title: [PCR detection of relevant translocations in pediatric acute lymphoblastic leukemia].
abstract: BACKGROUND
  In Mexico, leukemia represents the most common type of cancer in the population under 15 years old with a high incidence rate when compared with developed countries. The etiology of leukemia may be unknown, however different factors are involve such as chromosomal translocations. The aim of this work is to detect the molecular alterations: TEL-AML1, MLL-AF4, BCR-ABL minor and E2A-PBX1 in pediatric patients with acute lymphoblastic leukemia.
  
  
  METHODS
  91 bone marrow samples were collected from pediatric patients with acute lymphoblastic leukemia from january 2012 to march 2013 at the Pediatric Hematology Service, Hospital General "Gaudencio González Garza". Translocations detected (TEL-AML1, MLL-AF4, BCR-ABL minor and E2A-PBX1) using real time PCR, SYBR Green (Qiagen, Alameda, CA).
  
  
  RESULTS
  91 samples were processed, the detected frequencies for each translocation were: TEL-AML1 (7.21%), E2A-PBX1 (5.15%). The MLL-AF4 and the BCR-ABL minor translocations were not detected in this study.
  
  
  CONCLUSIONS
  The frequencies shown in this study are consistent with the data shown in the literature, where TEL-AML1 is the most common translocation found in pediatric patients. It is of relevance to mention that E2A-PBX1 is found in a high frequency in developing countries when compared with developed countries.
authors.affiliation: Unidad de Investigación Biomédica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional La Raza, Instituto Mexicano del Seguro Social, Ciudad de México, México. bekkermendez@yahoo.com.
authors.forename: Francisco Xavier
authors.initials: FX
authors.lastname: Guerra-Castillo
authors.forename: María Teresa
authors.initials: MT
authors.lastname: Ramos-Cervantes
authors.forename: Cecilia
authors.initials: C
authors.lastname: Rosel-Pech
authors.forename: Elva
authors.initials: E
authors.lastname: Jiménez-Hernández
authors.forename: Vilma Carolina
authors.initials: VC
authors.lastname: Bekker-Méndez
mesh_terms: D001856:Bone Marrow Examination; D002648:Child; D005819:Genetic Markers; D006801:Humans; D008800:Mexico; D016133:Polymerase Chain Reaction; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000235:genetics*; D014178:Translocation, Genetic
chemical_list: D005819:Genetic Markers
keywords: Bone marrow; Child; Leukemia; Neoplasms