Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Spatiotemporal control of SMARCA5 by a MAPK-RUNX1 axis distinguishes mutant KRAS-driven pancreatic malignancy from tissue regeneration (RNA-Seq)

ABSTRACT: De-differentiation or trans-differentiation is a common response to injury in many tissues, and the processes predispose cells to cancer. Acute pancreatitis-induced acinar-to-ductal metaplasia (ADM) is similar to pancreatic ductal adenocarcinoma (PDAC) at both the chromatin level and gene expression level. Mutant KRAS induces chromatin remodeling activities required for both regeneration and tumorigenesis at the peak of ADM, and it blocks regeneration. We show that chromatin remodeler SMARCA5 (SNF2H) can promotes the regeneration defects caused by mutant KRAS by maintaining chromatin accessibility at regions specifically required for malignancy. Mechanistically, regeneration-related chromatin remodeling activities are shared between wild-type and mutant KRAS and they occur very early upon pancreatitis, while the malignancy-related chromatin regions become accessible much later. The activity of SMARCA5 is controlled spatiotemporally by transcription factor RUNX1, which is only accumulated at sufficient levels at late ADM lock-in stage. Finally, we show that the malignancy regulation activity of SMARCA5 is different from its general function in CTCF recruitment. In summary, we have identified a specific function of a general chromatin remodeler that is precisely controlled during acinar cell trans-differentiation to separate malignancy from tissue regeneration.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE248947 | GEO | 2025/07/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Spatiotemporal control of SMARCA5 by a MAPK-RUNX1 axis distinguishes mutant KRAS-driven pancreatic malignancy from tissue regeneration (CUT&Tag)

Project description:De-differentiation or trans-differentiation is a common response to injury in many tissues, and the processes predispose cells to cancer. Acute pancreatitis-induced acinar-to-ductal metaplasia (ADM) is similar to pancreatic ductal adenocarcinoma (PDAC) at both the chromatin level and gene expression level. Mutant KRAS induces chromatin remodeling activities required for both regeneration and tumorigenesis at the peak of ADM, and it blocks regeneration. We show that chromatin remodeler SMARCA5 (SNF2H) can promotes the regeneration defects caused by mutant KRAS by maintaining chromatin accessibility at regions specifically required for malignancy. Mechanistically, regeneration-related chromatin remodeling activities are shared between wild-type and mutant KRAS and they occur very early upon pancreatitis, while the malignancy-related chromatin regions become accessible much later. The activity of SMARCA5 is controlled spatiotemporally by transcription factor RUNX1, which is only accumulated at sufficient levels at late ADM lock-in stage. Finally, we show that the malignancy regulation activity of SMARCA5 is different from its general function in CTCF recruitment. In summary, we have identified a specific function of a general chromatin remodeler that is precisely controlled during acinar cell trans-differentiation to separate malignancy from tissue regeneration.

2025-07-01 | GSE248945 | GEO

Spatiotemporal control of SMARCA5 by a MAPK-RUNX1 axis distinguishes mutant KRAS-driven pancreatic malignancy from tissue regeneration (ChIP-Seq)

2025-07-01 | GSE248943 | GEO

Spatiotemporal control of SMARCA5 by a MAPK-RUNX1 axis distinguishes mutant KRAS-driven pancreatic malignancy from tissue regeneration (CUT&RUN)

2025-07-01 | GSE248944 | GEO

Spatiotemporal control of SMARCA5 by a MAPK-RUNX1 axis distinguishes mutant KRAS-driven pancreatic malignancy from tissue regeneration (ATAC-Seq)

2025-07-01 | GSE248942 | GEO

Pancreatic STAT5 activation promotes KrasG12D- and inflammation- induced acinar-to-ductal metaplasia and pancreatic cancer

Project description:Pancreatic ductal adenocarcinoma (PDAC) remains a highly lethal malignancy due to its predilection for late-stage presentation. Signal transducer and activator of transcription 5 (STAT5) is a transcription factor implicated in the progression of various cancer types. However, its functional role in KRAS-driven pancreatic tumorigenesis remains unclear. We found that high levels of STAT5 in tumor cells were associated with a poorer prognosis in patients. The loss of Stat5 in acinar cells significantly reduced the development of acinar-to-ductal metaplasia (ADM) and PDAC lesions driven by KRAS mutation and pancreatitis. IL-22 signaling, induced by chronic inflammation, enhanced KRAS-mutant mediated STAT5 phosphorylation and the tumor-promoting function of IL-22 depends on the activation of STAT5. Chromatin immunoprecipitation assays revealed that STAT5 was directly bound to the promoters of ADM mediators HNF4a.

