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Yang J, Wang H, Chen H, Hou H, Hu Q. The association of genetic polymorphisms within the dopaminergic system with nicotine dependence: A narrative review. Heliyon 2024; 10:e33158. [PMID: 39021905 PMCID: PMC11253068 DOI: 10.1016/j.heliyon.2024.e33158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 06/08/2024] [Accepted: 06/14/2024] [Indexed: 07/20/2024] Open
Abstract
Nicotine, the main compound in cigarettes, leads to smoking addiction. Nicotine acts on the limbic dopamine reward loop in the midbrain by binding to nicotinic acetylcholine receptors, promoting the release of dopamine, and resulting in a rewarding effect or satisfaction. This satisfaction is essential for continued and compulsive tobacco use, and therefore dopamine plays a crucial role in nicotine dependence. Numerous studies have identified genetic polymorphisms of dopaminergic pathways which may influence susceptibility to nicotine addiction. Dopamine levels are greatly influenced by synthesis, storage, release, degradation, and reuptake-related genes, including genes encoding tyrosine hydroxylase, dopamine decarboxylase, dopamine transporter, dopamine receptor, dopamine 3-hydroxylase, catechol-O-methyltransferase, and monoamine oxidase. In this paper, we review research progress on the effects of polymorphisms in the above genes on downstream smoking behavior and nicotine dependence, to offer a theoretical basis for the elucidation of the genetic mechanism underlying nicotine dependence and future personalized treatment for smoking cessation.
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Affiliation(s)
- Jingjing Yang
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou, 450001, China
- Beijing Life Science Academy, Beijing, 102209, China
- Key Laboratory of Tobacco Biological Effects and Biosynthesis, Beijing, 102209, China
| | - Hongjuan Wang
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou, 450001, China
- Beijing Life Science Academy, Beijing, 102209, China
- Key Laboratory of Tobacco Biological Effects and Biosynthesis, Beijing, 102209, China
| | - Huan Chen
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou, 450001, China
- Beijing Life Science Academy, Beijing, 102209, China
- Key Laboratory of Tobacco Biological Effects and Biosynthesis, Beijing, 102209, China
| | - Hongwei Hou
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou, 450001, China
- Beijing Life Science Academy, Beijing, 102209, China
- Key Laboratory of Tobacco Biological Effects and Biosynthesis, Beijing, 102209, China
| | - Qingyuan Hu
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou, 450001, China
- Beijing Life Science Academy, Beijing, 102209, China
- Key Laboratory of Tobacco Biological Effects and Biosynthesis, Beijing, 102209, China
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Cannella N, Tambalo S, Lunerti V, Scuppa G, de Vivo L, Abdulmalek S, Kinen A, Mackle J, Kuhn B, Solberg Woods LC, Chung D, Kalivas P, Soverchia L, Ubaldi M, Hardiman G, Bifone A, Ciccocioppo R. Long-access heroin self-administration induces region specific reduction of grey matter volume and microglia reactivity in the rat. Brain Behav Immun 2024; 118:210-220. [PMID: 38452987 DOI: 10.1016/j.bbi.2024.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 02/08/2024] [Accepted: 03/02/2024] [Indexed: 03/09/2024] Open
Abstract
In opioid use disorder (OUD) patients, a decrease in brain grey matter volume (GMV) has been reported. It is unclear whether this is the consequence of prolonged exposure to opioids or is a predisposing causal factor in OUD development. To investigate this, we conducted a structural MRI longitudinal study in NIH Heterogeneous Stock rats exposed to heroin self-administration and age-matched naïve controls housed in the same controlled environment. Structural MRI scans were acquired before (MRI1) and after (MRI2) a prolonged period of long access heroin self-administration resulting in escalation of drug intake. Heroin intake resulted in reduced GMV in various cortical and sub-cortical brain regions. In drug-naïve controls no difference was found between MRI1 and MRI2. Notably, the degree of GMV reduction in the medial prefrontal cortex (mPFC) and the insula positively correlated with the amount of heroin consumed and the escalation of heroin use. In a preliminary gene expression analysis, we identified a number of transcripts linked to immune response and neuroinflammation. This prompted us to hypothesize a link between changes in microglia homeostasis and loss of GMV. For this reason, we analyzed the number and morphology of microglial cells in the mPFC and insula. The number of neurons and their morphology was also evaluated. The primary motor cortex, where no GMV change was observed, was used as negative control. We found no differences in the number of neurons and microglia cells following heroin. However, in the same regions where reduced GMV was detected, we observed a shift towards a rounder shape and size reduction in microglia, suggestive of their homeostatic change towards a reactive state. Altogether these findings suggest that escalation of heroin intake correlates with loss of GMV in specific brain regions and that this phenomenon is linked to changes in microglial morphology.
