Methylation status of the SOCS 1 and JUNB genes in chronic myeloid leukemia patients
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Data
2009-01-01
Autores
Pena, Márcia Cristina R. [UNESP]
Pardini, Maria Ines de Moura Campos [UNESP]
Colturato, Virgilio A. R.
Pinheiro, Nídia A. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea
Resumo
Alteração no padrão de metilação gênica pode contribuir para a progressão da leucemia mielóide crônica (LMC). Neste estudo, o padrão de metilação no exon 2 do gene SOCS- 1 e região promotora de ambos SOCS- 1 e JUNB foram avaliadas em pacientes com LMC. O padrão de metilação desses genes foi analisado usando a técnicamethylation- specific polymerase chain reaction (MSP) em 30 amostras de pacientes com LMC, 30 amostras desses mesmos pacientes após transplante de medula óssea (TMO) e 30 amostras controle de indivíduos saudáveis. As amostras de pacientes com LMC apresentaram o seguinte padrão de metilação: gene JUNB (3.3%), região promotora do gene SOCS- 1 (6.6%) e exon2 do gene SOCS- 1 (46.6%). Amostras dos indivíduos saudáveis apresentaram metilação somente no exon 2 do gene SOCS- 1 (10%, P = 0.002). Após o transplante, os pacientes apresentaram alterações no padrão de metilação da região promotora do gene SOCS- 1 (6.6%), no exon2 do gene SOCS- 1 (46.6%) e na região promotora do gene JUNB (16.6%). Metilação das regiões promotoras dos genes SOCS- 1 e JUNB não é um evento frequente em LMC. em contraste, metilação no exon 2 do gene SOCS- 1 apresenta- se como um evento frequente, suscetível a alterações no padrão de metilação após TMO.
Alterations in the methylation status of genes may contribute to the progression of Chronic Myeloid Leukemia (CML). In this study, the methylation status in exon2 of SOCS- 1 and promoter regions of both SOCS- 1 and JUNB were evaluated in CML patients. The methylation status of these genes was analyzed using methylation- specific Polymerase Chain Reaction (MSP) in 30 samples from CML patients, 30 samples from these same patients after hematopoietic stem cell transplantation (HSCT) and 30 samples from healthy controls. The samples of CML patients presented methylation as follows: JUNB gene (3.3%), promoter region of the SOCS- 1 gene (6.6%) and exon2 of the SOCS- 1 gene (46.6%). The samples of the healthy individuals presented methylation (10%, P = 0.002) only in exon 2 of the SOCS- 1 gene. After transplantation, patients presented alterations in the methylation status of the promoter region of the SOCS- 1 gene (6.6%), exon2 of SOCS- 1 (46.6%) and the promoter region of the JUNB gene (16.6%). Methylation of the promoter regions of the SOCS- 1 gene and the JUNB gene is not a frequent event in CML. In contrast, SOCS- 1 gene methylation in exon2 is a frequent event, susceptible to alterations in status after HSCT with possible implications for the progression of this disease.
Alterations in the methylation status of genes may contribute to the progression of Chronic Myeloid Leukemia (CML). In this study, the methylation status in exon2 of SOCS- 1 and promoter regions of both SOCS- 1 and JUNB were evaluated in CML patients. The methylation status of these genes was analyzed using methylation- specific Polymerase Chain Reaction (MSP) in 30 samples from CML patients, 30 samples from these same patients after hematopoietic stem cell transplantation (HSCT) and 30 samples from healthy controls. The samples of CML patients presented methylation as follows: JUNB gene (3.3%), promoter region of the SOCS- 1 gene (6.6%) and exon2 of the SOCS- 1 gene (46.6%). The samples of the healthy individuals presented methylation (10%, P = 0.002) only in exon 2 of the SOCS- 1 gene. After transplantation, patients presented alterations in the methylation status of the promoter region of the SOCS- 1 gene (6.6%), exon2 of SOCS- 1 (46.6%) and the promoter region of the JUNB gene (16.6%). Methylation of the promoter regions of the SOCS- 1 gene and the JUNB gene is not a frequent event in CML. In contrast, SOCS- 1 gene methylation in exon2 is a frequent event, susceptible to alterations in status after HSCT with possible implications for the progression of this disease.
Descrição
Palavras-chave
Leucemia mieloide crônica, metilação, MSP- PCR, SOCS- 1, JUNB, Chronic myeloid leukemia, methylation, MSP- PCR, SOCS- 1, JUNB
Como citar
Revista Brasileira de Hematologia e Hemoterapia. Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea, v. 31, n. 3, p. 147-152, 2009.