This clinical trial is looking at a combination of drugs called vemurafenib and cobimetinib. Vemurafenib is approved as standard of care for adult patients with unresectable or metastatic melanoma. Cobimetinib is approved as standard of care in combination with vemurafenib for the treatment of adult patients with unresectable or metastatic melanoma. This means it has gone through clinical trials and been approved by the Medicines and Healthcare products Regulatory Agency (MHRA) in the UK. Cobimetinib and vemurafenib work in patients with these types of cancers which have certain changes in the cancer cells called BRAF V600 mutation-positive. Investigators now wish to find out if it will be useful in treating patients with other cancer types which are also BRAF V600 mutation-positive. If the results are positive, the study team will work with the NHS and the Cancer Drugs Fund to see if these drugs can be routinely accessed for patients in the future. This trial is part of a trial programme called DETERMINE. The programme will also look at other anti-cancer drugs in the same way, through matching the drug to rare cancer types or ones with specific mutations.
DETERMINE Treatment Arm 05 (vemurafenib and cobimetinib) aims to evaluate the efficacy of vemurafenib and cobimetinib in adult patients with rare\* cancers with BRAF V600 mutations or in common cancers where BRAF V600 mutations are considered to be infrequent. \*Rare is defined generally as incidence less than 6 cases in 100,000 patients or common cancers with rare alterations. This treatment arm has a target sample size of 30 evaluable patients. Sub-cohorts may be defined and further expanded to a target of 30 evaluable patients each. The ultimate aim is to translate positive clinical findings to the NHS (Cancer Drugs Fund) to provide new treatment options for rare adult cancers. OUTLINE: Pre-screening: The Molecular Tumour Board makes a treatment recommendation for the patient based on molecularly-defined cohorts. Screening: Consenting patients undergo biopsy and collection of blood samples for research purposes. Treatment: Patients will receive vemurafenib and cobimetinib until disease progression without clinical benefit, unacceptable adverse events (AEs) or withdrawal of consent. Patients will also undergo collection of blood samples at various intervals while receiving treatment and at End of Treatment (EoT). After completion of study treatment, patients are followed up every 3 months for 2 years. THE DETERMINE TRIAL MASTER (SCREENING) PROTOCOL: Please see DETERMINE Trial Master (Screening) Protocol record (NCT05722886) for information on the DETERMINE Trial Master Protocol and applicable documents.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
30
Patients will receive vemurafenib at a dose of 960 mg orally (four tablets of 240 mg) on a twice daily schedule throughout a 28-day cycle. Patients may continue until disease progression without clinical benefit, unacceptable AEs or withdrawal of consent.
Patients will receive cobimetinib at a dose of 60 mg (three tablets of 20 mg) to be taken orally, once daily for 21 consecutive days (days 1 to 21 in each 28-day cycle); followed by a 7-day break. Patients may continue until disease progression without clinical benefit, unacceptable AEs or withdrawal of consent.
Belfast City Hospital
Belfast, United Kingdom
RECRUITINGUniversity Hospital Birmingham
Birmingham, United Kingdom
RECRUITINGBristol Haematology and Oncology Centre
Bristol, United Kingdom
RECRUITINGAddenbrooke's Hospital
Cambridge, United Kingdom
RECRUITINGVelindre Cancer Centre
Cardiff, United Kingdom
RECRUITINGWestern General Hospital
Edinburgh, United Kingdom
RECRUITINGThe Beatson Hospital
Glasgow, United Kingdom
RECRUITINGLeicester Royal Infirmary
Leicester, United Kingdom
RECRUITINGUniversity College London Hospital
London, United Kingdom
RECRUITINGGuy's Hospital
London, United Kingdom
RECRUITING...and 6 more locations
Objective Response (OR)
An OR is defined as the confirmed occurrence of either a Complete Response (CR) or Partial Response (PR) according to Response Evaluation Criteria in Solid Tumours (RECIST) Version 1.1 criteria (or immune related \[ir\]-RECIST or standard imaging criteria for specific disease e.g. Response Evaluation in Neuro Oncology criteria \[RANO\]). In patients with leukaemia, OR will be defined as the occurrence of CR, CRi (CR with incomplete neutrophil recovery) or CRp (CR with incomplete platelet recovery). The trial will report the proportion of patients with an OR and 95% credible interval.
Time frame: Disease assessments to be performed up to 24 weeks from the start of trial treatment.
Durable Clinical Benefit (DCB)
DCB is defined as the absence of disease progression for at least 24 weeks from the start of trial treatment according to RECIST Version 1.1 criteria (or ir-RECIST or standard imaging criteria for specific disease e.g. RANO criteria) and, where relevant (e.g. for haematological malignancies), by standard bone marrow response assessment criteria. Alternative definitions of DCB based on different time points may be pre-specified for particular sub-cohorts if 24 weeks is not clinically relevant. The trial will report the proportion of patients with a DCB and 95% credible interval.
Time frame: Disease assessments to be performed up to 24 weeks from the start of trial treatment.
