Thomas Schall
Analyst · Raymond James
Thank you, Bill, and good afternoon, everyone listening. Thank you for joining us on our third quarter 2019 conference call. In the third quarter, I adopted a new mantra that I then called 4, 5, 6, which of those of you who are following can see on Slide 3, that is, we at ChemoCentryx had 4 clinical programs, yielding 5 data readouts over the then next 6 quarters. One quarter later, we are on track with this goal. Today, I will concentrate on the first top line data events for each of our first 2 drug candidates, the release of results from our pivotal Phase III ADVOCATE trial of Avacopan in the treatment of ANCA-associated vasculitis in mid- to late Q4, that is, this quarter and then I'll touch upon 2 studies of CCX140 for focal segmental glomerulosclerosis, or FSGS, in the LUMINA I trial, which is expected to have top line data in the first half of 2020, followed by the LUMINA II trial also next year. Rounding out the last quarter's mantra of 4, 5, 6 will be data that we project in 2020 from 2 more trials of avacopan: the AURORA trial of avacopan in hidradenitis suppurativa, or HS; and the ACCOLADE study of avacopan in C3 glomerulopathy, or C3G. So as you can see, top line data will come fast and frequent as we enter the most exciting period yet in our rich and storied history here at ChemoCentryx. As most of you are aware, on October 1, we were joined in New York by 2 of the world's leading nephrologists, Dr. David Jayne of Cambridge University in England; and Dr. John Niles of Massachusetts General Hospital in Boston. We hosted an R&D Day, went into great depth on ANCA vasculitis and FSGS and the unique mode of action of our targeting systems of the novel medicines: avacopan and CCX140, respectively. This meeting also featured a fascinating and powerful session in which Dr. Jayne interviewed an ANCA vasculitis patient. Ms. Dianne Shaw spoke movingly about the difficulties of living with this rare but ravaging disease, including how she and other patients attempt to cope with the devastating impact of the high doses of chronic steroids that are used in the current so-called standard of care. We know ANCA vasculitis to be a neutrophil-driven disease where complement fragment C5a binds to the C5a receptor, or C5aR, which then drives neutrophils to inflame and ultimately destroy the body's blood vessels. Avacopan intervenes to make the C5a receptor pharmacologically inert or inactive even at trough levels of the drug in the body. Avacopan does so with exquisite selectivity. It does not inhibit the second and beneficial receptor for C5a, another receptor called C5L2, as Dr. Jayne pointed out at our R&D Day and as you can see from Slide 4. This is important because the literature shows that C5L2 has a beneficial impact on inflammatory health. Indeed, evidence required us to design avacopan, and this was with considerable scientific effort to stifle the roles of the bad actors, C5a receptor binding the C5a, while allowing free reign for the good interactions of C5L2 with C5a. So maybe it was no surprise when our Phase II CLEAR, randomized, controlled clinical trial of avacopan demonstrated that avacopan rapidly brought neutrophils to normal levels in ANCA patients while swiftly bringing active vasculitis under control, also while showing benefits across the total burden of disease in ANCA vasculitis, that is, with evidence of improving and stabilizing kidney function and even improving patient-reported outcomes and validated quality-of-life assessments. Avacopan did all of this without the high doses of steroids that are currently used in the traditionally established standard of care for ANCA vasculitis. The Phase II CLEAR and the Phase II classic trials provided the logical building blocks in laying the foundation for the pivotal ADVOCATE Phase III double-blind, double dummied, randomized, controlled clinical trial. We expect to have top line data from the ADVOCATE trial between the middle to the end of this current quarter. So what should you look for in these results? To help us follow this, please look at Slide 5. First, to the 2 primary end points. In the ADVOCATE trial, the first primary end point occurs at week 26 and answers the question can you effectively bring patients with an active vasculitis flare into a state of BVAS remission as measured by the traditional, but limited, Birmingham Vasculitis Activity Score. BVAS remission is defined as having a BVAS score of 0 and being off steroids for the preceding 4 weeks. There is much to say about BVAS, and I'll briefly explain the limitations of BVAS in a moment. As we've discussed many times, the statistical null hypothesis is one of statistical noninferiority of avacopan therapy compared to chronic