Laurence Cooper
Analyst · Griffin Securities. Your line is now open
Thanks, David. We're thrilled to have you on board and to be in a position to leverage your leadership and experience, focusing importantly on business development and corporate strategy. It's certainly an exciting time for ZIOPHARM in the months and the years ahead. So let's go to Slide 6, our pipeline slide. And I'm really going to highlight here 3 programs. The first is the adenoviral program. And just to make sure we're all oriented according to the nomenclature, Ad is adenovirus, RTS is the RheoSwitch and hIL-12 is human IL-12. So we're advancing this adenoviral program for the controlled delivery of IL-12 for the treatment of glioblastoma; and importantly, recurrent glioblastoma. Since our last call, we have developed and publicly presented additional evidence that supports the mechanism of action as well as the survival benefit and we have, I think, significantly, really exciting presentations at SNO coming later this month. ZIOPHARM's breaking new ground here, as we're the first company to demonstrate control and modulation of IL-12, this critically important protein that David mentioned, for stimulating an effective immune response from the brain. In the CAR programs -- and the CAR, of course, stands for chimeric antigen receptor -- in the CAR programs we're seeing progress towards our stated goal of reducing the manufacturing times of these genetically modified cells with the non-viral Sleeping Beauty technology. With our first- and second-generation trials at MD Anderson, we have reduced manufacturing of the CAR-modified T cells down to 2 weeks. But we're not stopping there. We're moving into the clinic in 2018 with very rapid manufacturing, under 2 days. This, again, will be a new standard for the field, achieving this very rapid manufacturing. We call this our point-of-care technology and we think this is a game-changer for the field of T-cell therapy. Our TCR program, or T-cell receptor program, listed underneath, is in collaboration with Dr. Steven Rosenberg at the NCI. This is an exciting approach that leverages the same Sleeping Beauty system, but in this case we're genetically modifying the T cells with T-cell receptors targeted to neoantigens. And these are unique to each patient's cancer, and importantly, each patient's solid tumor. This puts us on the map, therefore, and on the pathway to targeting that 1.5 million people with invasive cancers that David talked about. And we're doing so with the best in the business. We're going after antigens which give rise to cancer. In other words, we're targeting neoantigens and we're tackling, therefore, the root of the problem. Steve and his team have made significant progress and expect to be in the clinic in 2018. These neoantigen technologies are among the most fascinating and fast-moving subfields in immuno-oncology and we're really delighted to be working with the NCI on this. Regarding our NK cell program, given all of what we're doing and all the excitement we have with these other programs, we're turning our energy to focus on the genetically modified NK cells moving forward. So in summary for this slide, before I really get into the specifics of the program I want to reiterate that the programs of adenovirus, the point-of-care CAR and the TCR -- these 3 are the top priorities for ZIOPHARM and, we think, the value drivers for our company. So the next slide is the transition slide, Slide 7, as I get into gene therapy. More and more, we're building the case with clinical evidence that the adenoviral program for the controlled delivery of IL-12 using the small molecule activator called veledimex not only extends survival of these very sick patients with recurrent glioblastoma -- and I would add, more so than any therapeutics to come before us. But it's becoming increasingly clear that the ability of IL-12 and to control IL-12 will give neuro-oncologists and patients alike a much-needed therapy when others have failed. So let's look at Slide 8, and I want to update you on where things stand with our glioblastoma program. And to put this program in context, we really called out the new information and data since our last call. And significantly, we've got 3 lines of evidence that show why the patients with recurrent glioblastoma benefit from the immunotherapy -- in other words, the controlled production of IL-12. The first kind of major bullet point I want to get across is that we're seeing antitumor effects in the brain. In May -- and this was the data associated with ASCO -- we announced there was a 12.5-month median overall survival at 8 -- an average follow-up of 9.2 months. And that really related to our Phase I trial, treating the patients with recurrent glioblastoma. Since then, we're seeing increasing evidence that we've indeed, as we expected and as we hoped for, activated the immune system in the brain tumor. So we have 3 lines of evidence that really point to that. The first line is that patients who received low-dose systemic steroids, and -- which is given really for their postoperative management, had a better survival rate than those who received elevated steroids, as the latter presumably interferes with the immune activation driven by IL-12. And indeed, as I reported earlier, there's 100% survival -- 100% survival for patients with recurrent GBM who received this lowest dose of steroids in the context of IL-12 therapy. Furthermore, the survival appears to be directly correlated to a ratio of these effector -- in other words, these killer T cells -- to the suppressor T cells -- that ratio. And we can measure that ratio in the peripheral blood. And again, as one increases that ratio, the patients appear to be surviving longer which, again, is consistent with IL-12-mediated immune activation. And then we've also seen control. There's no doubt that the switch now can tune or modulate the levels of IL-12 and the associated