Mutations of the PDE5A gene confer a survival advantage in patients with colon cancer

Sildenafil is a small molecule that inhibits PDE5. The study of Islam et al validates PDE5 as a colon cancer chemoprevention target in mice (2), as did a second mouse study (3). Our analysis of TCGA data corroborates this finding in humans. Further studies are needed to determine whether sildenafil or other PDE5 inhibitors might be colon cancer preventives or treatments.

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