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Objective:To investigate the effects of hippocampal injection of tyrosine kinase receptor binding protein B3(Ephrin-B3) agonist on spontaneous seizures and the expression of hippocampal secretory glycoprotein (Reelin) and phosphorylated adaptor protein (p-Dab1) in epileptic model rats.Methods:Seventy-eight rats were randomly divided into control group and model group according to body mass matching with 39 rats in each group.The rats in control group were fed normaly, and the rats in model group were established epilepsy model by intraperitoneal injection of lithium chloride pilocarpine. The hippocampal tissues were taken in the acute phase (7 days), quiescent phase (14 days) and chronic phase (60 days) after the successful induction of status epilepticus. The levels of Reelin protein and p-Dab1 protein in the hippocampal tissues of epileptic model rats and normal rats were detected by immunohistochemistry and Western blot.And thirteen rats were randomly selected at each time point. Another 48 rats were randomly divided into normal Fc-control group, normal EphB3-Fc group, epilepsy Fc-control group and epilepsy EphB3-Fc group, with 12 rats in each group. Rats in the first two groups were fed normally, and those in the latter two groups were established epileptic model. Seven days after modeling, all rats were injected into bilateral hippocampus with EphB3-Fc (Ephrin-B3 agonist) and FC control (control agent of Ephrin-B3 agonist) according to the grouping, once a day for 7 days. After administration, the changes of behavior and EEG were observed within two weeks. At the same time, the expression of Reelin protein and p-Dab1 protein were detected by immunohistochemistry and Western blot. SPSS 21.0 was used for statistical analysis, One-way ANOVA was used for multi group comparison, and Tukey's test was used for pairwise comparison.Results:The results of immunohistochemistry and Western blot showed that compared with the control group, the levels of Reelin and p-Dab1 protein in hippocampus of model group decreased significantly at 7, 14 and 60 days after epilepsy (all P<0.01). The results of immunohistochemistry showed that compared with epilepsy Fc-control group, the levels of p-Dab1 ((0.41±0.04), (0.58±0.06), P<0.05) in epilepsy EphB3-Fc group increased significantly.Western blot result showed that the level of p-Dab1 in epilepsy EphB3-Fc group increased compared with that of epilepsy Fc-control group (1.34±0.04), (2.26±0.10), P<0.01). Compared with epilepsy Fc-control group, epilepsy EphB3-Fc group showed less average seizure duration ((39.00±1.79)s, (26.50±1.87)s; t=23.21, P<0.01), less frequencies ((2.00±0.89), (0.50±0.55); t=2.32, P<0.01) and less latent period ((6.33±1.37)day, (12.50±1.87)day; t=2.52, P<0.01) in spontaneous recurrent seizures. Compared with epilepsy Fc-control group, epilepsy EphB3-Fc group showed lower average amplitude ((37.30±1.21)μV, (29.00±1.41)μV; t=25.14, P<0.01), less average seizure duration ((5.35±0.19)s, (2.35±0.19)s; t=3.13, P<0.01). Conclusion:Ephrin-B3 alleviated spontaneous recurrent seizures by upregulating Reelin and p-Dab1 in temporal lobe epilepsy rat.
