On July 27, 2026 Aptevo Therapeutics Inc. (NASDAQ:APVO), a clinical-stage biotechnology company developing novel multispecific immuno-oncology therapeutics, reported a new solid tumor strategy designed to fight cancer on multiple fronts. The Company has filed a patent application covering a proprietary Nectin-4 x PD-L1 dual-targeting backbone designed to strengthen Aptevo’s oncology pipeline, expand partnering opportunities and support multiple therapeutic approaches from a single platform-derived innovation.
Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:
Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing
Schedule Your 30 min Free Demo!
For Aptevo, the filing helps secure the engine behind that strategy. Instead of pursuing one product built for one use, the filing will protect a backbone that may be adapted into multiple cancer-fighting approaches. That gives Aptevo more ways to advance its own pipeline, expands opportunities to work with large pharmaceutical companies and brings new thinking to the challenges of treating solid tumors.
"This filing is about building value from our science and using it to create more ways to fight solid tumors," said Jeff Lamothe, President and Chief Executive Officer of Aptevo. "Aptevo has built a reusable targeting architecture that can generate multiple assets, support multiple therapeutic approaches and create multiple paths to value. For a focused biotech company, that matters. It gives us a powerful way to expand our pipeline, engage larger pharmaceutical companies and pursue difficult solid tumors with a strategy that is bigger than any single asset."
"What excites us scientifically is the versatility of this backbone," said Mary Janatpour, Ph.D., Chief Scientific Officer of Aptevo. "We designed it to recognize two important targets in solid tumors, Nectin-4 and PD-L1, and to give us a foundation we can build on in multiple ways. That means we can think beyond a single drug candidate and use the same core approach to support radiopharmaceuticals, T-cell engagers and other immune-modulating therapies. That kind of flexibility matters because it gives us more ways to address the complexity of difficult-to-treat solid tumors."
The Company notes that radiopharmaceutical therapy is one potential application of this strategy and an area of growing focus for Aptevo. Pairing tumor-targeting constructs with radioligands supports the development of new targeted radiopharmaceutical candidates designed to deliver treatment activity directly to tumors. The Nectin-4 x PD-L1 backbone may also support T-cell engagers and other immune-based therapies, giving Aptevo multiple ways to pursue solid tumors through tumor targeting, immune activation and payload delivery.
The approach is designed to help therapies find tumors more precisely and simultaneously enhance anti-tumor immunity. Nectin-4 is found on several solid tumors, and PD-L1 can be found both on tumor cells and immune-suppressing cells within the tumor. By targeting both, Aptevo aims to direct treatment activity more selectively where it is needed most, better avoiding normal tissues than single-targeted agents. In addition to enhanced tumor localization, targeting PD-L1 immune-suppressing cells will enhance anti-tumor immunity. From here, Aptevo can deepen anti-tumor efficacy by adding additional functional components.
The backbone also demonstrates how Aptevo’s ADAPTIR and ADAPTIR-FLEX platforms are used to build smarter, more flexible cancer therapies. Aptevo can adjust how each construct is designed and add different therapeutic components depending on the goal. In simple terms, the same targeting concept may be used to create different kinds of therapies for hard-to-treat solid tumors.
The filing strengthens Aptevo’s intellectual property portfolio and supports a focused, platform-driven strategy: use proprietary science to create multiple shots on goal, retain strategic control and open the door to collaborations that could accelerate development.
(Press release, Aptevo Therapeutics, JUL 27, 2026, View Source [SID1234669434])