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CX3CL1, also known as Fractalkine, is the only member of chemokines CX3C subclass. It plays an important role in a variety of central nervous system diseases and ischemic cerebrovascular diseases by binding to its specific receptor CX3CR1. In recent years, a large number of studies have investigated the specific role and related molecular mechanism of CX3CL1/CX3CR1. This article reviews the effect and molecular mechanism of CX3CL1/CX3CR1 in ischemic cerebrovascular disease, aiming to expand the understanding of the mechanism of CX3CL1/CX3CR1, and provide new ideas and intervention targets for the prevention, diagnosis and treatment of ischemic cerebrovascular disease.
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Objective To investigate the influence of carotid artery stenting (CS)of asymptomatic critical internal carotid artery (ICA)stenosis patients on cognitive function .Methods One hundred and fifty‐six asymptomatic patients with internal carotid arter‐y stenosis(carotid stenosis severity≥70% )were enrolled ,in whom CS was attempted .Functional assessments including alzheimer disease assessment scale‐cognitive subtest (ADAS‐Cog) ,mini‐mental state examination (MMSE) ,and trail making test A(TMTa) and B(TMTb) were done prior to 1 weeks and 3 months after the procedure .Results Successful CS was achieved in all of patients (100% ) ,only 1 patient was lost to follow‐up .There were significant improvement in ADAS‐Cog score(pre 6 .60 ± 2 .04 vs .post 5 .16 ± 1 .63 ,P<0 .01) ,MMSE score (pre 26 .32 ± 1 .06 vs .post 27 .05 ± 1 .46 ,P< 0 .01) ,TMTa (pre 108 .94 ± 17 .42 vs .post 94 .70 ± 20 .27 ,P<0 .01) ,TMTb (pre 178 .65 ± 21 .77 vs .post 148 .92 ± 23 .65 ,P<0 .01) .There was new cerebral infarction dur‐ing 3 months after surgery .Conclusion Asymptomatic critical internal carotid artery (ICA)stenosis may be one reason of cognitive impairment ,and successful CS could improve cognitive function in asymptomatic ICA stenosis .
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Objective To investigate the correlation between the-1562 C/T polymorphism of matrix metalloproteinase-9 (MMP-9) and the risk of ischemic stroke.Methods All the relevant literatures published were searched from PubMed,Embase,MEDLINE,Web of Science as well as CBMdisc and CNKI before May 2013.After extracting data,a meta-analysis of the studies meeting the requirements was conducted by using Review Manager Version 5.0 and Stata 11.0 software.The effect size was pooled and odds ratio (OR) and 95％ confidence interval (CI) were calculated.Results Six studies were enrolled,including 1115 patients and 979 controls.The ORs after pooled analysis (95％ CIs) were C/T vs.C/C:1.10 (0.71-1.71) and T/T vs.C/C:1.78 (0.89-3.57) of the codominant genetic model,respectively; C/T + T/T vs.C/C:1.13 (0.76-1.67) of the dominant genetic model; T/T vs.C/T + C/C:1.79 (0.90-3.57) of the recessive genetic model,which suggested that there was no significant correlation between the-1562 C/T polymorphism of MMP-9 gene and the risk of ischemic stroke.The analysis of 5 studies in Chinese populations showed that the ORs (95％ CIs) of the above 4 genetic models were 1.24 (0.76-2.04),1.43 (0.52-3.92),1.25 (0.80-1.97),and 1.33 (0.49-3.62),respectively.There were also no significant differences.Conclusions According to the analysis of the available literatures,there was no significant correlation between the-1562 C/T polymorphism of MMP-9 gene and the risk of ischemic stroke.
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Atherosclerosis is the important pathologic basis of coronary artery disease,cerebrovascular disease,peripheral arterial disease and other vascular diseases.Studies have shown that the atheromatous plaques occur mainly in regions of curvature,bifurcation,and branching of the artery,indicating that low flow shear stress is closely associated with the occurrence of atherosclerosis.Low flow shear stress involves in the induction of atherosclerosis through acting on mechanosensitive molecules in endothelial cell that transduce mechanical stimuli into chemical signals,activate the corresponding intracellular signaling pathways.This article reviews the relationship between low flow shear stress and atherosclerosis.
