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1.
Rev Cardiovasc Med ; 23(8): 267, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39076648

RESUMO

Thalassemia major is the most common monogenetic disorder worldwide, manifested as chronic hemolytic anemia. This condition leads to the need for chronic blood transfusion to be monitored for an iron overload that may be stored in several tissues and organs, including cardiomyocytes, that might cause a broad spectrum of cardiac iron toxicities such as heart failure conduction delays, myocarditis, and arrhythmias. Non-invasive imaging modalities have their benefits and limitations. Each modality complements and generates a comprehensive diagnostic and monitoring of cardiac siderosis in thalassemia major patients.

2.
Cardiol Young ; 32(12): 1984-1988, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35067256

RESUMO

INTRODUCTION: Ventricular septal defect is the most common CHD, leading to pulmonary hypertension. Significantly lower 25-hydroxyvitamin D level was reported in children with CHD compared with healthy controls. The current study aimed to investigate the correlation between 25-hydroxyvitamin D level and pulmonary hypertension in children with ventricular septal defect. METHODS: A cross-sectional study was conducted on ventricular septal defect paediatric patients from January to June, 2019. Serum 25-hydroxyvitamin D was measured using electrochemiluminescence. Pulmonary hypertension was defined as mean pulmonary artery systolic pressure > 20 mmHg for children >3 months of age at sea level, measured by Doppler echocardiography. RESULTS: From forty-four subjects, the majority of the subjects were female (56.8%) with normal nutritional status and perimembranous ventricular septal defect. Bivariate analysis showed that 25-hydroxyvitamin D level was associated with pulmonary hypertension (p < 0.01), type and size of ventricular septal defect (p = 0.02), and heart failure (p < 0.01). Higher 25-hydroxyvitamin D level was correlated with better nutritional status (p = 0.04, r = 0.26), and lower 25-hydroxyvitamin D level was correlated with the occurence of perimembranous ventricular septal defect (p = 0.01, r = -0.39), larger defect size (p < 0.01, r = -0.70), history of pneumonia (p = 0.02, r = -0.31), and heart failure (p < 0.01, r = -0.64). Subjects with 25-hydroxyvitamin D deficiency had prevalence ratio of 24.0 times for pulmonary hypertension. Higher pulmonary artery pressure was correlated to the occurence perimembranous ventricular septal defect (p = 0.01, r = 0.47), larger defect size (p < 0.01, r = 0.78), history of pneumonia (p = 0.01, r = 0.38), and heart failure (p < 0.01, r = 0.75). CONCLUSION: Children with ventricular septal defect who had low 25-hydroxyvitamin D level posed a higher risk of having pulmonary hypertension.


Assuntos
Insuficiência Cardíaca , Comunicação Interventricular , Hipertensão Pulmonar , Criança , Humanos , Feminino , Masculino , Hipertensão Pulmonar/etiologia , Hipertensão Pulmonar/complicações , Estudos Transversais , Comunicação Interventricular/complicações , Comunicação Interventricular/epidemiologia , Vitamina D
3.
Hemoglobin ; 46(1): 15-19, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35950589

RESUMO

Acknowledging and understanding the extent of thalassemia and hemoglobinopathy issues in a country is crucial for the benefit of implementing a national preventive and control program to reduce its prevalence. In order to obtain reliable prevalence data, the gene frequencies of the thalassemias and other hemoglobinopathies should be investigated. Molecular studies on thalassemia have yet to be done for Brunei's population. It was estimated that carriers of thalassemia or hemoglobinopathies in Brunei is approximately 5.0% or less of the overall population. There are about 200 current cases of thalassemia and other hemoglobinopathies including adults and children reported across all four districts of Brunei. Blood parameter analysis, microscopy, hemoglobin (Hb) electrophoresis and high performance liquid chromatography (HPLC) are the most common methods of investigation in aiding diagnosis in the hospital laboratory. Genotyping analysis conducted in an overseas laboratory has been employed to confirm some diagnosis. Compiled data from 2009-2017 at the Hematology Laboratory of the Raja Isteri Pengiran Anak Saleha Hospital, Jalan Putera Al-Muhtadee Billah, Bandar Seri Begawan, Brunei Darussalam, showed that the most reported diagnoses are α-thalassemia (α-thal) trait, ß-thalassemia (ß-thal) trait, heterozygous Hb E (HBB: c.79G>A)/ß-thal, ß-thal major (ß-TM) and ß-thal intermedia (ß-TI). The data reported indicate the importance of establishing a thalassemia registry with relevant data on patients and patient outcomes as a tool for monitoring and improving patient care.


