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ASCO 2026 | APROMISS: catequentinib hydrochloride in alveolar soft part sarcoma

Margaret von Mehren, MD, Fox Chase Cancer Center, Philadelphia, PA, presents results from the APROMISS trial (NCT03016819) of catequentinib hydrochloride, an oral multitargeted receptor tyrosine kinase inhibitor (TKI), in patients with advanced alveolar soft part sarcoma (ASPS). Despite the objective response rate falling marginally below the predefined threshold, results demonstrated prolonged disease control, durable responses, and favorable progression-free and overall survival outcomes, alongside a manageable safety profile. This interview took place during the 2026 American Society of Clinical Oncology (ASCO) Meeting in Chicago, IL.

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Transcript

That study was looking at an ultra-rare tumor, alveolar soft-part sarcoma, and evaluating a drug that is a VEGF targeting agent. I think what we saw in that study, the study didn’t meet its defined endpoint, but we know that sort of that class of drugs has shown activity. A prior study using the same agent in a basket trial had a higher response rate. But in that study, they excluded patients who had had any prior VEGF therapy, whereas this current study did not...

That study was looking at an ultra-rare tumor, alveolar soft-part sarcoma, and evaluating a drug that is a VEGF targeting agent. I think what we saw in that study, the study didn’t meet its defined endpoint, but we know that sort of that class of drugs has shown activity. A prior study using the same agent in a basket trial had a higher response rate. But in that study, they excluded patients who had had any prior VEGF therapy, whereas this current study did not. And so part of the reason for maybe not seeing the response rate they may have wanted may be related to that. The other thing that the patient population was more male than female, although if you look at epidemiologic studies, it’s actually the other way around. And there is at least one study that is suggested that males may have a worse prognosis. And so maybe just the patient population altogether was one that was one more heavily treated and one that had a worse prognosis. Dr. Stacchiotti, who presented the study, did point out in the patients who had either VEGF therapy that their responses were lower than those who had not. So I think it’s an interesting drug. The safety in terms of the types of toxicities are really what we see with that class of drugs and overall pretty well tolerated. And so I think it adds to the support of this being a class of drugs to use in that disease. One of the things that we know about that disease also is that it can respond to immunotherapies. And so the question is, in studies that have combined both the VEGF TKI with immunotherapy, we see some of the highest responses with longest duration of benefit. And so would that approach with this drug do better? And so I think it’s not clear how the drug will move forward, particularly for that indication outside of China, but I think it’s showing what we anticipate and is useful from that perspective from the data.

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