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Objective To investigate the effect of the reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase on Toll-like receptor 4 (TLR4)-mediated proinflammatory phenotype of cultured vascular smooth muscle cells (VSMCs) in mice.Methods NADPH oxidase agonist platelet-derived growth factorBB (PDGF-BB) and inhibitor apocynin were used respectively to treat cultured VSMCs from C57BL/6J and TLR4-/-mice.The fluorescent probe 2',7'-dichlorodihydrofluorescein diacetate was used to detect the reactive oxygen species (ROS) level in VSMCs.An enzyme-linked immunosorbent assay was used to detect the expressions of interleukin (IL)-6,IL-1β,and tumor necrosis factor-α (TNF-α) in VSMCs.Tetrazolium blue staining and Boyden chamber assay were used to detect the proliferation and migration of VSMC.Results The ROS levels were increased in VSMCs both from C57BL/6J and TLR4-/-mice after PDGF-BB treatment,and this could be inhibited by apocynin.PDGF-BB pretreatment significantly upregulated the expressions of IL-6 (52.69 ±3.49 ng/ml vs.35.04 ±2.74 ng/ml; P =0.001),IL-1β (79.68 ±2.33 ng/ml vs.62.38 ±0.54 ng/ml;P=0.000),and TNF-α (218.35± 5.42 ng/mlvs.124.74± 4.59 ng/ml; P=0.000) in VSMCs from C57BL/6J mice,and the abilities of proliferation (1.69 ± 0.53 vs.1.04 ± 0.40; P =0.000) and migration (42.11 ±4.05 vs.1.69 ± 0.53; P =0.000) were increased significantly; apocynin pretreatment significantly inhibit the expressions of IL-6 (42.11 ± 4.05 ng/ml vs.52.69 ± 3.49 ng/ml; P =0.010),IL-1β (67.57 ± 1.36 ng/ml vs.79.68 ±2.33 ng/ml; P =0.000) and TNF-α (156.18 ± 6.98 ng/ml vs.218.35 ± 5.42 ng/ml;P =0.000),as well as proliferation (1.23 ±0.42 vs.1.69 ±0.53; P =0.000) and migration (42.11 ±4.05 vs.52.69 ± 3.49; P =0.000).While there were no significant changes in the expressions of IL-6,IL-1β,and TNF-α in VSMCs from TLR4-/-mice after PDGF-BB and apocynin pretreatment.Conclusions NADPH oxidase-derived ROS involved in the TLR4-mediated VSMC inflammatory phenotype as well as proliferation and migration,which may be the important mechanisms of its influencing on the occurrence and development of atherosclerosis.
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In teaching of intra-arterial thrombolysis of ischemic stroke, introducing the method of problem-based learning ( PBL ) to improve the students' learning initiative and stimulate the students' interest in search of knowledge, and guide students to form scientific clinical thinking. Through further participation in surgery, promoting the combination of theory and practice. PBL can help to improve students' ability to analyze and solve problems related to intra-arterial thrombolysis of ischemic stroke.
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Intracranial atherosclerosis is one of the important causes of ischemic stroke. Because extra- and intracranial arteries have differences in the structure and hemodynamics, the effects of traditional vascular risk factors, including sex, age, hypertension, and diabetes mellitus, on extra-and intracranial atherosclerosis are also different. The early identification of the risk factors for intracranial atherosclerosis has important significance for aggressively preventing and treating intracranial atherosclerosis and reducing the incidence of ischemic stroke. However, many research conclusions aiming at the risk factors and intracranial ng andatherosclerotic correlation are not consistent. This article reviews the research status quo of the risk factors for intracranial atherosclerosis.
