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1.
Int J Mol Sci ; 24(4)2023 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-36834735

RESUMEN

Atrial fibrillation (AF), the most common arrhythmia in clinical practice, is associated with an increase in mortality and morbidity due to its high potential to cause stroke and systemic thromboembolism. Inflammatory mechanisms may play a role in the pathogenesis of AF and its maintenance. We aimed to evaluate a range of inflammatory markers as potentially involved in the pathophysiology of individuals with nonvalvular AF (NVAF). A total of 105 subjects were enrolled and divided into two groups: patients with NVAF (n = 55, mean age 72 ± 8 years) and a control group of individuals in sinus rhythm (n = 50, mean age 71 ± 8 years). Inflammatory-related mediators were quantified in plasma samples by using Cytometric Bead Array and Multiplex immunoassay. Subjects with NVAF presented significantly elevated values of interleukin (IL)-2, IL-4, IL-6, IL-10, tumor necrosis factor (TNF), interferon-gamma, growth differentiation factor-15, myeloperoxidase, as well as IL-4, interferon-gamma-induced protein (IP-10), monokine induced by interferon-gamma, neutrophil gelatinase-associated lipocalin, and serum amyloid A in comparison with controls. However, after multivariate regression analysis adjusting for confounding factors, only IL-6, IL-10, TNF, and IP-10 remained significantly associated with AF. We provided a basis for the study of inflammatory markers whose association with AF has not been addressed before, such as IP-10, in addition to supporting evidence about molecules that had previously been associated with the disease. We expect to contribute to the discovery of markers that can be implemented in clinical practice hereafter.


Asunto(s)
Fibrilación Atrial , Humanos , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Interleucina-10 , Interleucina-6 , Interferón gamma , Quimiocina CXCL10 , Interleucina-4 , Factor de Necrosis Tumoral alfa
2.
Int J Mol Sci ; 21(9)2020 May 02.
Artículo en Inglés | MEDLINE | ID: mdl-32370194

RESUMEN

Atrial fibrillation (AF) is one of the most prevalent forms of arrhythmia that carries an increased risk of stroke which, in turn, is strongly associated with cognitive decline. The majority of dementia cases are caused by Alzheimer's disease (AD) with obscure pathogenesis. While the exact mechanisms are unknown, the role of inflammatory processes and infectious agents have recently been implicated in both AD and AF, suggesting a common link between these maladies. Here, we present the main shared pathways underlying arrhythmia and memory loss. The overlapping predictive biomarkers and emerging joint pharmacological approaches are also discussed.


Asunto(s)
Enfermedad de Alzheimer/fisiopatología , Fibrilación Atrial/fisiopatología , Disfunción Cognitiva/fisiopatología , Infecciones/fisiopatología , Inflamación/fisiopatología , Accidente Cerebrovascular/fisiopatología , Demencia/fisiopatología , Humanos , Modelos Biológicos , Factores de Riesgo
3.
Int J Obes (Lond) ; 43(2): 253-262, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30120429

RESUMEN

BACKGROUND/OBJECTIVES: Obesity is an important risk factor for the development of diseases such as diabetes mellitus, hypertension, and dyslipidemia; however, a small number of individuals with long-standing obesity do not present with these cardiometabolic diseases. Such individuals are referred to as metabolically healthy obese (MHO) and potentially represent a subgroup of the general population with a protective genetic predisposition to obesity-related diseases. We hypothesized that individuals who were metabolically healthy, but significantly obese (BMI ≥ 35 kg/m2) would represent a highly homogenous subgroup, with which to investigate potential genetic associations to obesity. We further hypothesized that such a cohort may lend itself well to investigate potential genotypes that are protective with respect to the development of cardiometabolic disease. SUBJECTS/METHODS: In the present study, we implemented this novel selection strategy by screening 892 individuals diagnosed as Class 2 or Class 3 obese and identified 38 who presented no manifestations of cardiometabolic disease. We then assessed these subjects for single-nucleotide polymorphisms (SNPs) that associated with this phenotype. RESULTS: Our analysis identified 89 SNPs that reach statistical significance (p < 1 × 10-5), some of which are associated with genes of biological pathways that influences dietary behavior; others are associated with genes previously linked to obesity and cardiometabolic disease as well as neuroimmune disease. This study, to the best of our knowledge, represents the first genetic screening of a cardiometabolically healthy, but significantly obese population.


