MIA: This phase II trial is evaluating 3 different drug combinations for advanced melanoma treatment and prevention of recurrenceA Phase II, Randomised, Open Label Study of Neoadjuvant Dabrafenib, Trametinib and / or Pembrolizumab in BRAF V600 Mutant Resectable Stage IIIB/C Melanoma

Exclusion

• In transit disease
• Uveal or mucosal melanoma.

• Prior anti-cancer treatment for melanoma, except for the following:

  1. surgery for a primary melanoma or previous stage III melanoma,
  2. adjuvant radiotherapy to the primary melanoma resected site or to lymph nodes for previous Stage III disease,
  3. previous adjuvant interferon or ipilimumab for resected stage II or III melanoma, Previous adjuvant treatment with PD-1 inhibitors or BRAF/MEK inhibitors is not permitted.
• Received any investigational drug within 28 days or 5 half-lives of the planned first dose of this study treatment.
• Known immediate or delayed hypersensitivity reaction or idiosyncrasy to drugs chemically related to the study treatments, their excipients and / or dimethyl sulfoxide (DMSO).
• Active infection requiring systemic therapy.
• Current use of any prohibited medication as described in protocol.

• Active autoimmune disease or a documented history of autoimmune disease or a syndrome requiring systemic steroids or immunosuppressive agents. Patients with the following are permitted to enrol:

  1. vitiligo,
  2. type I diabetes mellitus,
  3. residual hypothyroidism due to an autoimmune condition only requiring, and stable on hormone replacement,
  4. psoriasis not requiring systemic treatment,
  5. resolved childhood asthma or atopy,
  6. or conditions not expected to recur in the absence of an external trigger.
• A requirement for chronic systemic steroid therapy (> 10mg/kg per day of prednisone or equivalent) within two weeks before the planned first dose of study treatment or any on any other form of immunosuppressive treatment. Patients who require inhaled or intranasal corticosteroids (with minimal systemic absorption) may be continued if the patient is on a stable dose. Non-absorbed intra-articular steroid injections will also be permitted.

• A known history of another malignancy or concurrent malignancy unless the patient is disease-free for a minimum of 1 year, is completely treated and at low-risk of recurrence. The time requirement does not apply for patients with successful definitive resection or curative treatment of:

  1. Non-melanoma skin cancer (e.g. basal cell or squamous cell carcinoma of the skin),
  2. superficial bladder cancer,
  3. in situ carcinoma of the cervix,
  4. in situ breast cancer,
  5. atypical melanocytic hyperplasia or melanoma in situ
  6. other in situ carcinomas,
  7. multiple primary melanomas, or other treated low risk tumours.
• Known HIV, hepatitis B or C virus positive status or history of active tuberculosis (testing prior to randomisation is not required).
• Administration of a live vaccine with 30 days of planned first dose of study treatment. Seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed, however intranasal influenza vaccines (e.g., Fluad®) are live attenuated vaccines, and are not allowed. Any vaccine is cautionary within 30 days.

• Patients with a history or evidence of cardiovascular risk including any of the following:

  1. QT interval corrected for heart rate using the Bazett formula ≥480 msec, a diagnosis of long QT syndrome (Roman-Ward or Jervell Lange-Nielsen syndromes)
  2. Taking medications known to prolong the QT interval.
  3. Uncorrectable electrolyte abnormal abnormality (e.g. hypo- or hyperkalaemia, hypomagnesaemia, hypocalcaemia)
  4. Uncontrolled arrhythmias, with the exception of atrial fibrillation which is controlled for > 30 days prior to randomisation.
  5. Patients with implanted cardioverter/defibrillators.
  6. Acute coronary syndromes (including myocardial infarction or unstable angina), coronary angioplasty or stenting within 6 months prior to randomisation.
  7. A history or current evidence of New York Heart Association (NYHA) ≥Grade 2 congestive heart failure
  8. A current left ventricular ejection fraction (LVEF) below than the lower limit of normal (LLN).
  9. Any abnormal cardiac valve morphology documented by echocardiogram which in the opinion of the investigator could interfere with the patient's safety.
  10. Treatment-refractory hypertension defined as a systolic blood pressure of >140 mm Hg and/or a diastolic pressure of >90 mm Hg, which cannot be controlled by anti-hypertensive treatment.

• Evidence or a risk of retinal vein occlusion (RVO) or central serous retinopathy (CSR), including:

  1. Presence of predisposing factors to RVO or CSR (e.g., uncontrolled glaucoma or ocular hypertension, uncontrolled hypertension, uncontrolled diabetes mellitus, or a history of hyperviscosity or hypercoagulability syndromes).
  2. Visible retinal pathology as assessed by ophthalmic examination that is considered a risk factor for RVO or CSR, such as evidence of new optic disc cupping.
  3. Intraocular pressure > 21 mm Hg as measured by tonography.
  4. Evidence of new visual field defects on automated perimetry.
• History or evidence of interstitial lung disease or active non-infectious pneumonitis.
• Serious or unstable pre-existing medical conditions or other conditions that could interfere with the patient's safety, consent, or compliance.
• Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
• Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or an agent directed to another co-inhibitory T-cell receptor (i.e. OX-40, CTLA-4).