Cindy Jacobs
Analyst · Michael Higgins of Ladenburg Thalmann. Your line is open
Thanks, Rick. The ORCA-2 safety trial builds on our experience from the successful ORCA-1 trial. Valuable lessons were learned, which have been integrated into the trial design, along with specific requirements requested by FDA. We have consulted frequently with our key opinion leaders, who have given us the benefits of their wisdom and we are now finalizing preparations to commence the trials in the fourth quarter. ORCA-2 is a multi-center, double blind, randomized, placebo-controlled Phase 3 study that will randomize 750 adults, who are daily cigarettes smokers, intending to quit smoking, and are willing to set a quit date within seven days of starting treatments. Participants will be randomly assigned with equal probability to one of three arms. Arm A will receive 12 weeks placebo treatment, Arm B will receive six weeks of cytisinicline, and then be switched to placebo for the latter six weeks, and arm C will receive 12 weeks of cytisinicline. There will be 250 subjects in each arm, receiving either placebo or cytisinicline three times a day for the 12-week study treatment period, and then followed monthly out to week 24 for a six-month evaluation. All 750 subjects will receive behavioral support during the entire 24 weeks. Similar to ORCA-1, each smoker will start study drug treatment the day after being randomized, and will have their quit date set within the following five to seven days, or at least by the end of the first week of treatment. Starting after their quit date, at least two of treatments, assessments for smoking abstinence will begin by weekly self-reporting of abstinence or not, with biochemical verification of abstinence by exhaled carbon monoxide levels. These weekly assessments occur through the 12 weeks of blinded study treatment, then monthly follow-up assessments will occur for smoking abstinence at week 16, 20, and finally, week 24. The ORA-2 study has two independent primary endpoints that will be evaluated. The primary endpoint outcomes will evaluate the rate of smoking abstinence of cytisinicline treatment at both the end of six weeks and 12 weeks treatment periods compared to the placebo treatment. For both primary and point comparisons, smoking abstinence will be defined as continuous abstinence during the last four weeks of treatment. That means for the six-week treatment period, successful quitters must have smoked zero cigarettes with weekly CO biochemical verification at weeks three, four, five, and six assessments. For the 12-week treatment period, successful quitters must have smoked zero cigarettes with weekly CO biochemical verification at weeks nine, 10, 11 and 12 assessments. The secondary endpoint outcomes will evaluate for continued smoking abstinence from the end of six weeks cytisinicline treatment to week 24, and from the end of 12 weeks cytisinicline treatment to week 24, separately and compared to placebo treatment within these same timeframes. An additional secondary endpoint outcome will look for a reduction in risk of relapse from weeks six to 24 in subjects receiving cytisinicline for six weeks versus 12 weeks. The sample size for this study is specified as 250 subjects per arm. This assumes a difference of 12% benefit for cytisinicline over placebo, with 96% power. ORCA-2 will enroll at approximately 15 clinical sites across the U.S. Each site will have specific COVID-19 protection operating procedures in place. We are preparing for potential restricted site interactions if a site needs to be quarantine, with remote testing or monitoring and procedures for missing data, per FDA guidelines, if a subject becomes infected with COVID-19 and cannot be evaluated. From a regulatory update and perspective, we have now completed all required non-clinical submissions to initiate our Phase 3 program. This has included submitting to FDA all the non-clinical data required to support the six and 12 weeks of cytisinicline treatment in the Phase 3 trial. In addition, we have submitted the final protocol for the ORCA-2 Phase 3 trial. As discussed last fall, we reviewed the Phase 3 protocols and the statistical plans with the FDA in a Type B meeting in November of 2019, and have incorporated FDA input from that meeting into that final protocol. We are now proceeding with the final operational planning and logistics to initiate the Phase 3 in the fourth quarter. So in summary, we intend to initiate ORCA-2 in the fourth quarter of this year, and this trial will address three key factors, the evaluation of the higher three-milligram dose of cytisinicline for both six and 12 weeks of treatment, the simplification of the dosing schedule given only three times daily, leading to ease of use, regardless of treatment duration, and the extension of the treatment duration of six and 12 weeks to potentially increase quit rates and yield more durable efficacy results. The extension of the dosing period in the Phase 3 trial has significant benefits. It will allow us to measure the primary endpoint of four weeks of continuous abstinence, while subjects are still receiving cytisinicline treatment. This wasn't possible with a 25-day treatment period in the ORCA-1 trial. As documented in the literature, measuring efficacy while subjects are and remained on treatment typically results in higher quit rates. I will now turn the call over to John to discuss recent financing activities and our second quarter results.