Purpose: This study is for patients with malignant mesothelioma of the lung lining (called pleura) who are planning to have pemetrexed-cisplatin chemotherapy.
We are investigating whether giving a vaccine called TroVax® with pemetrexed-cisplatin chemotherapy is both safe and potentially beneficial in patients with mesothelioma. This vaccine has been used in combination with chemotherapy in other types of cancer and has been shown to be safe. Cancer vaccines work by stimulating the person’s immune system to fight the disease, in a similar way to the immune system fighting infection. In laboratory experiments, the vaccine has been shown to stimulate an immune response to a particular protein widely found on mesothelioma cells called 5T4. In patients with mesothelioma it is hoped that the vaccine will stimulate the immune system to attack mesothelioma cells carrying the 5T4 protein.
Pemetrexed-cisplatin chemotherapy is currently seen as the best treatment for patients with mesothelioma, and this is why we plan to combine it with the vaccine. It is hoped that the combination of the TroVax® vaccine and chemotherapy is more beneficial than chemotherapy alone.
Pemetrexed-cisplatin will be given into a vein in the arm (intravenously) every 3 weeks. The TroVax® vaccine will be given as an injection into the shoulder muscle (intramuscularly) 3 weeks before chemotherapy starts, one week before chemotherapy starts, then every 3 weeks. Each participant will receive 4 chemotherapy and 9 vaccine treatments if they complete the planned trial schedule. We aim to recruit 26 patients into the trial over a two year period. If this study shows that pemetrexed-cisplatin chemotherapy plus the TroVax® vaccine is safe and beneficial in terms of stimulating the immune system, the combination will be tested further in larger clinical trials.
- Arms: Experimental: TroVax®
- In this single-arm study, all participants will receive 9 injections of the TroVax® vaccine, plus standard cisplatin and pemetrexed chemotherapy.
- Interventions
- Biological: TroVax®: Dose of 1 x 10^9 TCID 50/ml, in 1ml, given on day 1 of weeks 1, 3, 6, 9, 12, 15, 18, 21, 24.
- Drug: Pemetrexed
500 mg/m^2 over 10 mins, given on day 3 of weeks 4, 7, 10, 13.
- Drug: Cisplatin
75mg/m^2 over 1 hour, given on day 3 of weeks 4, 7, 10, 13
- Dietary Supplement: Vitamin B12
1000μg intramuscular, Day 2 of weeks 3 and 12
- Dietary Supplement: Folic Acid
400μg oral daily from Day 2 of week 3 to Day 2 of week 16
- Drug: Dexamethasone
4mg BD, Days 2-6 of weeks 4, 7, 10, 13
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