Anne-Marie Duliege
Analyst
Thank you, Raul. As always I want to thank my colleagues for their ongoing hard work and dedication in support of our NDA submission. It has been very gratifying that we have been able to responsive the FDA’s questions. We will continue to work closely with the agency and remain hopeful that providing FDA approval we'll be able to bring this few drugs to a patient population with unmet treatment needs. As we've noted before, the NDA included data from our fifth preclinical program, two pivotal studies 047 and 048 as well as a continuing long term open label extension study 049. Overall, patients who responded fostamatinib had a timely robust and sustained response to treatments. The fifty preclinical programs confirm that fostamatinib has a consistent and predictable safety profile alignment with a large safety database. As shown on Slide 12, Rigel focused on fostamatinib through chronic ITP because there was a significant unmet medical need. There are approximately 65,000 patients with chronic ITP in the U.S. and it qualified as an orphan disease. ITP is a rare autoimmune condition. ITP arises from various disease mechanisms of platelet destruction and in some cases insufficient platelet production. The pathophysiology of ITP is complex and many factors that contribute to the disease may differ from patient to patient making this a clinically heterogeneous disease. This disease is characterized by an increase risk of bleeding often with -- bleeding. However at times at results such as GI or brain hemorrhage can be more senior and possibly cells. Treatment options exist but they’re limited after with side effects and the response can vein over time. There is no treatment that specifically prevents platelet destruction. Sick time is the key figure in the immune system destruction of ITP. That’s why fostamatinib and stick inhibitor with the unique mechanisms of actions it's a particular interest. Moving to Slide 13 you can see that there were two similar Phase 3 trials followed by an open-label extension. -- was allowed at week four and patients with no response had the option to switch to the long term extension study as of week twelve. Slide 14 provides the main base sign characteristics of patients in the Phase 3 program. This is a patient station population typical of ITP, middle aged female patients, but these are patients with the senior form of ITP. As shown by the median duration of ITP prior to study entry of 8.5 years but some patients had decades of ITP disease prior to entry. Multiple prior ITP treatment and finally very low platelet count at baseline with a median of 16,000. I now want to review with you how we are evaluating efficacy in this disease as shown on Slide 15. First, the stable response rate is defined in the protocol which has at least four out of six biweekly platelet counts greater than 50,000 per micro liter in absence of rescue medication during weeks 14 to 24. This was agreed upon with the FDA and corresponds to the high bar in terms of platelet count. In further analysis we looked at the ASH guidelines which highlight the importance of maintaining platelet counts greater than 30,000. Hence in collaboration with our advisors KUP leaders we investigated a more overall clinically relevant response. We looked at patients with a platelet count during the first 12 weeks of treatment of greater than 50,000 per microliter in the absence of rescue medication and the duration of response is defined by not dropping below 30,000 at two consecutive visits. We call this a clinically relevant platelet response. The response was consistent between the two randomized controlled studies and the open label extension study. On Slide 16 on the left panel is the primary efficacy end point from study 047 and 048. The treatment effect is a stable response of 18%. On the right panel we now see that the response rate of patients who cross from placebo to fostamatinib in study 049 is 23% similar to that observed in studies 047 and 048. Slide 17 reminds us that responses on fostamatinib are durable. 82% of the stable responders maintained response for at least one year and response duration of more than two years have now been observed. The key point is that the platelets' response is long lasting, in fact the medium duration of response has now been reached and is as of now exceeds this 28 months. Looking at the serious adverse events of bleeding on Slide 18 in the two people trials we've seen how the response, that this response is clinically relevant. Indeed there were no such serious adverse events of bleeding among the stable responders during the control portion of the study as compared to the non-responders and the placebo patients. Now we move on to Slide 19, the most recent post doc analysis that we have completed for the ICP-12, as mentioned earlier this analysis looks at the overall clinical benefit and the potential clinical utility of fostamatinib in ICP which may have direct bearing on the commercial potential. I will remind you that choosing our defined clinically relevant platelet response as stated on Slide 15 and again here on Slide 19 we found that 43% of the fostamatinib treated subject and 14% of the placebo treated subjects met this criteria. The median duration of response for fostamatinib patients was greater than 28 months using the April 2017 data cut off submitted to the FDA for the 120 day safety object. Slide 20 shows a median platelet count over time for patients who had a fostamatinib clinically relevant response in green versus the fostamatinib non-responders in blue and the placebo patients in orange. The immediately response for the 43 subjects -- with a vigorous response showing was robust and enduring compared to the non-respondents and the placebo patients. On slide 21 you can see that 60% of the quickly responders do so within two weeks and 80% within eight weeks. This is important because doctors treated with fostamatinib patients will know quite rapidly whether the patients find benefit from fostamatinib or not, and certainly