Article
作者: Banerjee, Rahul ; Shune, Leyla ; Khouri, Jack ; Gaballa, Mahmoud R. ; Rossi, Adriana ; Abid, Muhammad Bilal ; De Menezes Silva Corraes, Andre ; Janakiram, Murali ; Patel, Krina K. ; Grajales-Cruz, Ariel ; Pasvolsky, Oren ; Fogel, Lindsay ; Bal, Susan ; Harada, Ken ; Kaur, Gurbakhash ; Atrash, Shebli ; Anderson, Larry D. ; Richards, Tiffany ; Shain, Kenneth ; Sborov, Douglas W. ; Sannareddy, Aishwarya ; Richard, Shambavi ; Davis, James ; Green, Kimberly ; Biran, Noa ; Herr, Megan ; Hosoya, Hitomi ; De Avila, Gabriel ; Zanwar, Saurabh S. ; Ali, Hossam M. ; Lin, Yi ; Castaneda-Puglianini, Omar ; Rana, Masooma ; Mikkilineni, Lekha ; Ouchveridze, Evguenia ; Portuguese, Andrew J. ; Lee, Hans C. ; Ferreri, Christopher ; Goel, Utkarsh ; Ye, Jing Christine ; Dima, Danai ; Borogovac, Azra ; Sidana, Surbhi ; Zolotov, Eli ; Julian, Kelley ; Afrough, Aimaz ; Raza, Shahzad ; DeJarnette, Shaun ; Hansen, Doris K. ; Hassan, Hamza ; Voorhees, Peter M.
Abstract:Patients with plasma cell leukemia (PCL) are generally excluded from pivotal T-cell–redirecting bispecific antibody (BsAb) trials. We evaluated real-world outcomes in a multicenter retrospective study of 122 patients with primary or secondary PCL across 15 academic centers, categorized as active (≥5% circulating plasma cells within 30 days before BsAb initiation) or historical. Patients received teclistamab (37%), elranatamab (11%), talquetamab as a line of therapy (Tal LOT, 42%), or talquetamab as bridging to CAR T-cell therapy (Tal Bridge, 11%). Cytokine release syndrome was grade 1 to 2 in 56% and grade 3 to 4 in 4% of patients, whereas neurotoxicity was grade 1 to 2 in 16% and grade 3 to 4 in 5% of patients. The overall response rate was 55%, including 61% with Tal LOT, 58% with Tal Bridge, 46% with elranatamab, and 33% with teclistamab. With a median follow-up of 8.3 months, talquetamab demonstrated superior survival. Tal LOT showed a median progression-free survival (mPFS) of 5.5 months and a median overall survival (mOS) of 11.5 months, and both were unreached in the Tal Bridge cohort. In contrast, teclistamab and elranatamab showed a mPFS values of 1.2 and 1.6 months and mOS values of 8.1 and 3.6 months, respectively (P = .007, P = .023). In active PCL, Tal LOT achieved mPFS/mOS of 6.9/12.2 months vs 0.7/1.4 months with teclistamab and 1.0/3.1 months with elranatamab, respectively (P< .001, P = .002). Multivariable analysis associated active PCL with worse survival and Tal LOT with improved outcomes. BsAbs were well tolerated in PCL, with talquetamab showing superior outcomes compared with B-cell maturation antigen–directed BsAbs.