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1.
Lipids Health Dis ; 20(1): 151, 2021 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-34727932

RESUMO

BACKGROUND: Acylcarnitine is an intermediate product of fatty acid oxidation. It is reported to be closely associated with the occurrence of diabetic cardiomyopathy (DCM). However, the mechanism of acylcarnitine affecting myocardial disorders is yet to be explored. This current research explores the different chain lengths of acylcarnitines as biomarkers for the early diagnosis of DCM and the mechanism of acylcarnitines for the development of DCM in-vitro. METHODS: In a retrospective non-interventional study, 50 simple type 2 diabetes mellitus patients and 50 DCM patients were recruited. Plasma samples from both groups were analyzed by high throughput metabolomics and cluster heat map using mass spectrometry. Principal component analysis was used to compare the changes occurring in the studied 25 acylcarnitines. Multivariable binary logistic regression was used to analyze the odds ratio of each group for factors and the 95% confidence interval in DCM. Myristoylcarnitine (C14) exogenous intervention was given to H9c2 cells to verify the expression of lipid metabolism-related protein, inflammation-related protein expression, apoptosis-related protein expression, and cardiomyocyte hypertrophy and fibrosis-related protein expression. RESULTS: Factor 1 (C14, lauroylcarnitine, tetradecanoyldiacylcarnitine, 3-hydroxyl-tetradecanoylcarnitine, arachidic carnitine, octadecanoylcarnitine, 3-hydroxypalmitoleylcarnitine) and factor 4 (octanoylcarnitine, hexanoylcarnitine, decanoylcarnitine) were positively correlated with the risk of DCM. Exogenous C14 supplementation to cardiomyocytes led to increased lipid deposition in cardiomyocytes along with the obstacles in adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) signaling pathways and affecting fatty acid oxidation. This further caused myocardial lipotoxicity, ultimately leading to cardiomyocyte hypertrophy, fibrotic remodeling, and increased apoptosis. However, this effect was mitigated by the AMPK agonist acadesine. CONCLUSIONS: The increased plasma levels in medium and long-chain acylcarnitine extracted from factors 1 and 4 are closely related to the risk of DCM, indicating that these factors can be an important tool for DCM risk assessment. C14 supplementation associated lipid accumulation by inhibiting the AMPK/ACC/CPT1 signaling pathway, aggravated myocardial lipotoxicity, increased apoptosis apart from cardiomyocyte hypertrophy and fibrosis were alleviated by the acadesine.


Assuntos
Carnitina/análogos & derivados , Diabetes Mellitus Tipo 2/complicações , Cardiomiopatias Diabéticas/metabolismo , Metabolismo dos Lipídeos , Adulto , Aminoimidazol Carboxamida/análogos & derivados , Aminoimidazol Carboxamida/farmacologia , Animais , Biomarcadores/sangue , Carnitina/sangue , Carnitina/química , Carnitina/farmacologia , Linhagem Celular , Diabetes Mellitus Tipo 2/metabolismo , Feminino , Humanos , Metabolismo dos Lipídeos/efeitos dos fármacos , Masculino , Espectrometria de Massas , Pessoa de Meia-Idade , Mioblastos Cardíacos/efeitos dos fármacos , Mioblastos Cardíacos/metabolismo , Ácidos Mirísticos/farmacologia , Ratos , Estudos Retrospectivos , Ribonucleosídeos/farmacologia , Fatores de Risco
2.
J Headache Pain ; 20(1): 93, 2019 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-31477012

