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571.
Uncoupling effect of fatty acids on heart muscle mitochondria and submitochondrial particles. 总被引:1,自引:0,他引:1
V I Dedukhova E N Mokhova V P Skulachev A A Starkov E Arrigoni-Martelli V A Bobyleva 《FEBS letters》1991,295(1-3):51-54
The effect of ATP/ADP-antiporter inhibitors on palmitate-induced uncoupling was studied in heart muscle mitochondria and inside-out submitochondrial particles. In both systems palmitate is found to decrease the respiration-generated membrane potential. In mitochondria, this effect is specifically abolished by carboxyatractylate (CAtr) a non-penetrating inhibitor of antiporter. In submitochondrial particles, CAtr does not abolish the palmitate-induced potential decrease. At the same time, bongkrekic acid, a penetrating inhibitor of the antiporter, suppresses the palmitate effect on the potential both in mitochondria and particles. Palmitoyl-CoA which is known to inhibit the antiporter in mitochondria as well as in particles decreases the palmitate uncoupling efficiency in both these systems. These data are in agreement with the hypothesis that the ATP/ADP-antiporter is involved in the action of free fatty acids as natural uncouplers of oxidative phosphorylation. 相似文献
572.
Walker James C.; Kurtz Daniel B.; Shore F.Mitchell; Ogden Michael W.; Reynolds John H. IV 《Chemical senses》1990,15(2):165-177
An automated system for the measurement of the psychophysicaland physiological responses of humans to odorant stimulationof the nose and eyes is described. All aspects of the generationand production of odor stimuli, the recording of physiologicaland psychophysical responses of the subjects and the storageof data are managed by an Apple He computer. Both the nasaland ocular olfactometers are based on electronic mass flow controllerswhich are used to control the ratios of volume flow rates ofclean and odorant-saturated air. The output of each olfactometeris measured by a photo-ionization detector. Odor stimuli aredelivered to custom-fitted face masks, that allow separate stimulationof the nose and eyes, through Teflon (rtm) flow valves. A videocamera records the responses of the eyes and a pneumotachograph,in combination with a pressure transducer, records changes inrespiratory behavior. An electronic mouse is used to enter thesubject's psychophysical responses directly into the computer.The advantages of this methodology and its current and potentialapplications are discussed. 相似文献