Asunto(s)
Enfermedades Cardiovasculares , Síndrome Metabólico , Obesidad , Polimorfismo de Nucleótido Simple/genética , Adulto , Enfermedades Cardiovasculares/complicaciones , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/genética , Estudios de Cohortes , Femenino , Estudio de Asociación del Genoma Completo , Humanos , Síndrome Metabólico/complicaciones , Síndrome Metabólico/epidemiología , Síndrome Metabólico/genética , Obesidad/complicaciones , Obesidad/epidemiología , Obesidad/genética
4.
Dement Geriatr Cogn Disord ; 39(1-2): 25-31, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25300502

RESUMEN

In addition to hypertension, dyslipidemia, atherosclerosis, and diabetes, a sedentary lifestyle plays a pivotal role in cerebro- and cardiovascular disease and progressive cognitive decline, including vascular dementia and Alzheimer's disease. The present study investigated whether controlling the key risks and participating in physical activity have a beneficial impact on these disorders. Elderly volunteers were enrolled in a 3-month program that consisted of structured exercise three times per week. The daily routine, medical treatment, and vital parameters were evaluated and correlated with the subjects' neuropsychiatric status. High blood pressure was found in 40% of the participants, with no significant differences between the sexes. A higher proportion of females (55%) than males (18%) forgot to take their medication during the observation period. Significant negative correlations were found between Mini-Mental State Examination (MMSE) scores and age, lack of a caregiver, and increased pulse rate before or after exercise. These results suggest that the presence of home assistance and subsequent improvement in medication compliance, vital parameter optimization, and regular physical activity may yield better MMSE results and a lower risk for cerebro- and cardiovascular disease.


Asunto(s)
Antihipertensivos/uso terapéutico , Ejercicio Físico/fisiología , Hipertensión/fisiopatología , Hipertensión/terapia , Cumplimiento de la Medicación/psicología , Anciano , Envejecimiento , Estudios Transversales , Femenino , Humanos , Hipertensión/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Pulso Arterial , Medición de Riesgo , Factores de Riesgo , Conducta Sedentaria , Encuestas y Cuestionarios , Resultado del Tratamiento
5.
J Nerv Ment Dis ; 203(10): 781-5, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26348587

RESUMEN

Chronic disorders such as hypertension and diabetes mellitus are often associated with depressive and anxiety symptoms, as well as cognitive decline. Once developed, psychological support is essential for improving the quality of life. This study is aimed at identifying impaired mental health in connection with these systemic metabolic disorders. A total of 34 patients were included in this cross-sectional study: 17 hypertensive individuals with a mean age of 59 ± 10 years, and 17 diabetic patients aged 54 ± 10 years. The following psychometric tests were used: Mini-Mental State Examination (MMSE), Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), and self-reporting questionnaire (SRQ-20). A large number of patients with high blood pressure or diabetes was associated with mental health problems (82% or 65%, respectively; p = 0.246). Affective disorder, especially moderate to severe depression, was seen mainly in diabetic patients (76%), whereas hypertensive individuals had higher prevalence of anxiety (64%). There was no cognitive impairment in this middle-aged population. This study shows a high proportion of depression and anxiety symptoms in patients with hypertension or diabetes mellitus, reinforcing the importance of psychiatric support for appropriate control of these metabolic disorders.


Asunto(s)
Diabetes Mellitus/psicología , Hipertensión/psicología , Ansiedad/epidemiología , Ansiedad/etiología , Trastornos del Conocimiento/epidemiología , Trastornos del Conocimiento/etiología , Estudios Transversales , Depresión/epidemiología , Depresión/etiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Escalas de Valoración Psiquiátrica
6.
Cell Physiol Biochem ; 34(6): 2200-8, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25562166

RESUMEN

BACKGROUND: Circulating auto-reactive antibodies are hallmark features of auto-immune diseases, however little is known with respect to the specificity of such bio-markers. In the present study, we investigated the specificity of anti-nucleic acid antibodies in the blood of subjects with systemic lupus erythematosus (SLE) and healthy controls. METHODS: Sera from 12 SLE cases and 8 controls were evaluated for immuno-reactivity to purified RNA, DNA and mitochondrial DNA (mtDNA) by enzyme-linked immuno-sorbent assay (ELISA). RESULTS: As expected, immuno-reactivity to total nucleic acids was significantly higher in subjects with SLE when compared to healthy controls, however a clear distinction was observed among the various nucleic acid sub-types, with sera from SLE subjects displaying the greatest immuno-reactivity to RNA followed by mtDNA and then total DNA. CONCLUSION: The identification of auto-reactive antibodies can serve as highly sensitive biomarkers, although their specificity may not always allow diagnostic certainty. The knowledge that auto-antibodies in subjects with SLE display differential immuno-reactivity may help to improve existing diagnostics and may lead to a better understanding of the pathogenesis of auto-immune disorders.


