Effect of nanosecond pulsed electric field (nsPEF) on gene expression in TM3 Leydig cells
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE155355 | GEO | 2021/10/20
REPOSITORIES: GEO
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Project description:We use a human whole genome microarray to analyze the effects of nanosecond pulsed electric fields on Jurkat cells with the focus on early response genes to DNA damage. Keywords: nanosecond pulsed electric fields, jurkat cells, DNA damage
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Project description:Effect of nanosecond pulsed electric field (nsPEF) on gene expression in TM3 Leydig cells
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Project description:<p>Nanosecond pulsed electric field (nsPEF) is a novel ablation technique that based on high-intensity electric voltage to achieve tumor-killing effect in the target region, and increasingly considered for treating tumours of the liver, kidneys, and other organs with rich blood supply. When we were looking at the safety and feasibility of applying nsPEF on porcine livers, we found that the indicators of liver function after ablation fluctuated. To further study the influence of this technique in the treatment of liver, we collected serum and fecal specimens of the pigs pre-treatment and post-treatment. The gut microbiota of pigs was sequenced by Illumina Miseq platform for analyzing the diversity and alterations of gut microbiota. Liquid chromatography-mass spectrometry (LC-MS) based metabonomic analysis and Pearson coefficient method were also used to construct the interaction system of different metabolites, metabolic pathways and flora. </p>
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Project description:Catheter ablation is an effective treatment to prevent recurrence of Atrial fibrillation (AF) and can be used to maintain sinus rhythm and improve symptoms of AF, but to some extent it can cause a range of adverse effects associated with catheter ablation. Pulsed electric field is a newer treatment modality to replace catheter ablation for atrial fibrillation due to its fewer side effects. Different from radiofrequency ablation, which destroys diseased myocardial tissue by thermal energy, pulsed electric field ablation achieves the purpose of atrial fibrillation ablation by inducing damage to diseased myocardial cells through irreversible electroporation. However, some experimental parameters and mechanism of pulsed electric fields remain unclear.
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Project description:This study was designed to investigate the toxicological effects of MEHP on TM3 Leydig and TM4 Sertoli cells.
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Project description:In the last few years, pulsed electric fields have emerged as promising clinical tools for tumor treatments. This study highlights the distinct impact of a specific pulsed electric field protocol named PEF-5 (0.3 MV/m, 40 µs, 5 pulses) on astrocytes (NHA), medulloblastoma (D283) and gli-oblastoma (U87 NS) cancer stem-like cells. We pursued this goal performing ultrastructural analyses corroborated by molecular/omics approaches to understand the vulnerability or re-sistance mechanisms triggered by PEF-5 exposure in the different cell types. Electron microscopic analyses showed that, independently of exposed cells, the main targets of PEF-5 were the cell membrane and the cytoskeleton, presenting indiscriminate filopodia disappearance on the cell surface accompanied by a rapid cell swelling. Nevertheless, cells activated different responses stemming from intracellular organelles. NHA triggered a protective mechanism to recover from the damaged membranes and eliminated the detrimental ROS to maintain cell vital functions. Conversely, PEF-5 induced a different action on mitochondria of cancer stem-like cells, more prominent on D283 compared to U87 NS cells, in correlation with a higher basal level of CD133 protein in D283 cells. In this case, a complete mitochondrial dysfunction was demonstrated, inhibiting the recovery of D283 vital processes, while a mild perturbation was observed in mito-chondria of U87 NS cells, not sufficient to impair their cell functions. Altogether, these results suggest the possibility to use PEF-based technology as a novel strategy to target selectively mi-tochondria of CSCs, preserving healthy cells. Ultrastructural analysis, supported by transcriptomic characterization in microsecond pulsed electric field exposed normal brain and brain tumor cells
2024-03-06 | GSE248600 | GEO
