Brett Haumann
Analyst · Leerink. Your line is now open
Thanks Rick. I’ll begin on slide 4 and discuss the phase 2 trial of 9855 in norepinephrine and serotonin reuptake inhibitor in patients with neurogenic orthostatic hypotension or nOH. nOH is a rare autonomic disorder which presents in a proportion of patients with Parkinson’s disease as well as the majority of patience with multiple systems atrophy and pure autonomic failure. The phase 2 study of 9855 consisted of three parts; Part A was a single ascending dose from 1 milligram up to 20 milligrams, designed to evaluate the impact on blood pressure and standing time for 9855. Part B was a double blind single dose study designed to evaluate the impact on blood pressure for 9855 as compared to placebo. Following emergence of encouraging improvements in patients in Part A and in response to patients request to continue taking therapy, the study was amended to include Part C. This part of the study focused specifically on evaluating improvements in both blood pressure and symptoms in nOH and to repeat dose conditions. The primary assessment in the study was measured after four weeks, although patients can continue to receive medication for up to five months. Before I describe the data, I’ll take a moment to explain what we mean by OHSA question one and the symptom measurement scale used in nOH. OSHA stands for Orthostatic Hypertension Symptom Assessment, and it’s a validated scale assessing the presence of a range of symptoms in nOH including dizziness, weakness, problems with vision, fatigue, trouble concentrating and head and neck discomfort. It’s based on a scale from zero with no symptoms to 10, which is the worst possible to very serious symptom with reductions in OHSA indicating symptom improvements. OHSA question one specifically measures patients dizziness, light headedness, feeling things or feeling that they might blackout. OHSA question one has been accepted as a suitable endpoint in the investigation of nOH by regulatory agencies and was used in the conditional approval of droxidopa in nOH. With that in mind, I’ll turn your attention to slide 5 and the results we generated in the phase 2 study starting with observations from Part A and B. As we previously reported the majority of patients treated in Part A, 27 of 34 patients or 79% showed a response in improved systolic blood pressure of doses above 5 milligrams. We were very encouraged not only by the percentage of patients reporting improvements in this portion of the study, but also by their request to continue therapy beyond a single dose, which led to an additional Part C of the study. Part B was with single-dose placebo-controlled sub-study of 10 patients, 5 on placebo and 5 on active 9855, which showed a blood pressure improvement in Part A. These patients started from a lower than normal base line systolic blood pressure. The plots at the bottom of slide 5, shows systolic blood pressure response after dose. Placebo patients showed a continued drop in mean systolic blood pressure during the course of the day in response to postural changes and after meals, consistent with the underlying condition. In contrast, patients on 9855 showed an increase in mean systolic blood pressure during the day. The treatment difference between 9855 and placebo was 13 mm of mercury at the four hour time point, a statistically significant difference with a P value of 0.11. Importantly, there was no evidence of 9855 causing elevations systolic blood pressure at 12 hours or beyond at time when patients would be lying down to sleep and where supine hypertension is a risk with other therapies such as midodrine and droxidopa. Now moving to results from the Part C extension phase on slide 6, we were extremely pleased to observe that more than 75% of patients, 16 of 21 enrolled in Part C, continue to take their therapy after four weeks. In 16 patients showed a mean reduction of 2.4 points in the OHSA question one at four weeks, with more than 60% of patients showing a reduction of two points or more. Recall that patients were eligible to be enrolled in Part C based on their blood pressure response in Part A and also on severity of their dizziness. There is an OHSA question 1 threshold of four points or more that’s used by clinicians and in pivotal clinical trials to define patients with clinically meaningful dizziness. This is the threshold we’ll be using as an inclusion criterion in our phase 3 program. Applying this threshold, three of 16 patients were not symptomatic coming in to Part C, but 13 patients were. These 13 patients reported a mean OHSA question one reduction of 3.8 points from base line after four weeks of treatments. To put this in context, the droxidopa label reflects a maximum reduction of 2.3 points from baseline at one week of dosing and droxidopa has not been show in clinical studies to produce durable response beyond two weeks. In terms of blood pressure effect observed in the extension phase of this study, treatment with 9855 in Part C led to clinically meaningful increases in standing systolic blood pressure three minutes after standing up, with a 7 mm mercury or greater increase at all time points on all clinical [results]. Although patients could change their dose during the course of their study, the 10 milligram dose was the most frequently prescribed dose. \ 9855 was generally well tolerated through this four week testing period. The most commonly reported adverse event in Part C was urinary tract infection, a condition commonly associated with nOH as a result of impaired bladder function caused by autonomic nervous system dysfunction. There were four serious adverse events, but none were assessed as drug related. As Rick noted earlier, we are highly encouraged by this data and by the favorable responses to these results from urology experts who treat patients with nOH, and who are acutely aware of the debilitating nature of this condition and the unmet need it represents. As we had hoped when we undertook Part C, we believe the durability of effect on dizziness and blood pressure observed in patients on active therapy after four weeks of dosing may prove to be one of the key differentiating features for 9855. We will continue to track all patients through the remainder of their five months treatment period and will report detailed results from the full study at a future