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Objective To observe the dynamic changes of serum inflammatory factors after vertebral artery stenting and to investigate its clinical significance. Methods A total of 48 patients treated with vertebral artery stenting were included, and 48 patients only received cerebral angiography were used as a control group. The levels of soluble intercellular adhesion molecule-1 (sICAM-1), high-sensitivity C-reactive protein (hs-CRP) and tumor-necrosis factor-α (TNF-α) were detected before procedure (angiography), at 24 h, 48 h, 3 d, and 1 and 3 weeks after procedure (angiography). Results The serum levels of hs-CRP (4. 85 ± 0. 53 mg/L vs. 2. 57 ±0. 36 mg/L,P＜0. 05), TNF-α (2.42 ±0. 34 μg/L vs. 1. 08 ±0. 37 μg/L,P ＜0. 05) and sICAM-1 (449.43 ± 47. 16 μg/L vs. 269. 15 ± 37. 46 μg/L, P ＜ 0. 05) at 24 hours after procedure in the stenting group were significantly elevated compared with those before procedure. The Hs-CRP level (6.24 ± 0.59 mg/L) reached the peak at 48 hours after procedure. At week 3 (2. 51 ±0.29 mg/L), it returned to the level before procedure (2. 57 ±0. 36 mg/L); TNF-α level reached the peak at day 3 (2.30 ± 0.25 μg/L), and it remained higher level at week 3 (1. 89 ±0. 13 μg/L); the sICAM-1 level continued to rise at week 3 (296. 95 ± 59. 72 μg/L). The serum hs-CRP, TNF-α and sICAM-1 levels at 24 hours after procedure in the stenting group were significantly higher than those (3. 25 ±0.40 mg/L、J. 18 ±0. 19 μg/L and 336. 57 ± 50. 18μg/L) in the control group (all P＜0.05). Conclusions The serum hs-CRP, TNF-α, sICAM-1 levels were significantly elevated after vertebral artery stenting. It was suggested that the stenting caused a longer duration of inflammatory response.
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Objective To investigate the efficacy of intra-arterial thrombolysis with stenting for acute cerebral infarction. Methods Using a prospective case-control design, 24 patients with acute cerebral infarction who remained angiostegnosis ( ＞ 50%) after intra-arterial thrombolysis were randomly divided into stent treatment group and drug treatment group. They were treated with stenting + drug treatment and conventional drug treatment. The rates of vascular complete revascularization and residual stenosis, and the modified Rankin scale scores at 3 months in both groups were evaluated. Results The rate of complete revascularization in the stent treatment group was significantly higher than that in the drug treatment group (54. 5% vs.0%,χ2 =6.382, P ＜0. 001), and the rate of residual stenosis was significantly lower than that in the drug treatment group ([4.5 ±5.2]% vs. [82. 5 ±10. 5]%, t =7.464, P＜0.001). The rate of favorable clinical outcome in the stent treatment group was significantly higher than that in the drug treatment group (100% vs. 76. 9%,χ2 = 14. 263, P = 0.038). Conclusion The efficacy of intra-arterial thrombolysis with stenting in the treatment of acute cerebral infarction is superior to that in the drug treatment group, and it is safer.
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Objective To evaluate the effect of vertebral artery kinking on cerebral hemodynamics. Methods The patients with vertebral artery kinking on digital subtraction angiograph (DSA) were selected from 223 patients with vertebral-basilar artery transient ischemic attack, then the changes of vertebral artery hemodynamics were evaluated using transcranial color Doppler (TCD). Results There were 84 patients with vertebral artery kinking among 223 patients with vertebral-basilar artery transient ischemic attack. Patients with vertebral artery kinking were older and had more vascular risk factors than patients without vertebral artery kinking. Compared with the control group, patients showed decreased blood flow rate such as peak velocity (Vp) and mean velocity (Vm), increased pulsatility index (PI) and resistant index (RI) in vertebral artery kinking group. Conclusions Vertebral artery kinking is common abnormal artery among patients with vertebral-basilar artery transient ischemic attack, it leads to hemodynamic changes. Age and vascular risk factors are potential causes of vertebral artery kinking.
