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SOHO 2026 | Balancing efficacy and toxicity risks when combining BTK and BCL2 inhibitors in patients with MCL

Yucai Wang, MD, PhD, Mayo Clinic, Rochester, MN, comments on balancing the efficacy benefits of combining BTK inhibitors with BCL2 inhibitors against increased toxicity risks in patients with mantle cell lymphoma (MCL). Dr Wang highlights promising efficacy data from the SYMPATICO trial (NCT03112174), noting that combining these agents may improve progression-free survival but also likely increases the risk of cytopenia and infection, requiring closer patient monitoring. This interview took place at the 14th Annual Meeting of the Society of Hematologic Oncology (SOHO 2026) in Houston, TX.

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Transcript

So BTK inhibitor in combination with the BCL2 inhibitor, such as venetoclax, are showing promise in increasing the complete response rate and progression-free survival. And those are looking very promising from the SYMPATICO trial. And there are newer generations of similar trials that are ongoing. Hopefully, it may show the same thing. These are suggesting that we are able to use a combination, but I have to clarify that as of now, we don’t have an approved regimen of this sort...

So BTK inhibitor in combination with the BCL2 inhibitor, such as venetoclax, are showing promise in increasing the complete response rate and progression-free survival. And those are looking very promising from the SYMPATICO trial. And there are newer generations of similar trials that are ongoing. Hopefully, it may show the same thing. These are suggesting that we are able to use a combination, but I have to clarify that as of now, we don’t have an approved regimen of this sort. But in terms of balancing the toxicity and the efficacy data, I think the efficacy in terms of PFS increases is very notable. So if approved, I would be very comfortable using that regimen. Even now in standard care practice, off-label use, we sometimes do use that just because of the added benefit of the two agents. If we use BCL2 inhibitor as a single agent after BTK inhibitor, the efficacy is typically limited. I think by combining them, we probably can get a longer PFS by using them sequentially. Now, the toxicity is real because if we use the two agents together, I think the cytopenia risk is higher. Consequentially, then you probably will deal with a higher risk of infection. So we have to monitor patients closely when we use the combination. But I think that managing toxicity will not really discourage me from using the combination for the appropriate patients.

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