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Objective:To explore the clinical and electrophysiological characteristics of flail arm syndrome (FAS).Methods:Clinical and electrophysiological data were collected on 13 FAS patients and 31 persons with upper limb onset amyotropic lateral sclerosis (UL-ALS), including the amplitude of compound muscle action potential (CMAP) related to median nerve, ulnar nerve, and axillary nerve motor conduction. A split-hand index (SI) was calculated by dividing the CMAP amplitude of abductor pollicis brevis by that of the abductor digiti minimi. Clinical features, the CMAP amplitudes and SIs were compared between the FAS and UL-ALS patients.Results:Compared with UL-ALS patients, the age at onset among the FAS patients was older (averaging 60.9 years). The development to the second stage was longer (24±6 months). The upper limb reflexes of 15% of the FAS patients had disappeared and those of 77% were weakened, while the lower limb reflexes of 54% of the FAS patients were active and 38% were weakened, significantly different from the UL-ALS patients. However, there were no significant differences in the CMAP amplitudes of the median and ulnar nerves, nor in SI between the FAS and UL-ALS patients. The SIs of the FAS patients with upper motor neuron signs were significantly lower than those of FAS patients without such signs. Among the FAS patients, the average CMAP amplitude of the ulnar nerve was the highest, followed by those of the median and axillary nerves. Among the UL-ALS patients, however, the average CMAP amplitude of the ulnar nerve was not significantly different from that of the axillary nerve.Conclusions:FAS patients with upper motor neuron signs are more likely to have slip hand. The CMAP amplitude of their axillary nerve tends to be lower than that of their median and ulnar nerves. FAS seems to be a special type of ALS.
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Objective@#To study the value of unmethylated cytosine guanine dinucleotide oligodeoxynucleotide (DSP30) and IL-2 in the conventional cytogenetic (CA) detection of the chromosomal aberrations in chronic lymphocytic leukemia (CLL) .@*Methods@#Bone marrow or peripheral blood cells of CLL patients were cultured with DSP30 plus IL-2 for 72 h, following which R-banding analysis was conducted. Fluorescence in situ hybridization (FISH) was performed in 85 patients. CA results were compared with data obtained by FISH.@*Results@#Among 89 CLL patients, the success rate of chromosome analysis was 94.38% (84/89) . Clonal aberrations were detected in 51 patients (51/84, 60.71%) . Of them, 27 (27/51, 52.94%) were complex karyotype. Among 85 CLL patients tested by FISH, chromosomal abnormalities were detected in 74 (74/85, 87.06%) patients, of which 2 (2/74) patients were complex karyotypes, accounting for 2.70%. Of the 85 CLL patients examined by FISH, 50 had abnormal karyotype analysis, 30 had normal karyotype, 5 failed to have chromosome analysis. Among them, 25 cases showed clonal aberrations by FISH assay but normal by CA, and 4 cases were normal by FISH but displayed aberrations in chromosome analysis, and totally 78 (91.76%) cases with abnormality detected by the combination of the two methods. The frequency of 13q- abnormality detected by FISH was significantly higher than that by CA analysis (69.41%vs 16.67%, P<0.001) , while the frequency of 11q-,+12 and 17p- detected by two methods showed no significant difference (P>0.05) . The detection rate of complex abnormalities in conventional karyotype analysis was higher than that in FISH (50.98%vs 2.70%) . In addition, 11 low-risk and 9 intermediate-risk patients according to FISH results showed complex karyotype by cytogenetics, and were classified into high-risk cytogenetic subgroup.@*Conclusion@#DSP30 and IL-2 are effective in improving the detection rate of CA in CLL patients (60.71%) and CA is more effective to detect complex karyotype. However, FISH had a higher overall abnormality detection rate (87.06%) than CA, especially for 13q-. The combination of CA and FISH not only enhanced the detection rate of clonal aberrations to 91.76%, but also provided more precise prognosis stratification for CLL patients, thus to provide more information for clinical implication.
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Objective To investigate the neuroprotective effect of thyroid hormones T3 on cerebral ischemia-reperfusion injury in rats and its mechanism.Methods SD rats were divided into four groups:sham+saline group,sham+T3 group,MCAO+saline group,MCAO+T3 group.The cerebral ischemia-reperfusion injury rat models were established by right middle cerebral artery occlusion.Thyroid hormones(10 μg/100 g)or normal saline were given respectively by intraperitoneal injection twice at 1 h after the onset of ischemia and 6 h after reperfusion.Neurobehavioral score was evaluated at 24 h after reperfusion;TTC staining was used to label infarction area;RT-PCR was used to detect the mRNA level of nerve growth factor(NGF)and brain derived neurotrophic factor(BDNF)in brain tissue;Western blot was employed to determine alterations in protein levels of NGF and BDNF.Results Compared with MCAO+saline group,the neurological deficit and the volume of cerebral infarction of MCAO+T3 group was decreased,and the mRNA and protein expression of NGF and BDNF of MCAO+T3 group were increased(P<0.05).Conclusion Thyroid Hormones could promote the nerve repair,stimulate the nerve regeneration and improve the nervous behavioral function by up-regulating the expression of NGF and BDNF.