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Affiliation(s)
- Nazzareno Cannella
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy.
| | - Stefano Tambalo
- CIMeC, Center for Mind/Brain Science, University of Trento, Trento, Italy
| | - Veronica Lunerti
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy
| | - Giulia Scuppa
- Center for Neuroscience and Cognitive Systems @UniTn, Istituto Italiano di Tecnologia, Rovereto, Italy
| | - Luisa de Vivo
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy
| | | | - Analia Kinen
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy; Faculty of Medicine, Queen's University Belfast, UK
| | - James Mackle
- Faculty of Medicine, Queen's University Belfast, UK
| | - Brittany Kuhn
- Department of Neuroscience, Medical University of South Carolina (MUSC), Charleston (SC), USA
| | | | - Dongjun Chung
- Department of Biomedical Informatics, The Ohio State University, Columbus (OH), USA
| | - Peter Kalivas
- Department of Neuroscience, Medical University of South Carolina (MUSC), Charleston (SC), USA
| | - Laura Soverchia
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy
| | - Massimo Ubaldi
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy
| | | | - Angelo Bifone
- Center for Neuroscience and Cognitive Systems @UniTn, Istituto Italiano di Tecnologia, Rovereto, Italy; Department of Molecular Biotechnology and Health Sciences, University of Torino, Italy
| | - Roberto Ciccocioppo
- School of Pharmacy, Pharmacology Unit, Center for Neuroscience, University of Camerino, Camerino, Italy
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Kaya-Akyüzlü D, Özkan-Kotiloğlu S, Yıldırım SA, Danışman M, Yıldırım MA, Özgür-İlhan İ. Effect of MAOA rs1465108 polymorphism on susceptibility to substance/alcohol use disorder: a novel PCR-RFLP assay for the detection of MAOA rs1465108. Mol Biol Rep 2024; 51:400. [PMID: 38457024 DOI: 10.1007/s11033-024-09366-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/19/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND The health and social consequences of substance/alcohol use disorders are harmful. Most of the individuals cannot stop using them due to more likely their genetic background. The current study aimed both to develop a novel PCR-RFLP method for genotyping of MAOA rs1465108 and to analyze the effect of MAOA rs1465108 on the risk of alcohol (AUD), opioid (OUD) or methamphetamine (MUD) use disorders and on the depressive and anxiety symptoms in a Turkish population. METHODS AND RESULTS A total of 353 individual with AUD (n = 154), OUD (n = 160) or MUD (n = 39) and 109 healthy subjects were included. The intensity of anxiety and depressive symptoms and craving and opioid withdrawal were measured by appropriate scales. Logistic regression analysis revealed no association between MAOA rs1465108 polymorphism and substance/alcohol use disorder (p > 0.05). Healthy subjects (3.0) had significantly lower levels of depressive symptoms than individuals with OUD (27.0), AUD (21.0) and MUD (25.5) groups. The severity of depressive symptoms was significantly higher in OUD as compared to AUD. There was a statistically significant difference between individuals with AUD, OUD and MUD in view of the average ages of first use (17, 19 and 20 years, respectively) (p < 0.05). CONCLUSIONS The results presented here do not support the hypothesis that MAOA rs1465108 is associated with substance/alcohol use disorders. The intensity of depressive symptoms could be changed according to the abused substance type. A novel PCR-RFLP was developed for genotyping of MAOA rs1465108 polymorphism, which could be a better option for laboratories without high technology equipment.