Asunto(s)
ADN Mitocondrial/inmunología , ADN/inmunología , Lupus Eritematoso Sistémico/inmunología , ARN/inmunología , Adolescente , Adulto , Ensayo de Inmunoadsorción Enzimática , Femenino , Genoma Humano/inmunología , Células HEK293 , Humanos , Lupus Eritematoso Sistémico/patología , Masculino , Mitocondrias/inmunología
7.
Biochem Biophys Res Commun ; 451(4): 503-9, 2014 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-25124662

RESUMEN

Gene and cell-based therapies comprise innovative aspects of regenerative medicine. Even though stem cells represent a highly potential therapeutic strategy, their wide-spread exploitation is marred by ethical concerns, potential for malignant transformation and a plethora of other technical issues, largely restricting their use to experimental studies. Utilizing genetically modified human umbilical cord blood mono-nuclear cells (hUCB-MCs), this communication reports enhanced differentiation of transplants in a mouse model of amyotrophic lateral sclerosis (ALS). Over-expressing Oct4 and Sox2 induced production of neural marker PGP9.5, as well as transformation of hUCB-MCs into micro-glial and endothelial lines in ALS spinal cords. In addition to producing new nerve cells, providing degenerated areas with trophic factors and neo-vascularisation might prevent and even reverse progressive loss of moto-neurons and skeletal muscle paralysis.


Asunto(s)
Sangre Fetal/citología , Factor 3 de Transcripción de Unión a Octámeros/biosíntesis , Factores de Transcripción SOXB1/biosíntesis , Esclerosis Amiotrófica Lateral/genética , Animales , Desdiferenciación Celular , Diferenciación Celular , Modelos Animales de Enfermedad , Humanos , Ratones , Células Madre Pluripotentes/metabolismo , Medicina Regenerativa , Transfección
8.
Mov Disord ; 29(4): 527-31, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24301904

RESUMEN

Inflammatory mechanisms have been implicated in a series of neuropsychiatric conditions, including behavioral disturbances, cognitive dysfunction, and affective disorders. Accumulating evidence also strongly suggests their involvement in the pathophysiology of Parkinson's disease (PD). This study aimed to evaluate plasma levels of inflammatory biomarkers, and their association with cognitive performance and other non-motor symptoms of PD. PD patients and control individuals were subjected to various psychometric tests, including the Mini-Mental State Examination (MMSE), Frontal Assessment Battery (FAB), and Beck's Depression Inventory (BDI). Biomarker plasma levels were measured by enzyme-linked immunosorbent assay (ELISA). PD patients exhibited worse performance on MMSE and the programming task of FAB, and presented higher soluble tumor necrosis factor receptor (sTNFR) plasma levels than control individuals. Among PD patients, increased sTNFR1 and sTNFR2 concentrations were associated with poorer cognitive test scores. After multiple linear regression, sTNFR1 and education remained a significant predictor for FAB scores. Our data suggest that PD is associated with a proinflammatory profile, and sTNFRs are putative biomarkers of cognitive performance, with elevated sTNFR1 levels predicting poorer executive functioning in PD patients.


Asunto(s)
Trastornos del Conocimiento/diagnóstico , Cognición/fisiología , Enfermedad de Parkinson/sangre , Enfermedad de Parkinson/psicología , Receptores del Factor de Necrosis Tumoral/sangre , Anciano , Biomarcadores/sangre , Trastornos del Conocimiento/sangre , Trastornos del Conocimiento/complicaciones , Función Ejecutiva/fisiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Enfermedad de Parkinson/complicaciones
9.
Brain Behav Immun ; 32: 122-30, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-23517709