scientific meeting. We’ve also completed a series of interactions with the FDA to confirm the scope and design as a pivotal registrational program for 9855. We have clarity on the endpoints that will be required and are now in detailed planning activities to initiate the program in late 2018 or early 2019 testing the 10 milligram dose. We will be providing more details on the phase 3 program in future business updates. Now I’ll turn your attention to slide 7 and our phase 1b study of 1473 in ulcerative colitis. Recall that in February, we announced a global collaboration agreement with Janssen for the joint development and commercialization of 1473 and related backup compounds. We also previously communicated data from the first cohorts of 18 milligram dosed once daily. Recently we’ve completed the two additional cohorts, one dose in 20 milligrams and the other 270 milligrams once daily. While we and Janssen plan to provide complete results from the study at an upcoming major GI conference, I’d like to provide a little bit more detail on these two cohorts to provide further context in support of our confidence to progress the program in both ulcerative colitis and Crohn’s disease. A total of 40 eligible patients with moderate to severely active ulcerative colitis were enrolled across the three cohorts, and received either Placebo 20, 80 or 270 milligrams of 1473 once daily for 28 days, with approximately 10 patients in each arm. I’ll remind you that this study was not powered to evaluate efficacy and only dosed patients for four weeks, as opposed to most beta two and three induction studies that include eight weeks of dosing. Even with the shorter treatment period of only four weeks, we observed encouraging evidence of biological effects including on efficacy endpoints. Rates of clinical response were higher for all active doses than for placebo using both the partial Mayo and total Mayo definitions for clinical response. And the greatest effect was seen with a top dose. Rectal bleeding scores were improved relative to placebo for the 80 and 270 milligram doses. The most notable findings were that endoscopic improvement and even mucosal healing were reported in each of the three active treatment arms, while in contrast no patients in the placebo arm reported either endoscopic improvements or mucosal healing. Recall that all endoscopic readings were conducted essentially by a blinded gastroenterologist. Clinical responses were matched by dose dependent reductions in surrogate biomarkers, notably C-reactive protein and fecal calprotectin. The pharmacokinetic data from 1b study in patients also provided critical insights regarding the localized effect of 1473. Most importantly, personal levels of 1473 in patients were all very low across all three active dose groups consistent with those previously observed in healthy volunteers. In terms of tissue PK taken from 5C samples of the effective gut wall, there was evidence of dose-related increases in local GI tissue drug concentration. With 20 milligrams showing lower concentrations than either 80 or 270 milligrams and the latter two doses producing mean concentrations above the JAK IC50 or inhibitory concentration in the inflamed tissue. Data confirmed 1473 is being delivered locally to the gastrointestinal tract with minimal systemic absorption. There were two serious treatment emergent to adverse events, both hospitalizations for ulcerative colitis exacerbation. One occurred on a patient on 20 milligrams at day seven and one patient 10 days after completing treatment with the 80 milligram dose. Neither were assessed as related to study drug. There were no reports of systemic or opportunistic infections including Herpes zosterb or reports of intestinal proliferation. 1473 did not show any evidence of reducing white cell counts including NK cells or platelets or red cell markers. And while HDL showed dose dependent increases from low to normal levels possibly related to reduced inflammation, there was no evidence of elevated LDL relative to placebo. In summary, the phase 1b study of 1473 in ulcerative colitis patients demonstrated localized biological activity and minimal systemic exposure with a favorable safety and tolerability profile. The next ulcerative colitis study is a Phase 2b/3 induction and maintenance study in moderate to severely active ulcerative colitis patients. Patients will receive one of three doses of 1473, 20, 80 or 100 milligram or placebo once daily for eight weeks in the phase 2b induction study. Responders will then be rerandomized in to the phase 3, 44 week maintenance study. In a study designed and intended to improve efficiency and accelerate the clinical program. FDA and EMA have agreed to the design features and the study is planned to start in the fourth quarter of 2018. In Crohn’s disease, we plan to initiate a phase 2 induction study in the third quarter of 2018. This proof of concept study will assess two doses of 1473, 80 and 200 milligrams, given once daily for 12 weeks versus placebo. We and our partner Janssen are very excited about the progress in the 1473 program, and its potential to transform the treatment of gastrointestinal diseases. Turning now to slide 8, and Revefenacin, a once daily nebulized LAMA for the treatment of COPD and for which we are pleased to share today the proposed brand name Yupelri. Our NDA is currently under the review. As we’ve previously noted in the first quarter we completed our mid-cycle review meeting with the FDA. We remain on track for the PDUFA dates of November 13, 2018. If approved Yupelri will be the first once daily nebulized LAMA for COPD patients, an attractive proposition over current standard of care based on the market research we’ve completed. We and our partners Mylan see significant commercial opportunities in three major market settings, in-patients, out-patients, and during the hospital discharge transition period. Our joint commercial planning includes a strategy Theravance Biopharma to leverage its hospital base sales force in the in-patient setting, for Mylan to capture the very large out-patient markets and for combined efforts by both companies in the hospital discharge arena. We’re also determining responsibilities for other commercialization elements such as DME providers and distribution channels. Now I’ll pass the call over to Rene for a financial update.