Volume 85, Issue 4 pp. 1953-1961
FULL PAPER

Chemical exchange sensitive MRI of glucose uptake using xylose as a contrast agent

Jicheng Wang

Jicheng Wang

Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

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Mitsuhiro Fukuda

Mitsuhiro Fukuda

Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

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Julius Juhyun Chung

Julius Juhyun Chung

Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

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Ping Wang

Ping Wang

Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

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Tao Jin

Corresponding Author

Tao Jin

Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

Correspondence

Tao Jin, Department of Radiology, University of Pittsburgh, 3025 E Carson Street, Room 156, Pittsburgh, PA 15203, USA.

Email: [email protected]

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First published: 26 October 2020
Citations: 7

Funding information

National Institutes of Health; Grant Nos. NS100703 and EB003324

Abstract

Purpose

Glucose and its analogs can be detected by CEST and chemical exchange spin-lock (CESL) MRI techniques, but sensitivity is still a bottleneck for human applications. Here, CESL and CEST sensitivity and the effect of injection on baseline physiology were evaluated for a glucose analog, xylose.

Methods

The CEST and CESL sensitivity were evaluated at 9.4 T in phantoms and by in vivo rat experiments with 0.5 and 1 g/kg xylose injections. Arterial blood glucose level was sampled before and after 1 g/kg xylose injection. The effect of injection on baseline neuronal activity was measured by electrophysiology data during injections of saline, xylose, and 2-deoxy-D-glucose.

Results

In phantoms, xylose shows similar chemical exchange sensitivity and pH-dependence with that of glucose. In rat experiments with a bolus injection, CESL shows higher sensitivity in the detection of xylose than CEST, and the sensitivity of xylose is much higher than glucose. Injection of xylose does not significantly affect blood glucose level and baseline neural activity for 1-g/kg and 0.6-g/kg doses, respectively.

Conclusion

Due to its relatively high sensitivity and safety, xylose is a promising contrast agent for the study of glucose uptake.

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