Company: HURA
Filing Date: 2025-05-05
Form Type: 425
Source: 0000950170-25-063170
Chunk: 1

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-05
Form: 425
Chunk 1
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atic deep-seated tumors in the liver, lungs or retropertitoneum (abdomen). Up to 30% of patients with MCC present without primary lesions in the skin, so this trial will not only provide safety, feasibility, and efficacy data, but may also expand the potential number of addressable patients who may benefit from IFx-Hu2.0,” said James Bianco, M.D., President and Chief Executive Officer of TuHURA Biosciences.

“If feasibility and safety is demonstrated for IFx-Hu2.0 and Keytruda®when radiologically administered to deep-seated tumors, we plan to extend enrollment to a variety of non-MCC cancers that are known not to respond or respond poorly to CPIs. Since the underlying biology of

why tumors don’t respond to CPIs is for the most part the same, then the mechanism of how IFx-Hu2.0 overcomes that resistance to CPIs should be independent of the type of cancer treated. We have previously demonstrated that IFx-Hu2.0 can overcome CPI resistance in melanoma, squamous cell, and Merkel cell carcinoma, three unrelated types of skin cancers. If successful, this trial could expand the potential benefit of IFx-Hu2.0 to a wide variety of cancers,” added Dr. Bianco.

The Phase 1b/2a trial of IFx-Hu2.0 is a multicenter, open-label trial designed to assess the safety and feasibility of IFx-Hu2.0 as adjunctive therapy to pembrolizumab in adult patients with non-cutaneous MCC. The trial is designed to enroll a total of nine non-cutaneous MCC patients with either hepatic, pulmonary, or retroperitoneal lesions, enrolling three patients per lesion type (NCT06940440). Each patient will receive IFx-Hu2.0 (0.1 mg) injected into a single visceral tumor once a week for three weeks. Within 48 hours of the first IFx-Hu2.0 injection, patients will receive pembrolizumab, followed by pembrolizumab every three weeks for six months. The primary endpoint of the study is safety and feasibility of IFx-Hu2.0 adjuvant therapy evaluated 28 days following the last dose of IFx-Hu2.0, or Day 49 from the first IFx-Hu2.0 infusion. The study will also evaluate key secondary endpoints, including efficacy per RECIST 1