<sup>18</sup>F‑fluorodeoxyglucose positron emission tomography for the detection of inflammatory lesions of the arterial vessel walls in Wistar rats

Shen,Shiwei; Li,Hongwei; Ge,Song; Huang,Hongbo; Zhang,Hui; Li,Feng; Feng,Yinbo; Wang,Ling; Weng,Xiaofeng; Lu,Yun; Shen,Zhenhai

doi:10.3892/etm.2021.9801

April-2021 Volume 21 Issue 4

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April-2021 Volume 21 Issue 4

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Article Open Access

¹⁸F‑fluorodeoxyglucose positron emission tomography for the detection of inflammatory lesions of the arterial vessel walls in Wistar rats

Authors:
- Shiwei Shen
- Hongwei Li
- Song Ge
- Hongbo Huang
- Hui Zhang
- Feng Li
- Yinbo Feng
- Ling Wang
- Xiaofeng Weng
- Yun Lu
- Zhenhai Shen
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Affiliations: Department of Endocrinology, Wuxi No. 2 People's Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214002, P.R. China, Department of Rehabilitation, Jiangsu Provincial Research Center for Health Assessment and Intervention, Jiangsu Provincial Taihu Sanatorium, Wuxi, Jiangsu 214086, P.R. China, Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China, Micro PET Center, Jiangsu Institution of Nuclear Medicine, Wuxi, Jiangsu 214063, P.R. China, Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China, Internal Medicine, Jiangsu Provincial Research Center for Health Assessment and Intervention, Jiangsu Provincial Taihu Sanatorium, Wuxi, Jiangsu 214086, P.R. China, Department of Radiology, Jiangsu Provincial Research Center for Health Assessment and Intervention, Jiangsu Provincial Taihu Sanatorium, Wuxi, Jiangsu 214086, P.R. China, Clinical Laboratory, Jiangsu Provincial Research Center for Health Assessment and Intervention, Jiangsu Provincial Taihu Sanatorium, Wuxi, Jiangsu 214086, P.R. China

Copyright: © Shen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
Article Number: 370
|
Published online on: February 19, 2021

https://doi.org/10.3892/etm.2021.9801
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Abstract

The present study aimed to evaluate the use of ¹⁸F‑fluorodeoxyglucose (¹⁸F‑FDG) positron emission tomography (PET) for detection of high‑fat and high‑salt diet‑induced inflammatory lesions of the arterial vessel walls in Wistar rats. A total of 20 healthy, 8‑week‑old, male Wistar rats were randomly assigned to the high‑fat diet group and the normal diet group. After 16 and 24 weeks of feeding, Wistar rats in the normal diet group and the high‑fat diet group (five rats in each group) were injected with ¹⁸F‑FDG through the tail vein at a dose of 1 mCi/kg after fasting for 12 h. After 1 h, the rats were anesthetized with 2% isoflurane, followed by micro‑PET imaging with a 10‑min image capture duration and immunohistochemical staining. The standardized uptake values (SUVs) of ¹⁸F‑FDG were significantly higher in the iliac artery in the high‑fat diet group compared with those in the normal diet group at 16 weeks (1.53±0.08 vs. 1.04±0.03; P<0.05) and at 24 weeks (1.96±0.17 vs. 1.12±0.07; P<0.05). The SUVs of ¹⁸F‑FDG were also significantly greater in the abdominal aorta in the high‑fat diet group compared with those in the normal diet group at 16 weeks (1.35±0.08 vs. 1.02±0.02; P<0.05) and at 24 weeks (1.54±0.09 vs. 1.04±0.02; P<0.05). In addition, the SUVs of 18F‑FDG in the iliac artery and abdominal aorta were significantly higher at 24 weeks compared with those at 16 weeks in the high‑fat diet group (P<0.05). As determined by immunohistochemistry, the percentage of CD68‑positive cells in the total number of cells per unit area in each group was 3.20±1.80% in the 24‑week normal diet group, 4.70±2.02% in the 16‑week high‑fat diet group and 6.94±2.02% in the 24‑week high‑fat diet group; the percentage of CD68‑positive cells in the high‑fat diet group at 24 weeks was significantly higher than that in the high‑fat diet group at 16 weeks and in the normal diet group at 24 weeks (P<0.05). In conclusion, ¹⁸F‑FDG PET is a noninvasive imaging tool that can continuously monitor inflammatory lesions of the arterial vessel walls in Wistar rats. Further improvement of the Wistar rat atherosclerosis model may provide data to support the early assessment of and intervention in atherosclerosis.

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