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1.
Angiogenesis ; 27(3): 351-373, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38498232

RESUMEN

Age-related macular degeneration (AMD) is a common retinal neurodegenerative disease among the elderly. Neovascular AMD (nAMD), a leading cause of AMD-related blindness, involves choroidal neovascularization (CNV), which can be suppressed by anti-angiogenic treatments. However, current CNV treatments do not work in all nAMD patients. Here we investigate a novel target for AMD. Granzyme B (GzmB) is a serine protease that promotes aging, chronic inflammation and vascular permeability through the degradation of the extracellular matrix (ECM) and tight junctions. Extracellular GzmB is increased in retina pigment epithelium (RPE) and mast cells in the choroid of the healthy aging outer retina. It is further increased in donor eyes exhibiting features of nAMD and CNV. Here, we show in RPE-choroidal explant cultures that exogenous GzmB degrades the RPE-choroid ECM, promotes retinal/choroidal inflammation and angiogenesis while diminishing anti-angiogenic factor, thrombospondin-1 (TSP-1). The pharmacological inhibition of either GzmB or mast-cell degranulation significantly reduces choroidal angiogenesis. In line with our in vitro data, GzmB-deficiency reduces the extent of laser-induced CNV lesions and the age-related deterioration of electroretinogram (ERG) responses in mice. These findings suggest that targeting GzmB, a serine protease with no known endogenous inhibitors, may be a potential novel therapeutic approach to suppress CNV in nAMD.


Asunto(s)
Neovascularización Coroidal , Matriz Extracelular , Granzimas , Inflamación , Mastocitos , Epitelio Pigmentado de la Retina , Granzimas/metabolismo , Neovascularización Coroidal/metabolismo , Neovascularización Coroidal/patología , Animales , Matriz Extracelular/metabolismo , Matriz Extracelular/patología , Humanos , Epitelio Pigmentado de la Retina/metabolismo , Epitelio Pigmentado de la Retina/patología , Inflamación/patología , Inflamación/metabolismo , Ratones , Mastocitos/metabolismo , Mastocitos/patología , Mastocitos/enzimología , Trombospondina 1/metabolismo , Trombospondina 1/genética , Ratones Endogámicos C57BL , Coroides/patología , Coroides/metabolismo , Coroides/irrigación sanguínea , Degeneración Macular/patología , Degeneración Macular/metabolismo , Ratones Noqueados
3.
BMC Gastroenterol ; 19(1): 199, 2019 Nov 27.
Artículo en Inglés | MEDLINE | ID: mdl-31775657

RESUMEN

BACKGROUND: Drug induced liver injury (DILI) is an important cause of acute liver injury and accounts for approximately 10% of all cases of acute hepatitis. Both prescription and natural health products (NHPs) have been implicated in DILI. There is a dearth of studies on NHPs induced liver injury. CASE PRESENTATION: A previously healthy 37-year-old female presented with subacute hepatitis, in the context of a previous admission to a separate institution, months prior for undiagnosed acute hepatitis. Importantly, she had disclosed taking complex regiments of natural health products (NHPs) for months. Her only other medication was rivaroxaban for her homozygous Factor V Leiden deficiency. She had an extensive work up for causes of acute and unresolving hepatitis. She discontinued several but not all of her NHPs after her initial presentation for acute hepatitis at the first institution and continued taking NHPs until shortly after admission to our institution. The predominant pathological features were that of drug induced liver injury, although an abnormal amount of copper was noted in the core liver biopsies. However, Wilson's disease was ruled out with normal serum ceruloplasmin and 24-urine copper. After 2 months of stopping all the NHPs, our patient improved significantly since discharge, although there is evidence of fibrosis on ultrasound at last available follow up. CONCLUSION: NHPs are a well-established but poorly understood etiology of DILI. The situation is exacerbated by the unregulated and unpredictable nature of many of the potential hepatotoxic effects of these agents, especially in cases of multiple potential toxic agents. This highlights the importance of acquiring a clear history of all medications regardless of prescription status.


