Reference Detail

Ref Type

Journal Article

PMID

(31335987)

Authors

Roldan-Romero JM, Beuselinck B, Santos M, Rodriguez-Moreno JF, Lanillos J, Calsina B, Gutierrez A, Tang K, Lainez N, Puente J, Castellano D, Esteban E, Climent MA, Arranz JA, Albersen M, Oudard S, Couchy G, Caleiras E, Montero-Conde C, Cascón A, Robledo M, Rodríguez-Antona C, García-Donas J, null null

Title

PTEN expression and mutations in TSC1, TSC2 and MTOR are associated with response to rapalogs in patients with renal cell carcinoma.

Journal	Vol	Issue	Date	Pages	Journal Short Title
International journal of cancer	146	5	2020 03 01	1435-1444	Int J Cancer

URL

Abstract Text

The mammalian target of rapamycin (mTOR) pathway inhibitors are key drugs for the treatment of many tumor types, however, there are no predictive biomarkers in clinical use. Here, we performed a molecular and immunohistochemical characterization of key mTOR pathway components in a series of 105 renal cell carcinoma patients treated with rapalogs, aimed at identifying markers of treatment response. Mutational analysis in MTOR, TSC1 and TSC2 was performed through targeted next-generation sequencing (NGS), and immunohistochemistry (IHC) was performed for PTEN, pAKT, pS6K1, pS6 and p21. Among patients with NGS data, 11 of 87 (13%) had mTOR pathway mutations (8 in MTOR, 1 in TSC1 and 2 in TSC2). When comparing the molecular data to the response of the patients, we found that partial response was more frequent in cases with mTOR pathway mutations than in those without mutations (odds ratio [OR] = 0.08, 95% confidence interval [CI] = 0.008-0.79, p = 0.030 univariate; p = 0.038 multivariable). Regarding IHC, negative PTEN staining was detected in 58% of the tumors, and it was more frequent in rapalog responder patients (OR = 0.24, 95% CI = 0.065-0.86, p = 0.029 univariate; p = 0.029 multivariable). Mutations and PTEN IHC were not mutually exclusive events and its combination improved response prediction (OR = 0.16, 95% CI = 0.04-0.62, p = 0.008 univariate; p = 0.013 multivariable). The staining of other proteins did not show and association with response and no association with PFS was observed in unselected patients. In conclusion, our findings suggest that mTOR pathway mutations, negative PTEN IHC and their combination are potential markers of rapalog response.

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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
PTEN negative	renal cell carcinoma	predicted - sensitive	Temsirolimus	Clinical Study - Cohort	Actionable	In a clinical study, negative PTEN IHC staining were detected more frequently in patients with renal cell carcinoma who responded to treatment with Afinitor (everolimus) or Torisel (temsirolimus) (odds ratio = 0.24, p=0.029) than those who did not respond (PMID: 31335987).	31335987
PTEN negative	renal cell carcinoma	predicted - sensitive	Everolimus	Clinical Study - Cohort	Actionable	In a clinical study, negative PTEN IHC staining were detected more frequently in patients with renal cell carcinoma who responded to treatment with Afinitor (everolimus) or Torisel (temsirolimus) (odds ratio = 0.24, p=0.029) than those who did not respond (PMID: 31335987).	31335987