2020
DOI: 10.26434/chemrxiv.12034980
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The Role of Folic Acid in the Management of Respiratory Disease Caused by COVID-19

Abstract: <p></p><p><b>Entrance of coronavirus into cells happens through the spike proteins on the virus surface, for which the spike protein should be cleaved into S1 and S2 domains. This cleavage is mediated by furin, which can specifically cleav</b><b>e</b><b> Arg-X-X-Arg↓ sites of the substrates. Furin, a member of proprotein convertases family, is moved from the trans-Golgi network to the cell membrane and activates many precursor proteins. A number of pathological c… Show more

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Cited by 44 publications
(38 citation statements)
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“…Some previous studies have suggested folic acid as an adjunctive therapy ( Sharma, 2020 ). Besides immune-boosting properties, folic acid can be used as an inhibitor of furin activity, an enzyme responsible for SARS-CoV-2 spike protein cleavage ( Sheybani et al, 2020 ). Therefore, it can be considered as a prophylactic or therapeutic candidate for COVID-19, especially in initial phases.…”
Section: Discussionmentioning
confidence: 99%
“…Some previous studies have suggested folic acid as an adjunctive therapy ( Sharma, 2020 ). Besides immune-boosting properties, folic acid can be used as an inhibitor of furin activity, an enzyme responsible for SARS-CoV-2 spike protein cleavage ( Sheybani et al, 2020 ). Therefore, it can be considered as a prophylactic or therapeutic candidate for COVID-19, especially in initial phases.…”
Section: Discussionmentioning
confidence: 99%
“…Thus, suboptimal levels of Folate intake may trigger imbalances in T and NK cell mediated immune responses [92] and decrease amount of antibody production [91]. Although scientific evidence is still scarce, Folate could play a role in COVID-19 management: it may participate in furin inhibition activity (a convertase involved in SARS-CoV-2 spike protein cleavage) and consequently prevent this necessary step for the virus' access into host cells [93]. Furthermore, homocysteine metabolic pathway disruption by COVID-19 infection has recently been proposed as one of the mechanisms that lead infected cells to death [94].…”
Section: Folatementioning
confidence: 99%
“…The folic acid and its derivates such as tetrahydrofolic acid and 5-methyl tetrahydrofolate may interfere with the cell entry of SARS-CoV 2 (63) via inhibition of furin protein that has essential for COVID-19 progression (159). In addition to the ACE2 protein, S-glycoprotein, some of the proteases (M pro and PL pro ), RNA dependent RNA polymerase, and Nsp15 promote the cellular entry of SARS-CoV 2 (63, 160).…”
Section: B Vitaminsmentioning
confidence: 99%