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OBJECTIVE@#To observe the effect of electroacupuncture (EA) preconditioning at heart meridian acupoints on the contents of dopamine (DA) and 5-hydroxytryptamine (5-HT) in lateral hypothalamus area (LHA) and cerebellar fastigial nucleus (FN) in the rats with acute myocardial ischemia-reperfusion injury (MIRI), and explore the role and mechanism of LHA and FN in the effect of EA at heart meridian acupoints against acute MIRI.@*METHODS@#Sixty SD rats were randomly divided into a sham-operation group, a model group, an EA heart meridian group and an EA lung meridian group, 12 rats in each group, as well as an LHA plus heart meridian group (damage of bilateral LHA) and an FN plus heart meridian group (damage of bilateral FN), 6 rats in each one. Three days after nucleus destruction, EA was applied to "Shenmen" (HT 7) and "Tongli" (HT 5) in the EA heart meridian group, the LHA plus heart meridian group and the FN plus heart meridian group and EA was applied to "Taiyuan" (LU 9) and "Lieque" (LU 7) in the EA lung meridian group, with 1 V in stimulating voltage and 2 Hz in frequency, lasting 20 minutes each time, once a day, for consecutively 7 days before model replication. Except in the sham-operation group, MIRI rat models were duplicated by ligation of the left anterior descending branch of the coronary artery in the rest groups. Using Power lab physiological recorder, ST segment displacement value was recorded before modeling, 30 min after ligation and 120 min after reperfusion separately. The high performance liquid chromatography-electrochemical detection and analysis system was adopted to determine the contents of DA and 5-HT in LHA and FN dialysate after rat modeling in each group.@*RESULTS@#In comparison of ST segment displacement value 30 min after ligation and 120 min after reperfusion among groups, the value in the model group was higher than that in the sham-operation group (@*CONCLUSION@#EA preconditioning at heart meridian acupoints can effectively alleviate myocardial injury in acute MIRI rats, during which, DA and 5-HT in LHA and FN may be the important material basis.
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Animais , Ratos , Pontos de Acupuntura , Núcleos Cerebelares , Dopamina , Eletroacupuntura , Região Hipotalâmica Lateral , Isquemia Miocárdica , Traumatismo por Reperfusão Miocárdica/terapia , Ratos Sprague-Dawley , SerotoninaRESUMO
Background:Cerebellar fastigial nucleus (FN)is involved in regulation of visceral activities such as cardiovascular, ingestion,respiratory,and acute gastric mucosal injury,yet it is unclear whether it participates in the regulation of visceral hypersensitivity and what is the possible mechanism. Aims:To investigate the effect and possible mechanism of glutamic acid (Glu ) injection into cerebellar FN on chronic visceral hypersensitivity in rats. Methods: Chronic visceral hypersensitivity rat model was established by neonatal colorectal distension (CRD). After 8 weeks,the rats were divided into CRD group,solvent group (0. 2 μL 0. 9% NaCl solution injection into cerebellar FN),high-,medium-,low-dose Glu groups (12,6,3 μg Glu injection into cerebellar FN,respectively),3-MPA +Glu group (12 μg Glu injection after glutamate decarboxylase inhibitor 3-MPA injection into cerebellar FN),Bic + Glu group (12 μg Glu injection into cerebellar FN after GABAAreceptor blocker Bic injection into lateral hypothalamic area). Pain threshold,abdominal withdrawal reflex (AWR)score and abdominal external oblique muscle electromyography (EMG)were used to detect visceral sensitivity,and malondialdehyde (MDA)content and superoxide dismutase (SOD)activity were measured. Results:Chronic visceral hypersensitivity rat model was successfully established. Compared with CRD group,pain threshold was significantly increased (P＜0. 05),AWR score,EMG amplitude,MDA content were significantly decreased (P＜0. 05 ),and SOD activity was significantly increased in a dose-dependent manner in Glu group (P ＜0. 05 ). Compared with 12 μg Glu group,pain threshold was significantly decreased (P＜0. 05),AWR score,EMG amplitude, MDA content were significantly increased (P ＜0. 05),and SOD activity was significantly decreased in 3-MPA +Glu group,Bic+Glu group (P＜0. 05). Conclusions:Glu injection into cerebellar FN can significantly reduce the visceral sensitivity in rats. The mechanism may be that Glu in cerebellar FN produces GABA via glutamate decarboxylase,and then binding GABAAreceptor in lateral hypothalamic area,resulting in increased intestinal mucosal antioxidant capacity, thereby reducing visceral hypersensitivity.