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Objective To explore the neuroprotection and mechanisms of bone marrow mononuclear cells (BMMNCs),and evaluate whether ERK1/2 signaling pathway was involved in it.Methods384 healthy male SD rats,which were 6-8 week old,weighting 250-280 g,were selected.The middle cerebral artery occlusion (MCAO) model was established in SD rats using the suture method.The rats were randomly divided into sham operation group,model group,BMMNCs group and ERK1/2 inhibitor group,with 96 rats in each group.At the time of 24 h after the successful modeling,200 μl PBS solution was injected into the caudal vein of the rats in the model group,200 μl PBS solution containing 5×106 BMMNCs was injected into the rats in the BMMNCs group and the ERK1/2 inhibitor group.meanwhile,5 μl PD98059 was injected into the lateral ventricle of the brain of rats in the ERK1/2 inhibitor group.At the time points of 3 d,7 d and 14 d,the modified neurological severity scores (mNSS) was used to evaluate the neurological function,the volume of cerebral infarction was assessed by TTC staining,the pERK1/2,Bax,Bcl-2 and caspase-3 levels were detected by Western blot,and the effect of BMMNCs on activation of microglia was detected by immunofluorescence assay.Results(1)At each time point,the mNSS and the volume of cerebral infarction of the model group were significantly higher than those of the sham operation group (P0.05).(2)At each time point,the pERK1/2,Bcl-2,Bax and caspase-3 protein levels of the model group were significantly higher than those of the sham operation group (P0.05).(3) At each time point,microglia (Iba1 positive) in ischemic penumbra of the BMMNCs group was significantly more than those of the model group,and it was increased with the time extension (P0.05).ConclusionBMMNCs can reduce the apoptosis through ERK1/2 signaling pathway,thus improving the neurological function and reducing the infarct scope.
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Objective To investigate the effect of thyroid hormone(T3)on the expressions of cytochrome c (CytC) and apoptosis?inducing factor(AIF) after cerebral ischemia reperfusion injury in rats and its mechanism. Methods SD male rats were randomly divided into four groups: sham operation group(sham1),sham operation group + T3(sham2) ,ischemia?reperfusion group (IR) ,and thyroid hormone treatment group(T3). A rat model of cerebral ischemia?reperfusion injury was established by right middle cerebral artery occlusion for 2 h,followed by reperfusion for 24 h. Thyroid hormones (10μg/100 g) or normal saline were given at 1 h after onset of ischemia and 6 h after reperfusionby intraperitoneal injection. Neurological deficit scores were evaluated 24 h after reperfusion. Cerebral infarction volume was evaluated by TTC staining. Histological changes was observed by HE staining. Expressions and mRNA levels of CytC and AIF in ischemic brain tissue were evaluated by immunohistochemistry and real?time fluorescent quantitative RT?PCR. Results Ascompared with those in sham operation groups ,the expressions and mRNA levels of CytC and AIFincreased significantlyin IR groups. As compared with those in IR groups ,the indexes were remarkably decreasedin T3 groups (P < 0.01). Nerve function was markedly improved andinfarction area narrowed.Conclusions Thyroid hormone plays a certain role in protection of cerebral ischemia?reperfusion injury in rats,whose mechanism may be associated with inhibition of the expression of apoptosis factors?CytC and AIF.
