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WithdrawnNCT03973333Updated Oct 18, 2024

Safety and Efficacy of IMC-C103C as Monotherapy and in Combination With Atezolizumab

A Phase 1/2 interventional study of IMC-C103C and Atezolizumab in Select Advanced Solid Tumors, sponsored by Immunocore Ltd. Withdrawn at 19 sites in 3 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-10-18.

Sponsored by Immunocore Ltd · Phase 1/2, Interventional, and Treatment

Why this study was withdrawn
Study withdrawn by Sponsor
Phase
Phase 1/2
Study type
Interventional
Enrollment
0
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

IMC-C103C is an immune mobilizing monoclonal T cell receptor against cancer (ImmTAC ®) designed for the treatment of cancers positive for the tumor-associated antigen MAGE-A4. This is a first-in-human trial designed to evaluate the safety and efficacy of IMC-C103C in adult patients who have the appropriate HLA-A2 tissue marker and whose cancer is positive for MAGE-A4.

Read the detailed description

The IMC-C103C-101 Phase 1/2 study will be evaluated in patients with metastatic/unresectable tumors which include select Advanced Solid Tumors and will be conducted in two phases.

  1. To identify the maximum tolerated dose (MTD) and/or expansion dose of IMC-C103C as a single agent administered intravenously (IV) and subcutaneously (SC) once weekly (Q1W) and administered Q1W in combination with once every 3 weeks (Q3W) atezolizumab.
  2. To assess the preliminary anti-tumor activity of IMC-C103C in one or more selected indications, as a single agent administered Q1W.
02

Conditions studied

  • Select Advanced Solid Tumors

Keywords

  • ImmTAC, IMC-C103C, MAGE-A4, immunotherapy
03

In context

Lead sponsor

Immunocore Ltd is the lead sponsor of 14 studies on the registry; 6 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. HLA-A*02:01 positive
  2. MAGE-A4 positive tumor
  3. Eastern Cooperative Oncology Group (ECOG) performance status (PS) [ECOG PS] 0 or 1
  4. Selected advanced solid tumors
  5. Relapsed from, refractory to, or intolerant of standard therapy
  6. Measurable disease per RECIST v1.1 (expansion)
  7. If applicable, must agree to use highly effective contraception

Exclusion criteria

Exclusion Criteria:

  1. Symptomatic or untreated central nervous system metastasis
  2. Inadequate washout from prior anticancer therapy
  3. Significant ongoing toxicity from prior anticancer treatment
  4. Impaired baseline organ function as evaluated by out-of-range laboratory values
  5. Clinically significant cardiac disease
  6. Active infection requiring systemic antibiotic therapy
  7. Known history of human immunodeficiency virus (HIV)
  8. Active hepatitis B virus (HBV) or hepatitis C virus (HCV)
  9. Ongoing treatment with systemic steroids or other immunosuppressive therapies
  10. Significant secondary malignancy
  11. Pregnancy or lactation
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    IMC-C103C - Monotherapy IV dose escalation

    n= approximately 50 patients to establish the MTD/expansion dose

    Drug: IMC-C103C

  • Experimental
    IMC-C103C and atezolizumab dose escalation

    n=approximately 12 patients to establish the MTD/expansion dose

    Drug: IMC-C103C · Drug: Atezolizumab

  • Experimental
    IMC-C103C - expansion

    Patients will be enrolled n=9-24 per expansion cohort (up to 4 total): metastatic/unresectable tumors of interest patients treated at the expansion dose of IMC-C103C to assess preliminary anti-tumor efficacy

    Drug: IMC-C103C

  • Experimental
    IMC-C103C monotherapy SC dose escalation

    Patients will be enrolled n=9-12 to establish the MTD/expansion dose

    Drug: IMC-C103C

Interventions

  • DrugIMC-C103C

    Weekly IV infusions

  • DrugAtezolizumab

    IV infusions every 3 weeks

    Also known as: TECENTRIQ

  • DrugIMC-C103C

    Weekly subcutaneous Injection

06

What researchers measure

Primary outcomes

  1. Phase 1: Incidence of dose-limiting toxicities (DLT)

    Time frame: From first dose to DLT period (28 days)

  2. Phase 1: incidence and severity of adverse events (AE)

    Time frame: from first dose to 30 days after the last dose

  3. Phase 1: changes in laboratory parameters

    Abnormalities will be classified according to NCI CTCAE v5.0

    Time frame: from first dose to 30 days after the last dose

  4. Phase 1: changes in vital signs

    Abnormalities will be classified according to NCI CTCAE v5.0

    Time frame: from first dose to 30 days after the last dose

  5. Phase 1: changes in electrocardiogram parameters

    QT intervals corrected for heart rate using Fridericia's (cube root) correction (QTcF) interval absolute values and changes from baseline will be summarized

