PMID- 33985455 OWN - NLM STAT- MEDLINE DCOM- 20211018 LR - 20240327 IS - 1471-2407 (Electronic) IS - 1471-2407 (Linking) VI - 21 IP - 1 DP - 2021 May 13 TI - Combination of gemcitabine, nab-paclitaxel, and S-1(GAS) as the first-line treatment for patients with locally advanced or advanced pancreatic ductal adenocarcinoma: study protocol for an open-label, single-arm phase I study. PG - 545 LID - 10.1186/s12885-021-08275-9 [doi] LID - 545 AB - BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is still a highly fatal malignancy among the most common cancers. More powerful treatments are expecting to bring hope for patients. Biweekly gemcitabine/nab-paclitaxel/S-1 (GAS) was proved safe and effective for patients with locally advanced pancreatic cancer in Japan. The objective of this study is to evaluate the feasibility and toxicity of GAS (repeated every 3 weeks) in the treatment of locally advanced or advanced pancreatic cancer and determine the recommended dose of S-1 in this combination. METHODS: This is an open-label, single-arm, and single-center phase I trial. Patients who have been diagnosed with locally advanced or advanced PDAC pathologically without previous systemic treatments will be enrolled and be treated with GAS chemotherapy every 3 weeks (nab-paclitaxel 125 mg/m (2), ivgtt, day1, 8; gemcitabine 1000 mg/m(2), day1, 8; different doses of S-1 within a dose escalation scheme) until the presence of disease progression (PD), intolerable adverse events (AEs), or requirement of patients and researchers. The primary endpoints are maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). The secondary endpoints include safety, objective response rate (ORR), progression-free survival (PFS) and overall survival (OS). DISCUSSION: This trial will adjust the administration of GAS to make it more effective for Chinese patients, while exploring the toxicity and feasibility of this adjustment. TRIAL REGISTRATION: ChiCTR, ( ChiCTR1900027833 ). Registered 30 November 2019. FAU - Chang, Chen AU - Chang C AD - Department of Abdominal Oncology, Cancer Center, West China Hospital, Sichuan University, No.37 Guoxue Alley, Chengdu, 610041, Sichuan, China. FAU - Li, Xiaofen AU - Li X AD - Department of Abdominal Oncology, Cancer Center, West China Hospital, Sichuan University, No.37 Guoxue Alley, Chengdu, 610041, Sichuan, China. FAU - Cao, Dan AU - Cao D AD - Department of Abdominal Oncology, Cancer Center, West China Hospital, Sichuan University, No.37 Guoxue Alley, Chengdu, 610041, Sichuan, China. hxcaodan2019@163.com. LA - eng GR - 81773097/National Natural Science Foundation of China/ PT - Clinical Trial Protocol PT - Journal Article DEP - 20210513 PL - England TA - BMC Cancer JT - BMC cancer JID - 100967800 RN - 0 (130-nm albumin-bound paclitaxel) RN - 0 (Albumins) RN - 0W860991D6 (Deoxycytidine) RN - 0 (Drug Combinations) RN - 0 (Gemcitabine) RN - 5VT6420TIG (Oxonic Acid) RN - P88XT4IS4D (Paclitaxel) RN - 150863-82-4 (S 1 (combination)) RN - 1548R74NSZ (Tegafur) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Female MH - Humans MH - Male MH - Middle Aged MH - Young Adult MH - *Albumins/administration & dosage/adverse effects MH - *Antineoplastic Combined Chemotherapy Protocols/therapeutic use MH - *Carcinoma, Pancreatic Ductal/drug therapy/mortality MH - *Deoxycytidine/administration & dosage/adverse effects/analogs & derivatives MH - Drug Combinations MH - Gemcitabine MH - *Oxonic Acid/administration & dosage/adverse effects MH - *Paclitaxel/administration & dosage/adverse effects MH - *Pancreatic Neoplasms/drug therapy/mortality MH - *Tegafur/administration & dosage/adverse effects MH - Clinical Trials, Phase I as Topic PMC - PMC8117556 OTO - NOTNLM OT - Clinical protocol OT - Combination therapy OT - Gemcitabine OT - Nab-paclitaxel OT - Pancreatic ductal adenocarcinoma OT - S-1 COIS- The authors declare no competing interests. EDAT- 2021/05/15 06:00 MHDA- 2021/10/21 06:00 PMCR- 2021/05/13 CRDT- 2021/05/14 05:36 PHST- 2021/03/28 00:00 [received] PHST- 2021/04/29 00:00 [accepted] PHST- 2021/05/14 05:36 [entrez] PHST- 2021/05/15 06:00 [pubmed] PHST- 2021/10/21 06:00 [medline] PHST- 2021/05/13 00:00 [pmc-release] AID - 10.1186/s12885-021-08275-9 [pii] AID - 8275 [pii] AID - 10.1186/s12885-021-08275-9 [doi] PST - epublish SO - BMC Cancer. 2021 May 13;21(1):545. doi: 10.1186/s12885-021-08275-9.