Assuntos
Hemoglobinopatias , Talassemia alfa , Talassemia beta , Adulto , Brunei , Criança , Hemoglobinopatias/genética , Heterozigoto , Humanos , Talassemia alfa/diagnóstico , Talassemia alfa/epidemiologia , Talassemia alfa/genética , Talassemia beta/genética
4.
J Environ Manage ; 209: 273-285, 2018 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-29306144

RESUMO

We propose the novel integrated modelling procedure 3H-EMC for the determination of the environmental flow in rivers and streams; 3H-EMC combines Hydrological, Hydrodynamic and Habitat modelling with the use of the Environmental Management Classes (EMCs) that are defined by the Global Environmental Flow Calculator. We apply 3H-EMC in the Sperchios River in Central Greece, in which water abstractions for irrigation cause significant environmental impacts. Calculations of the hydrodynamic-habitat model, in which the large and the small chub are the main fish species, suggest discharge values that range from 1.0 m3/s to 4.0 m3/s. However, hydrological modelling indicates that it is practically difficult to achieve discharges that are higher than approximately 1.0-1.5 m3/s. Furthermore, legislation suggests significantly lower values (0.4-0.5 m3/s) that are unacceptable from the ecological point of view. This behaviour shows that a non-integrated approach, which is based only on hydrodynamic-habitat modelling does not necessarily result in realistic environmental flows, and thus an integrated approach is required. We propose the value of 1.0 m3/s as the "optimum" environmental flow for Sperchios River, because (a) it satisfies the habitat requirements, as expressed by the values of weighted useable area that are equal to 2180 and 1964 m2 for the large and small chub, respectively, and correspond to 82 and 95% of their respective maximum values, (b) it is consistent with the requirements of Environmental Classes A and B, whose percentiles are higher than 75% for discharge (77.2%) and for habitat availability (>83.5% for the large chub and >85.0% for the small chub), (c) it is practically achievable from the hydrological point of view, and (d) it is higher than the value proposed by the Greek legislation. The proposed modelling approach can be applied to any river or stream using the same or similar modelling tools, which should be linked via suitable coupling algorithms.


Assuntos
Ecossistema , Hidrodinâmica , Rios , Animais , Monitoramento Ambiental , Grécia , Hidrologia , Modelos Teóricos
5.
Mol Psychiatry ; 19(7): 784-90, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23999528

RESUMO

Autism is a severe neurodevelopmental disorder, the aetiology of which remains mainly unknown. Family and twin studies provide strong evidence that genetic factors have a major role in the aetiology of this disease. Recently, whole exome sequencing (WES) efforts have focused mainly on rare de novo variants in singleton families. Although these studies have provided pioneering insights, de novo variants probably explain only a small proportion of the autism risk variance. In this study, we performed exome sequencing of 10 autism multiplex families with the aim of investigating the role of rare variants that are coinherited in the affected sibs. The pool of variants selected in our study is enriched with genes involved in neuronal functions or previously reported in psychiatric disorders, as shown by Gene Ontology analysis and by browsing the Neurocarta database. Our data suggest that rare truncating heterozygous variants have a predominant role in the aetiology of autism. Using a multiple linear regression model, we found that the burden of truncating mutations correlates with a lower non-verbal intelligence quotient (NVIQ). Also, the number of truncating mutations that were transmitted to the affected sibs was significantly higher (twofold) than those not transmitted. Protein-protein interaction analysis performed with our list of mutated genes revealed that the postsynaptic YWHAZ is the most interconnected node of the network. Among the genes found disrupted in our study, there is evidence suggesting that YWHAZ and also the X-linked DRP2 may be considered as novel autism candidate genes.


Assuntos
Proteínas 14-3-3/genética , Transtorno Autístico/genética , Exoma/genética , Predisposição Genética para Doença/genética , Heterozigoto , Peptídeos e Proteínas de Sinalização Intercelular/genética , Mutação/genética , Proteínas do Tecido Nervoso/genética , Criança , Pré-Escolar , Bases de Dados Genéticas , Feminino , Humanos , Inteligência/genética , Masculino , Mapas de Interação de Proteínas/genética , Adulto Jovem
6.
J Food Sci Technol ; 49(3): 373-7, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23729859

RESUMO

The effects of different cooking methods (boiling, baking, frying and grilling) on proximate and mineral composition of snakehead fish were investigated. The mean content of moisture, protein, fat and ash of raw fish was found to be 77.2 ± 2.39, 13.9 ± 2.89, 5.9 ± 0.45 and 0.77 ± 0.12% respectively. The changes in the amount of protein and fat were found to be significantly higher in frying and grilling fish. The ash content increased significantly whereas that of the minerals (Na, K, Ca, Mg, Fe, Zn and Mn) was not affected in all cooking methods. Increased in Cu contents and decreased in P contents were observed in all cooking methods except grilling. In the present study, the grilling method of cooking is found to be the best for healthy eating.

7.
Environ Pollut ; 314: 120310, 2022 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-36206893

RESUMO

Bisphenol A (BPA) is one of the main ubiquitous compounds released from plastics in the environment. This compound, considered an endocrine disruptor, poses a risk to aquatic wildlife and human population, being included in multiple environmental monitoring programmes. Following the regulations restricting BPA use in the last years, BPA-like chemicals have been produced and used as BPA substitutes. However, they are not commonly included in monitoring programs yet and their presence is thus misrepresented, despite showing similar endocrine disrupting potential. In this work, an analytical method for analysing bisphenol A and five of its analogues (Bisphenol S, B, F, AF and Tetrabromobisphenol A) is described, validated for water (riverine, sea and wastewater), sediment, and biota (fish and biofilm) and applied to monitor their presence in the Ebro River Delta (NE Spain). In addition, plastic litter was also collected to evaluate their role as potential source of bisphenols. All compounds except BPF were detected in the analysed samples. Wastewater treatment plants (WWTPs) were discarded as major sources of BPs into the natural aquatic environment, as no BPs were detected in treated effluents. Indeed, the high levels of BPs in the natural environment could be related with direct discharge of raw wastewater from small rural population nucleus. The analysis of riverine plastic leachates yielded 4 out of the 6 BPs analysed, strengthening the hypothesis that plastic debris are also a source of BPs in the natural environment. Whereas Bisphenol S and BPA were detected in water and, to a limited extent, in biota, less polar analogues (mainly BPAF and TBBPA) were not found in any of the water samples. Instead, these hydrophobic BPs were found in fish tissues and biofilm, pointing out plastics and microplastics as their possible vectors. Finally, biofilm demonstrated its potential as sentinel of chemical contamination in freshwater environment.


Assuntos
Disruptores Endócrinos , Animais , Humanos , Disruptores Endócrinos/análise , Plásticos , Águas Residuárias/análise , Água/análise , Espanha , Microplásticos , Prevalência , Compostos Benzidrílicos/análise , Peixes , Biota
8.
Indian J Exp Biol ; 49(9): 684-8, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21941942

RESUMO

D-004, a lipid extract of Roystonea regia fruits that contains oleic, lauric and myristic acids as major components inhibits alpha1-adrenoreceptors-mediated contractile responses in isolated rat vas deferens and prostate trips; no study has demonstrated a similar effect for oleic, lauric or myristic acids individually. Therefore, the effects of D-004 (250 microg/mL), oleic (100 microg/mL), lauric (50 microg/mL) or myristic (25 microg/mL) acids and their combined effects on phenylephrine (PHE: 10(-7)-10(-4) mol/L) induced contractions has been studied. No treatment changed the basal tone of the preparations, but all inhibited PHE-induced contractions. D-004 produced the highest inhibition, followed by lauric acid, which was more effective than myristic and oleic acids against PHE-induced contractions of control group. D-004 and the mixture of the three acids produced similar inhibitions.


