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Palau A, Segerberg F, Lidschreiber M, Lidschreiber K, Naughton AJ, Needhamsen M, Jung LA, Jagodic M, Cramer P, Lehmann S, Carlsten M, Lennartsson A. Perturbed epigenetic transcriptional regulation in AML with IDH mutations causes increased susceptibility to NK cells. Leukemia 2023; 37:1830-1841. [PMID: 37495775 PMCID: PMC10457197 DOI: 10.1038/s41375-023-01972-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/05/2023] [Accepted: 07/10/2023] [Indexed: 07/28/2023]
Abstract
Isocitrate dehydrogenase (IDH) mutations are found in 20% of acute myeloid leukemia (AML) patients. However, only 30-40% of the patients respond to IDH inhibitors (IDHi). We aimed to identify a molecular vulnerability to tailor novel therapies for AML patients with IDH mutations. We characterized the transcriptional and epigenetic landscape with the IDH2i AG-221, using an IDH2 mutated AML cell line model and AML patient cohorts, and discovered a perturbed transcriptional regulatory network involving myeloid transcription factors that were partly restored after AG-221 treatment. In addition, hypermethylation of the HLA cluster caused a down-regulation of HLA class I genes, triggering an enhanced natural killer (NK) cell activation and an increased susceptibility to NK cell-mediated responses. Finally, analyses of DNA methylation data from IDHi-treated patients showed that non-responders still harbored hypermethylation in HLA class I genes. In conclusion, this study provides new insights suggesting that IDH mutated AML is particularly sensitive to NK cell-based personalized immunotherapy.
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Affiliation(s)
- Anna Palau
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Filip Segerberg
- Center for Hematology and Regenerative Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Michael Lidschreiber
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
- Department of Molecular Biology, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Katja Lidschreiber
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Aonghus J Naughton
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Maria Needhamsen
- Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, Solna, Sweden
| | - Lisa Anna Jung
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Maja Jagodic
- Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, Solna, Sweden
| | - Patrick Cramer
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
- Department of Molecular Biology, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Sören Lehmann
- Center for Hematology and Regenerative Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden.
- Hematology Centre, Karolinska University Hospital, Stockholm, Sweden.
- Hematology Unit, Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
| | - Mattias Carlsten
- Center for Hematology and Regenerative Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden.
- Center for Cell Therapy and Allogeneic Stem Cell Transplantation, Karolinska Comprehensive Cancer Center, Karolinska University Hospital, Stockholm, Sweden.
| | - Andreas Lennartsson
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
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Prenatal notch1 receptor blockade by protein delta homolog 1 (DLK1) modulates adipocyte size in vivo. Int J Obes (Lond) 2015; 40:698-705. [PMID: 26499442 DOI: 10.1038/ijo.2015.227] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/12/2015] [Accepted: 10/01/2015] [Indexed: 12/21/2022]
Abstract
INTRODUCTION/OBJECTIVES The protein delta homolog 1 (DLK1) has been reported to have an important role as inhibitor of adipogenesis. Understanding its mode of action can be a promising approach to cope with the formation of obesity. However, data on DLK1 signaling are not consistent, and especially its role as negative regulator of Notch receptors is discussed controversially. METHODS DLK1 effects have been investigated in differentiated 3T3-L1 cells by Adipokine Profiler Array, enzyme-linked immunosorbent assay and quantitative real-time PCR (qRT-PCR). In vivo effects of DLK1 on adipogenesis have been studied by the DLK1 treatment of pregnant C57BL/6NTac mice and the phenotypical characterization of the offspring fed on chow or high-fat diet (HFD). Furthermore, gene expression of key adipogenesis genes in adipose tissue (AT) samples was observed by qRT-PCR. RESULTS In 3T3-L1 cells, DLK1 was found to be an inhibitor of Notch1 signaling. Gene expression of Notch1 and Hes1 was lowered by 53% and 65%, respectively, and the expression of protein target PAI-1 was decreased by 51%. The offspring of DLK1-treated pregnant mice were fed chow or HFD starting from week 4. At week 18, a larger proportion of visceral AT was determined on HFD after DLK1 treatment (P=0.011), whereas adipocyte size was reduced (P=0.007 for maximal size). This was affiliated to an upregulation of adipocyte differentiation. The underlying mechanism was found in an increased expression of the Notch1 receptor gene and protein in AT of the offsprings independently of the diet. However, feeding a chow diet resulted in a decreased expression of Notch1 target genes Hes1 and RBP-Jκ, whereas under HFD these genes were upregulated. CONCLUSIONS Treatment of mice with recombinant human DLK1 during pregnancy has significant effects on AT of the offspring. This can be associated with counter-regulatory changes in the Notch1 signaling cascade.
