Ken Mills
Analyst · Morgan Stanley. Your line is now open
Thank you, Patrick, and good afternoon everyone. Thanks for joining us today. On today's conference call, we'll provide a recap of our recent progress and update on our product candidates and financial results for the second quarter of 2017. We will also review anticipated upcoming milestones for REGENXBIO. And then, open up the call for any 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 reminder, our AAV gene therapy product candidates are designed to deliver genes to cells to address genetic defects or to 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 improved patient outcomes. We are currently advancing an internal pipeline of product candidates that 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. And within each focus area, there are many diseases with urgent unmet medical need. Beyond our internal product 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 our own. Our NAV Technology Platform consists of over 100 novel adeno-associated virus vectors or AAV vectors, including AAV7, AAV8, AAV9, and AAVrh10. Our vectors are the result of world-class research conducted at the University of Pennsylvania in the lab of Dr. Jim Wilson. These efforts were aimed at discovering and developing safer and more effective gene delivery vehicle in those that had been previously discovered. The resulting AAV vectors, the foundation of our NAV Technology Platform, were found to have the following significant and differentiating attributes as compared to earlier generation AAV vectors: higher expression and increased durability, broad and novel tissue selectivity, reduced immune response, and improved manufacturability. REGENXBIO has an exclusive worldwide license to the NAV Technology Platform. Our goal is to utilize these vectors to enable the development of one-time disease altering gene therapy treatments. Before I review the past quarter and summarize our upcoming milestones, let me say a bit more about our commitment to patients in all that we do. Since our inception, our patient-focused mission has remained the same, even as our Company, our platform in the field of gene therapy has evolved significantly. Our support to patient communities we work with is unwavering. We're actively engaged with patient advocacy organizations to ensure that we have an acute understanding of the patient experience. And we are using these insights to guide the development of our product candidates and to allow us to be a reliable and compassionate partner with our patient communities. We believe single administration gene therapy treatment that significantly alter the course of disease will create a meaningful for the heroes we work with everyday, the patients and the families living with disease. I would now turn to an update of our product candidates in the retinal, metabolic, and neurodegenerative disease areas. Our product candidates are currently targeting the following indications; wet age-related macular degeneration or wet [technical difficulty] mucopolysaccharidosis Type I and Type II or MPS I and MPS II [technical difficulty] our retinal disease franchise. In May, we were pleased to announce the dosing of the first patient in the Phase I clinical trial evaluating RGX-314 for the treatment of wet AMD. And it affects more than 2 million patients in United States, Europe, and Japan. Wet AMD is characterized by abnormal blood vessel formation in the retina resulting in fluid leakage into the macula, causing diminished, distorted or even total vision loss. The standard of care therapy is for wet AMB inhibit vascular endothelial growth factor or VEGF. The neutralization of VEGF both reduces the fluid leakage from abnormal blood vessels and prevents their proliferation, which effectively controls the disease state and yields improvement in visual acuity. While effective, standard of care dosing regiments require frequent and inconvenient administration typically requiring injections in every eye every four to eight weeks. This frequent and inconvenient administration imposes a significant burden on patients and often leads to a lack of compliance. Lack of compliance has a direct impact on the disease state, impeding the efficacy of the therapeutic regimen and allowing progression of vision loss. Physicians and patients remain interested in new therapies for wet AMD due to the burden of the frequent treatment and the need for longer lasting effective therapies. 314 -- RGX-314 that is by contrast is administered with one time sub-retinal injection. Utilizing the NAV AAV8 vector, RGX-314 is expected to encode a gene from monoclonal antibody fragment and cells in the retina. The expressed protein is design to neutralized VEGF activity employing a similar mechanism as the standard of care. NAV AAV8 vector has been selected for this program because it has demonstrated effective transduction of retinal cells in multiple preclinical animal studies. We believe that one-time administration of a highly efficacious gene therapy product encoding inhibitor VEGF has the potential to address the challenges associated with existing therapies. We are currently enrolling patient in a multi-centre open labeled dose escalation Phase I clinical trial of RGX-314 in up to 18 wet AMD patients previously treated with and responsive to anti-VEGF therapy. The primary objective of this clinical trial is to evaluate the safety of one-time subretinal delivery of RGX-314 in up to 18 wet AMD patients at 24 weeks. Additionally, we will be evaluating several efficacy parameters including best corrected visual acuity and SD-OCT. The clinical trial is being conducted at six meeting retinal surgery centres across the United States. This Thursday, Dr. Steven Yoo, Chief Medical Officer, REGENXBIO will be presenting an overview of the program at the ophthalmology innovation summit as part of the 35 Annual Scientific Meeting of the American Society of Retinal Specialist or ASRS in Boston. Dr. Jeffrey Heier, Co-President and Director of the Retinal Research and Ophthalmic Consultants of Boston and a principal investigator of the RGX-314 Phase I clinical trial, will present the RGX-314 phase I clinical trial design and overview at the ASRS as well. We will be providing an interim update on the Phase