why we discuss. As a reminder, on the next line, I just would like to do a quick review of the adverse events for the pivotal trial. You see that most of the adverse events were mild or moderate. And they were mostly conceived adverse events in the placebo group compared to the fostamatinib treatment. This is because the bleeding events were less frequent in the fostamatinib ARM. The most frequent adverse events observed were diarrhea, hypertension and [synthetic] enzyme elevation. So in conclusion of our summary of the fostamatinib program in ITP, the type of the clinical data across ITP and a larger message of slightly database support a favorable beneficiary profile for patients exposed to fostamatinib. In responder ITP patients treatment with fostamatinib result in higher outcome, fewer bleeding events and manageable safety implications. For non responding patients any safety events are evenly manageable in routine people practice and the risk is immediate to a duration of up to 12 weeks. If approved by the FDA fostamatinib may be an important introduction by blocking disruption and generating the clinically relevant response in patients with chronic or persistent ITP. Slide 24 shows a quick overview of the U.S. regulatory interactions to-date. The open designation was granted in August 2015. We submitted an NDA earlier this year and this NDA was accepted for review by the FDA. We are also provided a 120 day safety update. The Mid-Cycle Communication, during this Mid-Cycle Communication we have reconfirmed that no advisory committee meeting was planned and overall there was no showstopper in our interaction and our responses to questions from the FDA. And finally we expect the PDUFA date by -- of April 2018 which remains unchanged. In addition we had one special triazole and two clinical starts which went well. In regards to filing with the European authorities on slide 25, we believe that we have data that also merits the submission of the marketing authorization application or MAA to the EMEA. We have requested National Scientist Advice Meeting in Spain, the UK and the Netherlands and a meeting date has been set up with the UK. This concludes my ITP review, and I will now move on to discuss our autoimmune hemolytic anemia program. Autoimmune hemolytic anemia or AIHA is due to the presence of warm antibodies that react with protein antigen on the surface of red blood cells above temperature. The disruption of red blood cells leads to reduce oxygen generally to the issue resulting in fatigue and dyspnea when exercising. In some patients the symptoms can be more severe with dyspnea addressed and varying degrees of fatigue. In rare cases of the most severe anemia the critical syndrome may become less threatening. It is an ultra rare disease with approximately 40,000 adult patients in the US. Similarities of treatment used with ITP exists with steroid, rituximab, other monoclonal agents and splenectomy beign available but in fact there are new medical treatment that are specifically approved for autoimmune hemolytic anemia. So there are similar reasons to study in autoimmune hemolytic anemia. One, the unique mechanism of action which addresses occur of autoimmune hemolytic anemia. The clear treatment effect in ITP is an indicator of the value of second addition to treat autoimmune disease such as hemolytic anemia. This is still an objective in cone to change the hemoglobin. And finally we benefit again from this large safety database of more than 5,000 patients years primarily in RA and ITP. Slide 21 -- 27 summarizes the design and the results so far. The design of the study is -- obviously two study is an open-label two-stage study. The primary endpoint is the response rate in the first 12 weeks without the need for rescue therapy. And the response defined as a hemoglobin of at least 10 gram per deciliter and at least 2 gram per deciliter increase from baseline. On the top-line 12 week basis the Phase 2 achieved a pre-specified primary efficacy endpoint for stage 1. The patient population on slide 28 is also characteristics of the general patient population with autoimmune hemolytic anemia, mostly middle age women and of course they had a low hemoglobin as sign of the anemia. On slide 29 we will review the hemoglobin response in stage 1 of this trial. 17 patients had at least one baseline hemoglobin measurement. We observed a response rate of 35% six out of 17 on fostamatinib. Four patients responded during the 12 week evaluation period and on the preliminary basis an additional two patients met the response criteria in the extension study after 12 weeks of dosing. Two of the 17 patients withdrew early from the study due to non-safety related reasons and will be replaced for study protocol. For the verification and the comprehensive analysis of the patients data will continue and will be presented in the near future. In terms of safety profile on slide three, there was no new adverse events in the program. Three patients with serious adverse events all assessed had no treatment related by the investigator. One patient recovered and continued on treatment, two patients had serious adverse events resulting in fatalities in both cases these patients were [indiscernible] due to [indiscernible] and in one of them also due to CLM. One patient had skin necrosis with infection and another patient an elderly gentleman had pneumonia. So in summary on Slide 31 six out of 17 patients approximately 25% of patients had a response to subjects which respond during the extension period of the study. There was no new safety signal and no drug related serious adverse events. Two patients dropped out and will be replaced through protocol and we've achieved the primary endpoint successfully. In terms of next step we're now planning to enroll in stage 2 of the trial of an additional 20 patients total. The orphan drug designation application is in progress and we're working on our regulatory strategy to define an optimal path to approval. Now would like to pass you to Eldon for a look at commercial activity, Eldon.