Weizmann Institute study finds Viagra may block cancer metastasis
Researchers at the Weizmann Institute of Science, led by Ayelet Erez and Yarden Ariav, published a study in Cancer Research showing that sildenafil (Viagra) can inhibit cancer metastasis. The drug blocks the enzyme phosphodiesterase‑5 (PDE5), raising intracellular cGMP levels. Elevated cGMP interferes with the NPC1 protein, reducing cholesterol transport inside tumor cells and limiting their ability to migrate and form new tumors.
Laboratory tests on human and mouse tumor cells demonstrated that this metabolic disruption makes highly migratory cancer cells especially vulnerable. The anti‑metastatic effect was further enhanced when sildenafil was combined with statins, which also lower cholesterol availability. A retrospective analysis of millions of patient records indicated higher survival rates for cancer patients who had used sildenafil, with an even stronger benefit for those also taking statins. The study involved Israeli and U.S. researchers and suggests a potential new therapeutic avenue, though clinical use has not yet been established.
Entities: Ayelet Erez · Cholesterol · NPC1 protein · Sildenafil (Viagra) · Sildenafil (Viagra) · Statins · Weizmann Institute of Science · Yarden Ariav · cancer metastasis
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [● 7 SOURCES] Elevated cGMP interferes with NPC1 protein, reducing cholesterol transport in tumor cells. (Weizmann Institute study)
- [● 7 SOURCES] Sildenafil inhibits phosphodiesterase type 5 (PDE5), raising intracellular cGMP levels. (Weizmann Institute study)
- [● 7 SOURCES] The anti‑metastatic effect is enhanced when sildenafil is combined with statins. (Weizmann Institute study)
- [● 7 SOURCES] Retrospective clinical data indicated higher survival rates for cancer patients who used sildenafil, especially with statins. (Weizmann Institute study)
- [● 7 SOURCES] Laboratory tests on animal and human tumor cells showed increased susceptibility to sildenafil‑induced metabolic disruption. (Weizmann Institute study)
- [● 7 SOURCES] Reduced cholesterol availability hampers tumor cell migration and metastasis formation. (Weizmann Institute study)
- [● 7 SOURCES] The study was conducted by the Weizmann Institute of Science in Israel with U.S. researchers and published in Cancer Research. (Weizmann Institute study)
- [● 7 SOURCES] Researchers identified a mechanism by which sildenafil can inhibit cancer cell metastasis. (Weizmann Institute study)