Xspray Pharma’s product portfolio is continuously evolving and, to date, has three announced product candidates based on the company’s HyNap platform: Dasynoc™ (HyNap-Dasa), HyNap-Nilo and HyNap-Sora. These are improved, amorphous versions of established and marketed protein kinase inhibitors with orphan drug status. The original drugs have secondary patents expiring between 2026 and 2029 and their total annual sales for 2020 exceeded USD 2.3 billion in the US market and USD 4.8 billion globally. After the end of the reporting period the company has decided to terminate further development of the generic version of dasatinib, that has been developed in parallel with Dasynoc™.
New projects will focus on the same indications as Dasynoc™ and HyNap-Nilo as well as on other cancer indications. The development processes created with Dasynoc™ and HyNap-Nilo will be applicable to the new projects allowing to significantly reduce development timelines.
Xspray Pharma has developed an improved version of dasatinib, Dasynoc™, for the treatment of chronic myeloid leukemia (CML) and acute lymphoblastic leukemia (ALL). Dasynoc™ has achieved bioequivalence with a 30 percent lower dose compared to the original drug, Sprycel®. The study confirms that Dasynoc™:
• is unaffected by the pH value of the stomach and can thus be used together with omeprazole without affecting the absorption of dasatinib, which facilitates treatment of peptic ulcers while the patient is being treated for cancer
• yields a more even and consistent uptake of dasatinib in the body without those cases of low uptake that are linked to the reference product
• can be administered at a lower dosage than the reference product, which is expected to yield fewer side effects
The market value for Dasynoc™ is high both during and after the end of the patent window. An application for US market approval for DasynocTM was submitted to FDA under the 505(b)(2) NDA regulatory procedure, November 2021.
The primary patent for the original drug expired in December 2020 and the secondary patent expires in 2026, which could give Dasynoc™ a favorable market establishment over several years with limited competition. In 2020, the global market for Sprycel® amounted to approximately USD 2.1 billion, of which the US market accounted for approximately USD 1.3 billion.
Xspray Pharma is developing HyNap-Nilo as an improved version of Tasigna® (nilotinib) for the treatment of chronic myeloid leukemia (CML). Global sales of Tasigna® totaled USD 1,958 million in 2020, of which the US market accounted for USD 859 million.
Tasignas drug substance patent expires in January 2024, and the secondary patent in February 2029. Xspray Pharma has conducted a clinical trial that investigated the pharmacokinetic properties, and food interaction effects of a HyNap-Nilo prototype. The study showed that HyNap-Nilo significantly reduces food interaction compared with Tasigna® after a high-fat meal. Studies have also shown significantly higher bioavailability of HyNap-Nilo compared with Tasigna®. Development is progressing, with the target of conducting bioavailability studies that, in the event of positive findings, will form the basis of the application for market approval under the 505(b)(2) NDA procedure.
The US Food and Drug Administration has granted orphan drug status to HyNap-Nilo for the treatment of chronic myeloid leukemia (CML), in view of the fact that HyNap-Nilo addresses the food interaction that is included in the warning text for Tasigna® in the US.
The development of the commercial formulation is complete, and manufacturing of clinical trial materials is under way ahead of clinical studies that are planned for 2022.
Xspray Pharma has developed HyNap-Sora as an improved version of Nexavar® (sorafenib) for the treatment of renal cancer and liver cancer as well as several forms of thyroid cancer. Global sales of Nexavar® in 2020 totaled USD 729 million, of which the US market accounted for USD 194 million. Nexavars primary drug substance patent expired in January 2020, and the secondary patent in the US expires in September 2028. A pharmacokinetic study in 14 healthy subjects was conducted with HyNap-Sora 100 mg against Nexavar® 200 mg. The study showed that the bioavailability of HyNap-Sora was nearly double that of Nexavar®. The variability in both AUC and Cmax among subjects was also reduced by approximately half.
Xspray Pharma is holding off on the development of HyNap-Sora in favor of other product candidates in its product portfolio that show a higher market value.