Peony Yu
Analyst · William Blair. Andy, your line is open
Thank you, Tom. For the roxadustat program in the U.S. and ER, we are pleased to share with you the adjudicated cardiovascular pool safety analyses topline results from the Phase 3 global roxadustat program. We see these results supporting safety of roxadustat in CKD patients. We also see other benefits beyond hemoglobin increase. On MACE and MACE+, to reiterate what Tom outlined earlier and what we are disclosing on the adjudicated safety data, MACE and MACE+ composite endpoints. MACE measures the number of patients with one or more adjudicated positive MACE events, which include death, myocardial infarction and stroke. The MACE+ composite endpoint has two more components, in addition to the MACE, which now in also adding heart failure and unstable angina requiring hospitalization. The MACE composite endpoint is what we and our U.S. partner AstraZeneca discuss what the FDA for safety assessment. MACE+ is what we and our European partner Astellas agree with EMA. MACE+ have also been used extensively in safety endpoint and assessments in CKD anemia trials as well as in some diabetes trial in both Europe and in the U.S. Now what is adjudication and why is – it’s a part of our process. Adjudication is the process of independently and objectively applying clinical standards to consistently determine individual events, qualify as MACE or MACE+ events, to maintain objectivity. Independent experts in cardiology, neurology – and neurology, who are blinded to treatment assignment reveal the patient data and adjudicate the events relevant to their specialty. To maintain data integrity, the process and documents are managed by an independent third party. We conduct the MACE and MACE+ analyses in the following patient pools dialysis or all dialysis. Incident dialysis, which is a sub population of dialysis patients, who are just starting out to receive chronic dialysis treatment, and as well as in non-dialysis patient population. In our dialysis pool of around 4,000 dialysis patients based on the collective results of the various MACE and MACE+ safety analyses, we believe there’s no clinically meaningful difference in MACE and MACE+ risk between roxadustat and epoetin alfa in the all dialysis patient population and the 95% confidence interval of the hazard ratio is above – I’m sorry, off that 95% confidence interval of the hazard ratio is below 1.3, which is what the conventionally accepted measure in such time to analyses of MACE and MACE+. In the incident dialysis pool consisting of over 1500 patients, a subpopulation of the dialysis, our all dialysis pool, which we believe offers a better setting for comparing roxadustat to epoetin alfa, then the stable dialysis population. Roxadustat demonstrate the superiority to epoetin alfa in the time to first MACE+ in this subpopulation with fewer patients with MACE+ events was noted. In the time to first MACE analysis, there is a trend toward reduced risk for patients on roxadustat, compared to epoetin alfa. In our CKD non-dialysis pool of approximately 4,300 patients in the multiple MACE and MACE+ pool, ITT analyses conducted in non-dialysis-dependent CKD patients. Collectively, we believe there is no clinically meaningful difference in MACE and MACE+ risk between roxadustat and placebo in non-dialysis patients. Now let’s put these safety findings along with the reported efficacy results in clinical context. In our last earnings call, we reported that roxadustat demonstrated efficacy in meeting the primary efficacy endpoint of change in hemoglobin from baseline to mean hemoglobin average between weeks 28 to 52 in each of the seven Phase 3 studies conducted by FibroGen and our partners. For the all dialysis patient pool, as reported previously, not only was non-inferiority achieve in primary efficacy end points in all dialysis patients. Superiority in efficacy, as demonstrated by a statistically significant larger increase from baseline hemoglobin level in roxadustat treated patients than EPO patients was achieved in both HIMALAYAS study, which is in on incident dialysis and in SIERRAS conversion dialysis studies. In SIERRAS, roxadustat treated patients achieve a more physiologic hemoglobin level of 10.7 grams per deciliter versus 10.2 in EPO arm, with a 33% reduction in red blood cell transfusion risks. We believe the lower achieve hemoglobin level in EPO comparator arm, results from a combination off the lower target hemoglobin level on ESA label, due to FDA’s concern regarding ESA cardiovascular safety and EPO hyporesponsiveness in patients with inflammation as inflamed patients with elevated c-reactive protein require higher doses of EPO, then patients with normal baseline CRP levels, although, they achieve lower mean hemoglobin level. And as we understand some multiple publications that there’s higher risk with higher target hemoglobin, when one is using ESA, while it higher achieved hemoglobin in EPO has been conferred to better safety, when lower doses of EPO is use. Given the mechanism of our drug being uniquely different than EPO being more physio has been able to achieve a more physiologic hemoglobin level should translate into benefit for patients. Roxadustat efficacy measured in achieve hemoglobin level and dose requirement are not affected by inflammation status, unlike in EPO. This important differentiation from ESA has been observed in multiple Phase 3 studies, including in the U.S. based CRS study, which we believe is reflective of U.S. dialysis practice undercurrent ESA labeling restriction. And we also seem this differentiation in our China Phase 3 study in dialysis patients. We have also observe a reduction of risk of a