Abstract
The skin is the largest organ that protects the body from the outside and is subjected to constant physical stimulation, such as stretching. Although many studies currently focus on UV radiation and skin aging, few studies have been reported on the effects of excessive physical stimulation on the skin. We have developed a magnetic stretching skin-on-chip (MSSC) with a built-in electromagnet to apply magnetic field-based tensile stimulation. According to the 12-h cycle circadian locomotor output cycles kaput (CLOCK) gene expression, 5% tensile stimulation was added at 0.01 Hz for 12 h per day. Physical stress was applied during the 28 days of the skin regeneration cycle, and the tissue morphological changes, protein expression, and gene expression of skin equivalents were compared to previous study results of compressive stimulation (opposite mode of tensile) to confirm the effects. Comprehensively report the skin reaction depending on the type of stimulation. The expression of genes related to the epidermal barrier showed a similar tendency for both stimulation in the case of filaggrin, but the opposite tendency appeared for involucrin and keratin 10. The proteins that make up the dermis and epidermis also showed opposite trends in expression.
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Acknowledgements
This work was supported by the national Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (NRF-2020R1A2C2009928), Republic of Korea, and the Technology Innovation Program (or Industrial Strategic Technology Development Program-3D Organ-on-a-Chip-Based new Drug Development Platform Construction Project) (20008414, Development of intestine–liver–kidney multiorgan tissue chip mimicking absorption, distribution, metabolism, excretion of drug) funded By the Ministry of Trade, Industry and Energy(MOTIE, Korea).
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Kim, K., Jeong, S. & Sung, G.Y. Effect of Periodical Tensile Stimulation on the Human Skin Equivalents by Magnetic Stretching Skin-on-a-Chip (MSSC). BioChip J 16, 501–514 (2022). https://doi.org/10.1007/s13206-022-00092-x
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DOI: https://doi.org/10.1007/s13206-022-00092-x