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Illini, O; Hochmair, MJ; Fabikan, H; Weinlinger, C; Tufman, A; Swalduz, A; Lamberg, K; Hashemi, SMS; Huemer, F; Vikstrom, A; Wermke, M; Absenger, G; Addeo, A; Banerji, S; Calles, A; Clarke, S; Di Maio, M; Durand, A; Duruisseaux, M; Itchins, M; Kaaranien, OS; Krenn, F; Laack, E; de Langen, AJ; Mohorcic, K; Pall, G; Passaro, A; Prager, G; Rittmeyer, A; Rothenstein, J; Schumacher, M; Woll, E; Valipour, A.
Selpercatinib in RET fusion-positive non-small-cell lung cancer (SIREN): a retrospective analysis of patients treated through an access program
THER ADV MED ONCOL. 2021; 13: 17588359211019675 Doi: 10.1177/17588359211019675 [OPEN ACCESS]
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Absenger Gudrun

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Introduction: Rearranged during transfection (RET) gene fusions are rare genetic drivers in non-small cell lung cancer (NSCLC). Selective RET-inhibitors such as selpercatinib have shown therapeutic activity in early clinical trials; however, their efficacy in the real-world setting is unknown. Methods: A retrospective efficacy and safety analysis was performed on data from RET fusion-positive NSCLC patients who participated in a selpercatinib access program (named patient protocol) between August 2019 and January 2021. Results: Data from 50 patients with RET fusion-positive advanced NSCLC treated with selpercatinib at 27 centers in 12 countries was analyzed. Most patients were Non-Asian (90%), female (60%), never-smokers (74%), with a median age of 65 years (range, 38-89). 32% of the patients had known brain metastasis at the time of selpercatinib treatment. Overall, 13 patients were treatment-naive, while 37 were pretreated with a median of three lines of therapy (range, 1-8). The objective response rate (ORR) was 68% [95% confidence interval (CI), 53-81] in the overall population. The disease control rate was 92%. The median progression-free survival was 15.6 months (95% CI, 8.8-22.4) after a median follow-up of 9 months. In patients with measurable brain metastases (n = 8) intracranial ORR reached 100%. In total, 88% of patients experienced treatment-related adverse events (TRAEs), a large majority of them being grade 1 or 2. The most common grade > 3 TRAEs were increased liver enzyme levels (in 10% of patients), prolonged QTc time (4%), abdominal pain (4%), hypertension (4%), and fatigue/asthenia (4%). None of patients discontinued selpercatinib treatment for safety reasons. No new safety concerns were observed, nor where there any treatment-related death. Conclusions: In this real-world setting, the selective RET-inhibitor selpercatinib demonstrated durable systemic and intracranial antitumor activity in RET fusion-positive NSCLC and was well tolerated.

Find related publications in this database (Keywords)
non-small cell lung cancer (NSCLC)
real-world data
RET gene fusions
targeted therapy
tyrosine kinase inhibitor (TKI)
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