Shuilian Chu1, Dan Xiao2, Shuangkun Wang3, Peng Peng3, Teng Xie4, Yong He4, Chen Wang5. 1. Beijing Chao Yang Hospital, Capital Medical University, Beijing 100020, China; World Health Organization Collaborating Centre for Tobacco and Health, Beijing Institute of Respiratory Medicine, Beijing 100020, China; Department of Respiratory Medicine, Capital Medical University, Beijing 100069, China. 2. Beijing Chao Yang Hospital, Capital Medical University, Beijing 100020, China; World Health Organization Collaborating Centre for Tobacco and Health, Beijing Institute of Respiratory Medicine, Beijing 100020, China; Department of Respiratory Medicine, Capital Medical University, Beijing 100069, China. Email: danxiao@263.net. 3. Beijing Chao Yang Hospital, Capital Medical University, Beijing 100020, China. 4. State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China. 5. World Health Organization Collaborating Centre for Tobacco and Health, Beijing Institute of Respiratory Medicine, Beijing 100020, China; Department of Respiratory Medicine, Capital Medical University, Beijing 100069, China; Research Centre of Respiratory Medicine, Beijing Hospital, Beijing 100730, China; National Health and Family Planning Commission of the People's Republic of China, Beijing 100044, China. Email: cyh-birm@263.net.
Abstract
BACKGROUND: Nicotine is primarily rsponsible for the highly addictive properties of cigarettes. Similar to other substances, nicotine dependence is related to many important brain regions, particular in mesolimbic reward circuit. This study was to further reveal the alteration of brain function activity during resting state in chronic smokers by fractional amplitude of low frequency fluctuation (fALFF) based on functional magnetic resonance imaging (fMRI), in order to provide the evidence of neurobiological mechanism of smoking. METHODS: This case control study involved twenty healthy smokers and nineteen healthy nonsmokers recruited by advertisement. Sociodemographic, smoking related characteristics and fMRI images were collected and the data analyzed. RESULTS: Compared with nonsmokers, smokers showed fALFF increased significantly in the left middle occipital gyrus, left limbic lobe and left cerebellum posterior lobe but decreases in the right middle frontal gyrus, right superior temporal gyrus, right extra nuclear, left postcentral gyrus and left cerebellum anterior lobe (cluster size >100 voxels). Compared with light smokers (pack years ≤ 20), heavy smokers (pack years >20) showed fALFF increased significantly in the right superior temporal gyrus, right precentral gyrus, and right occipital lobe/cuneus but decreased in the right/left limbic lobe/cingulate gyrus, right/left frontal lobe/sub gyral, right/left cerebellum posterior lobe (cluster size >50 voxels). Compared with nonsevere nicotine dependent smokers (Fagerstrőm test for nicotine dependence, score ≤ 6), severe nicotine dependent smokers (score >6) showed fALFF increased significantly in the right/left middle frontal gyrus, right superior frontal gyrus and left inferior parietal lobule but decreased in the left limbic lobe/cingulate gyrus (cluster size >25 voxels). CONCLUSIONS: In smokers during rest, the activity of addiction related regions were increased and the activity of smoking feeling, memory, related regions were also changed. The resting state activity changes in many regions were associated with the cumulative amount of nicotine intake and the severity of nicotine dependence.
BACKGROUND:Nicotine is primarily rsponsible for the highly addictive properties of cigarettes. Similar to other substances, nicotine dependence is related to many important brain regions, particular in mesolimbic reward circuit. This study was to further reveal the alteration of brain function activity during resting state in chronic smokers by fractional amplitude of low frequency fluctuation (fALFF) based on functional magnetic resonance imaging (fMRI), in order to provide the evidence of neurobiological mechanism of smoking. METHODS: This case control study involved twenty healthy smokers and nineteen healthy nonsmokers recruited by advertisement. Sociodemographic, smoking related characteristics and fMRI images were collected and the data analyzed. RESULTS: Compared with nonsmokers, smokers showed fALFF increased significantly in the left middle occipital gyrus, left limbic lobe and left cerebellum posterior lobe but decreases in the right middle frontal gyrus, right superior temporal gyrus, right extra nuclear, left postcentral gyrus and left cerebellum anterior lobe (cluster size >100 voxels). Compared with light smokers (pack years ≤ 20), heavy smokers (pack years >20) showed fALFF increased significantly in the right superior temporal gyrus, right precentral gyrus, and right occipital lobe/cuneus but decreased in the right/left limbic lobe/cingulate gyrus, right/left frontal lobe/sub gyral, right/left cerebellum posterior lobe (cluster size >50 voxels). Compared with nonsevere nicotine dependent smokers (Fagerstrőm test for nicotine dependence, score ≤ 6), severe nicotine dependent smokers (score >6) showed fALFF increased significantly in the right/left middle frontal gyrus, right superior frontal gyrus and left inferior parietal lobule but decreased in the left limbic lobe/cingulate gyrus (cluster size >25 voxels). CONCLUSIONS: In smokers during rest, the activity of addiction related regions were increased and the activity of smoking feeling, memory, related regions were also changed. The resting state activity changes in many regions were associated with the cumulative amount of nicotine intake and the severity of nicotine dependence.
Authors: Peng Peng; Min Li; Han Liu; Ya-Ru Tian; Shui-Lian Chu; Nicholas Van Halm-Lutterodt; Bin Jing; Tao Jiang Journal: Front Neuroanat Date: 2018-05-24 Impact factor: 3.856