red blood cell transfusion in our Phase 3 program. Although, the roxadustat arm in conversion study start out at a disadvantage being exposed to patients for the first time and being compared to patients on optimize EPO dosing, the roxadustat treated patients, they’ll show significant reduction in red blood cell transfusion risk, as measured by time to first transfusion compared to patients receiving stable maintenance doses of epoetin alfa. Conversion patients comprise a majority in the dialysis, our all dialysis patient pool. Yes. Based on the key MACE and MACE+ analyses, we assessed no clinically meaningful difference in the risk of MACE, MACE+ with between roxadustat and epoetin alfa. Next, the incident dialysis population is defined as patients, who enter dialysis studies within four months of starting dialysis treatment. A vast majority of the incident dialysis patients, where either ESA-naïve or had very limited prior exposure to EPO. During the transition from non-dialysis to dialysis in the first four months of dialysis treatment, patients suffer from mortality and hospitalization rate applies those off dialysis patients survived the first year of dialysis treatment. What’s also relevant to roxadustat is that, initiation of dialysis often also coincides with the initiation of anemia therapy. We and our partners are very happy with the result or superiority to epoetin alfa in the time to first MACE+ and a favor of both trend towards reduce risk for patients. On roxadustat compared to epoetin alfa in time to first MACE analysis in the incident dialysis patient populations. We believe roxadustat favorable results in incident dialysis compared to EPO could enable a safer treatment of anemia in CKD patients initiating and continuing dialysis treatment. Turning to CKD patients, not on dialysis. In the CKD pool analyses from the three non-dialysis studies, roxadustat both consistently raise hemoglobin levels to mean hemoglobin of 11 gram per deciliter in the roxadustat treated patients and significantly reduced red blood cell transfusion compared to placebo. This is very important for patients to preserve their ability to have kidney transplant later down the road, if they need to. Importantly, roxadustat has shown the potential to preserve renal function as there was a statistically significantly smaller declines in eGFR in roxa-treated patients than placebo. With a treatment difference of 1.62 in eGFR unit, when measuring change at one year from baseline in patients with baseline eGFR of 15 or higher. P value is 0.0001 or a reduction of declined by 38% in eGFR, relative to placebo arm. We also observe statistically significant improvements in the various quality of life end points at 12 weeks from baseline, including the SF-36 Vitality subscale with p-value that has 0.0002, SF-36 Physical Functioning subscale p-value 0.0369, FACT-AN Anemia subscale with p-value [Audio Dip] FACT-AN Total score p-value 0.0056, EQ-5D-SL VAS score with p-value that has 0.0005 in CKD patients not on dialysis. Putting together these and other important potential clinical benefit with the safety results that we have seen, in comparison with EPO, which is a gold standard for safety measurement and in comparison to EPO, which is the current standard of care in dialysis, but have some limitations. Along with the convenience of a pill, when treating patients with roxadustat to make treatment much, much more accessible than parenteral route of ESA. We are excited about the potential of roxadustat as an innovative new therapy for CKD patients. We hope this provides some helpful context for you in understanding the significance of the safety top line results of announce today. Tom has already touch on the status of our U.S./EU submission plans, we and AstraZeneca will be in discussion with FDA and NDA submission plan, which we’re targeting for September, October timeframe. We are also supporting Astellas, MAA submission to EMA to be submitted thereafter. For China, in April, CFDI inspected our China Phase 3 CKD non-dialysis study sites, we expect that the roxadustat label on CKD anemia, there will be expanded mid-year to include non-dialysis as well as dialysis patients. As Tom mentioned, we are excited about roxadustat’s opportunity for market access via this year’s NRDL election process in China. In Japan, the NDA on roxadustat for treatment of anemia in dialysis dependent CKD patients submitted by our partner Astellas in September 2018 is now under review. We anticipate that Japan NDA decision later this year. For the treatment of anemia in MDS patients, we have an ongoing Phase 3 study in transfusion dependent lower risk MDS patients in the U.S., Europe and Asia plus another study, which is Phase 2/3 in non-transfusion dependent MDS patients in China. Each has an open label run in period, anemia in MDS is notoriously difficult to treat and we are striving to make a difference for MDS patients with roxadustat. We have completed enrollment of the first 24 patients in the open label portion of the U.S./European study, we and our partners are encouraged by the available results, as there where large proportion of transfusion dependent patients able to achieve transfusion independence endpoint. And we have already started dosing in the double-blind portion of the U.S., European Phase 3 MDS study. Finally, we are on track to start our first clinical trial in chemotherapy-induced anemia with roxadustat, as the Phase 2 study in the U.S. to be a started shortly in 2019. I believe that all of us are aware and would like to do something about the under treatments of anemia in patients who have undergone chemotherapy. I’d like to now turn the call back over to Tom.