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OBJECTIVE: We investigated the development of the studying of bone marrow mesenchymal stem cells (MSCs) and elucidated the feasibility of gene therapy for Parkinson's disease. DATA SOURCES: Using the key terms "mesenchymal stem cells, Parkinson disease, gene transfer", we searched the MEDLINE database for the articles published in English from January 2000 to December 2005. Meanwhile, Wanfang database was retrieved for the relevant articles published during the same period, with the keywords of "Parkinson's disease, gene therapy, gene transfer, mesenchymal stem cells" in Chinese. STUDY SELECTION: All articles were selected firstly and those were relevant to gene therapy of Parkinson disease, differentiation of MSCs into nerve stem cells, or the therapy of MSCs transplantation for Parkinson disease. DATA EXTRACTION: A total of 158 articles including 32 Chinese and 126 English were collected, finally 30 articles of them were included. DATA SYNTHESIS: Parkinson disease is a very normal disorder of central nerve systematic degeneration, which pathological change is the damage of dopamine neuron in substantia nigra. Nowadays the systematic study of Parkinson disease indicates that transplantation of MSCs has a potential prospective application. Due to the autospecific superiority, MSCs become an engineering cell of Parkinson disease therapy. In recent years there are a lot of researches on genetic modification about MSCs that involved in gene therapy as an ideal target cell. MSCs can improve the dopamine synthesis and decrease the death of dopaminergic neuron. Target gene encoding enzymes in the route of dopamine synthesis, such as Tyrosine Hydroxylase, Aromatic L-Aminoacid Decarboxylase and neural protective molecule including neurotrophic factor and anti-apoptosis protein, is in the state of animal experiments, which provide great space for treating neurodegenerative disease-Parkinson disease. CONCLUSION: As MSCs are the plentiful sources of engineering cells, which have an extensive prospective application, it has potential clinical value in treating Parkinson disease, especially in gene therapy of Parkinson's disease.
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To study the current situation and affecting factors of bilingual teaching for Neurology,we investigated the students of a five-year medical undergraduade in clinical medicine with a questionaire.It will provide the data and reference to effectively improve bilingual teaching program for Neurology.
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BACKGROUND:With the trend of population aging,the morbidity of cognitive dysfunction has been gradually increased.People start to pay attention to the impact of smoking to cognitive dysfunction. OBJECTIVE:To investigate the effects of smoking on cognitive dysfunction in elder people,and explore the possibility of intervention. DESIGN:Randomized cluster sampling. SETTING:Neurology Department of a hospital. PARTICIPANTS:A total of 3 012 old people aged above 60 year were selected from two resident committees by drawing from Gaoxin district,Yubei district and Yuzhong district of Chongqing in which there were 1 668 males and 1 344 females. METHODS:Mini mental state examinate(MMSE) was used to assess cognitive function.t test and Logisitc regression were used to analyze the information. RESULTS:MMSE assessment was conducted to 3 012 people,the total smoking rate was 35% .The abnormality rate of cognitive function in aged people of Chongqing was 11.95% .Among smoking population,11.8% of the currently smoking people and 4.5% of previously smoking people suffered from the cognitive dysfunction while 5.3% of the non smoking people got cognitive dysfunction. CONCLUSION:Smoking is closely correlated with cognitive dysfunction(χ 2=6.59,P=0.047) and education background, age, occupation and sex are the influencing factors of cognitive dysfunction.Current smoking people get higher risk to suffer cognitive dysfunction(RR=2.33,95% CI=1.37- 5.82).Smoking is an important risk factor for cognitive dysfunction in aged people so that it will be an effective strategy for aged people to reduce the incidence of cognitive dysfunction by quitting smoking.
