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The lncRNA NEAT1_1 is seemingly dispensable for normal tissue homeostasis and cancer cell growth

ABSTRACT: The lncRNA NEAT1_1 is seemingly dispensable for normal tissue homeostasis and cancer cell growth

PROVIDER: PRJNA564816 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10095934.fastq.gz	Fastqsanger.gz
	SRR10095935.fastq.gz	Fastqsanger.gz
	SRR10095936.fastq.gz	Fastqsanger.gz
	SRR10095937.fastq.gz	Fastqsanger.gz
	SRR10095938.fastq.gz	Fastqsanger.gz

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Peroxisomes are dispensable for normal renal function.

Project description:Peroxisomes are dispensable for normal renal function.

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The lncRNA NEAT1_1 is seemingly dispensable for normal tissue homeostasis and cancer cell growth

Project description:NEAT1 is one of the most studied lncRNAs, in part because its silencing in mice causes defects in mammary gland development and corpus luteum formation and protects them from skin cancer development. Moreover, depleting NEAT1 in established cancer cell lines reduces growth and sensitizes cells to DNA damaging agents. However, NEAT1 produces two isoforms and because the short isoform, NEAT1_1, completely overlaps the 5' part of the long NEAT1_2 isoform, the respective contributions of each of the isoforms to these phenotypes has remained unclear. Whereas NEAT1_1 is highly expressed in most tissues, NEAT1_2 is the central architectural component of paraspeckles, which are nuclear bodies that assemble in specific tissues and cells exposed to various forms of stress. Using dual RNA-FISH to detect both NEAT1_1 outside of paraspeckles and NEAT1_2/NEAT1 inside this nuclear body, we report herein that NEAT1_1 levels are dynamically regulated during the cell cycle and targeted for degradation by the nuclear RNA exosome. Unexpectedly, however, cancer cells engineered to lack NEAT1_1, but not NEAT1_2, do not exhibit cell cycle defects. Moreover, Neat1_1-specific knockout mice do not exhibit the phenotypes observed in Neat1-deficient mice. We propose that NEAT1 functions are mainly, if not exclusively, attributable to NEAT1_2 and, by extension, to paraspeckles.

2019-09-11 | GSE137211 | GEO

FAM111A is dispensable for electrolyte homeostasis in mice

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DJ-1 is dispensable for human stem cell homeostasis

Project description:DJ-1 is dispensable for human stem cell homeostasis

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The long noncoding RNA <i>NEAT1_1</i> is seemingly dispensable for normal tissue homeostasis and cancer cell growth.

Project description:NEAT1 is one of the most studied lncRNAs, in part because its silencing in mice causes defects in mammary gland development and corpus luteum formation and protects them from skin cancer development. Moreover, depleting NEAT1 in established cancer cell lines reduces growth and sensitizes cells to DNA damaging agents. However, NEAT1 produces two isoforms and because the short isoform, NEAT1_1, completely overlaps the 5' part of the long NEAT1_2 isoform; the respective contributions of each of the isoforms to these phenotypes has remained unclear. Whereas NEAT1_1 is highly expressed in most tissues, NEAT1_2 is the central architectural component of paraspeckles, which are nuclear bodies that assemble in specific tissues and cells exposed to various forms of stress. Using dual RNA-FISH to detect both NEAT1_1 outside of the paraspeckles and NEAT1_2/NEAT1 inside this nuclear body, we report herein that NEAT1_1 levels are dynamically regulated during the cell cycle and targeted for degradation by the nuclear RNA exosome. Unexpectedly, however, cancer cells engineered to lack NEAT1_1, but not NEAT1_2, do not exhibit cell cycle defects. Moreover, Neat1_1-specific knockout mice do not exhibit the phenotypes observed in Neat1-deficient mice. We propose that NEAT1 functions are mainly, if not exclusively, attributable to NEAT1_2 and, by extension, to paraspeckles.

| S-EPMC6859857 | biostudies-literature

RNA editing is the essential function of ADAR1 and, in the absence of MDA5, is dispensable for normal adult homeostasis

Project description:RNA editing is the essential function of ADAR1 and, in the absence of MDA5, is dispensable for normal adult homeostasis

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Loss of executioner caspases-3 and -7 in intestinal epithelial cells is dispensable but can be compensated allowing normal gut homeostasis

Project description:Loss of executioner caspases-3 and -7 in intestinal epithelial cells is dispensable but can be compensated allowing normal gut homeostasis

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Peroxisomes are dispensable for normal renal function.

Project description:Peroxisomes are highly abundant in proximal tubules where peroxisomal enzymes have been proposed to play an important role in a variety of metabolic and antioxidant functions. This hypothesis was supported by human genetic studies that identified mutations leading to peroxisomal biogenesis deficiency, resulting in severe multi-organ damage (Zellweger’s spectrum disorders (ZSD)), including renal impairment. However, the role of proximal tubule peroxisomes in renal (patho)physiology remains uninvestigated. We addressed this question in mice with conditional ablation of peroxisomal biogenesis in the renal tubule. Our results demonstrate that renal tubular peroxisomes are dispensable for normal renal function and suggest that renal damage in ZSD patients is of extrarenal origin.

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Aberrant lncRNA expression profiles in OSCC tissues compared with paired normal oral mucosa

Project description:Hypoxic microenvironment plays important roles in the progression of solid tumors including oral squamous cell carcinoma (OSCC). Long noncoding RNAs (lncRNAs) have gained much attention in the past few years. However, it is not clear whether lncRNAs could regulate hypoxia-adaptation of OSCC, and which lncRNAs participate in this process. Using an lncRNA microarray, we analyzed the aberrant lncRNA expression profiles in OSCC tissues compared with paired normal oral mucosa as well as in hypoxic OSCC cells compared with normoxic OSCC cells. Our data revealed 2053 differentially expressed (Fold Change >= 2.0, P-value <= 0.05) lncRNAs, among which 934 lncRNAs were significantly up-regulated and 1119 lncRNAs were down-regulated in OSCC compared with paired normal mucosa. Six OSCC tissues and paired normal oral mucosa were obtained from 6 patients with OSCC. LncRNA expression profiles were evaluated by an Agilent Human LncRNA Array v3.0 (8 x 60K, Arraystar).

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Spatiotemporal role of the lncRNA Evx1as in embryonic patterning

Project description:We performed spatial transcriptome analysis on cryosections of gastrulating embryos from E6.5 to E7.5 by low-input RNA sequencing (Geo-seq). Careful spatial transcriptomic analysis revealed that the lncRNA Evx1as plays a transient spatiotemporal role in regulating embryonic patterning during gastrulation, yet is dispensable for overall development and survival. Altogether, these results suggest that many lncRNAs are generally dispensable for normal development and survival, but may be selectively required in a particular context in vivo.

2018-02-15 | GSE104292 | GEO

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