Dynamic observation and quantification of type I/II collagen in chondrogenesis of mesenchymal stem cells by second‐order susceptibility microscopy

• Published in: Journal of biophotonics 2019-02, Vol.12 (2), p.e201800097-n/a
• Main Authors: Hsueh, Chiu‐Mei, Lin, Hung‐Ming, Tseng, Te‐Yu, Huang, Yao‐De, Lee, Hsuan‐Shu, Dong, Chen‐Yuan
• Format: Article
• Language: English
• Subjects: Chondrogenesis; Collagen; Collagen (type I); Collagen (type II); Collagen Type I - metabolism; Collagen Type II - metabolism; differentiation; Extracellular matrix; Humans; Mesenchymal stem cells; Mesenchymal Stem Cells - cytology; Mesenchymal Stem Cells - metabolism; Mesenchyme; Microscopy; Quality control; second‐order susceptibility microscopy; Stem cells; Tensors; Tissue engineering; Tissues
• ISSN: 1864-063X; 1864-0648
• DOI: 10.1002/jbio.201800097

Second‐order susceptibility (SOS) microscopy is used to image and characterize chondrogenesis in cultured human mesenchymal stem cells. SOS analysis shows that the SOS tensor ratios can be used to characterize type I and II collagens in living tissues and that both collagen types are produced at the onset of chondrogenesis. Time‐lapse analysis shows a modulation of extracellular matrix results in a higher rate in increase of type II collagen, as compared to type I collagen. With time, type II collagen content stabilizes at the composition of 70% of total collagen content. SOS microscopy can be used to continuously and noninvasively monitor the production of collagens I and II. With additional development, this technique can be developed into an effective quality control tool for monitoring extracellular matrix production in engineered tissues. Second‐order susceptibility (SOS) microscopy is used to image and characterize chondrogenesis in cultured human mesenchymal stem cells. Without extrinsic labeling, SOS tensor ratios analysis can be used to quantify the production of type I/II collagens continuously and noninvasively in living tissues. This technique can be developed into an effective quality control tool for monitoring extracellular matrix production in engineered tissues.