Asunto(s)
Enfermedad Hepática Inducida por Sustancias y Drogas/diagnóstico , Suplementos Dietéticos/efectos adversos , Fitoterapia/efectos adversos , Adulto , Enfermedad Hepática Inducida por Sustancias y Drogas/etiología , Diagnóstico Diferencial , Femenino , Degeneración Hepatolenticular/diagnóstico , Humanos
4.
Ann Hepatol ; 18(4): 651-654, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31056363

RESUMEN

Rapid overcorrection of chronic hyponatremia can lead to osmotic demyelination syndrome or central pontine myelinolysis (CPM), a diagnosis often triggered by observing the characteristics of neurological abnormalities developed as a result of CPM. However, anyone with chronic hyponatremia and overcorrection of serum sodium is at risk of physiological CPM despite the lack of clinical symptoms. We report an adult patient who presented as post-op delirium, had incidental finding of CPM by magnetic resonance imaging (MRI) of the head after a liver transplant. Despite his non-typical presentation, the patient had the typical risk factors of CPM such as chronic hyponatremia, rapid overcorrection of serum sodium and cirrhosis undergoing a transplant. As hyponatremia and neurological disorder such encephalopathy simultaneously affect patients with cirrhosis, CPM may be more common than once thought in the chronic liver disease population and inappropriate hyponatremia management has important medical consequences that can go unnoticed.


Asunto(s)
Delirio/diagnóstico , Fluidoterapia/métodos , Hiponatremia/terapia , Hallazgos Incidentales , Cirrosis Hepática Biliar/cirugía , Trasplante de Hígado , Mielinólisis Pontino Central/diagnóstico por imagen , Complicaciones Posoperatorias/diagnóstico por imagen , Delirio/complicaciones , Fluidoterapia/efectos adversos , Humanos , Hiponatremia/sangre , Cirrosis Hepática Biliar/sangre , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Mielinólisis Pontino Central/complicaciones , Mielinólisis Pontino Central/etiología , Cuidados Preoperatorios
5.
J Occup Health Psychol ; 29(5): 342-358, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39172435

RESUMEN

Physical exercise is widely recognized for its benefits to individuals' general health, yet its implications for in-role and extrarole job performance, especially on demanding workdays, have rarely been explored. This oversight is concerning as high work demands can deter employees from exercising when they are unaware that exercise can improve their job performance on demanding workdays. In this research, we draw on the effort-recovery model to propose that daily physical exercise not only promotes next-day well-being but also enhances next-day in-role job performance and extrarole organizational citizenship behavior (OCB) by fostering positive affect and work engagement the following day. Moreover, these benefits of daily physical exercise are more pronounced on days with high rather than low work demands. Results from two experience sampling studies generally support our hypotheses, revealing that daily physical exercise contributes to next-day well-being, both self- and leader-rated in-role job performance and self-rated, but not leader-rated, extrarole OCB, through the sequential mediation of next-morning positive affect and next-day work engagement. Furthermore, these benefits of physical exercise are more evident on days when employees face high overall work demands (Study 1) and in particular on days with high-hindrance demands but on days with low-challenge demands (Study 2). (PsycInfo Database Record (c) 2024 APA, all rights reserved).


Asunto(s)
Ejercicio Físico , Rendimiento Laboral , Humanos , Masculino , Femenino , Adulto , Ejercicio Físico/psicología , Persona de Mediana Edad , Carga de Trabajo/psicología , Adulto Joven , Compromiso Laboral , Encuestas y Cuestionarios , Satisfacción en el Trabajo
6.
J Parkinsons Dis ; 14(s1): S21-S34, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38251061

RESUMEN

The aim of this review is to examine the intersection of Parkinson's disease (PD) with nutrition, to identify best nutritional practices based on current evidence, and to identify gaps in the evidence and suggest future directions. Epidemiological work has linked various dietary patterns and food groups to changes in PD risk; however, fewer studies have evaluated the role of various diets, dietary components, and supplements in the management of established PD. There is substantial interest in exploring the role of diet-related interventions in both symptomatic management and potential disease modification. In this paper, we evaluate the utility of several dietary patterns, including the Mediterranean (MeDi), Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND), Alternative Healthy Eating Index (AHEI), vegan/vegetarian, and ketogenic diet in persons with PD. Additionally, we provide an overview of the evidence relating several individual food groups and nutritional supplements to PD risk, symptoms and progression.