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BACKGROUND: Pro-inflammatory cytokines can promote the expression nof intercellular adhesion molecule-1 (ICAM-1), and the adhesion of white cells to intravascular endothelium, thereby involving in the developing ischemic stroke.OBJECTIVE: To investigate the prognostic value of soluble intercellular adhesion molecule-1 (sICAM-1) and its relative factors in the developing ischemic stroke.DESIGN: Randomized controlled study based on patients.SETTING: Department of neurology, the field surgery research institute in a military hospital of Chinese PLA.PARTICIPANTS: Between January 1st and December 31st 2000, total 238patients with ischemic stroke received treatment at the Neurological Department of the Third Affiliated Hospital, the Third Military Medical University of Chinese PLA, including 117 males and 121 females, amongst which 186cases were confirmed of none-developing ischemic stroke and 52 cases developing ischemic stroke.INTERVENTIONS: After hospitalization, patients were subject to daily neurological examination, Canada stroke score(CSS), temperature and white blood cell(WBC) counting, sICAM was examined at 1, 3 and 7 days after hospitalization.correlative factors between developing ischemic stroke and non-developing ischemic stroke at 24 hours 3 days and 7 days after the onset of stroke.RESULTS: Within 24 hours from the onset of stroke, the number of WBC was[(8.4 ± 1.2) × 109 L-1] in developing ischemic stroke group, with blood glucose of[ (45.8 ± 5.1) g/L], fibrinogen of[ (64. 6 ± 5. 1) g/L] and sICAM-1 of[ (261.4 ± 9. 7) μg/L], which were obviously higher than the corresponding[(6.7±1.3) ×109 L-1, (36.2±5.5) g/L, (44.0±6.2) g/L,(223. 1 ± 8.4) μg/L] in non-developing ischemic stroke group, the difference was of statistical significance( t = 2. 368 - 2. 387, P ＜ 0. 01 ) . The results of multiple factor analysis on developing ischemic stroke indicated that serum sICAM-1 was a risk factor independent of higher blood glucose,fibrinogen and CSS, and was obviously correlated with developing ischemic stroke( OR =2.9, 95% CI= 1.4 -6. 3) . There was significant change in sICAM-1, the number of WBC, blood glucose and fibrinogen at 24 hours, 3days and 7 days, as well as the scores for CSS at hospitalization in developing ischemic stroke group, which were significantly different from non-developing ischemic group( t = 2. 345 - 2. 878, P ＜ 0.01 ).CONCLUSION: sICAM-1 was proved obviously correlated with developing ischemic stroke, and can be used as a prognostic factor.
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BACKGROUND: The number of dementia patients ceaselessly increases with the extension of the life expectancy and the ageing of the population; hence the survival rate of patients with post-stroke dementia(PSD) has become an important issue of public health. Although it is generally believed that dementia could shorten human life expectancy, there is rare report regarding the impact of PSD on the survival rate of the patients in developing countries.OBJECTIVE: To investigate the impacts of ischemic dementia on the survival rate of the patients to explore the risk factors that would affect the survival rate of patients after cerebral infarction(CI).DESIGN: A prospective randomized controlled study based on patients.SETTING: The second department of neurology of a field surgery institute in a military university hospital of Chinese PLA.PARTICIPANTS: Totally 619 cases of acute CI including 313 males and 306 females aged between 55 and 85 years old[mean of (70. 3 ±9.5) years old] were selected form the Department of Neurology of the Daping Hospital of the Third Military Medical University of Chinese PLA between 1st May 1998 and 28th December 1999.INTERVENTIONS: Data including human factor, vascular factor and CI characters of 619 cases of ischemic cerebral stroke were collected and they also received neuropsychological test. Dementia was diagnosed in CI patients at admission and 3 months after CI according to DSM-Ⅳ criteria. Two-year follow up was conducted for the analysis of survival rate in PSD patients and survival-correlated predicting factors.and survival rate in CI patientsRESULTS: Totally 146 total patients(23.6% ) were diagnosed as PSD at 3 month after CI, of which 39 cases were pre-stroke dementia and 107 cases were CI-correlated dementia. The survival rate of PSD patients was 49.3%after(19.4 ±8.3) months of follow-up. The survival rate of patients with CI-correlated dementia was 53.7% while the non-dementia patients was 92.0% after(21.3 ± 9.1 ) months of follow-up. There was significant correlation between PSD and survival rate as indicated by multifactor analysis ( RR = 4. 91, 95% CI = 3.85 - 13.49) . The rest predicting factors included age(RR=1. 12, 95% CI=1.06-1.18), BarthelIndex(BI, RR=1.63,95% CI=1.15-2.31), auricular fibrillation(AF, RR=1.47, 95%CI = 1.17 - 1.85) and CI history( RR = 2. 81, 95% CI = 1.53 - 5.16).CONCLUSION: Dementia could reduce the survival rate of CI patients and it could be set as a predicting factor for post-infarction survival rate.
