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Using a Multimodal Near-infrared Spectroscopy and MRI to Quantify Gray Matter Metabolic Rate for Oxygen: A Hypothermia Validation Study

Overview
Journal Neuroimage
Specialty Radiology
Date 2019 Nov 1
PMID 31669409
Citations 13
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Abstract

Non-invasive quantitative imaging of cerebral oxygen metabolism (CMRO) in small animal models is crucial to understand the role of oxidative metabolism in healthy and diseased brains. In this study, we developed a multimodal method combining near-infrared spectroscopy (NIRS) and MRI to non-invasively study oxygen delivery and consumption in the cortex of mouse and rat models. The term CASNIRS is proposed to the technique that measures CMRO with ASL and NIRS. To determine the reliability of this method, CMRO values were compared with reported values measured with other techniques. Also, the sensitivity of the CASNIRS technique to detect changes in CMRO in the cortex of the animals was assessed by applying a reduction in core temperature, which is known to reduce CMRO. Cerebral blood flow (CBF) and CMRO were measured in five mice and five rats at a core temperature of 37 °C followed by another measurement at 33 °C. CMRO was 7.8 ± 1.8 and 3.7 ± 0.9 (ml/100 g/min, mean ± SD) in mice and rats respectively. These values are in good agreement with reported values measured by O PET, O NMR, and BOLD fMRI. In hypothermia, we detected a significant decrease of 37% and 32% in CMRO in the cortex of mice and rats, respectively. Q10 was calculated to be 3.2 in mice and 2.7 in rats. In this study we showed that it is possible to assess absolute values of metabolic correlates such as CMRO, CBF and oxygen extraction fraction (OEF) noninvasively in living brain of mice and rats by combining NIRS with MRI. This will open new possibilities for studying brain metabolism in patients as well as the many mouse/rat models of brain disorders.

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References
1.
Yang R, Dunn J . Reduced cortical microvascular oxygenation in multiple sclerosis: a blinded, case-controlled study using a novel quantitative near-infrared spectroscopy method. Sci Rep. 2015; 5:16477. PMC: 4643232. DOI: 10.1038/srep16477. View

2.
Hyder F, Kida I, Behar K, Kennan R, Maciejewski P, Rothman D . Quantitative functional imaging of the brain: towards mapping neuronal activity by BOLD fMRI. NMR Biomed. 2001; 14(7-8):413-31. DOI: 10.1002/nbm.733. View

3.
Buxton R . Quantifying CBF with arterial spin labeling. J Magn Reson Imaging. 2005; 22(6):723-6. DOI: 10.1002/jmri.20462. View

4.
Lou S, Lepak V, Eberly L, Roth B, Cui W, Zhu X . Oxygen consumption deficit in Huntington disease mouse brain under metabolic stress. Hum Mol Genet. 2016; 25(13):2813-2826. PMC: 5181641. DOI: 10.1093/hmg/ddw138. View

5.
Mintun M, Raichle M, Martin W, Herscovitch P . Brain oxygen utilization measured with O-15 radiotracers and positron emission tomography. J Nucl Med. 1984; 25(2):177-87. View