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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: Untargeted adductomics of newborn dried blood spots identifies modifications to human serum albumin associated with childhood leukemia.

Authors: Yano, Yukiko; Schiffman, Courtney; Grigoryan, Hasmik; Hayes, Josie; Edmands, William; Petrick, Lauren; Whitehead, Todd; Metayer, Catherine; Dudoit, Sandrine; Rappaport, Stephen

Published In Leuk Res, (2020 Jan)

Abstract: The developing fetus is exposed to chemicals, which are metabolized to electrophiles that form adducts with nucleophilic Cys34 of human serum albumin (HSA). By measuring these adducts in neonatal blood spots (NBS), we obtain information regarding fetal exposures during the last month of gestation. To discover potential risk factors for childhood leukemia resulting from in utero exposures, we used untargeted adductomics to measure HSA-Cys34 adducts in 782 archived NBS, collected from incident cases of childhood acute lymphoblastic leukemia (ALL) or acute myeloid leukemia (AML) and matched population-based controls. Among a total of 28 Cys34 modifications that were measured, we found no differences in adduct abundances between childhood leukemia cases and controls overall. However, cases of T-cell ALL had higher abundances of adducts of reactive carbonyl species and a Cys34 disulfide of homocysteine was present at lower levels in AML cases. These results suggest that oxidative stress and lipid peroxidation may be etiologic factors of T-cell ALL, and alterations in one-carbon metabolism and epigenetic changes may be predictors of AML. Future replication of the results with larger sample sizes is necessary.

PubMed ID: 31760269 Exiting the NIEHS site

MeSH Terms: Adolescent; Age of Onset; Case-Control Studies; Child; Child, Preschool; Chromatography, High Pressure Liquid; Dried Blood Spot Testing*/methods; Female; Humans; Infant; Infant, Newborn; Leukemia/blood; Leukemia/diagnosis*; Leukemia/epidemiology; Lipid Peroxidation; Male; Neonatal Screening/methods*; Oxidative Stress/physiology; Protein Processing, Post-Translational; Proteomics/methods*; Reactive Oxygen Species/analysis*; Reactive Oxygen Species/blood; Serum Albumin, Human/analysis*; Serum Albumin, Human/metabolism

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