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Affiliation(s)
- Dilek Kaya-Akyüzlü
- Institute of Forensic Sciences, Ankara University, Dikimevi, 06590, Ankara, Turkey.
| | - Selin Özkan-Kotiloğlu
- Department of Molecular Biology and Genetics, Faculty of Science and Art, Kırşehir Ahi Evran University, Merkez/Kırşehir, Turkey
- Graduate School of Health Sciences, Ankara University, Ankara, Turkey
| | - Sariye Aybüke Yıldırım
- Institute of Forensic Sciences, Ankara University, Dikimevi, 06590, Ankara, Turkey
- Graduate School of Health Sciences, Ankara University, Ankara, Turkey
| | - Mustafa Danışman
- Ankara Training and Research Hospital AMATEM Clinic, Ankara, Turkey
| | - Mukaddes Asena Yıldırım
- Institute of Forensic Sciences, Ankara University, Dikimevi, 06590, Ankara, Turkey
- Graduate School of Health Sciences, Ankara University, Ankara, Turkey
| | - İnci Özgür-İlhan
- Department of Mental Health and Diseases, Faculty of Medicine, Ankara University, Ankara, Turkey
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Cannella N, Tambalo S, Lunerti V, Scuppa G, de Vivo L, Abdulmalek S, Kinen A, Mackle J, Kuhn B, Solberg Woods LC, Chung D, Kalivas P, Soverchia L, Ubaldi M, Hardiman G, Bifone A, Ciccocioppo R. Long-access heroin self-administration induces region specific reduction of grey matter volume and microglia reactivity in the rat. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.26.582024. [PMID: 38463974 PMCID: PMC10925188 DOI: 10.1101/2024.02.26.582024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
In opioid use disorder (OUD) patients, a decrease in brain grey matter volume (GMV) has been reported. It is unclear whether this is the consequence of prolonged exposure to opioids or is a predisposing causal factor in OUD development. To investigate this, we conducted a structural MRI longitudinal study in NIH Heterogeneous Stock rats exposed to heroin self-administration and age-matched naïve controls housed in the same controlled environment. Structural MRI scans were acquired before (MRI 1 ) and after (MRI 2 ) a prolonged period of long access heroin self-administration resulting in escalation of drug intake. Heroin intake resulted in reduced GMV in various cortical and sub-cortical brain regions. In drug-naïve controls no difference was found between MRI 1 and MRI 2 . Notably, the degree of GMV reduction in the medial prefrontal cortex (mPFC) and the insula positively correlated with the amount of heroin consumed and the escalation of heroin use. In a preliminary gene expression analysis, we identified a number of transcripts linked to immune response and neuroinflammation. This prompted us to hypothesize a link between changes in microglia homeostasis and loss of GMV. For this reason, we analyzed the number and morphology of microglial cells in the mPFC and insula. The number of neurons and their morphology was also evaluated. The primary motor cortex, where no GMV change was observed, was used as negative control. We found no differences in the number of neurons and microglia cells following heroin. However, in the same regions where reduced GMV was detected, we observed a shift towards a rounder shape and size reduction in microglia, suggestive of their homeostatic change towards a reactive state. Altogether these findings suggest that escalation of heroin intake correlates with loss of GMV in specific brain regions and that this phenomenon is linked to changes in microglial morphology.
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Krueger K, Lamenza F, Gu H, El-Hodiri H, Wester J, Oberdick J, Fischer AJ, Oghumu S. Sex differences in susceptibility to substance use disorder: Role for X chromosome inactivation and escape? Mol Cell Neurosci 2023; 125:103859. [PMID: 37207894 PMCID: PMC10286730 DOI: 10.1016/j.mcn.2023.103859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 05/01/2023] [Accepted: 05/08/2023] [Indexed: 05/21/2023] Open
Abstract
There is a sex-based disparity associated with substance use disorders (SUDs) as demonstrated by clinical and preclinical studies. Females are known to escalate from initial drug use to compulsive drug-taking behavior (telescoping) more rapidly, and experience greater negative withdrawal effects than males. Although these biological differences have largely been attributed to sex hormones, there is evidence for non-hormonal factors, such as the influence of the sex chromosome, which underlie sex disparities in addiction behavior. However, genetic and epigenetic mechanisms underlying sex chromosome influences on substance abuse behavior are not completely understood. In this review, we discuss the role that escape from X-chromosome inactivation (XCI) in females plays in sex-associated differences in addiction behavior. Females have two X chromosomes (XX), and during XCI, one X chromosome is randomly chosen to be transcriptionally silenced. However, some X-linked genes escape XCI and display biallelic gene expression. We generated a mouse model using an X-linked gene specific bicistronic dual reporter mouse as a tool to visualize allelic usage and measure XCI escape in a cell specific manner. Our results revealed a previously undiscovered X-linked gene XCI escaper (CXCR3), which is variable and cell type dependent. This illustrates the highly complex and context dependent nature of XCI escape which is largely understudied in the context of SUD. Novel approaches such as single cell RNA sequencing will provide a global molecular landscape and impact of XCI escape in addiction and facilitate our understanding of the contribution of XCI escape to sex disparities in SUD.
