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Ref Type Journal Article
PMID (8620483)
Authors Bernhard EJ, Kao G, Cox AD, Sebti SM, Hamilton AD, Muschel RJ, McKenna WG
Title The farnesyltransferase inhibitor FTI-277 radiosensitizes H-ras-transformed rat embryo fibroblasts.
Abstract Text Many tumor cells have a greater resistance to ionizing radiation than their normal counterparts, suggesting that the development of drugs that can reduce that radioresistance would potentiate the efficacy of radiation therapy. Because activated H-ras expression has been shown to markedly increase radiation resistance in some transformed cells, the inactivation of H-ras would then be predicted to radiosensitize these tumor cells, while leaving normal cells unaffected. H-ras depends for activity upon farnesylation, which can be blocked by farnesylation inhibitors, including the compound FTI-277. In keeping with this prediction, inhibition of H-ras processing using FTI-277 resulted in higher levels of apoptosis after irradiation and increased radiosensitivity in H-ras-transformed rat embryo cells but did not affect control cells. These experiments suggest that farnesylation inhibitors may prove clinically useful as radiosensitizers of tumors that depend on ras function.


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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
HRAS wild-type cancer predicted - sensitive FTI-277 Preclinical Actionable In a preclinical study, the farnesyltransferase inhibitor FTI-277 sensitized Hras transformed rat fibroblasts to radiation therapy (PMID: 8620483). 8620483