Incyte’s late PD-1 entrant Zynyz has chalked up a unique clinical win. Yet company CEO Hervé Hoppenot views the antibody molecule not necessarily as a major revenue driver but as an aide to the company’s oncology pipeline.
In a first-in-class win, Zynyz and chemotherapy slashed the risk of progression or death by 37% compared with chemo alone in patients with previously untreated, inoperable advanced squamous cell anal carcinoma (SCAC), according to results from the phase 3 POD1UM-303 trial presented at the annual European Society for Medical Oncology Congress (ESMO).
Patients in the Zynyz arm went a median 9.3 months without tumor progression versus 7.4 months for the control group.
Incyte plans to file Zynyz with the FDA by the end of the year in the indication, potentially making it the first PD-1 inhibitor approved for first-line anal cancer, Hoppenot said in an interview with Fierce Pharma.
Anal cancer is not a large oncology market from a financial perspective, Hoppenot acknowledged. Zynyz’s target patient population in the potential use has about 10,000 new diagnoses per year across the U.S. and Europe.
Even before an official FDA approval, some doctors have been using PD-1 inhibitors such as Merck & Co.’s Keytruda off label to treat anal cancer patients, Hoppenot explained. These uses aren’t always covered by insurance because of the absence of a regulatory approval.
Now, Incyte hopes Zynyz can fill that niche market. The company’s original bid to get Zynyz approved as a post-chemo second-line anal cancer treatment was rejected by the FDA in 2021 because of a low tumor response rate and some patient deaths unrelated to disease progression.
Besides the progression-free survival result in the POD1UM-303 trial, Zynyz has shown a preliminary trend toward improving patient survival. While the data are immature, Zynyz was linked to a 30% reduction in the risk of death, as patients who took the PD-1 agent survived a median 29.2 months versus 23 months for the control arm. Zynyz showed the advantage despite the trial allowing patients in the control arm to cross over to receive the PD-1 inhibitor after progression.
Given the effect size and statistical considerations, Hoppenot said he’s confident that Zynyz will show a statistically significant overall survival benefit at the final analysis, which he said is coming “very soon” next year.
The value of an in-house PD-1 drug
Zynyz entered the market last year with an FDA approval in Merkel cell carcinoma, another rare cancer type. In addition, Incyte announced a positive phase 3 trial, POD1UM-304, for Zynyz’s combination with chemo in first-line non-small cell lung cancer (NSCLC). But that indication faces some regulatory uncertainty given the trial’s comparator arm is chemotherapy alone, when Keytruda in combination with chemo is the current standard of care.
Incyte will speak with the FDA to discuss the drug’s best path forward in first-line NSCLC, and the company is prioritizing the anal cancer filing first, Hoppenot said.
Even if Zynyz eventually secures its first-line NSCLC nod, the drug’s market potential there seems limited given Keytruda’s dominance, and because the PD-1 king is nearing its patent cliff in 2028.
Still, Zynyz could provide Incyte some returns in the niche indications. But, more importantly, “we believe that the optionality value of being able to develop our other pipeline products in combination with [an] approved PD-1 is very valuable,” Hoppenot said.
Having an in-house PD-1 allows Incyte to test its novel agents in combinations without having to buy Keytruda, the CEO said. That translates into millions of dollars in savings and faster R&D timelines.
“It’s basically giving me strategic flexibility in a way that would be very difficult if I had to do it with another product,” Hoppenot said. “So, after approval, is it going to be used with biosimilar of Keytruda? I don’t really care.”
Oncology's place at Incyte
General oncology isn’t Incyte’s biggest business area. The company is best known for its Novartis-partnered myelofibrosis and graft-versus-host disease drug Jakafi, and that department just got bigger with the FDA approval for its Syndax-partnered CSF-1R antibody Niktimvo last month.
Investors are also focused on the launch of Incyte’s Opzelura cream in autoimmune skin conditions and potential phase 3 readouts for the JAK1 inhibitor povorcitinib, which is being developed in a broad range of inflammatory diseases.
In oncology beyond the bone marrow cancer myelofibrosis, Incyte in February gained full rights to CD19 antibody Monjuvi from former partner MorphoSys and in August announced a positive phase 3 readout in previously treated follicular lymphoma. At ESMO 2024, the company is also sharing for the first time early-phase data for its CDK2 inhibitor, INCB123667, in certain gynecological cancers.
Still, Hoppenot argued that the three business areas are essentially equal in their importance to the company. The key is optionality, the CEO said, so that success from one of the drugs could more than compensate for the expected decline of Jakafi, which faces its own patent cliff in 2028.
Incyte is interested in striking deals to access external innovations, having recently bought immunology biotech Escient Pharmaceuticals for $750 million. In oncology dealmaking, the company doesn’t have specific guardrails around tumor types but is more focused on whether the mechanism in question is unique, Hoppenot said.
Being realistic about the price of a first- or best-in-class drug in late-stage development, Hoppenot said Incyte is focusing on earlier-stage assets, especially around targets where the company has done some internal research.