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BACKGROUND: The presence of cognitive impairment following stroke onset strongly indicates poor prognosis of the patients surviving the crisis.Understanding of the incidence of cognitive impairment after ischemic stroke and its confidence interval has practical significance in preventing is occurrence in stroke patients and its differentiation from age-related cognitive impairment.OBJECTIVE: To study the incidence of cognitive impairment in patients with the first onset of ischemic stroke.DESIGN: Single-factor analyses of the cases followed up for 3 months SETTING: Research Institute of Surgery, Daping Hospital, Third Military Medical University of Chinese PLA.PARTICTPANTS: Totally 434 inpatients with acute cerebral infarction [218 male and 216 female, aged 55 to 85 with a mean of (70.3±9.5) years]admitted within 48 hours after the onset in Department of Neurology, Daping Hospital of Third Military Medical University from May 8, 1999 to December 31, 2000. All patients participated in this study voluntarily.METHODS: The general background and clinical data of the patients were collected at the time of admission. A simplified intelligence test was performed both 7 to 10 days of the onset and 3 months after discharge. The scale employed for the test included 20 questions with a total of 30 items divided to test 5 aspects of the patients' cognition, namely orientation ability, memory, calculation ability, memory recall and linguistic ability (1 point was given for a correct answer, and 0 for an wrong one or an answer of "I don't know", with the total score of 30 for all items). A score of the simplified intelligence test less than the score of demarcation (specifically,below 17 for illiterate patients, below 20 for those receiving an education no more than 6 years, and below 24 for those having an education for no less than 7 years) for 3 months after cerebral stroke was regarded as the diagnostic criteria for cognitive impairment.MAIN OUTCOME MEASURES: The incidence of cognitive impairment was recorded 3 months after hospital discharge and single-factor analysis of the scores of simple intelligence test.RESULTS: All the 434 patients were included in result analysis. Totally 161 (37.1%) patients were diagnosed as having cognitive impairment, and 273 (62.9%) had normal cognitive function 3 months after hospital discharge. The mean age of the patients with cognitive impairment was significantly higher than that of the patients with normal cognitive function [(73.0±7.0) years vs (64.5±6.6) years, t=2.626, P ＜ 0.01]. The proportion of patients with cognitive impairment receiving education for no more than 6 years was significantly higher than that among patients with normal cognition (45.3% vs 22.7%, OR=2.823, with 95% confidence interval of 1.855 -4.297), and the score of simple intelligence test was significantly lower in the former patient group (16.3±8.7 vs 23.4±4.2, t=3.352, P ＜ 0.001).CONCLUSION: The incidence of cognitive impairment in this cohort is relatively high. The patients with cognitive impairment following cerebral infarction have obviously older age and poorer education, suggesting significant synergetic effect of age and education with cognitive impairment following cerebral infarction.
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Objective To observe the effect of peroxisome proliferators activated receptor gamma(PPAR-?)on phenotypic transforming of vascular smooth muscle cells(VSMC)in hypertension.Methods Spontaneous hypertension rats(SHR)and WKY rats both aged 4 months were included.SHR rats as well as WKY rats were divided to be fed with normal chow,and chow added with rosiglitazone(10 mg?kg-1?d-1)for 16 weeks.VSMC were isolated from SHR rats and WKY rats and cultured by patch-attaching method,then respectively divided into 3 groups after treated with genetic recombination technology:normal VSMC,PPAR? overexpressed VSMC and PPAR? silenced VSMC.Expressions of OPN and ?-SMA,which respectively represent the undifferentiated and differentiated VSMC,were detected by Western blotting.Cell proliferation was determined by detecting DNA synthesis and cell counting.The changes of arteries were evaluated pathologically.Results Rosiglitazone decreased blood pressure and ameliorated vascular remodeling of aorta in SHR rats.Aorta of SHR showed an upregulation of OPN and downregulation of ?-SMA,which could be inhibited by rosiglitazone.VSMC from SHR rats showed an upregulation of OPN and downregulation of ?-SMA,and increased cell proliferation.These changes were all inhibited by rosiglitazone.In the cells that overexpressed PPAR?,the cell proliferation rate was lower,and the expressions of OPN and ?-SMA were depressed,compared with the corresponding control cells.Conclusion PPAR-? could inhibit the phenotypic transforming of VSMC,and this might be responsible for the amelioration of vascular remodeling in hypertension.