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@#Objective To investigate the effect of electrical stimulation to cerebellar fastigial nucleus on expression of nuclear factor-kappa B (NF-кB) P50, tumor necrosis factor-α (TNF-α) and Bcl-xL mRNA in rats brain after cerebral ischemia-reperfusion. Methods Sprague-Dawley rats were randomly divided into normal control group (NC group), cerebral ischemia-reperfusion group (I/R group), fastigial nucleus stimulation (FNS) group, and fastigial nucleus lesion (FNL) group. A focal cerebral ischemia-reperfusion model was established with middle cerebral artery occlusion (MCAO). 7 and 14 days after operation, the infarct volume was measured, and the protein of NF-кB P50 in rats brain was detected with Western blotting; the expression of TNF-α and Bcl-xL mRNA was detected with RT-PCR. Results Compared with I/R group, the expression of NF-кB P50 protein increased in FNS group (P<0.05), with the decrease of expression of TNF-α mRNA (P<0.01) and increase of Bcl-xL mRNA (P<0.05), while the infarct size decreased (P<0.01). There was no significant difference between FNL group and I/R group for all the measurements (P>0.05). Conclusion FNS could induce the expression of P50 protein and Bcl-xL mRNA, and inhibit the expression of TNF-α mRNA, and reduce infarct size, which may associated with the neuroprotection of central nervous system from injury.
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Objective To study the effect of electrical stimulation of the fastigial nucleus of the cerebellum (FNS) on learning,memory and the expression of growth-association protein-43 (GAP-43) after cerebral ischemia and reperfusion.Methods Sixty healthy,adult,male Sprague-Dawley rats were randomly divided into a normal group,a sham-operation group (sham group),a model group and an FNS group,with 15 rats in each.Left middle cerebral artery occlusion and reperfusion (MCAO/R) was administered to the rats in the FNS and model groups using the thread embolism method.The rats of the FNS group were given FNS treatment using a pair of needle electrodes inserted into the cerebellar fastigial nucleus 3hrs after the MCAO/R.Needle electrodes were similarly inserted in the model group rats,but no electrical stimulus was applied.Then the rats' learning and memory abilities were tested using a Morris water maze on days 1,3 and 7 after the MCAO/R modeling.The expression of GAP-43 mRNA on the side of the cerebral infarction was detected using a quantitative,real-time polymerase chain reaction.Results The average escape]atencies of the rats in the model and FNS groups were significantly longer than those of the normal and sham groups at all time points,but the FNS group rats demonstrated a significantly shorter average escape latency than the rats of the model group at each time point.The normal and sham groups showed a significantly lower expression of GAP-43 mRNA than the model and FNS group rats at all time points.The FNS group rats had a significantly higher level of GAP-43 mRNA than the rats of the model group.Conclusion FNS improved the rats' learning and memory abilities.This might be associated with the up-regulation of GAP-43 mRNA in neurons on the side of the cerebral infarction which could promote the regeneration and repair of peripheral nerve axons in the area of the infarction.
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Objective To investigate the effect of electrical stimulation to cerebellar fastigial nucleus on expression of nuclear fac-tor-kappa B (NF-кB) P50, tumor necrosis factor-α(TNF-α) and Bcl-xL mRNA in rats brain after cerebral ischemia-reperfusion. Methods Sprague-Dawley rats were randomly divided into normal control group (NC group), cerebral ischemia-reperfusion group (I/R group), fasti-gial nucleus stimulation (FNS) group, and fastigial nucleus lesion (FNL) group. A focal cerebral ischemia-reperfusion model was established with middle cerebral artery occlusion (MCAO). 7 and 14 days after operation, the infarct volume was measured, and the protein of NF-кB P50 in rats brain was detected with Western blotting;the expression of TNF-αand Bcl-xL mRNA was detected with RT-PCR. Results Com-pared with I/R group, the expression of NF-кB P50 protein increased in FNS group (P0.05). Conclusion FNS could induce the expression of P50 protein and Bcl-xL mRNA, and inhibit the expression of TNF-αmRNA, and reduce infarct size, which may associated with the neuroprotection of central ner-vous system from injury.