immune response. And really, one of the kind of major strengths also to highlight from our data is that drug-related adverse events in the Phase 1 trial were entirely predictable, rapidly reversible by the simple stopping of the veledimex. So on the next slide, Slide 9, let's look at some really, I think, remarkable data. So we've had the opportunity with our physician colleagues to biopsy brain tumors in 3 patients. And this is many weeks after the completion of veledimex. And you can see, for instance, there's a crosshair -- there's a red crosshair on your screen that is highlighting a lesion in somebody's brain. And when the neurosurgeon goes into that lesion, remarkably, we see a new infiltration of these CD8 or in other words killer T cells. And these T cells are not just sitting there. They are being called to fight. And we can see that because they're making a powerful cytokine called gamma interferon. In other words, IL-12 has engaged these T cells to be active and engaged them, importantly, in the fight against the glioblastoma. There's also another major bullet on this slide, and that is that we have remarkable data showing that the glioma lesions in these patients are getting smaller after our Il-12 therapy. So these data provide us further confidence that what we're seeing is indeed a beneficial effect of IL-12. Not only do we see survival data, but we increasingly understand why these recipients are surviving. And there's no question that the switch is working, and now I think there's no question that the IL-12 is working. So on Slide 10, we're really thrilled to be able to update you in about 2 weeks from now at the Society of Neuro-Oncology in San Francisco, where we're going to be presenting additional data. Dr. Chiocca and he's the Chief of Neurosurgery at Harvard -- he's going to update you on our progress on our Phase I study. And his presentation will include a survival sweep -- the latest data, if you would, in terms of the survival on that Phase I trial to evaluate the adenoviral program with the activator ligand veledimex in treating patients with recurrent glioblastoma. And again, just to kind of frame this, we last updated you in May when we announced the 12.5 months median overall survival. And obviously, more time has gone by, and we'll be delighted to update you further at SNO in terms of that survival data. And I think, significantly, his data will also reinforce the mechanism of action of how IL-12 is engaged in the immune system. I gave you a bit of a teaser, if you would, on the prior slide about how that's working. And I think once you see Dr. Chiocca's presentation it'll reinforce that the IL-12 is the actor -- is the way that these patients are surviving. Additionally at SNO, Dr. Stew Goldman is going to present an update on the trial design for our new Phase I study of adenovirus to control the delivery of IL-12 plus veledimex for the treatment of pediatric brain cancers. And as we announced last month, Dr. Goldman in Chicago has dosed the first patient on this trial. Because some of you will not be at SNO in San Francisco, the company will provide a conference call after these presentations to discuss these data, and we're really looking forward to doing so. So next slide, Slide 11 -- this -- so we're -- I think you'll see from this that we've really made terrific progress in advancing the adenovirus and the controlled production of IL-12 for gliomas. And the positive data keeps on coming from our Phase I trials, and indeed that's what I'm alluding to really at SNO. Our stereotactic Phase I trial in recurrent glioblastoma really broadens the population of patients who may be eligible for treatment. And delighted to say that's open and enrolling. And as I mentioned, the same with our pediatric trial, which is now open and enrolling, just as we discussed. We're really looking forward to initiating our combination trial with the anti-PD-1 agent later this year. And as a reminder, our preclinical data, where we combine tunable IL-12 with this immune checkpoint inhibitor yields 100% survival in the mice. Again, really encouraging data that makes us excited about opening that combination trial. And I think the point also on this slide is to really get to the pivotal trial here. And based on feedback from U.S. and regulatory agencies on our plans for the registration study, the company's going to initiate a randomized controlled trial this year. The Data Safety and Monitoring Board that will be associated with that trial will be reviewing the data that comes out of that trial at regular intervals and will have the opportunity to recommend various actions; and especially if the data looks good -- and we expect it to look good, including early study termination. We're really excited to start this randomized controlled trial, as we think it best addresses the needs of patients as well as the company. And I think the randomized controlled trial, quite frankly, gives us the best design for commercial success. As I've mentioned before, and I'll just highlight here, we're currently in discussions with more than one partner for this program and we'll be moving forward with these discussions. And as these strategic opportunities unfold, we're optimistic about the study and advancing IL-12 as a drug. Okay. So we're going to switch gears now to the cell therapy program. And this is Slide 12. And this again is our non-viral gene therapy platform to modify T cells. And we believe the genetic engineering of T cells will make future T-cell therapies faster and more effective than viral-based therapies. And we've developed this technology so that it's scalable and we can make T-cell therapy available to many, many more patients. So on Slide 13, this is a -- really a culling of some recent headlines that are in the lay press. And I think what that - what is struck - strikes me is that these recently-approved cell therapies are really quite costly, and