ClinicalTrials.gg
Not yet recruitingNCT07644312Updated Sep 9, 2026

Study of Relatlimab and Nivolumab (Opdualag) in Replication Repair Deficient HGG and DIPG

A Phase 2 interventional study of Opdualag in High Grade Glioma, Diffuse Intrinsic Pontine Glioma and WHO Grade 3 Glioma, sponsored by Nationwide Children's Hospital. Not yet recruiting. Open to participants aged 12 Years to 39 Years. Per ClinicalTrials.gov, last updated 2026-09-09.

Primary conditionDiffuse Intrinsic Pontine GliomaRegistry: GliomaReclassifiedWhy we changed it
Registry
Glioma — the first condition term the registry derived for this study.
ClinicalTrials.gg
Diffuse Intrinsic Pontine Glioma
Why
  1. The study's listed conditions name Diffuse Intrinsic Pontine Glioma, a narrower term within Glioma.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Nationwide Children's Hospital · Phase 2, Interventional, and Treatment

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Phase
Phase 2
Study type
Interventional
Enrollment
12
Allocation
Not applicable
Ages
12 Years to 39 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 10 studies in Diffuse Intrinsic Pontine Glioma by Nationwide Children's Hospital — 9 open to participants now, 10 under way, none of them phase 3. Diffuse Intrinsic Pontine Glioma · Nationwide Children's Hospital.

Started
2027
with 1 other
Phase 2
5 of 10
5 open now
Registered
10th of 10
by date

Among the 10 studies in Diffuse Intrinsic Pontine Glioma by Nationwide Children's Hospital, this one is one of 2 that started in 2027, is one of 5 in phase 2, and was the 10th registered.

Diffuse Intrinsic Pontine Glioma

119 studies on the registry are indexed under Diffuse Intrinsic Pontine Glioma; 39 are open to participants now.

Browse Diffuse Intrinsic Pontine Glioma studies →

Open to participants now

9 of the 10 studies in Diffuse Intrinsic Pontine Glioma by Nationwide Children's Hospital are open now, in 7 countries. Recruiting first, the newest first:

3 more — sign in →

By country, each count listing its studies:

All 9 open studies →

Who these studies take

Of the 29 Diffuse Intrinsic Pontine Glioma studies recruiting now, 3 (10%) set no upper age limit and 26 (90%) stop at 75 or younger; 28 take children under 18; 2 take healthy volunteers.

This study: 12 Years to 39 Years · all sexes · no healthy volunteers.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 10 studies in Diffuse Intrinsic Pontine Glioma by Nationwide Children's Hospital, or all of them as a file.
02

Study summary

The goal of this study is to further evaluate feasibility and tolerability of Opdualag for patients with replication repair deficient HGG, including DIPG.

Read the detailed description

This is a multicenter, international study of post-radiotherapy (RT) fixed dose combination of nivolumab and relatlimab (Opdualag) to treat adolescent and young adult patients newly diagnosed with replication repair deficient (RRD) HGG and DIPG. The objectives of the study are to further evaluate feasibility and tolerability of Opdualag after RT, and to further characterize the safety and toxicity of Opdualag for patients with RRD HGG. We will also assess the progression free survival and overall survival distribution in patients.

Protocol maintenance therapy of Opdualag must begin no later than 56 days post-completion of RT. The earliest patients can begin protocol treatment is 28 calendar days post-completion of RT. Each cycle will be 28 days in duration and treatment can continue up to a total of 26 cycles. Opdualag will be given intravenously once every 4 weeks.

03

Conditions studied

  • High Grade Glioma
  • Diffuse Intrinsic Pontine Glioma
  • WHO Grade 3 Glioma
  • WHO Grade 4 Glioma
  • Replication Repair Deficient

Browse trials for

04

In context

Diffuse Intrinsic Pontine Glioma Reclassified

119 studies on the registry are indexed under Diffuse Intrinsic Pontine Glioma; 39 are open to participants now.

This study's planned enrollment of 12 is below the median of 30 across 109 interventional studies indexed under Diffuse Intrinsic Pontine Glioma.

Browse Diffuse Intrinsic Pontine Glioma studies →

Lead sponsor

Nationwide Children's Hospital is the lead sponsor of 233 studies on the registry; 43 are open to participants now.

Of its 17 completed or terminated interventional studies of FDA-regulated products, 9 (53%) have results posted.

