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ASCO 2025 | Evaluating B7H3 as a target in castration-resistant prostate cancer

Andrew Ohyama Parsonson, FRACP, MBBS, comments on the rationale and potential of targeting B7H3 in cancer treatment. Its widespread expression on the surface of many cancer cells, particularly in castration-resistant prostate cancer, makes it an attractive target for therapeutic intervention. B7H3-targeting agents have shown effectiveness in various cancer types, including small cell lung cancer, hepatocellular carcinoma, and several other solid tumors. This interview took place during the 2025 American Society of Clinical Oncology (ASCO) Meeting in Chicago, IL.

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Transcript

So B7H3 is an immunomodulatory protein that’s expressed on the surface of many types of cancer cells and with castration-resistant prostate cancer in particular, B7H3 tends to be quite ubiquitous with an expression level of over 90% in most cells and so this made sense as a target for this particular agent and it’s also been an agent that’s been effective in many other cancer types, so particularly small cell lung cancer, hepatocellular carcinoma, and several other solid tumors...

So B7H3 is an immunomodulatory protein that’s expressed on the surface of many types of cancer cells and with castration-resistant prostate cancer in particular, B7H3 tends to be quite ubiquitous with an expression level of over 90% in most cells and so this made sense as a target for this particular agent and it’s also been an agent that’s been effective in many other cancer types, so particularly small cell lung cancer, hepatocellular carcinoma, and several other solid tumors.

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