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Interindividual and regional relationship between cerebral blood flow and glucose metabolism in the resting brain.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Henriksen, Otto Mølby Vestergaard, Mark Bitsch Lindberg, Ulrich Aachmann-Andersen, Niels Jacob Lisbjerg, Kristian Christensen, Søren Just Rasmussen, Peter Kristian Olsen, Niels Vidiendal Forman, Julie L. Larsson, Henrik B. W. |
| Copyright Year | 2018 |
| Abstract | Studies of the resting brain measurements of cerebral blood flow (CBF) show large interindividual and regional variability, but the metabolic basis of this variability is not fully established. The aim of the present study was to reassess regional and interindividual relationships between cerebral perfusion and glucose metabolism in the resting brain. Regional quantitative measurements of CBF and cerebral metabolic rate of glucose (CMRglc) were obtained in 24 healthy young men using dynamic [15O]H2O and [18F]fluorodeoxyglucose positron emission tomography (PET). Magnetic resonance imaging measurements of global oxygen extraction fraction (gOEF) and metabolic rate of oxygen ([Formula: see text]) were obtained by combined susceptometry-based sagittal sinus oximetry and phase contrast mapping. No significant interindividual associations between global CBF, global CMRglc, and [Formula: see text] were observed. Linear mixed-model analysis showed a highly significant association of CBF with CMRglc regionally. Compared with neocortex significantly higher CBF values than explained by CMRglc were demonstrated in infratentorial structures, thalami, and mesial temporal cortex, and lower values were found in the striatum and cerebral white matter. The present study shows that absolute quantitative global CBF measurements appear not to be a valid surrogate measure of global cerebral glucose or oxygen consumption, and further demonstrates regionally variable relationship between perfusion and glucose metabolism in the resting brain that could suggest regional differences in energy substrate metabolism. NEW & NOTEWORTHY Using method-independent techniques the study cannot confirm direct interindividual correlations of absolute global values of perfusion with oxygen or glucose metabolism in the resting brain, and absolute global perfusion measurements appear not to be valid surrogate measures of cerebral metabolism. The ratio of both perfusion and oxygen delivery to glucose metabolism varies regionally, also when accounting for known methodological regional bias in quantification of glucose metabolism. |
| Starting Page | 1080 |
| Ending Page | 1089 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1152/japplphysiol.00276.2018 |
| PubMed reference number | 29975605 |
| Journal | Medline |
| Volume Number | 125 |
| Issue Number | 4 |
| Alternate Webpage(s) | https://www.physiology.org/doi/pdf/10.1152/japplphysiol.00276.2018 |
| Alternate Webpage(s) | https://doi.org/10.1152/japplphysiol.00276.2018 |
| Journal | Journal of applied physiology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
