Christal M. Mickle
Analyst
Thank you, Tamara, and good afternoon, everyone. The rebrand of our company as Zevra during the first quarter was the culmination of a series of strategic moves over the past 2 years to refocus the company toward rare disease therapeutics. The acquisition of arimoclomol in 2022 was a key element of the strategic growth of our company as this program complemented our in-house development program, KP1077, for the treatment of rare sleep disorder known as idiopathic hypersomnia.
Our long-term strategy has been designed to build upon our expertise in drug development, which is now focused on rare disease, with the goal of commercializing our products in the U.S. using a small best-in-class commercial team. As we prepare for resubmission of the arimoclomol NDA, we are also in the process of building the commercial capabilities that will allow Zevra to bring a much needed therapy to patients with Niemann-Pick disease type C, also known as NPC. We believe our successful execution of this strategy has the potential to create meaningful long-term value for shareholders.
So why Zevra? Our new name is Greek for zebra, which is the internationally-recognized symbol of the rare disease community. We honor the many stripes of rare disease that are reflected in our new branding, and we embrace our name as a direct commitment to the rare disease community. To that end, we recently joined the Corporate Council of the National Organization for Rare Disease, also known as NORD.
Beyond our name, we have established a rare and unique position for Zevra in the biotech marketplace as a development-stage company with a growing revenue stream that reinforces our already strong financial position. Collectively, we believe that our strategy, our team, our strong financial foundation and our diverse portfolio of multiple clinical programs combine to enable us to deliver value to shareholders in 2023 and beyond.
Importantly, we have a fully engaged and supportive Board of Directors that is positioned to help us advance our company's mission of addressing the unique unmet needs of people with rare diseases. Zevra's new direction capitalizes on our strength and our financial position, enabling us to retain the value of our hard-earned approvals and control our commercial destiny while delivering much-needed therapies to patients with limited or no treatment options.
As part of our ongoing efforts to build and strengthen our team to execute our rare disease strategy, we announced that Sven Guenther was promoted to Chief Scientific Officer during the first quarter. Sven continues to lead the Zevra's research team and leverages his impressive background in drug development and clinical research to advance our programs.
In addition, Josh Schafer was added to our leadership team as our Chief Commercial Officer and Executive Vice President of Business Development. His expertise and leadership will be invaluable as we grow our commercial team. Finally, Travis Mickle continues to be fully engaged as a scientific consultant, and he is laser-focused on the arimoclomol resubmission.
Shifting to our financial results. We ended the first quarter in a strong position, with cash, cash equivalents and investments of $95.3 million as of March 31. Based on our current operating forecast, our available capital is expected to extend our cash runway into 2026, placing Zevra in a fortunate position compared to many other biotech companies in today's volatile capital markets.
As Tamara stated, the entire organization remains fully committed to our rare disease strategy, and we are focused on continuing to partner with key opinion leaders, patients, families and advocacy groups to ensure that our therapeutic approaches are answering their biggest quality of life and disease management concerns while ensuring that our products are relevant and capable of commercial success.
The first quarter of 2023 in recent months were significant for Zevra in its pipeline with new positive progress for both development programs. We'll first focus on arimoclomol. Arimoclomol is our early administered product candidate for NPC. It has been extensively studied in multiple clinical trials from Phase I to Phase III. Currently, arimoclomol has been granted Orphan Drug Designation for NPC in both the United States and the European Union, and Fast-Track Designation, Breakthrough Therapy Designation and Rare Pediatric Disease Designation from the FDA. If approved in the U.S., arimoclomol would also be eligible to receive a Pediatric Priority Review Voucher.
Zevra continues to advance arimoclomol towards the resubmission of its New Drug Application to the FDA as early as the third quarter of this year. The long-term goal for arimoclomol is that once approved, Zevra plans to commercialize the product ourselves, retaining the full market value for our shareholders. With a small and nimble commercial team, we believe we can fully serve the specialists and medical centers treating the NPC patient population with low commercial costs. Building upon our U.S. and EU early access programs as well as our relationships within the NPC community, we believe we have a strong foundation to help support the adoption of arimoclomol. Beyond our immediate focus on a successful U.S. commercial launch, we also see commercial potential for arimoclomol outside the U.S., including the EU and other potential geographies.
Now let's turn our attention to KP1077, our lead program for rare sleep disorders. I'll begin with an update on our idiopathic hypersomnia indication and finish with our narcolepsy indication. Due to limited treatment options for idiopathic hypersomnia, also known as IH, and its small and underserved community of approximately 37,000 patients seeking treatment in the U.S., KP1077 has been designated by the FDA as an Orphan Drug and is potentially eligible for expedited approval pathways. KP1077 could potentially provide clinical and safety benefits that will help differentiate it from current and future IH products.
The KP1077 Phase II study is actively enrolling subjects at more than 30 sites in the U.S. Interim Phase II efficacy and safety data is expected as early as Q3 2023, with potential for top line data as early as year-end. We expect the interim data from this trial will support the advancement of KP1077 into a pivotal Phase III study in IH. Importantly, the interim data will include information from an open-label titration phase, which we believe will help us in designing the Phase III study.
At the end of last quarter, Zevra submitted an Investigational New Drug application, or IND, to the FDA for narcolepsy. Thereafter, the FDA informed Zevra we may proceed under our newly opened IND, indicating we can initiate our clinical program for KP1077 in narcolepsy, extending the potential of the KP1077 program further across the spectrum of sleep disorders. Phase I studies will be conducted to support our clinical data package in both narcolepsy and IH. In addition, the KP1077 phase II study in IH could support the determination of whether to initiate a Phase III trial in narcolepsy in the future.
Now LaDuane will provide more details about our first quarter 2023 financial results.