Near-Infrared Irradiation Affects Lipid Metabolism in Neuronal Cells, Inducing Lipid Droplets Formation.
Svitlana M LevchenkoAndrey N KuzminTymish Y OhulchanskyyArtem M PlissJunle QuParas N PrasadPublished in: ACS chemical neuroscience (2018)
It is known that lipids play an outstanding role in cellular regulation, and their dysfunction has been linked to many diseases. Thus, modulation of lipid metabolism may provide new pathways for disease treatment or prevention. In this work, near-infrared (NIR) light was applied to modulate lipid metabolism and increase intracellular lipid content in rat cortical neurons (RCN). Using label-free CARS microscopy, we have monitored the intracellular lipid content in RCN at a single-cell level. A major increase in average level of lipid per cell after treatment with laser diode at 808 nm was found, nonlinearly dependent on the irradiation dose. Moreover, a striking formation of lipid droplets (LDs) in the irradiated RCN was discovered. Further experiments and analysis reveal a strong correlation between NIR light induced generation of reactive oxygen species (ROS), lipids level, and LDs formation in RCN. Our findings can contribute to a development of therapeutic approaches for neurological disorders via NIR light control of lipid metabolism in neuronal cells.
Keyphrases
- fatty acid
- reactive oxygen species
- single cell
- label free
- induced apoptosis
- photodynamic therapy
- cell cycle arrest
- oxidative stress
- rna seq
- cell death
- drug release
- fluorescence imaging
- endoplasmic reticulum stress
- signaling pathway
- radiation induced
- dna damage
- spinal cord injury
- high speed
- single molecule
- smoking cessation
- cell therapy
- gene expression
- brain injury
- subarachnoid hemorrhage
- genome wide
- cell proliferation
- optical coherence tomography
- mass spectrometry