POU2F1 and prostate cancer: POU2F1 (OCT1) overexpression is associated with tumorigenesis in some studies (Vazquez‐Arreguin et al., 2018), with conflicting prognostic value described in literature: Some trials reported that overexpression of POU2F1 was associated with worse prognosis and aggressiveness in gastric, colon, and prostate cancers, among others.