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Active, not recruitingNCT03448042Updated Aug 26, 2026

A Study of Runimotamab in Participants With Locally Advanced or Metastatic HER2-Expressing Cancers

A Phase 1 interventional study of Runimotamab and Trastuzumab in Solid Tumors, sponsored by Genentech, Inc.. Active, not recruiting at 26 sites in 13 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-26.

Sponsored by Genentech, Inc. (part of Hoffmann-La Roche) · Phase 1, Interventional, and Treatment

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Phase
Phase 1
Study type
Interventional
Enrollment
123
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

This study will evaluate the safety, tolerability, and pharmacokinetics of Runimotamab administered intravenously as a single agent and in combination with Trastuzumab in participants with locally advanced or metastatic Human Epidermal Growth Factor Receptor 2 (HER2)-expressing cancers.

02

Conditions studied

  • Solid Tumors
03

In context

Lead sponsor

Genentech, Inc. is the lead sponsor of 517 studies on the registry; 20 are open to participants now.

Of its 95 completed or terminated interventional studies of FDA-regulated products, 52 (55%) have results posted.

First submitted after Genentech, Inc. became part of Hoffmann-La Roche.

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

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • (ECOG) Performance Status of 0 or 1
  • of at least 12 weeks
  • Adequate hematologic and end-organ function
  • Acute, treatment-related toxicity from prior therapy must have resolved to Grade \</=1 prior to study entry
  • (LVEF) >/=50%

-Expressing Breast Cancer-Specific Inclusion Criteria

  • Locally tested, Human Epidermal Growth Factor Receptor 2 (HER2)-expressing BC
  • Locally advanced or BC that has or is refractory to established therapies

HER2-Expressing Gastric/Gastroesophageal (GEJ) Cancer-Specific Inclusion Criteria

  • Adenocarcinoma of the stomach or GEJ with inoperable locally advanced or recurrent and/or metastatic disease, not amenable to curative therapy
  • HER2-expressing tumor (primary tumor or metastasis) as assessed by local lab testing
  • HER2-positive gastric/GEJ cancer must have received prior trastuzumab, cisplatin (or carboplatin or oxaliplatin or platinum agent) and 5-fluorouracil (5-FU)/capecitabine

HER2-Positive Solid Tumor Specific Inclusion Criteria

  • HER2-positive tumor (primary tumor or metastasis) as assessed by local (non-central) laboratory testing
  • Locally advanced, recurrent, or metastatic incurable that has progressed after at least one available standard therapy; or for whom standard therapy has proven to be ineffective or intolerable, or is considered inappropriate; or for whom a clinical trial of an investigational agent is a recognized standard of care; or for whom a clinical trial of an investigational agent is considered an acceptable treatment option

Exclusion criteria

Exclusion Criteria

  • Pregnant or breastfeeding, or intending to become pregnant during the study or within 140 days after the last dose of runimotamab
  • Significant cardiopulmonary dysfunction
  • Known liver disease
  • Positive for acute or chronic virus (HBV) infection
  • Acute or chronic virus (HCV) infection
  • (HIV) seropositivity
  • Poorly controlled Type 2 diabetes mellitus
  • History of ventricular dysrhythmias or risk factors for ventricular dysrhythmias
  • Current treatment with medications that are well known to prolong the Q-wave/T-wave () interval
  • Known clinically significant liver disease
  • Primary central nervous system (CNS) , untreated , or active CNS metastases (progressing or requiring for symptomatic control)
  • Spinal cord compression that has not definitively treated with surgery and/or radiation
  • History of disease
  • Prior allogeneic stem cell or solid organ transplantation
Terms in these criteria, in plain language(17)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

05

Study design

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

Study arms

  • Experimental
    Dose Escalation

    Participants will be assigned sequentially to escalating doses of runimotamab up to the maximum tolerated dose (MTD).

    Drug: Runimotamab · Drug: Trastuzumab · Drug: Tocilizumab

  • Experimental
    Dose Expansion

    Participants will receive runimotamab based on the MTD or maximum allowed dose (MAD) identified during dose escalation.

    Drug: Runimotamab · Drug: Trastuzumab · Drug: Tocilizumab

Interventions

  • DrugRunimotamab

    Runimotamab will be administered via IV infusion until disease progression, intolerable toxicity, or any other discontinuation criteria are met.

    Also known as: BTRC4017A, RO7227780

  • Trastuzumab will be administered via IV infusion

  • Participants will receive IV tocilizumab if needed

06

What researchers measure

Primary outcomes

  1. Percentage of Participants with Adverse Events

    Time frame: From baseline through end of study (approximately 78 months)

Secondary outcomes

  1. Serum Concentration of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  2. Area Under the Serum Concentration vs. Time Curve (AUC) of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  3. Maximum Observed Serum Concentration (Cmax) of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  4. Minimum Observed Serum Concentration (Cmin) of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  5. Clearance (CL) of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  6. Volume of Distribution at Steady State (Vss) of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

  7. Objective Response (OR) as Determined by the Investigator According to Response Evaluation Criteria In Solid Tumors v1.1 (RECIST v1.1)

    Time frame: Baseline through the end of study (approximately 78 months)

  8. Duration of Response (DOR)

    Time frame: From the first occurrence of a documented objective response to first documented disease progression or death from any cause, through the end of the study (approximately 78 months)

  9. Anti-Drug Antibody (ADA) Levels of Runimotamab

    Time frame: At predefined intervals from Cycle 1, Day 1 (approximately 1 year)

07

Study locations

26 sites
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jun 2018 (actual). Primary completion is estimated for Apr 2027, 106 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 20, 2018
First posted
Feb 27, 2018
StartActual
Jun 6, 2018
Primary completionEst.
Apr 30, 2027
CompletionEst.
Apr 30, 2027
Last update
Aug 26, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 26, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03448042
Lead sponsor
Genentech, Inc.
Responsible party
Sponsor
First posted
Feb 27, 2018
Start date
Jun 6, 2018
Primary completion
Apr 30, 2027 (estimated)
Completion
Apr 30, 2027 (estimated)
Last update
Aug 26, 2026

Study contacts

Clinical Trials
study director · Genentech, Inc.

Oversight

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

Not currently enrolling

This study is active, not recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.

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