%0 Journal Article %A Esmaili, Mohammad Ali %A Kazemi, Ahmad %A Zaker, Farhad %A Faranoush, Mohammad %A Rezvany, Mohammad Reza %T Effects of Reduced Mir-24 Expression on Plasma Methotrexate Levels, Therapy-Related Toxicities,and Patient Outcomes in Pediatric Acute Lymphoblastic Leukemia %J Reports of Biochemistry and Molecular Biology %V 8 %N 4 %U http://rbmb.net/article-1-378-en.html %R %D 2020 %K Acute Lymphoblastic Leukemia, Event Free Survival, Methotrexate, Mir, Toxicity, %X Background: The current study aims to investigate the relationship of miR-24 expression with plasma methotrexate (MTX) levels, therapy-related toxicities, and event-free survival (EFS) in Iranian pediatric acute lymphoblastic leukemia (ALL) patients. Methods: The study included 74 ALL patients in consolidation phase and 41 healthy children. RNA was extracted from plasma, polyadenylated, and reverse transcribed. miR-24 expression was determined by quantitative polymerase chain reaction (qPCR). Plasma MTX concentrations were measured by high performance liquid chromatography (HPLC) 48 h after high-dose methotrexate (HD-MTX) injection. The diagnosis of ALL was further subclassified as B-ALL or T-ALL via flow cytometry. Results: miR-24 expression was less in pediatric ALL patients than in the control group (p = 0.0038). Furthermore, downregulation of miR-24 was correlated with intermediate-to high-grade HD-MTX therapy toxicities (p = 0.025). Nevertheless, no statistically significant associations were seen between miR-24 levels and plasma MTX levels 48 h after HD-MTX administration (p > 0.05) or EFS in pediatric ALL patients (p > 0.05). Conclusions: miR-24 expression may contribute to interindividual variability in response to intermediate-to high-grade HD-MTX therapy toxicities under Berlin Frankfurt Munster (BFM) treatment. %> http://rbmb.net/article-1-378-en.pdf %P 358-365 %& 358 %! the relationship miR-24 with pediatric ALL %9 Original Article %L A-10-331-1 %+ Department of Hematology, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran,Iran. %G eng %@ 2322-3480 %[ 2020