5G-RUBY: Avutometinib and Defactinib in Malignant Brain Tumours

Registration Number
NCT06630260
Lead Sponsor
Institute of Cancer Research, United Kingdom
Brief Summary

The purpose of this clinical trial is to evaluate the safety and tolerability of avutometinib and defactinib and to determine the preliminary antitumour activity of avutometinib and defactinib administered at the recommended Phase 2 dose (RP2D). In the Phase 1b of this study parallel biomarker defined arms will be opened, initially in the relapsed GMB settin...

Detailed Description

The clinical trial will be divided into two parts: Phase 1b (proof of concept of hypothesis-driven biomarker-guided therapies) and Phase 2 (preliminary efficacy testing).
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Recruitment & Eligibility

Status
RECRUITING
Sex
All
Target Recruitment
182
Inclusion Criteria

Phase 1b

  1. Patients with histologically confirmed advanced WHO Stage IV glioblastoma (per fourth edition 2016). Per the new 2021 fifth edition of WHO Classification of Tumours of the Central Nervous System, this will include:

    • Glioblastoma, IDH-wildtype Grade 4
    • Astrocytoma, IDH-mutant, Grade 4 (lower Grade 2/3 are not included)
    • Diffuse hemispheric glioma, H3 G34 mutant Grade 4

    Patients with any other CNS tumours will only be eligible for defined Phase 2 biomarker arms once a Phase 1b GO decision has been met. Specific eligibility criteria for these tumours will be defined following an amendment.

  2. Patients for Phase 1 will need to have consented to the Minderoo Precision Brain Tumour Programme and have available whole genome, and transcriptome data available.

  3. Patients for the relapsed cohorts will be eligible at first relapse following completion of optimal surgery, and Stupp based adjuvant chemo-radiotherapy (or equivalent). They will need to have measurable disease per RANO or evaluable disease.

  4. Patients for the front line minimal residual disease (mrd) cohort will be eligible following completion of optimal surgery and Stupp based adjuvant chemoradiotherapy as long as they meet all other inclusion/exclusion criteria.

  5. 16 years or over

  6. Life expectancy of at least 12 weeks.

  7. World Health Organisation (WHO) performance status of 0-1

  8. Neurologically stable (e.g., without a progression of neurological symptoms or requiring escalating doses of systemic steroid therapy within the last week)

  9. Written (signed or dated) informed consent and be capable of co-operating with treatment and follow up

  10. Haematological and biochemical indices within the ranges shown below. These measurements must be performed within one week prior to the first dose of either IMP

    Haemoglobin (Hb): ≥ 9.0 g/dL Absolute neutrophil count: ≥1.5 x 10^9/L Platelet count: ≥100 x 10^9/L Coagulation: INR <1.5 and APTT <1.5x if not anticoagulated INR stable > 7 days within intended therapeutic range if anticoagulated Bilirubin: Within institution normal ranges Alanine aminotransferase (ALT) and aspartate aminotransferase (AST): <3 x ULN Albumin: ≥ 28 g/dL Creatinine: <1.5 x ULN Sodium: ≥130 mmol/L Potassium, Calcium, Magnesium, phosphate: Within institution normal ranges (replacement is permitted) Urinary protein: < 1+ on dipstick

  11. Female patients with reproductive potential must have a negative serum pregnancy test within 14 days prior to start of trial.

  12. Men and women of childbearing potential must agree to comply with the use of a highly effective method of contraception to avoid impregnating a partner or becoming pregnant, respectively, during the study, and for at least 150 days after the last dose of either investigational drug.

Exclusion Criteria Phase 2

  1. Receipt of treatment before the first dose of study drug (Cycle 1 Day 1) within an interval shorter than the following, as applicable:

    • Cytotoxic chemotherapy during the prior 2 weeks or 6 weeks for nitrosoureas
    • Bevacizumab during the prior 6 weeks
    • Five half-lives of any small molecule investigational or licensed medicinal product.
  2. Prior immune checkpoint inhibitor therapy or vaccine therapy is not permitted. Prior use of any other immune-modulatory investigational agent must be discussed with sponsor team and CI. Prior use of BRAF or MEK inhibitors is not permitted.