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Kilian TM, Beck-Sickinger AG. Recombinant expression and characterization of biologically active protein delta homolog 1. Protein Expr Purif 2015; 110:72-8. [DOI: 10.1016/j.pep.2015.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 02/07/2015] [Accepted: 02/09/2015] [Indexed: 10/24/2022]
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Li H, Cui ML, Chen TY, Xie HY, Cui Y, Tu H, Chen FH, Ge C, Li JJ. Serum DLK1 is a potential prognostic biomarker in patients with hepatocellular carcinoma. Tumour Biol 2015; 36:8399-404. [PMID: 26018510 DOI: 10.1007/s13277-015-3607-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 05/22/2015] [Indexed: 12/31/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the sixth most prevalent cancer and the third most frequent cause of cancer-related death in developing countries, especially in East Asia and South Africa, and the identification of new biomarkers for early diagnosis and prognosis is needed. Delta-like 1 homologue (Drosophila) (DLK1) is expressed in malignancies and promotes cancer cell stemness and tumourigenicity, which makes this molecule a potential target for therapies directed against cancer stem/progenitor cells. Here, we aimed to assess the predictive value of DLK1 as a diagnostic and prognostic biomarker in HCC. With this purpose, serum DLK1 levels were detected using an enzyme-linked immunosorbent assay (ELISA) in serum specimens from 397 HCC patients, 114 healthy individuals, 43 patients with chronic hepatitis B virus (HBV) infection and 24 cirrhotic liver patients with HBV infection, and the correlation between DLK1 levels and clinical features was evaluated. Our data showed that the serum DLK1 level was significantly higher in HCC patients than in healthy individuals or patients with chronic HBV infection (HBV carriers) (P < 0.05). Moreover, the serum DLK1 levels were positively correlated with tumour size and α-fetoprotein (AFP) levels, but not with gender, age, histological grade, HBV infection, intrahepatic metastasis or cirrhosis in HCC patients. Kaplan-Meier analysis indicated that higher DLK1 levels were associated with shorter survival in HCC patients. These results suggest that the serum levels of DLK1 may serve as a prognostic biomarker for HCC patients.
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Affiliation(s)
- Hong Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China
| | - Mei-ling Cui
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China
| | - Tao-yang Chen
- Qidong Liver Cancer Institute, Qidong, 226200, China
| | - Hai-yang Xie
- Department of General Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Ying Cui
- Cancer Institute of Guangxi, Nanning, 530027, China
| | - Hong Tu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China
| | - Fu-hua Chen
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China
| | - Chao Ge
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China
| | - Jin-jun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, 25/Ln 2200, Xietu Road, Shanghai, 200032, China.
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Imprinted genes in myeloid lineage commitment in normal and malignant hematopoiesis. Leukemia 2015; 29:1233-42. [PMID: 25703588 DOI: 10.1038/leu.2015.47] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 01/27/2015] [Accepted: 02/16/2015] [Indexed: 12/12/2022]
Abstract
Genomic imprinting is characterized by the parent-of-origin monoallelic expression of several diploid genes because of epigenetic regulation. Imprinted genes (IGs) are key factors in development, supporting the ability of a genotype to produce phenotypes in response to environmental stimuli. IGs are highly expressed during prenatal stages but are downregulated after birth. They also affect aspects of life other than growth such as cognition, behavior, adaption to novel environments, social dominance and memory consolidation. Deregulated genomic imprinting leads to developmental disorders and is associated with solid and blood cancer as well. Several data have been published highlighting the involvement of IGs in as early as the very small embryonic-like stem cells stage and further during myeloid lineage commitment in normal and malignant hematopoiesis. Therefore, we have assembled the current knowledge on the topic, based mainly on recent findings, trying not to focus on a particular cluster but rather to have a global view of several different IGs in hematopoiesis.
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Benetatos L, Vartholomatos G, Hatzimichael E. DLK1-DIO3 imprinted cluster in induced pluripotency: landscape in the mist. Cell Mol Life Sci 2014; 71:4421-30. [PMID: 25098353 PMCID: PMC11113449 DOI: 10.1007/s00018-014-1698-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 07/29/2014] [Accepted: 07/31/2014] [Indexed: 12/20/2022]
Abstract
DLK1-DIO3 represents an imprinted cluster which genes are involved in physiological cell biology as early as the stem cell level and in the pathogenesis of several diseases. Transcription factor-mediated induced pluripotent cells (iPSCs) are considered an unlimited source of patient-specific hematopoietic stem cells for clinical application in patient-tailored regenerative medicine. However, to date there is no marker established able to distinguish embryonic stem cell-equivalent iPSCs or safe human iPSCs. Recent findings suggest that the DLK1-DIO3 locus possesses the potential to represent such a marker but there are also contradictory data. This review aims to report the current data on the topic describing both sides of the coin.
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Affiliation(s)
- Leonidas Benetatos
- Blood Bank, Selefkeias 2, Preveza General Hospital, 48100, Preveza, Greece,
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