Asunto(s)
Enfermedad de Parkinson , Humanos , Enfermedad de Parkinson/dietoterapia , Dieta Mediterránea , Dieta Cetogénica , Suplementos Dietéticos , Dieta
7.
Can Geriatr J ; 27(1): 1-19, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38433879

RESUMEN

Background: Older adults with cirrhosis have complex medical needs that are not satisfied by organ specific management. Interdisciplinary approach may mitigate comorbidity and improve patient satisfaction. Methods: A pilot study consisted of dual specialist interdisciplinary referral pathway and mixed virtual care delivery model are prospectively evaluated in older adults (65 years and older) with cirrhosis during the COVID-19 pandemic between September and December 2022. Participant attitudes towards telemedicine were surveyed. Results: 68 participants with cirrhosis were consecutively assessed by hepatology. The mean age was 73 years. 39 (57%) screened positive for one or more geriatric syndrome(s). Comprehensive geriatric assessments were conducted via telemedicine in 18 participants, with additional referrals to physiotherapy and nutritional education. Compared to a historic cohort matched for age, sex, and Child-Pugh class, acute health service utilization measured by ER visits among those received dual specialist interdisciplinary consultation were lowered by 1.11 per patient at three-month follow up period (p = .0006, 95% CI 0.47-1.74). Majority participants (87.6%) preferred telemedicine or mixed method visits. Conclusion: An interdisciplinary approach to older adults with cirrhosis will likely be beneficial, and routine screening for geriatric syndrome may lead to reduced acute health-care utilization in the short term. Telemedicine and virtual screening tools in seniors should be fully explored to improve access to care.

8.
PLoS One ; 18(3): e0278356, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37000812

RESUMEN

BACKGROUND AND AIMS: Oral probiotic supplementation may be a beneficial adjunctive therapy for patients with symptomatic COVID-19. However, its safety and efficacy are unclear. We aimed to investigate how probiotic supplementation impacts COVID-19 symptom trajectory and patient outcomes by conducting a systematic review and meta-analysis of randomized controlled trials (RCTs). METHODS: RCTs randomizing patients with COVID-19 to probiotics were searched in PubMed Central, Embase, CINAHL, and Cochrane Library from inception to July 31, 2022. We performed a random-effects pairwise meta-analysis for all outcomes using the restricted maximum likelihood (REML) estimator. We used the GRADE approach to assess the certainty of the evidence. RESULTS: A total of 1027 participants from eight RCT studies were included in the meta-analysis. Probiotic supplements probably reduce the incidence of diarrhea (RR 0.61 [0.43 to 0.87]; moderate certainty) and probably reduce cough or dyspnea compared to placebo/standard care (RR 0.37 [0.19 to 0.73]; moderate certainty). Probiotic supplements may improve composite endpoint measured by clinical escalation or mortality compared to placebo (RR 0.41 [0.18 to 0.93]; low certainty evidence); however, they may not significantly reduce the need for clinical escalation (RR 0.57 [0.31 to 1.07]; low certainty evidence) or mortality (RR 0.50 [0.20 to 1.29]; low certainty evidence). In addition, the probiotic supplement is associated with reduced adverse events (RR 0.62 [0.46 to 0.83]; moderate certainty). CONCLUSION: Early probiotic supplement is a safe and effective adjunctive therapy that reduces the risk of symptoms and health care burden related to COVID-19 across all severity types.


