of that meeting once the official minutes are available, which we anticipate to be in the fourth quarter of 2017.
License Agreement with REGENXBIO for Rett Syndrome and Genetic ALS
On June 7, 2017, we announced that we had entered into an exclusive, worldwide license agreement with REGENXBIO Inc. for the development and commercialization of gene therapy using the recombinant adeno-associated virus serotype 9, or NAV AAV9, vector to treat two rare neurological monogenic disorders: Rett syndrome and a genetic form of amyotrophic lateral sclerosis, or ALS, caused by mutations in the superoxide dismutase 1, or SOD1, gene. Preclinical data suggesting promising safety and efficacy of gene therapy treatments for these disorders using NAV AAV9, generated by our Chief Scientific Officer, Dr. Brian Kaspar, has been licensed from NCH by the Company. We expect to move forward with initiating investigational new drug application, or IND, enabling studies in both Rett syndrome and ALS and plan to provide more details on these programs in the second half of 2017.
The preliminary prospectus supplement related to the Offering, dated June 19, 2017, includes the following information under the heading Risk FactorsRisks related to our recent business developments:
We must establish, to the FDAs satisfaction, that our proposed potency assay for AVXS-101 sufficiently characterizes the key product characteristics of our clinical and commercial product supply.
We recently held a Type B Chemistry, Manufacturing and Controls, or CMC, meeting with the United States Food and Drug Administration, or the FDA, to seek alignment with the FDA regarding our proposed Good Manufacturing Practice, or GMP, commercial manufacturing process for AVXS-101, which we are primarily conducting using our own manufacturing facility. Our proposed GMP manufacturing process incorporates a novel adherent cell culture approach, which differs from the Hyperstack approach utilized by Nationwide Childrens Hospital, or NCH, to manufacture the product used in the Phase 1 clinical trial of AVXS-101 for spinal muscular atrophy, or SMA, Type 1. In order to reliably and accurately characterize the dose of the product for our planned clinical trials and, if approved, commercial demand, we will need to be able to reliably and consistently assess the key characteristics of the product we manufacture. During the CMC meeting, we presented our AVXS-101 potency assay and qualification plans to the FDA. In response, the FDA has requested, among other things, that we complete the implementation of our potency assay qualification plans, including presenting the FDA with data from the appropriate production runs of AVXS-101, to enable the agency to assess the feasibility of our plans. We have already begun the work to address this request, and we expect to submit these data to the FDA in the August 2017 timeframe.
The outcome of our potency assay and qualification development, including the results of the analyses that we are conducting in response to the FDAs request, are not yet known. As a result, we cannot guarantee that the comprehensive data package that we generate from these production runs will be sufficient for the FDA to determine that our proposed potency assay or the product tested with this assay is acceptable. If, upon review of this data, the FDA does not determine that our proposed potency assay is acceptable, we may be required to conduct additional work to develop and validate an acceptable potency assay for AVXS-101 and/or manufacture additional qualification lots of AVXS-101, which would likely delay our planned clinical studies, including the U.S. pivotal clinical trial of AVXS-101 in SMA Type 1 and our planned Phase 1/2a clinical trial of AVXS-101 in SMA Type 2. Any such delays could have a material adverse effect on our business prospects.
Our transition from the NCH manufacturing process to our own manufacturing process, conducted at our own facility and at facilities of third party manufacturing partners, requires us to conduct a comprehensive comparability study, which may result in delays to the approval process for AVXS-101.
Our Phase 1 clinical trial was conducted with AVXS-101 manufactured by NCH that was produced using a traditional Hyperstack process utilizing ampicillin-resistant genetic markers for plasmid selection. We are in the process of transitioning the primary manufacturing of AVXS-101 to our own manufacturing facility, which uses a process based on a novel adherent cell culture approach that differs from the Hyperstack approach utilized by NCH, and utilizes globally compliant kanamycin-resistant genetic markers for plasmid selection. Our third party manufacturing partners will also use this process. We intend to use product that we manufacture using this new process for future clinical studies, including our planned U.S. pivotal trial of AVXS-101 in SMA Type 1, and, if AVXS-101 receives regulatory approval, to meet future commercial demand. We also intend to use AVXS-101 product that we manufacture for our planned Phase 1/2a clinical trial of AVXS-101 in SMA Type 2.
Because of the differences in these manufacturing processes, we are conducting a comprehensive comparability