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Liu C.,Beijing Key Laboratory of Neurostimulation | Wang H.-M.,Beijing Key Laboratory of Neurostimulation | Zhang J.-G.,Beijing Key Laboratory of Neurostimulation | Zhang C.,Beijing Key Laboratory of Neurostimulation | And 5 more authors.
Chinese Journal of Contemporary Neurology and Neurosurgery | Year: 2015

Background: Deep brain stimulation (DBS) offers a very promising therapy for medically intractable dystonia. Among different dystonia subtypes, the surgical outcome of primary dystonia is most convincing, while that of post-traumatic dystonia is uncertain. This paper aims to evaluate the effect of DBS on post-traumatic dystonia. Methods: Four patients of post-traumatic dystonia treated with DBS on globus pallidus internus (GPi) or subthalamic nucleus (STN) were reviewed and their surgical effect was evaluated. Outcome assessments were based on Burke- Fahn-Marsden Dystonia Rating Scale (BFMDRS) movement and disability scores preoperatively and one month, 6 months, one year and 2 years after surgery. Improvement rate was counted to evaluate the curative effect. Results: BFMDRS movement scores were improved by 38.35%, 47.28%, 62.74% and 68.69% respectively, and disability scores were improved by 35.36%, 46.83%, 59.60% and 67.01% respectively. Imaging features of these patients were reviewed. Although the location and size of encephalomalacia differed among these patients, the anatomical features of basal ganglia remained intact. Conclusions: With strict selection, DBS may be a promising treatment to ameliorate the symptoms of post-traumatic dystonia. The surgical effect may be sustainable in long term. Anatomical integrity of basal ganglia may be an important factor to predict good outcome. Copyright © 2015 by the Editorial Board of Chinese Journal of Contemporary Neurology and Neurosurgery.

Yang A.-C.,Capital Medical University | Shi L.,Capital Medical University | Li L.-M.,Tsinghua University | Li L.-M.,Beijing Key Laboratory of Neurostimulation | And 8 more authors.
Brain Stimulation | Year: 2015

Background Stimulation of the anterior nucleus of the thalamus (ANT) is effective in seizure reduction, but the mechanisms underlying the beneficial effects of ANT stimulation are unclear. Objective To assess the beneficial effects of ANT stimulation on hippocampal neurons of epileptic monkeys. Methods Chronic ANT stimulation was applied to kainic acid-induced epileptic monkeys. Behavioral seizures were continuously monitored. Immunohistochemical staining and western blot assays were performed to assess the hippocampal injury and the effects of ANT stimulation. Results The frequency of seizures was 42.8% lower in the stimulation group compared with the sham-stimulation group. Immunohistochemical staining and western blot analyses indicated that neuronal loss and apoptosis were less severe and that neurofilament synthesis was enhanced in the stimulation monkeys compared with the sham-stimulation group. These data showed that the hippocampal injury was less severe in monkeys in the stimulation group than in those in the sham-stimulation group. Conclusions Our data suggest that chronic ANT stimulation may exert protective effects on hippocampal neurons and boost the regeneration of neuronal fibers. These effects may be closely related to the mechanisms of ANT stimulation in epilepsy treatment. © 2015 Elsevier Inc.

Wang X.,Capital Medical University | Wang X.,Beijing Key Laboratory of Neurostimulation | Wang Y.,Beijing Jingmei Group General Hospital | Zhang C.,Capital Medical University | And 12 more authors.
Brain Research | Year: 2016

Both endocannabinoids and dynorphin are feedback messengers in nervous system that act at the presynaptic nerve terminal to inhibit transmitter release. Many studies showed the cannabinoid-opioid cross-modulation in antinociception, hypothermia, sedation and reward. The aim of this study was to assess the influence of early application of cannabinoid type 1 (CB1) receptor antagonism SR141716A after brain injury on dynorphin-κ opioid receptor (KOR) system and the expression of metabotropic glutamate receptors (mGluRs) in a rat model of fluid percussion injury (FPI). Firstly, seizure latency induced by pentylenetetrazole was significantly prolonged 6 weeks after brain injury in group of SR141716A treatment. Then, PCR and western blot showed that SR141716A inhibited the long-term up-regulation of CB1 receptors in hippocampus. However, SR141716A resulted in long-term potentiation of dynorphin release and did not influence the up-regulation of KOR in hippocampus after brain injury. Furthermore, SR141716A reverse the overexpression of mGluR5 in the late stage of brain injury. We propose that during the induction of epileptogenesis after brain injury, early application of CB1 receptor antagonism could prevent long-term hyperexcitability by up-regulation of dynorphin-KOR system and prevention of mGluR5 induced epileptogenesis in hippocampus. © 2016 Elsevier B.V. All rights reserved.

