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  • 1.
    Huynh, Xandra
    Malmö University, Faculty of Health and Society (HS), Department of Biomedical Science (BMV).
    EFFECT OF NIACINAMIDE AND DEXPANTHENOL ON CELL VIABILITY AND GENE EXPRESSION IN KERATINOCYTES2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Vitamin B3 (niacinamide) and Vitamin B5 (dexpanthenol) are commonly used in skincare to enhance skin barrier formation, but there are currently not many studies about their effect on gene expression. This study investigated the viability of keratinocytes at different cell concentration limits (i.e., cell death). Based on the results, the cells were treated with the vitamins with the selected concentrations 1 mM and 10 mM. After the cells were treated with vitamins for 6 h, and 24 h, qPCR was employed to investigate the effects of these substances on the expression of differentiation markers, which are related to the formation of protein and lipid components required during skin barrier formation. The selected genes are related to the synthesis of filaggrin, NIPAL-4, ELOVL-4, STS, and ALOXE-3. The results showed an increase in viability at lower concentrations in cells treated with vitamins. A downregulation of filaggrin and NIPAL4 after treatment with niacinamide for 6 h and an increase of ELOVL-4 at 24h can be observed. After 6 h of incubation with dexpanthenol added, there was also a slight increase of ALOXE-3, which was more prominent upregulated at 24h. In conclusion, the vitamins seemed to increase cell viability in association with increased proliferation. This study also presented what genes were up and downregulated after treating cells with vitamins and attempted to explain how it could be interpreted.   

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