Bill Collier
Analyst · B. Riley. Your line is open
Okay, thank you very much, Pam. This is Bill Collier and thank you, everyone, for joining us on the call today. Hope you can hear us loud and clear.We appreciate that this is obviously a very busy time for many of you, and so we'll keep our comments this morning succinct and to the point.Now, as many of you know, in early October, we announced our decision to discontinue the clinical development of AB-506, our lead oral capsid inhibitor. That particular project was in Phase 1a/1b clinical trials for the treatment of Chronic Hepatitis B. Now, this decision was based on the fact that we observed two cases of acute hepatitis in a Phase 1a 28-day clinical trial in healthy volunteers. Now importantly, the two subjects concerned have experienced resolution of their acute hepatitis.We wanted to let you know that we will present results from both the healthy volunteer 28-day study as well as the AB-506 Phase Ia/Ib clinical trial in a late break-up poster session at the upcoming AASLD Meeting on November the 11th, and for those of you at the meeting, it will be held at 8 A.M in Hall B and the title of the poster is Safety Tolerability, Pharmacokinetics, and Antiviral activity of the capsid inhibitor AB-506 in healthy subjects and chronic hepatitis B subjects.Now, despite these unexpected results for AB-506, our mission at Arbutus remains unchanged and that is to improve upon the existing standard of care in Hepatitis B by developing a curative combination regimen that includes several different mechanisms of action.So right now we're focused on four areas. We're focused first of all on completing the Phase 1a/1b clinical trial of AB-729, our proprietary GalNAc delivered RNAi compound.Second, we're focused on selecting a next-generation capsid inhibitor for IND enabling studies.Thirdly, we're focused on announcing a go/no-go decision on our RNAi; I’m sorry RNA de-stabilizer AB-452.And fourthly, we're focused on advancing our research efforts for oral compounds that inhibit PDL-1. So let me add a little more detail on each one of these areas.Regarding AB-729, we've completed dosing in the healthy subject portion of the ongoing Phase 1a/1b clinical trial. And we're now in the process of dosing and evaluating single dose cohorts in chronic hepatitis B subjects. We intend to report preliminary safety and efficacy results from this portion of the Phase 1a/1b clinical trial in the first quarter of 2020.Turning now to our capsid inhibitor program. We have a number of oral next-generation compounds with chemical scaffolds that are distinct from AB-506 and other competitive compounds that we believe have the potential to contribute to the inhibition of HBV replication as part of a combination regimen. Now these compounds are substantially more potent than 506.We’re presenting a poster of the AASLD Meeting detailing these next-generation capsid compounds. The poster is entitled novel HBV capsid inhibitor compound series demonstrates improved inhibition of HBV WTT-33 and I105T core protein variants and shows a unique binding mode to core protein.And again, for those of you who are going to the meeting, that poster will be presented on November the 8th at 8 A.M. in Hall B in the session entitled Hepatitis B Therapeutics New Agents.I want to let you all know that our objective is to select one of these compounds for IND enabling studies by December of this year.Now, as you're likely aware, AB-452 is our oral RNA destabilizer which leads to reductions in all HBV proteins including S-antigen and we continue to expect announcing a go/no-go decision in early 2020.In addition to our capsid and RNA destabilizer programs, we continue to make progress with our oral small molecule PDL-1 program. We still believe that immune reawakening will be an important element in developing a curative combination and we hope to select a compound in this area for IND enabling studies by the end of 2020.So now let me turn the call over to Dave, our CFO, for his summary of our most recent financial results. Over to you, David?