Abstract
Purpose
Gemcitabine has been standard of care in advanced pancreatic adenocarcinomas (PC) for almost two decades. Randomized, primarily Japanese, studies have shown promising efficacy when combined with S-1 (GemS-1); however, no data are published in Caucasian patients. We report the first study with a combination of GemS-1 in an unselected cohort of Caucasian PC patients.
Methods
In this observational cohort study, we analyzed efficacy and toxicity prospectively.
Results
From July 2012 to July 2014, 64 patients received at least one cycle of GemS-1. 16 patients started therapy with gemcitabine and capecitabine (GemCap) but switched to GemS-1 after median 3 cycles of GemCap due to toxicity (hand-foot syndrome). 48 patients received GemS-1 as initial therapy. For the complete cohort, median age was 68 years (range 44–80); 22 patients (34%) had locally advanced PC; 42 patients (66%) had metastatic disease. Five patients had received prior adjuvant therapy with gemcitabine and 9 pts had received prior first-line therapy. The most common adverse event was fatigue (86%), however, only grade 3 in 3%. Five patients (8%) developed febrile neutropenia. Median PFS was 8.1 (95% CI 6.9–9.0) months and median OS was 11.7 (95% CI 10.7–13.1) months in the whole GemS-1 population. In the 48 patients starting with GemS-1, median PFS was 7.7 (95% CI 6.7–8.9) months and median OS was 11.5 (95% CI 9.7–12.3) months.
Conclusions
The combination of gemcitabine and S-1 is safe and associated with promising efficacy in a Caucasian population; however, this needs to be confirmed in prospective clinical trials.
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Per Pfeiffer: Symposia or lectures for Amgen, Bayer, Celgene, Merck-Serono, MSD, Nordic Drugs, Roche, Sanofi, Taiho. Stine Winther: Lectures for Nordic Drugs. Jon Kroll Bjerregaard: no conflict of interest. Katrine Rahbek Schonnemann: no conflict of interest. Mathilde Weisz Ejlsmark: no conflict of interest. Merete Krogh: no conflict of interest. Helle Anita Jensen: no conflict of interest.
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The registry setup is according to Danish Law for Clinical Research. It is approved by the Danish Data Protection Agency (j. no. 13/41743) and it complies with the 1964 Helsinki declaration and its later amendments.
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Winther, S.B., Bjerregaard, J.K., Schonnemann, K.R. et al. S-1 (Teysuno) and gemcitabine in Caucasian patients with unresectable pancreatic adenocarcinoma. Cancer Chemother Pharmacol 81, 573–578 (2018). https://doi.org/10.1007/s00280-018-3528-5
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DOI: https://doi.org/10.1007/s00280-018-3528-5