Ken Mills
Analyst · Morgan Stanley. Your line is now open
Thank you, Patrick, and thank you all for joining us here this afternoon. On today's conference call, we'll share an overview of our progress over the past three months, an update on our development programs, and financial reports and results for the first quarter of 2017 as well as provide a look at our upcoming milestones. After that, we will open the call for questions. At REGENXBIO, our mission is to improve the lives through the curative potential of gene therapy based on our proprietary NAV Technology Platform. As a remainder, our AAV gene therapy product candidates are designed to deliver genes to cells to address genetic defects or enable cells in the body to produce therapeutic proteins that are intended to impact disease. Through a single administration, our AAV gene therapy product candidates are designed to provide long-lasting effects, potentially significantly altering the course of disease and delivering important patient outcomes. We are currently advancing an internal pipeline of product candidates, which employ our proprietary NAV Technology Platform within three disease areas; retinal diseases, metabolic diseases and neurodegenerative diseases. These areas of focus have been strategically selected because we believe they can be uniquely addressable by our vectors [audio dip] there are many diseases with urgent unmet medical need. Beyond our internal development programs, we selectively license components of our NAV Technology Platform, most typically single vectors for single indications to third-party companies whose vision and commitment to gene therapy is aligned with ours. Our NAV Technology Platform consists of over 100 novel adeno-associated viral vectors or AAV vectors, including vectors like AAV7, AAV8, AAV9 and AAVrh10. Our vectors are the result of world-class research conducted at the University of Pennsylvania in the lab of Jim Wilson. These efforts were aimed at discovering and developing safer and more effective gene therapy vehicle than those previously [audio dip] resulting AAV vectors, the foundation of the NAV Technology Platform, were found to have the following significant and differentiating attributes as compared to earlier generation AAV vectors, including higher expression and increased durability, broad and novel tissue selectivity, reduced immune response, and improved manufacturability. REGENXBIO has an exclusive worldwide license to these AAV vectors. Our goal is to utilize these vectors to enable the development of one-time disease altering gene therapy treatments. Since our inception, our patient-focused mission remains the same, even as our Company or platform in the field of gene therapy evolves. Our support of patient communities we work with is unwavering. We're actively engaged with patient advocacy organizations to have an acute understanding of the patient experience, which guides our program development and allows us to be a reliable and compassionate partner to the patient communities we serve. We believe we are advancing towards the future where a single administration gene therapy treatment that significantly alter the course of disease and deliver improved patient outcomes will become a reality. In March, we made a valuable addition to our management team, who we believe will be instrumental in helping us achieve our mission. With the appointment of Olivier Danos as the Company's Chief Scientific Officer. Dr. Danos is a respected leader in gene therapy space and brings to REGENXBIO an immense step to [audio dip] scientific experts. Olivier most recently served as Senior Vice President, Cell and Gene Therapy, at Biogen where he worked to develop novel technologies for gene transfer and genome engineering. We're very excited to have Dr. Danos as a member of our team, believe his experience, knowledge will contribute to the advancement of our REGENXBIO's programs, will enable our Company to remain at the forefront of innovation of gene therapy. Additionally in March, we bolstered our balance sheet through the closing of an underwritten public offering of 3.7 million shares of common stock, followed by the exercise installed by the underwriters of their option to purchase 555,000 shares from the Company in April, each at a price of $20.50 per share from which we raised an aggregate gross proceeds of $87.2 million. I'd now like to turn to an update on our product programs, which currently target the following indications: wet age-related macular degeneration or wet AMD, homozygous familial hypercholesterolemia or HoFH, and Mucopolysaccharidosis Type I MPS I, and Mucopolysaccharidosis Type II MPS II. I'll begin with RGX-314 for the treatment of wet AMD, our lead therapeutic candidate in our retinal disease franchise. Wet AMD, which may impact over 2 million individuals in the US, EU and Japan combined is characterized by [audio dip] resulting in fluid leakage that leads to diminished, distorted, or even total vision loss. The current standard of care for wet AMD is the treatment with one of a class of vascular endothelial growth factor or VEGF inhibitors, which neutralize VEGF activity to impair the formation of these blood vessels that lead to this vision loss. While effective, these standard of care therapies require frequent and inconvenient administration by injections directly into the eye, with typical dosing regimens requiring administration every four to eight weeks to maintain efficacy. This dosing regimen places a burden on the patient, and often results in a lack of compliance. Patients often experience vision loss