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J Clin Oncol. 2019 May 1;37(13):1062-1069. doi: 10.1200/JCO.18.01295. Epub 2019 Feb 28.

Phase IB/II Randomized Study of FOLFIRINOX Plus Pegylated Recombinant Human Hyaluronidase Versus FOLFIRINOX Alone in Patients With Metastatic Pancreatic Adenocarcinoma: SWOG S1313.

Author information

1
1 Mayo Clinic Cancer Center, Phoenix, AZ.
2
2 Southwest Oncology Group Statistics and Data Management Center, Seattle, WA.
3
3 Fred Hutchinson Cancer Research Center, Seattle, WA.
4
4 Karmanos Cancer Institute/Wayne State University, Detroit, MI.
5
5 Yale Cancer Center, New Haven, CT.
6
6 Saint Francis Hospital and Medical Center, Enfield, MA.
7
7 University of Washington, Seattle, WA.
8
8 Sutter Cancer Research Consortium, Sacramento, CA.
9
9 Heartland NCI Community Oncology Research Program (NCORP), Missouri Baptist Medical Center Cancer Center, St Louis, MO.
10
10 Kansas City NCI Community Oncology Research Program (NCORP), Prairie Village, KS.
11
11 UC Irvine Medical Center, Orange, CA.
12
12 Rutgers Cancer Institute of New Jersey, New Brunswick, NJ.

Abstract

PURPOSE:

Pegylated recombinant human hyaluronidase (PEGPH20) degrades hyaluronan (HA) and, in combination with chemotherapy, prolongs survival in preclinical models. The activity of PEGPH20 with modified fluorouracil, leucovorin, irinotecan, and oxaliplatin (mFOLFIRINOX) was evaluated in patients with metastatic pancreatic cancer (mPC).

MATERIALS AND METHODS:

Patients had untreated mPC, a performance status of 0 to 1, and adequate organ function. Tumor HA status was not required for eligibility. After a phase Ib dose-finding study of mFOLFIRINOX plus PEGPH20, the phase II open-label study randomly assigned patients (1:1) to the combination arm or to mFOLFIRINOX alone (n = 138). The primary end point was overall survival (OS).

RESULTS:

PEGPH20 dosages of 3 µg/kg every 2 weeks were more tolerable than twice-weekly dosages used in the phase I study, so 3 µg/kg every 2 weeks was the phase II dosage. An amendment instituted enoxaparin prophylaxis in the PEGPH20 combination arm as a result of increased thromboembolic (TE) events. The planned interim futility analysis when 35 deaths (of 103 analyzable patients) occurred resulted in an OS hazard ratio (HR) of 2.07 that favored the control arm, and the study was closed to accrual. The treatment-related grade 3 to 4 toxicity was significantly increased in the PEGPH20 combination arm relative to control (odds ratio, 2.7; 95% CI, 1.1 to 7.1). The median OS in the mFOLFIRINOX arm was 14.4 months (95% CI, 10.1 to 15.7 months) versus 7.7 months (95% CI, 4.6 to 9.3 months) in the PEGPH20 combination arm.

CONCLUSION:

Addition of PEGPH20 to mFOLFIRINOX seems to be detrimental in patients unselected for tumor HA status. This combination caused increased toxicity (mostly GI and TE events) and resulted in decreased treatment duration compared with mFOLFIRINOX alone. The median OS in the mFOLFIRINOX control arm (14.4 months) is, to our knowledge, the longest yet reported and can be considered for patients with good PS.

PMID:
30817250
PMCID:
PMC6494359
[Available on 2020-05-01]
DOI:
10.1200/JCO.18.01295

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