Comparative efficacy of transcranial magnetic stimulation on different targets in Parkinson’s disease: A Bayesian network meta-analysis

Background Repetitive transcranial magnetic stimulation (rTMS) has been demonstrated to be effective in Parkinson’s disease (PD), but whether rTMS treatment has a relieving effect on neuroinflammation remains to be investigated. In this article, we explored the effects of rTMS on forelimb use asymmetry and neuroinflammation-related mechanisms in a 6-hydroxydopamine (6-OHDA)-induced PD rat model. Methods and results Rats in the 6-OHDA+rTMS group received 10 Hz rTMS daily for 4 weeks. Behavioral tests (the cylinder test) were performed at the 3rd and 7th weeks after the operation. Astrocyte and microglia activation and protein levels of tyrosine hydroxylase(TH), high-mobility group box 1(HMGB1) and toll-like receptors 4(TLR4) were investigated by immunohistochemistry and Western blot analyses, respectively. After 4 weeks of treatment, forelimb use asymmetry was ameliorated in the 6-OHDA+rTMS group. Consistent with the behavioral tests, rTMS increased TH in the substantia nigra (SN) and the striatum of PD rats. High glial activation and HMGB1/TLR4 expression in the SN and the striatum were observed in the 6-OHDA group, while rTMS alleviated these changes. Conclusions This study showed that rTMS might be a promising method for alleviating neuroinflammation in PD rat models, and the effects might be mediated through the downregulation of the HMGB1/TLR4 pathway.

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Effects of a Single Session of Repetitive Transcranial Stimulation in Parkinson Disease

Teresa,

Alfredo,

Maria

et al. 2024

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Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive technique proposed for recovery of gait and balance in patients with Parkinson's disease (PD). Our aim was to evaluate the effects of rTMS in PD patients by clinical evaluation and computerized gait analysis. Ten patients were recruited. Each patient was assessed before and after a single session of rTMS by: Berg Scale, Unified Parkinson Disease Rating Scale (UPDRS), 6 Minute Walking Test (6MWT), 10MWT, Time Up and Go (TUG) and spatial-temporal gait analysis by Pablo Gait Assessment sensor. We availed of STM 9000, stimulating with 2000 pulses of 20 Hz rTMS, delivered in 5-second trains with 25 seconds between trains, on the hand area of the motor cortex at 90% resting motor threshold (RMT) on each hemisphere, with 5 minutes pause between hemispheres. Eighty percent of the patient reported subjective benefits, corroborated by objective examination of the results. A significant improvement on the Berg scale was observed. Moreover, a tendence to a significant decrease of stiffness at the lower limbs was evident at UPDRS. Gait analysis showed not significant improvements of evaluated parameters. Although it is premature to draw conclusions, because of the small number of patients, underwent to a single session of rTMS, we confirm the possible beneficial effects and the safety of rTMS. Further studies are needed to validate our findings by clinical evaluation and gait analysis at short, medium, and long term. These may be different in relation to the age, duration and stage of the disease, prevalence of tremor or akinesia and rigidity.

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Comparative efficacy of transcranial magnetic stimulation on different targets in Parkinson’s disease: A Bayesian network meta-analysis

Cited by 3 publications

References 96 publications

Mechanisms of Action of TMS in the Treatment of Depression

Mechanisms of Action of TMS in the Treatment of Depression

Repetitive transcranial magnetic stimulation alleviates glial activation through suppressing HMGB1/TLR4 pathway in a rat model of Parkinson’s disease

Effects of a Single Session of Repetitive Transcranial Stimulation in Parkinson Disease

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