KHSRP and cystic fibrosis: Further, the RNA-binding protein tristetraprolin (TTP), a zinc finger protein also known as ZFP36, suppresses miR-155 expression in CF lung epithelial cells via upregulation of miR-1, while KH-type splicing regulatory protein (KSRP), the KH domain-containing splicing factor, upregulates miR-155 via promoting enhanced biogenesis (Bhattacharyya et al., 2013).