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Permeation of individual cryoprotectants and their different combinations into mouse liver tissue. | LitMetric
Development of successful tissue cryopreservation methods requires specific knowledge regarding tissue permeation of individual cryoprotective agents (CPAs) and their combinations. The present study assessed the permeation of dimethyl sulfoxide, ethylene glycol, and propylene glycol into liver tissue, and addressed whether the diffusion coefficient of individual CPAs changes when combining CPAs. To do this, mouse liver slices were exposed at room temperature to 3.5 mol/L concentrations of CPAs individually or in combination for 15, 30, 45, and 60 min. Subsequently, tissue CPA concentrations were determined using a gas chromatography/mass spectrometry (GC/MS) method. Our results show that (1) the GC/MS method allows measurement of multiple CPA concentrations in a single small tissue sample, (2) dimethyl sulfoxide has a higher diffusion coefficient than ethylene glycol and propylene glycol, and (3) the CPA diffusivity appears to decrease in mixtures with multiple CPAs. These findings may help the development of effective tissue cryopreservation methods.
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