Duration of response (DR)
DR is defined as the time from the date of the first confirmed CR or PR according to RECIST 1.1 or ir-RECIST (or standard imaging criteria for specific disease e.g. RANO criteria) to the date of disease progression. The trial will report the median DR and 95% credible interval.
Time frame: Disease assessment every 2 cycles (each cycle is 28 days) and at EoT. After 24 weeks, it can be done every 12 weeks, on discussion with Sponsor. Follow-up visits occur every 3 months after last dose of vemurafenib and cobimetinib for up to 2 years.
Best percentage change in sum of target lesion / index lesion diameters (PCSD)
PCSD is defined as the greatest decrease or least increase in the sum of target lesion diameters (RECIST) or index lesion diameters (irRECIST) as a percentage compared to the baseline measurement. The trial will report the mean PCSD and 95% credible interval.
Time frame: Disease assessment every 2 cycles (each cycle is 28 days) and at EoT. After 24 weeks, it can be done every 12 weeks, on discussion with Sponsor. Follow-up visits occur every 3 months after last dose of vemurafenib and cobimetinib for up to 2 years.
Time to treatment discontinuation (TTD)
TTD is defined as the time from date of starting trial treatment to date of discontinuing trial treatment, in days estimated by the median of the posterior inverse gamma probability distribution. The trial will report the median TTD and 95% credible interval.
Time frame: From first dose of vemurafenib and cobimetinib to discontinuation of trial treatment up to 5 years.
Progression-Free Survival time (PFS)
PFS is defined as the time from date of starting trial treatment to date of progression or date of death without a previous progression recorded estimated by the median of the posterior inverse gamma probability distribution.
Time frame: Disease assessment every 2 cycles (each cycle is 28 days) and at EoT. After 24 weeks, it can be done every 12 weeks, on discussion with Sponsor. Follow-up visits occur every 3 months after last dose of vemurafenib and cobimetinib for up to 2 years.
Time to Progression (TTP)
TTP is defined as the time from date of starting trial treatment to date of progression or date of death without recorded progression censored rather than events. The trial will report the median TTP and 95% credible interval.
Time frame: Disease assessment every 2 cycles (each cycle is 28 days) and at EoT. After 24 weeks, it can be done every 12 weeks, on discussion with Sponsor. Follow-up visits occur every 3 months after last dose of vemurafenib and cobimetinib for up to 2 years.
Growth Modulation Index (GMI)
GMI is defined as the ratio of TTP with the trial protocol treatment to TTP on the most recent prior line of therapy. The trial will report the mean GMI and 95% credible interval.
Time frame: Disease assessment every 2 cycles (each cycle is 28 days) and at EoT. After 24 weeks, it can be done every 12 weeks, on discussion with Sponsor. Follow-up visits occur every 3 months after last dose of vemurafenib and cobimetinib for up to 2 years.
Overall Survival time (OS)
OS is defined as the time from date of starting trial treatment to date of death from any cause estimated by the median of the posterior normal probability distribution.
Time frame: Time of death or up to 2 years after the EoT visit.
Occurrence of at least one Suspected Unexpected Serious Adverse Reaction (SUSAR)
The trial will report the number of patients who experience at least one SUSAR to vemurafenib and cobimetinib.
Time frame: From the time of consent until 28 days after last dose of vemurafenib or cobimetinib (up to 5 years) or until patient starts another anti-cancer therapy, whichever came first. An average time frame will be presented with results entry.
Occurrence of at least one Grade 3, 4 or 5 vemurafenib and/or cobimetinib related AE
Number of patients who experience at least one vemurafenib and/or cobimetinib related Grade 3, 4 or 5 AE according to National Cancer Institute Common Terminology Criteria for Adverse Events Version 5.0.
Time frame: From the time of consent until 28 days after last dose of vemurafenib or cobimetinib (up to 5 years) or until patient starts another anti-cancer therapy, whichever came first. An average time frame will be presented with results entry.
EORTC-QLQ-C30 Standardised Area Under Summary Score Curve (QLQSAUC)
Multiple measures of Quality of Life (QoL) will be generated from patient completion of the European Organisation for Research and Treatment of Cancer QLQ-C30 (EORTC-QLQ-C30) questionnaire (15 measures). For each patient the Summary Score from the questionnaire will be generated at each time point and the area under the curve generated by these scores over time will be calculated and standardised by the time frame. The trial will report the mean QLQSAUC and 95% credible interval.
Time frame: QoL surveys performed prior to inclusion, every cycle (each cycle is 28 days) and at EoT visit (up to 5 years).
EQ-5D Standardised Area Under Index Value Curve (EQ5DSAUC)
Two measures of QoL will be generated from patient completion of the EQ-5D-5L questionnaire. For each measure, scores based on responses from the questionnaire will be generated at each time point and the area under the curve generated by these scores over time will be calculated and standardised by the time frame. The trial will report the mean EQ5DSAUC and 95% credible interval.
Time frame: QoL surveys performed prior to inclusion, every cycle (each cycle is 28 days) and at EoT visit (up to 5 years).
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