Qing Chen1,2,3,4, Haifeng Hou5,6,7,8, Jin Feng1,2,3,4, Xiaohui Zhang1,2,3,4, Yao Chen1,2,3,4, Jing Wang1,2,3,4, Jianfeng Ji1,2,3,4, Xiao He1,2,3,4, Hao Wu1,2,3,4, Hong Zhang9,10,11,12. 1. Department of Nuclear Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, Zhejiang, China. 2. Zhejiang University Medical PET Centre, Zhejiang University, Hangzhou, 310009, China. 3. Institute of Nuclear Medicine and Molecular Imaging, Zhejiang University, Hangzhou, 310009, China. 4. Key Laboratory of Medical Molecular Imaging of Zhejiang Province, Hangzhou, 310009, China. 5. Department of Nuclear Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, Zhejiang, China. hhou@zju.edu.cn. 6. Zhejiang University Medical PET Centre, Zhejiang University, Hangzhou, 310009, China. hhou@zju.edu.cn. 7. Institute of Nuclear Medicine and Molecular Imaging, Zhejiang University, Hangzhou, 310009, China. hhou@zju.edu.cn. 8. Key Laboratory of Medical Molecular Imaging of Zhejiang Province, Hangzhou, 310009, China. hhou@zju.edu.cn. 9. Department of Nuclear Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, Zhejiang, China. hzhang21@zju.edu.cn. 10. Zhejiang University Medical PET Centre, Zhejiang University, Hangzhou, 310009, China. hzhang21@zju.edu.cn. 11. Institute of Nuclear Medicine and Molecular Imaging, Zhejiang University, Hangzhou, 310009, China. hzhang21@zju.edu.cn. 12. Key Laboratory of Medical Molecular Imaging of Zhejiang Province, Hangzhou, 310009, China. hzhang21@zju.edu.cn.
Abstract
PURPOSE: Non-medical use of prescription opioids, especially among adolescents, has been substantially increased in recent years. However, the neuromechanism remains largely unexplored. In the present study, we aimed to investigate the brain metabolic changes in adolescent rats following chronic escalating morphine administration using positron emission tomography (PET). PROCEDURES: 2-Deoxy-2-[18F]Fluoro-D-glucose ([18F]FDG) microPET imaging was performed, and statistical parametric mapping (SPM) was used for image analysis. Glucose transporter 3 (Glut-3), dopamine D2 receptor (D2R), and Mμ-opioid receptor (μ-OR) were used for immunostaining analysis. RESULTS: Cerebral glucose metabolism was increased in the corpus callosum (CC) and right retrosplenial dysgranular cortex (rRSD), while it was decreased in the right ventral pallidum (rVP). The expressions of Glut-3, D2R, and μ-OR were increased in CC and rRSD, while they were decreased in rVP. Furthermore, glucose metabolism and Glut-3 expression were positively correlated with the expressions of D2R or μ-OR in CC, rRSD, and rVP. CONCLUSIONS: [18F]FDG microPET brain imaging study in combination with immunohistological investigation revealed that CC, rRSD, and rVP were specifically involved in opioid dependence in adolescents. Our findings provided valuable insights into the neuromechanism of adolescent addiction of prescription opioids and might have important implications for the development of prevention and intervention approaches.
PURPOSE: Non-medical use of prescription opioids, especially among adolescents, has been substantially increased in recent years. However, the neuromechanism remains largely unexplored. In the present study, we aimed to investigate the brain metabolic changes in adolescent rats following chronic escalating morphine administration using positron emission tomography (PET). PROCEDURES: 2-Deoxy-2-[18F]Fluoro-D-glucose ([18F]FDG) microPET imaging was performed, and statistical parametric mapping (SPM) was used for image analysis. Glucose transporter 3 (Glut-3), dopamine D2 receptor (D2R), and Mμ-opioid receptor (μ-OR) were used for immunostaining analysis. RESULTS:Cerebral glucose metabolism was increased in the corpus callosum (CC) and right retrosplenial dysgranular cortex (rRSD), while it was decreased in the right ventral pallidum (rVP). The expressions of Glut-3, D2R, and μ-OR were increased in CC and rRSD, while they were decreased in rVP. Furthermore, glucose metabolism and Glut-3 expression were positively correlated with the expressions of D2R or μ-OR in CC, rRSD, and rVP. CONCLUSIONS: [18F]FDG microPET brain imaging study in combination with immunohistological investigation revealed that CC, rRSD, and rVP were specifically involved in opioid dependence in adolescents. Our findings provided valuable insights into the neuromechanism of adolescent addiction of prescription opioids and might have important implications for the development of prevention and intervention approaches.
Authors: Yunqi Zhu; Ruili Du; Yuankai Zhu; Yehua Shen; Kai Zhang; Yao Chen; Fahuan Song; Shuang Wu; Hong Zhang; Mei Tian Journal: J Nucl Med Date: 2016-03-16 Impact factor: 10.057