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Li-Ping Zhang 1 Article
Pediatric cancer
Effectiveness and Safety of Dabrafenib in the Treatment of 20 Chinese Children with BRAFV600E-Mutated Langerhans Cell Histiocytosis
Ying Yang, Dong Wang, Lei Cui, Hong-Hao Ma, Li Zhang, Hong-Yun Lian, Qing Zhang, Xiao-Xi Zhao, Li-Ping Zhang, Yun-Ze Zhao, Na Li, Tian-You Wang, Zhi-Gang Li, Rui Zhang
Cancer Res Treat. 2021;53(1):261-269.   Published online September 15, 2020
DOI: https://doi.org/10.4143/crt.2020.769
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
We sought to investigate the effectiveness and safety of dabrafenib in children with BRAFV600E-mutated Langerhans cell histiocytosis (LCH).
Materials and Methods
A retrospective analysis was performed on 20 children with BRAFV600E-mutated LCH who were treated with dabrafenib.
Results
The median age at which the patients started taking dabrafenib was 2.3 years old (range, 0.6 to 6.5 years). The ratio of boys to girls was 2.3:1. The median follow-up time was 30.8 months (range, 18.9 to 43.6 months). There were 14 patients (70%) in the risk organ (RO)+ group and six patients (30%) in the RO group. All patients were initially treated with traditional chemotherapy and then shifted to targeted therapy due to poor control of LCH or intolerance to chemotherapy. The overall objective response rate and the overall disease control rate were 65% and 75%, respectively. During treatment, circulating levels of cell-free BRAFV600E (cfBRAFV600E) became negative in 60% of the patients within a median period of 3.0 months (range, 1.0 to 9.0 months). Grade 2 or 3 adverse effects occurred in five patients.
Conclusion
Some children with BRAFV600E-mutated LCH may benefit from monotherapy with dabrafenib, especially high-risk patients with concomitant hemophagocytic lymphohistiocytosis and intolerance to chemotherapy. The safety of dabrafenib is notable. A prospective study with a larger sample size is required to determine the optimal dosage and treatment duration.

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