Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 71
Filtrar
Más filtros

Tipo del documento
Intervalo de año de publicación
1.
Chemistry ; 30(39): e202400541, 2024 Jul 11.
Artículo en Inglés | MEDLINE | ID: mdl-38739757

RESUMEN

The in situ generation of active photoredox organic catalysts upon anion-binding co-catalysis by making use of the ionic nature of common photosensitizers is reported. Hence, the merge of anion-binding and photocatalysis permitted the modulation of the photocatalytic activity of simple acridinium halide salts, building an effective anion-binding - photoredox ion pair complex able to promote a variety of visible light driven transformations, such as anti-Markovnikov addition to olefins, Diels-Alder and the desilylative C-C bond forming reactions. Anion-binding studies, together with steady-state and time-resolved spectroscopy analysis, supported the postulated ion pair formation between the thiourea hydrogen-bond donor organocatalyst and the acridinium salt, which proved essential for unlocking the photocatalytic activity of the photosensitizer.

2.
Kidney Blood Press Res ; 49(1): 165-172, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38359802

RESUMEN

INTRODUCTION: Arterial hypertension represents one of the main comorbidities observed in patients with heart failure (HF) and one of the main risk factors for its development. Despite this, studies assessing this hypertensive etiology are scarce in Latin America. Our objective was to analyze the prevalence of HF of hypertensive etiology and evaluate its prognosis in patients enrolled in the Colombian Heart Failure Registry (RECOLFACA by its Spanish acronym). METHODS: RECOLFACA recruited adult patients diagnosed with HF in 60 centers in Colombia between 2017 and 2019. The primary outcome was all-cause mortality. A Cox proportional hazards regression model was used to assess factors associated with primary outcomes in patients with hypertensive HF. A p value <0.05 was considered significant. All statistical tests were two-tailed. RESULTS: Out of the total number of patients evaluated in RECOLFACA (n = 2,514), 804 had a diagnosis of HF with hypertensive etiology (31.9%). These patients were less frequently males and had a significantly older age and lower prevalence of comorbidities than those with HF of other etiologies. Additionally, patients with hypertensive HF had a higher prevalence of HF with preserved ejection fraction (HFpEF) (34.1% vs. 28.3%; p = 0.004). Finally, type 2 diabetes mellitus, chronic obstructive pulmonary disease diagnosis, and NYHA class IV were classified as independent mortality risk factors. CONCLUSIONS: Hypertensive HF represents about one-third of the total number of patients with HF in RECOLFACA. Compared with HF of other etiologies, it presents a differential clinical profile - older age and a higher prevalence of HFpEF. RECOLFACA has become a useful tool to characterize patients with HF in Colombia, with which it has been possible to carry out a more specific search and reach the diagnosis of this pathology in our population, and it has served as an example to stimulate registries of patients with HF in other countries in the region.


Asunto(s)
Insuficiencia Cardíaca , Hipertensión , Sistema de Registros , Humanos , Insuficiencia Cardíaca/etiología , Insuficiencia Cardíaca/epidemiología , Masculino , Femenino , Hipertensión/epidemiología , Colombia/epidemiología , Anciano , Persona de Mediana Edad , Prevalencia , Pronóstico , Factores de Riesgo , Anciano de 80 o más Años , Comorbilidad
3.
Chemistry ; 29(6): e202203353, 2023 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-36314234

RESUMEN

A novel visible light promoted formation of CAryl- S bonds through electron donor-acceptor (EDA) complexes of alkylamines with 5- and 6-membered (hetero)arene halides is presented. This represents the first EDA-based thiolation method not relying on π-π or a thiolate-anion-π interactions and provides a facile access to heteroarene radicals, which can be suitably trapped by disulfide derivatives to form the corresponding versatile arylsulfides. Mechanistic investigations on the aspects of the whole process were conducted by spectroscopic measurements, demonstrating the hypothesized EDA complex formation. Moreover, the strength of this method has been proven by a gram-scale synthesis of thiolated products and the late-stage derivatization of an anticoagulant drug.

4.
Phys Chem Chem Phys ; 25(17): 12041-12049, 2023 May 03.
Artículo en Inglés | MEDLINE | ID: mdl-37082985

RESUMEN

The design and development of new triplet-triplet annihilation upconversion (TTA-UC) systems combining triplet sensitizers with acceptor compounds have attracted considerable interest. In this vein, sensitizers made from purely organic dyes rather than transition-metal complexes appear to be more convenient from an environmental point of view. BODIPYs are a very well-known class of dyes with applications in a widespread range of scientific areas. Owing to the versatility of BODIPYs, we present herein a new asymmetric BODIPY with excellent photophysical properties to be used as an appropriate sensitizer in a bimolecular TTA-UC system. Detailed spectroscopic measurements demonstrated the ability of this new design to sensitize TTA-UC by combination with a suitable acceptor such as 2,5,8,11-tetra-tert-butylperylene (TBPe), allowing a successful conversion of green to blue light. The singlet-excited TBPe so obtained is capable of activating aryl chlorides reductively which initiated the functionalization of N-methylpyrrole (Meerwein-type arylation) and formation of both substituted triarylethylenes (Mizoroki-Heck reaction) and heteroarene phosphonates (photo-Arbuzov reaction). Product yields reveal that our TTA-UC system behaved as a highly efficient photocatalytic entity.

