title: Oxidative changes in cerebral spinal fluid phosphatidylcholine during treatment for acute lymphoblastic leukemia.
abstract: Central nervous system (CNS) treatment contributes to improved long-term disease-free survival from childhood acute lymphoblastic leukemia (ALL) by significantly decreasing the rate of disease relapse. Methotrexate (MTX), a drug commonly used for CNS treatment, has been associated with cognitive and academic problems, white-matter changes, perfusion defects, and brain atrophy. This study investigated oxidative stress as a possible mechanism of chemotherapy induced CNS injury. Unoxidized and oxidized components of phosphatidylcholine (PC), the most prevalent phospholipid in CNS cellular membranes, were measured in cerebral spinal fluid (CSF) samples obtained from 21 children diagnosed with low (n = 7), standard (n= 7), or high (n= 7) risk ALL. Children with high-risk ALL received the most MTX, especially during the most intensive phase of treatment (consolidation). Phospholipids were extracted from CSF samples obtained at diagnosis and during the induction, consolidation, and continuation treatment phases. Unoxidized and oxidized PC were measured by normal phase high-performance liquid chromatography at 2 ultraviolet wavelengths (206 and 234 nm, respectively). Data were analyzed by 2-way repeated-measures analysis of variance. Results support the hypotheses that the highest levels of oxidized PC would be observed during the most intensive phase of ALL therapy and in the high-risk ALL group. Findings provide preliminary evidence for chemotherapy-induced oxidative stress in CNS membrane phospholipids.
authors.affiliation: College of Nursing, University of Arizona, Tucson, AZ 85721-0203, USA.
authors.forename: Petra
authors.initials: P
authors.lastname: Miketova
authors.forename: Kris
authors.initials: K
authors.lastname: Kaemingk
authors.forename: Marilyn
authors.initials: M
authors.lastname: Hockenberry
authors.forename: Alice
authors.initials: A
authors.lastname: Pasvogel
authors.forename: John
authors.initials: J
authors.lastname: Hutter
authors.forename: Kevin
authors.initials: K
authors.lastname: Krull
authors.forename: Ida M
authors.initials: IM
authors.lastname: Moore
mesh_terms: D000293:Adolescent; D000964:Antimetabolites, Antineoplastic / Q000008:administration & dosage / Q000009:adverse effects*; D002648:Child; D002675:Child, Preschool; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D007278:Injections, Spinal; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage / Q000009:adverse effects*; D018384:Oxidative Stress / Q000187:drug effects; D010713:Phosphatidylcholines / Q000134:cerebrospinal fluid*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000134:cerebrospinal fluid* / Q000188:drug therapy* / Q000401:mortality
chemical_list: D000964:Antimetabolites, Antineoplastic; D010713:Phosphatidylcholines; D008727:Methotrexate