Back to Search Start Over

Role of d-serine in the beneficial effects of repetitive transcranial magnetic stimulation in post-stroke patients.

Authors :
Niimi, Masachika
Fujita, Yuko
Ishima, Tamaki
Hashimoto, Kenji
Sasaki, Nobuyuki
Hara, Takatoshi
Yamada, Naoki
Abo, Masahiro
Source :
Acta Neuropsychiatrica. Jun2020, Vol. 32 Issue 3, p128-134. 7p.
Publication Year :
2020

Abstract

Objective: Abnormalities in neurotransmission via N-methyl-d-aspartic acid receptor (NMDAR) play a role in the pathophysiology of neuropsychiatric disorders. The impact of repetitive transcranial magnetic stimulation (rTMS) on NMDAR-related amino acids remains unknown. We aim to investigate the effects of rTMS on NMDAR-related amino acids in serum of post-stroke patients. Methods: Ninety-five consecutive post-stroke patients with upper limb hemiparesis were recruited. In 27 patients, the Beck Depression Inventory (BDI) score was 10 or higher. Twelve depressed patients underwent rehabilitation in combination with rTMS and 15 non-depressed patients underwent rehabilitation only without rTMS for 14 days. 1 Hz rTMS was applied to the primary motor area in the non-lesional hemisphere. BDI was conducted before and after treatment. Serum glutamine, glutamate, glycine, l-serine, and d-serine levels were measured before and after treatment. Results: There were no differences between depressed patients and non-depressed patients in clinical characteristics, levels of the five amino acids in serum, and the ratio of amino acids. However, in 27 depressed patients, there was a significant correlation between levels of glutamate in serum and BDI (ρ = 0.428, p = 0.026). BDI decreased significantly in depressed patients after treatment with or without rTMS. d-serine decreased in the rehabilitation with rTMS group, but increased in the rehabilitation without rTMS group. l-serine increased in the rehabilitation with rTMS group, but decreased in the rehabilitation without rTMS group. Conclusion: The results suggest that rTMS can modulate NMDAR-related amino acids in blood, producing beneficial effects. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09242708
Volume :
32
Issue :
3
Database :
Academic Search Index
Journal :
Acta Neuropsychiatrica
Publication Type :
Academic Journal
Accession number :
144806211
Full Text :
https://doi.org/10.1017/neu.2020.4