5.
J Sci Food Agric ; 2023 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-37961830

RESUMEN

BACKGROUND: Cassava roots are widely consumed in tropical regions of Asia, Africa, and Latin America. Although the protein, vitamin, carotenoid, and mineral content in the leaves makes them a nutritionally attractive option, their consumption is limited due to their high levels of cyanogenic compounds (CCs). In this study, the CC content in different parts of the plant (leaves, storage root cortex, and parenchyma) was assessed at harvest for 50 landrace genotypes representative of cassava diversity in Latin America. The changes in CC in leaves at different physiological ages (3, 6, 9, and 11 months after planting) were also investigated. RESULTS: The average CC was higher in the cortex (804 ppm) and leaves (655 ppm) than in root parenchyma (305 ppm). Genotypes from different regions of Latin America, as identified by seven genetic diversity groups, differed significantly in CC levels. The Andean and Amazon groups had, respectively, the lowest (P = 0.0008) and highest (P < 0.0001) CC levels in all three parts of the plants. Cyanogenic compound concentrations were higher in leaves from young plants (P < 0.0001) and decreased with increasing physiological age. CONCLUSION: The results help to guide the selection of parental lines with low CC levels for breeding and to contribute to the expanded use of cassava and its by-products for food and feed. Cassava for fresh consumption, especially, requires varieties with low total CC content, especially in the root cortex and parenchyma. COL1108 (204, 213, and 174 ppm, respectively, in the parenchyma, cortex, and leaves) and PER297 (83, 238, and 299 ppm, respectively, in the parenchyma, cortex, and leaves) can fulfill this requirement. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

6.
J Sci Food Agric ; 2023 Apr 22.
Artículo en Inglés | MEDLINE | ID: mdl-37086039

RESUMEN

BACKGROUND: The purpose of this study was to investigate the potential of hyperspectral imaging for the characterization of cooking quality parameters, dry matter content (DMC), water absorption (WAB), and texture in cassava genotypes contrasting for their cooking quality. RESULTS: Hyperspectral images were acquired on cooked and fresh intact longitudinal and transversal slices from 31 cassava genotypes harvested in March 2022 in Colombia. Different chemometric methods were tested for the quantification of DMC, WAB, and texture parameters. Data analysis was conducted through partial least squares regression, K nearest neighbors regression, support vector machine regression and CovSel multiple linear regression (CovSel_MLR). Efficient performances were obtained for DMC using CovSel_MLR with, coefficient of multiple determination R p 2 = 0.94 $$ {R}_p^2=0.94 $$ , root-mean-square error of prediction RMSEP = 0.96 g/100 g, and ratio of the standard deviation values RPD = 3.60. High heterogeneity was observed between contrasting genotypes. The predicted distribution of DMC within the root can be homogeneous or heterogeneous depending on the genotype. Weak predictions were obtained for WAB and texture parameters. CONCLUSIONS: This study showed that hyperspectral imaging could be used as a high-throughput phenotyping tool for the visualization of DMC in contrasting cooking quality genotypes. Further improvement of protocols and larger datasets are required for WAB and texture quality traits. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

7.
Stroke ; 52(11): e706-e709, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34428931
8.
Dig Dis Sci ; 66(11): 3792-3802, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-33184794

RESUMEN

INTRODUCTION: Disruption of intestinal barrier is a key component to various diseases. Whether barrier dysfunction is the cause or effect in these situations is still unknown, although it is believed that translocation of luminal content may initiate gastrointestinal or systemic inflammatory disorders. Since trauma- or infection-driven epithelial permeability depends on Toll-like receptor (TLR) activity, inhibition of TLR signaling has been proposed as a strategy to protect intestinal barrier integrity after infection or other pathological conditions. Recently, selective serotonin recapture inhibitors including sertraline and citalopram were shown to inhibit TLR-3 activity, but the direct effects of these antidepressant drugs on the gut mucosa barrier remain largely unexplored. MATERIALS AND METHODS: To investigate this, two approaches were used: first, ex vivo studies were performed to evaluate sertraline and citalopram-driven changes in permeability in isolated intestinal tissue. Second, both compounds were tested for their preventive effects in a rat model of disrupted gut barrier, induced by a low protein (LP) diet. RESULTS: Only sertraline was able to increase transepithelial electrical resistance in the rat colon both when used in an ex vivo (0.8 µg/mL, 180 min) or in vivo (30 mg/kg p.o., 20 days) fashion. However, citalopram (20 mg/kg p.o., 20 days), but not sertraline, prevented the increase in phospho-IRF3 protein, a marker of TLR-3 activation, in LP-rat ileum. Neither antidepressant affected locomotion, anxiety-like behaviours or stress-induced defecation. CONCLUSION: Our data provides evidence to support the investigation of sertraline as therapeutic strategy to protect intestinal barrier function under life-threatening situations or chronic conditions associated with gut epithelial disruption.


Asunto(s)
Citalopram/farmacología , Mucosa Intestinal/metabolismo , Intestinos/efectos de los fármacos , Inhibidores Selectivos de la Recaptación de Serotonina/farmacología , Sertralina/farmacología , Alimentación Animal , Animales , Dieta , Proteínas en la Dieta/administración & dosificación , Regulación de la Expresión Génica/efectos de los fármacos , Humanos , Masculino , Permeabilidad/efectos de los fármacos , Ratas , Ratas Sprague-Dawley , Estrés Fisiológico , Proteína de la Zonula Occludens-1/genética , Proteína de la Zonula Occludens-1/metabolismo
9.
Stroke ; 48(3): 574-580, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-28196938

RESUMEN

BACKGROUND AND PURPOSE: Infections have been found to increase the risk of stroke over the short term. We hypothesized that stroke risk would be highest shortly after a sepsis hospitalization, but that the risk would decrease, yet remain up to 1 year after sepsis. METHODS: This case-crossover analysis utilized data obtained from the California State Inpatient Database of the Healthcare Cost and Utilization Project. All stroke admissions were included. Exposure was defined as hospitalization for sepsis or septicemia 180, 90, 30, or 15 days before stroke (risk period) or similar time intervals exactly 1 or 2 years before stroke (control period). Conditional logistic regression was used to calculate the odds ratio (OR) and 95% confidence interval (95% CI) for the association between sepsis/septicemia and ischemic or hemorrhagic stroke. RESULTS: Ischemic (n=37 377) and hemorrhagic (n=12 817) strokes that occurred in 2009 were extracted where 3188 (8.5%) ischemic and 1101 (8.6%) hemorrhagic stroke patients had sepsis. Sepsis within 15 days before the stroke placed patients at the highest risk of ischemic (OR, 28.36; 95% CI, 20.02-40.10) and hemorrhagic stroke (OR, 12.10; 95% CI, 7.54-19.42); however, although the risk decreased, it remained elevated 181 to 365 days after sepsis for ischemic (OR, 2.59; 95% CI, 2.20-3.06) and hemorrhagic (OR, 3.92; 95% CI 3.29-4.69) strokes. There was an interaction with age (P=0.0006); risk of developing an ischemic stroke within 180 days of hospitalization for sepsis increased 18% with each 10-year decrease in age. CONCLUSIONS: Risk of stroke is high after sepsis, and this risk persists for up to a year. Younger sepsis patients have a particularly increased risk of stroke after sepsis.


Asunto(s)
Isquemia Encefálica/epidemiología , Hemorragia Cerebral/epidemiología , Hospitalización/estadística & datos numéricos , Sepsis/epidemiología , Accidente Cerebrovascular/epidemiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Isquemia Encefálica/etiología , Hemorragia Cerebral/etiología , Estudios Cruzados , Femenino , Humanos , Masculino , Persona de Mediana Edad , Sepsis/complicaciones , Accidente Cerebrovascular/etiología , Factores de Tiempo , Estados Unidos/epidemiología , Adulto Joven
10.
Stroke ; 48(10): 2875-2877, 2017 10.
Artículo en Inglés | MEDLINE | ID: mdl-28864597

RESUMEN

BACKGROUND AND PURPOSE: Case-control studies suggest that acute infection transiently increases the risk of childhood arterial ischemic stroke. We hypothesized that an unbiased pathogen discovery approach utilizing MassTag-polymerase chain reaction would identify pathogens in the blood of childhood arterial ischemic stroke cases. METHODS: The multicenter international VIPS study (Vascular Effects of Infection in Pediatric Stroke) enrolled arterial ischemic stroke cases, and stroke-free controls, aged 29 days through 18 years. Parental interview included questions on recent infections. In this pilot study, we used MassTag-polymerase chain reaction to test the plasma of the first 161 cases and 34 controls enrolled for a panel of 28 common bacterial and viral pathogens. RESULTS: Pathogen DNA was detected in no controls and 14 cases (8.7%): parvovirus B19 (n=10), herpesvirus 6 (n=2), adenovirus (n=1), and rhinovirus 6C (n=1). Parvovirus B19 infection was confirmed by serologies in all 10; infection was subclinical in 8. Four cases with parvovirus B19 had underlying congenital heart disease, whereas another 5 had a distinct arteriopathy involving a long-segment stenosis of the distal internal carotid and proximal middle cerebral arteries. CONCLUSIONS: Using MassTag-polymerase chain reaction, we detected parvovirus B19-a virus known to infect erythrocytes and endothelial cells-in some cases of childhood arterial ischemic stroke. This approach can generate new, testable hypotheses about childhood stroke pathogenesis.


Asunto(s)
Isquemia Encefálica/epidemiología , Infecciones por Parvoviridae/epidemiología , Parvovirus B19 Humano , Accidente Cerebrovascular/epidemiología , Adolescente , Isquemia Encefálica/diagnóstico , Isquemia Encefálica/virología , Estudios de Casos y Controles , Niño , Preescolar , Femenino , Humanos , Lactante , Masculino , Infecciones por Parvoviridae/diagnóstico , Parvovirus B19 Humano/aislamiento & purificación , Proyectos Piloto , Accidente Cerebrovascular/diagnóstico , Accidente Cerebrovascular/virología
11.
Cerebrovasc Dis ; 43(1-2): 43-53, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-27842319

RESUMEN

BACKGROUND: Although designated stroke centers (DSCs) improve the quality of care and clinical outcomes for ischemic stroke patients, less is known about the benefits of DSCs for patients with intracerebral hemorrhage (ICH) and subarachnoid hemorrhage (SAH). HYPOTHESIS: Compared to non-DSCs, hospitals with the DSC status have lower in-hospital mortality rates for hemorrhagic stroke patients. We believed these effects would sustain over a period of time after adjusting for hospital-level characteristics, including hospital size, urban location, and teaching status. METHODS AND RESULTS: We evaluated ICH (International Classification of Diseases, Ninth Revision; ICD-9: 431) and SAH (ICD-9: 430) hospitalizations documented in the 2008-2012 New York State Department of Health Statewide Planning and Research Cooperative System inpatient sample database. Generalized estimating equation logistic regression was used to evaluate the association between DSC status and in-hospital mortality. We calculated ORs and 95% CIs adjusted for clustering of patients within facilities, other hospital characteristics, and individual level characteristics. Planned secondary analyses explored other hospital characteristics associated with in-hospital mortality. In 6,352 ICH and 3,369 SAH patients in the study sample, in-hospital mortality was higher among those with ICH compared to SAH (23.7 vs. 18.5%). Unadjusted analyses revealed that DSC status was related with reduced mortality for both ICH (OR 0.7, 95% CI 0.5-0.8) and SAH patients (OR 0.4, 95% CI 0.3-0.7). DSC remained a significant predictor of lower in-hospital mortality for SAH patients (OR 0.6, 95% CI 0.3-0.9) but not for ICH patients (OR 0.8, 95% CI 0.6-1.0) after adjusting for patient demographic characteristics, comorbidities, hospital size, teaching status and location. CONCLUSIONS: Admission to a DSC was independently associated with reduced in-hospital mortality for SAH patients but not for those with ICH. Other patient and hospital characteristics may explain the benefits of DSC status on outcomes after ICH. For conditions with clear treatments such as ischemic stroke and SAH, being treated in a DSC improves outcomes, but this trend was not observed in those with strokes, in those who did not have clear treatment guidelines. Identifying hospital-level factors associated with ICH and SAH represents a means to identify and improve gaps in stroke systems of care.


Asunto(s)
Hemorragia Cerebral/mortalidad , Mortalidad Hospitalaria/tendencias , Unidades Hospitalarias/tendencias , Indicadores de Calidad de la Atención de Salud/tendencias , Accidente Cerebrovascular/mortalidad , Hemorragia Subaracnoidea/mortalidad , Anciano , Anciano de 80 o más Años , Hemorragia Cerebral/diagnóstico , Hemorragia Cerebral/terapia , Distribución de Chi-Cuadrado , Bases de Datos Factuales , Femenino , Tamaño de las Instituciones de Salud/tendencias , Hospitales de Enseñanza/tendencias , Hospitales Urbanos/tendencias , Humanos , Modelos Logísticos , Masculino , Persona de Mediana Edad , Análisis Multivariante , New York , Oportunidad Relativa , Admisión del Paciente/tendencias , Estudios Retrospectivos , Factores de Riesgo , Accidente Cerebrovascular/diagnóstico , Accidente Cerebrovascular/terapia , Hemorragia Subaracnoidea/diagnóstico , Hemorragia Subaracnoidea/terapia , Factores de Tiempo
12.
Stroke ; 47(3): 659-67, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26888535

RESUMEN

BACKGROUND AND PURPOSE: We hypothesized that concentrations of interleukin 6 (IL-6), serum amyloid A, tumor necrosis factor-α receptor 1, CD40 ligand, and monocyte chemoattractant protein 1 would predict recurrent ischemic stroke and major vascular events after recent lacunar stroke. METHODS: Levels of Inflammatory Markers in the Treatment of Stroke (LIMITS) was an international, multicenter, prospective ancillary biomarker study nested within the Secondary Prevention of Small Subcortical Strokes (SPS3) study, a Phase III trial in patients with recent lacunar stroke. Crude and Adjusted Cox proportional hazards models were used to calculate hazard ratios (HRs) and 95% confidence intervals (95% CI) for recurrence risks. RESULTS: Among 1244 patients with lacunar stroke (mean age, 63.3±10.8 years), there were 115 major vascular events (stroke, myocardial infarction, and vascular death). The risk of major vascular events increased with elevated concentrations of both tumor necrosis factor-α receptor 1 (adjusted HR per SD, 1.21; 95% CI, 1.05-1.41; P=0.01) and IL-6 (adjusted HR per SD, 1.10; 95% CI, 1.02-1.19; P=0.008). Compared with the bottom quartile (tumor necrosis factor-α receptor 1 <2.24 ng/L), those in the top quartile of tumor necrosis factor-α receptor 1 (>3.63 ng/L) were at twice the risk of major vascular events after adjusting for demographics (partially adjusted HR, 1.98; 95% CI, 1.11-3.52), though the effect attenuated after adjusting for other risk factors and statin use (adjusted HR, 1.68; 95% CI, 0.93-3.04). Serum amyloid A, CD40 ligand, and monocyte chemoattractant protein 1 were not associated with prognosis. CONCLUSIONS: Among recent lacunar stroke patients, IL-6 and TNF receptor concentrations predict risk of recurrent vascular events, and they are associated with the effect of antiplatelet therapies. CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Unique identifier: NCT00059306.


