CTH and colitis: Rectal injection of the H2S donor, NaHS, protects Wistar rats from dinitrobenzene sulfonic acid colitis (Goyal et al. 2015) and daily intraperitoneal injections dampens DSS colitis in C57BL/6 mice (Qin et al. 2019); in this last study, the treatment with NaHS was not investigated in Cth-deficient mice, which exhibited increased colitis (Qin et al. 2019).