RESUMO

BACKGROUND: Increasing evidence has suggested that the cerebellum is associated with pain and migraine. In addition, the descending pain system of the brainstem is the major site of trigeminal pain processing and modulation and has been discussed as a main player in the pathophysiology of migraine. Cerebellar and brainstem structural changes associated with migraineurs remain to be further investigated. METHODS: Voxel-based morphometry (VBM) (50 controls, 50 migraineurs without aura (MWoAs)) and diffusion tensor imaging (DTI) (46 controls, 46 MWoAs) were used to assess cerebellum and brainstem anatomical alterations associated with MWoAs. We utilized a spatially unbiased infratentorial template toolbox (SUIT) to perform cerebellum and brainstem optimized VBM and DTI analysis. We extracted the average diffusion values from a probabilistic cerebellar white matter atlas to investigate whether MWoAs exhibited microstructure alterations in the cerebellar peduncle tracts. RESULTS: MWoAs showed decreased fractional anisotropy (FA) in the vermis VI extending to the bilateral lobules V and VI of the cerebellum. We also found higher axial diffusivity (AD), mean diffusivity (MD), and radial diffusivity (RD) in the right inferior cerebellum peduncle tract in MWoAs. MWoAs exhibited both reduced gray matter volume and increased AD, MD and RD in the spinal trigeminal nucleus (SpV). CONCLUSION: MWoAs exhibited microstructural changes in the cerebellum and the local brainstem. These structural differences might contribute to dysfunction of the transmission and modulation of noxious information, trigeminal nociception, and conduction and integration of multimodal information in MWoAs. These findings further suggest involvement of the cerebellum and the brainstem in the pathology of migraine without aura.


Assuntos
Tronco Encefálico/patologia , Cerebelo/patologia , Enxaqueca sem Aura/patologia , Anisotropia , Tronco Encefálico/diagnóstico por imagem , Cerebelo/diagnóstico por imagem , Imagem de Tensor de Difusão , Feminino , Substância Cinzenta/diagnóstico por imagem , Substância Cinzenta/patologia , Humanos , Masculino , Enxaqueca sem Aura/diagnóstico por imagem , Núcleo Espinal do Trigêmeo/diagnóstico por imagem , Núcleo Espinal do Trigêmeo/patologia , Substância Branca/diagnóstico por imagem , Substância Branca/patologia
3.
Anal Biochem ; 520: 9-15, 2017 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-28024754

RESUMO

An electrochemical sensor with high selectivity in addition to sensitivity was developed for the determination of cardiac troponin I (cTnI), based on the modification of cTnI imprinted polymer film on a glassy carbon electrode (GCE). The sensor was fabricated by layer-by-layer assembled graphene nanoplatelets (GS), multiwalled carbon nanotubes (MWCNTs), chitosan (CS), glutaraldehyde (GA) composites, which can increase the electronic transfer rate and the active surface area to capture a larger number of antigenic proteins. MWCNTs/GS based imprinted polymers (MIPs/MWCNTs/GS) were synthesized by means of methacrylic acid (MAA) as the monomer, ethylene glycol dimethacrylate (EGDMA) as the cross linker α,α'-azobisisobutyronitrile (AIBN) as the initiator and cTnI as the template. In comparison with conventional methods, the proposed electrochemical sensor is highly sensitive for cTnI, providing a better linear response range from 0.005 to 60 ng cm-3 and a lower limit of detection (LOD) of 0.0008 ng cm-3 under optimal experimental conditions. In addition, the electrochemical sensor exhibited good specificity, acceptable reproducibility and stability. Moreover, satisfactory results were obtained in real human serum samples, indicating that the developed method has the potential to find application in clinical detection of cTnI as an alternative approach.


Assuntos
Técnicas Eletroquímicas , Grafite/química , Impressão Molecular , Nanoestruturas/química , Nanotubos de Carbono/química , Troponina I/análise , Carbono/química , Eletrodos , Humanos , Limite de Detecção , Microscopia Eletrônica de Varredura , Miocárdio/metabolismo , Polímeros/química , Reprodutibilidade dos Testes , Espectroscopia de Infravermelho com Transformada de Fourier
4.
J Stroke Cerebrovasc Dis ; 24(8): e205-7, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26123876

