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• W2892354038 abstract "10521 Background: Little is known about neurotoxic mechanisms associated with chemotherapy in children with ALL. Cerebrospinal fluid (CSF) biomarkers of brain injury may provide insight into this process. Methods: 235 patients (51% male; mean [SD] age diagnosed 6.8 [4.7] years) treated on a chemotherapy only protocol provided CSF samples following diagnosis and through consolidation. CSF was assayed for biomarkers of myelin degradation (myelin basic protein [MBP]), neuronal damage (nerve growth factor [NGF], total-Tau [T-Tau]) and astrogliosis (glial fibrillary acidic protein [GFAP]). Leukoencephalopathy was evaluated by brain MRI’s during therapy. At ≥5 years post-diagnosis, 138 (70%) of the 198 still eligible survivors (without relapse and unrelated neurologic injury) completed neurocognitive testing and brain diffusion tensor imaging of white matter integrity at age 13.6 [4.6] years. Log-binomial and general linear models were used to examine whether biomarker changes from baseline through consolidation were related to serum methotrexate exposure, acute leukoencephalopathy, and long-term brain outcomes. Results: NGF and T-Tau increased from baseline to consolidation ( P's < 0.001), while MBP and GFAP were elevated at baseline and remained so through consolidation. The number of intrathecal injections (methotrexate, hydrocortisone, cytarabine) was positively correlated with NGF increase at consolidation ( P= 0.005). Increases in GFAP (RR 1.2; 95% CI [1.0 – 1.4]), MBP (RR 1.1 [1.0 – 1.1]) and T-Tau (RR 1.8 [1.1 – 2.8]) were related to higher risk for acute leukoencephalopathy, and higher diffusivity in frontal lobe white matter at ≥5 years post-diagnosis ( P’s < 0.05). Increase in T-Tau at consolidation was associated with worse long-term sustained attention ( P= 0.03), and visual- ( P= 0.04) and visual-motor ( P= 0.02) processing speed. Conclusions: Glial injury, which is evident at diagnosis, may be related to leukemia and methotrexate exposure. Neuronal injury is associated with intrathecal chemotherapy and long-term neurocognitive and brain imaging outcomes. Monitoring CSF biomarkers may be useful in identifying individuals at risk for poor neurological outcomes." @default.
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• W2892354038 date "2017-05-20" @default.
• W2892354038 modified "2023-09-24" @default.
• W2892354038 title "Biomarkers of brain injury and neurologic outcomes in children treated with chemotherapy for acute lymphoblastic leukemia (ALL)." @default.
• W2892354038 doi "https://doi.org/10.1200/jco.2017.35.15_suppl.10521" @default.
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