Kevin Boyle
Analyst · Laidlaw & Company. Your line is open, please go ahead.
Thanks, Yale. So, let me touch on a few things. We are encouraged but not surprised that we are moving to the second dose level. That's why we designed the trial as we did, with this patient design. So, as a reminder, our approach targeting these hotspot mutations, we believe, is superior to other TCR companies because these mutations only appear in the tumor cells, nowhere on healthy tissues, and that's an important reminder. And that's what allowed us, in part, to start at a higher dose level. So, dose level 1 already based on a very broad literature review that was done by the team, efficacious dose levels begin at 1 billion TCR-T cells. And so, the fact that we're starting at 5 billion TCR-T cells, we're not starting at a throwaway dose level. Absolutely, in a Phase 1 trial safety is first and foremost the most important thing. And then we want to identify the recommended Phase 2 dose. But again, we're very encouraged because we are targeting things that these new antigens, these hotspot mutations only appear in the tumor, what's causing the tumor to survive, what's causing the tumor to thrive. And so, the fact that our TCRs can identify them and kill what is driving the cancer; we're going after the right target and we're doing so in a very safe manner because it's not honing to any kind of healthy tissue. And so, I just can't stress that enough. So, it is looking at the data of the [technical difficulty] patient or patients that were treated. And we did indicate on a prior call that the safety profile from the first patient looked very good, and that was going to be reviewed and assessed by the safety review board and by our investigators after the first patient. So, we did talk about that before and say that again, that we are very pleased with the safety profile that we saw in the first patient. And it is safety and the responses in the first 30 days after infusion that is evalued each and every time by our safety review board and the investigators as we determine the appropriate dose for the next patient to be treated.