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ATRX alteration contributes to tumor growth and immune escape in pleomorphic sarcomas

ABSTRACT: ATRX alteration contributes to tumor growth and immune escape in pleomorphic sarcomas

PROVIDER: PRJNA663493 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12642035_1.fastq.gz	Fastqsanger.gz
	SRR12642035_2.fastq.gz	Fastqsanger.gz
	SRR12642036_1.fastq.gz	Fastqsanger.gz
	SRR12642036_2.fastq.gz	Fastqsanger.gz
	SRR12642037_1.fastq.gz	Fastqsanger.gz

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ATRX alteration contributes to tumor growth and immune escape in pleomorphic sarcomas

Project description:Whole genome and transcriptome sequencing of a cohort of 67 leiomyosarcomas revealed ATRX to be one of the most frequently mutated genes in LMS after TP53 and RB1. While its function is well described in the ALT mechanism, we wondered whether its alteration could have complementary effects on sarcoma oncogenesis. ATRX alteration is associated with the down-expression of genes linked to differentiation in LMS, and to immunity in an additional cohort of 60 poorly differentiated sarcomas. In vitro and in vivo models showed that ATRX loss increases tumor growth rate and immune escape by decreasing the immunity load of active mast cells in sarcoma tumors. These data indicate that an alternative to unsuccessful targeting of the adaptive immune system in sarcoma could be to target the innate system. This might lead to a better outcome for sarcoma patients in terms of ATRX status.

2021-05-25 | GSE157953 | GEO

ATRX Alteration Contributes to Tumor Growth and Immune Escape in Pleomorphic Sarcomas.

Project description:Whole genome and transcriptome sequencing of a cohort of 67 leiomyosarcomas has been revealed ATRX to be one of the most frequently mutated genes in leiomyosarcomas after TP53 and RB1. While its function is well described in the alternative lengthening of telomeres mechanism, we wondered whether its alteration could have complementary effects on sarcoma oncogenesis. ATRX alteration is associated with the down-expression of genes linked to differentiation in leiomyosarcomas, and to immunity in an additional cohort of 60 poorly differentiated pleomorphic sarcomas. In vitro and in vivo models showed that ATRX down-expression increases tumor growth rate and immune escape by decreasing the immunity load of active mast cells in sarcoma tumors. These data indicate that an alternative to unsuccessful targeting of the adaptive immune system in sarcoma could target the innate system. This might lead to a better outcome for sarcoma patients in terms of ATRX status.

| S-EPMC8124877 | biostudies-literature

Transcriptomic analysis of 162 myxofibrosarcomas and undifferentiated pleomorphic sarcomas

Project description:The global gene expression profiles of 162 myxofibrosarcomas and undifferentiated pleomorphic sarcomas were studied by RNA-sequencing. The profiles were compared with clinical and genomic features. 21 soft tissue tumors of other histotypes were used as out-group.

2024-09-30 | E-MTAB-13947 | biostudies-arrayexpress

Zebrafish Samples for Loss of ATRX cooperates with p53-Deficiency to promote the Development of Sarcomas and other Malignancies

Project description:The SWI/SNF-family chromatin remodeling protein ATRX is a tumor suppressor in sarcomas, gliomas and other malignancies. Its loss of function facilitates the alternative lengthening of telomeres (ALT) pathway in tumor cells, while it also affects Polycomb repressive complex 2 (PRC2) silencing of its target genes. To further define the role of inactivating ATRX mutations in carcinogenesis, we knocked out atrx in our previously published p53/nf1-deficient zebrafish line that develops malignant peripheral nerve sheath tumors and gliomas. Complete inactivation of atrx using CRISPR-cas9 was lethal in developing fish and resulted in an alpha-thalassemia-like phenotype including reduced alpha-globin expression. In p53/nf1-deficient zebrafish neither peripheral nerve sheath tumors nor gliomas showed accelerated onset in atrx+/- fish, but these fish developed various tumors that were not observed in their atrx+/+ siblings, including epithelioid sarcoma, angiosarcoma, undifferentiated pleomorphic sarcoma and rare types of carcinoma. Most of these cancer types are included in the AACR Genie database of human tumors associated with mutant ATRX, indicating that our zebrafish model reliably reflects a role for ATRX-loss in the early pathogenesis of these types of human cancers. RNA-seq of p53/nf1- and p53/nf1/atrx-deficient tumors revealed that down-regulation of telomerase accompanied ALT-mediated lengthening of the telomeres in atrx-mutant samples. Moreover, inactivating mutations in atrx disturbed PRC2-target gene silencing, indicating a connection between ATRX loss and PRC2 dysfunction in cancer development.

