Richard Geary
Analyst · William Harris Investors, please go ahead
Thank you, Lynne. This year we have made substantial progress across our large and diverse pipeline of over three dozen drugs in development. Just last week, we reported positive results from our phase 2 study evaluating IONIS-FXIRx in patients with end-stage renal disease on dialysis. IONIS-FXIRx is a two oral antisense drug targeting Factor XI. Factor XI is a unique target for anti-thrombotic drug because human generic preclinical and clinical studies have shown a decrease Factor XI activity results in decrease clot formation without increasing bleeding risk. Just to remind everyone of our results today we've shown in the study that was published in the New England Journal of Medicine that patients undergoing total knee replacement treated with FXIRx have a seven fold lower incidence of venous thromboembolisms (VTEs) compared to those treated with enoxaparin. The most impressive finding however was that this significantly reduced incidence of VTE was accompanied with no increase in bleeding. This is the first time an anti-thrombotic drug demonstrated an anti-thrombotic effect could be associated from bleeding risk. This means that IONIS-FXIRx has the potential to be useful in many different therapeutic settings especially for patients who are at high risk for blood clots and also at high risk for bleeding. The study we reported on last week was looking at 200 mg and 300 mg weekly doses of IONIS-FXIRx inpatients with severe kidney disease that were receiving dialysis. These patients are very fragile and at a high risk of bleeding. The main goal of this study were first to show that IONIS-FXIRx could be dose safely and patients with severe kidney disease. Second to understand if the drug could effectively reduce Factor XI activity inpatients on dialysis. And third, to identify the best dose to move forward into longer larger studies in this patient population. We are pleased with the study map of all three of these goals. In this study, Factor XI activity was reduced up to a mean of 71% in patients treated with IONIS-FXIRx. A result that was highly statistically significant in both treatment groups. In addition, we observed the decrease in severe blood clots in the dialysis circuit after six weeks compared to baseline in both treatment groups, but not seen in the placebo group. And IONIS-FXIRx demonstrated a favorable safety and tolerability profile in this study. Patients treated with 200 mg or 300 mg per week had no clinically meaningful reductions in platelet levels and no treatment related major or clinically relevant non-major bleeding. We did observe an increase in minor bleeds in patients treated with 300 mg dose that was not considered clinically meaningful. In addition, there were no treatment related serious efforts events or clinically meaningful changes in lab values including those related to liver function. Both 200 mg and 300 mg doses of IONIS-FXIRx were well tolerated in this study with no [Indiscernible] or injection side reactions. So these results provide further support for the potential therapeutic benefit for IONIS-FXIRx could have for patient to need an anti-thrombotic, but with increased risk of bleeding. We are enthusiastic about the potential of FXIRx to address this unmet medical need. Earlier this quarter, we also completed our randomized placebo controlled Phase I study evaluating IONIS TTRRx and helping over weight volunteers. IONIS TTRRx is generation 2 plus antisense drug designed to reduce the production at TTRRx which is an enzyme that catalyzes the final step in triglyceride symptoms in a liver. In the Phase I study, IONIS TTRRx was safe and well tolerated after six weeks of dosing at doses up to 300 mg per week. Again we did not observe any clinically meaningful platelet declines in this study and based on the safety and tolerability profile of IONIS TTRRx and its differentiated approach for potentially treating patients with mesh by reducing triglycerides in the liver. We are currently planning of Phase 2 study and we'll share the plan update with you as we get closure starting a next study. We recently completed randomized placebo controlled Phase 2 study evaluating IONIS-FTFR4RX in obese patients. We designed this study to measure increase metabolic activity and weight loss in obese patients. Unfortunately we did not see the robust activity that we had hope to see and therefore we have decided to discontinue development of INOS FTFR4RX. However, I would like to point out that the drug did show a good safety and tolerability profile. We did not observe any clinically meaningful platelet declines in this study with doses at 300 mg per week. These safety data and those from INOS TTRRx provide two additional pieces of evidence that are clinically meaningful platelet declines are not a platform issue for a second generation drugs. We also recently completed the review of our overall development portfolio as we do every year. We have decided not to advance IONS-GCCRx [Indiscernible] drug based on the client data package. We have a high bar when we make a decision to move a drug forward and in the case of IONS-GCCRx we decided to make more sense to focus our resources on other more important programs. We remained very enthusiastic about our other IBDs program IONIS-GCGRx targeting glucagon receptor which has a compelling profile for severe diabetes. We've reported positive interim data in July from the ongoing dose range finding study which is now coming to completion. Results from both the previous phase II study and interim data from the current phase II ranging study showed that the three patients experienced robust reductions in HbA1c. Importantly again, there have been no clinically meaningful platelet declines reported in either of our GCCR or GCGR programs. Now let me take a few minutes to update you on our latest findings on platelets. Six months ago we reported that we have encountered with serious thrombocytopenia and phase 3 studies. IONIS-TTRRx and the line of source. Stan discussed at that time and again in quite a bit of detail in our R&D take this summer, the steps we are taking to assure continued patient safety in those trials. Stan also provided information about our investigations into the potential causes of these events including factors that might have contributed to the platelet declines. Since that time we've made solid progress in our investigations and so I would like to give you a brief summary of where we are today. First and most importantly there have been no new serious thrombocytopenia events in any of the programs since that initial report last May. All of our programs continue on track including the phase III studies with IONIS-TTRRx and the line of source