RESUMO

BACKGROUND: Here we report a rare case of repeated transient Wallenberg's syndrome and discuss its mechanism. METHODS: Case report and literature review. RESULTS: A 57-year-old man was admitted for 1.5-month repeated transient Wallenberg's syndrome, including right-sided Horner's syndrome, lower limb weakness, and paresthesia on the right side of the body and face. His symptom appeared mostly during physical activity. Symptoms occurred nearly everyday and lasted from 5 minutes to 30 minutes. His cranial magnetic resonance imaging (MRI) including diffusion-weighted MRI imaging was normal, and his cervical contrast-enhanced magnetic resonance angiography reflected right vertebral artery hypoplasia. Twenty-four-hour electrocardiogram and electroencephalography showed no abnormalities. Echocardiography showed aortic valve calcification with moderate aortic stenosis, moderate aortic insufficiency, and dilated aorta. Dual-antiplatelets or warfarin (international normalized ratio reached 2.07) were not effective to reduce the attacks. CONCLUSIONS: Hemodynamic instability due to valve disease combined with right vertebral artery hypoplasia could lead to transient Wallenberg's syndrome. Antithrombotics are often ineffective for this kind of patients and the best therapy for them could be to cure their valve disease. Repeated transient Wallenberg's syndrome is rare and that caused by ipsilateral vertebral artery hypoplasia and severe valve disease has not been reported up till now to our knowledge, so it will widen the knowledge on etiologies of transient ischemic attacks and provide information and reference to cardiologists and neurologists in diagnosis and treatment for patients with similar clinical manifestations.


Assuntos
Lateralidade Funcional , Cardiopatias Congênitas/complicações , Doenças das Valvas Cardíacas/complicações , Síndrome Medular Lateral/complicações , Artéria Vertebral/patologia , Valva Aórtica , Doença da Válvula Aórtica Bicúspide , Ecocardiografia , Síndrome de Horner/etiologia , Humanos , Angiografia por Ressonância Magnética , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade
5.
J Org Chem ; 79(6): 2473-80, 2014 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-24559389

RESUMO

The catalytic enantioselective and divergent total syntheses of Aspidosperma alkaloids (+)-10-oxocylindrocarpidine 7, (+)-cylindrocarpidine 1, (-)-N-acetylcylindrocarpinol 6, and (+)-aspidospermine 8 have been accomplished in 11 steps from a common precursor (15) on the basis of a highly concise route. The route features three metal-catalyzed reactions, including the key Pd-catalyzed decarboxylative asymmetric allylation of carbazolones developed in our laboratory. Our syntheses, using a combination of C-H activation, enantioselective catalysis, and collective synthesis, represent the first total synthesis of 10-oxocylindrocarpidine and the first asymmetric total synthesis of cylindrocarpidine and N-acetylcylindrocarpinol.


Assuntos
Alcaloides/síntese química , Aspidosperma/química , Alcaloides Indólicos/síntese química , Quinolinas/síntese química , Alcaloides/química , Catálise , Alcaloides Indólicos/química , Estrutura Molecular , Quinolinas/química , Estereoisomerismo
6.
J Org Chem ; 78(22): 11444-9, 2013 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-24131444

RESUMO

Evolution of the synthetic strategy that culminated in the first asymmetric total synthesis of the Aspidosperma alkaloid limaspermidine is described. The successful enantioselective route to (-)-limaspermidine proceeds in 10 steps and with the isolation of only six intermediates using a Pd-catalyzed enantioselective decarboxylative allylation we have recently developed. This first enantioselective synthesis of (-)-limaspermidine establishes unambiguously its absolute configuration and allows the first asymmetric formal total synthesis of the Aspidoalbine alkaloid (-)-1-acetylaspidoalbidine.


Assuntos
Alcaloides Indólicos/síntese química , Alcaloides Indólicos/química , Estrutura Molecular , Estereoisomerismo
7.
BMC Neurosci ; 13: 154, 2012 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-23272656