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Objective To investigate the effect of thyroid hormone on the expression of NF-κB and TNF-oα in the ischemic cortex of rats after focal cerebral ischemia-reperfusion.Methods 96 male SD rats were randomly divided into sham-operation group,sham-operation+T3 group,IR group and IR+T3 group.Using suture legal method to establish a rat model of middle cerebral artery occlusion for 2 h followed by reperfusion.In sham-operation+T3 group and IR+T3 group,T3 was given 3 days before ischemia and 1 hour after ischemia,respectively,intraperitoneal injection T3 10 μg/100 g for rats.Rats in other groups were given the same volume normal saline at the same time.The infarct size was determined by TTC staining at 24 h after reperfusion.HE staining was used to observe the morphological and structural changes of brain tissue.Using Real-time PCR method and immunohistochemical staining method to detect the expression of NF-κB mRNA,TNF-α mRNA and protein in ischemic cortex of rats.Results Compared with sham-operation group and sham-operation+T3 group,the pathological damage of brain tissue in IR group was obvious,while the pathologic damage of IR +T3 group was less than that in IR group.Immunohistochemistry assay showed that the expression of NF-κB was(49.19±5.55)in sham-operation group,(45.75±2.12) in sham-operation+T3 group,(56.88±2.23)in IR group and(50.25±1.67)in IR +T3 group,the expression of TNF-α was (22.50±3.07) in sham-operation group,(24.13±2.03) in sham-operation+T3 group,(37.25±2.82) in IR group and (30.25±1.67) in IR +T3 group,and the NF-κB,TNF-α in IR group were obviously higher than that in sham-operation group and sham-operation+T3 group(P＜0.05),while IR+T3 group were lower than that in IR group(P＜0.05).Real-time PCR showed that NF-κB mRNA,TNF-α mRNA level in IR group was the highest,which was higher than that of sham-operation group and sham-operation+T3 group(P＜0.05),and the NF-κB mRNA,TNF-oα mRNA expression in IR+T3 group were significantly decreased compared with that in IR group(P＜0.05).Conclusion Thyroid hormone has a protective effect on cerebral ischenia reperfusion injury,which may be achieved by reducing the expression of inflammatory factor NF-κB and TNF-oα.
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Objective To investigate the clinical,imaging,pathological and molecular biological features of mitochondrial encephalomyopathy with lactic acidosis and stroke -like episodes(MELAS)in children.Methods The clinical,imaging,pathological and molecular biological features of 1 2 children with MELAS diagnosed through muscle biopsy or gene sequencing in the Fifth Affiliated Hospital of Zhengzhou University from January 201 1 to December 201 5 were retrospectively analyzed.Results (1 )Clinical features:the main manifestations included headache and vomiting in 1 1 cases,epileptic seizures in 9 cases,short stature in 8 cases,hairy in 7 cases,intolerance fatigue in 7 cases,cogni-tive decline in 7 cases,visual disturbance in 6 cases,hearing disturbance in 6 cases,and 5 cases had positive family history.In addition,7 cases had the serum lactic acid level increase in a rest for 1 0 min after exercise.(2)Imaging fea-tures:4 cases showed bilateral basal ganglia calcification symmetry in 8 patients who underwent head CT scan.The most frequently involved parts of the lesion were occipital in 1 0 cases,temporal in 9 cases and parietal lobe in 7 cases in stroke -like episodes.The lesions were lamellar necrosis.The abnormal areas by MRI showed low signal intensity on T1 weighted imaging,high signal intensity on T2 weighted imaging and fluid attenuated inversion recovery,high or equal signal intensity on diffusion weighted imaging,high or low signal intensity on apparent diffusion coefficient;the lactate peak significantly increased on magnetic resonance spectroscopy.The distribution was not in accordance with the control region of the cerebral vessels.Dynamic observation revealed that the lesions were reversible and migratory.(3)Myo-pathological features:muscle biopsy was performed in all children,and ragged -red fibers were found in 1 0 cases by im-proved Gomori staining,strongly succinate dehydrogenase -reactive were found in 9 cases,and the lipid droplets slight-ly increased in 8 cases by oil red O staining.Besides,the crystalline inclusion bodies in mitochondria were arranged in a parking lotpattern in 9 cases by electromicroscope.(4)Molecular biological characteristics:the mitochondrial gene mutations were analyzed in peripheral blood of 9 children and their parents,including 8 cases with A3243G muta-tion and 1 case with G13513A mutation.Five mothers had the same A3243G mutation site in 8 cases.Conclusions Children with MELAS have complex and varied clinical manifestations and certain characteristic of neuroimaging.More-over,muscle pathology and gene sequencing have important diagnostic value.Fully understanding the clinical,muscle pathology,imaging and molecular biological characteristics of children with MELAS can be helpful to the early diagnosis and treatment,also reduce misdiagnosis.
