id author title date pages extension mime words sentences flesch summary cache txt cord-303399-s1hbpvn7 Straus, Marco R. SPINT2 inhibits proteases involved in activation of both influenza viruses and metapneumoviruses 2019-08-31 .txt text/plain 6424 466 64 SPINT2 treatment resulted in the cleavage and fusion inhibition of full-length influenza A/CA/04/09 (H1N1) HA, A/Aichi/68 (H3N2) HA, A/Shanghai/2/2013 (H7N9) HA and HMPV F when activated by trypsin, recombinant matriptase or KLK5. https://doi.org/10.1101/752592 doi: bioRxiv preprint vivo situation and requires validation by expressing the full-length fusion proteins in a cell culture model 3 to test cleavage and cleavage inhibition of the respective protease (39). To test SPINT2-mediated cleavage inhibition of full-length HA we expressed the HAs of A/CA/04/09 9 (H1N1), A/x31 (H3N2) and A/Shanghai/2/2013 (H7N9) in 293T cells and added recombinant matriptase or 10 KLK5 protease that were pre-incubated with 10nM or 500nM SPINT2. To understand whether SPINT2 was able to inhibit or reduce the growth of virus in a cell culture 20 model over the course of 48 hours we transfected cells with human TMPRSS2 and human matriptase, two 21 major proteases that have been shown to be responsible for the activation of distinct influenza A subtype 22 ./cache/cord-303399-s1hbpvn7.txt ./txt/cord-303399-s1hbpvn7.txt