Abstract
Pediatric-inspired chemotherapy significantly improves survival for adolescent and adult patients with acute lymphoblastic leukemia (ALL). However, the benefits over allogeneic hematopoietic stem cell transplantation (allo-HSCT) remain unclear. To compare clinical outcomes between pediatric-inspired chemotherapy and allo-HSCT in consolidation therapy of adolescent and adult Philadelphia chromosome-negative (Ph-neg) ALL in first complete remission (CR1), related studies from MEDLINE, Embase, and Cochrane Controlled Register of Trials updated to July 2022 were searched. A total of 13 relevant trials including 3161 patients were included in the meta-analysis. Compared with allo-HSCT, pediatric-inspired chemotherapy achieved better OS (hazard risk (HR), 0.53; 95% confidence interval (CI), 0.41 to 0.68) and DFS (HR, 0.64; 95% CI, 0.48 to 0.86), with a significant reduction in NRM (risk ratio (RR), 0.30; 95% CI, 0.18 to 0.51), but no difference in the relapse rate (RR, 1.13; 95% CI, 0.93 to 1.39). When only studies based on intention-to-treat analysis were included, pediatric-inspired chemotherapy consistently conferred a survival advantage. In subgroup analyses, patients with baseline high-risk features demonstrated similar OS and DFS between pediatric-style chemotherapy and allo-HSCT, while pediatric-style chemotherapy had an OS and DFS advantage in standard-risk subgroup. Particularly, patients with positive minimal residual disease (MRD) achieved better OS and DFS if proceeded to allo-HSCT.
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Acknowledgements
We thank all authors of the studies included in this meta-analysis sincerely.
Funding
This work was supported by grants from the National Natural Science Foundation of China (81770106 and 82170206 to Hu) and Natural Science Foundation of Shanghai (20ZR1457100 to Libing Wang).
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Pan and Luxiang Wang reviewed the literature, analyzed the data, and wrote the paper. Fu and Jiang reviewed the literature and performed statistical analysis. Zhang and Chen performed statistical analysis. Chen, Libing Wang, and Hu proposed and designed the study, interpreted the results, wrote the manuscript, and oversaw the project. All authors reviewed, edited, and approved the final version of the manuscript.
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Qi Chen, Libing Wang, and Xiaoxia Hu are co-senior authors.
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Pan, Z., Wang, L., Fu, W. et al. Pediatric chemotherapy versus allo-HSCT for adolescent and adult Philadelphia chromosome-negative ALL in first complete remission: a meta-analysis. Ann Hematol 102, 1131–1140 (2023). https://doi.org/10.1007/s00277-023-05160-2
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DOI: https://doi.org/10.1007/s00277-023-05160-2