  3. Ongoing Grade 2 or greater toxicities from pre-existing conditions or from previous treatments.

  4. Patients with carcinomatous meningitis, leptomeningeal spread of tumour, spread of tumour to the brain stem or spinal cord.

  5. Has evidence of recent intratumoural or peritumoural haemorrhage on baseline MRI. Patients with radiological findings that are stable on at least 2 consecutive MRI scans at least 3 weeks apart will be eligible.

  6. History of clinically relevant bleeding disorders, including significant GI bleeding within last 6 months.

  7. History of arterial thromboembolism.

  8. Recent (within 3 months) deep vein thrombosis or pulmonary embolism or another significant thromboembolism. Venous port of catheter thrombosis or superficial thrombosis are not considered significant. Patients with prior thrombosis (> 3 months ago) on stable anticoagulation are permitted to be enrolled. Patients on Warfarin will need to be converted onto low-molecular weight-based heparin therapy.

  9. History of clinically significant cardiac disorders:

    • Myocardial infarction, or New York Heart Association Class II to IV congestive heart failure, within 6 months of the first dose of study drug
    • Concurrent and clinically significant abnormalities on ECG at Screening, including a corrected QT interval (QTcF >460ms).
  10. History of malabsorption syndrome or other conditions that may interfere with enteral absorption. Patients with a history of or active inflammatory bowel disease (e.g., Crohn's disease or ulcerative colitis). Patients with acute or chronic pancreatitis. History of gastrointestinal perforation or fistulae. Patients with known Gilbert's syndrome will be excluded from this study.

  11. Concurrent ocular disorders:

    1. Patients with history of glaucoma, history of retinal vein occlusion (RVO), predisposing factors for RVO, including uncontrolled hypertension, uncontrolled diabetes
    2. Patient with history of retinal pathology or evidence of visible retinal pathology that is considered a risk factor for RVO, intraocular pressure > 21 mm Hg as measured by tonometry, or other significant ocular pathology, such as anatomical abnormalities that increase the risk for RVO.
    3. Patients with a history of corneal erosion (instability of corneal epithelium), corneal degeneration, active or recurrent keratitis, and other forms of serious ocular surface inflammatory conditions.
  12. Has urine protein > 1g/24 hours. Participants with >1+ on urine dipstick testing will undergo 24-hour urine collection for quantitative assessment of proteinuria.

  13. Has significant lung disease including pneumonitis, interstitial lung disease, idiopathic pulmonary fibrosis, cystic fibrosis, active tuberculosis, or history of opportunistic infections (including PCP or CMV pneumonia).

  14. Known to be serologically positive for hepatitis B, hepatitis C or human immunodeficiency virus (HIV).

  15. Steroid requirement for neurological symptom control of > 3mg Dexamethasone per day (patients will allowed to enrol if they have been on a stable dose of steroids of equivalent or less than 3mg Dexamethasone for at least 5 days prior to Day 1 of Cycle 1).

  16. Has received a live vaccine within 30 days of planned start of study therapy. Note: inactive vaccines including COVID vaccines are allowed prior to 1 week of Day 1 of Cycle 1).

  17. Current active concurrent malignancy. Cancer survivors who have undergone potentially curative therapy for a prior malignancy, have no evidence of that disease recurrence for three years or more and are deemed at negligible risk of recurrence will be eligible.

  18. Is a participant or plans to participate on another interventional clinical trial while taking part in this Phase 1 study. Participation in an observational trial would be acceptable.

  19. Exposure to medications (with or without prescriptions), supplements, herbal remedies, or foods with potential for drug-drug interactions with study interventions within 14 days prior to the first dose of study intervention and during the course of therapy, including:

    1. Strong CYP3A4 inhibitors or inducers, due to potential drug-drug interactions with both avutometinib and defactinib.
    2. Strong CYP2C9 inhibitors or inducers, due to potential drug-drug interactions with defactinib. Not applicable if and when patients randomized to avutometinib monotherapy.
    3. Strong P-glycoprotein (P-gp) inhibitors or inducers, due to potential drug-drug interactions with both avutometinib and defactinib.
    4. Strong breast cancer resistance protein (BCRP) inhibitors or inducers, due to potential drug-drug interactions with avutometinib.
  20. Major surgery within 4 weeks (excluding placement of vascular access), minor surgery within 2 weeks, or palliative radiotherapy within 1 week of the first dose of defactinib.