steroid-containing standard of care in achieving this BVAS remission. Why is noninferiority the null hypothesis that is employed? Mostly, the answer is a pragmatic and arithmetic one. It is simply not feasible to power a study for statistical superiority in an orphan disease such as ANCA. The sample size, or N, would be too large for an orphan disease trial. Regulatory agencies understand this. So noninferiority with respect to the BVAS end point is the only pragmatic option available to us. In addition, BVAS only measures the ability to get through the active vasculitis crisis. The steroid containing standard of care can get people through the initial crisis, but it does so at a great cost. And these other costs are not captured in the BVAS primary end point by its traditional design. So patients with ANCA vasculitis can still get into a so-called BVAS remission and still be quite unwell from the ongoing ANCA disease and from, and maybe especially from, the illnesses that are caused by the steroid therapy itself, these steroid induced problems being largely not scored in the BVAS assessment. The second primary end point is a similar comparison of statistical noninferiority of BVAS remission at 52 weeks and is intended to answer the question can you keep a patient in BVAS remission following the acute crisis. I will note for all of us that avacopan has the same primary end point null hypothesis, that is, statistical noninferiority for BVAS remission, as was used in the preceding RAVE study, which, in fact, was the sole basis for the approval of rituximab being offered as an alternative to cyclophosphamide, both, of course, in combination still with noxious steroids. RAVE, in fact, was the only other Phase III pivotal trial that has led to an approval for a therapeutic entity in ANCA vasculitis. We plan to report both the 26- and 52-week primary BVAS end points in our top line data readout this quarter. Make no mistake, we believe that achievement of the noninferiority null hypothesis for BVAS remission constitutes a victory. But I'll admit, I don't like the term noninferiority because it sounds lackluster, a word that is completely at odds with our aim, which is nothing less than to revolutionize the standard of care with a 21st century medicine that meets the desperate needs of ANCA patients. The second element that we plan to touch upon, therefore, in the top line data release features the total burden of disease, as we aim to establish avacopan as a superior profile of therapy in ANCA vasculitis. As I mentioned, the BVAS score itself is limited because it only measures active and acute vasculitis signs and symptoms. It is not a true reflection of whether a patient is well, and that is why our ADVOCATE trial aims to fill this gap by measuring a number of important secondary end points, as shown on Slide 5. We hope that these will show that avacopan contributes to a meaningful benefit in other dimensions that are vital to patients and, indeed, to the health care system, including diminishing or arresting ongoing organ damage, particularly in the kidney, damage that accumulates with the use of steroids; also eliminating therapy-induced illness and improving the patient's quality of life and the ability to function normally. As you can see from Slide 6, the current standard of care is simply not safe, it's not fast and it's not durable. And it's not even inexpensive as some individuals who are not particularly well versed in this area have suggested because the relatively low-cost of purchasing steroids is illusory. As to chronic high-steroid therapy, there's a more prevailing and informed view. That is the buying cost of steroids is dwarfed by the using cost of steroids, that is, the economic burden of steroid therapy. Consider here the vast economic burdens of the system of treating the profound side effects, illnesses and dealing with the deaths caused by the use of steroids. And I would submit that these economic burdens of steroid use, vast as they are, pale in the raw light of the human cost to patients, their families and their daily lives. So now turning to Slide 7, we know from our many discussions with patient advocacy groups, with clinicians and with regulators that there's great interest beyond BVAS in alleviating the total burden of disease in ANCA vasculitis. Our previous results from our controlled Phase II trials make us hopeful that we can do exactly that. We are hopeful that the top-line data from ADVOCATE will demonstrate, as they did in the Phase II trials, with objective measures that avacopan improves organ function and quality of life with a favorable safety profile. Before turning to our second drug candidate, let me say a quick word about avacopan's potential to