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@#ObjectiveTo study the therapeutic effects of cerebellar fastigial nucleus electrical stimulation (FNS) on motor and depression symptoms and monoamine neurotransmitters in the spinal cord fluid of patients with Parkinson's disease (PD).Methods65 patients with idiopathic Parkinson's disease following depression were divided into stimulation group (FNS+Madopar, n=35) and control group (Madopar, n=30). The stimulation group took Modopar, and treated with FNS, 30 miniutes once a day for 30 days. The control group took Modopar only. Madopar dose has no change during the treatment. The patients were evaluated by Webster Parkinson's Disease Evaluation Form, and Hamilton Depression Scale (HAMD) before and after FNS treatment. The loading of monoamine neurotransmitters was measured by high performance liquid chromatography-electrochemical process.ResultsAfter the treatment, the stimulation group improved in clinical feature and depression, scored significantly lower on Webster and HAMD than the control group(P<0.05); the loading of 5-hydroxytryptamine(5-HT) in spinal cord fluid increased; however noradrenalin and dopamine had no different. But there was no significant change in the symptoms and the loading of monoamine neurotransmitters in the control group.ConclusionFNS is efficient to relieve the motor and depression symptoms of PD, which possible mechamism might be central neuroprotection and the release of 5-HT by FNS induction.
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Objective To investigate the effect of electrical stimulation of cerebellar fastigial nucleus (FN) on the contents of monoaminergie transmitters in frontal lobes of rats with depression, and to explore the pathway and mechanism of electrical stimulation of cerebellum in treating depression. Methods A total of 30 Wistar rats were used tO establish the animal depression model by exposure to chronic stressing circumstances. Electrical stimulation delivered to the left cerebellar FN or left dentate nucleus (DN) for 1 h was used as the intervention. The contents of serotonin (5-HT), noradrenalin (NE) and dopamine (DA) in frontal lobe were determined with fluorospectropho-tometry. Results Compared with normal control group, the contents of 5-HT and NE in bilateral frontal lobes of depression model rats decreased significantly (P < 0. 001). No significant change of all three monoaminergic trans-mitters in normal rats was observed after stimulation of FN or DN (P > 0. 05), but significant increases of 5-HT and NE in right and left frontal lobes were observed in depression model rats after stimulation of FN (P < 0.05, P < 0.001; P <0.05, P <0.01), with the increase in right lobe more significant than in left lobes (P <0.05). In de-pression model rats underwent DN stimulation, significant increase of contents of all three monoaminergic transmitters in frontal lobes was observed. Conclusion ElectrieM stimulation of cerebellar FN can increase the contents of 5-HT and NE in frontal lobes of rats with depression, and this suggest that electrical stimulation might have therapeutic effect to depression.
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@#The transcutaneous electrostimulation on cerebellum fastigial nucleus had been used clinically.This article would review clinical research and the mechanism of it.
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@#Objective To observe the effect of very early intervention with cerebellar fastigial nucleus electrical stimulation and neurodevelopmental treatment on infants of central coordination disturbance(CCD).Methods 86 infants(0～6 months)with central coordination disturbance were divided into intervention group and control group.The intervention group was treated with neurodevelopmental treatment,cerebellar fastigial nucleus(FN)electrical stimulation and family interference.The control group was treated with neurodevelopmental treatment and family interference.The effect of infant was assessment with Gross Motor Function Measure(GMFM)and Gesell Development Test after 3 months treatment.Results The total improved incidence of the intervention group was 95.6%,which was significantly higher than that of the control group(P<0.01).The difference of scores in social,adaptive and motor area improved in the intervention group compared with that of control group(P<0.05).Conclusion Very early intervention with cerebellar fastigial nucleus electrical stimulation can facilitate the development of gross motor,social,adaptive capability of infants with CCD treated with neurodevelopmental therapy.
