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Interaction between stem cells and CNT@graphene oxide nanoribbon bilayer membrane with similar structure and different electrical conductivity.

ABSTRACT: Interaction between stem cells and CNT@graphene oxide nanoribbon bilayer membrane with similar structure and different electrical conductivity.

PROVIDER: PRJNA1007752 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25714926.fastq.gz	Fastqsanger.gz
	SRR25714927.fastq.gz	Fastqsanger.gz
	SRR25714928.fastq.gz	Fastqsanger.gz
	SRR25714929.fastq.gz	Fastqsanger.gz
	SRR25714930.fastq.gz	Fastqsanger.gz

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Graphene-polymer nanofibers enable optically induced electrical maturation in stem cell-derived cardiomyocytes and brain organoids

Project description:Pluripotent stem cell (PSC)-derived electrically excitable cells provide a unique window into human disease and development, but they remain electrically immature compared to their in vivo counterparts, partially due to the lack of chronic stimulation. New classes of on-demand, electrically active biomaterials are being employed to enhance cell functions, and here, we fabricated biocompatible, electrospun polymer nanofibers containing light-reactive reduced graphene oxide (rGO). Fiber size, stiffness, and electrical conductivity scaled with rGO concentration which in turn produced conduction-dependent effects in PSC-derived cardiomyocytes and neurons; with acute light stimulation on scaffolds containing rGO, cardiomyocytes exhibited more calcium handling activity and were more synchronous, and neurons showed more peaks with higher frequency. Chronic repetitive, daily light stimulation of nanofibers integrated into mature brain organoids caused organoids to become increasingly more electrically responsive to stimulation over time, mature synapses of excitable neurons, and activate photoreceptor lineage pathways. This work outlines a tunable method where the electrical function of electrically excitable, PSC-derived cells can be titrated with rGO fibers and light stimulation, and it suggests that repetitive light stimulation may provide a novel method for retinal cell differentiation in organoids.

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Interaction between stem cells and CNT@graphene oxide nanoribbon bilayer membrane with similar structure and different electrical conductivity.

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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.

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A transcriptomic overview of lung and liver changes one day after pulmonary exposure to graphene and graphene oxide

Project description:This study investigates transcriptomic differences in the lung and liver after pulmonary exposure to two Graphene based materials with similar physical properties, but different surface chemistry. Female C57BL/6 mouse were exposed by a single intratracheal instillation of 0, 18, 54 or 162 μg/mouse of graphene oxide (GO) or reduced graphene oxide (rGO). Pulmonary and hepatic transcriptional changes were compared to identify commonly and uniquely perturbed functions and pathways by GO and rGO. These changes were then related to previously analyzed endpoints. GO exposure induced more differentially expressed genes, affected more functions, and perturbed more pathways compared to rGO, both in the lung and liver.

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