in FCS. I have also told you today that result from five other programs which studies up to six months from which we’re also advancing clinically meaningful platelet declines. You will recall that and presented information derived from our integrated safety database that showed we had not seen serious thrombocytopenia events occur with 15 years of experience in our two primal platform. And supports our conclusion that serious thrombocytopenia is not class effect of our platform. When we talk about a class effect, we mean an effect that is seen in most role members of a chemical class. Just a reminder, different chemical classes have different properties and even minor chemical changes can have substantial effects on safety and efficacy. Of course potential class related effects can only be identified as you obtain significant preclinical and clinical experience with a particular class. So, the experience we have with our two primal antisense drugs should only be applied to that chemical class. And of course experience with other chemical classes should not be applied to our two primal or more drugs. Our confidence in our platform comes with the extensive experience we have in our oligo chemistry. With our two primal class, we are substantially greater and longer term experience than with any other chemical class. Since we reported our preliminary analysis of the safety database, we published the first review of our safety database showing new evidence of clinically meaningful platelet declines in normal volunteers. Just recently we have completed an investigation of our integrated safety database, they includes data from 16 two primal drugs that have completed Phase 1, 2, or 3 studies. And this database includes the full safety data from all these completed placebo control trials and their open label extension studies. This database is an unique resource for us. It allows us to look across clinical trials to help us better understand the safety and tolerability of our innovations platform. This database represents safety data from over 2600 subjects does with two primal antisense oligonucleotides of which about 1000 subjects have been dosed from 3 months to more than 4 ½ years, representing a total exposure of more than 800 patient years. We have now submitted for publication and peer review journal, a paper summarizing our findings from this review. It shows that there are no serious thrombocytopenic events and no clinically meaningful platelet declines in the database nor is there evidence of increased risk of bleeding. These observations both from our integrated safety database and from our recently completed clinical studies support our view that what happened in the two ongoing Phase 3 studies is unique. Now, let me tell you what we have learned about the unique characteristics of the IONIS TTRRx and volanesorsen trials and diseases. Both of these studies are ongoing and bonded. And both are still on track to have data readout in the first half of 2017. Let's first deal with volanesorsen. As we presented at R&D Day, natural history shows patients with FCS experience substantial fluctuations in platelet counts, sometimes reaching as low as 40,000 platelets per ml. we believe these abnormal fluctuations in platelets may be related to the patients extremely high triglyceride levels. Because extremely high triglyceride levels can result in increases in platelet count and platelet production, variations in triglycerides may lead to a greater overdrive for the body to make platelets. Of course, when we treat with volanesorsen, we know we can substantially lower triglycerides and that could in turn result in a reduction in platelet levels. Effectively have observed curious thrombocytopenia events only in FCS patients and not in any other patients treated with volanesorsen in either Phase 2 or Phase 3 studies provide further evidence that the disease background contributes to these events. We are also exploring the fact that in the FCS study, patients receive two high both doses of heparin facilitating assay looking and lipoprotein and lipase activity. So, this happens and this could also contributed to the thrombocytopenia. We observed, since one of the serious reductions occurred coincident with the heparin dosing. This does not exonerate volanesorsen as a contributor but rather suggests that the combination of multiple drivers may have contributed to the serious platelet reductions. Of course proving causing effect for platelet declines is very challenging, so we continue to work on this. The situation with IONIS TTRRx is different. We've looked at natural history studies with patients with FAP and confirmed that they do in general have lower platelets. However, these patients do not experience he broad fluctuations of very low platelets the FCS patients experience. So, we do not think the natural history of the disease is likely to imply a major role on the cytopenia events we observe. We believe instead that the background prone inflammatory factors may be triggering the production of non-drug dependent anti-platelet antibodies which we have detected in some patients in our IONIS TTRRx FAP study. This is something that we are observing in the FAP patients in our IONIS TTRRx study but not in the FCS patients in our volanesorsen studies. Today we're working to understand what those prone inflammatory factors might be and to develop ways to identify the subset of FAP patients who may be at risk for platelet declines. To as of today, we are confident first of all there is no class effect on platelets with two primal ASOs. We believe that what we have observed in our TTR and volanesorsen programs are most likely unique events. And importantly unique from each other. With disease that likely contributing factor for the FCS patients and a background for inflammatory factors likely contributing to some TTR FAP patients. We have many ongoing investigations and we'll continue to keep you updated as we learn important new information. Notably, our platelet monitoring and both volanesorsen and IONIS TTR our ex program is working well. It is well accepted by patients and physicians treating these very ill patients. As we continue to advance our pipeline programs and add new drugs to our pipeline, you're going to see that more and more of our drugs are the more important to like us, Gen 2.5 or LICA plus Gen 2.5 drugs. The substantial increase in potency from these drugs means that we could treat patients with doses that are 10 fold or more lower than our standard two primal more drugs. And such low doses, we believe the risk of potential safety and tolerability issues including clinically meaningful platelet declines is dramatically reduced. And with that I'd like to turn the call over to Beth.