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The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ATAC-Seq)

ABSTRACT: The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ATAC-Seq)

PROVIDER: PRJNA627479 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11590673_1.fastq.gz	Fastqsanger.gz
	SRR11590673_2.fastq.gz	Fastqsanger.gz
	SRR11590674_1.fastq.gz	Fastqsanger.gz
	SRR11590674_2.fastq.gz	Fastqsanger.gz
	SRR11590675_1.fastq.gz	Fastqsanger.gz

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The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (RNA-Seq)

Project description:The NSD2 p.E1099K (EK) mutation increases methyltransferase activity and is observed in 10% of acute lymphoblastic leukemia (ALL) samples with enrichment at relapse indicating a role in clonal evolution and drug resistance. To discover mechanisms that mediate the clonal expansion, we engineered B-ALL cell lines (Reh, 697) to overexpress wildtype (WT) and EK NSD2, but observed no differences in proliferation, clonal growth, or chemosensitivity. To address whether NSD2 EK acts collaboratively with other pathways, we used shRNAs to knockdown expression of NSD2 in B-ALL cell lines heterozygous for NSD2 EK (RS4;11, RCH-ACV, SEM). Knockdown resulted in decreased proliferation in all three lines, decreased clonal growth in RCH-ACV, and increased sensitivity to chemotherapeutic agents routinely used in ALL therapy, although the pattern of drug sensitivity varied among cell lines implying that the oncogenic properties of NSD2 mutations are likely cell context specific and rely on cooperative pathways to exert its effect. Knockdown of both Type II and REIIBP EK isoforms had a greater impact than knockdown of Type II alone, suggesting that both SET containing EK isoforms contribute to phenotypic changes driving relapse. Furthermore, in vivo models using both cell lines and patient samples revealed dramatically enhanced proliferation of NSD2 EK compared to WT and reduced sensitivity to 6-mercaptopurine in the relapse sample relative to diagnosis. Finally, EK-mediated changes in chromatin state and transcriptional output differed dramatically among cell lines further supporting a cell context specific role of NSD2 EK. These results demonstrate a unique role of NSD2 EK in mediating clonal fitness through pleiotropic mechanisms dependent on the genetic and epigenetic landscape.

2020-04-23 | GSE149158 | GEO

The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ChIP-Seq)

2020-04-23 | GSE149157 | GEO

The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ATAC-Seq)

2020-04-23 | GSE149155 | GEO

The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia

Project description:The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia

| PRJNA627472 | ENA

The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (RNA-Seq)

Project description:The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (RNA-Seq)

| PRJNA627477 | ENA

The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ChIP-Seq)

Project description:The NSD2 p.E1099K Mutation is Enriched at Relapse and Confers Drug Resistance in a Cell Context Dependent Manner in Pediatric Acute Lymphoblastic Leukemia (ChIP-Seq)

| PRJNA627478 | ENA

The NSD2 p.E1099K Mutation Is Enriched at Relapse and Confers Drug Resistance in a Cell Context-Dependent Manner in Pediatric Acute Lymphoblastic Leukemia.

Project description:The NSD2 p.E1099K (EK) mutation is observed in 10% of acute lymphoblastic leukemia (ALL) samples with enrichment at relapse indicating a role in clonal evolution and drug resistance. To discover mechanisms that mediate clonal expansion, we engineered B-precursor ALL (B-ALL) cell lines (Reh, 697) to overexpress wildtype (WT) and EK NSD2, but observed no differences in proliferation, clonal growth, or chemosensitivity. To address whether NSD2 EK acts collaboratively with other pathways, we used short hairpin RNAs to knockdown expression of NSD2 in B-ALL cell lines heterozygous for NSD2 EK (RS4;11, RCH-ACV, SEM). Knockdown resulted in decreased proliferation in all lines, decreased clonal growth in RCH-ACV, and increased sensitivity to cytotoxic chemotherapeutic agents, although the pattern of drug sensitivity varied among cell lines implying that the oncogenic properties of NSD2 mutations are likely cell context specific and rely on cooperative pathways. Knockdown of both Type II and REIIBP EK isoforms had a greater impact than knockdown of Type II alone, suggesting that both SET containing EK isoforms contribute to phenotypic changes driving relapse. Furthermore, in vivo models using both cell lines and patient samples revealed dramatically enhanced proliferation of NSD2 EK compared with WT and reduced sensitivity to 6-mercaptopurine in the relapse sample relative to diagnosis. Finally, EK-mediated changes in chromatin state and transcriptional output differed dramatically among cell lines further supporting a cell context-specific role of NSD2 EK. These results demonstrate a unique role of NSD2 EK in mediating clonal fitness through pleiotropic mechanisms dependent on the genetic and epigenetic landscape. IMPLICATIONS: NSD2 EK mutation leads to drug resistance and a clonal advantage in childhood B-ALL.

