title: [Expression of PTEN mRNA in acute leukemia and its clinical significance].
abstract: OBJECTIVE
  To explore PTEN gene expression and its clinical significance in acute leukemia.
  
  
  METHODS
  The expression levels of PTEN mRNA in 5 leukemia cell lines, 87 patients with acute leukemias (AL), including 59 acute myeloid leukemia (AML), 26 acute lymphoblastic leukemia (ALL), and 2 acute hybrid leukemia, 21 AL in complete remission (AL-CR), 31 chronic myelogenous leukemia (CML) and 14 normal controls were assayed by RT-PCR.
  
  
  RESULTS
  PTEN mRNA was detected in K562 cell line, but not in Kasumi-1, HL-60, U937, Nalm-6 cell lines. The expression ratio of PTEN mRNA between CML (61.29%) and normal control (78.57%) had no statistical difference (P > 0.05). The expression ratios of PTEN mRNA in AL (18.39%) and AL-CR (42.86%) were significantly lower than that in normal control (P < 0.01 and P < 0.05, respectively), AL also has a lower expression ratio than that of AL-CR (P < 0.05). The decreased level of PTEN mRNA had a positive correlation with poor-prognostic factors (high white blood cell count of > or = 20 x 10(9)/L and chromosome abnormality).
  
  
  CONCLUSIONS
  There is down-regulated expression of PTEN gene in AL. PTEN gene may play a role in leukemogenesis.
authors.affiliation: State Key Laboratory of Experimental Hematology, Institute of Hematology, CAMS & PUMC, Tianjin, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Shen
authors.forename: Ze
authors.initials: Z
authors.lastname: Chen
authors.forename: Xu-Ping
authors.initials: XP
authors.lastname: Liu
authors.forename: Hai-Yan
authors.initials: HY
authors.lastname: Xing
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.forename: Jian-Xiang
authors.initials: JX
authors.lastname: Wang
mesh_terms: D045744:Cell Line, Tumor; D006801:Humans; D007938:Leukemia / Q000235:genetics / Q000378:metabolism*; D051059:PTEN Phosphohydrolase / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D012333:RNA, Messenger; D051059:PTEN Phosphohydrolase; C494929:PTEN protein, human