RESUMEN

Bone-marrow-derived mesenchymal stem cells (MSCs) demonstrate neuro-protective effects in several disease models. By producing growth-factors, cytokines and chemokines, they promote survival of neurons in damaged brain areas. Alternative MSC sources, such as human tooth germ stem cells (hTGSCs), have been investigated for their neuro-protective properties. They ameliorate effects of neuro-toxic agents by paracrine mechanisms, however these secreted bio-active molecules are not yet characterized. Therefore, the current study aimed to provide a detailed analysis of the secretome of hTGSCs. Brain cells were exposed to various toxic materials, including Alzheimer's ß-amyloid peptide (ß-AP) and 6-hydroxy-dopamine (6-OHDA). When co-cultured with hTGSCs, the activity of a number of anti-oxidant enzymes (catalase, glutathione-s-transferase, glutathione-peroxidase, superoxide-dismutase) was increased and neuronal death/apoptosis was subsequently reduced. The composition of the secreted bio-active materials is influenced by various pre-existing factors such as oxygen and glucose deprivation and the age of cells (passage number). This report reveals for the first time that the neuro-protective secretome of hTGSCs and the micro-environment of cells have a mutual and dynamic impact on one another.


Asunto(s)
Ambiente , Células Madre/fisiología , Germen Dentario/fisiología , Adolescente , Enfermedad de Alzheimer/metabolismo , Enfermedad de Alzheimer/patología , Proteínas Reguladoras de la Apoptosis/fisiología , Línea Celular Tumoral , Supervivencia Celular/fisiología , Quimiocinas/metabolismo , Niño , Citocinas/metabolismo , Femenino , Citometría de Flujo , Humanos , Inmunohistoquímica , Péptidos y Proteínas de Señalización Intercelular/metabolismo , Masculino , Tercer Molar/fisiología , Neovascularización Fisiológica/fisiología , Enfermedades del Sistema Nervioso/etiología , Enfermedades del Sistema Nervioso/metabolismo , Enfermedades del Sistema Nervioso/patología , Fármacos Neuroprotectores/metabolismo , Neurotoxinas/antagonistas & inhibidores , Neurotoxinas/toxicidad , Enfermedad de Parkinson/metabolismo , Enfermedad de Parkinson/patología , Reacción en Cadena en Tiempo Real de la Polimerasa , Células Madre/metabolismo , Germen Dentario/metabolismo
10.
Mol Cell Neurosci ; 49(1): 77-84, 2012 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21971579

RESUMEN

OBJECTIVES: Among several other factors, the neuro-toxic ß-amyloid peptide (ßAP)-induced inflammatory mechanisms have also been implicated in the pathogenesis of Alzheimer's dementia (AD). Cytokines have recently emerged as prime candidates underlying this immune reaction. The purpose of this study was to evaluate the inflammatory response of peripheral blood mono-nuclear cells (PBMC) in AD. DESIGN: Cross-sectional (observational) study. SETTING: Behavioral and cognitive neurology clinic of the Universidade Federal de Minas Gerais in Belo Horizonte, Brazil. PARTICIPANTS: AD patients (n=19), healthy elderly (n=19) and young (n=14) individuals. MEASUREMENTS: Cytokine levels were assessed by enzyme-linked immuno-sorbent assay (ELISA) after exposing cells to a broad range of ßAP concentrations (10(-4)-10(-10)M) as a stimulus. AD samples were weighed against leukocytes harvested from non-demented young and elderly subjects. RESULTS: Cytokine production of PBMCs in the youth was characterized by low baseline levels when compared to cells from the older generation. In the aging population, AD cells were distinguished from the healthy elderly sub-group by an even higher basal cytokine secretion. The low resting concentration in young individuals was markedly increased after treatment with ßAP, however cells from the elderly, irrespective of their disease status, showed unchanged cytokine release following ßAP administration. Non-specific activation of PBMCs with anti-CD3/CD28 antibodies resulted in elevated interleukin (IL)-1ß concentrations in AD. CONCLUSIONS: These results demonstrate a general over-production of cytokines and resistance to ßAP in the old comparison group, with a more pronounced disruption/boosted pattern in AD. Our findings are in line with the hypothesis of "inflammaging", i.e. an enhanced inflammatory profile with normal aging and a further perturbed environment in AD. The observed cytokine profiles may serve as diagnostic biomarkers in dementia.


