Brian Lian
Analyst · H.C. Wainwright. Please go ahead
Thanks Mike. Building on the progress we achieved during 2017, we at Viking continued to advance each of our active programs during the first quarter of 2018. I’ll first provide an update on VK5211, Viking’s lead program for the treatment of muscle and bone disorders. VK5211 is an orally available non-steroidal selective androgen receptor modulator, or SARM, designed to selectively stimulate muscle and bone formation with reduced activity in peripheral tissues, such as skin and prostate. In November of last year, we announced positive results from a Phase 2 clinical trial evaluating VK5211 in patients who had suffered a recent hip fracture. Following surgery to repair hip fracture, many patients experienced losses of bone and muscle at accelerated rates, placing them at increased risk of further morbidity, refracture and prolonged disability. For these reasons, hip fracture is a serious medical condition. And as our population continues to age, the incidence of hip fracture and other fracture injuries is expected to significantly increase. It’s our belief that VK5211 may represent an important treatment option for these patients by stimulating the formation of new muscle and bone, thereby improving musculoskeletal health and facilitating the recovery from fracture related injuries. As we reported last November, our Phase 2 clinical trial in hip fracture patients successfully achieved its primary endpoint, demonstrating statistically significant dose-dependent increases in lean body mass, less head, following 12 weeks of treatment with VK5211 as compared to placebo. The study also achieved important secondary endpoints, demonstrating statistically significant increases in appendicular lean mass, which is muscle in the limbs and total lean body mass, for all doses of VK5211 compared to placebo. In addition, though not power for significance, endpoints assessing physical functions showed numerical trends favoring treatment arms. Importantly, VK5211 also demonstrated encouraging safety and tolerability in this study, with no drug-related serious adverse events reported. We have submitted these data for presentation at an upcoming medical conference. We believe that results from the Phase 2 study provide strong evidence for VK5211's efficacy in stimulating muscle growth and we are preparing to request a meeting with the FDA to discuss potential next steps with the program. As we’ve outlined in prior calls, subsequent studies for this program will require the commitment of substantial financial resources. And we believe these efforts would be best executed by a partner, particularly one with an existing bone or musculoskeletal franchise. We are currently exploring partnering opportunities that will allow us to optimize the value of VK511 and move the program forward in the most efficient manner possible. We will provide further updates on these activities as warranted. I’ll now turn to our second clinical program, VK2809, which is in a Phase 2 study enrolling patients with nonalcoholic fatty liver disease and elevated LDL-cholesterol. VK2809 is a novel, orally available small molecule thyroid receptor agonist that possesses selectivity for liver tissue, as well as the beta receptor subtype. Previous studies have demonstrated that treatment with VK2809 leads to rapid histologic improvement in animal models of liver disease, as well as significant reductions in plasma lipids in humans. In a prior phase 1b study in subjects with mild hypercholesterolemia, VK2809 was shown to significantly reduce not only LDL-cholesterol and triglycerides, but also both lipoprotein A and apolipoprotein B, two proteins associated with increased risks of cardiovascular disease. These data suggest potential long-term cardiovascular benefits that may extend beyond those provided by LDL reduction alone. The overall profile of VK2809 thus far suggests promise in diseases that results from lipid dysregulation, as well as those related to liver fat such as NASH. In 2017, we announced data from a study of VK2809 in an animal model of NASH. The study was designed to evaluate VK2809 dosed orally once per day for eight weeks in rodents that had developed true diet-induced NASH as confirmed by a pre-study biopsy. In the study, animals receiving VK2809 demonstrated statistically significant reductions in liver fibrosis, liver collagen content, liver steatosis, and the non-alcoholic fatty liver disease activity score, also known as NAS, which is a composite measure of steatosis, inflammation and ballooning. We believe the combination of prior human and animal data for VK2809 provides strong support for its potential benefit in liver disease, and we expect the results from our ongoing clinical trials to provide further evidence of VK2809’s promise in the setting of NASH. Our Phase 2 trial is a randomized, double-blind, placebo-controlled, parallel group study designed to assess the efficacy, safety and tolerability of VK2809 in patients with elevated LDL-cholesterol and non-alcoholic fatty liver disease. Patients are being randomized to receive once-daily oral doses of VK2809 or placebo for 12 weeks, followed by a four-week off-drug phase. The trial's primary endpoint will evaluate the effect of