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Gene expression in spinal cord neurons grown on polyornithine or on carbon nanotube (CNT)-based substrates

ABSTRACT: Carbon nanotubes are cylindrically-shaped carbon nanostructures, made up of layers of graphene rolled onto themselves, with diameters similar to those of neuronal processes. In the last decade, CNT have been used as biocompatible growing substrates for neuronal attachment, differentiation and growth. In the perspective of new developments in tissue engineering, and in particular in spinal cord repair strategies, based on the use of CNTs, our aim is to clarify the biophysical interactions between CNTs and spinal cord neurons, studying the development of the morphological and functional characteristics of spinal neurons grown on CNT-based interfaces. In this context, we used microarrays to show whether cultured dissociated spinal neurons show a difference in gene expression when grown in control conditions (polyornithine-covered substrates) or on CNT-based substrates.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE27212 | GEO | 2013/08/05

SECONDARY ACCESSION(S): PRJNA137515

REPOSITORIES: GEO

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Gene expression in spinal cord neurons grown on polyornithine or on carbon nanotube (CNT)-based substrates

Project description:Carbon nanotubes are cylindrically-shaped carbon nanostructures, made up of layers of graphene rolled onto themselves, with diameters similar to those of neuronal processes. In the last decade, CNT have been used as biocompatible growing substrates for neuronal attachment, differentiation and growth. In the perspective of new developments in tissue engineering, and in particular in spinal cord repair strategies, based on the use of CNTs, our aim is to clarify the biophysical interactions between CNTs and spinal cord neurons, studying the development of the morphological and functional characteristics of spinal neurons grown on CNT-based interfaces. In this context, we used microarrays to show whether cultured dissociated spinal neurons show a difference in gene expression when grown in control conditions (polyornithine-covered substrates) or on CNT-based substrates. Gene expression profiling was evaluated from 3 replicates each of neurons grown on nanotubes and control conditions.

2013-08-05 | E-GEOD-27212 | biostudies-arrayexpress

Rattus norvegicus

Project description:Gene expression in spinal cord neurons grown on polyornithine or on carbon nanotube (CNT)-based substrates

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Whole genome expression signature of SWCNT and MWCNT vs. asbestos subchronic exposures to human pleural mesothelial cells

Project description:Malignant mesothelioma is one of the most aggressive forms of cancer known. Recent studies have shown that carbon nanotubes (CNTs) are biopersistent and induce mesothelioma in animals, but the underlying mechanisms are not known. Here, we investigate the effect of long-term exposure to CNTs on the aggressive behaviors of human pleural mesothelial cells, the primary cellular target of human lung mesothelioma. We show that sub-chronic exposure (4 month) to single- and multi-walled CNTs induced proliferation, migration and invasion of the cells similar to that observed in asbestos-exposed cells. An up-regulation of several key genes known to be important in cell invasion, notably matrix metalloproteinase-2 (MMP-2), was observed in the exposed mesothelial cells as determined by real-time PCR. Western blot and enzyme activity assays confirmed the increased expression and activity of MMP-2. Whole genome expression microarray analysis further indicated the importance of MMP-2 in the invasion gene signaling network of the exposed cells. Knockdown of MMP-2 in CNT and asbestos-exposed cells by shRNA-mediated gene silencing effectively inhibited the aggressive phenotypes. This study provides new evidence for CNT-induced cell invasion and indicates the role of MMP-2 in the process. Whole genome expression profiling was conducted on human immortalized pleural mesothelial cells (MeT5A) following 4 month in vitro sub-chronic exposure to six separate treatments to assess differences in carbon nanotube (CNT) vs. asbestos potential tumorigenesis signaling. Dispersed single wall CNT (D-SWCNT), multi-wall CNT (D-MWCNT), crocidolite asbestos (ASB) and saline (SAL) exposed cells were compared to SurvantaÂ® dispersant (DISP) passage control cells. DISP and SAL cells served as control treatments for CNT- and ASB-exposed cells, respectively. Each treatment possessed 3 biological cDNA replicates. One technical replicate was performed per biological sample.

2015-11-23 | E-GEOD-48855 | biostudies-arrayexpress

Profiling of gene expression in lung tissue in C57Bl/6 and DBA/2 mouse strains following exposure to carbon nanotubes

Project description:Carbon nanotubes (CNTs) are fibrous particulates made up of elemental carbon and a novel nanomaterial known for its variety of industrial applications. It has been shown that lung exposure to CNTs may cause adverse effects inclunding lung inflammation and remodeling in experimental models. We investigated the impact of genetic background on the development of adverse outcomes by comparing several common inbred mouse strains and found that C57Bl/6 and DBA/2 strains were polarized in their sensitivity to adverse changes at 4 weeks following an exposure to 4 mg/kg CNT. Here we compare underlying gene expression profiles which may inform the understanding of lung biology underpinning genetic susceptibility to adverse outcomes following environmental or occupational exposure to CNTs.

2017-08-18 | GSE86339 | GEO

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Project description:archaea-cnt Raw sequence reads

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Whole genome expression signature of SWCNT and MWCNT vs. asbestos subchronic exposures to human pleural mesothelial cells

2015-11-23 | GSE48855 | GEO

Discovery of potential candidate proteins reprogramming spinal cord derived astrocytes into neurons by proteomic analysis

Project description:Spinal cord injury (SCI) is a common but devastating trauma of the central nerve system. In this study, we reprogrammed cultured spinal-cord reactive astrocytes into neurons by Neurod1 expression. The mechanism of programmed conversion from astrocytes to neurons has not been clarified yet. Thus, we used label-free proteomics to identify differentially expressed proteins in Neurod1 over-expressed astrocytes and control group. A total of 1952 proteins were identified, including 92 significantly changed proteins. Among these proteins, 8 proteins were identified as candidates involving in the process of the reprogramming, based on their biological function and fold change in the bioinformatic analysis. Our study revealed that that Neurod1 can directly reprogram cultured spinal-cord reactive astrocytes into neurons, and several proteins that could play a significant role during the neuronal reprogramming were discovered.

2021-09-08 | PXD016097 | Pride

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Project description:Salinispora pacifica CNT-150 transcriptomics - CNT-150-216H-1

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Project description:Salinispora pacifica CNT-150 transcriptomics - CNT-150-96H-3

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Project description:Salinispora pacifica CNT-150 transcriptomics - CNT-150-216H-3

| PRJNA415648 | ENA