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- W8812596 abstract "Delivery of drugs through the skin and the buccal mucosa has been considered as an alternative to per oral dosing for those substances that are degraded in the gastro-intestinal tract, or are subject to first-pass metabolism in the liver. In the buccal mucosa, contrary to skin, the diffusion barriers are located within living cell layers, hence the physiological state of the tissue is likely to significantly affect in vitro diffusion profiles. In this study, we were interested in assessing the viability of excised buccal mucosa and determining the limits of tissue usage under common in vitro experimental conditions. Using confocal laser scanning microscopy (CLSM), we have shown that optical sectioning of samples exposed to calcein AM and ethidium homodimer-1 (used as `live' and `dead' cell probes respectively) can be employed to accurately and reliably determine the viability of buccal mucosa biopsies. The results of the CLSM assay were remarkably consistent with that of an MTT assay. In both studies, viability in PBS at 34°C was lost after about 8 h post-mortem, whereas it could be sustained for up to 24 h in KBR." @default.
- W8812596 created "2016-06-24" @default.
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- W8812596 date "1999-03-01" @default.
- W8812596 modified "2023-09-24" @default.
- W8812596 title "Buccal mucosa in vitro experiments" @default.
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- W8812596 doi "https://doi.org/10.1016/s0168-3659(98)00143-6" @default.
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