Kcnj14, also known as Kir2.4, encodes an inwardly rectifying potassium channel. This channel is involved in regulating membrane potential, and is associated with multiple biological processes. For example, in colonic muscles, it contributes to the regulation of resting potentials and excitability through a Ba²⁺ -sensitive, inwardly rectifying K⁺ conductance, likely formed by heterotetramers of Kir2 gene products [3].

In cancer research, knockdown of Kcnj14 significantly inhibited the proliferation and migration of colorectal cells. Kcnj14 expression was increased in colorectal cancer (CRC) tissues and cell lines, reducing patients' overall survival time. It was also found to be dysregulated in various cancers, and was linked to RNA and DNA stemness, immunological checkpoints, suppressor cells, tumour mutation burden, microsatellite instability, neoantigen, and programmed death ligand 1. In CRC, its expression was related to immune cell infiltration and the mTOR signalling pathway [1,2].

In conclusion, Kcnj14 plays a significant role in maintaining the normal physiological function of colonic muscles by regulating membrane potential. In addition, its abnormal expression is closely related to the development and progression of cancers, especially CRC. The study of Kcnj14 knockdown in CRC cells provides valuable insights into its role in cancer, potentially offering new targets for cancer treatment.