Journal
FRONTIERS IN PSYCHIATRY
Volume 11, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpsyt.2020.00492
Keywords
resting state fMRI; amplitude of low-frequency fluctuation (ALFF); heroin addicts; addiction; heroin use
Categories
Funding
- National Natural Science Foundation of China [61971451, U1502225]
- Natural Science Foundation of Hunan Province, China [2015JJ4081]
- National Key Research and Development Program of China [2016YFC0800908]
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Abnormal amplitude of low-frequency fluctuation has been implicated in heroin addiction. However, previous studies lacked consistency and didn't consider the impact of confounding factors such as methadone and alcohol. Fifty-one heroin-dependent (HD) individuals and 40 healthy controls underwent resting-state functional magnetic resonance imaging. The 'amplitude of low-frequency fluctuation' (ALFF) value was calculated and support vector machine (SVM) classification analysis was applied to analyze the data. Compared with healthy controls, heroin addicts exhibited increased ALFF in the right angular gyrus (AG) and left superior occipital gyrus (SOG). A negative correlation was observed between increased ALFF in the right angular gyrus and left superior occipital gyrus and the duration of heroin use (p(1)=0.004,r(1)=-0.426;p(2)=0.009,r(2)=-0.361). Moreover, the ALFF in the right AG and left SOG could discriminate the HD subjects from the controls with acceptable accuracy (Acc(1)=64.85%,p(1)=0.004; Acc(2)=63.80%,p(2)=0.005). HD patients showed abnormal ALFF in the brain areas involved in semantic memory and visual networks. The longer HD individuals abused heroin, the less the ALFF of associated brain regions increased. These observed patterns suggested that the accumulative effect of heroin's neurotoxicity overpowered self-recovery of the brain and may be applied as a potential biomarker to identify HD individuals from the controls.
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