Abstract
We have previously reported the protective effects of blue light-emitting diode (BLED)–stimulated cell metabolites on cell injury. To further examine the effect of conditioned media (CM) derived from BLED (5 J/cm2)-exposed human normal fibroblasts (CMBL5) for clinical application, we have used the choline chloride and phenol red–free media and then concentrated CMBL5 using a centrifugal filter unit. The collected CMBL5-lower part (CMBL5-LO) has evaluated the inflammatory protein expression profile in LPS-stimulated RAW264.7 cells. Comprehensive metabolomic profiling of CMBL5-LO was carried out using hybrid tandem mass spectrometry. Treatment with CMBL5-LO showed the cytoprotective effect on apoptotic cell death, but rather increased apoptotic cells after treatment with CMBL5-upper part (CMBL5-UP). In addition, CMBL5-LO inhibited several chemo-attractants, including interleukin (IL)-6, macrophage inflammatory protein (MIP)-2, chemokine (C-C motif) ligand 5 (CCL5), granulocyte colony-stimulating factor (GCSF), and monocyte chemoattractant protein-1 (MCP-1) expression. Pro-inflammatory nitric oxide was decreased after CMBL5-LO treatment, but not by CMBL5-UP treatment. Interestingly, treatment with CMBL5-LO stimulated expression of heme oxygenase-1, indicating its anti-inflammatory property. Most endoplasmic reticulum (ER) stress proteins except for transcription factor C/EBP homologous protein (CHOP) were highly expressed after irradiation with BLED in cells. Further studies are needed to examine the precise mechanism by CMBL5-LO in cells.
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Abbreviations
- BLED :
-
blue light-emitting diode
- CCL5 :
-
chemokine (C-C motif) ligand 5
- CHOP :
-
transcription factor C/EBP homologous protein
- CM :
-
conditioned medium
- CMBL5 :
-
conditioned medium derived from BLED (5 J/cm2)–irradiated cells
- CMBL5-LO :
-
CMBL5-lower part
- CMBL5-UP :
-
CMBL5-upper part
- DMEM :
-
Dulbecco’s modified Eagle medium
- ER :
-
endoplasmic reticulum
- ERK :
-
phospho-extracellular signal–regulated kinase
- GCSF :
-
granulocyte colony-stimulating factor
- HEPES :
-
hydroxyethyl piperazine ethane sulfonic acid
- HMDB :
-
Human Metabolome Database
- HO-1 :
-
heme oxygenase-1
- IL-6 :
-
interleukin-6
- IMDM :
-
Iscove’s modified Dulbecco’s medium
- iNOS :
-
inducible nitric oxide synthase
- IRE1α :
-
inositol-requiring 1α
- LPS :
-
lipopolysaccharide
- MAPK :
-
mitogen-activated protein kinase
- MCP-1 :
-
monocyte chemoattractant protein-1
- MIP-2 :
-
macrophage inflammatory protein-2
- NO :
-
nitric oxide
- OPLS-DA :
-
orthogonal projections to latent structures discriminant analysis
- PCA :
-
principal component analysis
- PDI :
-
protein disulfide isomerase
- PERK :
-
pancreatic ER kinase
- RLED :
-
red light-emitting diode
- SFM :
-
serum-free media
- UPLC :
-
ultra-performance liquid chromatography
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This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03932595) and grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare (HI15C1529).
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Oh, PS., Kim, EM., Lim, S. et al. Conditioned media from blue light-emitting diode–exposed fibroblasts have an anti-inflammatory effect in vitro. Lasers Med Sci 36, 99–109 (2021). https://doi.org/10.1007/s10103-020-03018-x
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DOI: https://doi.org/10.1007/s10103-020-03018-x