Related Experiment Video
Updated: Oct 29, 2025
Author Spotlight: Innovative Laser Techniques for Hoechst Staining to Analyze Side Population Cells
Published on: August 23, 2024
Innovative finding of 266-nm laser regulating CD90 levels in SDSCs
Ray-Ling Hsiao1,2, Yen-Chung Chen3, Mei-Yue Huang3,4
1Ph.D. Program for Cancer Biology and Drug Discovery, China Medical University and Academia Sinica, Taichung, Taiwan, ROC. rayling.hsiao@msa.hinet.net.
Abstract:
We used light to irradiate skin-derived stem cells and tried to find any cellular protein alterations 24 h after illumination. A 266-nm laser with four intensities was used, and of the nine cell markers that were surveyed in our trials, only CD90 was downregulated at an intensity of 20 μJ for 10 s. Repeated illuminations from the 266-nm laser at seven intensities revealed that CD90 expression was downregulated 14.6-28.8%, depending on light intensity. The maximal effect was noted at an intensity of 30 μJ for 2 s. This innovative finding reveals that a 266-nm laser can regulate protein expression in skin-derivative stem cells.
Insights
Researchers found that irradiating skin-derived stem cells with a 266-nm laser can alter protein expression. Specifically, CD90 protein levels were reduced, demonstrating a novel method for regulating stem cell characteristics.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Dermatology
Background:
- Stem cells are crucial for tissue regeneration and repair.
- Understanding how external stimuli affect stem cell protein expression is vital for therapeutic applications.
- Previous research has explored various methods to modulate stem cell behavior.
Purpose of the Study:
- To investigate the effects of 266-nm laser irradiation on protein expression in skin-derived stem cells.
- To identify specific cellular protein alterations following light exposure.
- To determine the optimal laser parameters for modulating protein expression.
Main Methods:
- Skin-derived stem cells were irradiated using a 266-nm laser at varying intensities and durations.
- Cellular protein alterations were analyzed 24 hours post-illumination.
- Expression levels of nine cell markers were quantified, with a focus on CD90.
Main Results:
- A single 266-nm laser irradiation at 20 μJ for 10 s downregulated CD90 expression.
- Repeated irradiations at different intensities resulted in CD90 downregulation ranging from 14.6% to 28.8%.
- The maximal downregulation of CD90 was observed at an intensity of 30 μJ for 2 s.
Conclusions:
- 266-nm laser irradiation can effectively regulate protein expression in skin-derived stem cells.
- CD90 downregulation is a key cellular response to specific 266-nm laser parameters.
- This finding presents a novel photobiomodulation approach for controlling stem cell characteristics.