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Objective To explore effects of atorvastatin on the expressions of cyclooxygenase-2(COX-2) and membrane-associated prostaglandin E2 synthase-1 (mPGES-1) in the carotid atherosclerotic plaques of rabbits.Methods Totally 33 male New Zealand white rabbits(≥ 36months of age ) were assigned into normal control group (n=8) and animal model group with carotid atherosclerotic stenosis (n =25).The rabbit models were randomly divided into non-intervention group,celecoxib treatment group (15 mg · kg-1 · d-1,twice daily) and atorvastatin treatment group (5 mg · kg-1 · d-1,once daily) (n=8 each).Four weeks after treatment,the mRNA and protein expressions of COX-2 and mPGES-1 in carotid plaques were determined by RT-PCR and Western blot,respectively.Results The mRNA expressions of COX-2 (0.97±0.09,0.44±0.05,0.60±0.04vs.0.23±0.04,F=66.77,P＜0.01) and mPGES-1 (0.92±0.07,0.41±0.04,0.61±0.03 vs.0.17±0.03,F=54.87,P＜0.01)in carotid atherosclerotic plaques were significantly higher in non intervention group,celecoxib treatment group and atorvastatin treatment group than in normal control group.The mRNA expressions of COX-2 and mPGES-1 were decreased in celecoxib treatment group and atorvastatin treatment group as compared with non-intervention group ( both P ＜ 0.01 ).The protein expressions of COX-2 (0.89±0.06,0.42±0.07,0.62±0.04 vs.0.18±0.05,F=61.75,P ＜0.01) and mPGES-1(0.91±0.05,0.44±0.05,0.63±0.05 vs.0.21±0.04,F=86.44,P＜0.01)in carotid atherosclerotic plaques in non-intervention group,celecoxib treatment group and atorvastatin treatment group were increased as compared with those in normal control group.The mRNA and protein expressions of COX-2 and mPGES-1 were decreased in celecoxib treatment group and atorvastatin treatment group as compared with non-intervention group(all P＜0.01 ).The expressions of COX-2 and mPGES-1 in carotid atherosclerotic plaques were reduced in celecoxib treatment group as compared with atorvastatin treatment group (P ＜ 0.01).Conclusions As COX-2 inhibitor celecoxib,atorvastatin may inhibit the expressions of COX-2 and mPGES-1,and interfere with the inflammatory response which plays key role in the pathological progress of carotid atherosclerotic plaques,and thus slow the progress of carotid atherosclerosis.
