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- W4294992983 abstract "<h2>Abstract</h2><h3>Introduction</h3> Idiopathic rapid eye movement sleep behavior disorder (iRBD) is one of the most specific prodromal symptoms of synucleinopathies, including Parkinson's disease (PD) and multiple system atrophy. The Japan Parkinson's Progression Markers Initiative (J-PPMI) was a prospective cohort study conducted in Japanese patients with iRBD to investigate biomarkers for prodromal synucleinopathies. We carried out an initial assessment of the J-PPMI study to reveal the factors correlated with dopamine transporter single-photon emission computed tomography (DaT) and <sup>123</sup>I-<i>meta</i>-iodobenzylguanidine (MIBG) myocardial scintigraphy. <h3>Methods</h3> This cross-sectional study was conducted in 108 patients with iRBD, selected from the J-PPMI study. We divided the patients into four groups based on the MIBG and DaT results. We also recorded the patients' demographics and clinical data. Following PD probability calculation, we examined the biomarkers associated with DaT and MIBG. <h3>Results</h3> Ninety-five of the enrolled patients (88%) met the diagnostic criteria for prodromal PD based on the probability score. Only five patients had normal MIBG and DaT. We identified 29 cases with decreased DaT and MIBG, all of whom met the above diagnostic criteria. Both DaT and MIBG were significantly correlated with the Japanese version of the Montreal Cognitive Assessment (MoCA-J) score. <h3>Conclusion</h3> Both DaT and MIBG are important biomarkers for confirming synucleinopathies and/or staging disease progression. Although 95% of iRBD patients were consistent with the body-first subtype concept, alpha-synuclein pathologies of iRBD might have widespread systemic involvement rather than being confined to the lower brainstem, particularly in patients with reduced MoCA-J scores." @default.
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- W4294992983 date "2022-10-01" @default.
- W4294992983 modified "2023-10-17" @default.
- W4294992983 title "Idiopathic rapid eye movement sleep behavior disorder in Japan: An observational study" @default.
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- W4294992983 doi "https://doi.org/10.1016/j.parkreldis.2022.08.011" @default.
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