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Suppressor of cytokine signalling‐1 gene silencing in acute myeloid leukaemia and human haematopoietic cell lines

Suppressor of cytokine signalling‐1 gene silencing in acute myeloid leukaemia and human... The aim of this study was to investigate whether the suppressor of cytokine signalling (SOCS)‐1 can act as a tumour suppressor when functioning as a negative regulator of the Janus family tyrosine kinases (JAKs), which have been reported to play important roles in leukaemogenesis. For this purpose, we carried out molecular analysis of the SOCS‐1 gene in human acute myeloid leukaemia (AML) and human haematopoietic cell lines. Sequencing alterations in the coding region were found in two of 90 primary AML samples and one of 17 cell lines. Hypermethylation of the SOCS‐1 gene was also observed in 72% of primary cases and 52% of cell lines and aberrant methylation strongly correlated with reduced expression. Transfection of SOCS‐1 into Jurkat cells harbouring the mutation and methylation suppressed cell growth at a low serum concentration. These findings indicate that SOCS‐1 is frequently silenced in haematopoietic malignancies, mainly as a result of hypermethylation, and suggest that SOCS‐1 may be able to function as a tumour suppressor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png British Journal of Haematology Wiley

Suppressor of cytokine signalling‐1 gene silencing in acute myeloid leukaemia and human haematopoietic cell lines

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References (49)

Publisher
Wiley
Copyright
Copyright © 2004 Wiley Subscription Services
ISSN
0007-1048
eISSN
1365-2141
DOI
10.1111/j.1365-2141.2004.05107.x
pmid
15327527
Publisher site
See Article on Publisher Site

Abstract

The aim of this study was to investigate whether the suppressor of cytokine signalling (SOCS)‐1 can act as a tumour suppressor when functioning as a negative regulator of the Janus family tyrosine kinases (JAKs), which have been reported to play important roles in leukaemogenesis. For this purpose, we carried out molecular analysis of the SOCS‐1 gene in human acute myeloid leukaemia (AML) and human haematopoietic cell lines. Sequencing alterations in the coding region were found in two of 90 primary AML samples and one of 17 cell lines. Hypermethylation of the SOCS‐1 gene was also observed in 72% of primary cases and 52% of cell lines and aberrant methylation strongly correlated with reduced expression. Transfection of SOCS‐1 into Jurkat cells harbouring the mutation and methylation suppressed cell growth at a low serum concentration. These findings indicate that SOCS‐1 is frequently silenced in haematopoietic malignancies, mainly as a result of hypermethylation, and suggest that SOCS‐1 may be able to function as a tumour suppressor.

Journal

British Journal of Haematology – Wiley

Published: Jan 1, 2004

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