become a pipeline and a drug, shown on Slide 8. Before the end of next year, 2020, we expect to release top-line data of avacopan Phase II trials in 2 additional indications. First, in our ACCOLADE trial of avacopan for the rare kidney disease C3 glomerulopathy, or C3G, a life-threatening disease that typically strikes the young. There's no approved therapy for C3G. I'm very pleased to tell you that we recently received a $1 million grant from the FDA to support the advancements of our ACCOLADE trial. We will present a post-run avacopan in C3G at the upcoming annual meeting of the American Society of Nephrology, or ASN, meeting this week. Second, our AURORA trial of avacopan in hidradenitis suppurativa, a disfiguring skin disease that's thought to implicate the C5a receptor. Again, the unmet need here is very high, and the commensurate commercial opportunity is significant. Beyond that, there could be many other indications for this versatile, small molecule with its unique mode of action, but for now we're clearly focused on delivering our prime objective of top-line data results. Let me turn now to CCX140, our orally administered inhibitor of the chemokine receptor known as CCR2. Please see Slide 9 where we describe two clinical trials: LUMINA-1 and LUMINA-2, which are underway for CCX140 in the treatment of another rare kidney disorder, focal segmental glomerulosclerosis, or FSGS. As Dr. John Niles from Mass General discussed during our R&D Day last month, there is no approved treatment for FSGS. However, steroids with their attended toxicities are frequently used. Our objective in the LUMINA trial studies is defined in terms of reduction of protein in the urine, or proteinuria, as the FDA has indicated that proteinuria lowering in FSGS could potentially be a registration end point. And some of you may recall that proteinuria lowering was the metric we studied successfully in an earlier Phase II trial of CCX140. In that trial of several hundred patients with diabetic chronic kidney disease, CCX140 met its end point of rapid and sustained reduction in proteinuria while demonstrating a good safety profile. That successful study provided the basis of our work now in the orphan disease of FSGS because of its significant unmet need and owing to the facts that in FSGS cost, size and timeline for these kind of studies are wholly tractable for a company of the scope and stage of ChemoCentryx. As you will see in Slide 10, we've completed enrollment in our LUMINA-1 randomized, placebo-controlled trial of FSGS patients with high levels of protein in the urine. The primary end point is reduction in proteinuria at 12 weeks. We expect to report our top line results during the first half of 2020. Our LUMINA-2 trial is a single-arm, open-label study of patients with nephrotic levels of proteinuria and primary FSGS, which is a rarer condition. We expect top line results of this trial during 2020. Again, at this month's ASN meeting, there will be a scientific poster represented on the LUMINA-1 trial and 2 posters on the novel role that CCR2 inhibition place in renal diseases such as FSGS. In summary, we stand on the threshold of a remarkable period. This gives us the potential for multibillion-dollar commercial opportunities in the U.S. alone, as you can see from Slide 11. When the ADVOCATE top-line data are released, we and the experts will be looking at whether ADVOCATE achieves statistical noninferiority in BVAS-based remission compared to the standard of care at week 26 and whether avacopan sustains BVAS-based remission at 52 weeks and also whether there are indicators that avacopan reduces the total burden of disease in ANCA vasculitis. Following ADVOCATE, we look forward to reporting out top-line data of avacopan in C3G and HS during the course of the coming year. Excitingly, this may just be the beginning of the avacopan franchise. And then we'll look forward to releasing top-line data from both our LUMINA-1 and LUMINA-2 trials during 2020 as part of our other major program with CCX140 and FSGS where the lack of approved or effective treatment shows an urgent unmet need. And so we move forward from last quarter's mantra of 4, 5, 6 to now what I call program 2020-4 sights, that is, after this quarter's top line readout from ADVOCATE where I personally believe that we are well positioned for a positive readout propelling us to an NDA and other regulatory filings, we look beyond as well, 4 major data readouts in 2020 or 2020-4 sights. As we like to say in ChemoCentryx, the future has never been closer or more exciting and what a compelling time it is for clinicians, patients and shareholders alike. Now let me turn the call over to Susan Kanaya, who will describe our strong financial position. Susan?