VK2809 on LDL-cholesterol after 12 weeks compared to placebo. Secondary and exploratory endpoints include assessments of changes in liver fat content, plasma lipids, and inflammatory markers. During the first quarter, we continued to enroll new patients in this study. We’re nearing completion of enrollment and remain on target to announce results for the trial in the second half of 2018. I'd now like to provide an update on Viking's rare disease programs, evaluating VK2809 in glycogen storage disease type Ia, or GSD Ia, and VK0214 in X-linked adrenoleukodystrophy or X-ALD. Both GSD Ia and X-ALD are debilitating diseases with no available treatments. This unmet medical need creates an opportunity for Viking’s candidates to potentially be first-in-class and best-in-class therapies. And due to the fact that these are rare diseases, the required trial sizes and associated expenses are likely to be lower than for larger indications, opening the door to Viking potentially advancing these programs independently without the support of partner. I’ll first discuss our program evaluating VK2809 in glycogen storage disease type Ia. GSD Ia is an orphan genetic disease caused by a deficiency of glucose-6-phosphatase, an enzyme responsible for the liver's production of glucose from glycogen and gluconeogenesis. The disease results in an increased triglyceride production and elevated hepatic triglyceride content. This can potentially lead to hepatic steatosis, hepatic adenomas, and hepatocellular carcinoma. In the third quarter of 2017, we reported final results from an in vivo proof-of-concept study, which evaluated VK2809 in a model of GSD Ia. This study was conducted under a sponsored research agreement between Viking and Duke University. The results demonstrated that treatment with VK2809 led to statistically significant reductions in key metabolic markers of GSD Ia, including liver triglyceride content and total triglycerides. We believe the improvements observed in this study provide strong support for the continued development of VK2809 as a treatment of GSD Ia. During the first quarter of 2018, we filed an IND to advance VK2809 into a proof-of-concept study in patients with GSD Ia. We expect this trial to begin dosing later this quarter. Our second rare disease program is evaluating our novel thyroid beta agonist, VK0214 in X-linked adrenoleukodystrophy or X-ALD. X-ALD is a devastating disease caused by a defect in peroxisomal transporter called ABCD1. Patients with X-ALD are often characterized by the accumulation of very long chain fatty acids in plasma and tissue. Sustained elevations in very long chain fatty acids are believed to contribute to the severe cerebral and motor neuron toxicities commonly observed in this disease. Activation of the thyroid beta receptor is believed to stimulate the metabolism of very long chain fatty acids, providing a potential therapeutic benefit. VK0214 is an orally available small molecule thyroid receptor agonist that possesses selectivity for the beta receptor subtype and may therefore represent a potential pharmacologic approach to the disease. In 2017, we along with our collaborators at the Kennedy Krieger Institute, completed a 25 week study evaluating VK0214 in an animal model of X-ALD, called the ABCD1 knockout model. The results from this study showed that treatment with VK0214 for 25 week led to significant reductions in plasma levels of multiple very long chain fatty acids, including the benchmark highly toxic C26 fatty acids. In addition, the results showed improved expression of the compensatory transporter known as ABCD2 in both peripheral and CNS tissues. As I mentioned earlier, the accumulation of very long chain fatty acid is believed to contribute to the underlying pathology of X-ALD. Thus these data showing reduced very long chain fatty acids, as well as improved transporter expression, provide additional support for the role of selective thyroid receptor beta activation as a potential therapeutic approach to the treatment of X-ALD. We recently initiated IND enabling work for VK0214 and plan to file an IND to conduct a proof-of-concept study in X-ALD 2019. In conclusion, I'll reiterate that the first quarter has been an exciting and productive period for Viking as we continue to build on the momentum from 2017. We continue to explore partnering discussions around our novel SARM, VK 5211 per hip fracture and are preparing to request a meeting with the FDA on potential next steps with the program. With respect to our novel thyroid receptor beta agonist, VK2809 for fatty liver and hypercholesterolemia, we continue to roll patients in our Phase 2 trial and remain on track to announce data from this study in the second half of the year. Lastly, we are advancing our rare disease programs targeting glycogen stores disease and X-linked adrenoleukodystrophy. We expect to initiate a proof-of-concept trial for VK2809 and GSD Ia in the coming weeks, and we plan to complete IND enabling studies for VK0214 in X-ALD later this year. Each of these programs represent exciting future opportunities for Viking. This concludes our prepared statements for today. Thanks for your support and thanks for joining us on today's call. And I’d now like to open the line for questions. Operator?