CMTM7 and insomnia: Tumor suppressor genes, CMTM7 (Li et al., 2014b), NKAPL (Okuda et al., 2015) and ATM (encoding ATM checkpoint kinase) (Shiloh and Ziv, 2013) may allude to aberrant DNA damage responses contributing to insomnia, and indeed, there are several reports of links between DNA damage and sleep in the literature (Carroll et al., 2016; Zada et al., 2021).