Jay Luly
Analyst · RBC Capital Markets
Thank you, Carol. Good afternoon, everyone and thank you for joining us today. Our goal for the past several years is to become a leader in the field of viral infections and liver diseases through investing in and diversifying into other disease areas with significant unmet need and market opportunity, all without the necessity of additional dilutive equity financing. I am proud to say that we have accomplished many of our objectives. Specifically, in the past year we have advanced all our wholly-owned programs and currently have three Phase 2 clinical trials ongoing in RSV, NASH and PBC and a clinical study of our first HBV candidate is expected to begin next year. Enanta’s scientific expertise has been validated by our partner of HCV protease inhibitor program, which has resulted in two approved products marketed by AbbVie, including MAVIRET, currently the leading HCV drug treatment in the world. Royalties from our Abbvie collaboration have provided a strong financial foundation to fund our wholly-owned in-house efforts. As we have significantly grown our clinical pipeline, we have kept our financial resources strong with ongoing royalties and a cash balance of $325 million while continuing to discover new compounds and advancing our wholly-owned programs in the clinic, which I will now discuss. One of our most exciting near-term opportunities is EDP-938, our product candidate for respiratory syncytial virus or RSV. EDP-938 is a potent non-fusion inhibitor targeting the N-protein in RSV and the only N inhibitor in clinical development today. EDP-938 works by inhibiting the replication process of the virus and as a result has the potential to be more effective when used at later stages of RSV infection than fusion inhibitors. Recently, we successfully completed a Phase 1 study of EDP-938 and are quite pleased with the safety and pharmacokinetic profile of this first-in-class compound. The Phase 1 results were presented at the 11th International Respiratory Syncytial Virus Symposium earlier this month and demonstrated that EDP-938 was generally safe and well-tolerated over a broad range of single and multiple doses with a good pharmacokinetic profile suitable for a once or twice-daily oral dosing. An important observation to note is that mean trough levels in the Phase 1 study were approximately 30 times higher than the EC90 of EDP-938 against RSV infected human cells tested in vitro. In general, achieving drug concentrations at a significant multiple over the antiviral EC90, a measure of potency for the compound is crucial to the success of progressing an effective antiviral drug. In October, Enanta initiated a Phase 2a human challenge study in healthy adults inoculated with RSV. This randomized, double-blind, placebo-controlled human challenge study will enroll up to 114 healthy adult subjects, who will be randomized into one of two drug dosing arms or a placebo arm and dosed for 5 days. Primary and secondary outcome measures include changes in viral load measurements and changes in baseline symptoms. Given the relatively short dosing duration of this study, we expect to announce preliminary data in the third calendar quarter of 2019. Moving to NASH and PBC, enrollment continues for our two Phase 2 clinical trials in NASH and PBC with EDP-305, our FXR agonist candidate. Both studies are 12-week randomized, double-blind, placebo-controlled studies evaluating the safety, tolerability, pharmacokinetics and efficacy of EDP-305 in subjects with NASH and PBC. We anticipate sharing initial data starting with NASH in mid-2019. Recruitment in PBC has been challenging due to multiple clinical trials attempting to access a very limited number of available patients for this potential second line therapy in an orphan indication. We will continue to provide further updates on PBC enrollment in the coming months. In NASH, we are accumulating data and building on our extensive preclinical knowledge of our FXR agonist EDP-305. Earlier this month, two preclinical posters from the lab of Dr. Bryan Fuchs at Massachusetts General Hospital were presented at the liver meeting. One poster demonstrated that in a rat model of cirrhosis and hepatocellular carcinoma or HCC, EDP-305 reduced serum markers of liver injury, fibrosis, ascites development, HCC development and mortality. The second poster demonstrated reduced fibrosis progression in a rat model of NASH cirrhosis suggesting EDP-305 may have potent anti-fibrotic effects in late stage liver disease. We have a long-term commitment to NASH and we are identifying new follow-on FXR agonist leads from continuing our ongoing discovery work in non-FXR mechanisms anticipating the likely need for a combination therapy in this indication. Lastly, I am very excited to highlight our announcement of the selection of EDP-514 as our first development candidate from our HBV program. EDP-514 is a core inhibitor, also referred to as a capsid assembly modulator or a core protein allosteric modulator. These are a new class of HBV inhibitors that can disrupt the assembly and replication of this virus at multiple steps in the viral lifecycle. Based on our preclinical data, we believe EDP-514 has best-in-class potential for the core inhibitor mechanism. In 2019, we plan to present this compelling preclinical data and initiate a Phase 1 clinical study of EDP-514, which will include a Phase 1b portion in chronic HBV patients. In addition, we are exploring other anti-HBV approaches as we believe that it may be necessary to utilize multiple mechanisms for the treatment of HBV. Enanta had a strong 2018 and I would like to thank our dedicated employees who work tirelessly to achieve our goals. I would also like to thank the patients and their families that are participating in our clinical trials and I look forward to providing more updates in 2019. I will stop here and turn the call over to Paul to discuss our financial results for the quarter. Paul?