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Affiliation(s)
- Kate Krueger
- Department of Pharmacy, The Ohio State University, Columbus, OH, USA
| | - Felipe Lamenza
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Microbiology, The Ohio State University, Columbus, OH, USA
| | - Howard Gu
- Department of Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH, USA
| | - Heithem El-Hodiri
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Jason Wester
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - John Oberdick
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Andy J Fischer
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Steve Oghumu
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
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Brain Magnetic Resonance Imaging Features of Nicotine-Dependent Individuals and Its Correlation with Polymorphisms of Dopamine D Receptor Gene. CONTRAST MEDIA & MOLECULAR IMAGING 2022; 2022:2296776. [PMID: 36082055 PMCID: PMC9433208 DOI: 10.1155/2022/2296776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 07/12/2022] [Accepted: 07/15/2022] [Indexed: 11/17/2022]
Abstract
The aim of this research was developed to provide a scientific basis for individualized prevention, clinical diagnosis, and corrective treatment of nicotine addiction. The objects were 214 cases in the smoke group and 43 cases in the control group. According to the Fagerstrom Nicotine Dependence Test (FTND), the smokers were divided into mild nicotine dependence group (FTND < 6 points, 138 cases) and nicotine severe dependence group (≥6 points, 76 cases). The brain structure in long-term smokers was evaluated by using magnetic resonance imaging (MRI). The nicotine dependence was further analyzed by grouping the included individuals, and some candidate genes related to nicotine addiction were screened by combining with bioinformatics analysis. The family research strategy was adopted to detect nicotine addiction susceptibility genes and their polymorphisms. The MRI imaging results showed that the bilateral thalamus, right parietal, and left lens gram-molecule volume (GMV) were negatively correlated with smoking index and smoking years in the smoking group. The GMV of the posterior cingulate cortex in the severe nicotine dependence group was lower than that of the control group, and the GMVs of bilateral thalamus and bilateral superior limbic gyrus in the mild nicotine dependence group were lower than those of the control group. The gene polymorphism detection showed that rs6275 was highly polymorphic in the target population and the frequency of rs6275-C allele was 53.26%. Therefore, the MRI imaging characteristics suggested that the affected brain regions of smokers and people with varying degrees of nicotine dependence were mainly concentrated in response-related pathways and the limbic system and had cumulative effects on the central nervous system. In addition, the M6275 polymorphism of DRD2 gene was associated with susceptibility to nicotine addiction in Chinese population, and the M6275-C allele had a protective effect on susceptibility to nicotine addiction and smoking initiation.
