The treatment regime was ineffective in suppressing SARS-CoV-2 infection in K18-hACE2 mice. Overall, animal studies demonstrated the protective age- and sex-dependent antiviral efficacy of DFMO and Sulindac against SARS-CoV-2.
In addition, enhancement of p21, Bax, and caspases; downregulation of Ki-67, VEGF, and β-catenin; and modulation of iNOS, COX-2, and ODC activities in colonic tumors were observed. These observations show that a lower-dose of DFMO and Sulindac significantly enhanced CRC chemopreventive efficacy when compared to NO-Sulindac alone, and the combination of DFMO and NO-Sulindac was modestly efficacious as compared to DFMO alone.