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RAndomized Clinical Trial Of NAfamostat Mesylate, A Potent Transmembrane Protease Serine 2 (TMPRSS2) Inhibitor, in Patients with COVID-19 Pneumonia

Seccia et al., Journal of Clinical Medicine, doi:10.3390/jcm12206618, RACONA, NCT04352400, Oct 2023
Mortality 67% Improvement Relative Risk Recovery, no WHO 2+ im.. 20% Nafamostat  RACONA  LATE TREATMENT  DB RCT Is late treatment with nafamostat beneficial for COVID-19? Double-blind RCT 14 patients in Italy (June 2021 - August 2022) Trial underpowered to detect differences c19early.org Seccia et al., J. Clinical Medicine, Oct 2023 Favorsnafamostat Favorscontrol 0 0.5 1 1.5 2+
RCT 15 hospitalized COVID-19 patients showing a positive safety profile with nafamostat mesylate treatment. While the study was underpowered to detect differences in efficacy, Bayesian analysis suggested a signal for potential benefit (69-88% probability that nafamostat is effective depending on prior assumptions). Authors note that nafamostat, as a potent TMPRSS2 inhibitor with anticoagulant properties, could theoretically prevent virus entry into cells and complications like disseminated intravascular coagulation in COVID-19 patients. The study was significantly limited by small sample size due to recruitment challenges.
Study covers TMPRSS2 inhibitors and nafamostat.
risk of death, 66.7% lower, RR 0.33, p = 1.00, treatment 0 of 7 (0.0%), control 1 of 7 (14.3%), NNT 7.0, relative risk is not 0 because of continuity correction due to zero events (with reciprocal of the contrasting arm).
risk of no recovery, 20.0% lower, RR 0.80, p = 1.00, treatment 4 of 7 (57.1%), control 5 of 7 (71.4%), NNT 7.0, no improvement in WHO score of 2+ points.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Seccia et al., 19 Oct 2023, Double Blind Randomized Controlled Trial, placebo-controlled, Italy, peer-reviewed, 15 authors, study period June 2021 - August 2022, trial NCT04352400 (history) (RACONA). Contact: gianpaolo.rossi@unipd.it (corresponding author), teresamaria.seccia@unipd.it, tungalagtamir.shagjaa@studenti.unipd.it, sangaviola.md@gmail.com, margherita.morpurgo@unipd.it, sonia.faoro@aopd.veneto.it, francesca.venturini@aopd.veneto.it, girolama.iadicicco@aopd.veneto.it, sara.lococo@aopd.veneto.it, maria.mazzitelli@aopd.veneto.it, filippo.farnia@gmail.com, paola.fioretto@unipd.it, yusuke.kob@live.jp, dario.gregori@unipd.it.
RAndomized Clinical Trial Of NAfamostat Mesylate, A Potent Transmembrane Protease Serine 2 (TMPRSS2) Inhibitor, in Patients with COVID-19 Pneumonia
Teresa Maria Seccia, Tungalagtamir Shagjaa, Margherita Morpurgo, Brasilina Caroccia, Viola Sanga, Sonia Faoro, Francesca Venturini, Girolama Iadicicco, Sara Lococo, Maria Mazzitelli, Filippo Farnia, Paola Fioretto, Yusuke Kobayashi, Dario Gregori, Gian Paolo Rossi
Journal of Clinical Medicine, doi:10.3390/jcm12206618
Even though SARS-CoV-2 was declared by WHO as constituting no longer a public health emergency, the development of effective treatments against SARS-CoV-2 infection remains a critical issue to prevent complications, particularly in fragile patients. The protease inhibitor nafamostat, currently used in Japan and Korea for pancreatitis, owing to its anticoagulant properties for disseminated intravascular coagulation (DIC), is appealing for the treatment of COVID-19 infection, because it potently inhibits the transmembrane protease serine 2 (TMPRSS2) that, after virus binding to ACE-2, allows virus entry into the cells and replication. Moreover, it could prevent the DIC and pulmonary embolism frequently associated with COVID-19 infection. The goal of the RAndomized Clinical Trial Of NAfamostat (RACONA) study, designed as a prospective randomized, double-blind placebo-controlled clinical trial, was to investigate the efficacy and safety of nafamostat mesylate (0.10 mg/kg/h iv for 7 days), on top of the optimal treatment, in COVID-19 hospitalized patients. We could screen 131 patients, but due to the predefined strict inclusion and exclusion criteria, only 15 could be randomized to group 1 (n = 7) or group 2 (n = 8). The results of an ad interim safety analysis showed similar overall trends for variables evaluating renal function, coagulation, and inflammation. No adverse events, including hyperkalemia, were found to be associated with nafamostat. Thus, the RACONA study showed a good safety profile of nafamostat, suggesting that it could be usefully used in COVID-19 hospitalized patients.
Conflicts of Interest: The authors declare no conflict of interest.
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DOI record: { "DOI": "10.3390/jcm12206618", "ISSN": [ "2077-0383" ], "URL": "http://dx.doi.org/10.3390/jcm12206618", "abstract": "<jats:p>Even though SARS-CoV-2 was declared by WHO as constituting no longer a public health emergency, the development of effective treatments against SARS-CoV-2 infection remains a critical issue to prevent complications, particularly in fragile patients. The protease inhibitor nafamostat, currently used in Japan and Korea for pancreatitis, owing to its anticoagulant properties for disseminated intravascular coagulation (DIC), is appealing for the treatment of COVID-19 infection, because it potently inhibits the transmembrane protease serine 2 (TMPRSS2) that, after virus binding to ACE-2, allows virus entry into the cells and replication. Moreover, it could prevent the DIC and pulmonary embolism frequently associated with COVID-19 infection. The goal of the RAndomized Clinical Trial Of NAfamostat (RACONA) study, designed as a prospective randomized, double-blind placebo-controlled clinical trial, was to investigate the efficacy and safety of nafamostat mesylate (0.10 mg/kg/h iv for 7 days), on top of the optimal treatment, in COVID-19 hospitalized patients. We could screen 131 patients, but due to the predefined strict inclusion and exclusion criteria, only 15 could be randomized to group 1 (n = 7) or group 2 (n = 8). The results of an ad interim safety analysis showed similar overall trends for variables evaluating renal function, coagulation, and inflammation. No adverse events, including hyperkalemia, were found to be associated with nafamostat. 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Late treatment
is less effective
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