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No longer recruiting (closed or complete)Last updated: 6 October 2025

PRISM-1: A study for people with metastatic pancreatic cancer who have not had treatment for their advanced disease to assess targeted therapy + chemotherapyA Randomized, Placebo-Controlled, Double-Blind, Multicenter, Phase 3 Trial of Quemliclustat and Chemotherapy Versus Placebo and Chemotherapy in Patients With Treatment-Naive Metastatic Pancreatic Ductal Adenocarcinoma

Trial purpose

Medical clipboardCancer treatment

Tumor type

Upper gastrointestinal tract Cancers Upper gastrointestinal tract

Age

People18+

Trial acronym

PRISM-1

Clinical summary

Summary

Eligible participants will be randomly allocated to one of two treatment arms.

In Arm A, participants will receive Quemliclustat targeted therapy pus chemotherapy (nab-paclitaxel and gemcitabine) by IV infusion.

In Arm B, participants will receive a placebo plus chemotherapy (nab-paclitaxel and gemcitabine) by IV infusion. 

Conditions

This trial is treating people with metastatic pancreatic cancer who have not had treatment for their metastatic/advanced disease

Eligibility

Inclusion

  • Have histologically or cytologically confirmed PDAC that is metastatic.
  • Have not been previously treated for PDAC in the metastatic setting.

    1. Prior neoadjuvant and/or adjuvant therapy for PDAC is permitted if completed at least 12 months before randomization.
    2. Prior palliative radiotherapy is allowed if completed at least 2 weeks prior to randomization and AEs have resolved to Grade 1 or less before randomization.
    3. Prior and/or placement of a biliary stent/tube is permitted if any treatment-related AEs have improved to Grade ≤ 1 and the patient is not exhibiting any signs/symptoms of biliary obstruction.
  • Eastern Cooperative Oncology Group PS of 0 to 1.
  • At least 1 target lesion measurable by computed tomography (CT)/magnetic resonance imaging (MRI) per RECIST v1.1. not within a field of prior radiation therapy.

Exclusion

  • Previously treated for locally advanced, unresectable PDAC.
  • History of brain metastases or leptomeningeal metastases.
  • Prior treatment with a CD73 antagonist or inhibitor.
  • Underlying medical conditions that, in the investigator or sponsor's opinion, will make the administration of study-specified therapy hazardous

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.

Inclusion

  • Your cancer has not spread to other parts of the body, but it is not possible to perform surgery to remove it (unresectable).

Exclusion

  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

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No longer recruiting (closed or complete) hospitals

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

  • NCT06608927 *
  • PRISM-1; 2024-513317-12-00; JRCT2061240084

Trial sponsor

Arcus Biosciences, Inc.

Scientific Title

A Randomized, Placebo-Controlled, Double-Blind, Multicenter, Phase 3 Trial of Quemliclustat and Chemotherapy Versus Placebo and Chemotherapy in Patients With Treatment-Naive Metastatic Pancreatic Ductal Adenocarcinoma

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