What You Will Learn in This Chapter
Monitoring cells in 3D culture is a big challenge in cell biology and biomedical research. In this chapter, we will demonstrate the great potential of Raman trapping microscopy coupled with multivariate statistical analysis, to monitor individual cells in 2D cultures and 3D tissues. We shortly describe the concept of spontaneous Raman spectroscopy using a bio-compatible 785 nm laser and the advantages of combined Optical Trapping. Furthermore, you will learn how to extract the rich chemical information from the Raman spectra using a unique Raman data analyzing software dedicated to biomedical needs. We show that Raman allows to monitor composition, functionality and quality of keratinocytes and fibroblasts during production as well as within the final graft. Furthermore, Raman allows to observe cell vitality within microspheres of mouse embryonic stem cells giving the potential to monitor drug penetration.
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Further Reading
Chapter (Raman Trapping Microscopy for Non-invasive Analysis of Biological Samples). Animal cell biotechnology: methods and protocols, methods in molecular biology. Cham: Springer; 2020.
Steinke M, Gross R, Walles H, et al. An engineered 3D human airway mucosa model based on an SIS scaffold. Biomaterials. 2014;35:7355–62.
Charwat V, Schütze K, Holnthoner W, et al. Potential and limitations of microscopy and Raman spectroscopy for live-cell analysis of 3D cell cultures. J Biotechnol. 2015;205:70–81.
Pudlas M, Koch S, Bolwien C, Walles H. Raman spectroscopy as a tool for quality and sterility analysis for tissue engineering applications like cartilage transplants. Int J Artif Organs. 2010;33:228–37.
Acknowledgement
We would like to thank Prof. Dr. Ernst Reichmann, TBRU (University-Children’s Hospital Zürich, Switzerland) as well as Dr. Daniela Marino CUTISS AG (Zürich, Switzerland) for providing the skin cell samples. We would like also to thank Sarvesh Ghorpade, Dr. Heidi Kremling and Florian Zunhammer for their assistance. We thank also Dr. Ali Mirsaidi and Dr. Patrick Kugelmeier from Kugelmeiers Ltd. (Erlenbach, Switzerland) for providing the microspheres and for their great support.
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Yosef, H.K., Schütze, K. (2021). Non-Destructive and Label-Free Monitoring of 3D Cell Constructs. In: Kasper, C., Egger, D., Lavrentieva, A. (eds) Basic Concepts on 3D Cell Culture . Learning Materials in Biosciences. Springer, Cham. https://doi.org/10.1007/978-3-030-66749-8_10
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