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ObjectiveTo investigate the mechanisms and the effects of magnesium Valproate on the expressions of the kinin B1 and B2 receptors in the hippocampus of the juvenile rats submitted to pilocarpine model of epilepsy.Methods 35 healthy Wistar juvenile rats were randomly divided into six groups,that is the model groups:Ⅰ group,Ⅱ group,Ⅲ group,and intraperitoneal injection of saline water control groups:Ⅰ a group,Ⅱ a group,Ⅲ a group,after succession of 15 rats to kindle to establish the model of epilepsy by pilocarpine.To collect hippocampus tissue after the rats were to put to death,and to compared the expression levels of kinin B1 and B2 receptor mRNA by RT-PCR and western blot in the hippocampus of rats.ResultsBy treated with magnesium valproate,kinin B1 receptor mRNA (0.38 ± 0.051 ) and protein expressions(0.58 ± 0.057 ) decreased and kinin B2 receptor mRNA (0.48 ±0.056 ) and protein expressions(0.48 ± 0.044 ) increased in Ⅰ group,compared with that (0.76 ±0.068,0.89 ± 0.034;0.28 ± 0.034,0.32 ± 0.039 ) of Ⅰ a group(P ＜ 0.05 ).Compared with control group,there were more significant upregulation of kinin B1 receptor mRNA and protein expressions (P＜0.05) in the Ⅰ and the Ⅱ groups and there were no alteration in Ⅲ group.The expressional levels of B2 receptor mRNA and protein were upregulated in the Ⅰ,Ⅱ and Ⅲ groups.ConclusionThe kinin B1 and B2 receptor may play a role in the onset and maintenance of epilepsy.The magnesium valproate increased the expressional levels of kinin B2 receptor,and decreased the expressional levels of kinin B1 receptor.
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Objective To explore the expression of vascular endothelial growth factor (VEGF)mRNA and protein in endothelia progenitor cells (EPCs) and VEGF in the culture medium and serum of patients during acute period of cerebral hemorrhage associated with hypertension (APCHH). Methods Mononuclear cells from peripheral blood of patients with APCHH ( 16 patients) and hypertension ( 16 patients) were isolated and induced to EPCs. Semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) analysis was performed to assay VEGF mRNA. VEGF protein was assessed by Western blotting. The VEGF protein level in patient's serum and culture medium ( at day 7 ) were assayed using VEGF ELISA Kit and compared between APCHH group and hypertension group. Results Compared with hypertension group, VEGF mRNA (0. 186 ±0. 035 versus 0.090 ±0.031, t =8.318, P ＜0.0l ) and protein (0. 223 ± 0. 028 versus 0.169 ± 0. 022, t = 3. 744, P ＜ 0. 01 ) expression of EPCs, the concentration of VEGF protein in the supernatant (414 ±37 versus 316 ±29, t =8. 270, P ＜0. 01 ) and in serum (408 ±49versus 222 ±34, t = 12.406, P ＜0. 01 ) were all significantly increased in APCHH group. Conclusion The VEGF protein levels in serum of patients and in the culture medium, VEGF mRNA and protein expression in EPCs were all significantly increased during acute periods of cerebral hemorrhage.
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Objective To explore the influence of cerebral hemorrhage stress on endothelial progenitor cells(EPCs) proliferation and senescence. Methods Mononuclear cells from peripheral blood of patients with cerebral hemorrhage (CH group) and patients with the same underling diseases (control group) as the front were isolated and induced to EPCs. Proliferation, numbers of colonies and cells, senescence of EPCs were checked and compared between the two groups. Results Compared with control group, proliferation (0.270 ± 0. 074 vs 0. 185 ±0.050, t=3.802) ,numbers of colonies( (5. l0 ±0.79) cell/HPF vs ( 1.90 ±0.41 ) cell/HPF, t= 14.407) and cells( (75.15 ± 10.48) cell/HPF vs(57.10 ± 9.28 ) cell/HPF, t = 5. 157 ) of EPCs in CH group on the stress of cerebral hemorrhage were increased significantly (P ＜ 0.01 ), but senescence of EPCs ( (45.54 ± 5.74 ) cells/100 cells vs ( 46.86 ± 5.06 ) cells/100 cells, t = 0. 686 ) in two groups were not different (P ＞ 0.05 ). Conclusion Cerebral hemorrhage stress can increase proliferation of EPCs,but can not change the senescence destiny of EPCs.