Effect of Nogo deficiency on the insulin signaling pathway
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PROVIDER: PRJNA993241 | ENA |
REPOSITORIES: ENA
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Project description:The elevation of Nogo-B expression in T2DM mice and Nogo-B knockdown alleviated diabetic symptoms in db/db mice prompted us to further investigate the involvement of Nogo-B in the insulin signaling pathway and T2DM. The three isoforms of Nogo are derived from various RNA splicing events, so deleting Nogo-B exons 2-4 results in the deficiency of other Nogo members, resulting in Nogo knockout (Nogo-/-) mice. As the liver is the key organ in the systemic response to insulin and controls glucose and lipid metabolism, we conducted RNA-seq of livers isolated from 8-week-old Nogo-/- mice and WT littermates.
2023-07-24 | GSE236979 | GEO
Project description:Nogo, also called RTN4, functions through three isoforms including Nogo-A, -B, and -C. Although Nogo-A is a well-known CNS inhibitor and the level of Nogo-A is increased in muscles of ALS patients, its role in the regulation of skeletal muscle homeostasis and regeneration is still vague. In this study, we analyzed various pathological muscle condition of human and mouse model, and discovered significant increase of Nogo-A and myogenic factors. To understand the role of Nogo in skeletal muscle, muscle transcripts from Nogo+/+ and Nogo-/- mouse were analyzed and observed intensified gene expression involved in adipocyte differentiation and lipid metabolism, and reduced gene expression related to muscle differentiation and structure organization suggesting muscle disorder from muscle replacement with fat deposition. Skeletal muscle structure from Nogo null mice displayed dystrophic phenotypes including impaired myofiber structure and immune cell infiltrations, and dysregulated homeostatic features such as higher level of MyoD, procaspase 3, CHOP, and AKT compared to wild-type muscle. Notexin-injured Nogo deficient muscle resulted higher level of immune cell infiltration but defective in IL-6 production, a well-known myokine from immune cells, and abnormally upregulated regenerative muscle fibers than normal muscle. Therefore we hypothesized that increased Nogo-A in pathological conditions may regulate muscle regeneration. Then differentiating C2C12 cells and induced myogenic stem cells(iMSC) showed upregulated Nogo-A and Myogenin, and Nogo-A silencing in C2C12 cells abrogated the capability to differentiate into myotubes. In conclusion, Nogo functions to maintain muscle homeostasis and integrity, and altered Nogo-A expression in pathological muscle condition mediates muscle regeneration. These understanding suggests Nogo-A as a novel differentiation target for the treatment of myopathies at clinical set.
2019-05-31 | GSE131955 | GEO
Project description:In order to determine if there are any genetic differences among lungs of Nogo-A/B knockout mice which may explain their enhanced asthmatic-like responses, we have employed whole genome microarray expression profiling as a discovery platform to identify any genes that may be altered in the lung of Nogo-A/B knockout mice. RNA was isolated from three biological replicates of mouse lungs from naive WT and Nogo-A/B Knockout mice and run on agilent array. Two genes was significantly altered in Nogo-A/B Knockout lungs, SPLUNC1 and RTN4 (Nogo) which was significantly decreased and confirmed by real-time PCR.