Asunto(s)
COVID-19 , Probióticos , Humanos , COVID-19/complicaciones , Probióticos/efectos adversos , Diarrea/etiología , Atención Odontológica
9.
Can Liver J ; 6(3): 332-346, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-38020192

RESUMEN

Background: Individuals infected with hepatitis B (HBV), hepatitis C (HCV), and human immunodeficiency (HIV) viruses can experience compensated advanced chronic liver disease (cACLD) leading to esophageal varices (EV). In patients at low risk of esophageal varices needing treatment (EVNT), non-invasive criteria based on liver stiffness measurement (LSM) with platelets, or fibrosis biomarkers, may avoid unnecessary screening esophagogastroduodenoscopies (EGD). These approaches have not been compared among people infected with HIV, HBV, and HCV patients. Methods: Patients with a diagnosis of cACLD (LSM ≥10 kPa) and EGD availability were included from two cohorts. Baveno VI and expanded Baveno VI criteria (based on LSM and platelets), fibrosis biomarkers Fibrosis-4 Index (FIB-4), AST-to-Platelets Ratio Index (APRI), AST-to-ALT ratio (AAR), and RESIST criteria (based on platelets and albumin) were applied to determine the proportion of spared EGD and of missed EVNT. Results: Three hundred fifty three patients (30.6% with HIV, 25.3% monoinfected with HBV, and 44.1% with HCV) were included. The prevalence of EVNT was 8.2%. Both Baveno VI and expanded Baveno VI criteria performed well in patients with virus-related cACLD, by sparing 26.1% and 51.6% EGD, respectively, while missing <2% EVNT. The proportion of spared EGD were 48.2%, 58%, and 24.3% by FIB-4 (<2.78), APRI (<1.1), and AAR (<0.75), respectively, while missing <3% EVNT. RESIST criteria spared 47.8% EGD while missing 1.9% EVNT. Conclusions: Non-invasive criteria based on LSM can spare unnecessary EGD in virus-related cACLD. Simple fibrosis biomarkers can ameliorate resource utilization for EVNT screening in low resource settings.

10.
Can Liver J ; 6(2): 201-214, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-37503519

RESUMEN

Background: Exception points for liver transplant (LT) allocation are used to account for mortality risk not reflected by scoring systems such as the Model for End-Stage Liver Disease with sodium (MELD-Na). Currently, there is no formal policy regarding exception points in Canada, and differences across the country are not well understood. As such, a review of the criteria and exception points granted throughout the country for LT was conducted. Methods: Seven LT centres in five provinces were surveyed (Vancouver, Edmonton, London, Toronto, Montréal, Halifax) regarding the indications and criteria for exception points granted, the number of points granted, how points would be accrued, and the maximum points granted. Results: Programs in British Columbia and Nova Scotia grant variable exception points based on the median MELD-Na score with modifications; Alberta, Ontario, and Quebec grant exception points using specific values based on the indication. Overall, there was significant heterogeneity regarding exception points granted nationally with agreement only for awarding exception points for hepatopulmonary syndrome and polycystic liver disease. The second most common agreed-upon indications for exception points were portopulmonary hypertension and recurrent cholangitis offered by four provinces. Quebec had the most formal criteria for non-cirrhosis-based conditions. Conclusions: There is substantial variance across the country regarding the indications for granting exception points as well as the number of points granted. Future work on developing a national consensus will be important for the development of equity in LT across Canada.

11.
Can Liver J ; 5(2): 160-164, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35991484

RESUMEN

A 33-year-old male with no relevant medical history presented with a few months of fatigue and reduced exercise tolerance and was found to have iron-deficiency anemia. An esophagogastroduodenoscopy revealed a cluster of isolated gastric fundal varices with high-risk stigmata. Serologic workup for cirrhosis was negative, and a FibroScan measured liver stiffness at 4.2 kilopascals. Computed tomography (CT) of his abdomen and pelvis showed non-cirrhotic portal hypertension, as well as the presence of a splenic arteriovenous (AV) fistula and splenic artery aneurysm (SAA). Resection of the fistula, SAA, and spleen completely resolved the gastric varices and anemia.

