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Ref Type Journal Article
PMID (21520111)
Authors Hu M, Ekshyyan O, Herman Ferdinandez L, Rong X, Caldito G, Nathan CO
Title Efficacy and comparative effectiveness of sirolimus as an anticancer drug.
Journal Vol Issue Date Pages Journal Short Title
The Laryngoscope 121 5 2011 May 978-82 Laryngoscope
URL
Abstract Text To evaluate antitumor efficacy of the generic mammalian target of rapamycin (mTOR) inhibitor sirolimus in preclinical animal models of head and neck squamous cell carcinoma (HNSCC) and compare its effects with those of the patented analogue temsirolimus.In vivo study.To develop xenograft established tumor model (ETM) of HNSCC, FaDu cells were injected subcutaneously into nude mice. When tumors reached 50 to 60 mm(3), mice were randomized into five groups and treated daily intraperitoneally with sirolimus at various doses for 5 days per week for 3 weeks. Tumor volumes were measured. The results were compared with historical data on temsirolimus effects. In the minimal residual disease (MRD) model, surgical wounds were created and FaDu cells implanted. After 72 hours, animals were randomized into two groups and were injected intraperitoneally with 0 or 5 mg/kg sirolimus for 5 days per week for 30 days.In the ETM, sirolimus significantly inhibited tumor growth (P < .01), although there was no overall significant difference in tumor growth inhibition between sirolimus and temsirolimus. In the MRD model, sirolimus significantly suppressed growth of tumors (P < .001) and improved survival compared with controls (P < .01). There was a significant decrease in pS6 expression, indicating mTOR inhibition.In this study, we demonstrate that the generic mTOR inhibitor sirolimus shows potent antitumor activity in HNSCC and produces comparable effects to the patent drug temsirolimus. Sirolimus has the potential of serving as an economic and comparative targeted agent to temsirolimus in the treatment of HNSCC.

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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