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@#Objective To explore the effect of cerebellar fastigial nucleus stimulation (FNS) on the expression of Nestin in adult Wistar rat brain after focal cerebral ischemia/reperfusion.MethodsThe animal model of focal cerebral ischemia/reperfusion was made by filament occlusion of the right middle cerebral artery. 180 male Wistar rats were randomly divided into five groups: normal control group (NC group), sham operation control group (SC group), ischemia/reperfusion group (I/R group), ischemia/reperfusion treated with sham FNS group (I/RFs group), and ischemia/reperfusion treated with FNS group (I/RF group), each group contain 1 d, 3 d, 7 d, 14 d, 21 d and 28 d six time points (for each point, n=6). Immunohistochemistry method was used to detect the number of Nestin expression positive cells following various time and interference in lateral cerebral ventriculus and hippocampus in adult Wistar rat brain.ResultsAfter focal cerebral ischemia/reperfusion, the number of Nestin positive cells increased at each time point, reached small peak value in 7th d ( P<0.01). After treated with FNS, the number of Nestin positive cells increased more strikingly at each time point ( P<0.05, P<0.01), reached higher peak value in 7th d ( P<0.01), and maintained at higher level in 14th d. Furthermore, the shape of Nestin positive cells changed significantly.ConclusionFNS can increase the number of Nestin positive cells in some brain regions after focal cerebral ischemia/reperfusion.
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@#ObjectiveTo observe the effect of cerebellar fastigial nucleus treated by electrical stimulation on patients with acute cerebral infarction.Methods140 cerebral infarction patients with hemiplegia were randomly divided into the experimental group and control group with 70 cases in each group.The experimental group was treated with routine drugs and electrical stimulating on cerebellar fastigial nucleus;the control group was only treated with routine drugs.The changes of motor function of limbs and activities of daily living of two groups were evaluated after treatment.ResultsAfter 21 days treatment,the score of Fugl-Meyer assessment of the experimental group was 39.2±(7.7) and that of the control group was 26.3±8.1.There was a significant difference between two groups(t=4.22,P<0.01).The score of Barther index of the experimental group was 43.8±8.4 and that of the control group was 29.7±7.5.There was also a significant difference between two groups(t=4.97,P<0.01).ConclusionThe electrical stimulation on cerebellar fastigial nucleus is a new effective way to treat acute cerebral infarction.
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Objective To observe the effects of electrical stimulation of the cerebellum′s fastigial nucleus on neurogenic autonomic functional disturbances in rats after ischemic stroke. Methods Right middle cerebral artery occlusions (MCAOs) were performed on rats and their heart rate variability (HRV) was analysed. The MCAO rats were randomly divided into a group whose cerebellar fastigial nuclei (FNS) were stimulated and a control group. The power spectrum components and chaos of their heart rate variability were analysed. The MCAOs were performed after two cerebellar fastigial nuclei had been destroyed by pretreatment with ibotenic acid (IBO), to investigate the effect of stimulating the cerebellum′s fastigial nucleus on heart rate variability. Results The power spectral components and chaos in the heart rate variability of the MCAO rats were reduced, and there was a significant difference in the effectiveness rate compared with the sham groups (P
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Objective To design an electrostimulator for cerebellar fastigial nucleus stimulus, which is controlled with singlechip system and using EEG(Electroencephalogram)to modulate amplitude of the carrier wave. Methods The EEG with instrumentation amplifier of high CMRR (Common Mode Rejection Ratio) and some filters are collected. The electric insulation is achieved by using linear optocouplers on the parts of input and output. Results The stimulator can solve the problem of adaptability for wave to simulate the body, and is safe, non -invasive, and of obvious therapy for ischemic cerebrovascular disease. Conclusion The cerebellar fastigial nucleus stimulus can cure ischemic cerebrovascular disease obviously, and the modulation with EEG can solve the problem of adaptability for wave to simulate the body.
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Objective:To investigate the clinical effect of fastigial nucleus electrical stimulation(FNS) treating the disorders of consciousness by brain damage,and explore the possible mechanism.Methods:9 patients with the disorders of consciousness by brain damage of different pathogeneses were studied.They were treated with FNS on the basis of routine medical treatment.And Glasgow Coma Scale (GCS),electroencephalogram(EEG) and the clinical effects were observed.Results:After FNS treatment,the level of conciousness was improved.GCS were increased 5.22?1.44,which showed significant difference compared to that before treatment ( P