Suma Krishnan
Analyst · Jefferies
Thank you, Christine, and good morning, everyone. I'm happy to share today's update on our progress. Thanks to the tireless commitment of our team, we are rapidly approaching 2 registrational study readouts in the front of the eye. These readouts have exciting implications both for the patients we aim to serve as well as our platform. Due to the rapid cell turnover and protein clearance, the front of the eye has historically been a difficult-to-shoot target with gene therapies and biologics. Our HSV-1 vectors, which we easily and repeatedly administered as an eye drop, are uniquely positioned to fill this treatment gap. In sentinel patient cases, repeat dosing of our vectors has been well tolerated and delivered profound clinical improvement, underscoring the therapeutic potential of our HSV-1-based approach. With our registrational programs for KB803 and KB801 nearing readouts, we are on the cusp of validating that potential. Our registrational IOLITE study evaluating KB803 in DEB patients was fully enrolled in April and is on track for a readout later this year. On success, we expect to move rapidly to BLA submission, leveraging the extensive CMC work already completed for VYJUVEK. Our registrational EMERALD-1 study evaluating KB801 in NK patients is also progressing well. We expect to complete enrollment before year-end. And given the short 8-week primary endpoint, we expect a readout soon thereafter. Our KB407 and KB111 programs are advancing on similar time lines to deliver clinical data this year and registrational study starts in 2027. Dosing is underway in our open-label single-arm study, evaluating the safety of repeat dose KB407 in patients with cystic fibrosis who are either ineligible or refractory to modulator therapy. We expect to enroll approximately 5 patients and report interim results before year-end. We are also working with the FDA, the Cystic Fibrosis Foundation and the CF Therapeutic Development Network Coordinating Center or TDN on our innovative registrational study design. We are making good progress on the details of our design and statistical analysis plan. We expect study design alignment later this year and registrational study start in 2027. Dosing is also underway in our open-label single-arm study evaluating the safety of repeat dose KB111 in patients with Hailey-Hailey disease. We expect to enroll approximately 7 patients and report interim results before year-end. We have completed development of our HHD assessment scale and validations are now underway. Altogether, we are on track to discuss our repeat dosing safety results, scale and study design with the FDA before the end of the year, again, enabling a registrational study start in 2027. We look forward to sharing clinical updates on both programs in the coming months as we work to deliver meaningful benefits to the tens of thousands of patients with untreated cystic fibrosis or Hailey-Hailey disease. In addition to our work in rare disease, we continue to advance our broader pipeline, which leverages the flexibility of HSV-1 to target more common diseases of the lung, skin and eye. The most advanced of these programs in our inhaled KB707 program for the treatment of non-small cell lung cancer or NSCLC. Inhaled KB707 is currently under investigation in our Phase I/II dose escalation and expansion study KYANITE-1. Last year, we disclosed the inhaled KB707, a monotherapy achieved 36% response rate in heavily treated late-line NSCLC patients. Inhaled KB707 was also generally well tolerated with a safety profile amenable to outpatient management. At ASCO this year, we provided a clinical update on our dose expansion cohort evaluating KB707 in combination with pembrolizumab. We again saw strong response in late-line NSCLC patients with an objective response rate of 31% and encouraging durability. Responses were achieved in a diverse array of tumor types, including those with driver mutation, squamous histology and low PD-L1 expression. The combination regimen was also well tolerated, a positive indicator for KB707 combination potential with checkpoint inhibitors and immunotherapies more broadly. We expect to complete enrollment in our final dose expansion cohort evaluating inhaled KB707 in combination with chemotherapy later this year. Once data from this cohort is available, we expect to have full information needed to finalize and initiate a registrational study in second-line NSCLC expected in 2027. We are also moving intratumoral KB707 forward. Building on early signals of efficacy in patients with basal cell carcinoma from our Phase I/II OPAL-1 study, we expanded the scope of OPAL-1 to evaluate intratumoral KB707 in patients with Gorlin syndrome. Gorlin syndrome is a rare genetic disease, which imposes a heavy burden on patients, dramatically increasing the risk of developing basal cell carcinomas. Patients with Gorlin syndrome can suffer from hundreds of BCCs over their lifetimes, requiring frequent and potential disfiguring surgeries. There is no specific therapy approved for Gorlin and as a result, there exists a clear and urgent need for a safe and effective therapy that reduces BCC burden for these patients. We have now enrolled 3 patients with Gorlin syndrome and expect to provide a clinical update on these patients as well as our development plan in Gorlin later this year. With multiple registrational study readouts and starts upcoming as well as growing momentum in our oncology pipeline, we are uniquely positioned to deliver transformational impact to patients. This is in addition to our ongoing work on alpha-1 antitrypsin lung disease, [indiscernible] and earlier-stage preclinical programs. We look forward to sharing many updates in the months ahead. With that, I'll hand the call over to Kate.