Aging of preleukemic thymocytes drives CpG island hypermethylation in T-cell acute lymphoblastic leukemia [EPICseq_14TALL]
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ABSTRACT:
PROVIDER: PRJNA649430 | ENA |
REPOSITORIES: ENA
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Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155335 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155334 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155337 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155336 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155338 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155333 | GEO
Project description:Cancer cells display DNA hypermethylation at specific CpG islands in comparison to their normal healthy counterparts, but the mechanism that drives this so-called CpG island methylator phenotype (CIMP) remains poorly understood. Here, we show that CpG island methylation in human T-cell acute lymphoblastic leukemia (T-ALL) mainly occurs at promoters of PRC2 target genes that are not expressed in normal or malignant T-cells and which display a reciprocal association with H3K27me3 binding. In addition, we found that this aberrant methylation profile shows a strong correlation with the epigenetic age of the leukemic T cells and elucidate that a similar CpG island methylation signature is gradually established in aging pre-leukemic thymocytes from CD2-Lmo2 transgenic mice. Finally, we unexpectedly uncover that this age-related CpG island hypermethylation signature is completely resistant to the FDA-approved hypomethylating agent Decitabine. Altogether, our work demonstrates that DNA methylation reflects the epigenetic history of leukemic T cells and suggests that methylation-based subtypes of human T-ALL have followed a different trajectory towards T-cell transformation, possibly mediated by differences in the self-renewing capacity of the putative T-ALL cell-of-origin. Given that the concept of preleukemic thymocytes has only been reported in T-ALL mouse models so far, we here provide, for the first time, conceptual evidence that a pre-leukemic phase might also be involved in the pathogenesis of the human disease.
2020-09-24 | GSE155332 | GEO
Project description:Aging of preleukemic thymocytes drives CpG island hypermethylation in T-cell acute lymphoblastic leukemia
| PRJNA649423 | ENA
Project description:Aging of preleukemic thymocytes drives CpG island hypermethylation in T-cell acute lymphoblastic leukemia [ChIPmentation_TALL]
| PRJNA649428 | ENA
Project description:Aging of preleukemic thymocytes drives CpG island hypermethylation in T-cell acute lymphoblastic leukemia [EPICarray_109TALL]
| PRJNA649435 | ENA