RESUMO

BACKGROUND: There are two widely used transient middle cerebral artery occlusion (MCAO) methods, which differ in the use of unilateral or bilateral carotid artery reperfusion (UNICAR and BICAR). Of the two methods, UNICAR is easier to perform. This study was designed to comprehensively compare the two reperfusion methods to determine if there are any differences in outcomes. RESULTS: The UNICAR and BICAR groups each included 9 rats. At baseline, the average pO(2) was 20.54 ± 9.35 and 26.43 ± 7.39, for the UNICAR and BICAR groups, respectively (P = 0.519). Changes in pO(2), as well as other physiological parameters measured within the ischemic lesion, were similar between the UNICAR and BICAR groups during 90 min of MCAO and the first 30 min of reperfusion (all P > 0.05). Furthermore, both the Bederson score and Garcia score, which are used for neurological assessment, were also similar (both P > 0.05). There were also no significant differences in T2WI lesion volume, DWI lesion volume, PWI lesion volume, or TTC staining infarct volume between the two groups (all P > 0.05). CONCLUSION: UNICAR and BICAR have similar capability for inducing acute brain ischemic injury and can be considered interchangeable up to 24 hours after reperfusion.


Assuntos
Circulação Cerebrovascular/fisiologia , Infarto da Artéria Cerebral Média/patologia , Traumatismo por Reperfusão/patologia , Reperfusão/métodos , Animais , Imagem de Difusão por Ressonância Magnética/métodos , Modelos Animais de Doenças , Infarto da Artéria Cerebral Média/mortalidade , Infarto da Artéria Cerebral Média/fisiopatologia , Masculino , Neuroimagem/métodos , Exame Neurológico , Ratos , Ratos Sprague-Dawley , Traumatismo por Reperfusão/mortalidade , Traumatismo por Reperfusão/fisiopatologia , Índice de Gravidade de Doença , Fatores de Tempo
8.
J Pain ; 21(3-4): 347-354, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31400473

RESUMO

The brainstem has been discussed as the main player in the pathogenesis of migraine. Dysfunctional brainstem nuclei and their abnormal connections to other key brain centers may contribute to headache and other symptoms of migraine. In the present study, 32 patients with migraine without aura (MWoA) and 32 age- and sex-matched healthy controls (HCs) underwent resting-state fMRI scans. We used masked independent analysis (mICA) to investigate whether patients with MWoA exhibited abnormal brainstem nuclei-cortical functional connectivity (FC). The mICA can suppress adjacent physiological noise and prevent results from being driven by the much stronger signals of the surrounding structures. Regional homogeneity (ReHo) was used to investigate whether the brainstem regions with abnormal FC to other brain areas exhibited abnormal regional neuronal activity. Patients with MWoA showed significantly weaker FC between the posterior pons and the left superior parietal lobule, the left middle temporal gyrus, and the left middle frontal gyrus. Furthermore, patients with MWoA exhibited significantly decreased ReHo values in the posterior pons compared with HCs, and the posterior pons ReHo value was significantly negatively correlated with HIT-6 scores in the MWoA group. Patients with MWoA exhibited functional abnormalities in the posterior pons and weakened connections between the posterior pons and several key cortical brain areas involved in pain processing during the resting state. PERSPECTIVE: This study provided increased evidence that the pons is involved in the pathophysiological mechanism of migraine, and weakened connections suggest that the touch and pain sensation of migraine sufferers may not be properly relayed to cortical processing areas, which may be associated with the pathogenesis of MWoA.


Assuntos
Córtex Cerebral/fisiopatologia , Conectoma , Enxaqueca sem Aura/fisiopatologia , Ponte/fisiopatologia , Adulto , Córtex Cerebral/diagnóstico por imagem , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Enxaqueca sem Aura/diagnóstico por imagem , Ponte/diagnóstico por imagem , Adulto Jovem
9.
J Neurol ; 266(7): 1578-1587, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30923933

