For third-line follicular lymphoma, where both CAR-T and bispecifics are approved, experts are leaning towards CAR-T. The long-term follow-up data for CAR-T suggests a potential for cure, making it a more compelling option for eligible patients despite logistical challenges.

Combining polatuzumab vedotin with bispecific antibodies appears particularly effective for patients with double-hit lymphoma. This is significant because these high-risk patients, who have poor prognoses, were notably excluded from pivotal trials like STAR GLOW, suggesting a potential new standard for this specific subgroup.

An exploratory strategy for DLBCL patients involves using ctDNA to detect minimal residual disease after CAR T-cell therapy. This allows for early intervention with bispecific antibodies when the disease burden is low, potentially preventing full clinical progression, a shift from reactive to proactive treatment.

In follicular lymphoma, the treatment goal is durable remission with manageable toxicity, not necessarily a cure. Therefore, clinicians frequently prefer using a bispecific antibody first, reserving the more complex and toxic CAR-T cell therapy for transformed disease or after a bispecific fails.

Unlike some targeted therapies that lead to antigen loss, treatment with the CD19-directed antibody tafasitamab does not appear to eliminate CD19 expression on lymphoma cells. This is a critical finding, as it preserves the target for subsequent potent therapies like CD19-directed CAR T-cells.

Not all CD20-targeting bispecifics can be combined with rituximab. Mosunetuzumab binds the same epitope, causing competition. However, glofitamab and epcoritamab bind different epitopes, allowing for logical and potentially synergistic combinations with rituximab-based regimens.

Using a BCMA bispecific antibody first can exhaust a patient's T-cells or cause tumors to lose the BCMA target, rendering a subsequent BCMA-targeted CAR-T therapy ineffective. The optimal sequence is CAR-T first, which preserves T-cell function and BCMA expression, leaving bispecifics as a viable later-line option.

An expert treating DLBCL states they no longer use bispecific antibodies as monotherapy. Combining them with partners like chemotherapy (GemOx) or ADCs (Polatuzumab) raises the complete response rate by 15-20%, offering a better chance of benefit for patients.

Emerging data reveals significant synergy when combining antibody-drug conjugates (ADCs) like polatuzumab vedotin with bispecific antibodies like glofitumab. These combinations show impressive results in relapsed/refractory non-Hodgkin lymphoma, signaling a major future direction for developing more potent therapies.