Compared within Diffuse Intrinsic Pontine Glioma, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Glioma. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
12 Years to 39 Years
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

  • Patients must be ≥12 years and ≤39 years of age at the time of enrollment on TarGeT-SCR.
  • Within the United States, patients must weight ≥ 40 kg at the time of enrollment. For all other countries, patients must weight ≥ 30 kg at the time of enrollment.

Diagnosis:

  • Patients with newly-diagnosed HGG, including DIPG, are eligible. All patients mut have histologic confirmation from diagnostic or resection. The diagnosis of HGG, including DIPG must have been confirmed through TarGeT-SCR.
  • All HGGs must be WHO Grade 3 or 4. Note: WHO Grade 2 gliomas with pontine epicenter and diffuse involvement of at least 2/3 of the pons are eligible.

Disease Status:

  • Patients must be newly diagnosed.
  • is not required.
  • Patients with primary spinal tumors are eligible.
  • Patients should have no evidence of herniation or impending herniation, and no mass effect leading to severe midline shift.
  • Patients with prior are eligible.
  • disease is excluded.
  • Disseminated or multifocal disease: discussion with Study Chairs is required. Patients with multifocal disease who received upfront CSI are not eligible.

Demonstration of DNA replication repair deficiency (RRD) by fulfilling at least 2 of the following criteria:

  • Tumor mutational burden greater than or equal to 5 mutations/megabase (Intermediate and high TMB)
  • Genetic diagnosis of germline Constitutional Mismatch Repair Deficiency (CMMRD), Lynch Syndrome, or Polymerase-Proofreading Deficiency (PPD)
  • Validated functional genomic assay (e.g. LOGIC) confirming mismatch repair (MMR) deficiency
  • Immunohistochemistry (IHC) demonstrating loss of protein expression of any of the 4 MMR genes

Performance Level: ≥ 50 for patients > 16 years of age and Lansky ≥ 50 for patients ≤ 16 years of age

Prior Therapy for HGG:

  • Surgery, RT, and/or dexamethasone are permissible. Temozolomide administration is highly discouraged with concurrent RT, but permissible. Anti-VEGF treatment used for vasogenic edema or weaning is permitted. No other prior anticancer therapy for HGG will be allowed. Anti-VEGF use is well-established to not impact outcomes in HGG and is not considered as oncologic treatment but rather as a supportive measure to minimize steroid use in this setting. Discussion with Study Chairs is highly recommended.
  • RT requirements: Patients must have received photon or proton focal RT and administered at a standard dose, including:
  • 54 Gy in 30 fractions for DIPG
  • 54-59.4 Gy in 30-33 fractions for other HGG
  • 45-54 Gy for primary spinal cord HGG Note: Variances in RT dose within 10% of standard doses listed above are acceptable.
  • Timing between diagnosis and start of RT: Patients must have started RT \< 42 calendar days from initial diagnosis.
  • Timing post-RT: The earliest patent can begin protocl treatment is 28 days post-completion of RT. It is recommended treatment should begin within 25 days, however patients must start treatment on TarGeT-F no later than 8 weeks post-completion of RT.

Organ Function Requirements:

  • ≥ 1000/mm3
  • count ≥ 100,000/mm3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment).
  • > 8g/dL (may be transfused)
  • or radioisotope ≥ 70 mL/min/1.73 m2 OR serum creatinine based on age/gender as follows:

    10 to \< 13 years: 1.2 mg/dL for males and females 13 to \< 16 years: 1.5 mg/dL for males and 1.4 mg/dL for females

    • 16 years: 1.7 mg/dL for males and 1.4 mg/dL for females
  • /ALT \< 3 times the . For the purpose of this study, the ULN for ALT and AST is 45 U/L.
  • greater than or equal to 50% as measured by echocardiogram or multiple-gated acquisition
  • ≤ 480 msec (by Bazett formula)
  • Patients with seizure disorder may be enrolled if on anticonvulsants and well controlled.
  • TSH within institutional guidelines for normal range.

Exclusion criteria

Exclusion Criteria:

  • Pregnant or breastfeeding patients are excluded.
  • Patients with uncontrolled infection.
  • Patients with bone marrow failure syndrome.
  • Participants who, in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study.
  • Inflammatory bowel disease
  • Moderate to severe pulmonary conditions defined by need for medical intervention and/or limiting activities of daily living or shortness of breath with limited exertion.
  • Personal history of pneumonitis.
  • Cardiac conditions.
  • Patients with a history of severe or life-threatening adverse dermatologic reactions such as SJS or toxic epidermal necrolysis, or other severe reactions that have been associated with prior therapy.
  • Active tuberculosis
  • Active disease requiring systemic treatment in the past 2 years
  • Chronic infections with active disease
  • Personal known history of HPC who have not completed curative antiviral treatment
  • Personal known history of
  • Receipt of any organ transplantation
  • Treated with other within 1 year prior to enrollment with the exception of the following: curatively treated basal cell carcinoma, squamous cell carcinoma of the skin, and in situ cervical cancer.
  • Receipt of a live or within 4 weeks prior to enrollment
  • Previous treatment with relatlimab
  • Patients with ongoing or illness, medical or psychiatric conditions that, in the investigator's opinion, could affect the safety of the participant, or could impair assessment of the study's results are not eligible.
Terms in these criteria, in plain language(21)

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.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

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.