RESUMO

Parkinson's disease (PD) is a progressive neurological degenerative disorder characterized by impaired motor function and non-motor dysfunctions. While recent studies have highlighted the role of the cerebellum in PD, our understanding of its role in PD remains limited. In the present study, we used resting-state fMRI to evaluate dysfunctions within the cerebellum in PD patients treated with medication and drug-naïve PD patients. We applied amplitude of low-frequency fluctuation (ALFF) and degree centrality (DC) analysis methods. Thirty-one patients with early stage PD (22 drug-naïve and 9 medicated patients) and 31 gender- and age-matched healthy controls were recruited in this study. ALFFs increased in the left cerebellar areas (lobules VI/VIIb/CruI/CruII and the dentate gyrus) and right cerebellar areas (lobules VI/VIIb/VIIIa/CruI/CruII and the dentate gyrus) of all PD patients and in the left and right cerebellar areas (lobules VI/VIIb/CruI and the dentate gyrus) of drug-naive PD patients but were not significantly changed in medicated PD patients. DC increased in the right cerebellar areas of all PD patients and medicated PD patients. All PD patients and all drug-naive PD patients showed significantly weaker functional connectivity (FC) between the left cerebellum and the left medial frontal gyrus. However, FC was significantly stronger between the right cerebellum and the left precentral and right middle occipital gyri in the medicated PD patients than in controls. Furthermore, a correlation analyses revealed that ALFF z scores in the left cerebellum (lobule VI) and right cerebellum (lobule VI/CruI and dentate gyrus) were negatively correlated with Mini-Mental State Examination (MMSE) scores in all PD patients and drug-naive patients. These results indicate that the cerebellum plays an important role in PD, mainly by exerting a compensatory effect in early stage PD. Additionally, antiparkinsonian medication would modified PD-induced changes in local neural activity and FC in PD patients. The results of this study offer novel insights into the roles of the cerebellum in early stage drug-naïve PD.


Assuntos
Antiparkinsonianos/uso terapêutico , Cerebelo/anormalidades , Cerebelo/diagnóstico por imagem , Imageamento por Ressonância Magnética , Doença de Parkinson/diagnóstico por imagem , Doença de Parkinson/tratamento farmacológico , Idoso , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade
10.
PLoS One ; 13(11): e0207448, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30485326

RESUMO

BACKGROUND: Botulinum toxin type A (BoNT-A) is generally considered safe and is widely used to treat a variety of clinical conditions involving muscle hyperactivity and for cosmetic purposes. However, the effects of BoNT-A poisoning (botulism) on brain function are poorly understood. METHODOLOGY/PRINCIPAL FINDINGS: Herein, we investigated brain functions in 9 patients who received illegal cosmetic injections of botulinum and 18 matched controls by combining the analysis methods of regional homogeneity (ReHo) and amplitude of low-frequency fluctuation (ALFF) based on resting-state fMRI. Compared with the controls, the patients with botulism exhibited significantly reduced ReHo values in the left posterior lobe of the cerebellum extending to the right anterior lobe of the cerebellum, as well as in the right anterior lobe of the cerebellum extending to the parahippocampal gyrus and right posterior lobe of the cerebellum. The patients with botulism also showed weakened ALFF values in the right anterior lobe of the cerebellum extending to the left anterior lobe of the cerebellum and right posterior lobe of the cerebellum, as well as in the right anterior lobe of the cerebellum. CONCLUSIONS/SIGNIFICANCE: The results indicate that BoNT-A may modulate cerebral activation in specific areas, which may play roles in both the adverse effects of botulism and the mechanism underlying clinical treatment with BoNT-A.


Assuntos
Toxinas Botulínicas Tipo A/efeitos adversos , Botulismo , Técnicas Cosméticas/efeitos adversos , Lobo Frontal , Imageamento por Ressonância Magnética , Adulto , Toxinas Botulínicas Tipo A/administração & dosagem , Botulismo/induzido quimicamente , Botulismo/diagnóstico por imagem , Botulismo/fisiopatologia , Feminino , Lobo Frontal/diagnóstico por imagem , Lobo Frontal/fisiopatologia , Humanos
11.
Sci Rep ; 8(1): 7408, 2018 05 09.
Artigo em Inglês | MEDLINE | ID: mdl-29743683

