Abstract
AimsThymic carcinoma is a rare epithelial tumor, for which, optimal pharmacotherapeutic methods have not yet been established. To develop new drug treatments for thymic carcinoma, we investigated the effects of fluvastatin-mediated pharmacological inhibition of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR) on thymic carcinoma. Main methodsThymic carcinoma tissue was surgically excised and HMGCR expression was assessed by immunohistochemistry. Ty82 human thymic carcinoma cells were treated with fluvastatin (1–10 μM) and their growth was monitored. Key findingsHMGCR was expressed on carcinoma cells but not on normal epithelial cells in thymic tissue. Inhibition of HMGCR by fluvastatin suppressed cell proliferation and induced the death of Ty-82 human thymic carcinoma cells. Fluvastatin mediated its antitumor effects by blocking the production of geranylgeranyl-pyrophosphate (GGPP), an isoprenoid that is produced from mevalonate and binds to small GTPases, which promotes cell proliferation. SignificanceFluvastatin showed marked antitumor effects on thymic carcinoma. The results suggest that the statin has clinical benefits in thymic carcinoma management.
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