id author title date pages extension mime words sentences flesch summary cache txt cord-330121-eadu2ba3 Gudmundsdottir, Ágústa Inactivation of SARS‐CoV‐2 and HCoV‐229E in vitro by ColdZyme® a medical device mouth spray against common cold 2020-09-25 .txt text/plain 1628 114 58 It contains glycerol and minor amounts of purified cold-adapted trypsin 5 The entry of coronaviruses into host cells is mediated by the spike (S) glycoprotein that forms homo-trimers protruding from the virus surface 11 . Based on the results presented in this study, CZ-MD was found to inactivate SARS-CoV-2 (98.3%) and HCoV-229E (99.9%) in vitro (Table I) Coronaviruses cause about one-third of the common cold cases 4 Entry of coronaviruses into susceptible cells requires receptor-binding of the S protein and it's proteolytic processing by host cell proteases that occurs in a concerted action to promote virus-cell fusion 3 . However, the in vitro study presented here clearly demonstrates that the CZ-MD (containing cod trypsin) inactivates SARS-CoV-2 and HCoV-229E. Although the in vitro results presented cannot be directly translated into clinical efficacy, the study indicates that CZ-MD might offer a protective barrier against coronaviruses such as SARS-CoV-2 and a decreased risk of COVID-19 transmission. ./cache/cord-330121-eadu2ba3.txt ./txt/cord-330121-eadu2ba3.txt