Raymond Dennis Pratt
Analyst · Stifel
Thank you, Tom. I want to point out that the results I will discuss are top line data. Much of it is what I covered on the July 11 call. We expect to present the results of the CRUISE-1 and CRUISE-2 studies at the upcoming American Society of Nephrology Meeting in November of this year. We continue to be thrilled with the outstanding clinical results from our Phase III CRUISE-1 efficacy study. The study was well designed and well run, and again, we extend our thanks to all the investigative sites and patients, whose participation made these results possible. The CRUISE-1 study was designed to show that SFP, administered via dialysate, can maintain hemoglobin levels by effectively providing iron to the bone marrow, replacing the iron loss patients experienced during each dialysis treatment. Prior to the CRUISE studies, there has never been a controlled 12-month study done in the CKD-HD population to demonstrate iron delivery and hemoglobin maintenance. Because SFP is a maintenance therapy, the trial was designed to control the factors which influence hemoglobin levels in dialysis patients, primarily, erythropoiesis-stimulating agents or ESAs and IV iron. The study did not permit any adjustment to ESA dose once the patients entered an initial run-in period, nor was any IV or oral iron permitted. As a result, this study, designed with FDA input, incorporated 3 stages: a run-in stage, a randomization stage and an open-label stage. Patients who were able to advance from one stage to the next, based upon changes in their hemoglobin levels. 300 patients received study drug at enrollment, and the study population was well balanced at baseline, with 149 patients receiving SFP and 151 placebo. A total of 206 patients, or about 70% were advanced to the open-label study after completion of the -- after the randomized treatment phase. The remaining patients left the study for standard reasons seen in this patient population, including adverse events, changes in dialysis center, transplants, deaths or withdrawal of consent. There were no differences between SFP or placebo in the patients who left the study. The CRUISE-1 study met its predefined primary statistical endpoint and all key secondary endpoint. The primary endpoint was the difference in the change from baseline in hemoglobin values between the SFP and placebo groups during the last 1/6 of the patient's time in the study. At the end of treatment in the SFP group, the mean change from baseline in hemoglobin was a positive 0.6 grams per liter. In the placebo group, the change from baseline was a significant minus 3.0 gram per liter drop in hemoglobin. Thus, the mean difference between SFP and placebo at the end of treatment was 3.6 grams per liter in favor of SFP, with a p-value of 0.011. The p-value calculation on the primary endpoint included every patient who advanced through the study and who received at least one dose of the study drug and who had at least one post baseline hemoglobin value. Let me briefly summarize the other important findings of the trial. The first one is very important, and that is that SFP maintain hemoglobin in the absence of IV iron administration. SFP has clearly shown that it can provide iron to the bone marrow and maintain hemoglobin without any other iron supplementation. SFP maintained reticulocyte hemoglobin. This is also an important result, because reticulocyte hemoglobin concentration is the most important index of iron delivery to erythrocyte precursors and is the earliest indicator of the development of iron deficiency. SFP maintained iron storage relative to placebo, as reflected by the difference in ferritin values between the SFP and placebo groups by the end of treatment. SFP did not increase ferretin above baseline. SFP also did not induce iron overload. This is a very important result, as it indicates that patients receiving SFP-iron use the dialysate delivered iron for red blood cell production rather than storing it. No patients discontinued SFP because of evidence of iron overload. Overall, SFP demonstrated an excellent safety profile. Adverse events and serious adverse events in the SFP group were similar to patients receiving placebo. There was no increase in intradialytic hypotension, infections, anaphylaxis or hypersensitivity reactions compared to the placebo-treated patients in over 10,000 individual administrations of SFP. Compared to other iron studies in this population, this is a tremendous number of individual doses. The benefit risk profile for SFP to maintain hemoglobin levels was very favorable. The population receiving SFP had a statistically significant difference from placebo and hemoglobin levels, with absence of adverse events commonly attributable to iron administration. The strong CRUISE-1 study results support and strengthen the results of the PRIME study reported at the ERA, EDTA meeting earlier this year. Together, the 2 studies demonstrate that SFP can effectively deliver iron to patients, maintain hemoglobin without increasing iron stores and significantly reduce ESA use by 35%. As a longtime clinical mythologist and drug developer, I believe these results will enable clinicians to better manage dialysis patients, ESA and iron requirements. New information about the adverse consequences of IV iron and iron overload in dialysis patients are emerging. And SFP-iron, administered via dialysate, provides a thoughtful, physiologically relevant means of delivering iron, maintaining hemoglobin levels and reducing the hemoglobin swing as commonly observed in this patient population. I'll turn the call back over to Rob at this time for further comments.