12.
Cureus ; 14(8): e27968, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-36120248

RESUMEN

Hereditary hemorrhagic telangiectasia (HHT) is a rare genetic disorder distinguished by multiple arteriovenous malformations that can affect the liver and lungs, and additionally cause high-output heart failure. Effective medical treatment for HHT-related heart failure is limited. While most types of heart failure are contraindications in liver transplants, HHT-related high-output heart failure is an indication for a liver transplant. However, this is rarely performed as it poses a higher-than-average intraoperative risk. We present a case of a 57-year-old female patient with HHT and high-output heart failure from HHT who underwent a successful orthotopic liver transplant to significantly improve her heart function. Incidentally, the patient had a concomitant diagnosis of primary biliary cholangitis (PBC) from her explanted liver. We review the literature on liver transplants related to HHT and perioperative risks associated with heart failure and pulmonary hypertension that may be associated with both HHT and PBC.

13.
Arthritis Care Res (Hoboken) ; 74(9): 1477-1483, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-33644992

RESUMEN

OBJECTIVE: Responsive assessment of disease activity in patients who have rheumatoid arthritis (RA) is necessary to evaluate therapeutic efficacy and guide treatment. We compared the utility of the multibiomarker disease activity (MBDA) score in the assessment of RA disease activity with that of the Disease Activity Score in 28 joints using the erythrocyte sedimentation rate (DAS28-ESR) score and the Clinical Disease Activity Index (CDAI) in a multicenter, randomized, placebo-controlled trial of repository corticotropin injection (RCI) in patients with persistently active RA. METHODS: Patients received 80 units of RCI twice weekly during a 12-week open-label period; those who experienced low disease activity at week 12 were randomly assigned to receive either 80 units of RCI or placebo twice weekly during a 12-week double-blind period. Changes in disease activity (measured by DAS28-ESR, CDAI, and MBDA scores) and correlations between MBDA scores and both DAS28-ESR and CDAI scores were assessed. RESULTS: Changes from baseline in DAS28-ESR and CDAI scores suggested that RCI therapy led to clinically meaningful improvements in disease activity, but improvements from baseline in MBDA scores were below the minimally important difference threshold. For the DAS28-ESR and CDAI, correlations with total MBDA and individual component scores were generally low (r ≤ 0.3) and occasionally moderate (r > 0.3 but r < 0.5). CONCLUSION: The results of the present study suggest overall MBDA scores are not sufficiently responsive for assessing RA disease activity after RCI therapy. These findings are consistent with those seen with other RA drugs and, although they are from a clinical trial, suggest the MBDA should not be a preferred disease activity measure in clinical practice.


Asunto(s)
Antirreumáticos , Artritis Reumatoide , Antirreumáticos/uso terapéutico , Artritis Reumatoide/diagnóstico , Artritis Reumatoide/tratamiento farmacológico , Biomarcadores , Sedimentación Sanguínea , Humanos , Índice de Severidad de la Enfermedad
14.
Front Psychol ; 13: 793483, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35360560

RESUMEN

Student-teacher relationships (STRs) have been examined by many studies. However, an omission still exists, the existing scales are not appropriate for studying STRs in private colleges because of the special character of these schools. This paper presents the development and validation of Private-College Student-Teacher Relationship Scale (PCSTRS), the first instrument to evaluate student-teacher relationships (STRs) in private colleges. The PCSTRS has six dimensions: trust, interaction, intimacy, care, approval, and comfort. In our main study, the validity and reliability of the six-factor PCSTRS model were demonstrated. The result of internal consistency coefficient indicated the high reliability of the scale, and the result of concurrent validity indicated the significant correlational relationships between the PCSTRS with other STR measures. In supplementary study, the PCSTRS was administered to 360 participants to confirm the applicability of PCSTRS and investigate the relation of STRs and students' traits, performance, and wellbeing, as well as the differences between the private school and the public school in this relation; the analyses revealed that there were significant differences in trust, intimacy, and care between private and public colleges; positive correlations were found between STRs and self-esteem, self-efficacy, academic performance, extracurricular activity involvement, and subjective wellbeing. Present research firstly develops the PCSTRS, examined the reliability and validity, and provides the proposed nomological network among related constructs.

