ABSTRACT: Artificial visible light is everywhere in our modern life. Our mode of social communication confronts us with screens of all kinds and their use is on the rise. People are therefore increasingly exposed to artificial visible light of which effects on skin are still largely poorly known. The purpose of this study was to model the artificial visible light emitted by electronic devices and subsequently assess the effect of such a light in normal human fibroblasts.
Project description:The expression profile of C. autoethanogenum DSM 10061 grown autotrophically with H2:CO:CO2 under visible light at an intensity of 4200 lux versus the expression profile of C. autoethanogenum DSM 10061 grown autotrophically in the dark
Project description:This study propose a novel visible-light crosslinking hydrogel bioink (termed GP) to fabricate injectable centimeter-scale architectures. Composed of GelMA with large molecular weight PEGDA, GP can form a reinforced dual-crosslinking network, presenting excellent superelasticity and stability, supporting injection pass nozzles with 1.5mm inner diameter after bioprinted as 15mm×15mm scale architectures. Moreover, when printing with living cells, even for sensitive cell lines like genome-edited cells, the transcriptome of cells after printing shows no difference, suggesting the high cell printing suitability of GP and the visible-light extrusion printing technique. The printed architectures can support long-term culture for at least 14 days, and GP provides cells with a biocompatible microenvironment, supporting cell survival, proliferation, and function maintenance.
Project description:The aim of this study is identifying potential signaling pathways involve with visible red light induced photoprotective effect against skin damage by UVB exposure, using transcriptomic analysis
Project description:Samples of 3D skin, irradiated using LED light and compared with un-exposed control, regarding one- and four-days of incubation. Three groups were simulating acute exposure: 1h, 2h and 4 hours whereas the 3D skin samples irradiated for 1 hour over four sequential days were simulating repeated exposure, for both blue wavelength and the full visible spectrum of digital light.
Project description:Unbiased SILAC-based proteomics of human and mouse cells exposed to non-ionizing electromagnetic fields (EMFs) such as those emitted by power-lines (ELF), mobile cellular systems (UMTS) and wireless networking devices (WiFi).
Project description:The biological functions of lipids largely depend on their chemicalspatial structures. The position and configuration of C=C bonds are two of the essential attributes that determine the structures of unsaturated lipids. However, simultaneous identification of both attributes remains challenging. Here, we developed a bifunctional visible-light-activated photocycloaddition-photoisomerization reaction system, which enabled the dual-resolving of the positional and geometric isomerism of C=C bonds in lipids when combined with liquid chromatographic mass spectrometry. The dual-pathway reaction mechanism was demonstrated by experiments and density functional theory calculations. Based on this bifunctional reaction system, a workflow of deep structural lipidomics was established, and allowed the revealing of unique patterns of cis-trans-isomers in bacteria, as well as the tracking of C=C positional isomers changes in mouse brain ischemia. This study not only offers a powerful tool for deep lipid structural biology, but also provides a new paradigm for developing the multifunctional visible-light-induced reaction.
Project description:Electronic cigarette use has increased dramatically over the past three years, despite numerous reports of acute lung injury and even death. In this report we provide evidence from a nonhuman primate model for Electronic Vapor-Induced Lung Injury (EVALI), demonstrating significant lung pathology from electronic vaping (EV). Here we characterized the particle size and pathogenic effects induced by EV exposure of nonhuman primates using the commercial nicotine JUUL® pod modular devices. Vaping aerosols appear to preferentially and exclusively target the bronchioles while bypassing larger bronchi. We demonstrate a significantly smaller particle size, generated by the EV device relative to combustion product aerosols produced by conventional cigarettes. Histopathologically, vaping aerosols appear to preferentially and exclusively target the bronchioles while bypassing larger bronchi which is consistent with a significanlty smaller particle size compared to cigarette smoke. Our immunohistochemical and RNAseq studies provide further evidence for severe small airway inflammation and dysregulation of gene expression within immune cells derived from bronchial lavage, respectively. Our findings raise major concerns regarding the safety of e-cigarettes, and provide a mechanism for the preferential induction of lung injury by EV. Our results, in a species whose lung architecture is the closest possible approximation of that of a human adolescent, suggest the danger of the EV device itself and resultant small particulate aerosols produced, preferentially entering and damaging a highly susceptible part of the respiratory system.