RE: Modi-1 Trial Questions11 Jul 2022 16:47
Konar,
In answer to your 14.30:-
1) I believe that originally the first 2 cohorts were to receive a low and then high dose of vimentin peptides only. That has now changed. Cohort 1 = low dose vimentin peptides, Cohort 2 = high dose of the full Modi-1 vaccine ie. vimentin and enolase peptides. Each of these cohorts will consist of 3 to 6 patients. So in effect the high dose vimentin only cohort has been removed which will speed up the trial.
2) I don't believe a safety run-in is required for each cancer type, however there will also be a 3rd and 4th safety cohort for the combination of Modi-1 and the PD-1. So Cohort 3 = Modi1 plus standard of care PD-1 low dose, Cohort 4 = Modi1 plus SOC PD-1 high dose, again each cohort will be between 3 and 6 patients.
3) Cohorts 3 and 4 can only commence when cohort 2 has been completed and shows that Modi-1 is safe enough to continue. As I understand it this won't hold the trial up as they can simultaneously move to the expansion phase in ovarian and breast cancer where Modi-1 is being used as a monotherapy.
4) I'm not sure how long before the green light is given to escalate the dose and move onto the next cohort. If it's any help, with SCIB1, dose escalation was approved when the first 3 patients had received their 3rd dose which was at 6 weeks but the situation with Modi1 may be completely different and obviously this question would be one for SA or LD.
5) I'd hope that Scancell would issue an RNS as and when they are authorised to move through the dose escalation cohorts.
6) I may have been particularly slow but it wasn't immediately obvious on clinicaltrials.gov and in case anyone else was wondering, Modi-1 = all 3 peptides including enolase and Modi-1v = vimentin only peptides.
Hope this helps.