RESUMO

Managing endovascular thrombectomy (ET) in diabetic ischemic stroke (IS) with novel anticoagulants is challenging due to putative risk of intracerebral hemorrhage. The study evaluates increased hemorrhagic transformation (HT) risk in Rivaroxaban-treated diabetic rats post ET. Diabetes was induced in male Sprague-Dawley rats by intraperitoneal injection of 60 mg/kg streptozotocin. After 4-weeks, rats were pretreated orally with 30 mg/kg Rivaroxaban/saline; prothrombin time was monitored. IS and ET was induced after 1 h, by thread-induced transient middle cerebral artery occlusion (tMCAO) that mimicked mechanical ET for proximal MCA occlusion at 60 min. After 24 h reperfusion, infarct volumes, HT, blood-brain barrier (BBB) permeability, tight junction at peri-ischemic lesion and matrix metalloproteinase-9 (MMP-9) activity was measured. Diabetic rats seemed to exhibit increased infarct volume and HT at 24 h after ET than normal rats. Infarct volumes and functional outcomes did not differ between Rivaroxaban and diabetic control groups. A significant increase in HT volumes and BBB permeability under Rivaroxaban treatment was not detected. Compared to diabetic control group, neither the occludin expression was remarkably lower in the Rivaroxaban group nor the MMP-9 activity was higher. Together, Rivaroxaban does not increase HT after ET in diabetic rats with proximal MCA occlusion, since Rivaroxaban has fewer effects on post-ischemic BBB permeability.


Assuntos
Isquemia Encefálica/complicações , Diabetes Mellitus Experimental/complicações , Hemorragias Intracranianas/complicações , Rivaroxabana/farmacologia , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/cirurgia , Trombectomia , Animais , Barreira Hematoencefálica/metabolismo , Hemorragias Intracranianas/metabolismo , Masculino , Metaloproteinase 9 da Matriz/metabolismo , Ocludina/metabolismo , Permeabilidade , Ratos , Ratos Sprague-Dawley , Risco
12.
Talanta ; 164: 121-127, 2017 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-28107905

RESUMO

To develop a rapid, simple and sensitive method for the determination of human immunodeficiency virus p24 (HIV-p24), a novel molecularly imprinted polymers (MIPs) electrochemical sensor was constructed on the surface of a multi-walled carbon nanotubes (MWCNTs) modified glassy carbon electrode (GCE) by surface polymerization using acrylamide (AAM) as functional monomer, N,N'-methylenebisacrylamide (MBA) as cross-linking agent and ammonium persulphate (APS) as initiator. Each modification step was carefully examined by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and scanning electron microscope (SEM). The proposed MIPs electrochemical biosensor exhibited specific recognition to HIV-p24 and displayed a broad linear detection range from 1.0×10-4 to 2ngcm-3 with a low detection limit of 0.083pgcm-3 (S/N=3). This performance is superior to most HIV-p24 sensors based on other methods. Meanwhile, this sensor possessed of good selectivity, repeatability, reproducibility, stability and was successfully applied for the determination of HIV-p24 in real human serum samples, giving satisfactory results. The accuracy and reliability of the sensor is further confirmed by enzyme-linked immunosorbent assay (ELISA).


Assuntos
Eletroquímica/instrumentação , Proteína do Núcleo p24 do HIV/análise , Limite de Detecção , Impressão Molecular , Nanotubos de Carbono/química , Polímeros/síntese química , Calibragem , Carbono/química , Eletrodos , Vidro/química , Proteína do Núcleo p24 do HIV/química , Polímeros/química
13.
Ann Med ; 48(5): 367-75, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-27153002

RESUMO

OBJECTIVE: CHA2DS2-VASc is the extension of the CHADS2 score developed by Birmingham 2009. This risk stratification schema is often used in clinical setting when considering additional risk factors for developing stroke in AF patients. However, its role in the non-AF population is unknown. This study was designed to evaluate the accuracy of the CHADS2 and the CHA2DS2-VASc scoring systems. METHODS: Studies designed for CHADS2 and CHA2DS2-VASc score in stratifying the risks for stroke development in non-AF patients were included. RESULTS: Among the 114 studies identified, six trials were chosen finally and included for meta-analysis. The pooled diagnostic odds ratio (DOR) for CHADS2 and CHA2DS2-VASc was 2.86 (95% CI =1.83-4.28) and 2.80 (95% CI =1.83-4.28), respectively. CHA2DS2-VASc score was of better sensitivity than CHADS2 score (0.920 vs. 0.768). However, both scores were showed to have inherent heterogeneity and poor specificity. CONCLUSIONS: Though having good diagnostic accuracy, the clinical application of the CHADS2 and CHA2DS2-VASc scores in predicting risk of stroke development in non-AF patients still needs further validation. Key message The overall diagnostic accuracy of CHADS2 and CHA2DS2-VASc in stroke-risk stratification was good in patients with non-atrial fibrillation.


