A Study to Evaluate the Safety and Tolerability of AB680 in Participants With Gastrointestinal Malignancies (ARC-8)

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Arcus Biosciences

Status and phase

Enrolling
Phase 1

Conditions

Advanced Pancreatic Cancer

Treatments

Drug: Zimberelimab
Drug: Gemcitabine
Drug: AB680
Drug: Nab-paclitaxel

Study type

Interventional

Funder types

Industry

Identifiers

NCT04104672
ARC-8 (AB680CSP0002)

Details and patient eligibility

About

This is a Phase 1, open-label, dose-escalation, and dose-expansion, with a gated randomization portion, study to evaluate the safety, tolerability, pharmacokinetic, pharmacodynamic and clinical activity of AB680 in combination with Zimberelimab (AB122), nab-paclitaxel and gemcitabine in participants with advanced pancreatic cancer.

Full description

Dose escalation of AB680 in combination with Zimberelimab (AB122), nab-paclitaxel and gemcitabine will be assessed in participants with advanced pancreatic cancer. In this dose escalation combination study, participants with advanced pancreatic cancer will receive escalating doses of AB680 in combination with Zimberelimab at the recommended phase 2 dose (RP2D), and nab-paclitaxel and gemcitabine at standard doses. AB680, Zimberelimab, nab-paclitaxel and gemcitabine are all administered via IV infusion. In the dose expansion portion of the study in front-line (1L) pancreatic patients, participants will receive AB680 at the RP2D determined from the dose escalation study in combination with Zimberelimab at the RP2D and nab-paclitaxel and gemcitabine at standard doses or AB680 at the RP2D in combination with nab-paclitaxel and gemcitabine at standard doses. In the dose-expansion portion of the study in second-line (2L) pancreatic patients, participants will receive AB680 at the RP2D determined from the dose-escalation study in combination with Zimberelimab at the RP2D and nab-paclitaxel and gemcitabine at standard doses.

Enrollment

195 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

  • Histologically or cytologically confirmed metastatic pancreatic adenocarcinoma

  • Naïve to any prior treatment, including chemotherapy, biological therapy, or targeted therapy for metastatic disease

    • Prior adjuvant therapy (including chemotherapy and/or radiotherapy) for pancreatic adenocarcinoma is permitted if neoadjuvant or adjuvant therapy was completed at least 6 months prior to study enrollment. Prior adjuvant therapy may include Nab- paclitaxel or gemcitabine
    • Participants initially diagnosed with locally advanced pancreatic cancer who have undergone chemotherapy then resection and had no evidence of disease are eligible if relapse of metastatic disease has occurred and if the last dose of chemotherapy was received more than 6 months before study entry
  • Must have at least 1 measurable lesion per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. The measurable lesion must be outside of a radiation field if the participant received prior radiation

  • Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1

  • Confirmation that an archival tissue sample is available; if not, a new biopsy of a tumor must be obtained

  • Prior radiation therapy for metastatic disease must have been completed

  • Immunosuppressive doses of systemic medications, such as corticosteroids or absorbed topical corticosteroids (doses > 10 mg/day prednisone or equivalent) must be discontinued at least 2 weeks (14 days) before investigational product administration. Physiologic doses of corticosteroids (≤ 10 mg/day of prednisone or its equivalent) or short pulses of corticosteroids (≤ 3 days) may be permitted

  • Prior surgery that required general anesthesia or other major surgery as defined by the Investigator must be completed at least 4 weeks before investigational product administration

  • Negative tests for hepatitis B surface antigen, hepatitis C virus antibody (or hepatitis C qualitative ribonucleic acid [RNA; qualitative]), and human immunodeficiency virus (HIV)-1 and HIV-2 antibody at screening

  • Adequate organ and marrow function

Key Exclusion Criteria:

  • Significant cardiovascular disease (NYHA Class III-IV), myocardial infarction or cerebrovascular accident within 12 months of the first dose of investigational agent or history of arterial thromboembolic event, uncontrolled hypertension, unstable arrhythmia, or unstable angina within 3 months or venous thromboses within 1 month of the first dose of investigational agent.
  • Any active autoimmune disease or a documented history of autoimmune disease or history of a syndrome that required systemic steroids or immunosuppressive medications, except for vitiligo or resolved childhood asthma/atopy. Participants with asthma who require intermittent use of bronchodilators (such as albuterol) will not be excluded from this study
  • History of a syndrome that required systemic steroids or immunosuppressive medications, except for vitiligo or resolved childhood asthma/atopy. Participants with asthma who require intermittent use of bronchodilators (such as albuterol) will not be excluded from this study
  • Prior malignancy active within the previous year except for locally curable cancers that have been apparently cured, such as basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the cervix, breast, or prostate cancer
  • Has not recovered (ie, ≤ Grade 1 or baseline) from a non-hematologic AEs due to a previously administered agent, except ≤ Grade 2 alopecia or ≤ Grade 2 neuropathy.

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

Trial design

Primary purpose

Treatment

Allocation

Non-Randomized

Interventional model

Sequential Assignment

Masking

None (Open label)

195 participants in 6 patient groups

Dose Escalation
Experimental group
Description:
Dose escalation is a 3+3 design, including a Dose Limiting Toxicity (DLT) evaluation period. The dose expansion dose level will be determined in this part with escalating doses of AB680 in combination with Zimberelimab at the recommended phase 2 dose (RP2D) and the standard nab-paclitaxel and gemcitabine chemotherapy regimen in participants with advanced pancreatic cancer.
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine
Drug: Zimberelimab
Dose Expansion(AB680+Zimberelimab+nab-paclitaxel(NP) & gemcitabine (Gem):Cohort A1 (front-line/1L)
Experimental group
Description:
Participants with advance pancreatic cancer, naïve to any prior treatment will receive AB680 (at the RP2D identified during dose escalation) combined with Zimberelimab and the standard nab-paclitaxel (NP) and gemcitabine (Gem) (NP/Gem) chemotherapy regimen
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine
Drug: Zimberelimab
Dose Expansion (AB680 + NP/Gem): Cohort A2 (front-line/1L)
Experimental group
Description:
Participants with advance pancreatic cancer who are naïve to any prior treatment will receive AB680 (at the RP2D identified during dose escalation) and the standard NP/Gem chemotherapy regimen.
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine
Dose Expansion (AB680 + Zimberelimab + NP/Gem): Cohort B (second-line/2L)
Experimental group
Description:
Participants with advance pancreatic cancer who have received 1 prior line of treatment will receive AB680 (at the RP2D identified during dose escalation) combined with Zimberelimab and NP-Gem chemotherapy regimen.
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine
Drug: Zimberelimab
Dose Expansion (AB680 + Zimberelimab + NP/Gem): Cohort C (front-line/1L)
Experimental group
Description:
Participants with advance pancreatic cancer naïve to any prior treatment will receive AB680 combined with Zimberelimab and NP-Gem chemotherapy regimen.
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine
Drug: Zimberelimab
Dose Expansion (AB680 + NP/Gem): Cohort D (front-line/1L)
Experimental group
Description:
Participants with advance pancreatic cancer naïve to any prior treatment will receive AB680 combined with NP-Gem chemotherapy regimen.
Treatment:
Drug: Nab-paclitaxel
Drug: AB680
Drug: Gemcitabine

Trial contacts and locations

18

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Central trial contact

Medical Director

Data sourced from clinicaltrials.gov

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