PUBLICATION
The Effect of Fluence on Macrophage Kinetics, Oxidative Stress, and Wound Closure Using Real-Time In Vivo Imaging
- Authors
- Paredes, A.D., Benavidez, D., Cheng, J., Mangos, S., Patil, R., Donoghue, M., Benedetti, E., Bartholomew, A.
- ID
- ZDB-PUB-190507-28
- Date
- 2019
- Source
- Photobiomodulation, photomedicine, and laser surgery 37: 45-52 (Journal)
- Registered Authors
- Mangos, Steve
- Keywords
- He:Ne laser, macrophage, oxidative stress, time-lapse imaging, zebrafish
- MeSH Terms
-
- Animals
- Cell Movement/radiation effects
- Kinetics
- Low-Level Light Therapy/methods*
- Macrophages/radiation effects*
- Microscopy, Fluorescence
- Oxidative Stress/radiation effects*
- Wound Healing/radiation effects*
- Zebrafish
- PubMed
- 31050943 Full text @ Photobiomodul Photomed Laser Surg
Citation
Paredes, A.D., Benavidez, D., Cheng, J., Mangos, S., Patil, R., Donoghue, M., Benedetti, E., Bartholomew, A. (2019) The Effect of Fluence on Macrophage Kinetics, Oxidative Stress, and Wound Closure Using Real-Time In Vivo Imaging. Photobiomodulation, photomedicine, and laser surgery. 37:45-52.
Abstract
Objective: The aim of our study was to quantify the effect of doses delivered by a He:Ne laser on individual macrophage kinetics, tissue oxidative stress, and wound closure using real-time in vivo imaging. Background: Photobiomodulation has been reported to reduce tissue inflammation and accelerate wound closure; however, precise parameters of laser settings to optimize macrophage behavior have not been established. We hypothesized that quantitative and real-time in vivo imaging could identify optimal fluence for macrophage migration, reduction of reactive oxygen species, and acceleration of wound closure. Methods: Larval zebrafish Tg(mpeg-dendra2) were loaded with dihydroethidium for oxidative stress detection. Fish were caudal fin injured, treated with 635 nm continuous 5 mW He:Ne laser irradiation at 3, 9, or 18 J/cm2 and time-lapsed imaged within the first 120 min postinjury. Images taken 1 and 24-h postinjury were compared for percentage wound closure. Results: A fluence of 3 J/cm2 demonstrated significant increases in macrophage migration speed, fewer stops along the way, and greatest directed migration toward the wound. These findings were associated with a significant reduction in wound content reactive oxygen species when compared with control wounded fins. Both 3 and 9 J/cm2 significantly accelerated wound closure when compared with nonirradiated control fish. Conclusions: Wound macrophage activity could be manipulated by applied fluence, leading to reduced levels of wound reactive oxygen species and accelerated wound closure. The zebrafish model provides a means to quantitatively compare wound macrophage behavior in response to a variety of laser treatment parameters in real time.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping