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2.
BMC Neurol ; 24(1): 338, 2024 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-39261794

RESUMEN

BACKGROUND: Amantadine hydrochloride has been increasingly prescribed as a neurostimulant for neurocritical care stroke patients to promote wakefulness during inpatient recovery. However, a lack of guidelines makes it difficult to decide who may benefit from this pharmacotherapy and when amantadine should be initiated during the hospital stay. This study aims to determine some factors that may be associated with favorable response to amantadine to inform future randomized controlled trials of amantadine in critical care or post-critical care stroke patients. METHODS: Retrospective chart review for this study included neurocritical care and post-neurocritical care patients with acute ischemic or hemorrhagic stroke who were started on amantadine (N = 34) in the years 2016-2019. Patients were labeled as either responders or nonresponders of amantadine within 9 days of initiation using novel amantadine scoring criteria utilized and published in Neurocritical Care in the year 2021, which included spontaneous wakefulness and Glasgow Coma Scale (GCS). Amantadine response status and predictive variables were analyzed using nonparametric tests and adjusted multivariable regression models. RESULTS: There were large but nonsignificant variations in the median total milligrams of amantadine received in the first 9 days (IQR = 700-1,450 mg, p = 0.727). GCS on the day before amantadine initiation was significantly higher for responders (median = 12, IQR = 9-14) than nonresponders (median = 9, IQR = 8-10, p = 0.009). Favorable responder status was significantly associated with initiation in the critical care unit versus the step-down unit or the general medical/surgical floor [𝛃=1.02, 95% CI (0.10, 1.93), p = 0.031], but there was no significant associations with hospital day number started [𝛃=-0.003, 95% CI (-0.02, 0.02), p = 0.772]. CONCLUSIONS: Future randomized controlled trials of amantadine in hospitalized stroke patients should possibly consider examining dose-dependent relationships to establish stroke-specific dosing guidelines, minimum GCS threshold for which amantadine is efficacious, and the impact of patients' determined level of acuity on clinical outcomes instead of solely examining the impact of earlier amantadine initiation by hospital day number. Future research with larger sample sizes is needed to further examine these relationships and inform future clinical trials.


Asunto(s)
Amantadina , Cuidados Críticos , Accidente Cerebrovascular , Amantadina/uso terapéutico , Humanos , Estudios Retrospectivos , Masculino , Anciano , Femenino , Persona de Mediana Edad , Cuidados Críticos/métodos , Accidente Cerebrovascular/tratamiento farmacológico , Ensayos Clínicos Controlados Aleatorios como Asunto/métodos , Anciano de 80 o más Años , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Escala de Coma de Glasgow , Resultado del Tratamiento , Dopaminérgicos/uso terapéutico , Dopaminérgicos/administración & dosificación
3.
Narra J ; 4(2): e758, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39280302

RESUMEN

Understanding the cost-effectiveness of aspirin-clopidogrel combination therapy is crucial in determining its influence on coagulation parameters, specifically prothrombin time (PT) and activated partial thromboplastin time (APTT). The aim of this study was to assess the cost-effectiveness and clinical impact of using the aspirin-clopidogrel combination compared to aspirin alone in managing ischemic stroke. Employing an observational research design, inpatient ischemic stroke cases receiving the aspirin-clopidogrel combination were compared to those treated with aspirin alone. Focusing on the hospital's perspective on costs, the research specifically analyzed medical expenses without discounting costs or effects. The analysis involved comparing the direct medical costs and coagulation parameters between the two treatment groups. Our data revealed that the aspirin-clopidogrel combination demonstrated superior cost-effectiveness over aspirin alone, indicated by the incremental cost-effectiveness ratio (ICER) values for PT (IDR -246,930/second) and APTT (IDR -119,270/second). This indicated that the combination therapy was associated with lower costs while yielding better clinical parameter values. The ICER analysis placed the aspirin-clopidogrel combination in the southeast quadrant, marking its dominance over aspirin monotherapy by demonstrating higher effectiveness at lower costs. These results suggest that combination therapy might be a favorable alternative for managing ischemic stroke, presenting a viable option for consideration in clinical practice. The findings underscore the potential economic and clinical advantages of employing the aspirin-clopidogrel combination in routine stroke management protocols.


Asunto(s)
Aspirina , Clopidogrel , Análisis Costo-Beneficio , Quimioterapia Combinada , Accidente Cerebrovascular Isquémico , Inhibidores de Agregación Plaquetaria , Humanos , Clopidogrel/uso terapéutico , Clopidogrel/administración & dosificación , Aspirina/uso terapéutico , Aspirina/economía , Aspirina/administración & dosificación , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Accidente Cerebrovascular Isquémico/economía , Inhibidores de Agregación Plaquetaria/uso terapéutico , Inhibidores de Agregación Plaquetaria/economía , Inhibidores de Agregación Plaquetaria/administración & dosificación , Femenino , Masculino , Anciano , Persona de Mediana Edad , Resultado del Tratamiento , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/economía
4.
Int J Mol Sci ; 25(17)2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-39273389

RESUMEN

Matrix metalloproteinases (MMPs) such as MMP-9, 3, and 2 degrade the cellular matrix and are believed to play a crucial role in ischemic stroke. We examined how the duration of ischemia (up to 4 h) and treatment with recombinant tissue plasminogen activator altered the comparative expression of these MMPs in experimental ischemic stroke with reperfusion. Both prolonged ischemia and r-tPA treatment markedly increased MMP-9 expression in the ischemic hemisphere (all p < 0.0001). The duration of ischemia and r-tPA treatment also significantly increased MMP-2 expression (p < 0.01-0.001) in the ischemic hemisphere (p < 0.01) but to a lesser degree than MMP-9. In contrast, MMP-3 expression significantly decreased in the ischemic hemisphere (p < 0.001) with increasing duration of ischemia and r-tPA treatment (p < 0.05-0001). MMP-9 expression was prominent in the vascular compartment and leukocytes. MMP-2 expression was evident in the vascular compartment and MMP-3 in NeuN+ neurons. Prolonging the duration of ischemia (up to 4 h) before reperfusion increased brain hemorrhage, infarction, swelling, and neurologic disability in both saline-treated (control) and r-tPA-treated mice. MMP-9 and MMP-2 expression were significantly positively correlated with, and MMP-3 was significantly negatively correlated with, infarct volume, swelling, and brain hemorrhage. We conclude that in experimental ischemic stroke with reperfusion, the duration of ischemia and r-tPA treatment significantly altered MMP-9, 3, and 2 expression, ischemic brain injury, and neurological disability. Each MMP showed unique patterns of expression that are strongly correlated with the severity of brain infarction, swelling, and hemorrhage. In summary, in experimental ischemic stroke in male mice with reperfusion, the duration of ischemia, and r-tPA treatment significantly altered the immunofluorescent expression of MMP-9, 3, and 2, ischemic brain injury, and neurological disability. In this model, each MMP showed unique patterns of expression that were strongly correlated with the severity of brain infarction, swelling, and hemorrhage.


Asunto(s)
Isquemia Encefálica , Metaloproteinasa 2 de la Matriz , Metaloproteinasa 3 de la Matriz , Metaloproteinasa 9 de la Matriz , Activador de Tejido Plasminógeno , Animales , Metaloproteinasa 9 de la Matriz/metabolismo , Ratones , Masculino , Metaloproteinasa 2 de la Matriz/metabolismo , Metaloproteinasa 3 de la Matriz/metabolismo , Isquemia Encefálica/tratamiento farmacológico , Isquemia Encefálica/metabolismo , Isquemia Encefálica/patología , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/metabolismo , Modelos Animales de Enfermedad , Ratones Endogámicos C57BL , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Accidente Cerebrovascular Isquémico/metabolismo , Accidente Cerebrovascular Isquémico/patología , Factores de Tiempo
6.
J Cell Mol Med ; 28(17): e70091, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39267208

RESUMEN

Sodium-glucose cotransporter-2 (SGLT-2) is expressed in the kidney and may contribute to anaemia and cardiovascular diseases. The effect of SGLT-2 inhibition on anaemia and vascular endpoints in sickle cell disease (SCD) is unknown. A murine model of SCD was studied to determine the effects of the SGLT-2 inhibitor, empagliflozin, on anaemia and stroke size. The University of Michigan's Precision Health Database was used to evaluate the effect of SGLT-2 inhibitors on anaemia in humans with SCD. SCD mice treated with daily empagliflozin for 8 weeks demonstrated increases in haemoglobin, haematocrit, erythrocyte counts, reticulocyte percentage and erythropoietin compared to vehicle-treated mice. Following photochemical-induced thrombosis of the middle cerebral artery, mice treated with empagliflozin demonstrated reduced stroke size compared to vehicle treated mice. In the electronic health records analysis, haemoglobin, haematocrit and erythrocyte counts increased in human SCD subjects treated with an SGLT-2 inhibitor. SGLT-2 inhibitor treatment of humans and mice with SCD is associated with improvement in anaemic parameters. Empagliflozin treatment is also associated with reduced stroke size in SCD mice suggesting SGLT-2 inhibitor treatment may be beneficial with regard to both anaemia and vascular complications in SCD patients.


Asunto(s)
Anemia de Células Falciformes , Anemia , Compuestos de Bencidrilo , Modelos Animales de Enfermedad , Glucósidos , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Accidente Cerebrovascular , Animales , Anemia de Células Falciformes/complicaciones , Anemia de Células Falciformes/tratamiento farmacológico , Anemia de Células Falciformes/sangre , Anemia de Células Falciformes/patología , Inhibidores del Cotransportador de Sodio-Glucosa 2/farmacología , Humanos , Ratones , Compuestos de Bencidrilo/farmacología , Glucósidos/farmacología , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/patología , Masculino , Anemia/tratamiento farmacológico , Anemia/etiología , Femenino , Transportador 2 de Sodio-Glucosa/metabolismo , Ratones Endogámicos C57BL
7.
Clin Neurol Neurosurg ; 245: 108500, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39116795

RESUMEN

OBJECTIVE: This study aimed to externally validate different predictive scores for symptomatic intracranial hemorrhage (SICH) after intravenous thrombolysis (IVT), with a particular focus on their predictive abilities in Asian stroke patients. METHODS: We retrospectively enrolled stroke patients who received a standard dose of alteplase within 4.5 hours from symptom onset at the First Affiliated Hospital of Dalian Medical University from July 2010 to August 2023. SICH was defined as the hemorrhagic transformation detected on the head CT scan completed within 48 h post-IVT, accompanied by a clinical deterioration of at least a 4-point increase in NIHSS score. Predictive abilities of the HAT, MSS, SEDAN, SPAN-100, and GRASPS scores were tested. Discrimination and calibration were performed using the area under the receiver operating characteristic curve (ROC-AUC), DeLong test, and Hosmer-Lemeshow (H-L) goodness-of-fit test. RESULTS: The study included 1007 stroke patients, of whom 31 (3.08 %) developed SICH. ROC-AUCs for predicting SICH were: 0.796 (95 %CI: 0.726-0.866) for the GRASPS score, 0.724 (95 %CI: 0.644-0.804) for the MSS score, 0.715 (95 %CI: 0.619-0.811) for the SEDAN score, 0.714 (95 %CI: 0.611-0.817) for the HAT score, and 0.605 (95 %CI: 0.491-0.720) for the SPAN-100 score (all P < 0.05). DeLong tests showed that the GRASPS score demonstrated significantly better discrimination than the MSS score (P = 0.010), the SEDAN score (P = 0.009), the HAT score (P = 0.049), and the SPAN-100 score (P = 0.000). H-L tests indicated good calibrations which were ranked HAT > SEDAN > MSS > SPAN-100 > GRASPS scores. CONCLUSION: The GRASPS score showed reasonable predictive ability for SICH, indicating its potential utility for Asian stroke patients receiving IVT.


Asunto(s)
Fibrinolíticos , Hemorragias Intracraneales , Accidente Cerebrovascular , Terapia Trombolítica , Activador de Tejido Plasminógeno , Humanos , Masculino , Femenino , Hemorragias Intracraneales/diagnóstico por imagen , Persona de Mediana Edad , Anciano , Accidente Cerebrovascular/tratamiento farmacológico , Terapia Trombolítica/efectos adversos , Terapia Trombolítica/métodos , Fibrinolíticos/administración & dosificación , Fibrinolíticos/efectos adversos , Fibrinolíticos/uso terapéutico , Estudios Retrospectivos , Activador de Tejido Plasminógeno/efectos adversos , Activador de Tejido Plasminógeno/uso terapéutico , Activador de Tejido Plasminógeno/administración & dosificación , Pueblo Asiatico , Valor Predictivo de las Pruebas , Anciano de 80 o más Años , Administración Intravenosa
8.
Clin Appl Thromb Hemost ; 30: 10760296241279545, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39183537

RESUMEN

Direct oral anticoagulants (DOACs) changed stroke prevention and decreased the risk of ischemic and hemorrhagic complications in patients on oral anticoagulation (OAC) therapy. The numbers of patients prescribed DOACs has increased rapidly. Availability of specific reversal agents opened new avenues in the prevention and management of DOAC complications. An ideal specific reversal agent for a DOAC in acute stroke is an agent which lacks safety concerns and immediately reverses DOAC anticoagulation activity, thereby enabling effective treatment. Reversal of anticoagulant activity is mandatory in patients with acute ischemic stroke (AIS) before performing therapeutic procedures such as intravenous thrombolysis (IVT) and neurosurgery in intracranial hemorrhage (ICH) in order to improve clinical outcomes. In this manuscript we pursue an interdisciplinary approach in discussing advantages and concerns of specific reversal agents in acute stroke DOAC-treated patients in everyday clinical practice.


Asunto(s)
Anticoagulantes , Accidente Cerebrovascular , Humanos , Anticoagulantes/uso terapéutico , Anticoagulantes/administración & dosificación , Anticoagulantes/efectos adversos , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/prevención & control , Administración Oral , Accidente Cerebrovascular Isquémico/tratamiento farmacológico
9.
Redox Biol ; 75: 103266, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39094400