Assuntos
Fibrilação Atrial/complicações , Medição de Risco/métodos , Acidente Vascular Cerebral/epidemiologia , Tromboembolia/epidemiologia , Idoso , Idoso de 80 Anos ou mais , Técnicas de Apoio para a Decisão , Avaliação da Deficiência , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Razão de Chances , Acidente Vascular Cerebral/diagnóstico , Tromboembolia/diagnóstico
14.
Clin Res Cardiol ; 105(8): 677-686, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26902972

RESUMO

BACKGROUND: Recent evidence suggests that pulse pressure (PP) is a strong cardiovascular diseases' risk factor. We systematically evaluated all relevant studies to determine whether PP can be used as an independent predictor of stroke and mortality. METHODS AND RESULTS: A meta-analysis was performed by searching the published literature using MEDLINE, Cochrane and Google Scholar databases up to December 15, 2015. We measured the effect size expressed by hazard ratio (HR) and 95 % confidence interval (95 % CI). Eleven publications were included in the analysis. Pooled results demonstrated that 10 mmHg increase in PP was associated with increased risk of stroke occurrence (pooled HR 1.046, 95 % CI 1.025-1.068, P < 0.001). Additionally, systolic blood pressure (SBP) (pooled HR 1.053, 95 % CI 1.033-1.073, P < 0.001) and diastolic blood pressure (DPB) (pooled HR 1.056, 95 % CI 1.038-1.074, P < 0.001) were found to be significant predictors for stroke. We did not find a significant association between PP and all-cause mortality (pooled HR 1.022, 95 % CI 0.983-1.063, P = 0.270). We found SBP (pooled HR 1.008, 95 % CI 1.002-1.014, P = 0.012), but not DBP (pooled HR 1.023, 95 % CI 0.964-1.085, P = 0.451) to be significantly associated with all-cause mortality. CONCLUSIONS: Current data confirms that PP is an independent risk factor for stroke but is not a predictor of mortality.


Assuntos
Pressão Sanguínea , Hipertensão/complicações , Acidente Vascular Cerebral/etiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Hipertensão/diagnóstico , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Medição de Risco , Fatores de Risco , Acidente Vascular Cerebral/diagnóstico , Acidente Vascular Cerebral/fisiopatologia
15.
Chronic Dis Transl Med ; 1(4): 203-209, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29063008

RESUMO

OBJECTIVE: To summarize the use rate, safety, efficacy of antithrombotics in stroke/transient ischemic attack (TIA) prevention, and reasons for not using dabigatran etexilate (DE) in Shanghai, China. METHODS: Non-valvular atrial fibrillation (NVAF)-associated stroke patients were prospectively registered as an electronic database. Use rate of antithrombotics and reasons for not using DE were extracted during follow-up. Patients' baseline characteristics, recurrent ischemic stroke/TIA events and bleeding complications were analyzed. PATIENTS: From April 2012 to August 2014, 110 inpatients with NVAF-associated stroke were studied in our hospital. NVAF was diagnosed by 12-lead electrocardiogram, 24 h Holter and echocardiography. RESULTS: Before introduction of DE (April 2013), use rates of warfarin and antiplatelets were 28.9% (11/38) and 60.5% (23/38) respectively; after that, use rates of warfarin, DE, and antiplatelets were 20.8% (15/72), 12.5% (9/72), and 43.1% (31/72). The DE did not improve use of anticoagulants (P = 0.639). There were 19 (17.3%) recurrent ischemic stroke events up to October 2015; two (9.5%) in the non-user group, 10 (18.5%) in the antiplatelet group, and seven (20.0%) in the anticoagulants group (P = 0.570). Furthermore, recurrence rates were similar between the DE group (20.0%) and the Warfarin group (20.0%, P = 1.000). The most common reason for not using DE was financial concerns (61.0%), followed by inconvenience to purchase (14.0%) and hemorrhage concerns (11.0%). Two patients using warfarin found fecal occult blood so they stopped warfarin and began to use antiplatelet drugs. No bleeding event occurred in the other groups. Only one patient had side effects (dyspepsia and gastroesophageal reflux) from DE. CONCLUSION: The use rate of either DE or warfarin in Shanghai was low; DE had not improved anticoagulation therapy for NVAF patients in Shanghai mainly because DE had not been covered by health insurance.

