title: Aberrant hypomethylation of SALL4 gene is associated with intermediate and poor karyotypes in acute myeloid leukemia.
abstract: OBJECTIVE
  SALL4 gene has been identified to stimulate the expansion of hematopoietic stem cell (HSCs) and enhance the self-renewal of HSCs. Overexpression of SALL4 has been found in several cancers. The present study was aimed to investigate the methylation status of SALL4 promoter region in acute myeloid leukemia (AML).
  
  
  METHODS
  The methylation status of SALL4 promoter was analyzed in 84 patients with AML using methylation-specific PCR (MSP) and its clinical significance was evaluated.
  
  
  RESULTS
  Aberrant hypomethylation of SALL4 gene, which was correlated with SALL4 expression, was found in 17.8% (15/84) cases. The patients with SALL4 hypomethylation had significantly older age and higher WBCs than those without SALL4 hypomethylation. The incidence of SALL4 hypomethylation was higher in M1 subtype than in M2 and other subtypes (50%, 26% and 6%, respectively, P=0.001). SALL4 hypomethylation was associated with cytogenetically intermediate and poor groups. Although survival time of the SALL4-hypomethylated AML was shorter than that of SALL4-methylated group (4 months vs 9 months), the difference was not statistically significant (P=0.356).
  
  
  CONCLUSIONS
  Hypomethylation of SALL4 promoter is a common event and is associated with the intermediate and poor karyotypes in AML.
authors.affiliation: Laboratory Center, Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, PR China.
authors.forename: Ji-chun
authors.initials: JC
authors.lastname: Ma
authors.forename: Jun
authors.initials: J
authors.lastname: Qian
authors.forename: Jiang
authors.initials: J
authors.lastname: Lin
authors.forename: Wei
authors.initials: W
authors.lastname: Qian
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.forename: Cui-zhu
authors.initials: CZ
authors.lastname: Wang
authors.forename: Hai-yan
authors.initials: HY
authors.lastname: Chai
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Chen
authors.forename: Zhen
authors.initials: Z
authors.lastname: Qian
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001483:Base Sequence; D016022:Case-Control Studies; D019175:DNA Methylation; D005260:Female; D015870:Gene Expression; D006801:Humans; D053208:Kaplan-Meier Estimate; D059785:Karyotype; D015470:Leukemia, Myeloid, Acute / Q000175:diagnosis / Q000235:genetics* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D011379:Prognosis; D017422:Sequence Analysis, DNA; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D055815:Young Adult
chemical_list: C472575:SALL4 protein, human; D014157:Transcription Factors