with reduced frequency of treatment. Utilizing the NAV AAV8 [audio dip] RGX-314 is expected to gene for monoclonal antibody fragment. The expressed monoclonal antibody fragment is designed to neutralize VEGF activity, employing a similar mechanism as a standard of care therapy to inhibit formation of abnormal vasculature and retinal fluid accumulation. The NAV AAV8 vector has been selected because it's demonstrated effective transduction of retinal cells as observed in multiple preclinical animal studies. RGX-314 is administered with one-time sub-retinal injection. Site activation is underway at six leading retinal surgical centers in the U.S. for our Phase I clinical trial of RDX-314. Drug has been shipped to a number of sites in anticipation of dosing of our first patient, which remains on track for mid-year 2017. This will be a multi-center, open-label, multi-cohort dose escalation trial. The primary objective of this study is to evaluate the safety and tolerability of a one-time sub-retinal delivery of RGX-314 in up to 18 wet AMD patients at 24 weeks. Additionally, [audio dip] including best corrected visual acuity and SD-OCT. We are developing RGX-314 under a multi-institutional collaboration with world renowned gene therapy ophthalmology experts including Jim Wilson, Jean Bennett and Al Maguire at Penn's Gene Therapy Program and Center for Advanced Retinal and Ocular Therapeutics, and Dr. Peter Campochiaro at Johns Hopkins Wilmer Eye Institute. We look forward to sharing an interim update from this Phase I trial by the end of this year. I'll now turn attention to our metabolic franchise, in RGX-501, our clinical candidate for the development of treatment of HoFH. HoFH is a rare genetic disorder caused by a defect in the low-density lipoprotein or LDL receptor gene. The LDL receptor is responsible for processing LDL cholesterol. When mutations occur in both the LDL receptor genes or in both of the copies of the LDL receptor gene, the LDL pathway is severely disrupted resulting in an accumulation of LDL cholesterol in the blood stream that can lead to coronary artery disease at a very young age, a severe and ultimately fatal condition. RGX-501 is designed to address the underlying genetic defect by correcting the receptor deficiency responsible for disease pathology. One-time administration of RGX-501 [indiscernible] because this vectors demonstrated focus on liver cells is designed to deliver a healthy copy of the LDL receptor to those cells. In March, we were pleased to announce the dosing of the first patient in our Phase I/II trial evaluating RGX-501. Patients receiving one-time intravenous administration of drug will be evaluated for safety as a primary endpoint, but secondary endpoints will include LDL cholesterol reduction at 12 weeks and other clinical outcome measures. Enrollment is progressing, and we look forward to sharing an interim update from this Phase I/II trial by the end of the year also. I'll now finally turn our attention to our neurodegenerative franchise where we have two product candidates in development, RGX-111 for the treatment of MPS I and [audio dip]. MPS I and MPS II are both rare genetic central nervous system or CNS disorders caused by a defect in the IDUA and IDS genes respectively. These genetic defects lead to deficiencies in the lysosomal enzymes required for breakdown of waste products within cells and results in both physical symptoms and significant cognitive decline. While there are approved marketed therapies for the peripheral symptoms of both MPS I and MPS II, treatments for the CNS symptoms of the disease are severely limited or non-existent. As such, our programs are designed to address this area of urgent unmet medical need. In this case, we are using the NAV AAV9 vector for both RGX-111 and RGX-121 due to this vector's affinity for the central nervous system cells. We are employing a one-time administration of therapy directly into the cerebrospinal fluid via an intracisternal administration to optimize exposure of RGX-111 and RGX-121 to target cells. We plan to file INDs for the Phase I/II trials of RGX-111 and RGX-121 in mid-2017. Because these programs are closely linked, we will wait to file the IND for RGX-121 until the IND for RGX-111 is active, so that we may effectively incorporate any regulatory feedback from our interactions around RGX-111 into our submission for RGX-121 as appropriate. In addition to our internal development programs, we're advancing our NAV Technology Platform through the efforts of partners and licensees. And as of March 31, 2017, our technology has been licensed to nine NAV Technology licensees and is currently employed in the development over 20 partnered programs and partner product candidates. As licensee programs continue to move forward and achieve safety and efficacy milestones, we believe that they validate the strength of the NAV Technology Platform and provide additional data that collectively drive the advancement of the AAV gene therapy space. We continue to be encouraged by partners such as AveXis, which recently presented results from its Phase I [audio dip] AVXS-101 at the Annual Meeting of the American Academy of Neurology. AVXS-101 utilizes the NAV AAV9 vector to target spinal muscular atrophy Type 1. The data presented demonstrate a sustained efficacy profile and showcase the transformative potential of gene therapy as a therapeutic modality. All in all, 2017 has been off to a productive start and promising start paving the way for several clinical advancements in 2017. With that, I'll turn the call over to Vit for a review of our financials.