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Current Medical Imaging

Author(s): Xiangmin Li, Yongxiang Tang, Zhengbin Yao, Shuo Hu, Hui Zhou, Xiaoye Mo, Changshou She, Xiaoqin Lu and Guoqing Huang*

DOI: 10.2174/1573405618666220321122214

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FDG-PET/CT Assessment of the Cerebral Protective Effects of Hydrogen in Rabbits with Cardiac Arrest

Article ID: e210322202459 Pages: 9

  • * (Excluding Mailing and Handling)

Abstract

Background: Anatomical imaging methods and histological examinations have limited clinical value for early monitoring of brain function damage after cardiac arrest (CA) in vivo.

Objective: We aimed to assess the cerebral protective effects of hydrogen in rabbits with CA by using fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT).

Methods: Male rabbits were divided into the hydrogen-treated (n=6), control (n=6), and sham (n=3) groups. Maximum standardized uptake values (SUVmax) were measured by FDG-PET/CT at baseline and post-resuscitation. Blood Ubiquitin C-terminal hydrolase-L1 (UCH-L1) and neuron-specific enolase (NSE) were measured before and after the operation. After surgical euthanasia, brain tissues were extracted for Nissl staining.

Results: SUVmax values first decreased at 2 and 24 h after resuscitation before rising in the hydrogentreated and control groups. SUVmax values in the frontal, occipital, and left temporal lobes and in the whole brain were significantly different between the hydrogen and control groups at 2 and 24 h postresuscitation (P<0.05). The neurological deficit scores at 24 and 48 h were lower in the hydrogentreated group (P<0.05). At 24 h, the serum UCH-L1 and NSE levels were increased in the hydrogen and control groups (P<0.05), but not in the sham group. At 48 and 72 h post-CA, the plasma UCH-L1 and NSE levels in the hydrogen and control groups gradually decreased. Neuronal damage was smaller in the hydrogen group compared to the control group at 72 h.

Conclusion: FDG-PET/CT could be used to monitor early cerebral damage, indicating a novel method for evaluating the protective effects of hydrogen on the brain after CA.

Keywords: Cardiopulmonary resuscitation, hydrogen, brain protection, FDG-PET/CT, UCH-L1, NSE.

Graphical Abstract

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