KLF5 and cancer: Krupple-like factor 5 (KLF5) is a zinc-Finger transcription factor involved in many cellular functions such as differentiation, proliferation, migration, apoptosis and regulation of cancer stemness (Mori et al., 2009; Maehara et al., 2015; Hayashi et al., 2016; Ma et al., 2017; Li et al., 2018; Ma et al., 2018; Li et al., 2019).