Natalia De Las AB Inflammation and oxidative stress are critical underlying mechanisms associated with COVID-19 that contribute to the complications and clinical deterioration of patients. Additionally, COVID-19 has the potential to alter the composition of patients’ gut microbiota, characterized by a decreased abundance of bacteria with probiotic effects. Interestingly, certain strains of these bacteria produce metabolites that can target the S protein of other coronaviruses, thereby preventing their transmission and harmful effects. At the same time, the presence of gut dysbiosis can exacerbate inflammation and oxidative stress, creating a vicious cycle that perpetuates the disease. Furthermore, it is widely recognized that the gut microbiota can metabolize various foods and drugs, producing by-products that may have either beneficial or detrimental effects. In this regard, a decrease in short-chain fatty acid (SCFA), such as acetate, propionate, and butyrate, can influence the overall inflammatory and oxidative state, affecting the prevention, treatment, or worsening of COVID-19. This review aims to explore the current evidence regarding gut dysbiosis in patients with COVID-19, its association with inflammation and oxidative stress, the molecular mechanisms involved, and the potential of gut microbiota modulation in preventing and treating SARS-CoV-2 infection. Given that gut microbiota has demonstrated high adaptability, exploring ways and strategies to maintain good intestinal health, as well as an appropriate diversity and composition of the gut microbiome, becomes crucial in the battle against COVID-19. PB MDPI SN 1422-0067 YR 2023 FD 2023-07-31 LK https://hdl.handle.net/20.500.14352/104754 UL https://hdl.handle.net/20.500.14352/104754 LA eng NO Martín Giménez, V.M.; Modrego, J.; Gómez-Garre, D.; Manucha, W.; de las Heras, N. Gut Microbiota Dysbiosis in COVID-19: Modulation and Approaches for Prevention and Therapy. Int. J. Mol. Sci. 2023, 24, 12249. https://doi.org/10.3390/ijms241512249 NO Instituto de Salud Carlos III NO European Commission NO Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Argentina) DS Docta Complutense RD 8 abr 2025