Temsirolimus: in advanced renal cell carcinoma
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Updated: Jul 6, 2026

A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies
Published on: April 12, 2017
Dene Simpson1, Monique P Curran
1Wolters Kluwer Health, Adis, Auckland, New Zealand. demail@adis.co.nz
Abstract:
Temsirolimus, an ester of sirolimus (rapamycin), selectively inhibits the kinase mammalian target of rapamycin and consequently blocks the translation of cell cycle regulatory proteins and prevents the over expression of angiogenic growth factors. Patients with advanced renal cell carcinoma and a poor prognosis who received a once-weekly intravenous infusion of temsirolimus 25 mg experienced significant survival benefits compared with patients receiving standard interferon-alpha (IFNalpha) therapy (3-18 MU subcutaneously three times weekly) in a large phase III clinical study. Median overall survival was 10.9 versus 7.3 months, progression-free survival was 5.5 versus 3.1 months. Objective response rates were 8.6% in temsirolimus recipients versus 4.8% in IFNalpha recipients. Temsirolimus monotherapy recipients experienced significantly fewer grade 3 or 4 adverse events and had numerically fewer withdrawals for adverse events than patients receiving IFNalpha.
Insights
Temsirolimus significantly improved survival for advanced renal cell carcinoma patients compared to interferon-alpha. This mTOR inhibitor demonstrated better progression-free survival and fewer adverse events.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Advanced renal cell carcinoma (RCC) presents a poor prognosis.
- Current therapies like interferon-alpha (IFNalpha) have limitations.
- Targeting the mammalian target of rapamycin (mTOR) pathway is a therapeutic strategy.
Purpose of the Study:
- To evaluate the efficacy and safety of temsirolimus in patients with advanced RCC.
- To compare temsirolimus monotherapy against standard IFNalpha treatment.
Main Methods:
- A large phase III clinical study was conducted.
- Patients received either a once-weekly intravenous infusion of temsirolimus (25 mg) or subcutaneous IFNalpha (3-18 MU three times weekly).
- Survival outcomes, objective response rates, and adverse events were assessed.
Main Results:
- Temsirolimus showed significant survival benefits: median overall survival of 10.9 months vs. 7.3 months for IFNalpha.
- Progression-free survival was notably improved with temsirolimus (5.5 months vs. 3.1 months).
- Objective response rates were higher for temsirolimus (8.6%) than IFNalpha (4.8%), with fewer severe adverse events.
Conclusions:
- Temsirolimus monotherapy offers significant survival advantages for advanced RCC patients with poor prognosis.
- Temsirolimus is a well-tolerated treatment option with a favorable safety profile compared to IFNalpha.
- Targeting the mTOR pathway with temsirolimus is an effective strategy in advanced renal cell carcinoma treatment.
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