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.

Metastases

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

Karnofsky performance status (KPS)

A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.

Studies often ask for 60 or 70 and above. Your doctor gives the score.

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.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

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.

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.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

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.

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.

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.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

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.

06

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
12 participants (estimated)

Study arms

  • Experimental
    Opdualag Maintenance Therapy

    Post-RT Opdualag Maintenance Therapy

    Drug: Opdualag

Interventions

  • DrugOpdualag

    Fixed dose combination of relatlimab and nivolumab (Opdualag)

This study also gives Nivolumab. No intervention listed here names it: that was found by reading the record.

07

What researchers measure

Primary outcomes

  1. Number of Participants with Adverse Events, Immune Related Adverse Events, and Dose Modifying Toxicities as assessed by CTCAE v6

    Assess the feasibility of fixed dose combination of nivolumab and relatlimab as adjuvant therapy following radiation therapy in patients with newly diagnosed replication repair deficiency HGG. Adverse event data will be summarized in tables which will incorporate grade, attribution, and dose delays.

    Time frame: 4 years

  2. Number of participants that complete the first 3 cycles of maintenance therapy without experiencing dose modifying toxicities

    Assess the tolerability of fixed dose combination of nivolumab and relatlimab (Opdualag) as adjuvant therapy following radiation therapy in patients with newly diagnosed replication repair deficient HGG by quantifying the number of participants that complete at least the first 3 cycles of maintenance therapy without experiencing dose modifying toxicities that require permanent discontinuation of Opdualag therapy.

    Time frame: 4 years

Secondary outcomes

  1. Progression Free Survival in HGG

    Estimate PFS distribution for patients with newly diagnosed RRD-HGG who received Opdualag following RT compared to molecularly stratified and matched historical controls

    Time frame: Day 1 of treatment until date of Progressive Disease or death due to any cause or date of last follow-up, assessed up to 5 years

  2. Overall Survival in HGG

    Estimate overall survival distribution for patients with newly diagnosed RRD-HGG who receive Opdualag following RT compared to molecularly stratified and matched historical controls.

    Time frame: Day 1 of treatment until date of death due to any cause or date of last follow-up, assessed up to 5 years

  3. Correlations between genomic tumor alterations with radiographic response

    Explore longitudinal associations of genomic, transcriptomic, epigenetic, and/or immunologic alterations of tumor at diagnosis, recurrence, or autopsy with radiographic response and advanced neuro-imaging measures. Incidence of significant genomic/transcriptomic/epigenetic and/or immunologic alterations found by sequencing and proteomics will be correlated with percent of patients that achieve radiographic responses using RAPNO guidelines.

    Time frame: Diagnosis until date of death due to any cause or date of last follow-up, assessed up to 5 years

  4. Evaluate health-related quality of life outcomes using PROMIS questionnaire

    Using PROMIS questionnaire, evaluate health-related quality of life outcomes of patients newly diagnosed with RRD-HGG from diagnosis through the end of treatment.

    Time frame: From diagnosis through the end of treatment with Opdualag, usually 2 years per patient

08

Study locations

No study locations are listed for this record.

09

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Mar 2027; primary completion for Mar 2033, 72 months later.

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

Registered
May 29, 2026
First posted
Jun 12, 2026
StartEst.
Mar 1, 2027
Primary completionEst.
Mar 1, 2033
CompletionEst.
Mar 1, 2038
Last update
Sep 9, 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 Sep 9, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT07644312
Responsible party
Sponsor
First posted
Jun 12, 2026
Start date
Mar 1, 2027 (estimated)
Primary completion
Mar 1, 2033 (estimated)
Completion
Mar 1, 2038 (estimated)
Last update
Sep 9, 2026

Study contacts

Kelsey Troyer, PhD
Contact
kelsey.troyer@nationwidechildrens.org
6147223284

Oversight

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

Not currently enrolling

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

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Discussion

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Studies of the drug tested here: Nivolumab

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