Brett Haumann
Analyst · SVB Leerink. Your line is open
Thank you, Frank. Turning to Slide 8, TD-0903 a lung selective nebulized JAK inhibitor is currently in development for the treatment of hospitalized COVID-19 patients, who require oxygen support. 0903, has the potential to inhibit the pulmonary inflammation that's associated with severe COVID-19 disease, in an effort to reduce the number of patients who require admission to ICU for assisted ventilation, the duration of hospital stay and the risk of death. As previously reported, when the pandemic took hold around the world early last year, we moved 0903 quickly into the clinic, where we evaluated a range of nebulized doses of the single and multiple doses in a Phase 1 study in healthy volunteers. Moving to Slide 9, the healthy volunteer data showed 0903 to have a favorable safety and tolerability profile and low systemic PK. This data allowed us to initiate a two part Phase 2 study. Part 1, was a placebo controlled, double blind, multiple ascending dose study, evaluating three nebulized dose levels, 1, 3 and 10 milligrams in hospitalized patients with COVID-19, compared to placebo with eight patients in each cohort. Today, we're sharing the initial data from Part 1, that has informed our confidence to progress to Part 2, our larger placebo controlled study of 198 patients, testing the 3 milligram dose of 0903 added to standard of care. Part 2 is actively enrolling patients, and we expect to report results in the second quarter of 2021. Turning to Slide 10, Part 1 is a small sub study, intended to assess safety, PK and exploratory clinical measures, but has nevertheless provided us with directional information about the potential of 0903 in COVID-19. 0903 was well tolerated in hospitalized COVID-19 patients, as it had been in healthy volunteers in Phase 1. There were no drug related serious adverse events, although one patient in the 10 milligram cohorts met predefined stopping rules and was withdrawn as a precaution due to an isolated incidents of high ALT. This patient recovered with no additional consequences. From a clinical perspective, it was encouraging to see 0903 show a positive trend versus placebo on a number of parameters, including improved clinical status, shortened hospital stay and fewer deaths, albeit in a small number of patients. As reported in our press release today, we saw a reduction in main hospital stay from 22.5 days on placebo to 15.3 days for those patients on a 3 milligram dose, and 15.2 days for those patients on the 10 milligram dose of 0903. In terms of mortality, we know that hospitalized COVID-19 patients have an increased risk of death, and in this study, there were two deaths in the placebo cohorts. One death in the 1 milligram cohorts and none in the 3 or 10 milligram cohorts. We also saw evidence of improvement in several bio-markets. And in keeping with our lung selective approach, we saw low systemic exposure at all doses. Moving to Slide 11, this histogram shows the clinical status quo for each dose during the seven day treatment period. At a score of five, shown in pink, indicating the clinical status on admission, with darker shades of red, showing levels of deterioration, and levels of grey and blue showing levels of improvement. Now, I must continue to remind you, this is a small study group. But what is noteworthy is that the number of patients in the placebo group continue to decline after admission into the hospital, with 50% requiring intubation by day seven. In contrast, none of the patients in the 0903 cohorts declined during the seven day treatment period, and some patients show evidence of improvement. Turning to Slide 12, the numerical differences between placebo and 0903 cohorts continue for the remainder of the 28-day observation period. With the treatment effects more marks for the 3 and 10 milligram cohorts than the 1 milligram cohort. Moving to Slide 13, 0903 also demonstrated the same consistent PK characteristics that had previously been seen in the healthy volunteers, with low dose dependent concentrations in the blood, following once daily administration for seven days, that were well below those expected to inhibit systemic JAK pathways, and consistent with our intended profile for this lung selective nebulized pan-JAK inhibitor. Note that we administered a loading dose on day one of double the dose in the 1 and 3 milligram dose groups, in order to achieve steady state levels more quickly in the lung, in recognition of the fact that hospitalized COVID-19 patients on oxygen are prone to deteriorate quickly after admission. Turning to Slide 14, the data from Part 1, including safety and exploratory clinical data across all of the doses informed our decision to progress the 3 milligram dose into Part 2 of the study. If the data from Part 1 is ultimately predictive of what we see in Part 2, including these days are showing the improvements in oxygenation in the blood, with the 3 milligram dose compared to placebo over the seven day treatment period, then, 0903 could potentially offer an important additional treatment option for hospitalized COVID-19 patients. Importantly, 0903 offers the potential for broad pan-JAK and anti-inflammatory therapy in the lung, without increasing the risk of systemic side effects that are associated with other JAK inhibitors, including the risk of blood clotting, already a high risk in patients with COVID-19. 0903 also targets the lung inflammation caused by COVID-19, not the Coronavirus itself. So, it should not be affected by which mutational strains of COVID-19 cause this acute lung injury. In fact, 0903 could potentially produce similar anti-inflammatory effects in response to other sources of acute lung injury, including influenza, higher influenza, and other coronaviruses, such as MERS and SARS. We look forward to updating you on our progress with 0903 next quarter, when we expect we'll have data from Part 2. I'll now turn the call over to Andrew for the financial updates.