Asunto(s)
Mediadores de Inflamación/sangre , Interleucina-6/sangre , Receptores Tipo I de Factores de Necrosis Tumoral/sangre , Accidente Vascular Cerebral Lacunar/sangre , Accidente Vascular Cerebral Lacunar/diagnóstico , Anciano , Biomarcadores/sangre , Femenino , Humanos , Masculino , Persona de Mediana Edad , Inhibidores de Agregación Plaquetaria/administración & dosificación , Estudios Prospectivos , Factores de Riesgo , Accidente Vascular Cerebral Lacunar/tratamiento farmacológico , Resultado del Tratamiento
13.
Stroke ; 45(4): 979-87, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24627113

RESUMEN

BACKGROUND AND PURPOSE: Interleukin-6 (IL-6) is a proinflammatory cytokine with known autoregulatory feedback mechanisms. We hypothesized that elevated high-sensitivity C-reactive protein (hsCRP) relative to IL-6 confers an increased risk of ischemic stroke (IS), and low hsCRP relative to IL-6 a decreased risk, for individuals in the prospective, multiethnic, population-based Northern Manhattan Study (NOMAS). METHODS: Serum hsCRP and IL-6 were measured in NOMAS participants at baseline. We created a trichotomized predictor based on the dominant biomarker in terms of quartiles: hsCRP-dominant, IL-6-dominant, and codominant groups. Cox proportional hazards models were used to calculate hazard ratios and 95% confidence intervals for the association between inflammatory biomarker group status and risk of incident IS. RESULTS: Of 3298 participants, both hsCRP and IL-6 were available in 1656 participants (mean follow-up, 7.8 years; 113 incident IS). The hsCRP-dominant group had increased risk of IS (adjusted hazard ratio, 2.62; 95% confidence interval, 1.56-4.41) and the IL-6-dominant group had decreased risk (adjusted hazard ratio, 0.38; 95% confidence interval, 0.18-0.82) when compared with the referent group, after adjusting for potential confounders. Model fit was improved using the inflammation-dominant construct, over either biomarker alone. CONCLUSIONS: In this multiethnic cohort, when hsCRP-quartile was higher than IL-6 quartile, IS risk was increased, and conversely when IL-6 quartiles were elevated relative to hsCRP, IS risk was decreased. Construct validity requires confirmation in other cohorts.


Asunto(s)
Isquemia Encefálica , Proteína C-Reactiva/metabolismo , Interleucina-6/sangre , Accidente Cerebrovascular , Adulto , Anciano , Biomarcadores/sangre , Isquemia Encefálica/epidemiología , Isquemia Encefálica/inmunología , Isquemia Encefálica/metabolismo , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Inflamación/epidemiología , Inflamación/inmunología , Inflamación/metabolismo , Masculino , Persona de Mediana Edad , Ciudad de Nueva York/epidemiología , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Factores de Riesgo , Accidente Cerebrovascular/epidemiología , Accidente Cerebrovascular/inmunología , Accidente Cerebrovascular/metabolismo
14.
Stroke ; 45(3): 707-16, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24523037

RESUMEN

BACKGROUND AND PURPOSE: Inflammatory biomarkers predict incident and recurrent cardiac events, but their relationship to stroke prognosis is uncertain. We hypothesized that high-sensitivity C-reactive protein (hsCRP) predicts recurrent ischemic stroke after recent lacunar stroke. METHODS: Levels of Inflammatory Markers in the Treatment of Stroke (LIMITS) was an international, multicenter, prospective ancillary biomarker study nested within Secondary Prevention of Small Subcortical Strokes (SPS3), a phase III trial in patients with recent lacunar stroke. Patients were assigned in factorial design to aspirin versus aspirin plus clopidogrel, and higher versus lower blood pressure targets. Patients had blood samples collected at enrollment and hsCRP measured using nephelometry at a central laboratory. Cox proportional hazard models were used to calculate hazard ratios (HRs) and 95% confidence intervals (95% CIs) for recurrence risks before and after adjusting for demographics, comorbidities, and statin use. RESULTS: Among 1244 patients with lacunar stroke (mean age, 63.3±10.8 years), median hsCRP was 2.16 mg/L. There were 83 recurrent ischemic strokes (including 45 lacunes) and 115 major vascular events (stroke, myocardial infarction, and vascular death). Compared with the bottom quartile, those in the top quartile (hsCRP>4.86 mg/L) were at increased risk of recurrent ischemic stroke (unadjusted HR, 2.54; 95% CI, 1.30-4.96), even after adjusting for demographics and risk factors (adjusted HR, 2.32; 95% CI, 1.15-4.68). hsCRP predicted increased risk of major vascular events (top quartile adjusted HR, 2.04; 95% CI, 1.14-3.67). There was no interaction with randomized antiplatelet treatment. CONCLUSIONS: Among recent lacunar stroke patients, hsCRP levels predict the risk of recurrent strokes and other vascular events. hsCRP did not predict the response to dual antiplatelets. CLINICAL TRIAL REGISTRATION URL: http://www.clinicaltrials.gov. Unique identifier: NCT00059306.


Asunto(s)
Biomarcadores/sangre , Proteína C-Reactiva/análisis , Mediadores de Inflamación/sangre , Accidente Vascular Cerebral Lacunar/sangre , Anciano , Antihipertensivos/uso terapéutico , Aspirina/uso terapéutico , Presión Sanguínea/efectos de los fármacos , Clopidogrel , Estudios de Cohortes , Intervalos de Confianza , Femenino , Humanos , Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Masculino , Persona de Mediana Edad , Flebotomía , Inhibidores de Agregación Plaquetaria/uso terapéutico , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Recurrencia , Tamaño de la Muestra , Ticlopidina/análogos & derivados , Ticlopidina/uso terapéutico , Resultado del Tratamiento
15.
Catheter Cardiovasc Interv ; 84(1): 30-6, 2014 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-23934606

RESUMEN

OBJECTIVES: This study was designed to evaluate the efficacy and safety of the CardioDex arterial closure device, which is a novel femoral artery closure device used following percutaneous cardiac catheterization. BACKGROUND: Current devices utilized to achieve hemostasis of the femoral artery following percutaneous cardiac catheterization include collagen plug and suture mediated devices, but are associated with significant vascular complications. The CardioDex closure device utilizes thermal energy to cause collagen shrinking and swelling and thereby, achieve hemostasis. METHODS: The device was evaluated in a prospective nonrandomized single-center trial with patients undergoing 6F invasive cardiac procedures. Femoral artery puncture closure was performed immediately at completion of the procedure, followed by 3-4 minutes of manual compression. Time to hemostasis (TTH), time to ambulation (TTA), and short-term clinical follow-up data were collected. RESULTS: A total of 34 patients including 21 diagnostic and 13 interventional cases were evaluated. The median TTH was 3 min in diagnostic and 4 min in interventional cases. TTH was independent of activated clotting time (ACT). The median TTA was 2.75 hr and 3.37 hr in diagnostic and interventional groups, respectively. There were no major adverse events identified at 1 week and 30 day follow up. CONCLUSIONS: This first in human clinical experience with the CardioDex closure device demonstrates that in the small cohort studied, it is safe and effective in diagnostic cardiac catheterization and also in interventional cases on mild anticoagulation (mean ACT = 188 sec). It has the advantage of leaving no foreign material in the body following use.


Asunto(s)
Cateterismo Cardíaco/métodos , Arteria Femoral/cirugía , Hemostasis Quirúrgica/instrumentación , Hemorragia Posoperatoria/cirugía , Punciones/métodos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Diseño de Equipo , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Adulto Joven
16.
Gac Med Mex ; 150(1): 29-34, 2014.
Artículo en Español | MEDLINE | ID: mdl-24481429

RESUMEN

OBJECTIVE: To compare the lifestyle and metabolic control of diabetes patients included and not included in the DiabetIMSS program. METHODS: Subjects with diabetes in the DiabetIMSS program and the general clinic were divided into three groups: group 1 first attended the program, group 2 were enrolled during the study, and group 3 had not been included the program. Demographic and clinical aspects were measured and the IMEVID instrument was applied. RESULTS: We included 539 type-2 diabetes patients, predominantly females (73.3%), mainly of primary school level, and more frequently on double-drug therapy. There were clinical differences between the three groups for program leavers in terms of weight, waist, blood pressure, fasting glucose, HbA1c, triglycerides, and IMEVID qualification, all p < 0.05; correlation analysis of the variables with the qualification of IMEVID was significant at p < 0.05. The higher number of variable control targets was for leavers (71% of group); those who were enrolled in the study was 32%, and who had not was 17.2%. CONCLUSIONS: There are significant differences in lifestyle and control target parameters in subjects who completed the DiabetIMSS program.


Asunto(s)
Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/metabolismo , Estilo de Vida , Adulto , Anciano , Anciano de 80 o más Años , Estudios Transversales , Diabetes Mellitus Tipo 2/sangre , Femenino , Humanos , Masculino , México , Persona de Mediana Edad , Estudios Prospectivos , Seguridad Social , Adulto Joven
17.
J Infect Public Health ; 17(7): 102444, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38815534

RESUMEN

BACKGROUND: Information on Paxlovid™ effectiveness must be monitored and updated in real world scenarios. Our research question was what is the effectiveness of Paxlovid™ in adult patients with COVID-19? Therefore, we investigated the effectiveness of Paxlovid™ on reducing the incidence of pneumonia, hospitalization, and mortality in a cohort of COVID-19 positive adult patients from northeast Mexico. METHODS: A retrospective cohort study of COVID-19 positive adult patients from Nuevo Leon, Mexico from December 2020 to May 2023 (after Omicron BA-5 circulation) was performed. Paxlovid™ use was authorized in September 2022. Therefore, we analyzed effectiveness in patients with confirmed diagnosis who met selection criteria between September 2022 and May 2023 (n = 20,799; 5,673 with and 15,126 without Paxlovid™). RESULTS: The pneumonia (0.1% vs. 0.4%, p < 0.0001), hospitalization (0.1% vs. 1.2%, p < 0.0001), and death rates (0.04% vs. 0.2%, p < 0.0001) were lower in patients with Paxlovid™ treatment independently of age, sex, comorbidity, and COVID-19 and pneumococcal vaccination history. Effectiveness was 88.2%, 95.9% y 91.9% for pneumonia, hospitalization, and death, respectively. CONCLUSIONS: Paxlovid™ reduces the presentation of pneumonia, hospitalization, and death secondary to COVID-19. It is recommended to continue monitoring Paxlovid™ effectiveness, as other SARS-CoV-2 variants continue to emerge.


