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Monitoring wound healing of elastic cartilage using multiphoton microscopy
1Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China.
Objective:
To demonstrate the ability of multiphoton microscopy (MPM) for monitoring wound healing of elastic cartilage.
Method:
In a rabbit ear model, four cartilage specimen groups at 1-day, 1-, 4-, 20-week healing time points as well as a normal elastic cartilage were examined with MPM without using labeling agents. MPM images at wound margins were obtained from specimens at different healing stages, compared with the Hematoxylin and Eosin (H&E) stained images. Image analysis was performed to characterize the collagen morphology for quantifying the wound healing progression of elastic cartilage.
Results:
MPM provided high-resolution images of elastic cartilage at varying depths. Comparisons of the images of specimens at different healing stages show obvious cell growth and matrix deposition. The results are consistent with the histological results. Moreover, quantitative analysis results show significant alteration in the collagen cavity size or collagen orientation index during wound healing of elastic cartilage, indicating the possibility to act as indicators for monitoring wound healing.
Conclusion:
Our results suggested that MPM has the ability to monitor the wound healing progression of elastic cartilage, based on the visualization of cell growth and proliferation and quantitative characterization of collagen morphology during wound healing.
Insights
Multiphoton microscopy (MPM) effectively monitors elastic cartilage wound healing by visualizing cell growth and collagen changes. This technique offers a label-free method for assessing cartilage repair progression.
Area of Science:
- Biomedical imaging
- Cartilage biology
- Wound healing research
Background:
- Elastic cartilage wound healing is complex.
- Accurate monitoring methods are crucial for understanding repair.
- Multiphoton microscopy (MPM) offers potential for label-free imaging.
Purpose of the Study:
- To evaluate MPM's capability in monitoring elastic cartilage wound healing.
- To assess MPM's ability to visualize cellular and matrix changes during repair.
- To determine if MPM can quantify healing progression.
Main Methods:
- A rabbit ear model was used to study elastic cartilage wound healing.
- MPM was employed without labeling agents on specimens at various healing time points.
- MPM images were compared with Hematoxylin and Eosin (H&E) stained images.
- Image analysis focused on collagen morphology for quantification.
Main Results:
- MPM provided high-resolution, label-free images of elastic cartilage.
- MPM visualized cell growth and matrix deposition during healing.
- Quantitative analysis revealed significant changes in collagen cavity size and orientation.
- MPM results correlated well with histological findings.
Conclusions:
- MPM is a viable tool for monitoring elastic cartilage wound healing.
- Visualization of cell proliferation and collagen morphology are key indicators.
- MPM offers a quantitative approach to assess cartilage repair.