2010-10-20 | GSE24218 | GEO
Project description:Nogo-A localized on myelin adaxonal membrane in the adult CNS is well known for its role as neurite outgrowth inhibitor following a lesion. Nogo-A KO mice show enhanced regenerative/compensatory fiber growth following CNS lesion. However, changes undergoing in their intact CNS have not been studied. Moreover, Nogo-A in the intact adult CNS in also expressed in some neuronal subpopulations, e.g. in the hippocampus, olfactory bulbs and dorsal root ganglia. We compared the intact adult CNS (spinal cord) of Nogo-A KO mice in order to identify: potential compensating molecules which could be interesting new inhibitory neurite outgrowth candidates, possible molecules involved in the up to now not yet clarified downstream signalling pathway of Nogo-A, additional new functions for myelin or neuronal Nogo-A in the intact adult CNS. Keywords: gene expression, Nogo-A KO, spinal cord, adult, naive, unlesioned
2010-11-01 | GSE11276 | GEO
Project description:In order to determine if there are any genetic differences among lungs of Nogo-A/B knockout mice which may explain their enhanced asthmatic-like responses, we have employed whole genome microarray expression profiling as a discovery platform to identify any genes that may be altered in the lung of Nogo-A/B knockout mice. RNA was isolated from three biological replicates of mouse lungs from naive WT and Nogo-A/B Knockout mice and run on agilent array. Two genes was significantly altered in Nogo-A/B Knockout lungs, SPLUNC1 and RTN4 (Nogo) which was significantly decreased and confirmed by real-time PCR. Gene expression in naïve mouse lungs of WT and Nogo-A/B knockout mice was measured in three individual biological replicates from each group.
2010-10-20 | E-GEOD-24218 | biostudies-arrayexpress
Project description:Purpose: Acute lung injury (ALI) is a severe clinical disorder characterized by diffused capillary-alveolar barrier damage and noncardiogenic lung edema induced by excessive inflammation reactions. Nogo-B, a member of the reticulon 4 protein family, plays a critical role in modulating macrophages and neutrophils’ function in inflammation. Its role in ALI remains unclear. Methods: Pulmonary expression of Nogo-B was investigated in a LPS-induced ALI mice model. The effects and the underline mechanisms of Nogo-B expression on the severity of lung injury was assessed using histological examination, Bronchoalveolar lavage fluid (BALF) protein and inflammatory cells and cytokines measurement, and microarray analysis. Results: Nogo-B was normally highly expressed in the lungs of naïve C57BL/6 mice. Intra-tracheal instillation of LPS significantly repressed the Nogo-B expression in lung tissues and BALF cells of ALI mice. In addition, over-expression of pulmonary Nogo-B using an adenovirus vector which expresses a Nogo-B-RFP-3-flag fusion protein (Ad-Nogo-B) significantly prolonged the survival time of mice challenged with lethal dose of LPS. Histological results and BALF protein measurement convinced that Ad-Nogo-B treated mice had less severity of lung injury and alveolar protein exudation, as compared with control adenovirus treated mice (Ad-RFP). They also had higher MCP-1 secretion and alveolar macrophages infiltration, but lower neutrophils infiltration. Finally, using microarray analysis, we identified a protective gene, PTX3, was highly elevated in Ad-Nogo-B treated mice. Conclusions: Nogo-B played a protective role in LPS-induced ALI, which might exert its role through modulation of inflammatory response and PTX3 secretion.