Asunto(s)
COVID-19 , Hospitalización , SARS-CoV-2 , Humanos , Masculino , México/epidemiología , Femenino , Hospitalización/estadística & datos numéricos , Estudios Retrospectivos , Persona de Mediana Edad , COVID-19/mortalidad , COVID-19/epidemiología , COVID-19/prevención & control , Incidencia , Adulto , Anciano , Tratamiento Farmacológico de COVID-19 , Neumonía/mortalidad , Neumonía/epidemiología , Neumonía/prevención & control , Anciano de 80 o más Años
18.
Front Public Health ; 12: 1402527, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38932780

RESUMEN

Introduction: The end of the coronavirus disease 2019 (COVID-19) pandemic has been declared by the World Health Organization on May 5, 2023. Several vaccines were developed, and new data is being published about their effectiveness. However, the clinical trials for the vaccines were performed before the Omicron variant appeared and there are population groups where vaccine effectiveness still needs to be tested. The overarching goal of the present study was to analyze the effects of COVID-19 vaccination before and after the Omicron variant in patients considering comorbidities in a population from Nuevo Leon, Mexico. Methods: Epidemiological COVID-19 data from the Mexican Social Security Institute were collected from 67 hospitals located in northeastern Mexico, from July 2020 to May 2023, and a total of 669,393 cases were compiled, 255,819 reported a SARS-CoV-2 positive reverse transcription quantitative polymerase chain reaction (RT-qPCR) test or a positive COVID-19 antigen rapid test. Results: Before Omicron (BO, 2020-2021), after 14 days of two doses of COVID-19 vaccine, BNT162b2 and ChAdOx1 vaccines were effective against infection in non-comorbid and all comorbid subgroups, whereas after Omicron (AO, 2022- 2023) there was no significant effectiveness against infection with none of the vaccines. Regarding hospitalization BO, BNT162b2, ChAdOx1, CoronaVac and mRNA-1273 significantly protected non-comorbid patients whereas BNT162b2, ChAdOx1, and mRNA-1273, protected all comorbid subgroups against hospitalization. AO, BNT162b2, ChAdOx1, CoronaVac and mRNA-1273 were effective against hospitalization in non-comorbid patients whereas for most comorbid subgroups BNT162b2, ChAdOx1 and CoronaVac were effective against hospitalization. Non-comorbid patients were protected against death as an outcome of COVID-19 during the BO period with most vaccines whereas a reduction in effectiveness was observed AO with mRNA-1273 vaccines in patients with hypertension, and diabetes mellitus. Discussion: BO, COVID-19 vaccines were effective against infection, hospitalization, and death whereas AO, COVID-19 vaccines failed to protect the population from COVID-19 infection. A varying effectiveness against hospitalization and death is observed AO.


Asunto(s)
Vacunas contra la COVID-19 , COVID-19 , Comorbilidad , SARS-CoV-2 , Eficacia de las Vacunas , Humanos , COVID-19/prevención & control , COVID-19/epidemiología , México/epidemiología , Vacunas contra la COVID-19/administración & dosificación , Persona de Mediana Edad , Femenino , Masculino , Eficacia de las Vacunas/estadística & datos numéricos , Estudios Retrospectivos , SARS-CoV-2/inmunología , Adulto , Anciano , Adolescente , Adulto Joven
19.
Biomedica ; 44(Sp. 1): 182-197, 2024 05 31.
Artículo en Inglés, Español | MEDLINE | ID: mdl-39079149

RESUMEN

INTRODUCTION: Heart failure and type 2 diabetes mellitus are critical public health issues. OBJECTIVE: To characterize the risk factors for mortality in patients with heart failure and type 2 diabetes mellitus from a large registry in Colombia and to evaluate the potential effect modifications by type 2 diabetes mellitus over other risk factors. MATERIALS AND METHODS: Heart failure patients with and without type 2 diabetes mellitus enrolled in the Registro Colombiano de Falla Cardíaca (RECOLFACA) were included. RECOLFACA enrolled adult patients with heart failure diagnosis from 60 medical centers in Colombia during 2017-2019. The primary outcome was all-cause mortality. Survival analysis was performed using adjusted Cox proportional hazard models. RESULTS: A total of 2514 patients were included, and the prevalence of type 2 diabetes mellitus was 24.7% (n = 620). We found seven independent predictors of short-term mortality for the general cohort, chronic obstructive pulmonary disease, sinus rhythm, triple therapy, nitrates use, statins use, anemia, and hyperkalemia. In the type 2 diabetes mellitus group, only the left ventricle diastolic diameter was an independent mortality predictor (HR = 0.96; 95% CI: 0.93-0.98). There was no evidence of effect modification by type 2 diabetes mellitus on the relationship between any independent predictors and all-cause mortality. However, a significant effect modification by type 2 diabetes mellitus between smoking and mortality was observed. CONCLUSIONS: Patients with type 2 diabetes mellitus had higher mortality risk. Our results also suggest that type 2 diabetes mellitus diagnosis does not modify the effect of the independent risk factors for mortality in heart failure evaluated. However, type 2 diabetes mellitus significantly modify the risk relation between mortality and smoking in patients with heart failure.


