ClinicalTrials.gg
Approved for marketingNCT04100694Updated May 20, 2025

Early Access Program Providing HER2/HER3 Bispecific Antibody, MCLA-128, for a Patient With Advanced NRG1-Fusion Positive Solid Tumor

An expanded access record providing MCLA-128 in NRG1 Fusion, Pancreatic Cancer and Non Small Cell Lung Cancer, sponsored by Merus N.V.. Approved for marketing. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-05-20.

Sponsored by Merus N.V. (part of Genmab) · Expanded access

Study type
Expanded access
Access type
Individual patients
Ages
18 Years and older
Sex
All
01

Study summary

Merus is providing single patient/named access to the HER2/HER3 bispecific antibody, MCLA-128, to patients with advanced NRG1-fusion positive solid tumor under this early access program who are ineligible for an ongoing MCLA-128 clinical trial or have other considerations that prevent access to MCLA-128 through an existing clinical trial. Participating sites will be added as they apply for and are approved for the EAP. A medical doctor must decide whether the potential benefit outweighs the risk of receiving an investigational therapy based on the individual's medical history and program eligibility criteria.

02

Conditions studied

  • NRG1 Fusion
  • Pancreatic Cancer
  • Non Small Cell Lung Cancer
  • Solid Tumor, Unspecified, Adult
  • Prostate Cancer
  • Head and Neck Cancer
  • Colorectal Cancer
  • Breast Cancer
  • Cholangiocarcinoma
  • Renal Cell Carcinoma
  • Unknown Primary Tumors

Keywords

  • Early Access
  • NRG1 fusion
  • Pancreas cancer
  • Non Small Cell Lung Cancer
  • Solid tumor
  • Compassionate use
  • Expanded access
03

In context

Pancreatic Neoplasms

3,896 studies on the registry are indexed under Pancreatic Neoplasms; 1,007 are open to participants now.

Browse Pancreatic Neoplasms studies →

Lead sponsor

Merus N.V. is the lead sponsor of 3 studies on the registry; none are open to participants now.

First submitted before Merus N.V. became part of Genmab.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All

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

  • Age 18 years or older
  • At least one evaluable or according to v1.1
  • Patient with advanced solid tumor with documented NRG1 fusion determined in a qualified local laboratory by molecular profiling using methods such as next generation sequencing [DNA or RNA] as routinely performed at CLIA or other similarly-certified laboratories.
  • Treatment with anticancer medications or drugs within the following intervals before the first administration of MCLA-128:

    1. At least 14 days for chemotherapy, targeted small molecule therapy, or radiation therapy OR
    2. At least 5 half-lives have passed since discontinuation of the systemic treatment
  • (ECOG) performance status 0 to 2
  • Adequate organ function at the time of initiation of treatment administration
  • Negative pregnancy test results in women of (defined as women ≤50 years of age or history of amenorrhea for ≤12 months prior to study entry)
  • Ability to give written, prior to treatment, with the understanding that the consent may be withdrawn by the patient at any time without prejudice
  • Not eligible or feasible to participate in a clinical trial
  • Any condition that in the opinion of Merus may preclude appropriate use of the investigational medicine

Exclusion criteria

Exclusion Criteria:

  • Any untreated, symptomatic central nervous system (CNS) lesion
  • Presence of an active and uncontrolled infection
  • Known to any of the components of MCLA-128 or history of severe hypersensitivity reactions to human or humanized monoclonal antibodies, including therapeutic antibodies
  • Presence of \<50% on the screening echocardiogram; or history or presence of any significant cardiovascular disease, including unstable angina or myocardial infarction within 12 months prior to treatment, congestive heart failure ( Class III or IV), or ventricular arrhythmia requiring medication
  • Presence of any other medical or psychological condition deemed by the Physician to be likely to interfere with a patient's ability to sign , cooperate or participate in the study, or interfere with the interpretation of the results.
Terms in these criteria, in plain language(11)

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.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Metastases

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

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.

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.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

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.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

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.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

05

Access details

Study type
Expanded access
Access type
Individual patients

Available treatment

  • DrugMCLA-128
06

Where to request access

No study locations are listed for this record.

07

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 20, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
08

Registry details

Key details

Study ID
NCT04100694
Lead sponsor
Merus N.V.
Responsible party
Sponsor
First posted
Sep 24, 2019
Last update
May 20, 2025
View the source record on ClinicalTrials.gov ↗

Requesting access

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No contact was published for this record. The registry link below has the sponsor’s details.

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