TY - JOUR
T1 - Genome-wide identification of aberrantly methylated promoter associated CpG islands in acute lymphocytic leukemia
AU - Kuang, S. Q.
AU - Tong, W. G.
AU - Yang, H.
AU - Lin, W.
AU - Lee, M. K.
AU - Fang, Z. H.
AU - Wei, Y.
AU - Jelinek, J.
AU - Issa, J. P.
AU - Garcia-Manero, G.
N1 - Funding Information:
This work was supported by a Leukemia SPORE (P50CA100632) Career Development Award to S-Q K, and NCI grants CA100067 and CA105771, the Leukemia & Lymphoma Society of America and a MD Anderson Cancer Center’s Physician-Scientist Award from the Commonwealth Cancer Foundation for Research (all to G G-M).
PY - 2008
Y1 - 2008
N2 - We performed a genome-wide analysis of promoter associated CpG island methylation using methylated CpG island amplification (MCA) coupled to representational differential analysis (RDA) or a DNA promoter microarray in acute lymphoblastic leukemia (ALL). We identified 65 potential targets of methylation with the MCA/RDA approach, and 404 with the MCA/array. Thirty-six (77%) of the genes identified by MCA/RDA were shared by the MCA/array approach. Chromosomal location of these genes was evenly distributed in all autosomes. Functionally, 303 of these genes clustered in 18 molecular pathways. Of the 36 shared genes, 31 were validated and 26 were confirmed as being hypermethylated in leukemia cell lines. Expression analysis of eight of these genes was epigenetically modulated by hypomethylating agents and/or HDAC inhibitors in leukemia cell lines. Subsequently, DNA methylation of 15 of these genes (GIPC2, RSPO1, MAGI1, CAST1, ADCY5, HSPA4L, OCLN, EFNA5, MSX2, GFPT2, GNA14, SALL1, MYO5B, ZNF382 and MN1) was validated in primary ALL samples. Patients with methylation of multiple CpG islands had a worse overall survival. This is the largest published list of potential methylation target genes in human leukemia offering the possibility of performing rational unbiased methylation studies in ALL.
AB - We performed a genome-wide analysis of promoter associated CpG island methylation using methylated CpG island amplification (MCA) coupled to representational differential analysis (RDA) or a DNA promoter microarray in acute lymphoblastic leukemia (ALL). We identified 65 potential targets of methylation with the MCA/RDA approach, and 404 with the MCA/array. Thirty-six (77%) of the genes identified by MCA/RDA were shared by the MCA/array approach. Chromosomal location of these genes was evenly distributed in all autosomes. Functionally, 303 of these genes clustered in 18 molecular pathways. Of the 36 shared genes, 31 were validated and 26 were confirmed as being hypermethylated in leukemia cell lines. Expression analysis of eight of these genes was epigenetically modulated by hypomethylating agents and/or HDAC inhibitors in leukemia cell lines. Subsequently, DNA methylation of 15 of these genes (GIPC2, RSPO1, MAGI1, CAST1, ADCY5, HSPA4L, OCLN, EFNA5, MSX2, GFPT2, GNA14, SALL1, MYO5B, ZNF382 and MN1) was validated in primary ALL samples. Patients with methylation of multiple CpG islands had a worse overall survival. This is the largest published list of potential methylation target genes in human leukemia offering the possibility of performing rational unbiased methylation studies in ALL.
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U2 - 10.1038/leu.2008.130
DO - 10.1038/leu.2008.130
M3 - Article
C2 - 18528427
AN - SCOPUS:49449117541
SN - 0887-6924
VL - 22
SP - 1529
EP - 1538
JO - Leukemia
JF - Leukemia
IS - 8
ER -