| S-EPMC7415532 | biostudies-literature

NSD2 links dimethylation of histone H3 at lysine 36 to oncogenic programming [RNAi]

Project description:NSD2 (also named MMSET and WHSC1) is a histone lysine methyltransferase that is implicated in diverse diseases and commonly overexpressed in multiple myeloma due to a recurrent t(4;14) chromosomal translocation. However, the precise catalytic activity of NSD2 is obscure, preventing progress in understanding how this enzyme influences chromatin biology and myeloma pathogenesis. Here we show that dimethylation of histone H3 at lysine 36 (H3K36me2) is the principal chromatin-regulatory activity of NSD2. Catalysis of H3K36me2 by NSD2 is sufficient for gene activation. In t(4;14)-positive myeloma cells, the normal genome-wide and gene-specific distribution of H3K36me2 is obliterated, creating a chromatin landscape that selects for a transcription profile favorable for myelomagenesis. Catalytically active NSD2 confers xenograft tumor formation and invasion capacity upon t(4;14)-negative cells and NSD2 promotes oncogenic transformation of primary cells in an H3K36me2-dependent manner. Together our findings establish H3K36me2 as the primary product generated by NSD2, and demonstrate that genomic disorganization of this canonical chromatin mark initiates oncogenic programming. Genome-wide expression profiling of KMS11 cells stably transduced with control vector in comparison to two independent shRNAs against NSD2. Each cell line is tested in duplicate.

2011-11-29 | E-GEOD-29147 | biostudies-arrayexpress

NSD2 links dimethylation of histone H3 at lysine 36 to oncogenic programming [Transduction]

Project description:NSD2 (also named MMSET and WHSC1) is a histone lysine methyltransferase that is implicated in diverse diseases and commonly overexpressed in multiple myeloma due to a recurrent t(4;14) chromosomal translocation. However, the precise catalytic activity of NSD2 is obscure, preventing progress in understanding how this enzyme influences chromatin biology and myeloma pathogenesis. Here we show that dimethylation of histone H3 at lysine 36 (H3K36me2) is the principal chromatin-regulatory activity of NSD2. Catalysis of H3K36me2 by NSD2 is sufficient for gene activation. In t(4;14)-positive myeloma cells, the normal genome-wide and gene-specific distribution of H3K36me2 is obliterated, creating a chromatin landscape that selects for a transcription profile favorable for myelomagenesis. Catalytically active NSD2 confers xenograft tumor formation and invasion capacity upon t(4;14)-negative cells and NSD2 promotes oncogenic transformation of primary cells in an H3K36me2-dependent manner. Together our findings establish H3K36me2 as the primary product generated by NSD2, and demonstrate that genomic disorganization of this canonical chromatin mark initiates oncogenic programming. Genome-wide expression profiling of p19ARF-/- mouse embryonic fibroblasts stably transduced with control vector or wild-type NSD2. Each cell line is tested in triplicate.

2011-11-29 | E-GEOD-29150 | biostudies-arrayexpress

NSD2 links dimethylation of histone H3 at lysine 36 to oncogenic programming [TKO]

Project description:NSD2 (also named MMSET and WHSC1) is a histone lysine methyltransferase that is implicated in diverse diseases and commonly overexpressed in multiple myeloma due to a recurrent t(4;14) chromosomal translocation. However, the precise catalytic activity of NSD2 is obscure, preventing progress in understanding how this enzyme influences chromatin biology and myeloma pathogenesis. Here we show that dimethylation of histone H3 at lysine 36 (H3K36me2) is the principal chromatin-regulatory activity of NSD2. Catalysis of H3K36me2 by NSD2 is sufficient for gene activation. In t(4;14)-positive myeloma cells, the normal genome-wide and gene-specific distribution of H3K36me2 is obliterated, creating a chromatin landscape that selects for a transcription profile favorable for myelomagenesis. Catalytically active NSD2 confers xenograft tumor formation and invasion capacity upon t(4;14)-negative cells and NSD2 promotes oncogenic transformation of primary cells in an H3K36me2-dependent manner. Together our findings establish H3K36me2 as the primary product generated by NSD2, and demonstrate that genomic disorganization of this canonical chromatin mark initiates oncogenic programming. Genome-wide expression profiling of KMS11 and t(4;14) translocation knockout (TKO) cells. Each cell line is tested in triplicate.

2011-11-29 | E-GEOD-29148 | biostudies-arrayexpress

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