Zhang C.,Capital Medical University | Zhang C.,Beijing Key Laboratory of Neurostimulation | Wang Y.,Beijing Jingmei Group General Hospital | Wang X.,Capital Medical University | And 7 more authors.
Acta Neurochirurgica | Year: 2015

Background: Meningioangiomatosis (MA) is a rare cerebral lesion. Sporadic MA occasionally combines with meningioma (MA-M). The aim of the present study was to clarify whether MA-M and pure MA have clinical differences and to determine risk factors for unsatisfactory seizure outcomes in sporadic MA. Methods: We reported 14 sporadic MA cases in our center and conducted a literature review. We compared the demographic, clinical, imaging, electrophysiological and pathological features and surgical outcomes. Logistic regression analysis was performed to evaluate the risk factors for poor seizure outcomes. Results: MA-M cases showed a more prominent male predilection (4.2 times vs. 1.6 times, p = 0.04), a shorter duration of symptoms (2.8 ± 0.8 years vs. 5.2 ± 0.6 years, p = 0.02), and a lower seizure incidence (53.6 % vs. 89.3 %, p < 0.001) as compared to pure MA. A gyriform alteration on imaging was exclusively associated with pure MA. The Ki-67 was higher in the meningioma component than in the MA component in MA-M (1.2 ± 0.3 % vs. 6.1 ± 1.1 %, p < 0.001). Lesions located in the temporal lobe predicted poor seizure outcomes (p = 0.02, OR = 4.4, 95 % confidence interval, 1.24–15.89). Conclusion: Clinical differences may be caused by the different biological natures. MA-M seems to be a neoplastic lesion, while pure MA seems to be a non-neoplastic lesion. Long-term follow-up is required for MA-M. Because the coexistence of hippocampal sclerosis may explain the poor seizure outcomes of MA located in the temporal lobe, it is important to identify underlying hippocampal sclerosis and to perform complete resection. © 2015, Springer-Verlag Wien.

Zhang C.,Capital Medical University | Zhang C.,Beijing Key Laboratory of Neurostimulation | Wei N.-L.,Lanzhou University | Wang Y.,Capital Medical University | And 5 more authors.
Neuroscience Letters | Year: 2015

The aim of this study was to assess the anti-obesity effects of nucleus accumbens shell (NAc-sh) deep brain stimulation (DBS) in diet-induced obese (DIO) and chow-fed (chow) rats. The influence of DBS on dopamine (DA) signaling in the NAc-sh was also evaluated. DIO and chow rats were subjected to DBS for 14 consecutive days. Food intake and weight gain were measured daily. The gene expression of the dopamine D1 and D2 receptors was evaluated by qPCR. In addition, the extracellular levels of DA and its metabolite, dihydroxyphenylacetic acid (DOPAC), were determined by microdialysis. We observed that chronic DBS induced significant reductions in total energy intake (596.0 ± 65.0. kcal vs. 1161.6 ± 22.2. kcal, p<. 0.001) and weight gain (1.45 ± 0.57% vs. 9.64 ± 0.38%, p<. 0.001) in DIO rats compared to sham-DIO rats. Up-regulated D2 receptor gene expression (2.43 ± 0.12 vs. 0.64 ± 0.04, p<. 0.001) and increased DA levels (2.73 ± 0.15. pmol/mL vs. 0.62 ± 0.05. pmol/mL, p<. 0.001) were observed in DIO rats compared to sham-DIO rats. DBS had no influence on food intake, weight gain, or DA neurotransmission in chow rats. Our results support an association of the anorexigenic effects of NAc-sh DBS with mesolimbic DA signaling and indicate that the positive alteration of DA function in DIO rats may be responsible for the different effects of DBS in DIO and chow rats. © 2015 Elsevier Ireland Ltd.

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