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Demir B, Ozsoy F, Buyuk A, Altindag A. ECG changes in patients with opioid use disorder; P-QT wave dispersion: a retrospective study. J Addict Dis 2020; 39:234-240. [PMID: 33215556 DOI: 10.1080/10550887.2020.1848257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE We aimed to examine the electrocardiographic arrhythmia risk predictors in patients with opioid use disorder by P wave dispersion, QT dispersion, and by comparing Tp-e/QTc ratio with healthy controls. METHODS One hundred seventeen patients who were diagnosed with opioid use disorder according to DSM-5 criteria and who were hospitalized in 25 Aralık Gaziantep State Hospital AMATEM (Alcohol and substance addiction treatment center) service and a healthy control group consisting of 168 subjects were included in the study. Electrocardiography (ECG) scans of all participants were performed in the supine position and at rest. P wave dispersion, QT dispersion, and Tp-e/QTc ratio were calculated. RESULTS Of all the participants, 12 were women (4.21%), 273 (95.78%) were men. The mean age of all participants was 30.42 ± 9.36 years. No difference was found between the gender, mean age, marital status, educational level, and smoking status of the participants (p > 0.05). The entire patient group was using heroin. Heart rate of the patient group was calculated as 68.14 ± 13.26 beats per minute, being lower than healthy controls (p < 0.05). Although QT dispersion value was lower than healthy controls (p < 0.05); P wave dispersion did not differ between groups (p > 0.05). CONCLUSION It is thought that the patients with opioid use disorder are at risk for cardiac arrhythmia based on our findings. Therefore, physicians should be careful about cardiac rhythm and conduction problems while organizing any treatment of these patients.
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Affiliation(s)
- Bahadir Demir
- Department of Psychiatry, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Filiz Ozsoy
- Clinic of Psychiatry, Tokat State Hospital, Tokat, Turkey
| | - Ahmet Buyuk
- 25 December State Hospital, Clinic of Cardiology, Gaziantep, Turkey
| | - Abdurrahman Altindag
- Department of Psychiatry, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
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Joshi DD, Puaud M, Fouyssac M, Belin‐Rauscent A, Everitt B, Belin D. The anterior insular cortex in the rat exerts an inhibitory influence over the loss of control of heroin intake and subsequent propensity to relapse. Eur J Neurosci 2020; 52:4115-4126. [DOI: 10.1111/ejn.14889] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Dhaval D. Joshi
- Department of Psychology University of Cambridge Cambridge UK
| | - Mickaël Puaud
- Department of Psychology University of Cambridge Cambridge UK
| | - Maxime Fouyssac
- Department of Psychology University of Cambridge Cambridge UK
| | | | - Barry Everitt
- Department of Psychology University of Cambridge Cambridge UK
| | - David Belin
- Department of Psychology University of Cambridge Cambridge UK
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Shen Z, Huang P, Wang C, Qian W, Luo X, Gu Q, Chen H, Wang H, Yang Y, Zhang M. Interactions between monoamine oxidase A rs1137070 and smoking on brain structure and function in male smokers. Eur J Neurosci 2018; 50:2201-2210. [PMID: 30456877 DOI: 10.1111/ejn.14282] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 10/29/2018] [Accepted: 11/01/2018] [Indexed: 11/28/2022]
Abstract
The monoamine oxidase A (MAOA) enzyme metabolizes monoamine neurotransmitters such as dopamine, serotonin and norepinephrine, and its genetic polymorphism (rs1137070) influences its activity level and is associated with smoking behaviors. However, the underlying neural mechanisms of the gene × environment interactions remain largely unknown. In this study, we aimed to explore the interactive effects of the rs1137070 and cigarette smoking on gray matter volume (GMV) and functional connectivity strength (FCS). A total of 81 smokers and 42 nonsmokers were enrolled in the present study. Voxel-based morphometry analysis showed a significant rs1137070 genotype × smoking effect on the GMV of the left orbitofrontal cortex (OFC), such that individuals with risk allele had greater GMV among nonsmokers but not smokers. Meanwhile, rs1137070 variant and nicotine dependence interactively altered the FCS of the right hippocampus, the left inferior parietal lobule (IPL), the left dorsolateral prefrontal cortex and bilateral OFC. In addition, the FCS in the left IPL was correlated with smoking initiation and smoking years in smokers with the risk allele. These findings suggest that MAOA rs1137070 contributes to the susceptibility to nicotine dependence through its influence on brain circuits involved in reward and attention, and interacts with smoking in the progression.
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Affiliation(s)
- Zhujing Shen
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Peiyu Huang
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Chao Wang
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Wei Qian
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Xiao Luo
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Quanquan Gu
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
| | - Huan Chen
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, China
| | - Hongjuan Wang
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, China
| | - Yihong Yang
- Neuroimaging Research Branch, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - Minming Zhang
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
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