RESUMEN

Despite the protective nature of the blood-brain barrier (BBB) and brain-protecting tissues, some types of CNS injury or stress can cause cerebral cytokine production and profound alterations in brain function. Neuroinflammation, which can also be accompanied by increased cerebral cytokine production, has a remarkable impact on the pathogenesis of many neurological illnesses, including loss of BBB integrity and ischemic stroke, yet effective treatment choices for these diseases are currently lacking. Although little is known about the brain effects of Metformin (MF), a commonly prescribed first-line antidiabetic drug, prior research suggested that it may be useful in preventing BBB deterioration and the increased risk of stroke caused by tobacco smoking (TS). Therefore, reducing neuroinflammation by escalating anti-inflammatory cytokine production and declining pro-inflammatory cytokine production could prove an effective therapeutic strategy for ischemic stroke. Hence, the current investigation was planned to explore the potential role of MF against stroke and TS-induced neuroinflammation and reactive oxygen species (ROS) production. Our studies revealed that MF suppressed releasing pro-inflammatory mediators like tumor necrosis factor-α (TNF-α) and interleukin-1ß (IL-1ß) by aiming at the nuclear factor kappa B (NF-κB) signaling pathway in primary neurons and astrocytes. MF also upregulated anti-inflammatory mediators, like interleukin-10 (IL-10), and interleukin-4 (IL-4), by upregulating the Nrf2-ARE signaling pathway. Adolescent mice receiving MF along with TS exposure also showed a notable decrease in NF-κB expression compared to the mice not treated with MF and significantly decreased the level of TNF-α, IL-1ß, MCP-1, and MIP-2 and increased the levels of IL-10 and IL-4 through the activation of Nrf2-ARE signaling pathway. These results suggest that MF has anti-neuroinflammatory effects via inhibiting NF-κB signaling by activating Nrf2-ARE. These studies support that MF could be a strong candidate drug for treating and or preventing TS-induced neuroinflammation and ischemic stroke.


Asunto(s)
Astrocitos , Metformina , Factor 2 Relacionado con NF-E2 , Neuronas , Accidente Cerebrovascular , Animales , Factor 2 Relacionado con NF-E2/metabolismo , Ratones , Metformina/farmacología , Astrocitos/metabolismo , Astrocitos/efectos de los fármacos , Accidente Cerebrovascular/metabolismo , Accidente Cerebrovascular/tratamiento farmacológico , Neuronas/metabolismo , Neuronas/efectos de los fármacos , Enfermedades Neuroinflamatorias/tratamiento farmacológico , Enfermedades Neuroinflamatorias/metabolismo , Enfermedades Neuroinflamatorias/etiología , Especies Reactivas de Oxígeno/metabolismo , Transducción de Señal/efectos de los fármacos , Citocinas/metabolismo , Humanos , Modelos Animales de Enfermedad , FN-kappa B/metabolismo
10.
Exp Neurol ; 381: 114940, 2024 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-39214348

RESUMEN

Statins have evident neuroprotective role in acute ischemic stroke(AIS). The pleiotropic effect by which statin exerts neuroprotective effects, needs to be explored for considering it as one of the future adjunctive therapies in AIS. Endoplasmic reticulum(ER) assists cellular survival by reducing protein aggregates during ischemic conditions. ER-stress mediated apoptosis and autophagy are predominant reasons for neuronal death in AIS. Statin exerts both anti-apoptotic and anti-autophagic effect in neurons under ischemic stress. Although the influence of statin on autophagic neuroprotection has been reported with contradictory results. Thus, in our study we have attempted to understand its influence on autophagic protection while inhibiting upregulation of autophagic death(autosis). Previously we reported, statin can alleviate apoptosis via modulating cardiolipin mediated mitochondrial dysfunction. However, the clearance of damaged mitochondria is essential for prolonged cell survival. In our study, we tried to decipher the mechanism by which statin leads to neuronal survival by the mitophagy mediated cellular clearance. Simvastatin was administered to Sprague Dawley(SD) rats both as prophylaxis and treatment. The safety and efficacy of the statin was validated by assessment of infarct size and functional outcome. A reduction in oxidative and ER-stress were observed in both the prophylactic and treatment groups. The influence of statin on autophagy/apoptosis balance was evaluated by molecular assessment of mitophagy and cellular apoptosis. Statin reduces the post-stroke ER-stress and predominantly upregulated autophagolysosome mediated mitophagy than apoptotic cell death by modulating pAMPK/LC3B/LAMP2 axis. Based on the above findings statin could be explored as an adjunctive therapy for AIS in future.


Asunto(s)
Apoptosis , Autofagia , Estrés del Retículo Endoplásmico , Proteína 2 de la Membrana Asociada a los Lisosomas , Fármacos Neuroprotectores , Ratas Sprague-Dawley , Simvastatina , Animales , Estrés del Retículo Endoplásmico/efectos de los fármacos , Ratas , Apoptosis/efectos de los fármacos , Autofagia/efectos de los fármacos , Fármacos Neuroprotectores/farmacología , Simvastatina/farmacología , Masculino , Proteína 2 de la Membrana Asociada a los Lisosomas/metabolismo , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/metabolismo , Proteínas Asociadas a Microtúbulos/metabolismo , Proteínas Quinasas Activadas por AMP/metabolismo , Proteínas Quinasas Activadas por AMP/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Accidente Cerebrovascular Isquémico/metabolismo , Accidente Cerebrovascular Isquémico/patología
12.
Toxins (Basel) ; 16(8)2024 Aug 02.
Artículo en Inglés | MEDLINE | ID: mdl-39195750

RESUMEN

We conducted a multicenter and retrospective study to describe the use of botulinum toxin type A (BoNT-A) to treat post-stroke spasticity (PSS). Data were extracted from free-text in electronic health records (EHRs) in five Spanish hospitals. We included adults diagnosed with PSS between January 2015 and December 2019, stratified into BoNT-A-treated and untreated groups. We used EHRead® technology, which incorporates natural language processing and machine learning, as well as SNOMED CT terminology. We analyzed demographic data, stroke characteristics, BoNT-A use patterns, and other treatments. We reviewed the EHRs of 1,233,929 patients and identified 2190 people with PSS with a median age of 69 years; in total, 52.1% were men, 70.7% had cardiovascular risk factors, and 63.2% had suffered an ischemic stroke. Among the PSS patients, 25.5% received BoNT-A at least once. The median time from stroke to spasticity onset was 205 days, and the time from stroke to the first BoNT-A injection was 364 days. The primary goal of BoNT-A treatment was pain control. Among the study cohort, rehabilitation was the most common non-pharmacological treatment (95.5%). Only 3.3% had recorded monitoring scales. In conclusion, a quarter of patients with PSS received BoNT-A mainly for pain relief, typically one year after the stroke. Early treatment, disease monitoring, and better data documentation in EHRs are crucial to improve PSS patients' care.


Asunto(s)
Toxinas Botulínicas Tipo A , Aprendizaje Automático , Espasticidad Muscular , Procesamiento de Lenguaje Natural , Accidente Cerebrovascular , Humanos , Espasticidad Muscular/tratamiento farmacológico , Espasticidad Muscular/etiología , Toxinas Botulínicas Tipo A/uso terapéutico , Masculino , Femenino , Anciano , Accidente Cerebrovascular/complicaciones , Accidente Cerebrovascular/tratamiento farmacológico , Estudios Retrospectivos , Persona de Mediana Edad , Registros Electrónicos de Salud , Fármacos Neuromusculares/uso terapéutico , Anciano de 80 o más Años
13.
CNS Neurosci Ther ; 30(8): e70004, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39169599

RESUMEN

BACKGROUND AND OBJECTIVE: Metformin pretreatment might have neuroprotective effects. We aimed to determine the therapeutic effects of the antidiabetic medication metformin on ischemic stroke severity and discharge outcomes. METHODS: We analyzed data on 1303 ischemic stroke patients who were on antidiabetic medications from the Massachusetts General Hospital (MGH) Advanced Comprehensive Stroke Center dataset (n = 8943, 2012-2022). We applied propensity score matching (PSM) and inverse probability of treatment weighting (IPTW) analyses to investigate the effect of current usage of metformin (versus alternate antidiabetic treatment) on acute stroke clinical severity and discharge outcomes. RESULTS: Of the 1303 patients who were on antidiabetic medications at the time of stroke admission, 730 (56%) were taking metformin. Metformin users were younger and more frequently had hypertension, whereas less frequently had prior CAD, AFib, and chronic kidney disease. The clinical features and laboratory values of the two groups were evenly distributed after PSM. Metformin-treated patients had statistically significant lower stroke severity on admission [National Institutes of Health Stroke Scale (NIHSS) (median, interquartile range) 3.0 (1.0-8.0) vs. 4.0 (2.0-11.3), p = 0.011], better functional independence at discharge (modified Rankin scale score 0-2, 36.3% vs. 25.4%, p < 0.001) and less in-hospital mortality (4.5% vs. 11.3%, p = 0.018). IPTW analysis results were consistent with PSM results. CONCLUSIONS: Among diabetic patients with acute ischemic stroke, metformin appears to confer neuroprotection. Our results extend previous findings to the general stroke population. Stroke patients with diabetes mellitus who were treated with metformin prior to stroke, even when combined with additional antidiabetic medications, experienced less severe strokes upon admission and had better functional outcomes during hospitalization.


Asunto(s)
Hipoglucemiantes , Metformina , Puntaje de Propensión , Índice de Severidad de la Enfermedad , Humanos , Metformina/uso terapéutico , Masculino , Femenino , Anciano , Hipoglucemiantes/uso terapéutico , Persona de Mediana Edad , Anciano de 80 o más Años , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Resultado del Tratamiento , Accidente Cerebrovascular/tratamiento farmacológico , Estudios Retrospectivos
14.
Nat Commun ; 15(1): 6610, 2024 Aug 04.
Artículo en Inglés | MEDLINE | ID: mdl-39098904

RESUMEN

There is no effective and noninvasive solution for thrombolysis because the mechanism by which certain thrombi become tissue plasminogen activator (tPA)-resistant remains obscure. Endovascular thrombectomy is the last option for these tPA-resistant thrombi, thus a new noninvasive strategy is urgently needed. Through an examination of thrombi retrieved from stroke patients, we found that neutrophil extracellular traps (NETs), ε-(γ-glutamyl) lysine isopeptide bonds and fibrin scaffolds jointly comprise the key chain in tPA resistance. A theranostic platform is designed to combine sonodynamic and mechanical thrombolysis under the guidance of ultrasonic imaging. Breakdown of the key chain leads to a recanalization rate of more than 90% in male rat tPA-resistant occlusion model. Vascular reconstruction is observed one month after recanalization, during which there was no thrombosis recurrence. The system also demonstrates noninvasive theranostic capabilities in managing pigs' long thrombi (>8 mm) and in revascularizing thrombosis-susceptible tissue-engineered vascular grafts, indicating its potential for clinical application. Overall, this noninvasive theranostic platform provides a new strategy for treating tPA-resistant thrombi.