15.
Sci Adv ; 8(1): eabj9513, 2022 Jan 07.
Artículo en Inglés | MEDLINE | ID: mdl-34995107

RESUMEN

We pursued the hypothesis that specific glycans can be used to distinguish breast cancer stem cells (CSCs) and influence their function. Comparison of CSCs and non-CSCs from multiple breast cancer models revealed that CSCs are distinguished by expression of α2,3 sialylated core2 O-linked glycans. We identified a lectin, SLBR-N, which binds to O-linked α2,3 sialic acids, that was able to enrich for CSCs in vitro and in vivo. This O-glycan is expressed on CD44 and promotes its interaction with hyaluronic acid, facilitating CD44 signaling and CSC properties. In contrast, FUT3, which contributes to sialyl Lewis X (sLeX) production, is preferentially expressed in the non-CSC population, and it antagonizes CSC function. Collectively, our data indicate that SLBR-N can be more efficient at enriching for CSCs than CD44 itself because its use avoids the issues of CD44 splicing and glycan status. These data also reveal how differential glycosylation influences CSC fate.

16.
Viruses ; 14(12)2022 11 29.
Artículo en Inglés | MEDLINE | ID: mdl-36560672

RESUMEN

BACKGROUND: Hepatitis B surface antigen (HBsAg) loss is associated with improved clinical outcomes for individuals with chronic hepatitis B (CHB); however, the effects of varying HBsAg levels on clinical outcomes in diverse cohorts are understudied. METHODS: In this cross-sectional, multicentre, retrospective study, the data on adult subjects enrolled in the Canadian HBV Network with CHB seen from 1 January 2012 to 30 January 2021 with the treatment and virologic data within 1 year of HBsAg testing were analyzed. Patients were tested for HBsAg using qualitative (for HBsAg-negative samples) and/or commercial quantitative assays. Fibrosis or hepatic necroinflammation was determined by the liver stiffness measurement (LSM). The baseline data were summarized using descriptive statistics and compared by using univariable/multivariable analyses. RESULTS: This study included 844 CHB patients, with a median age of 49.6 years (IQR 40.1-60.5), and 37% were female. In total, 751 patients (78.6%) had known ethnicity data, and 76.7% self-reported as Asian, 11.4% as Black, 6.8% as White, and 4.8% as other. Among the 844 patients, 237 (28.0%) were HBsAg (-) (1000 IU/mL. Overall, 80% (682) had known HBeAg status at the last follow-up, and the majority (87.0%) were HBeAg-negative. In addition, 54% (461/844) had prior antiviral therapy, 19.7% of which (16.3, 23.7, n = 91) were HBsAg (-). The treated patients had a lower risk of cirrhosis (16.46, 95% CI 1.89-143.39, p = 0.01) or HCC (8.23, 95% CI 1.01-67.39, p = 0.05) than the untreated patients. A lower proportion of the HBsAg-loss group had cirrhosis (5.7% vs. 10.9%, p = 0.021) and HCC (0.9% vs. 6.2%, p = 0.001). CONCLUSION: In this retrospective, ethnically diverse cohort study, CHB patients who received antiviral therapy and/or had HBsAg loss were less likely to develop cirrhosis and HCC, confirming the results of the studies in less diverse cohorts. No association was found between the qHBsAg level and fibrosis determined with LSM. Individuals who achieved HBsAg loss had low-level qHBsAg within 1 year of seroclearance.


Asunto(s)
Carcinoma Hepatocelular , Hepatitis B Crónica , Neoplasias Hepáticas , Adulto , Humanos , Femenino , Persona de Mediana Edad , Masculino , Antígenos de Superficie de la Hepatitis B , Virus de la Hepatitis B/genética , Estudios Retrospectivos , Antígenos e de la Hepatitis B , Antígenos de Superficie , Estudios de Cohortes , Estudios Transversales , Carcinoma Hepatocelular/tratamiento farmacológico , Canadá/epidemiología , Neoplasias Hepáticas/tratamiento farmacológico , Antivirales/uso terapéutico , Cirrosis Hepática/diagnóstico , Cirrosis Hepática/tratamiento farmacológico , Cirrosis Hepática/complicaciones , ADN Viral
17.
Neurosignals ; 19(3): 163-74, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21778691