2025-01-25 | GSE254340 | GEO

Gene expression profile of ADM, ductal and acinar cells in the setting of pancreatitis

Project description:In order to compare the gene expression profile of acinar-to-ductal metaplasia (ADM), ductal and acinar cells in the setting of pancreatitis, which were obtained by laser-capture microdissection (LMD) from frozen sections of wild type mice pancreata 2 days after caerulein administration, we performed microarray analysis. ADM has an intermediate property between ductal and acinar cells in the setting of pancreatitis, and Cxcr4 mRNA which is expressed in multipotent pancreatic progenitors, were up-regulated in ADM compared with ductal cells or acinar cells. Notably, in consistent with our immunostaining data, Dclk1 mRNA was highly expressed in ADM cells compared with ductal and acinar cells.

2017-06-21 | GSE100270 | GEO

Identification of transcriptional signatures overlapping in pancreatic ductal development, acute pancreatitis and KrasG12D-driven carcinogenesis

Project description:To determine the molecular basis of gene regulation in pancreatic ductal epithelial cells, we developed methods for the isolation of this cell population during mouse development and normal adult homeostasis, as well as in conditions with ductal features (acinar-to-ductal metaplasia (ADM), pancreatic intraepithelial neoplasia (PanIN) and pancreatic ductal adenocarcinoma (PDAC)). Our technique utilizes the specificity of Dolichos biflorus Agglutinin (DBA) lectin marking the entire normal ductal tree, including terminal intercalated ducts (putative sites of stem or progenitor cells) and ductal structures in ADM and PanIN. We used ferromagnetic-labeled DBA lectin to isolate ductal structures. Ductal cells were isolated under the following conditions: (1) Embryonic Development in wild type mice: E14.5, E15.5, E16.5, and postnatal day 1 (P1); (2) Injury and regeneration (pancreatitis) 0, 1, 3, 5 days following cerulein-induced acute pancreatitis. Cerulein is a cholecystokinin analog which produces a self-limited pancreatitis with injury and subsequent regeneration and repair, completed five days after insult; and (3) Pdx1-Cre;LSL-KrasG12D/+ mice aged 10 and 20 weeks that harbor PanIN lesions and a subset develop PDAC. Ductal/PanIN cells were isolated from these mice and appropriate control mice (Pdx1-Cre;Kras+/+).

2015-09-30 | GSE40895 | GEO

Epithelial memory of resolved inflammation limits tissue damage while promoting pancreatic tumorigenesis [scRNA-Seq]

Project description:Inflammation is a major risk factor for pancreatic ductal adenocarcinoma (PDAC). When occurring in the context of pancreatitis, mutations of KRAS accelerate tumor development. We discovered that long after its complete resolution, a transient inflammatory event primes pancreatic epithelial cells to subsequent transformation by oncogenic KRAS. Upon recovery from acute inflammation, epithelial cells of the pancreas display an enduring adaptive response associated with sustained transcriptional and epigenetic reprogramming. Such adaptation enables the prompt reactivation of acinar-to-ductal metaplasia (ADM) upon subsequent inflammatory events, thus efficiently limiting tissue damage via rapid decrease of zymogen production. We propose that since activating mutations of KRAS maintain an irreversible ADM, they may be beneficial and under strong positive selection in the context of recurrent pancreatitis.

2021-09-17 | GSE181276 | GEO

Epithelial memory of resolved inflammation limits tissue damage while promoting pancreatic tumorigenesis [RNA-seq]

2021-09-17 | GSE180211 | GEO

Epithelial memory of resolved inflammation limits tissue damage while promoting pancreatic tumorigenesis [ChIP-seq]

2021-09-17 | GSE180199 | GEO