    Time frame: from first dose to 30 days after the last dose

  6. Phase 1: dose interruptions, reductions, and discontinuations

    Time frame: from first dose through last dose (anticipated for up to 12-24 months)

  7. Phase 2: Best overall response (BOR)

    Time frame: from first dose to approximately 2 years

Secondary outcomes

  1. Phase 2: incidence and severity of adverse events (AE)

    Time frame: from first dose to 30 days after the last dose

  2. Phase 2: changes in laboratory parameters

    Abnormalities will be classified according to NCI CTCAE v5.0

    Time frame: from first dose to 30 days after the last dose

  3. Phase 2: changes in vital signs

    Abnormalities will be classified according to NCI CTCAE v5.0

    Time frame: from first dose to 30 days after the last dose

  4. Phase 2: changes in electrocardiogram parameters

    QTcF interval absolute values and changes from baseline will be summarized

    Time frame: from first dose to 30 days after the last dose

  5. Phase 2: dose interruptions, reductions, and discontinuations

    Time frame: from first dose through last dose (anticipated for up to 12-24 months)

  6. Phase 1: Best overall response

    Time frame: from first dose to approximately 2 years

  7. Progression-free survival

    Time frame: from first dose to approximately 2 years

  8. Duration of response

    Time frame: from first dose to approximately 2 years

  9. Overall survival

    Time frame: from first dose to approximately 2 years

  10. Pharmacokinetics Area under the plasma concentration-time curve (AUC)

    Time frame: from first dose to within approx, 2 weeks of last dose/4 weeks (IMC-C103C AUC will be assessed weekly for 4 weeks)

  11. Pharmacokinetics The maximum observed plasma drug concentration after single dose administration (Cmax)

    Time frame: from first dose to within approx, 2 weeks of last dose/4 weeks (IMC-C103C AUC will be assessed weekly for 4 weeks)

  12. Pharmacokinetics The time to reach maximum plasma concentration (Tmax)

    Time frame: from first dose to within approx, 2 weeks of last dose/4 weeks (IMC-C103C AUC will be assessed weekly for 4 weeks)

  13. Pharmacokinetics The elimination half-life (t1/2)

    Time frame: from first dose to within approx, 2 weeks of last dose/4 weeks (IMC-C103C AUC will be assessed weekly for 4 weeks)

  14. Immunogenicity the incidence of anti-drug antibody formation

    Time frame: from first dose to 14 days after the last dose

  15. Changes in lymphocyte counts over time

    Time frame: from first dose to approx 4 weeks

  16. Changes in serum cytokines over time

    Time frame: from first dose to approx.. 4wks

  17. GCIG CA-125 response (ovarian carcinoma)

    Time frame: from first dose to approx.. 30 days after the last dose

07

Study locations

19 sites
  • The Angeles Clinic and Research Institute
    Los Angeles, California 90025, United States
  • University of California Davis Comprehenvise Cancer Center
    Sacramento, California 95817, United States
  • University of Colorado Cancer Center
    Aurora, Colorado 80045, United States
  • The University of Chicago Medicine & Biological Sciences
    Chicago, Illinois 60637, United States
  • Memorial Sloan Kettering Cancer Center
    New York, New York 10065, United States
  • Oklahoma University Medical Center
    Oklahoma City, Oklahoma 73104, United States
  • Thomas Jefferson University Hospital
    Philadelphia, Pennsylvania 19107, United States
  • UPMC Cancer Center
    Pittsburgh, Pennsylvania 15213, United States
  • Sarah Cannon Research Institute at Tennessee Oncology
    Nashville, Tennessee 37203, United States
  • MD Anderson Cancer Center
    Houston, Texas 77030, United States
  • Hospital Universitario Vall d'Hebron
    Barcelona, 8035, Spain
  • Clinica Universidad Navarra
    Madrid, 28027, Spain
  • Hospital Universitario La Paz - PPDS
    Madrid, 28046, Spain
  • Clinica Universidad Navarra
    Pamplona, 31008, Spain
  • Beatson West of Scotland Cancer Centre
    Glasgow, Scotland G12 OYN, United Kingdom
  • The Clatterbridge Hospital Cancer Center
    Bebington, CH634JY, United Kingdom
  • Sarah Cannon Research Institute
    London, W1G 6AD, United Kingdom
  • The Christie NHS Foundation Trust
    Manchester, M20 4BX, United Kingdom
  • Royal Marsden Hospital
    Sutton, SM2 5PT, United Kingdom
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 18, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03973333
Lead sponsor
Immunocore Ltd
Responsible party
Sponsor
First posted
Jun 4, 2019
Start date
May 17, 2019 (estimated)
Primary completion
Sep 25, 2023 (estimated)
Completion
Sep 25, 2023 (estimated)
Last update
Oct 18, 2024

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is withdrawn, as verified in Oct 2024. You cannot join it, but the record below documents what was studied.

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