2013-07-12 | GSE48787 | GEO
Project description:Purpose: Acute lung injury (ALI) is a severe clinical disorder characterized by diffused capillary-alveolar barrier damage and noncardiogenic lung edema induced by excessive inflammation reactions. Nogo-B, a member of the reticulon 4 protein family, plays a critical role in modulating macrophages and neutrophils’ function in inflammation. Its role in ALI remains unclear. Methods: Pulmonary expression of Nogo-B was investigated in a LPS-induced ALI mice model. The effects and the underline mechanisms of Nogo-B expression on the severity of lung injury was assessed using histological examination, Bronchoalveolar lavage fluid (BALF) protein and inflammatory cells and cytokines measurement, and microarray analysis. Results: Nogo-B was normally highly expressed in the lungs of naïve C57BL/6 mice. Intra-tracheal instillation of LPS significantly repressed the Nogo-B expression in lung tissues and BALF cells of ALI mice. In addition, over-expression of pulmonary Nogo-B using an adenovirus vector which expresses a Nogo-B-RFP-3-flag fusion protein (Ad-Nogo-B) significantly prolonged the survival time of mice challenged with lethal dose of LPS. Histological results and BALF protein measurement convinced that Ad-Nogo-B treated mice had less severity of lung injury and alveolar protein exudation, as compared with control adenovirus treated mice (Ad-RFP). They also had higher MCP-1 secretion and alveolar macrophages infiltration, but lower neutrophils infiltration. Finally, using microarray analysis, we identified a protective gene, PTX3, was highly elevated in Ad-Nogo-B treated mice. Conclusions: Nogo-B played a protective role in LPS-induced ALI, which might exert its role through modulation of inflammatory response and PTX3 secretion. A total of 12 samples from mice treated with or without LPS in the presence of Ad-Nogo-B or Ad-RFP transfection (n=3 for each group)
2013-07-12 | E-GEOD-48787 | biostudies-arrayexpress
Project description:Nogo-A localized on myelin adaxonal membrane in the adult CNS is well known for its role as neurite outgrowth inhibitor following a lesion. Nogo-A KO mice show enhanced regenerative/compensatory fiber growth following CNS lesion. However, changes undergoing in their intact CNS have not been studied. Moreover, Nogo-A in the intact adult CNS in also expressed in some neuronal subpopulations, e.g. in the hippocampus, olfactory bulbs and dorsal root ganglia. We compared the intact adult CNS (spinal cord) of Nogo-A KO mice in order to identify: potential compensating molecules which could be interesting new inhibitory neurite outgrowth candidates, possible molecules involved in the up to now not yet clarified downstream signalling pathway of Nogo-A, additional new functions for myelin or neuronal Nogo-A in the intact adult CNS. Keywords: gene expression, Nogo-A KO, spinal cord, adult, naive, unlesioned Spinal cords from 3 adult C57Bl/6 wild type and Nogo-A KO mice have been explanted. Total RNA has been extracted and processed for hybridization on Mouse 430 2.0 Affymetrix GeneChips. Following scanning and first analysis with MAS 5.0, further analysis was performed by GeneSpring 7.2 (Silicon Genetics, Redwood City, CA). A present call filter (2 out of 3 present calls in at least one out of the different studied conditions) was applied. Normalization was run per chip as well as per gene to the median of the control replicates. Data were statistical restricted through a 1-way Anova (p=0.05). A final threshold of =1.2 folds of increase or decrease in the expression level of each single transcript was applied. Regulated transcripts have been assigned to functional categories according to GeneOntology as well as literature and database mining (Pubmed and Bioinformatics Harvester EMBL Heidelberg).
2010-11-01 | E-GEOD-11276 | biostudies-arrayexpress
Project description:The neurite outgrowth inhibitory myelin protein Nogo-A has been well studied in the context of central nervous system (CNS) injury and disease. We studied the effects of the application of neutralizing anti-Nogo-A antibodies (11C7 and 7B12) in intact CNS tissue in vitro using rat organotypic hippocampal slice cultures. This study had the purpose of elucidating the role of Nogo-A in the adult intact CNS and determining the consequences of its neutralization through antibody application. In vitro cultures treated with anti-Nogo-A antibody showed an elicited growth response. The results also gave indications that hippocampal circuitry might be altered due to the regulation at the synaptic and neurotransmission level.
2008-11-12 | GSE12483 | GEO
Project description:Nogo-A is a major player in the regulation of neural development and regeneration, and it is the target of several clinical trials. Despite its high clinical relevance, the functions of Nogo-A outside the central nervous system are mostly unknown. In this work, we investigated the role of Nogo-A in tooth development in mouse transgenic models. We observed that Nogo-A is expressed in ameloblasts, the cells responsible for the formation of enamel. We show that the deletion of Nogo-A in the dental epithelium leads to the formation of defective enamel. By RNA sequencing we showed that this phenotype is associated with the overexpression of clusters of genes involved in cell differentiation and production of enamel.
2022-01-01 | GSE160829 | GEO