Project description:In the last few years, pulsed electric fields have emerged as promising clinical tools for tumor treatments. This study highlights the distinct impact of a specific pulsed electric field protocol named PEF-5 (0.3 MV/m, 40 µs, 5 pulses) on astrocytes (NHA), medulloblastoma (D283) and gli-oblastoma (U87 NS) cancer stem-like cells. We pursued this goal performing ultrastructural analyses corroborated by molecular/omics approaches to understand the vulnerability or re-sistance mechanisms triggered by PEF-5 exposure in the different cell types. Electron microscopic analyses showed that, independently of exposed cells, the main targets of PEF-5 were the cell membrane and the cytoskeleton, presenting indiscriminate filopodia disappearance on the cell surface accompanied by a rapid cell swelling. Nevertheless, cells activated different responses stemming from intracellular organelles. NHA triggered a protective mechanism to recover from the damaged membranes and eliminated the detrimental ROS to maintain cell vital functions. Conversely, PEF-5 induced a different action on mitochondria of cancer stem-like cells, more prominent on D283 compared to U87 NS cells, in correlation with a higher basal level of CD133 protein in D283 cells. In this case, a complete mitochondrial dysfunction was demonstrated, inhibiting the recovery of D283 vital processes, while a mild perturbation was observed in mito-chondria of U87 NS cells, not sufficient to impair their cell functions. Altogether, these results suggest the possibility to use PEF-based technology as a novel strategy to target selectively mi-tochondria of CSCs, preserving healthy cells. Ultrastructural analysis, supported by transcriptomic characterization in microsecond pulsed electric field exposed normal brain and brain tumor cells.
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Project description:Low-intensity electric fields can induce changes in cell differentiation and cytoskeletal stresses that facilitate manipulation of osteoblasts and mesenchymal stem cells; however, the application times (tens of minutes) are of the order of physiological mechanisms, which can complicate treatment consistency. Intense nanosecond pulsed electric fields (nsPEFs) can overcome these challenges by inducing similar stresses on shorter timescales while additionally inducing plasma membrane nanoporation, ion transport and intracellular structure manipulation. This paper shows that treating myoblasts and osteoblasts with five 300 ns PEFs with intensities from 1.5 to 25 kV cm-1 increased proliferation and differentiation. While nsPEFs above 5 kV cm-1 decreased myoblast population growth, 10 and 20 kV cm-1 trains increased myoblast population by approximately fivefold 48 h after exposure when all cell densities were set to the same level after exposure. Three trials of the PEF-treated osteoblasts showed that PEF trains between 2.5 and 10 kV cm-1 induced the greatest population growth compared to the control 48 h after treatment. Trains of nsPEFs between 1.5 and 5 kV cm-1 induced the most nodule formation in osteoblasts, indicating bone formation. These results demonstrate the potential utility for nsPEFs to rapidly modulate stem cells for proliferation and differentiation and motivate future experiments to optimize PEF parameters for in vivo applications.
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Project description:Recently, nanosecond pulsed electric field (nsPEF) has been considered as a new tool for tumor therapy, but its molecular mechanism of function remains to be fully elucidated. Here, we explored the cellular processes of Jurkat cells exposed to nanosecond pulsed electric field. Differentially expressed genes (DEGs) were acquired from the GEO2R, followed by analysis with a series of bioinformatics tools. Subsequently, 3D protein models of hub genes were modeled by Modeller 9.21 and Rosetta 3.9. Then, a 100 ns molecular dynamics simulation for each hub protein was performed with GROMACS 2018.2. Finally, three kinds of nsPEF voltages (0.01, 0.05, and 0.5 mV/mm) were used to simulate the molecular dynamics of hub proteins for 100 ns. A total of 1769 DEGs and eight hub genes were obtained. Molecular dynamic analysis, including root mean square deviation (RMSD), root mean square fluctuation (RMSF), and the Rg, demonstrated that the 3D structure of hub proteins was built, and the structural characteristics of hub proteins under different nsPEFs were acquired. In conclusion, we explored the effect of nsPEF on Jurkat cell signaling pathway from the perspective of molecular informatics, which will be helpful in understanding the complex effects of nsPEF on acute T-cell leukemia Jurkat cells.
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Project description:Effects of Ultra-short Pulsed Electric Fields exposure on Glioblastoma Cells
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