Asunto(s)
Terapia Trombolítica , Trombosis , Activador de Tejido Plasminógeno , Animales , Activador de Tejido Plasminógeno/uso terapéutico , Humanos , Trombosis/diagnóstico por imagen , Trombosis/tratamiento farmacológico , Masculino , Ratas , Terapia Trombolítica/métodos , Trampas Extracelulares/metabolismo , Porcinos , Fibrinolíticos/uso terapéutico , Fibrinolíticos/farmacología , Ratas Sprague-Dawley , Modelos Animales de Enfermedad , Fibrina/metabolismo , Nanomedicina Teranóstica/métodos , Resistencia a Medicamentos , Accidente Cerebrovascular/diagnóstico por imagen , Accidente Cerebrovascular/terapia , Accidente Cerebrovascular/tratamiento farmacológico
15.
Front Immunol ; 15: 1433590, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39139557

RESUMEN

Salvianolic acid A (SalA), a bioactive compound extracted from Salvia miltiorrhiza, has garnered considerable interest for its potential in ameliorating the post-stroke neuroinflammation. This review delineates the possible molecular underpinnings of anti-inflammatory and neuroprotective roles of SalA, offering a comprehensive analysis of its therapeutic efficacy in preclinical studies of ischemic stroke. We explore the intricate interplay between post-stroke neuroinflammation and the modulatory effects of SalA on pro-inflammatory cytokines, inflammatory signaling pathways, the peripheral immune cell infiltration through blood-brain barrier disruption, and endothelial cell function. The pharmacokinetic profiles of SalA in the context of stroke, characterized by enhanced cerebral penetration post-ischemia, makes it particularly suitable as a therapeutic agent. Preliminary clinical findings have demonstrated that salvianolic acids (SA) has a positive impact on cerebral perfusion and neurological deficits in stroke patients, warranting further investigation. This review emphasizes SalA as a potential anti-inflammatory agent for the advancement of innovative therapeutic approaches in the treatment of ischemic stroke.


Asunto(s)
Antiinflamatorios , Ácidos Cafeicos , Enfermedades Neuroinflamatorias , Accidente Cerebrovascular , Humanos , Animales , Ácidos Cafeicos/uso terapéutico , Ácidos Cafeicos/farmacología , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular/metabolismo , Enfermedades Neuroinflamatorias/tratamiento farmacológico , Enfermedades Neuroinflamatorias/etiología , Antiinflamatorios/uso terapéutico , Antiinflamatorios/farmacología , Fármacos Neuroprotectores/uso terapéutico , Fármacos Neuroprotectores/farmacología , Lactatos/uso terapéutico , Lactatos/farmacología , Barrera Hematoencefálica/metabolismo , Barrera Hematoencefálica/efectos de los fármacos
16.
Zool Res ; 45(5): 1001-1012, 2024 Sep 18.
Artículo en Inglés | MEDLINE | ID: mdl-39147715

RESUMEN

Thrombosis and inflammation are primary contributors to the onset and progression of ischemic stroke. The contact-kinin pathway, initiated by plasma kallikrein (PK) and activated factor XII (FXIIa), functions bidirectionally with the coagulation and inflammation cascades, providing a novel target for therapeutic drug development in ischemic stroke. In this study, we identified a bat-derived oligopeptide from Myotis myotis (Borkhausen, 1797), designated LE6 (Leu-Ser-Glu-Glu-Pro-Glu, 702 Da), with considerable potential in stroke therapy due to its effects on the contact kinin pathway. Notably, LE6 demonstrated significant inhibitory effects on PK and FXIIa, with inhibition constants of 43.97 µmol/L and 6.37 µmol/L, respectively. In vitro analyses revealed that LE6 prolonged plasma recalcification time and activated partial thromboplastin time. In murine models, LE6 effectively inhibited carrageenan-induced mouse tail thrombosis, FeCl 3-induced carotid artery thrombosis, and photochemically induced intracerebral thrombosis. Furthermore, LE6 significantly decreased inflammation and stroke injury in transient middle cerebral artery occlusion models. Notably, the low toxicity, hemolytic activity, and bleeding risk of LE6, along with its synthetic simplicity, underscore its clinical applicability. In conclusion, as an inhibitor of FXIIa and PK, LE6 offers potential therapeutic benefits in stroke treatment by mitigating inflammation and preventing thrombus formation.