the current manufacturing time comes in and is measured in weeks, somewhere between 17 and 20 days. And I think we've been very thoughtful here and have solutions for the very rapid manufacturing of T cells. In other words, we can address the issues of cost and scale of T cell therapies. So let's look on Slide 14 how we're going to do that. And here, ZIOPHARM is focused on point-of-care, or POC. And this is to achieve very rapid manufacturing in under 2 days. This, again, will be a new standard for the industry. And to get this done, we're focused 3 core technologies which are unique to us. The first is the Sleeping Beauty system -- this transfer of DNA rather than virus to genetically modified T cells. The second is the engineering of IL-15, this critical cytokine that provides a survival signal to T cells, and this allows the T cells that are genetically modified to be grown inside the patient rather than in manufacturing facilities. And the third part is the use of a switch -- the use of a switch to control the T cells after infusion. So on slide 15, we've broken this down into its component parts. And this was by design. This is how ZIOPHARM is tackling, essentially, the idea to provide a new standard for the production of T cells. So we've done this in 3 trials. And the first-generation trial is completed, and we're currently enrolling in the second-generation trial. And really, the team is thrilled to be on the cusp of entering the clinic with genetically modified T cells that can be manufactured in less than 2 days. Indeed, this -- we anticipate this point-of-care biology will enter the clinic next year. As a reminder, our initial trials using the first-generation CAR were with 4-week manufacturing, and that showed favorable survival of patients with lymphoma and leukemia. And as David mentioned in his opening remarks, this trial enrolled patients many years ago, and we'll have some important updates on the outcome of those patients. Our second-generation trial really pressure-tested shortening manufacturing time to release the T cells within 2 weeks essentially after they've been programmed; and importantly, also, to shorten the amount of time that it takes to release the T cells. Because you need essentially those two things to occur, the manufacture and the release - before the patient can get the cells. And we have shortened both and this one-two punch, if you would - this first-generation trial followed by the second-generation trial really gives us great confidence for the opening of our third-generation trial. So part of that confidence comes because we're looking ahead to ASH on Slide 16. And I've highlighted the 5 presentations we have with our partners at Intrexon and MD Anderson. We're going to have updates on patients who enrolled in our first-generation trial. We're going to have updates on our second-generation trial. Both of these used the Sleeping Beauty system. We're going to comment on the persistence of the infused CAR-T cells. And we're going to comment also on the survival of the patients. That's in addition to giving further information about our preclinical data regarding this very rapid manufacturing -- the point-of-care manufacturing. Our first-generation trial, as I alluded to, is really providing us some of the most mature, multi-year -- not just months now but years-long -- follow-up on our patients. Our second-generation trial infuses T cells after lymphodepleting chemotherapy, and it really tests the suite of improvements that I've really alluded to over this last year around the CAR, the manufacturing and the release of the T cells. And I think what's really exciting is that these trials are generating a lot of enthusiasm as we progress to our third-generation trial in the point-of-care to enter the clinic next year. We also, as part of our update, will comment on our regulatory T cells as well as also an update on our CD33 program, which is currently enrolling at MD Anderson. So let's go now to Slide 17, which is the summary, really, of where we stand with respect to our partnership with the NCI. And this is the work we're doing under a CRADA with Steve Rosenberg. He's developing tumor-specific T cell therapies, and he chose us -- he chose the Sleeping Beauty system to genetically modify T cells with neoantigen-specific T-cell receptors. And I would just like to highlight the pace -- the rapid pace of progress. Essentially, we signed the CRADA in January of this year -- January of 2017 -- and we have progressed through the preclinical data. We've actually progressed through writing the clinical trial, where we're currently pressure-testing in a scale-up and validation process the biology. And all of that has been done within a year. And we're then going to go on and launch the clinical trial next year. This clinical trial will be under the direction of Dr. Rosenberg. And it's really amazing at this point, because we are going to be the first company to be able to genetically program T cells using this non-viral approach to really make a personalized T-cell therapy to go after the Achilles heel of cancer, to go after these neoantigens, which are the hallmark of why patients develop solid tumors. So 2 slides now on the corporate update. Slide 18, we can go over quickly to really rest on Slide 19. At the close of the quarter we have approximately $84.4 million in unrestricted cash resources plus approximately $29.4 million at MD Anderson Cancer Center from our prepayment program under the research agreement. And these funds support our programs to be conducted at MD Anderson Cancer Center. We anticipate that our cash -- current cash reserves will be sufficient to fund our operations into the fourth quarter of 2018, and that includes starting the randomized controlled trial. So those are my prepared remarks, and let me turn it over to the operator, if I may, and then we can open it up for questions. Operator, are you there?