16.
Medicine (Baltimore) ; 94(23): e896, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26061309

RESUMO

The purpose of this study was to perform a meta-analysis of current literature to determine whether lowering blood pressure (BP) during the acute phase of an ischemic stroke improves short- and long-term outcomes. PubMed, Cochrane, and Embase were searched until September 5, 2014 using combinations of the search terms: blood pressure reduction, reduced blood pressure, lowering blood pressure, ischemic stroke, acute stroke, and intra-cerebral hemorrhage. Inclusion criteria were randomized controlled trial and patients with acute stroke (ischemic or hemorrhagic) treated with an antihypertensive agent or placebo. Outcome measures were change in systolic and diastolic BP (SBP, DBP) after treatment, and short- and long-term dependency and mortality rates. A total of 459 studies were identified, and ultimately 22 studies were included in the meta-analysis. The total number of participants in the treatment groups was 5672 (range, 6-2308), and in the control groups was 5416 (range, 6-2033). In most studies, more than 50% of the participants were males and the mean age was more than 60 years. The mean follow-up time ranged from 5 days to 12 months. As expected, treatment groups had a greater decrease in BP than control groups, and this effect was seen with different classes of antihypertensive drugs. Short-term and long-term dependency rates were similar between treatment and control groups (short-term dependency: pooled odds ratio [OR] = 1.041, 95% confidence interval [CI]: 0.936-1.159, P = 0.457; long-term dependency: pooled OR = 1.013, 95% CI: 0.915-1.120, P = 0.806). Short-term or long-term mortality was similar between the treatment and control groups (short-term mortality: pooled OR = 1.020, 95% CI: 0.749-1.388, P = .902; long-term mortality: pooled OR = 1.039, 95% CI: 0.883-1.222, P = 0.644). Antihypertensive agents effectively reduce BP during the acute phase of an ischemic stroke, but provide no benefit with respect to short- and long-term dependency and mortality.


Assuntos
Anti-Hipertensivos/uso terapêutico , Isquemia Encefálica/complicações , Isquemia Encefálica/mortalidade , Hipertensão/complicações , Hipertensão/tratamento farmacológico , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/mortalidade , Humanos , Prognóstico , Fatores de Tempo
20.
Zhongguo Zhen Jiu ; 25(3): 173-5, 2005 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-16312924

RESUMO

OBJECTIVE: To compare therapeutic effects of acupuncture at lateral cervical Jiaji and at traditional Jiaji points on cervical spondylosis of vertebroarterial type. METHODS: Seventy-two cases of vertebroarterial type cervical spondylosis were randomly divided into a needling lateral cervical Jiaji group (n=40) and a traditional Jiaji group (n=32). After 2 courses, therapeutic effects were evaluated and ultrasound Doppler's detection of skull was conducted. RESULTS: The therapeutic effect in the lateral cervical Jiaji group was better than that in the traditional Jiaji group (P < 0.05); And there was a significant or very significant difference between the two groups in the velocity of blood flow and the index of vascular pulsation (P < 0.05 or P < 0.01). CONCLUSION: The results of acupuncture at lateral cervical Jiaji points is better than that of acupuncture at traditional Jiaji points for treatment of cervical spondylosis of vertebroarterial type.


Assuntos
Pontos de Acupuntura , Espondilose , Terapia por Acupuntura , Frequência Cardíaca , Humanos , Crânio , Espondilose/terapia
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