Asunto(s)
Oligopéptidos , Accidente Cerebrovascular , Animales , Ratones , Oligopéptidos/farmacología , Accidente Cerebrovascular/tratamiento farmacológico , Quirópteros , Trombosis , Inflamación , Masculino , Antiinflamatorios/farmacología
17.
Int. j. morphol ; 42(4): 984-990, ago. 2024. ilus, tab
Artículo en Inglés | LILACS | ID: biblio-1569276

RESUMEN

SUMMARY: In this study we aimed to examine the effect of novel vasodilatory drug Riociguat co-administration along resveratrol to recover neurodegeneration in experimental stroke injury. For that purpose, thirty-five adult female rats were divided into five groups (Control, MCAO, MCAO + R, MCAO + BAY, MCAO + C) of seven animals in each. Animals in Control group did not expose to any application during the experiment and sacrificed at the end of the study. Rats in the rest groups exposed to middle cerebral artery occlusion (MCAO) induced ischemic stroke. MCAO + R group received 30 mg/kg resveratrol, and MCAO + BAY group received 10 mg/kg Riociguat. The MCAO + C group received both drugs simultaneously. The drugs were administered just before the reperfusion, and the additional doses were administered 24h, and 48h hours of reperfusion. All animals in this study were sacrificed at the 72nd hour of experiment. Total brains were received for analysis. Results of this experiment indicated that MCAO led to severe injury in cerebral structure. Bax, IL-6 and IL-1ß tissue levels were up-regulated, but anti-apoptotic Bcl-2 immunoexpression was suppressed (p<0.05). In resveratrol and Riociguat treated animals, the neurodegenerations and apoptosis and inflammation associated protein expressions were improved compared to MCAO group, but the most success was obtained in combined treatment exposed animals in MCAO + C group. This study indicated that the novel soluble guanylate stimulator Riociguat is not only a potent neuroprotective drug in MCAO induced stroke, but also synergistic administration of Riociguat along with resveratrol have potential to increase the neuroprotective effect of resveratrol in experimental cerebral stroke exposed rats.


En este estudio, nuestro objetivo fue examinar el efecto de la coadministración del nuevo fármaco vasodilatador Riociguat junto con resveratrol para recuperar la neurodegeneración en lesiones por ataques cerebrovasculares experimentales. Para ello, se dividieron 35 ratas hembras adultas en cinco grupos (Control, MCAO, MCAO + R, MCAO + BAY, MCAO + C) de siete animales en cada uno. Los animales del grupo control no fueron sometidos a ninguna aplicación durante el experimento y se sacrificaron al final del estudio. Las ratas de los grupos expuestas a la oclusión de la arteria cerebral media (MCAO) indujeron un ataque cerebrovascular isquémico. El grupo MCAO + R recibió 30 mg/kg de resveratrol y el grupo MCAO + BAY recibió 10 mg/kg de Riociguat. El grupo MCAO + C recibió ambos fármacos simultáneamente. Los fármacos se administraron antes de la reperfusión y las dosis adicionales se administraron a las 24 y 48 horas de la reperfusión. Todos los animales en este estudio fueron sacrificados a las 72 horas del experimento. Se recibieron cerebros totales para su análisis. Los resultados indicaron que la MCAO provocaba lesiones graves en la estructura cerebral. Los niveles tisulares de Bax, IL-6 e IL- 1ß estaban regulados positivamente, pero se suprimió la inmunoexpresión antiapoptótica de Bcl-2 (p <0,05). En los animales tratados con resveratrol y Riociguat, las neurodegeneraciones y las expresiones de proteínas asociadas a la apoptosis y la inflamación mejoraron en comparación con el grupo MCAO, sin embargo el mayor éxito se obtuvo en el tratamiento combinado de animales expuestos en el grupo MCAO + C. Este estudio indicó que el nuevo estimulador de guanilato ciclasa soluble Riociguat no solo es un fármaco neuroprotector potente en el ataque cerebrovascular inducido por MCAO, sino que también la administración sinérgica de Riociguat junto con resveratrol tiene el potencial para aumentar el efecto neuroprotector del resveratrol en ratas experimentales expuestas a un ataque cerebrovascular.


Asunto(s)
Animales , Femenino , Ratas , Pirazoles/administración & dosificación , Pirimidinas/administración & dosificación , Accidente Cerebrovascular/tratamiento farmacológico , Resveratrol/administración & dosificación , Arteriopatías Oclusivas , Ensayo de Inmunoadsorción Enzimática , Inmunohistoquímica , Interleucina-6/análisis , Apoptosis/efectos de los fármacos , Fármacos Neuroprotectores , Arteria Cerebral Media , Accidente Cerebrovascular/patología , Activadores de Enzimas/administración & dosificación , Modelos Animales , Quimioterapia Combinada , Interleucina-1beta/análisis , Guanilato Ciclasa/efectos de los fármacos , Inflamación
18.
Clin Neurol Neurosurg ; 244: 108463, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39053321

RESUMEN

OBJECTIVE: This study assesses the safety and efficacy of tirofiban for patients with large vessel occlusion stroke after intravenous thrombolysis. METHODS: This study data was from SUSTAIN, DEVT, and RESCUE BT trials. According to whether the use of tirofiban who underwent endovascular treatment and preceding intravenous thrombolysis was divided into the tirofiban group and the no-tirofiban group. The safety outcomes were symptomatic intracranial hemorrhage, any intracranial hemorrhage within 48 h, and 3-month mortality. The efficacy outcome was defined as a score of 0-2 on the modified Rankin Scale scores at 3 months. RESULTS: A total of 372 patients with intravenous thrombolysis were included in these SUSTAIN, DEVT, and RESCUE BT trials. Adjusted multivariate analysis showed that tirofiban with intravenous thrombolysis was not associated with symptomatic intracranial hemorrhage (aOR, 0.87; 95 % CI, 0.49-1.57; P=0.65), any intracranial hemorrhage within 48 h (aOR, 1.00; 95 % CI, 0.60-1.66; P=1.00), 3-month mortality (aOR, 1.10; 95 % CI, 0.56-2.19; P=0.78) and 3-month modified Rankin Scale scores 0-2 (aOR, 0.72; 95 % CI, 0.42-1.25; P=0.25) in patients with acute large vessel occlusion. In the subgroup analysis, we found that tirofiban was not recommended for females (aOR, 0.34; 95 % CI, 0.12-0.93), baseline Alberta Stroke Program Early CT Score≤9 (aOR, 0.37; 95 % CI, 0.18-0.76), and cardiogenic embolism (aOR, 0.36; 95 % CI, 0.14-0.97). CONCLUSION: Tirofiban combined with intravenous thrombolysis in patients with acute large vessel occlusion may be safe. Further studies need to confirm the effectiveness of tirofiban after intravenous thrombolysis in different stroke etiology.


Asunto(s)
Procedimientos Endovasculares , Fibrinolíticos , Terapia Trombolítica , Tirofibán , Humanos , Tirofibán/uso terapéutico , Tirofibán/administración & dosificación , Femenino , Masculino , Persona de Mediana Edad , Anciano , Procedimientos Endovasculares/métodos , Terapia Trombolítica/métodos , Resultado del Tratamiento , Fibrinolíticos/uso terapéutico , Fibrinolíticos/administración & dosificación , Accidente Cerebrovascular/tratamiento farmacológico , Accidente Cerebrovascular Isquémico/tratamiento farmacológico , Anciano de 80 o más Años , Administración Intravenosa , Hemorragias Intracraneales/etiología , Hemorragias Intracraneales/inducido químicamente , Inhibidores de Agregación Plaquetaria/uso terapéutico , Inhibidores de Agregación Plaquetaria/administración & dosificación
19.
Phytother Res ; 38(8): 4321-4335, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38990183

RESUMEN

The transplantation of bone marrow mesenchymal stem cells (MSCs) in stroke is hindered by the restricted rates of survival and differentiation. Ginsenoside compound K (CK), is reported to have a neuroprotective effect and regulate energy metabolism. We applied CK to investigate if CK could promote the survival of MSCs and differentiation into brain microvascular endothelial-like cells (BMECs), thereby alleviating stroke symptoms. Therefore, transwell and middle cerebral artery occlusion (MCAO) models were used to mimic oxygen and glucose deprivation (OGD) in vitro and in vivo, respectively. Our results demonstrated that CK had a good affinity for GLUT1, which increased the expression of GLUT1 and the production of ATP, facilitated the proliferation and migration of MSCs, and activated the HIF-1α/VEGF signaling pathway to promote MSC differentiation. Moreover, CK cooperated with MSCs to protect BMECs, promote angiogenesis and vascular density, enhance neuronal and astrocytic proliferation, thereby reducing infarct volume and consequently improving neurobehavioral outcomes. These results suggest that the synergistic effects of CK and MSCs could potentially be a promising strategy for stroke.


Asunto(s)
Ginsenósidos , Transportador de Glucosa de Tipo 1 , Subunidad alfa del Factor 1 Inducible por Hipoxia , Células Madre Mesenquimatosas , Accidente Cerebrovascular , Factor A de Crecimiento Endotelial Vascular , Ginsenósidos/farmacología , Animales , Células Madre Mesenquimatosas/efectos de los fármacos , Células Madre Mesenquimatosas/metabolismo , Transportador de Glucosa de Tipo 1/metabolismo , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo , Accidente Cerebrovascular/tratamiento farmacológico , Masculino , Diferenciación Celular/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Ratas , Ratas Sprague-Dawley , Proliferación Celular/efectos de los fármacos , Neovascularización Fisiológica/efectos de los fármacos , Angiogénesis
20.
J Neurol Sci ; 463: 123123, 2024 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-38981417

RESUMEN

In the last decade, mobile stroke units (MSUs) have shown the potential to transform prehospital stroke care, marking a paradigm shift in delivering ultra-rapid thrombolysis and streamlining triage processes. These units bring acute stroke care directly to patients, significantly shortening treatment times. This review outlines the rationale for MSU care and discusses the potential applications beyond the original purpose of delivering thrombolysis, including large vessel occlusion detection, intracerebral hemorrhage management, and innovative forms of prehospital research.


Asunto(s)
Unidades Móviles de Salud , Accidente Cerebrovascular , Terapia Trombolítica , Humanos , Accidente Cerebrovascular/terapia , Accidente Cerebrovascular/tratamiento farmacológico , Terapia Trombolítica/métodos , Unidades Móviles de Salud/organización & administración , Servicios Médicos de Urgencia/métodos
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