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- W2168392325 abstract "Diffusion of intracellular water was measured in perfused cells embedded in basement membrane gel threads. F98 glioma cells, primary astrocytes, and epithelial KB cells were used and were exposed to osmotic stress, immunosuppressiva, the water channel blocker p -chloromercuriobenzenesulfonate (p CMBS), and apoptotic conditions. With diffusion-weighted 1 H NMR spectroscopy changes in the intracellular signal could be monitored and quantified with single signal (ss ), constant diffusion time (ct ), and constant gradient strength (cg ) experiments. The temporal resolution of the ss monitoring was 3.5 s with a standard deviation of 0.5% of the signal intensity and 32 s (3%) with ct monitoring, respectively. A mean intracellular residence time of water was determined with the cg experiment to about 50 ms. Changes of this exchange time from (51.9 ± 1.0) to (59.0 ± 1.1) ms were observed during treatment with p CMBS. The changes in the diffusion attenuated signal could be simulated analytically varying the intracellular volume fraction and exchange time by combination of restricted diffusion (Tanner model) and water exchange (Kärger model). This sensitive and noninvasive NMR method on perfused cells allows to determine changes in the intracellular volume and residence time in a simple and accurate manner. Many further applications as anoxia, volume regulation, ischemia and treatment with various pharmaceuticals are conceiveable to follow up their effect on the cell volume and the exchange time of intracellular water. © 1998 John Wiley & Sons, Ltd." @default.
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- W2168392325 date "1998-02-01" @default.
- W2168392325 modified "2023-10-16" @default.
- W2168392325 title "Monitoring of cell volume and water exchange time in perfused cells by diffusion-weighted1H NMR spectroscopy" @default.
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- W2168392325 doi "https://doi.org/10.1002/(sici)1099-1492(199802)11:1<11::aid-nbm498>3.0.co;2-e" @default.
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