FOXJ1

FOXJ1, which is a forkhead transcription factor, has been previously studied mostly as a ciliary transcription factor. FOXJ1 is essential in multiple physiological processes, especially ciliogenesis, embryonic development, and spontaneous autoimmunity inhibition. FOXJ1 also plays a role in malignancy. FOXJ1 is reduced or hypermethylated in gastric cancer, ovarian cancer, breast cancer, aggressive ependymoma, and choroid plexus tumors, and its decreased expression is associated with poor prognosis, indicating its role as a novel tumor suppressor. However, in hepatocellular carcinoma and clear-cell renal cell carcinoma, FOXJ1 is overexpressed and the expression levels correlate with poor prognosis[1].