I clinical trial by the end of 2017. I'll now turn to our metabolic franchise and the development of RGX-501 for the treatment of HoFH, for which there are -- we are currently enrolling patients in a Phase I, II clinical trial. HoFH is a rare genetic disorder caused by mutations in the gene encoding the low density lipoprotein or LDL receptor. The LDL receptor is responsible for the removal of LDL cholesterol from the blood stream. When mutations occur in LDL receptor genes, the LDL pathway is severely disrupted resulting in an accumulation of LDL cholesterol in the bloodstream that can lead to coronary artery disease at a young age, a severe and ultimately fatal condition. Current standard of care therapies for HoFH are often insufficient to lower LDL cholesterol to normal levels, requiring many patients to receive regular apheresis, a treatment associated with significant burden for patients and caregivers and one that does not ultimately correct the underlying cause of the disease. RGX-501 seeks to address the underlying genetic defect responsible for HoFH by correcting the receptor deficiency responsible for the disease pathology. As with all of our product candidates, RGX-501 is designed to be a one-time therapeutic administration, an approach that has the potential to alleviate treatment burden in filling urgent unmet need. Our gene therapy product candidate uses the NAV AAV8 vector, a vector that has demonstrated highly efficient transduction of hepatocytes or liver cells to encode a functional copy of the LDL receptor gene. The clinical trial is being conducted at the University of Pennsylvania. Enrolment continues to progress in the dose escalation Phase I, II clinical trial evaluating the safety and efficacy of intravenously administered RGX-501 in patients with HoFH. And we look forward to sharing an interim update with this Phase I clinical trial by the end of 2017. I would now like to share an update on our neurodegenerative franchise where we have two product candidates in development for diseases of the central nervous system or CNS; RGX-111 for the treatment of MPS I, and RGX-121 for the treatment of MPS II. MPS I and MPS II are rare genetic disorders that belong to a family known as lysosomal storage disorders. MPS I and MPS II are caused by defects in the IDUA and IDS genes respectively. In both diseases, the defective genes results in enzyme deficiencies that lead to accumulation of glycosaminoglycans or gags which would normally be broken down by the missing enzyme. Intracellular gag accumulation leads to cell and tissue damage causing severe disease pathology associated with a wide range of physical symptoms, and in severe patients, significant cognitive deficits. While they are approved and marketed enzyme replacement therapies for the peripheral symptoms of both MPS I and MPS II, treatment for the CNS symptoms of the disease are severely limited or nonexistent. As such, our programs are designed to address this area of urgent unmet medical need. Both RGX-111 and RGX-121 utilize the NAV AAV9 vector selected for its affinity to cells of the central nervous system to encode a healthy copy of the defective gene. Again as with all of our product candidates, we are employing a one-time administration approach. For RGX-111 and RGX-121, the therapy will be administered directly into the cerebrospinal fluid via an intracisternal administration to optimize the exposure of RGX-111 or RGX-121 to target cells in the CNS. We are pleased to announce that the investigational new drug application or IND for the Phase I clinical trial for RGX-111 for MPS I is active as of August 4, 2017. Site activation, the planned multi-centre open label multi-cohort dose escalation trial is now underway to support recruitment and patient enrollment. With the first patient expected to be dosed in the first half of 2018, we anticipate also filing an IND for RGX-121 for MPS II in the second half of 2017, which will incorporate feedback received from the FDA and its review of the IND application for RGX-111. In addition to our internal product candidates, we continue to advance and leverage for NAV Technology Platform through efforts of our external partners and licensees. As of June 30, 2017, our technology has been licensed to nine NAV Technology Licensees and is currently employed in the development of more than 20 partner product candidates, eight of which have advanced to clinical stages of development. As licensee program continue to move forward and achieve efficacy and safety milestone, we believe they further validate the strength of the NAV Technology platform and provide additional data that collectively drives the advancement of the AAV gene therapy space. One example demonstrating the strength of our platform and its potential for clinical significance is the announcement by our partner Shire of its submission of IND application for SHP654 which utilizes the NAV AAV8 vector to deliver the factor 18 for the treatment of hemophilia [technical difficulty] so as the broadly validate the use of gene therapy as a treatment modality as well as to specifically validate the use of our NAV Technology for the design of potentially transformative therapies. We also continue to be encouraged by partner such as AveXis which last quarter announced alignment with the FDA under good manufacturing practice or GMP, commercial manufacturing process for AVXS-101. AVXS-101 utilizes the NAV AAV9 vector to target spinal muscular atrophy Type I. This alignment with FDA marks a significant milestone creating a potential path forward for the use of their robust Phase I data as the basis for the company's plan to initiate a single arm pivotal trial for AVXS-101 in the U.S. in the third quarter of this year. In June, we were please to expand our partnership with AveXis through our exclusive worldwide license agreement for AveXis to develop and commercialize gene therapy treatments using the NAV AAV9 vector to treat two additional rare neurological monogenic disorders, Rett syndrome and ALS caused by mutations in the SOD1 gene. In summary, we had a very productive quarter, paving the way for a number of significant clinical advancements in 2017. And with that, I would now like to turn the call over to Vit for a review of our financials. Vit?