RESUMEN

Excessive misfolded proteins and/or dysfunctional mitochondria, which may cause energy deficiency, have been implicated in the etiopathogenesis of Parkinson's disease (PD). Enhanced clearance of misfolded proteins or injured mitochondria via autophagy has been reported to have neuroprotective roles in PD models. The fact that resveratrol is a known compound with multiple beneficial effects similar to those associated with energy metabolism led us to explore whether neuroprotective effects of resveratrol are related to its role in autophagy regulation. We tested whether modulation of mammalian silent information regulator 2 (SIRT1) and/or metabolic energy sensor AMP-activated protein kinase (AMPK) are involved in autophagy induction by resveratrol, leading to neuronal survival. Our results showed that resveratrol protected against rotenone-induced apoptosis in SH-SY5Y cells and enhanced degradation of α-synucleins in α-synuclein-expressing PC12 cell lines via autophagy induction. We found that suppression of AMPK and/or SIRT1 caused decrease of protein level of LC3-II, indicating that AMPK and/or SIRT1 are required in resveratrol-mediated autophagy induction. Moreover, suppression of AMPK caused inhibition of SIRT1 activity and attenuated protective effects of resveratrol on rotenone-induced apoptosis, further suggesting that AMPK-SIRT1-autophagy pathway plays an important role in the neuroprotection by resveratrol on PD cellular models.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Antioxidantes/uso terapéutico , Autofagia/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Sirtuina 1/metabolismo , Estilbenos/uso terapéutico , Animales , Línea Celular Transformada , Relación Dosis-Respuesta a Droga , Doxiciclina/farmacología , Regulación de la Expresión Génica/efectos de los fármacos , Humanos , Insecticidas/toxicidad , Microscopía Inmunoelectrónica/métodos , Proteínas Asociadas a Microtúbulos/genética , Proteínas Asociadas a Microtúbulos/metabolismo , Mutación/genética , Poli(ADP-Ribosa) Polimerasa-1 , Poli(ADP-Ribosa) Polimerasas/metabolismo , ARN Interferente Pequeño/farmacología , Ratas , Resveratrol , Rotenona/toxicidad , Factores de Tiempo , alfa-Sinucleína/genética , alfa-Sinucleína/metabolismo
18.
Can Liver J ; 4(1): 16-22, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35991468

RESUMEN

Background: Since December 2019, there are 30 million confirmed cases of a novel coronavirus disease (COVID-19) secondary to severe acute respiratory syndrome coronavirus 2. As of 2020, hepatitis B virus (HBV) affects more than 200 million people worldwide. Both are caused by viral agents. The short-term mortality rate from COVID-19 is much higher than that of HBV. Objective: We sought to understand the impact of HBV coinfection on hospitalized patients with COVID-19. Search Methods: Searches of the literature were conducted in the PubMed, Cochrane Library, and Embase electronic databases. Selection Criteria: We included cohort studies and randomized studies with information on rates of mortality and intensive care unit (ICU) admission from individuals coinfected by HBV and COVID-19. Data Collection and Analysis: Data from six cohort studies with 2,015 patients were collected between January and April 2020, and the results were analyzed by meta-analysis. Main Results: HBV coinfection did not lead to increased mortality or ICU admission rates among individuals hospitalized for COVID-19 (risk ratio 0.79, 95% CI 0.333-1.83, N = 2,015; adjusted OR = 0.79, 95% CI 0.31-1.98). During their hospital stay, coinfected patients did not appear to have an increased hospital length of stay or risk of hepatitis B reactivation. Conclusions: This systematic review and meta-analysis provides support that HBV is not a significant risk factor for serious adverse outcomes among patients hospitalized for COVID-19 infection.