2019-02-15 | GSE125040 | GEO

Gene expression profiling in leiomyosarcomas and undifferentiated pleomorphic sarcomas: SRC as a new diagnostic marker

2013-09-15 | GSE49941 | GEO

RNA-sequencing of primary soft tissue sarcomas and cell lines with ATRX deletion

Project description:RNA sequencing of a primary tumors from a sarcoma genetically engineerted mouse model with activation of oncogenic Kras, deletion of p53 and deletion of Atrx, as compared to control sarcomas with identical genetic alterations but with wild-type Atrx. Tumors were either untreated or recieved 20 Gy of ionizing radiation and were harvested at 4 hrs, 3 day, or 6 day timepoints post treatment. For cell lines, isogenic ATRX wild-type (WT) and ATRX knockout (KO) paired isogenic cell lines treated with either 1.)interferon stimulatory DNA (ISD) and harvested 24 hours after treatment, 2)4 Gy ionizing radiation and harvested 36 hours after treatment, or 3) untreated control. These experiments help determine the differential impact of ATRX mutational status on cGAS-STING and type-I interferon signaling in soft tissue sarcoma.

2021-03-06 | GSE167537 | GEO

20 human soft-tissue sarcomas (TMT)

Project description:SCX fractiond, TMT labeled pleomorphic soft-tissue sarcomas. 32 raw files (8x4) plus 8 pools (also TMT labeled) corresponding to each SCX fraction are submitted. The latter were used to propagate identifications across the runs.

2020-01-27 | PXD000617 | Pride

Single cell RNA-sequencing of undifferentiated pleomorphic sarcomas and leiomyosarcomas.

Project description:Single cell RNA-sequencing of undifferentiated pleomorphic sarcomas and leiomyosarcomas.

| PRJNA875907 | ENA

Undifferentiated Pleomorphic Sarcoma Model

Project description:Analysis of undifferentiated pleomorphic sarcoma/malignant fibrous histiocytoma-like tumors from LSL-KrasG12D, p53Fl/Fl mouse model of soft tissue sarcoma. Murine soft tissue sarcomas (n = 17) were compared to normal muscle (n = 4). Tumors were isolated surgically from soft tissue sarcomas generated by conditional Kras and p53 alleles. Tumors were induced using an adenovirus expressing Cre recombinase. Normal muscle samples were isolated from mice of the same genotype without tumor induction.

2010-03-03 | E-GEOD-16779 | biostudies-arrayexpress

Gene expression profiling in leiomyosarcomas and undifferentiated pleomorphic sarcomas: SRC as a new diagnostic marker

Project description:Transcriptional profiling of leiomyosarcomas (LMS) and undifferentiated pleomorphic sarcomas (UPS) aiming to identify molecular biomarkers. Data were validated using RT-qPCR. To assess the relevance of the gene signature, a meta-analysis was performed using five published studies. SRC protein immunolabeling was performed for 38 UPS and 52 LMS. Experiment condition, 22 LMS vs. 22 UPS. Total RNA extracted from tumors was labeled with Cy5, while a custom reference sample (combination of equal amounts of total RNA obtained from 15 different human cell lines) was labeled with Cy3. Samples Cy3 and Cy5 were mixed and hybridized on a two-Color Human GE 4X44K Microarray platform (Agilent Technologies, Palo Alto, CA, USA).

2013-09-15 | E-GEOD-49941 | biostudies-arrayexpress

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