Asunto(s)
Enfermedad de Alzheimer/inmunología , Péptidos beta-Amiloides/farmacología , Citocinas/biosíntesis , Leucocitos Mononucleares/inmunología , Adulto , Anciano , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Inflamación/inmunología , Masculino , Persona de Mediana Edad
11.
Curr Neuropharmacol ; 21(2): 202-212, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-35339182

RESUMEN

Alzheimer's disease (AD), the most prevalent form of dementia, is a complex clinical condition with multifactorial origin posing a major burden to health care systems across the world. Even though the pathophysiological mechanisms underlying the disease are still unclear, both central and peripheral inflammation has been implicated in the process. Piling evidence shows that the nucleotide-binding domain, leucine-rich repeat and pyrin domain-containing protein 3 (NLRP3) inflammasome is activated in AD. As dyslipidemia is a risk factor for dementia, and cholesterol can also activate the inflammasome, a possible link between lipid levels and the NLRP3 inflammasome has been proposed in Alzheimer's. It is also speculated that not only cholesterol but also its metabolites, the oxysterols, may be involved in AD pathology. In this context, mounting data suggest that NLRP3 inflammasome activity can be modulated by different peripheral nuclear receptors, including liver-X receptors, which present oxysterols as endogenous ligands. In light of this, the current review explores whether the activation of NLRP3 by nuclear receptors, mediated by oxysterols, may also be involved in AD and could serve as a potential pharmacological avenue in dementia.


Asunto(s)
Enfermedad de Alzheimer , Oxiesteroles , Humanos , Inflamasomas/metabolismo , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Inflamación/tratamiento farmacológico
12.
Metabolites ; 14(1)2023 Dec 29.
Artículo en Inglés | MEDLINE | ID: mdl-38248828

RESUMEN

Given the remarkable progress in global health and overall quality of life, the significant rise in life expectancy has become intertwined with the surging occurrence of neurodegenerative disorders (NDs). This emerging trend is poised to pose a substantial challenge to the fields of medicine and public health in the years ahead. In this context, Alzheimer's disease (AD) is regarded as an ND that causes recent memory loss, motor impairment and cognitive deficits. AD is the most common cause of dementia in the elderly and its development is linked to multifactorial interactions between the environment, genetics, aging and lifestyle. The pathological hallmarks in AD are the accumulation of ß-amyloid peptide (Aß), the hyperphosphorylation of tau protein, neurotoxic events and impaired glucose metabolism. Due to pharmacological limitations and in view of the prevailing glycemic hypometabolism, the ketogenic diet (KD) emerges as a promising non-pharmacological possibility for managing AD, an approach that has already demonstrated efficacy in addressing other disorders, notably epilepsy. The KD consists of a food regimen in which carbohydrate intake is discouraged at the expense of increased lipid consumption, inducing metabolic ketosis whereby the main source of energy becomes ketone bodies instead of glucose. Thus, under these dietary conditions, neuronal death via lack of energy would be decreased, inasmuch as the metabolism of lipids is not impaired in AD. In this way, the clinical picture of patients with AD would potentially improve via the slowing down of symptoms and delaying of the progression of the disease. Hence, this review aims to explore the rationale behind utilizing the KD in AD treatment while emphasizing the metabolic interplay between the KD and the improvement of AD indicators, drawing insights from both preclinical and clinical investigations. Via a comprehensive examination of the studies detailed in this review, it is evident that the KD emerges as a promising alternative for managing AD. Moreover, its efficacy is notably enhanced when dietary composition is modified, thereby opening up innovative avenues for decreasing the progression of AD.

13.
Biomedicines ; 11(7)2023 Jul 18.
Artículo en Inglés | MEDLINE | ID: mdl-37509661

RESUMEN

The biosafety of gene therapy remains a crucial issue for both the direct and cell-mediated delivery of recombinant cDNA encoding biologically active molecules for the pathogenetic correction of congenital or acquired disorders. The diversity of vector systems and cell carriers for the delivery of therapeutic genes revealed the difficulty of developing and implementing a safe and effective drug containing artificial genetic material for the treatment of human diseases in practical medicine. Therefore, in this study we assessed changes in the transcriptome and secretome of umbilical cord blood mononuclear cells (UCB-MCs) genetically modified using adenoviral vector (Ad5) carrying cDNA encoding human vascular endothelial growth factor (VEGF165) or reporter green fluorescent protein (GFP). A preliminary analysis of UCB-MCs transduced with Ad5-VEGF165 and Ad5-GFP with MOI of 10 showed efficient transgene expression in gene-modified UCB-MCs at mRNA and protein levels. The whole transcriptome sequencing of native UCB-MCs, UCB-MC+Ad5-VEGF165, and UCB-MC+Ad5-GFP demonstrated individual sample variability rather than the effect of Ad5 or the expression of recombinant vegf165 on UCB-MC transcriptomes. A multiplex secretome analysis indicated that neither the transduction of UCB-MCs with Ad5-GFP nor with Ad5-VEGF165 affects the secretion of the studied cytokines, chemokines, and growth factors by gene-modified cells. Here, we show that UCB-MCs transduced with Ad5 carrying cDNA encoding human VEGF165 efficiently express transgenes and preserve transcriptome and secretome patterns. This data demonstrates the biosafety of using UCB-MCs as cell carriers of therapeutic genes.

