Abstract
Background
Patients with metastatic pancreatic cancer refractory to first-line chemotherapy (CTx) have few treatment options. It is unclear what kind of patients could be brought about survival benefit by 2nd-line CTx after refractory to gemcitabine + nab-PTX (GnP) or FOLFIRINOX.
Methods
This analysis was conducted as part of a multicenter retrospective study of GnP or FOLFIRINOX in patients with metastatic pancreatic cancer. Excluding censored cases, 156 and 77 patients, respectively, received second-line chemotherapy (CTx) and best supportive care (BSC). Using prognostic factors for post-discontinuation survivals (PDSs) at the first-line determination in multivariate analysis, we developed a scoring system to demonstrate the benefit of second-line CTx.
Results
The second-line CTx group had a median PDS of 5.2 months, whereas the BSC group had a median PDS of 2.7 months (hazard ratio 0.42; 95% confidence interval [CI] 0.31–0.57; p < 0.01). According to the Cox regression model, serum albumin levels below 3.5 g/dL, and CA19-9 levels above 1000 U/mL were independent prognostic factors (p < 0.01). Serum albumin (≥ and < 3.5 g/dL allotted to scores 0 and 1) and CA19-9 (< and ≥ 1000 U/mL allotted to scores 0 and 1) at first-line determination were used to develop the scoring system. The PDSs of patients with scores of 0 and 1 were significantly better than those of the BSC group; however, there was no significant difference between the PDSs of patients with score 2 and the BSC group.
Conclusion
The survival advantage of second-line CTx, was observed in patients with scores of 0 and 1 but not in those with score 2.
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Availability of data and material
All data generated or analyzed in this study are stored in a secured research database. They are not publicly available; however, they are available through the corresponding author upon reasonable request.
Code availability
We used R ver. 3.6.1 (R Foundation for Statistical Computing, Vienna, Austria) for statistical analyses.
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Acknowledgements
We would like to thank all of the patients and their families, as well as the researchers from the 14 institutions that participated in the NAPOLEON study. We would also like to acknowledge the cooperation of the Fukuoka Medical Oncology Group–Kyushu Yamaguchi Total Oncology Group (FMOG–KYTOG) and the Saga Study Group for Liver Disease (SASLD). Dr. Y. Kawaguchi of the Saga Medical Centre, Koseikan, and Dr. M. Uenomachi of the Hamanomachi Hospital assisted with data collection and discussion. We would like to thank Enago (https://www.enago.jp) for the English language review.
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Study concepts: AK, SO, TO, NU, TM, TS, KM. Study design: AK, SO, MS, TO, MF, AM, NU, TM, TS, KM. Data acquisition: AK, SO, TO, FK, YU, JN, SA, MF, YO, AM, HT, TH, TS, KN, YI, NU, TM, TS, KM. Quality control of data and algorithms: AK, SO, MS, TO, TS, KM. Data analysis and interpretation: AK, SO, MS, TO, TM, TS, KM. Statistical analysis: AK, SO, MS, TO, TS, KM. Manuscript preparation: AK. Manuscript editing: TO, TM, TS, KM. Manuscript review: All authors.
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Conflict of interest
T.O. received grant from Chugai; T.S. received consulting fees from Taiho Pharmaceutical, Chugai, and Takeda; M.S. received personal fee from Sysmex Corporation; Y.K. received personal fee from Taiho Pharmaceutical; S.A. received personal fees from Taiho Pharmaceutical, Novartis Pharma, Chugai, Bristol-Myers Squibb, Daiichi-Sankyo, and AstraZeneca; A.M. received personal fees from Eli Lilly, Chugai, and Takeda. The remaining authors have no competing interests or financial disclosures to declare.
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This study was approved by the institutional review board or ethics committee of each participating institution prior to the study and conducted according to the Declaration of Helsinki.
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The requirement for consent to participate was waived because of the retrospective design of this study.
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Komori, A., Otsu, S., Shimokawa, M. et al. Scoring model with serum albumin and CA19-9 for metastatic pancreatic cancer in second-line treatment: results from the NAPOLEON study. Int J Clin Oncol 28, 1073–1081 (2023). https://doi.org/10.1007/s10147-023-02354-6
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DOI: https://doi.org/10.1007/s10147-023-02354-6