Introducción. La insuficiencia cardíaca y la diabetes mellitus de tipo 2 son problemas críticos de salud pública. Objetivo. Caracterizar los factores de riesgo de mortalidad en pacientes con insuficiencia cardíaca y la diabetes mellitus de tipo 2 de un registro grande en Colombia y evaluar las posibles modificaciones del efecto de la diabetes mellitus de tipo 2 sobre otros factores de riesgo. Materiales y métodos. Se incluyeron pacientes con insuficiencia cardíaca con y sin diabetes mellitus de tipo 2, inscritos en el Registro Colombiano de Insuficiencia Cardíaca (RECOLFACA). RECOLFACA incorporó pacientes adultos con diagnóstico de insuficiencia cardíaca de 60 centros médicos de Colombia durante 2017-2019. El resultado primario fue la mortalidad por todas las causas. El análisis de supervivencia se realizó utilizando modelos ajustados de riesgos proporcionales de Cox. Resultados. Se incluyeron 2.514 pacientes, la prevalencia de diabetes mellitus de tipo 2 fue del 24,7 % (n = 620). Encontramos siete predictores independientes de mortalidad a corto plazo para la enfermedad pulmonar obstructiva crónica del grupo sin diabetes mellitus de tipo 2, el ritmo sinusal, la terapia triple, el uso de nitratos, el uso de estatinas, la anemia y la hiperpotasemia. En el grupo de diabetes mellitus de tipo 2, solo el diámetro diastólico del ventrículo izquierdo fue un predictor de mortalidad independiente (HR = 0,96; IC95 %: 0,93 - 0,98). No hubo evidencia de modificación del efecto de la diabetes mellitus de tipo 2 sobre la relación entre ningún predictor independiente y la mortalidad por todas las causas. Sin embargo, se observó una modificación significativa del efecto de la diabetes mellitus de tipo 2 entre el tabaquismo y la mortalidad. Conclusiones. Los pacientes con diabetes mellitus de tipo 2 tuvieron mayor riesgo de mortalidad. Los resultados también sugieren que el diagnóstico de diabetes mellitus de tipo 2 no modifica el efecto de los factores de riesgo independientes de mortalidad en IC evaluados. Sin embargo, la diabetes mellitus de tipo 2 modifica significativamente la relación de riesgo entre mortalidad y tabaquismo en pacientes con insuficiencia cardíaca, posiblemente debido a un efecto sinérgico negativo que resulta en lesión vascular.


Asunto(s)
Diabetes Mellitus Tipo 2 , Insuficiencia Cardíaca , Humanos , Insuficiencia Cardíaca/mortalidad , Insuficiencia Cardíaca/complicaciones , Insuficiencia Cardíaca/epidemiología , Diabetes Mellitus Tipo 2/complicaciones , Colombia/epidemiología , Masculino , Femenino , Anciano , Persona de Mediana Edad , Factores de Riesgo , Sistema de Registros , Modelos de Riesgos Proporcionales
20.
Age Ageing ; 42(3): 385-90, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23321203

RESUMEN

OBJECTIVE: to study the association between soluble tumour necrosis factor receptor 1 (sTNFR1) levels and mortality in the population-based Northern Manhattan Study (NOMAS). METHODS: NOMAS is a multi-ethnic, community-based cohort study with mean 8.4 years of follow-up. sTNFR1 was measured using ELISA. Cox proportional hazards models were used to calculate hazard ratios and 95% confidence intervals (HR, 95% CI) for the association of sTNFR1 with risk of all-cause mortality after adjusting for relevant confounders. RESULTS: sTNFR1 measurements were available in 1,862 participants (mean age 69.2 ± 10.2 years) with 512 all-cause deaths. Median sTNFR1 was 2.28 ng/ml. Those with sTNFR1 levels in the highest quartile (Q4), compared with those with sTNFR1 in the lowest quartile (Q1), were at an increased risk of all-cause mortality (adjusted HR: 1.8, 95% CI: 1.4-2.4) and non-vascular mortality (adjusted HR: 2.5, 95% CI: 1.5-3.6), but not vascular mortality (adjusted HR: 1.3, 95% CI: 0.9-1.9). There were interactions between sTNFR1 quartiles and medical insurance-status [likelihood ratio test (LRT) with 3 degrees of freedom, Pinteraction = 0.02] and alcohol consumption (LRT with 3 degrees of freedom, Pinteraction < 0.01) for all-cause mortality. In participants with no insurance or Medicaid, those with sTNFR1 in the top quartile had nearly a threefold increased risk of total mortality than the lowest quartile (adjusted HR: 2.9, 95% CI: 1.9-4.4). CONCLUSION: in this multi-ethnic cohort, sTNFR1 was associated with all-cause and non-vascular mortality, particularly among those of a lower socioeconomic status.


Asunto(s)
Etnicidad/estadística & datos numéricos , Mediadores de Inflamación/sangre , Inflamación/sangre , Inflamación/etnología , Inflamación/mortalidad , Receptores Tipo I de Factores de Necrosis Tumoral/sangre , Negro o Afroamericano/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , Consumo de Bebidas Alcohólicas/etnología , Consumo de Bebidas Alcohólicas/mortalidad , Biomarcadores/sangre , Femenino , Estudios de Seguimiento , Hispánicos o Latinos/estadística & datos numéricos , Humanos , Seguro de Salud/estadística & datos numéricos , Funciones de Verosimilitud , Masculino , Medicaid/estadística & datos numéricos , Persona de Mediana Edad , Mortalidad/etnología , Ciudad de Nueva York/epidemiología , Oportunidad Relativa , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Medición de Riesgo , Factores de Riesgo , Clase Social , Factores de Tiempo , Estados Unidos/epidemiología , Salud Urbana/etnología , Población Blanca/estadística & datos numéricos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA