Effects of oxygen saturation and pCO2 on brain uptake of glucose analogues in rabbits

Stroke; a Journal of Cerebral Circulation
F G BersonI Klatzo

Abstract

The effect of oxygen saturation and PCO2 on brain uptake of glucose analogues was studied in rabbits. Using a modified Oldendorf technique, 14C-labeled glucose analogues with a 3H2O reference standard were introduced into the cerebral circulation via the common carotid artery, and the radioactivity of the ipsilateral cerebral cortex was counted and expressed in terms of a brain uptake index (BUI). Severe hypoxia (oxygen saturation less than or equal to 18%) resulted in approximately a 40% decrease in the BUI of 2-deoxy-D-glucose and a 45% decrease in the BUI of 3-0-methyl-D-glucose. Severe hypercapnia (PCO2 = 100 mm Hg) caused a 45% decrease in the BUI of both of these glucose analogues. Hypercapnia superimposed on severe hypoxia had no additional effect. Hypocapnia (PCO2 = 15 mm Hg) increased the BUI of 3-0-methyl-D-glucose by 35% of the control value, and this increase was extremely sensitive to competitive inhibition. When BUI values were plotted against pH rather than PCO2 for the same experiments, there was a good correlation with the calculated linear regression. These results are compared with previous findings on pathologically induced changes in brain uptake of glucose analogues, and the possible role of blood flow is ...Continue Reading

References

Mar 1, 1975·The American Journal of Physiology·A L BetzL R Drewes
Mar 25, 1975·Biochimica Et Biophysica Acta·W M Pardridge, W H Oldendorf
Apr 1, 1974·Archives of Neurology·M E RaichleR L Grubb
Dec 1, 1971·The American Journal of Physiology·W H Oldendorf
Nov 1, 1965·The Journal of Physiology·C Crone
Jan 1, 1965·Acta Physiologica Scandinavica. Supplementum·E Häggendal, B Johansson
Jan 1, 1959·Pflügers Archiv : European journal of physiology·H BARTELS, H HARMS

Citations

Jan 1, 1977·Journal of Neurochemistry·W M Pardridge, W H Oldendorf
Mar 17, 2010·Critical Care Medicine·Gerard CurleyJohn G Laffey
Jun 1, 1983·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·A L BetzJ T Hoff
Feb 16, 2021·Frontiers in Neurology·Elisa Gouvea BogossianFabio Silvio Taccone

Related Concepts

Metazoa
Anoxemia
Diastolic Blood Pressure
Blood - Brain Barrier Anatomy
Carbon Dioxide
Insula of Reil
Anhydrous Dextrose
Hydrogen-Ion Concentration
Hypercapnia
Dioxygen

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