title: Epigenetic dysregulation of the Jak/STAT pathway by frequent aberrant methylation of SHP1 but not SOCS1 in acute leukaemias.
abstract: SOCS1 and SHP1 are negative regulators of the Jak/STAT signalling pathway that is implicated in leukaemogenesis. We studied if aberrant methylation of SOCS1 and SHP1 might be involved in the pathogenesis and prognostication of acute leukaemias by methylation-specific polymerase chain reaction (MSP). At diagnosis, methylation of SHP1 occurred more frequently in acute myeloid leukaemia (AML) (n=26, 52%) than acute lymphoblastic leukaemia (ALL) (n=6, 24%) (p=0.02). Methylation of SOCS1 was absent in both AML and ALL patients. SHP1 methylation was not associated with specific clinicopathologic features and had no prognostic impact on AML patients. Frequent methylation of SHP1, but not SOCS1, may be important in the pathogenesis, but not prognosis, of acute leukaemias.
authors.affiliation: University Department of Medicine, Professorial Block, Queen Mary Hospital, Pokfulam Road, Hong Kong.
authors.forename: C S
authors.initials: CS
authors.lastname: Chim
authors.forename: A S Y
authors.initials: AS
authors.lastname: Wong
authors.forename: Y L
authors.initials: YL
authors.lastname: Kwong
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002352:Carrier Proteins / Q000378:metabolism*; D016022:Case-Control Studies; D019175:DNA Methylation; D004268:DNA-Binding Proteins / Q000378:metabolism; D044127:Epigenesis, Genetic; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D053613:Janus Kinase 1; D007938:Leukemia / Q000209:etiology* / Q000378:metabolism; D008297:Male; D008745:Methylation; D008875:Middle Aged; D011379:Prognosis; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases / Q000378:metabolism*; D011505:Protein-Tyrosine Kinases / Q000378:metabolism; D012097:Repressor Proteins / Q000378:metabolism*; D050794:STAT1 Transcription Factor; D015398:Signal Transduction / Q000235:genetics*; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins; D015534:Trans-Activators / Q000378:metabolism
chemical_list: D002352:Carrier Proteins; D004268:DNA-Binding Proteins; D047908:Intracellular Signaling Peptides and Proteins; D012097:Repressor Proteins; C108944:SOCS1 protein, human; D050794:STAT1 Transcription Factor; C494079:STAT1 protein, human; D000071222:Suppressor of Cytokine Signaling 1 Protein; D050826:Suppressor of Cytokine Signaling Proteins; D015534:Trans-Activators; D011505:Protein-Tyrosine Kinases; C507904:JAK1 protein, human; D053613:Janus Kinase 1; C509249:PTPN6 protein, human; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases