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1.
Lipids Health Dis ; 23(1): 211, 2024 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-38965603

RESUMO

BACKGROUND: Previous research on ABO blood types and stroke has been controversial, predominantly suggesting heightened risk of stroke in non-O blood types. Nonetheless, investigations into the correlation and underlying mechanisms between ABO blood groups and stroke subtypes, especially within Chinese cohorts, remain limited. METHODS: The ABO blood types of 9,542 ischaemic stroke (IS) patients were inferred using two ABO gene loci (c.261G > del; c.802G > A). The healthy population was derived from the 1000 Genomes Project. Patients were classified by the causative classification system (CCS). Volcano plot and gene ontology (GO) analysis were employed to explore protein differential expression among blood types. Additionally, HT29 and SW480 cell lines with downregulated ABO expression were generated to evaluate its impact on cholesterol uptake and efflux. RESULTS: A greater proportion of stroke patients had non-O blood types (70.46%) than did healthy individuals (61.54%). Notable differences in blood type distributions were observed among stroke subtypes, with non-O blood type patients mainly classified as having large artery atherosclerosis (LAA). Clinical baseline characteristics, such as the low-density lipoprotein cholesterol level, activated partial thromboplastin time and thrombin time, varied significantly among blood types. A volcano plot revealed 17 upregulated and 42 downregulated proteins in the O blood type. GO term analysis indicated that downregulated proteins were primarily associated with lipid metabolism pathways. In vitro experiments revealed that reducing ABO gene expression decreased cholesterol uptake and increased cholesterol efflux. CONCLUSIONS: This study revealed that the non-O blood type increased the risk of LAA stroke through cholesterol metabolism.


Assuntos
Sistema ABO de Grupos Sanguíneos , Aterosclerose , Colesterol , Acidente Vascular Cerebral , Humanos , Sistema ABO de Grupos Sanguíneos/genética , Masculino , Colesterol/sangue , Feminino , Pessoa de Meia-Idade , Aterosclerose/sangue , Aterosclerose/genética , Idoso , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/genética , Fatores de Risco , LDL-Colesterol/sangue , Células HT29
2.
J Stroke Cerebrovasc Dis ; 33(8): 107761, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38723923

RESUMO

OBJECTIVES: First, this registry-based study aimed to comprehensively analyze patients' medical histories and treatments based on ischemic strokes' etiology. We focused on the management of atrial fibrillation among patients diagnosed with cardioembolic stroke. Then, our objective was to identify prognostic factors associated with 28-day mortality. MATERIALS AND METHODS: All ischemic strokes occurring in adults between 2014 and 2021 in Lille, France, were categorized using the TOAST classification. Comparative analyses of patients' medical characteristics were conducted across subtypes. Survival rates within 28 days post-stroke were assessed, and factors influencing mortality were identified using a multivariate Cox model. RESULTS: 1912 ischemic strokes were recorded, due to cardioembolism (36%), large-artery atherosclerosis (9%), small-artery occlusion (9%), other determined causes (6%), or undetermined causes (39%). The median NIHSS score after cardioembolic stroke (6, IQR: 3-13) was twice that after small-artery occlusion (3, IQR: 2-5). Among patients with cardioembolic stroke, 26% were diagnosed post-admission with atrial fibrillation. For the 42% diagnosed pre-admission, only 54% had prior prescriptions for oral anticoagulants. Reperfusion therapies were administered in 21% of cases, with significant variations across subtypes. Mortality rates were higher after cardioembolic strokes (17%) than after small-artery occlusions (3%). Prognostic factors included etiology, high NIHSS score, atrial fibrillation, and previous heparin prescription. CONCLUSIONS: While atrial fibrillation was underdiagnosed and undertreated, patients with cardioembolic stroke exhibited high severity and elevated mortality rates. Etiology emerged as an independent predictor of early mortality, regardless of NIHSS score upon admission. These findings underscore the importance of targeted prevention to improve patient outcomes after ischemic stroke.


Assuntos
Anticoagulantes , Fibrilação Atrial , AVC Isquêmico , Sistema de Registros , Humanos , Idoso , AVC Isquêmico/diagnóstico , AVC Isquêmico/mortalidade , AVC Isquêmico/terapia , AVC Isquêmico/etiologia , Masculino , Feminino , França/epidemiologia , Fatores de Risco , Pessoa de Meia-Idade , Idoso de 80 Anos ou mais , Fatores de Tempo , Medição de Risco , Fibrilação Atrial/diagnóstico , Fibrilação Atrial/terapia , Fibrilação Atrial/mortalidade , Fibrilação Atrial/tratamento farmacológico , Resultado do Tratamento , Anticoagulantes/uso terapêutico , AVC Embólico/etiologia , AVC Embólico/diagnóstico , AVC Embólico/terapia , AVC Embólico/mortalidade , Avaliação da Deficiência , Prognóstico
3.
J Stroke Cerebrovasc Dis ; 30(8): 105935, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34153594

RESUMO

OBJECTIVES: Recurrent stroke remains a challenge though secondary prevention is initiated immediately post-stroke. Stroke subtype may determine the risk of recurrent stroke and require specific preventive measures. We aimed to identify subtype-specific stroke recurrence and associated risk factors over time. METHODS AND MATERIALS: A systematic review was performed using PubMed and Embase for studies including adults >18 years, first-ever ischemic stroke in population-based observational studies or registries, documented TOAST-criteria and minimum 1-year follow-up. Meta-analysis on stroke recurrence rate was performed. Final search: November 2019. RESULTS: The search retrieved 26 studies (between 1997 and 2019). Stroke recurrence rate ranged from 5.7% to 51.3%. Recurrent stroke was most frequent in large artery atherosclerosis (LAA) and cardioembolic (CE) stroke with recurrent stroke similar to index stroke subtype. We identified a lower recurrence rate for small vessel occlusion (SVO) stroke with recurrence frequently of another stroke subtype. Based on a meta-analysis the summary proportion recurrence rate of recurrent stroke in studies using TOAST-criteria = 0.12 and = 0.14 in studies using TOAST-like criteria. Hypertension, diabetes mellitus, atrial fibrillation previous transient ischemic attack, and high stroke severity were independent risk factors for recurrence. CONCLUSION: Stroke recurrence rates seem unchanged over time despite the use of secondary prevention. The highest recurrence rate is in LAA and CE stroke eliciting same subtype recurrent stroke. A lower recurrence rate is seen with SVO stroke with a more diverse recurrence pattern. Extensive workup is important in all stroke subtypes - including SVO stroke. Future research needs to identify better preventive treatment and improve compliance to risk factor prevention to reduce stroke recurrence.


Assuntos
Doenças de Pequenos Vasos Cerebrais/epidemiologia , AVC Embólico/epidemiologia , Arteriosclerose Intracraniana/epidemiologia , AVC Isquêmico/epidemiologia , Idoso , Idoso de 80 Anos ou mais , Doenças de Pequenos Vasos Cerebrais/diagnóstico , Doenças de Pequenos Vasos Cerebrais/prevenção & controle , Comorbidade , AVC Embólico/diagnóstico , AVC Embólico/prevenção & controle , Feminino , Humanos , Arteriosclerose Intracraniana/diagnóstico , Arteriosclerose Intracraniana/prevenção & controle , AVC Isquêmico/diagnóstico , AVC Isquêmico/prevenção & controle , Masculino , Pessoa de Meia-Idade , Prevalência , Prognóstico , Recidiva , Medição de Risco , Fatores de Risco , Prevenção Secundária , Fatores de Tempo
4.
J Stroke Cerebrovasc Dis ; 30(12): 106033, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34598837

RESUMO

OBJECTIVES: In recent years, the evidence of the relationship between epigenetics and acute ischemic stroke (AIS) were accumulating, however, the epigenetic characteristics that directs specifically towards the aetiology of large-artery atherosclerosis (LAA) remain ambiguous. The aim of this study was to highlight the overall evidence concerning the epigenetic mechanisms associated with the occurrence of LAA. MATERIALS AND METHODS: Studies that involve investigations related to epigenetic markers (DNA methylation and RNA modifications) and LAA were retrieved from eleven scientific publication databases. The studies were screened through the pre-set inclusion and exclusion criteria prior to the NOS evaluation. RESULTS: Eligible studies (n=25) were evaluated. Of which, six reported on DNA methylation and 19 studies assessed RNA modifications (16 on miRNAs, two on lncRNAs, and one study on circRNA). Hypomethylation of MTRNR2L8 and ERα promoters; microRNAs (miR-7-2-3p, miR-16, miR-34a-5p, miR-126, miR-143, miR-200b, miR-223, miR-503, miR-1908, miR-146a rs2910164 C/G, miR-149 rs2292832 T/C, miR-200b rs7549819 T/C, miR-34a rs2666433); lncRNA of ZFAS1; and circRNA of hsa_circRNA_102488 were associated with LAA significantly. CONCLUSION: Current systematic review highlighted hypomethylation of miRNAs and lncRNA might be the potential biomarkers for LAA.


Assuntos
Aterosclerose , Aterosclerose/genética , Epigênese Genética , Humanos
5.
BMC Neurol ; 20(1): 380, 2020 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-33087079

RESUMO

BACKGROUND: Numerous studies on acute ischemic stroke (AIS) have been conducted at low-altitude regions, and the related findings have been used to guide clinical management. However, corresponding studies at high altitude are few. This study aimed to analyse the clinical characteristics of AIS patients at high-altitude regions through a hospital-based comparative study between Tibet and Beijing. METHODS: This study included the diagnoses of AIS patients from People's Hospital of Tibet Autonomous Region (PHOTAR) and Peking University First Hospital (PUFH) between 1 January 2014 and 31 December 2017, where data including patient demographics, treatment time, onset season, risk factors, infarction location, laboratory data, image examination results, treatments, and AIS subtype were collected and compared. Continuous and categorical variables were analysed with a two-sample t-test or Wilcoxon rank sum test and chi-square test, respectively. Significant risk factors were examined with binary logistic regression analysis. RESULTS: In total, 236 and 1021 inpatients from PHOTAR and PUFH were included, respectively. The PHOTAR patients were younger than the PUFH patients (P < 0.001). Young adult stroke, erythrocytosis, and hyperhomocysteinemia were more frequent in PHOTAR patients (all P < 0.001). Other vascular risk factors, including hypertension, diabetes mellitus, hyperlipidaemia, smoking and alcohol consumption history, were less prevalent in PHOTAR patients than in PUFH patients. The rate of intravenous thrombolysis and the rate of within intravenous thrombolysis window time were also lower in PHOTAR patients (both P < 0.001). The PHOTAR group also tended to have anterior circulation infarction. Erythrocytosis and hyperhomocysteinemia were independent risk factors in PHOTAR, and young adults accounted for a larger proportion of stroke cases. CONCLUSION: In Tibet, AIS patients were relatively younger, and anterior circulation infarctions were more common. Erythrocytosis and hyperhomocysteinemia may contribute to these differences. Here, young adult stroke also accounted for a higher proportion, and this may be associated with erythrocytosis. Our findings present the first hospital-based comparative study in Tibet and may contribute to policies for stroke prevention in this region.


Assuntos
AVC Isquêmico/epidemiologia , Adulto , Idoso , Feminino , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Tibet/epidemiologia
6.
Neurol Sci ; 41(11): 3301-3306, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32415639

RESUMO

BACKGROUND: Each stroke subtype is associated with specific risk factors, and stroke prevention depends solely on the control of the underlying risk factors for each stroke subtype. Obstructive sleep apnea has been established as a major risk factor for stroke and cardiovascular disease. However, information on the stroke subtype linked to obstructive sleep apnea is scarce. METHODS: This was a single-center, observational case series study conducted on patients who were admitted with acute ischemic stroke to King Khalid University Hospital. The TOAST criteria were used to determine the stroke subtype in each of these patients. The Berlin questionnaire was utilized to assess the presence of obstructive sleep apnea. The proportion of each stroke subtype was then calculated and compared between the group with associated obstructive sleep apnea and the group without associated obstructive sleep apnea. RESULTS: A total of 170 consecutive patients with acute ischemic stroke were admitted between January 2018 and September 2018. Eighty-seven (51%) patients were found to have obstructive sleep apnea. The proportion of small artery disease was significantly greater in the obstructive sleep apnea group (44% vs. 26%, P = 0.02). There was no difference in the distribution of the other stroke subtypes between the two groups. Univariate analysis revealed that small artery disease was associated with body mass index, hypertension, and obstructive sleep apnea. However, in a multivariate logistic analysis, only hypertension was found to be independently associated with small artery disease. CONCLUSION: Small artery disease is the most common stroke subtype associated with obstructive sleep apnea. Clinicians must vigilantly assess the presence of obstructive sleep apnea in ischemic stroke patients, especially in patients whose stroke is attributed to small artery disease.


Assuntos
Isquemia Encefálica , Apneia Obstrutiva do Sono , Acidente Vascular Cerebral , Índice de Massa Corporal , Isquemia Encefálica/complicações , Isquemia Encefálica/epidemiologia , Humanos , Fatores de Risco , Apneia Obstrutiva do Sono/complicações , Apneia Obstrutiva do Sono/epidemiologia , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/epidemiologia
7.
BMC Health Serv Res ; 20(1): 905, 2020 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-32993613

RESUMO

BACKGROUND: In this study, we aimed to analyze the hospitalization costs for immobile patients with hemorrhagic stroke (IHS) or ischemic stroke (IIS) in China and to determine the factors associated with hospitalization costs. METHODS: We evaluated patients with IHS and IIS hospitalized between November 2015 and July 2016 in six provinces or municipality cities of China. Linear regression analysis was used to examine the association with hospitalization costs and predictors. RESULTS: In total, 1573 patients with IHS and 3143 with IIS were enrolled and analyzed. For IHS and IIS, the average length of stay (LoS) was 17.40 ± 12.3 and 14.47 ± 11.55 days. The duration of immobility was 12.11 ± 9.98 and 7.36 ± 9.77 days, respectively. Median hospitalization costs were RMB 47000.68 (interquartile range 19,827.37, 91,877.09) for IHS and RMB 16578.44 (IQR 7020.13, 36,357.65) for IIS. In both IHS and IIS groups, medicine fees accounted for more than one-third of hospitalization costs. Materials fees and medical service fees accounted for the second and third largest proportions of hospital charges in both groups. Linear regression analysis showed that LoS, hospital level, and previous surgery were key determinants of hospitalization costs in all immobile patients with stroke. Subgroup analysis indicated that hospital level was highly correlated with hospitalization costs for IHS whereas pneumonia and deep vein thrombosis were key factors associated with hospitalization costs for IIS. CONCLUSIONS: We found that hospitalization costs were notably higher in IHS than IIS, and medicine fees accounted for the largest proportion of hospitalization costs in both patient groups, perhaps because most patients ended up with complications such as pneumonia thereby requiring more medications. LoS and hospital level may greatly affect hospitalization costs. Increasing the reimbursement ratio of medical insurance for patients with IHS is recommended. Decreasing medicine fees and LoS, preventing complications, and improving treatment capability may help to reduce the economic burden of stroke in China.


Assuntos
Acidente Vascular Cerebral Hemorrágico/terapia , Hospitalização/economia , Imobilização/estatística & dados numéricos , AVC Isquêmico/terapia , Adolescente , Adulto , Idoso , China , Custos e Análise de Custo/estatística & dados numéricos , Estudos Transversais , Feminino , Humanos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
8.
J Stroke Cerebrovasc Dis ; 29(1): 104489, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31706752

RESUMO

BACKGROUND: Impairment of endothelial function is associated with atherosclerosis and atrial fibrillation, and could underlie several types of ischemic stroke. Embolic stroke of undetermined source (ESUS) recently attracted much attention as the major cause of cryptogenic stroke. This study aimed to clarify the endothelial function of patients with ESUS. METHODS AND RESULTS: Between 2015 September and July 2017 July, we used flow-mediated vasodilation (FMD) test to evaluate vascular endothelial function in 182 patients with any vascular risk factors or a history of cerebrovascular events. The subject group was classified into the No Stroke group and 5 stroke subtype groups, large artery atherosclerosis (LAA), cardiogenic embolism (CE), small vessel disease (SVD), ESUS, and others (Other). Endothelial function was expressed as percentage increase in brachial vessel diameter (%FMD) after the interruption of blood flow with mechanical compression for 5 minutes. Mean FMD in the No stroke, LAA, CE, SVD, ESUS and Other groups were 7.03 ± 2.14%, 5.02 ± 2.75%, 4.97 ± 1.62%, 5.19 ± 2.67%, 3.55 ± 1.42%, and 6.55 ± 3.50%, respectively. After the adjustment for confounding factors, FMD was significantly lower in the ESUS group than in the No stroke, SVD, and Other groups. FMD tended to be lower in the ESUS group than in the LAA and CE groups, but the difference was not significant. CONCLUSIONS: Endothelial function was impaired in patients with ESUS and may underlie its pathophysiology.


Assuntos
Artéria Braquial/fisiopatologia , Isquemia Encefálica/fisiopatologia , Endotélio Vascular/fisiopatologia , Embolia Intracraniana/fisiopatologia , Acidente Vascular Cerebral/fisiopatologia , Vasodilatação , Idoso , Idoso de 80 Anos ou mais , Artéria Braquial/diagnóstico por imagem , Isquemia Encefálica/diagnóstico por imagem , Isquemia Encefálica/etiologia , Estudos Transversais , Endotélio Vascular/diagnóstico por imagem , Feminino , Humanos , Embolia Intracraniana/diagnóstico por imagem , Embolia Intracraniana/etiologia , Masculino , Pessoa de Meia-Idade , Sistema de Registros , Fatores de Risco , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/etiologia
9.
Eur J Neurol ; 25(2): 293-300, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29053905

RESUMO

BACKGROUND AND PURPOSE: Clinical trials have shown that robust collateral flow has a relationship with good clinical outcome; however, different stroke subtypes were lumped together. This study explored the relationship between baseline collaterals and the onset-to-imaging time (OIT) and the correlation between pre-treatment collateral status and clinical outcome amongst different subtypes. METHOD: Prospectively collected data from consecutive acute ischaemic stroke patients with acute middle cerebral artery occlusion who received reperfusion therapy were reviewed. The regional leptomeningeal score (20 points) was based on the scoring extent of contrast opacification in the six Alberta Stroke Program Early CT Score (ASPECTS) cortical regions (M1-6), parasagittal anterior cerebral artery territory and the basal ganglia by perfusion-derived dynamic four-dimensional computed tomography angiography (4D CTA). Stroke subtype was determined by the TOAST classification criteria. A 3-months modified Rankin Scale score of 0-2 was defined as a good outcome. RESULTS: The analysis included 158 patients: 30 (19.0%) patients had large artery atherosclerotic stroke (LAA), 87 (55.1%) cardioembolic stroke (CE) and 41 (25.9%) stroke of undetermined etiology. Baseline collateral was negatively correlated with OIT (P = 0.0205) in the CE group after adjusting for female sex, smoking, hyperlipidemia, baseline National Institutes of Health Stroke Scale (NIHSS) and baseline mismatch ratio, but not in the LAA group. Baseline collateral showed a strong relationship with good clinical outcome after adjusting for recanalization, baseline NIHSS, age and female sex (odds ratio 1.120, confidence interval 1.013-1.238, P = 0.027) in all patients and in the CE group (odds ratio 3.223, confidence interval 1.212-8.570, P = 0.019), but not in the LAA patients. CONCLUSIONS: Based on 4D CTA, sustained good leptomeningeal collaterals may predict good outcome in CE but not in LAA patients. Moreover, the extent of collaterals was associated with OIT in the CE patients, which indicates prompt reperfusion therapy in this group of patients.


Assuntos
Arteriopatias Oclusivas/diagnóstico por imagem , Isquemia Encefálica/diagnóstico por imagem , Circulação Colateral , Meninges/diagnóstico por imagem , Avaliação de Resultados em Cuidados de Saúde , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/terapia , Idoso , Idoso de 80 Anos ou mais , Arteriopatias Oclusivas/complicações , Arteriopatias Oclusivas/terapia , Isquemia Encefálica/etiologia , Isquemia Encefálica/terapia , Angiografia Cerebral , Angiografia por Tomografia Computadorizada , Feminino , Humanos , Masculino , Meninges/irrigação sanguínea , Pessoa de Meia-Idade , Acidente Vascular Cerebral/classificação , Acidente Vascular Cerebral/etiologia , Fatores de Tempo
10.
J Stroke Cerebrovasc Dis ; 26(2): 368-375, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27793533

RESUMO

BACKGROUND: Genetic variations in the genes of matrix metalloproteinases (MMPs) may play an important role in the pathogenesis of ischemic stroke (IS). Here we investigate the association between MMP-1 -1607 1G/2G and MMP-3 -1171 5A/6A genetic polymorphisms and etiological subtypes of IS in the Han Chinese population. METHODS: A total of 640 eligible patients with IS and 637 age- and gender-matched apparently healthy volunteers were enrolled. Subtypes of IS were classified by Trial of Org 10172 in Acute Stroke Treatment criteria. MMP-1 (-1607 1G/2G) and MMP-3 (-1171 5A/6A) polymorphisms were evaluated using polymerase chain reaction-restriction fragment length polymorphism. RESULTS: The frequencies of the 5A/6A + 5A/5A genotypes and 5A allele were significantly higher in patients with IS than in controls (P <.001, P <.001, respectively). No association was found between MMP-1 1G/2G polymorphism and overall IS. In subgroup analyses, MMP-1 1G/2G and 2G/2G genotypes increased the risk of small-artery occlusion (SAO) subtype (multivariate-adjusted, P <.001, P = .002, respectively), and MMP-3 5A/6A + 5A/5A genotypes were related with large-artery atherosclerosis (LAA) subtype (multivariate-adjusted, P <.001). Haplotype analyses indicated that 2G-6A and 1G-5A increased the risk of SAO (multivariate-adjusted, P = .029) and LAA (multivariate-adjusted, P <.001), respectively. CONCLUSIONS: MMP-1 (-1607 1G/2G) and MMP-3 (-1171 5A/6A) polymorphisms may contribute to different subtypes of IS susceptibility.


Assuntos
Isquemia Encefálica/genética , Predisposição Genética para Doença , Metaloproteinase 1 da Matriz/genética , Metaloproteinase 3 da Matriz/genética , Polimorfismo Genético , Acidente Vascular Cerebral/genética , Idoso , Povo Asiático/genética , Isquemia Encefálica/etiologia , China , Feminino , Frequência do Gene , Estudos de Associação Genética , Técnicas de Genotipagem , Haplótipos , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Regiões Promotoras Genéticas , Acidente Vascular Cerebral/etiologia
11.
J Stroke Cerebrovasc Dis ; 26(5): 1154-1160, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-28262563

RESUMO

BACKGROUND: Although ischemic stroke risk is increased among people living with HIV infection, little is known about the epidemiology of ischemic stroke subtypes in contemporary HIV-infected cohorts. We examined the distribution of ischemic stroke subtypes among predominantly treated HIV-infected individuals to determine if and how the distribution differs from that of the general population. METHODS: We studied 60 HIV-infected and 60 HIV-uninfected adults with a history of first-ever ischemic stroke between 2000 and 2012. Ischemic strokes were classified as 1 of 5 subtypes based on established criteria. We used multinomial logistic regression models to compare the relative frequency of ischemic stroke subtypes by HIV status. RESULTS: Large artery atherosclerosis (23%) and stroke of undetermined etiology (23%) were the most common stroke subtypes among HIV-infected individuals. The most recent plasma HIV viral load before the stroke event differed by subtype, with a median undetectable viral load for individuals with large artery stroke and stroke of undetermined etiology. Using cardioembolic stroke as the reference subtype, HIV-infected individuals were at higher proportional risk of stroke of undetermined etiology compared with uninfected individuals (relative risk ratio [RRR]: 8.6, 95% confidence interval [CI]: 1.2-63.7, P = .04). Among HIV-infected individuals with virologically suppressed infection, we observed a trend toward a greater proportion of strokes attributable to large artery atherosclerosis (RRR: 6.7, 95% CI: .8-57.9, P = .08). CONCLUSIONS: HIV-infected individuals may be at greater proportional risk of stroke of undetermined etiology compared with uninfected individuals. Further investigation is warranted to confirm this finding and determine underlying reasons for this greater risk.


Assuntos
Isquemia Encefálica/epidemiologia , Infecções por HIV/epidemiologia , Acidente Vascular Cerebral/epidemiologia , Adulto , Idoso , Isquemia Encefálica/diagnóstico , Estudos de Casos e Controles , Distribuição de Qui-Quadrado , Feminino , Infecções por HIV/diagnóstico , Infecções por HIV/tratamento farmacológico , Infecções por HIV/virologia , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Razão de Chances , Prognóstico , Medição de Risco , Fatores de Risco , São Francisco/epidemiologia , Acidente Vascular Cerebral/diagnóstico , Fatores de Tempo , Carga Viral
12.
J Neurochem ; 136(2): 416-24, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26526443

RESUMO

A rapid differentiation of acute ischemic stroke and intracerebral hemorrhage (ICH) is essential for an adequate treatment and to promote a better outcome. Our aim was to identify new plasma biomarkers to differentiate stroke subtypes and to combine their diagnostic ability with other biomarkers already described for this clinical indication. Plasma samples of ischemic stroke patients (36) and ICH patients (10) were screened using a 177 antibodies library, and 11 showed different concentrations among stroke subtypes (p < 0.05), mainly chemokines, growth factors and angiogenic factors. Five proteins were selected for replication in 16 ischemic stroke patients and 16 ICH patients, and retinol-binding protein 4 (RPB4), apolipoprotein B100 and pigment epithelial-derived factor were replicated (p < 0.05). These proteins, together with glial fibrillary acidic protein (GFAP) and receptor for advanced glycation end product, were tested in 38 ischemic stroke and 28 ICH samples. Finally, RBP4 >61 µg/mL and GFAP <0.07 ng/mL showed a specificity of 100% for both subtypes. Moreover, after multivariate logistic regression analysis, RBP4 >48.75 µg/mL (ORadj : 6.09 (1.3-28.57), p = 0.02) and GFAP <0.07 ng/mL (ORadj : 0.03 (0.003-0.31), p = 0.003) resulted in independent predictors of stroke subtype, improving discrimination by 29% (p < 0.0001). Both biomarkers might be useful as diagnostic biomarkers to differentiate ischemic stroke and ICH. A rapid differentiation of ischemic stroke from intracerebral hemorrhage is essential to provide the appropriate treatment. We describe the discovery and subsequent replications of RBP4 and its combination with circulating GFAP as plasmatic biomarkers for hyperacute stroke subtype differentiation. The combination of these biomarkers and others might aid to speed up the discrimination of both stroke subtypes improving the outcome of patients.


Assuntos
Hemorragia Cerebral/sangue , Proteína Glial Fibrilar Ácida/sangue , Proteínas Plasmáticas de Ligação ao Retinol/metabolismo , Acidente Vascular Cerebral/sangue , Idoso , Idoso de 80 Anos ou mais , Isquemia Encefálica/complicações , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Proteoma/metabolismo , Estudos Retrospectivos , Estatísticas não Paramétricas , Acidente Vascular Cerebral/etiologia
13.
Eur J Neurol ; 23(3): 597-604, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26589370

RESUMO

BACKGROUND AND PURPOSE: Haemorrhagic transformation (HT) is common after acute ischaemic stroke. Whether liver function plays a role in HT remains an open question. METHODS: Acute ischaemic stroke patients within 7 days from stroke onset were included. Baseline data including liver function tests were collected. An independent association between liver function and HT was identified by multivariate regression analysis for stroke overall and stroke subtypes. RESULTS: A total of 2788 patients were included. HT occurred in 277 patients (9.9%), with 32 patients (1.1%) with symptomatic HT and 245 patients (8.8%) with asymptomatic HT. On multivariate regression analysis, aspartate aminotransferase (AST) and bilirubin (BILI) were independently associated with HT for stroke overall. In different stroke subtypes, AST was independently associated with HT for cardioembolic stroke, BILI for stroke of undetermined aetiology, and no liver function indicators for stroke of large-artery atherosclerosis and small-artery occlusion. CONCLUSIONS: Liver function played an uneven role in HT for different stroke subtypes. Indicators of liver function independently associated with HT were AST for cardioembolic stroke, BILI for stroke of undetermined aetiology and none for stroke of large-artery atherosclerosis and small-artery occlusion.


Assuntos
Isquemia Encefálica/complicações , Hepatopatias/etiologia , Acidente Vascular Cerebral/complicações , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Hemorragia Cerebral/complicações , Feminino , Humanos , Hepatopatias/diagnóstico , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Adulto Jovem
14.
BMC Neurol ; 16: 104, 2016 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-27422152

RESUMO

BACKGROUND: The prognostic influence of hyperglycemia in acute stroke has been well established. While in cortical stroke there is a strong association between hyperglycemia and poor outcome, this relation is less clear in lacunar stroke. It has been suggested that this discrepancy is present among patients treated with intravenous tissue plasminogen activator (tPA), but confirmation is needed. METHODS: In two prospectively collected cohorts of patient treated with intravenous tPA for acute ischemic stroke, we investigated the effect of hyperglycemia (serum glucose level >8 mmol/L) on functional outcome in lacunar and non-lacunar stroke. Poor functional outcome was defined as modified Rankin Scale score ≥ 3 at 3 months. RESULTS: A total of 1012 patients was included of which 162 patients (16%) had lacunar stroke. The prevalence of hyperglycemia did not differ between stroke subtypes (22% vs 21%, p = 0.85). In multivariate analysis hyperglycemia was associated with poor functional outcome in non-lacunar stroke (OR 2.1, 95% CI 1.39-3.28, p = 0.001). In patients with lacunar stroke, we did not find an association (OR 1.8, 95% CI 0.62-4.08, p = 0.43). CONCLUSION: This study confirms a difference in prognostic influence of hyperglycemia between non-lacunar and lacunar ischemic stroke.


Assuntos
Hiperglicemia/complicações , Acidente Vascular Cerebral Lacunar/tratamento farmacológico , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica/métodos , Administração Intravenosa , Idoso , Idoso de 80 Anos ou mais , Feminino , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral Lacunar/complicações , Ativador de Plasminogênio Tecidual/uso terapêutico , Resultado do Tratamento
15.
J Stroke Cerebrovasc Dis ; 25(9): 2232-6, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27318653

RESUMO

BACKGROUND: Intravenous thrombolysis can improve neurological outcomes after acute ischemic stroke (AIS), but hemorrhagic transformation (HT) of the infarct remains a risk. Current definitions for symptomatic intracerebral hemorrhage (ICH) all entail that there be some degree of associated neurological deterioration. However, early deleterious effects of secondary ICH might also be manifested as reduced neurological improvement. This study aims to investigate whether there are any independent associations between different radiological subtypes of HT and the degree of neurological improvement 24 hours after thrombolysis. METHODS: This study is a retrospective analysis of a single-center database of consecutive thrombolysis cases for AIS. Multivariate regression analysis was undertaken to explore the relationship between different subtypes of HT with changes in National Institutes of Health Stroke Scale (NIHSS) score 24 hours after thrombolysis, after adjusting for potential confounders. RESULTS: As compared to cases with no HT, occurrence of the parenchymal hematoma 2 (PH2) subtype of secondary ICH was independently associated with reduced improvement or worsening in the NIHSS score, with an average effect size of 7 points (95% confidence interval -10 to -4, P < .001). In the absence of PH2, thrombolysis for AIS was generally associated with an improvement in the neurological status at 24 hours. CONCLUSIONS: The PH2 subtype of HT is associated with reduced neurological improvement or deterioration 24 hours after thrombolysis for AIS.


Assuntos
Hemorragia Cerebral/induzido quimicamente , Fibrinolíticos/efeitos adversos , Doenças do Sistema Nervoso/etiologia , Doenças do Sistema Nervoso/prevenção & controle , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/tratamento farmacológico , Ativador de Plasminogênio Tecidual/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Glicemia/efeitos dos fármacos , Isquemia Encefálica/complicações , Bases de Dados Factuais/estatística & dados numéricos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Estudos Retrospectivos , Acidente Vascular Cerebral/etiologia
16.
J Stroke Cerebrovasc Dis ; 25(3): 656-64, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26750575

RESUMO

BACKGROUND: Patients with acute ischemic stroke (AIS) are at high risk of subsequent vascular events. The aim of this study was to estimate rates of recurrent stroke, myocardial infarction (MI), and major vascular events during the first year after AIS in Korea. METHODS: Through a multicenter stroke registry in Korea, 12,227 consecutive cases of AIS were identified between November 2010 and May 2013 and were followed up for recurrent stroke, MI, and major vascular events up to 1 year after stroke. RESULTS: Cumulative 30-day, 90-day and 1-year rates were 2.7%, 3.9%, and 5.7% for recurrent stroke; .1%, .3%, and .5% for MI; and 8.1%, 10.6%, and 13.7% for major vascular events, indicating that the early period is at high risk of recurrent stroke and major vascular events. The risk of recurrent stroke was substantially higher than the risk of MI: 13.0 times at 90 days and 11.4 times at 1 year. Compared to those with small-vessel occlusion (SVO), those with ischemic stroke subtypes other than SVO had a higher risk of recurrent stroke as well as major vascular events. Other common independent predictors for recurrent stroke and major vascular events were diabetes and prior stroke history. CONCLUSIONS: During the first year after AIS, one in 18 had recurrent stroke and one in 7 major vascular events. More than two thirds of recurrent stroke and three quarters of major vascular events developed within 90 days in a Korean cohort of stroke patients. Better prevention strategies are required for high-risk patients during this high-risk period.


Assuntos
Ataque Isquêmico Transitório/complicações , Infarto do Miocárdio/etiologia , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/etiologia , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Ataque Isquêmico Transitório/epidemiologia , Masculino , Pessoa de Meia-Idade , Avaliação de Resultados em Cuidados de Saúde , Inibidores da Agregação Plaquetária/uso terapêutico , Valor Preditivo dos Testes , Estudos Prospectivos , Recidiva , República da Coreia/epidemiologia , Estudos Retrospectivos , Índice de Gravidade de Doença , Fumar/epidemiologia , Acidente Vascular Cerebral/tratamento farmacológico , Fatores de Tempo
17.
J Stroke Cerebrovasc Dis ; 24(2): 388-93, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25497720

RESUMO

BACKGROUND: Little is known about the prevalence of sleep-disordered breathing (SDB) across ischemic stroke subtypes. Given the important implications for SDB screening, we tested the association between SDB and ischemic stroke subtype in a population-based study. METHODS: Within the Brain Attack Surveillance in Corpus Christi Project, ischemic stroke patients were offered SDB screening with the ApneaLink Plus (n = 355). A neurologist assigned Trial of the ORG 10172 in Acute Stroke Treatment subtype (with an additional category for nonlacunar infarctions of unknown etiology) using hospital records. Unadjusted and adjusted (demographics, body mass index, National Institutes of Health Stroke Scale, diabetes, history of stroke/transient ischemic attack) logistic and linear regression models were used to test the association between subtype and SDB or apnea-hypopnea index (AHI). RESULTS: Median age was 65%, and 55% were men; 59% were Mexican American. Median time from stroke onset to SDB screen was 13 days (interquartile range [IQR] 6, 21). Overall, 215 (61%) had SDB (AHI ≥ 10). Median AHI was 13 (IQR 6, 27). Prevalence of SDB by subtype was cardioembolism, 66%; large-artery atherosclerosis, 57%; small-vessel occlusion, 68%; other determined, 50%; undetermined etiology, 58%; and nonlacunar stroke of unknown etiology, 63%. Ischemic stroke subtype was not associated with SDB in unadjusted (P = .72) or adjusted models (P = .91) models. Ischemic stroke subtype was not associated with AHI in unadjusted (P = .41) or adjusted models (P = .62). CONCLUSIONS: In this population-based stroke surveillance study, ischemic stroke subtype was not associated with the presence or severity of SDB. Sleep-disordered breathing is likely to be present after ischemic stroke, and the subtype should not influence decisions about SDB screening.


Assuntos
Isquemia Encefálica/complicações , Síndromes da Apneia do Sono/complicações , Acidente Vascular Cerebral/complicações , Idoso , Índice de Massa Corporal , Isquemia Encefálica/classificação , Isquemia Encefálica/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Polissonografia , Fatores de Risco , Síndromes da Apneia do Sono/fisiopatologia , Acidente Vascular Cerebral/classificação , Acidente Vascular Cerebral/fisiopatologia
18.
J Stroke Cerebrovasc Dis ; 23(6): 1391-5, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24389376

RESUMO

BACKGROUND: We estimated the stiffness parameter ß (ß value), which is useful in the assessment of premature atherosclerosis, among patients with different subtypes of cerebral infarction (CI; eg, small-vessel occlusion, large-artery atherosclerosis, cardioembolism, and other determined and undetermined etiologies) to determine the clinical utility of the ß value in classification of stroke patients into CI subtypes. METHODS: Carotid ultrasonography (ALOKA ProSound SSD-alpha10) was performed in 31 CI patients and 38 control subjects, and the ß value of the bilateral common carotid artery at 2.0 cm proximal to the bifurcation was measured using the echo-tracking method. The relationship between ß value and age was examined, and the ß value was compared among the different CI subtypes. RESULTS: Positive ß value correlated with age in control subjects (R=.69, P<.001) but not in CI patients (R=-.01, P=.996). There was no significant difference in the ß value when comparing control patients and patients with cardioembolic stroke (P=.106), but the ß value were lower in patients with cardioembolic stroke than in patients with noncardioembolic stroke (eg, small-vessel occlusion, large-artery atherosclerosis, and others, P=.009). CONCLUSIONS: The ß value was lower in patients with cardioembolic stroke than in patients with noncardioembolic stroke. The ß value may be useful for estimating the risk of different stroke subtypes.


Assuntos
Isquemia Encefálica/diagnóstico por imagem , Artérias Carótidas/diagnóstico por imagem , Doenças das Artérias Carótidas/diagnóstico por imagem , Acidente Vascular Cerebral/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Ultrassonografia
19.
J Neurol Sci ; 456: 122813, 2024 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-38043333

RESUMO

BACKGROUND AND AIMS: Circadian variability of blood pressure (BP) and hypercoagulation in the morning have been proposed as underlying mechanisms of wake-up stroke (WUS). The aim was to determine the impact of cerebral microbleeds (CMBs), showing BP fluctuation and background hypercoagulability, on WUS. METHODS: Consecutive patients with acute ischemic stroke onset-to-door time within one week were screened. WUS was defined as an ischemic stroke that occurred during sleep at night. CMBs were categorized into three: "strictly Lobar", "strictly Deep (D) and/or Infratentorial (I)", and "Mixed". Moderate to severe CMBs were defined as having more than three in total. First, whether CMBs are associated with WUS was examined. Second, the same analysis was performed according to the stroke subtype classified as large-artery atherosclerosis (LAA), cardioembolism (CE), and small-vessel occlusion (SVO). RESULTS: A total of 1477 patients (1059 [72%] male, median age 69 years) were included, and WUS was observed in 363 (25%) patients. On Poisson regression analysis with a robust variance estimator in the total cohort, moderate to severe strictly D and/or I CMBs (PR 1.505, 95% CI 1.154-1.962, p = 0.003) were associated with WUS. From the perspective of stroke subtype, the same result was confirmed in LAA (PR 2.223, 95% CI 1.036-4.768, p = 0.040) and CE (PR 1.668, 95% CI 1.027-2.709, p = 0.039), not SVO. CONCLUSIONS: The presence of moderate to severe strictly D and/or I CMBs might be associated with the development of WUS. By stroke subtype, the same result was confirmed in LAA and CE.


Assuntos
Aterosclerose , AVC Isquêmico , Acidente Vascular Cerebral , Humanos , Masculino , Idoso , Feminino , Hemorragia Cerebral/complicações , Hemorragia Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/complicações , Acidente Vascular Cerebral/diagnóstico por imagem , Aterosclerose/complicações , Aterosclerose/diagnóstico por imagem , Imageamento por Ressonância Magnética , Artérias , Fatores de Risco
20.
Eur Stroke J ; : 23969873241256251, 2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38845169

RESUMO

BACKGROUND: Thrombus enhancement sign (TES) is associated with cardioembolic stroke and first-pass angiographic failure in anterior ischemic stroke. However, the relationship between TES and stroke subtype and recanalization status after endovascular treatment (EVT) in basilar artery occlusion (BAO) remains unknown. METHODS: This retrospective study included consecutive patients with acute BAO who underwent EVT between January 2020 and September 2023. Each patient underwent baseline non-contrast computed tomography (CT) and CT angiography. Two independent readers assessed the presence of TES. Stroke types were classified according to the Trial of ORG 10172 for Acute Stroke Treatment. Successful recanalization was defined as a modified Thrombolysis in Cerebral Infarction score of 2b-3 after EVT. Clinical and interventional parameters, along with histopathological thrombi examination results, were compared between the TES-positive and TES-negative groups. The associations between TES and stroke subtype and recanalization status were analyzed using univariate and multivariate analyses. RESULTS: A total of 151 patients were included in the analysis, among whom 116 (77%) exhibited TES. TES showed a significant correlation with cardioembolic and cryptogenic strokes (odds ratio [OR]: 8.56; 95% confidence interval: 3.49-22.4; p < 0.001), whereas the TES-positive thrombi were characterized by a higher fibrin/platelet proportion (p = 0.002) and lower erythrocyte proportion (p = 0.044). The TES-positive group demonstrated favorable outcomes compared to the TES-negative group, including a shorter procedure time (p < 0.001), lower number of thrombectomy attempts (p = 0.010), higher incidence of first pass success (p = 0.022), and lower rate of requiring rescue angioplasty and/or stenting (p < 0.001). In multivariate analysis, TES remained independently associated with successful recanalization (OR: 9.63; 95% CI: 2.33, 47.7; p = 0.003) after adjusting for baseline confounders. CONCLUSIONS: Visualization of TES serves as a reliable and easily accessible marker for identifying cardioembolic and cryptogenic strokes and predicting recanalization success in thrombectomy for basilar artery occlusion.

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