31P NMR studies on recovery from hypoxia of human tumor cells
β Scribed by J. A. West-Jordan; A. Smith; S. Myint; J. A. Gardner; R. J. Abraham; R. H. T. Edwards; H. M. Warenius
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 251 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0740-3194
No coin nor oath required. For personal study only.
β¦ Synopsis
We describe the use of 31P NMR spectroscopy in the study of metabolic changes related to hypoxia in cultured human tumor cells in vitro. The 31P NMR spectrum can easily distinguish between metabolically active cells, metabolically inactive "dormant" cells, and necrotic cells. A crucial observation was that of the ability of the "dormant" cells to resume active metabolism on incubation with oxygen after long periods of hypoxia.
π SIMILAR VOLUMES
## Abstract ^31^P magic angle spinning NMR (MASβNMR) spectra were obtained from suspensions of human red blood cells (RBCs) that contained the cellβvolumeβsensitive probe molecule, dimethyl methylphosphonate (DMMP). A mathematical representation of the spectralβpeak shape, including the separation
The impact on tumor cell metabolism of a substantial reduction in cell proliferation rate without acute cytotoxicity was examined in cultured RIF-1 tumor cells following treatment with an antiproliferative steroid, dexamethasone (DEX). After 48 h exposure to 4 mM DEX, acute cell viability was essent
The effects of gossypol on glucose metabolism, ATP levels and intracellular sodium levels in murine TM3 Leydig and TM4 Sertoli cell lines were investigated, and their response compared. Relative ATP levels and sodium ion levels in the two cell lines were determined by 31P and "Na NMR spectroscopy. S
Inhibition of glycolysis by methionine is a phenomenon previously shown in transformed cells growing in culture. In a recent paper, [Collet V. et uL, Q. Mugn. Res. Biol. Med. 11,127-134 (1995)] we investigated this effect in vivo by 13C nuclear magnetic resonance spectroscopy, but the results did n