  21. Any other condition which in the investigator's opinion would not make the patient a good candidate for the clinical trial.

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Exclusion Criteria

Not provided

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Study & Design

Study Type
INTERVENTIONAL
Study Design
PARALLEL
Arm && Interventions
GroupInterventionDescription
Phase 2AvutometinibThe Phase 2 part of the study will determine the antitumour activity of investigational agents administered at the RP2D in patients with molecularly defined malignant brain tumours. Avutometinib and defactinib may be administered in combination with temozolomide (TMZ).
Phase 2DefactinibThe Phase 2 part of the study will determine the antitumour activity of investigational agents administered at the RP2D in patients with molecularly defined malignant brain tumours. Avutometinib and defactinib may be administered in combination with temozolomide (TMZ).
Phase 1bDefactinibThe Phase 1b will evaluate the safety and tolerability of combination of avutometinib and defactinib and determine its preliminary antitumour activity when administered at the recommended Phase 2 dose (RP2D) in patients with molecularly defined malignant brain tumours.
Phase 1bAvutometinibThe Phase 1b will evaluate the safety and tolerability of combination of avutometinib and defactinib and determine its preliminary antitumour activity when administered at the recommended Phase 2 dose (RP2D) in patients with molecularly defined malignant brain tumours.
Phase 2TemozolomideThe Phase 2 part of the study will determine the antitumour activity of investigational agents administered at the RP2D in patients with molecularly defined malignant brain tumours. Avutometinib and defactinib may be administered in combination with temozolomide (TMZ).
Primary Outcome Measures
NameTimeMethod
Phase 1b - To evaluate the safety and tolerability of investigational agent in patients with malignant brain tumours12 months

To identify the incidence, nature and severity of adverse events and laboratory abnormalities, with severity determined according to NCI CTCAE v5.0

Phase 1b - To determine the preliminary antitumour activity of the investigational agent administered at the RP2D in patients with molecularly defined malignant brain tumours12 months

Antitumour activity will be defined on the basis of the following outcomes. If any of the following occur, patients will be considered to have clinically benefitted:

For relapsed GBM:

Achievement of overall response of CR or PR per Response Assessment in Neuro-Oncology (RANO) within 6 months or Free of disease progression or death at 6 months
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Phase 2 - To determine the antitumour activity of investigational agent administered at the RP2D in patients with molecularly defined malignant brain tumours9 months

Antitumour activity will be defined on the basis of the following outcomes:
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Secondary Outcome Measures
NameTimeMethod
Phase 1b - To identify molecular determinants of response and antitumour activity of the investigational agent in patients with molecularly selected brain tumours12 months

Determine biomarkers of response, including but not limited to genomic, transcriptomic or immunological signatures from responders and non-responders.

Phase 2 - To identify molecular determinants of response and antitumour activity of the investigational agent in patients with molecularly selected brain tumours9 months

Determine biomarkers of response, including but not limited to genomic, transcriptomic or immunological signatures from responders and non-responders from archival tumour samples

Phase 2 - To assess changes in Quality of Life over time9 months

OS12, defined as the percentage of patients who remained free of death at 12 months from study enrolment

Phase 2 - To assess safety and tolerability of combination with TMZ when given as standard of care maintenance therapy9 months

To identify the incidence, nature and severity of adverse events and laboratory abnormalities, with severity determined according to NCI CTCAE v5.0

Trial Locations

Locations (3)

Cambridge University Hospitals

🇬🇧

Cambridge, United Kingdom

The Royal Marsden Hospital - Drug Development Unit

🇬🇧

Sutton, United Kingdom

The Royal Marsden Hospital - Neuro-Oncology Unit

🇬🇧

Sutton, United Kingdom

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