Abstract
Purpose
Recent studies have proposed central serotonergic dysfunction as a major pathophysiology of migraine. We investigated serotonin transporter (SERT) availability in migraineurs using F-18-N-(3-fluoropropyl)-2β-carbomethoxy-3β-(4-iodophenyl) nortropane ([18F]FP-CIT) positron emission tomography (PET).
Methods
Brain [18F]FP-CIT PET images were obtained in eight women with migraine during headache free phase and 12 healthy adult women, 120 min after injection of 185 MBq. Non-displaceable binding potential (BP ND) of [18F]FP-CIT, which is an estimate of SERT availability, was calculated at the brainstem and compared with clinical parameters.
Results
BP ND at the brainstem was significantly higher in adult migraineurs (n = 6, 1.15 ± 0.17) than healthy subjects (0.95 ± 0.14) (p = 0.04). Healthy subjects demonstrated negative correlation between brainstem BP ND and age (r = −0.64, p = 0.02), whereas this age-related decline pattern was not found in the migraineurs. Severity of migraine attack was significantly correlated with brainstem BP ND (r = 0.66, p = 0.02), when age and duration of illness were corrected.
Conclusions
Increased SERT availability in the brainstem of adult migraineurs indicates low serotonin neurotransmission during headache-free phase. Patients who experience more painful headaches have lower serotonin neurotransmission. [18F]FP-CIT PET is a useful in vivo imaging technique for evaluating brainstem SERT availability in migraineurs.
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Acknowledgments
We thank Mi-Sun Ahn and Sun Young Oh for assistance in data acquisition; Jae Sung Lee for providing FMItool; Mi-Ok Kim, Jae-Hoon Baek, Ji-Han Kim and the rest of the staff at the Korea University Anam Hospital PET center for excellent technical assistance. This work was supported by Korea University Grants [K0931131, K0932081].
Conflict of Interest
Eunkyung Park, Yu Mi Hwang, Min Kyung Chu, and Ki-Young Jung declare that they have no conflicts of interest.
Ethical statement
The current study was approved by an institutional review board and has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All subjects in the study gave written informed consent.
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Park, E., Hwang, Y.M., Chu, M.K. et al. Increased Brainstem Serotonergic Transporter Availability in Adult Migraineurs: an [18F]FP-CIT PET Imaging Pilot Study. Nucl Med Mol Imaging 50, 70–75 (2016). https://doi.org/10.1007/s13139-015-0373-x
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DOI: https://doi.org/10.1007/s13139-015-0373-x