14.
Ann Neurol ; 69(1): 47-64, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21280075

RESUMEN

OBJECTIVE: Sorting mechanisms that cause the amyloid precursor protein (APP) and the ß-secretases and γ-secretases to colocalize in the same compartment play an important role in the regulation of Aß production in Alzheimer's disease (AD). We and others have reported that genetic variants in the Sortilin-related receptor (SORL1) increased the risk of AD, that SORL1 is involved in trafficking of APP, and that underexpression of SORL1 leads to overproduction of Aß. Here we explored the role of one of its homologs, the sortilin-related VPS10 domain containing receptor 1 (SORCS1), in AD. METHODS: We analyzed the genetic associations between AD and 16 SORCS1-single nucleotide polymorphisms (SNPs) in 6 independent data sets (2,809 cases and 3,482 controls). In addition, we compared SorCS1 expression levels of affected and unaffected brain regions in AD and control brains in microarray gene expression and real-time polymerase chain reaction (RT-PCR) sets, explored the effects of significant SORCS1-SNPs on SorCS1 brain expression levels, and explored the effect of suppression and overexpression of the common SorCS1 isoforms on APP processing and Aß generation. RESULTS: Inherited variants in SORCS1 were associated with AD in all datasets (0.001 < p < 0.049). In addition, SorCS1 influenced APP processing. While overexpression of SorCS1 reduced γ-secretase activity and Aß levels, the suppression of SorCS1 increased γ-secretase processing of APP and the levels of Aß. INTERPRETATIONS: These data suggest that inherited or acquired changes in SORCS1 expression or function may play a role in the pathogenesis of AD.


Asunto(s)
Enfermedad de Alzheimer/etiología , Enfermedad de Alzheimer/genética , Variación Genética/genética , Receptores de Superficie Celular/genética , Receptores de Superficie Celular/fisiología , Enfermedad de Alzheimer/fisiopatología , Secretasas de la Proteína Precursora del Amiloide/genética , Secretasas de la Proteína Precursora del Amiloide/metabolismo , Precursor de Proteína beta-Amiloide/metabolismo , Encéfalo/metabolismo , Expresión Génica/genética , Expresión Génica/fisiología , Predisposición Genética a la Enfermedad/genética , Genotipo , Humanos , Proteínas Relacionadas con Receptor de LDL/genética , Proteínas de Transporte de Membrana/genética , Metaanálisis como Asunto , Mutación/genética , Polimorfismo de Nucleótido Simple/genética , Polimorfismo de Nucleótido Simple/fisiología , Factores de Riesgo , Población Blanca/genética
15.
Neurochem Res ; 36(12): 2227-35, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21785835

RESUMEN

Stem cells are considered to be promising therapeutic options in many neuro-degenerative diseases and injuries to the central nervous system, including brain ischemia and spinal cord trauma. Apart from the gold standard embryonic and mesenchymal origin, human tooth germ stem cells (hTGSCs) have also been shown to enjoy the characteristics of mesenchymal stem cells (MSCs) and the ability to differentiate into adipo-, chondro-, osteo- and neuro-genic cells, suggesting that they might serve as potential alternatives in the cellular therapy of various maladies. Immortalization of stem cells may be useful to avoid senescence of stem cells and to increase their proliferation potential without altering their natural characteristics. This study evaluated the expression of stem cell markers, surface antigens, differentiation capacity, and karyotype of hTGSCs that have been immortalized by human telomerase reverse transcriptase (hTERT) or simian vacuolating virus 40 (SV40) large T antigen. These undying cells were also evaluated for their neuro-protective potential using an in vitro SH-SY5Y neuro-blastoma model treated with hydrogen-peroxide or doxo-rubicin. Although hTGSC-SV40 showed abnormal karyotypes, our results suggest that hTGSC-hTERT preserve their MSC characteristics, differentiation capacity and normal karyotype, and they also possess high proliferation rate and neuro-protective effects even at great passage numbers. These peculiars indicate that hTGSC-hTERT could be used as a viable model for studying adipo-, osteo-, odonto- and neuro-genesis, as well as neuro-protection of MSCs, which may serve as a springboard for potentially utilizing dental waste material in cellular therapy.


Asunto(s)
Antígenos Transformadores de Poliomavirus/farmacología , Diferenciación Celular/fisiología , Células Madre Mesenquimatosas/fisiología , Fármacos Neuroprotectores/farmacología , Telomerasa/farmacología , Germen Dentario/citología , Adolescente , Humanos , Cariotipo , Células Madre/citología , Células Madre/efectos de los fármacos , Células Madre/virología
16.
Muscle Nerve ; 43(6): 872-7, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21488058

RESUMEN

INTRODUCTION: Alzheimer's ß-amyloid peptide (ßAP) is known to possess a wide range of toxic effects on neurons in vitro and in vivo; however, there is little information available regarding its impact on other excitable tissues such as skeletal muscles, which, apart from brain cells, are thought to also be targets of ßAP. METHODS: Utilizing the combination of electrophysiology and myography, we investigated whether ßAP also impairs the functioning of myocytes in frogs and mice. RESULTS: Although application of ßAP in the range of 10(-6) to 10(-8) M induced depolarization of muscle fibers in both species, it impaired contractility in frogs but not in mice, by reducing endplate potential amplitude and increasing the threshold potential. CONCLUSIONS: Unchanged contractility in the mouse in the presence of ßAP is due to a higher safety factor of neuromuscular transmission in mammals compared with amphibians. Possible clinical implications are discussed.


Asunto(s)
Péptidos beta-Amiloides/toxicidad , Encéfalo/fisiopatología , Fibras Musculares Esqueléticas/fisiología , Músculo Esquelético/fisiopatología , Fragmentos de Péptidos/toxicidad , Péptidos beta-Amiloides/fisiología , Animales , Encéfalo/metabolismo , Encéfalo/patología , Diafragma/metabolismo , Diafragma/fisiopatología , Electromiografía/métodos , Ratones , Fibras Musculares Esqueléticas/metabolismo , Fibras Musculares Esqueléticas/patología , Músculo Esquelético/metabolismo , Neuronas/metabolismo , Neuronas/patología , Neuronas/fisiología , Fragmentos de Péptidos/fisiología , Rana ridibunda , Especificidad de la Especie
17.
Front Neurosci ; 15: 631311, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33642987

RESUMEN

Obesity is a multifactorial disease, which in turn contributes to the onset of comorbidities, such as diabetes and atherosclerosis. Moreover, there are only few options available for treating obesity, and most current pharmacotherapy causes severe adverse effects, while offering minimal weight loss. Literature shows that metabotropic glutamate receptor 5 (mGluR5) modulates central reward pathways. Herein, we evaluated the effect of VU0409106, a negative allosteric modulator (NAM) of mGluR5 in regulating feeding and obesity parameters. Diet-induced obese C57BL/6 mice were treated for 14 days with VU0409106, and food intake, body weight, inflammatory/hormonal levels, and behavioral tests were performed. Our data suggest reduction of feeding, body weight, and adipose tissue inflammation in mice treated with high-fat diet (HFD) after chronic treatment with VU0409106. Furthermore, a negative modulation of mGluR5 also reduces binge-like eating, the most common type of eating disorder. Altogether, our results pointed out mGluR5 as a potential target for treating obesity, as well as related disorders.

18.
Pharmacol Rep ; 73(6): 1680-1693, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34218397

RESUMEN

BACKGROUND: Major depressive disorder (MDD) affects millions of people worldwide. While the exact pathogenesis is yet to be elucidated, the role of neuro-immune signaling has recently emerged. Despite major advances in pharmacotherapy, antidepressant use is marred by limited efficacy and potential side effects. Cannabidiol (CBD), a phytocannabinoid, exerts antidepressant-like effects in experimental animals. This study investigated the impact of CBD on sickness behavior (SB), a measure of depressive-like response, and neuro-immune changes induced by lipopolysaccharides (LPS) in mice. METHODS: Socially isolated rodents were administered with LPS to trigger SB. and treated with CBD or its vehicle. Animals were submitted to forced swimming test, to evaluate depressive-like behavior, and to open field test, to evaluate locomotory activity. Immediately after behavioral analyses, animals were euthanized and had their hypothalamus, prefrontal cortex and hippocampus dissected, to proceed neurotrophins and cytokines analyses. ELISA was used to detect IL-1ß, BDNF and NGF; and cytometric beads array to measure IL-2, IL-4, IL-6, IFN-γ, TNF-α and IL-10 levels. RESULTS: CBD effectively prevented SB-induced changes in the forced swim test without altering spontaneous locomotion. This phytocannabinoid also partially reversed LPS-evoked IL-6 increase in both the hypothalamus and hippocampus. In addition, CBD prevented endotoxin-induced increase in BDNF and NGF levels in the hippocampus of SB animals. CONCLUSIONS: Apparently, CBD prevents both behavioral and neuro-immunological changes associated with LPS-induced SB, which reinforces its potential use as an antidepressant which modulates neuroinflammation. This opens up potentially new therapeutic avenues in MDD.


Asunto(s)
Encéfalo/efectos de los fármacos , Cannabidiol/farmacología , Trastorno Depresivo Mayor/tratamiento farmacológico , Conducta de Enfermedad/efectos de los fármacos , Animales , Antidepresivos/farmacología , Conducta Animal/efectos de los fármacos , Encéfalo/metabolismo , Factor Neurotrófico Derivado del Encéfalo/metabolismo , Citocinas/metabolismo , Trastorno Depresivo Mayor/fisiopatología , Modelos Animales de Enfermedad , Lipopolisacáridos , Masculino , Ratones , Ratones Endogámicos C57BL , Factor de Crecimiento Nervioso/metabolismo , Enfermedades Neuroinflamatorias/tratamiento farmacológico , Enfermedades Neuroinflamatorias/fisiopatología
19.
Neurodegener Dis ; 7(4): 272-8, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20502038

RESUMEN

Protein aggregation and amyloid fibril deposits in the central nervous system are characteristic features of more than 2 dozens of pathologic conditions. The various peptides thought to underlie these disorders have striking structural and functional similarities. The main difference between them at the molecular level is whether they are endogenously produced particles, exogenously transmitted infectious agents, or both. These similarities and novel approaches to their transmissibility are discussed in this review-based hypothesis.


Asunto(s)
Enfermedad de Alzheimer/etiología , Enfermedades Transmisibles/etiología , Enfermedad de Alzheimer/microbiología , Enfermedad de Alzheimer/patología , Enfermedad de Alzheimer/virología , Animales , Enfermedades Transmisibles/microbiología , Enfermedades Transmisibles/patología , Enfermedades Transmisibles/virología , Humanos
20.
Curr Alzheimer Res ; 17(4): 365-372, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32442085

RESUMEN

BACKGROUND: Sedentary life-style is a significant public health issue. It increases the incidence of type-2 diabetes mellitus (DM2) and systemic arterial hypertension (SAH), which in turn may impair physical and mental health. In fact, disrupted glucose metabolism is characteristic of Alzheimer's dementia, and it is often dubbed as type-3 diabetes. OBJECTIVE: The purpose of this study was to assess the level of activity, body composition, cardiovascular risk and cognitive profile of patients with DM2 and/or SAH. The study was cross-sectional design. METHOD: The sample consisted of 120 individuals which 35% men and 65% women, with an average of 64±9 years old and 60±11 years old, respectively. Various parameters were evaluated such as anthropometric variables, pedometer recordings and brief cognitive screening battery (BCSB), which assesses the immediate memory, verbal fluency, learning, late memory and recognition. Chi-square and Fisher's exact test were applied to observe possible differences between men and women. In addition to Kruskall-Wallis, in the comparison between patients with SAH; DM2 and SAH + DM2. RESULTS: A high rate of physical inactivity was found among those enrolled in this project. Females were characterized by increased body fat, whereas men displayed visceral fat excess. BCSB demonstrated reduced verbal fluency, late memory and recognition, with women presenting significantly worse results. CONCLUSION: Low level of daily physical activity is apparently correlated with obesity, elevated cardiovascular risk, and cognitive dysfunction.


Asunto(s)
Enfermedades Cardiovasculares/fisiopatología , Disfunción Cognitiva/fisiopatología , Ejercicio Físico/fisiología , Ejercicio Físico/psicología , Factores de Riesgo de Enfermedad Cardiaca , Conducta Sedentaria , Anciano , Antropometría/métodos , Enfermedades Cardiovasculares/diagnóstico , Enfermedades Cardiovasculares/psicología , Disfunción Cognitiva/diagnóstico , Disfunción Cognitiva/psicología , Estudios Transversales , Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/fisiopatología , Diabetes Mellitus Tipo 2/psicología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Riesgo
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