19.
Rheumatol Ther ; 8(4): 1871-1886, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34478124

RESUMEN

INTRODUCTION: We conducted post hoc analyses of biomarker results from a multicenter, randomized, double-blind, placebo-controlled study of repository corticotropin injection (RCI; Acthar® Gel) in patients with persistently active systemic lupus erythematosus (SLE) despite treatment with moderate-dose glucocorticoids. METHODS: Adults with active SLE and moderate to severe rash and/or arthritis were enrolled in the primary study. Patients had active SLE despite treatment with stable glucocorticoids, antimalarials, and nonsteroidal anti-inflammatory drugs and/or immunosuppressants. Patients were randomly assigned to 80 U of RCI or placebo subcutaneously every other day for 4 weeks and then twice weekly through week 24. Blood samples were analyzed for serum cytokines and complement proteins using enzyme-linked immunosorbent or Luminex assays and for circulating leukocytes using flow cytometry. Biomarker levels were reported as percentages of the baseline and were further evaluated in subgroups stratified by baseline SLE Disease Activity Index-2000 (SLEDAI-2K) scores (< 10 vs. ≥ 10), baseline anti-double-stranded DNA levels (< 15 IU/mL vs. ≥ 15 IU/mL), and BILAG-based Combined Lupus Assessment (BICLA) responses at week 20 and 24. RESULTS: RCI treatment resulted in reduced levels of B cell-activating factor and interleukin-6 cytokines in all subgroups compared with placebo. RCI treatment also resulted in lower levels of CD19+ B cells and CD19+IgD-CD27-CD95+ atypical activated memory B cells than did placebo in the higher baseline disease activity subgroups and in BICLA non-responders. Furthermore, RCI treatment led to greater increases in complement component (C)3 and C4 levels than did placebo in the higher baseline disease activity subgroups and in BICLA responders. CONCLUSIONS: RCI may reduce inflammation through B cell immunomodulation in patients with persistently active SLE, particularly in those with higher disease activity. TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT02953821.

20.
Rheumatol Ther ; 8(1): 573-584, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33687687

RESUMEN

INTRODUCTION: We assessed patient-reported outcomes from a multicenter, randomized, double-blind, placebo-controlled study of repository corticotropin injection (RCI; Acthar® Gel) in patients with persistently active systemic lupus erythematosus (SLE) despite treatment with moderate-dose glucocorticoids. METHODS: The trial enrolled adults with active SLE and moderate-to-severe rash and/or arthritis despite use of stable glucocorticoids (7.5 mg/day to 30 mg/day prednisone equivalent), antimalarials, and nonsteroidal anti-inflammatory drugs for ≥ 4 weeks and/or immunosuppressants for ≥ 8 weeks before screening. Patients were randomly assigned to 80 U of RCI or placebo subcutaneously every other day through week 4, then twice weekly through week 24. Primary analyses evaluated the change from baseline to week 24 in the Lupus Quality of Life (QoL) and Work Productivity and Activity Impairment (WPAI)-Lupus questionnaires. Post hoc analyses stratified results by baseline disease activity (SLE Disease Activity Index-2000 [SLEDAI-2K] < 10 or ≥ 10; Cutaneous Lupus Erythematosus Disease Area and Severity Index [CLASI]-Activity < 11 or ≥ 11; and British Isles Lupus Assessment Group [BILAG]-2004 < 20 or ≥ 20) and by BILAG-based Combined Lupus Assessment (BICLA) response at weeks 20 and 24. RESULTS: RCI treatment resulted in greater improvement in the LupusQoL pain domain at week 16 and planning domain at week 24 compared with placebo. Post hoc analyses demonstrated greater improvements with RCI in the pain, planning, and fatigue domains than with placebo at multiple time points in patients with higher disease activity by baseline SLEDAI-2K ≥ 10, CLASI-Activity ≥ 11, and BILAG-2004 ≥ 20 and/or in BICLA responders. Compared with placebo, RCI also resulted in greater improvements in percentage work time missed at week 24 in patients with baseline CLASI-Activity < 11 and in percentage impairment while working at week 16 in BICLA responders. CONCLUSIONS: RCI may improve QoL and work productivity in patients who have persistently active SLE despite treatment with standard SLE therapy. TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT02953821.

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