Assuntos
Antagonistas de Receptores Adrenérgicos alfa 1/farmacologia , Ácidos Láuricos/farmacologia , Contração Muscular/efeitos dos fármacos , Ácido Mirístico/farmacologia , Ácido Oleico/farmacologia , Ducto Deferente/efeitos dos fármacos , Antagonistas de Receptores Adrenérgicos alfa 1/isolamento & purificação , Animais , Arecaceae , Técnicas In Vitro , Ácidos Láuricos/isolamento & purificação , Masculino , Músculo Liso/efeitos dos fármacos , Ácido Mirístico/isolamento & purificação , Ácido Oleico/isolamento & purificação , Fenilefrina/farmacologia , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/farmacologia , Hiperplasia Prostática/tratamento farmacológico , Hiperplasia Prostática/metabolismo , Hiperplasia Prostática/fisiopatologia , Ratos , Ratos Sprague-Dawley , Ducto Deferente/metabolismo
9.
Hipertens Riesgo Vasc ; 38(3): 109-118, 2021.
Artigo em Espanhol | MEDLINE | ID: mdl-33863691

RESUMO

INTRODUCTION: Within the international project May Measurement Month, in Spain, the community pharmacy is where the greatest number of measurements are carried out and where the population can be made aware of the importance of regular blood pressure measurement. OBJECTIV: To ascertain the situation of the Spanish population's blood pressure and dissemination of the importance of its regular measurement through the community pharmacies. METHODS: Cross-sectional descriptive study carried out in Spanish community pharmacies during the month of May 2018, among pharmacy users of legal age. Systolic blood pressure, diastolic blood pressure and heart rate were measured as main variables. RESULTS: Five thousand, seven hundred and eighty-five readings were made by 891 pharmacists. One thousand, seven hundred and fifty-five (34.8%) people had not had their blood pressure measured in the last year. Of the participants, 31.2% had high blood pressure readings. Mean systolic blood pressure was 127.1±20.1 and mean diastolic blood pressure 77.5±12.5, higher in men (p<.001). There were normal blood pressure values in 3,981 (68.8%) patients; one high reading in 1,226 (21.2%); and two in 578 (10%). There were 912 (15.76%) patients with SBP≥140 and 314 (5.4%) with DBP≥90. Four (0.07%) hypertensive emergencies were detected. CONCLUSIONS: Three out of ten participants had a high blood pressure reading. Therefore, protocolized blood pressure readings carried out in a health care facility such as the community pharmacy, allowed the identification of a significant number of subjects with high and untreated blood pressure.


Assuntos
Hipertensão , Farmácias , Pressão Sanguínea , Estudos Transversais , Humanos , Hipertensão/diagnóstico , Hipertensão/epidemiologia , Masculino , Espanha
10.
Rev Neurol ; 73(9): 315-320, 2021 11 01.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-34676529

RESUMO

INTRODUCTION: To describe clinical characteristics and electrophysiological variants of GBS cases during the pandemic, we carried out a comparative analysis between SARS-CoV2 related GBS and non-SARS-CoV2 patients and then compared to the 2019 cases. PATIENTS AND METHODS: We carried out a cross-sectional study of GBS patients diagnosed according to Asbury and Cornblath criteria. We collected information on clinical and paraclinical variables. We defined a SARS-CoV-2 related GBS case according to the description of Ellul et al. We used Hadden criteria to classify the electrophysiological variants. We performed a comparative analysis between groups. RESULTS: Fourty-two patients were diagnosed with GBS in 2020, men 64.2%, age 46 ± 17.4 years, patients with obesity/overweight 42.8%, previous diarrhea 31%, history of respiratory tract infection 14.2%. Guillain Barre Disability Scale = 3 points 71.4% and, cranial nerve involvement 69%. The most frequent electrophysiological variant was acute inflammatory demyelinating polyradiculoneuropathy (AIDP) 53.5%. Seven (16.6%) cases were SARS-CoV2 related, four men, age 43.4 ± 13.4 years. When comparing patients with GBS in 2020 vs patients in 2019, we observed a decrease in the previous infection history during 2020 (45.2% vs 73.3%, p-value = 0.005) and a decrease in previous respiratory infection (14.2% vs 33.3%, p = 0.045), as well as a higher frequency of cranial nerve involvement, and albuminocytologic dissociation. CONCLUSIONS: SARS-CoV2 virus infection preventive measures may be impacting the presentation of post-infectious diseases such as GBS. We did not observe an increase in GBS cases during 2020. Also, the AIDP variant were more frequent in our population in the COVID-19 pandemic.


TITLE: Síndrome de Guillain-Barré durante la pandemia de COVID-19: experiencia de un centro de referencia en México.Introducción. Se trata de describir las características clínicas y variantes electrofisiológicas de los casos de síndrome de Guillain-Barré (SGB) durante la pandemia. Llevamos a cabo un análisis comparativo entre pacientes con SGB relacionado con el SARS-CoV-2 y sin antecedente del virus, y posteriormente realizamos una comparación con los casos de 2019. Pacientes y métodos. Se llevó a cabo un estudio transversal de los pacientes con diagnóstico de SGB según los criterios de Asbury y Cornblath. Se recolectaron información clínica y variables paraclínicas. Definimos el SGB relacionado con el SARS-CoV-2 conforme a la descripción de Ellul et al. Se utilizaron los criterios de Hadden para la clasificación de las variantes electrofisiológicas. Por último, realizamos un análisis comparativo entre grupos. Resultados. Se diagnosticó a 42 pacientes con SGB en 2020, un 64,2% hombres, con una edad de 46 ± 17,4 años, un 42,8% con obesidad/sobrepeso, un 31% con historia de diarrea previa y un 14,2% con infección respiratoria previa. El 71,4% tuvo una puntuación en la Guillain-Barré Disability Score igual o mayor que 3 puntos y el 69% tenía afectados los nervios del cráneo. La variante electrofisiológica más común fue la polirradiculoneuropatía desmielinizante inflamatoria aguda (PDIA; 53,5%). Siete (16,6%) casos tuvieron relación con el SARS-CoV-2, cuatro hombres, con edad de 43,4 ± 13,4 años. Al realizar la comparación entre pacientes con SGB de 2020 frente a los de 2019, observamos un decremento en el antecedente de infección previa en 2020 (45,2 frente a 73,3%; p = 0,005) y un decremento específico en la historia de infección respiratoria (14,2 frente a 33,3%; p = 0,045), así como una mayor frecuencia de afectación de los nervios del cráneo y de disociación albuminocitológica. Conclusiones. Las maniobras preventivas para la infección por el SARS-CoV-2 impactan directamente en la presentación de enfermedades postinfecciosas como el SGB. No observamos un incremento en los casos de SGB durante 2020. Asimismo, la variante de PDIA fue la más frecuente en nuestra población durante la pandemia de COVID-19.


Assuntos
COVID-19/complicações , Síndrome de Guillain-Barré/complicações , Adulto , Estudos Transversais , Feminino , Síndrome de Guillain-Barré/diagnóstico , Síndrome de Guillain-Barré/fisiopatologia , Instalações de Saúde , Humanos , Masculino , México , Pessoa de Meia-Idade , Encaminhamento e Consulta
11.
Dis Markers ; 2021: 5130628, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34987673

RESUMO

BACKGROUND: Patients with thalassemia major may suffer from complications due to iron overload. It has been suggested that several adipokines may play a potential role in the development of complications in thalassemia. Fatty acid-binding protein 4 (FABP4) is one of the adipokines, bridging several aspects of metabolic and inflammatory pathways. Little is known about the relationship between this adipokine and cardiac and liver function, especially in patients with thalassemia major. AIMS: This study is aimed at determining serum FABP4 levels in patients with thalassemia major and whether its concentration correlated with serum ferritin levels, as well as cardiac and liver function. METHODS: Thalassemia major outpatients (n = 48) completed laboratory examination, echocardiography, and electrocardiography. RESULTS: The mean age was 21.9 ± 8.0 years. A negative and weak correlation between serum ferritin and FABP4 was observed (r = -0.291, p < 0.05). In addition, there was moderate and positive correlation between left atrial volume index (LAVI) and FABP4 (r = 0.316, p < 0.05). CONCLUSIONS: Serum FABP4 correlated with serum ferritin and cardiac function in patients with thalassemia major. FABP4 may be a potential clinical biomarker for cardiac dysfunction via metabolic and inflammatory pathways due to iron accumulation and toxicity in patients with thalassemia major.


Assuntos
Proteínas de Ligação a Ácido Graxo/sangue , Ferritinas/sangue , Coração/fisiopatologia , Fígado/fisiopatologia , Talassemia beta/sangue , Talassemia beta/fisiopatologia , Adolescente , Adulto , Correlação de Dados , Feminino , Humanos , Masculino , Adulto Jovem
12.
Sci Total Environ ; 728: 138052, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-32361104

RESUMO

In recent decades many studies have proven the paramount impact of flow regimes on the structure of lotic ecosystems, both through extreme events (i.e. floods and droughts) but also during intermediate flows, which temporarily and spatially regulate the habitat availability. Human demand for water is steadily increasing and scientists are challenged to define ecosystem needs clearly enough to guide policies and management strategies. However, field studies demonstrated that a variety of interacting factors, such as, presence of barriers (e.g. dams) and temporal changes in habitat structure affect the abundance, composition and distribution of fish assemblages. This work based on quantile regression tested hypotheses to elucidate the effect of antecedent hydrological conditions on fish communities. A large monitoring database collecting and homogenizing the existing information on fish fauna in the Júcar River Basin District (Eastern Iberian Peninsula) was gathered and used to evaluate biological metrics (species richness, Capture Per Unit Effort-CPUE, and CPUE ratio over the total CPUE) related to life history strategies (i.e. periodic, opportunistic or equilibrium) and species origin (i.e. native, translocated or alien). The resulting dataset was complemented with diverse indicators of the measured daily discharge at the nearest gauging site. Most of the significant relationships confirmed the role of antecedent hydrological conditions as limiting factors, although other environmental factors likely play additional roles. In general, richness and abundance of alien species showed the higher proportion of significant associations, particularly spring flows and annual minima and maxima. These flow-ecology relationships shall be particularly useful to manage ecological responses to hydrological alteration. They also provide with clear ecological foundations for developing environmental flows assessments in Mediterranean river basins worldwide, using holistic approaches which can harmonise eco-hydrological approaches with smaller-scale and habitat-based ecohydraulics methods, especially under the current climate trends.


Assuntos
Ecossistema , Rios , Animais , Clima , Peixes , Hidrologia
13.
Vet World ; 13(7): 1311-1318, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32848305

RESUMO

BACKGROUND AND AIM: Cogon grass (Imperata cylindrica L.) (CGG) is a herbal medicine that could be developed into a male antifertility agent. The present study aims to determine the effect of an ethanol extract of CGG roots on mice testicular activity, reproductive hormone levels, and epididymal sperm quality. MATERIALS AND METHODS: This study was designed as completely randomized with three different doses, such as an ethanol extract of CGG roots at 0 (control), 90, and 115 mg/kg body weight. In total, 21 male DDY mice strain were treated with the CGG extract (by gavage) for 14 days, followed by an evaluation of reproductive organs, epididymal sperm quality, testis histology, histomorphometry, and reproductive hormone assays. All quantitative data were analyzed by analysis of variance, followed by Tukey's post hoc test at α=0.05. RESULTS: The results showed that the administration of the CGG root ethanol extract disrupted the testis interstitial area and seminiferous tubules, resulting in decreased epididymal sperm quality as well as serum testosterone levels in a dose-dependent pattern. CONCLUSION: Oral administration of a CGG root ethanol extract induced testicular damage, decreased epididymal sperm quality, and impaired testosterone secretion.

14.
Exp Cell Res ; 314(20): 3654-62, 2008 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-18929559

RESUMO

There is accumulating evidence indicating the role of aldosterone in the pathogenesis of hypertension and renal injury. In this study, we investigated the role of the Rho-kinase dependent signaling pathway in aldosterone-induced myofibroblastic transdifferentiation and collagen gene expression in rat mesangial cells (RMCs). Stimulation with aldosterone (1 nmol/L) significantly increased phosphorylation of myosin phosphatase target subunit-1 (MYPT-1), a marker of Rho-kinase activity, with a peak at 20 min in RMCs. Pre-incubation with a selective mineralocorticoid receptor antagonist, eplerenone (10 micromol/L), or a specific Rho-kinase inhibitor, Y27632 (10 micromol/L), attenuated the aldosterone-induced increase in MYPT-1 phosphorylation. Aldosterone also induced hypertrophy in RMCs, accompanied by an increase in actin polymerization and expression of alpha-smooth muscle actin (alpha-SMA), a myofibroblastic transdifferentiation marker. Collagen type I, III and IV mRNA levels were also increased with aldosterone stimulation. Pre-treatment with eplerenone or Y27632 prevented the aldosterone-induced cell hypertrophy, actin polymerization, the increase in alpha-SMA expression and the increases of collagen type I, III, IV mRNA levels in RMCs. These results suggest that aldosterone-induced mesangial cell hypertrophy is associated with cell transformation, leading to an increase in collagen gene expression via the Rho-kinase dependent signaling pathway.


Assuntos
Aldosterona/farmacologia , Transdiferenciação Celular/efeitos dos fármacos , Colágeno/genética , Células Mesangiais/efeitos dos fármacos , Desenvolvimento Muscular/efeitos dos fármacos , Quinases Associadas a rho/fisiologia , Amidas/farmacologia , Animais , Transdiferenciação Celular/genética , Eplerenona , Regulação da Expressão Gênica/efeitos dos fármacos , Hipertrofia , Células Mesangiais/metabolismo , Células Mesangiais/patologia , Células Mesangiais/fisiologia , Antagonistas de Receptores de Mineralocorticoides/farmacologia , Desenvolvimento Muscular/genética , Piridinas/farmacologia , Ratos , Ratos Sprague-Dawley , Receptores de Mineralocorticoides/metabolismo , Receptores de Mineralocorticoides/fisiologia , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/genética , Espironolactona/análogos & derivados , Espironolactona/farmacologia , Quinases Associadas a rho/metabolismo
15.
J Alzheimers Dis Rep ; 3(1): 59-70, 2019 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-31025030

RESUMO

To date, dysregulation of the insulin signaling pathway in the brain has not been demonstrated unequivocally in Alzheimer's disease (AD). The purpose of the study was to examine the possible dysregulation of insulin signaling pathway in an AD rat model. Furthermore, the present study investigated the effect of Donepezil and Curcumin on insulin signaling, insulin, and glucose levels in AD rat brain. The rats were induced to develop AD by intraperitoneal administration of Scopolamine. We found that glucose levels in plasma and brain were decreased in AD rats, whereas the insulin levels was increased in plasma but decreased in brain in AD rats. In addition, insulin signaling proteins IR-ß, IGF-1, IRS-1, IRS-2 p-Akt (Ser473), and Akt were markedly reduced in the AD rats. Furthermore, GLUT3 and GLUT4 levels in the brain were markedly reduced in AD rats. All these data were compared to Saline-treated control rats. Curcumin significantly increased glucose levels in plasma and in brain. However, insulin levels was decreased in plasma and was increased in AD rats' brain. Moreover, GLUT3 and GLUT4 levels were significantly increased in Curcumin-treated AD rats. All these data were compared to Scopolamine- induced AD rats. Thus amelioration of impaired insulin signaling and improved glucose regulation in AD rats by Curcumin may be beneficial in the management of AD.

16.
J Alzheimers Dis Rep ; 3(1): 257-267, 2019 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-31754658

RESUMO

Alzheimer's disease (AD) is the most common form of dementia. Extracellular amyloid-ß (Aß) aggregation and tau hyperphosphorylation are the key drivers of AD. Glycogen synthase kinase 3 (GSK3) and cyclin dependent kinase 5 (Cdk5) have been known as leading applicants arbitrating abnormal tau hyperphosphorylation. Thus, we evaluated the efficacy and underlying mechanism of action of curcumin in scopolamine-induced AD rats in our study. We found that curcumin-treated AD rats markedly reduced the levels of Aß40 and Aß42 in the brain and in the plasma in comparison to untreated AD rats. Moreover, the levels of phosphorylated tau at Ser396 (PHF13), Ser202/Thr205 (AT8), and Aß40/42 (MOAB2) were decreased significantly in AD rats treated with curcumin. Phospho-GSK3ß (Tyr216), the active form of GSK3ß, and total GSK3ß were significantly decreased in AD rats treated with curcumin. Furthermore, Cdk5 and its activators p35 and p25 were significantly decreased in curcumin-treated AD rats. The reduced levels of Cdk5, p35, p25, and GSK3ß in curcumin-treated AD rats may result decreased Aß aggregation and tau hyperphosphorylation, thus ameliorating AD. Impaired spatial memory and locomotor activity in AD rats were partially reversed by curcumin. Therefore, curcumin, as a natural compound present in turmeric, may be a more effective therapeutic agent in the treatment of AD in humans.

17.
Pharmazie ; 63(6): 486-8, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18604996

RESUMO

This study was done to determine the long-term effect of D-003 on bones of ovariectomized (ovx) rats distrib-uted in 4 groups: a false-operated and three groups of ovx rats: one treated with the vehicle and two with D-003 (5 and 250 mg/kg). D-003 significantly prevented, in a dose-dependent fashion, the trabecular bone volume (TBV), trabecular number (TbN) and trabecular thickness (TbTh) reduction induced in ovx rats and the increase of trabecular separation (TbSp) osteoclast number (OcN) and osteoclast surface (OcS/BS) increased in the positive controls versus the sham group. It is concluded that D-003 administered for 12 months prevented bone loss and decreased bone resorption in ovx rats, without evidences of impaired bone quality.


Assuntos
Conservadores da Densidade Óssea , Ácidos Graxos/farmacologia , Saccharum/química , Ceras/química , Animais , Reabsorção Óssea/tratamento farmacológico , Reabsorção Óssea/patologia , Osso e Ossos/patologia , Ácidos Graxos/química , Feminino , Peso Molecular , Osteoclastos/efeitos dos fármacos , Ovariectomia , Ratos , Ratos Sprague-Dawley , Malha Trabecular/efeitos dos fármacos
18.
Farm. comunitarios (Internet) ; 15(4): 13-25, 2023. tab
Artigo em Espanhol | IBECS (Espanha) | ID: ibc-226420

RESUMO

Objetivo: conocer dentro del proyecto May Measurement Month (MMM), la situación de la presión arterial (PA) en la población española, difundir la importancia de su medida periódica y estimar la prevalencia de hipertensión enmascarada (HEN). Métodos: estudio descriptivo transversal en farmacias comunitarias españolas durante mayo de 2019. Sujetos: usuarios adultos que consentían participar. Variables: presión arterial sistólica (PAS), presión arterial diastólica (PAD) en milímetros de mercurio (mmHg), frecuencia cardíaca (FC) en latidos/minuto (lat/min) A los participantes con PA ≥130/85 y <149/90 se les ofrecía realizar automedida (AMPA) para confirmar HEN. Resultados: 491 farmacéuticos recogieron 3.402 registros válidos (61,9% mujeres), edad media 56,6 años. 143 (4,2 %) nunca se habían medido la PA y 918 (27,0 %) no la habían medido en el último año. 1.047 tomaban antihipertensivos, de los que el 45,7 % tenían la PA alta. 780 (22,9 %) participantes tenían valores elevados de PA; ambos, 252 (7,4 %). La PASm fue 125,0 y la PADm 76,5 mmHg, mayor en hombres (p<0,001). La FCm fue de 72,6 lat/min. Se encontró relación directa entre PAS y PAD e IMC (p<0,0001). PADm y FCm fueron mayores en fumadores (p<0,0001). En pacientes diabéticos, PAS, PAD y FC fueron mayores. 61 participantes con sospecha de HEN aceptaron realizar AMPA. 25 (40,1 %) resultaron con PA ≥135/85 mmHg. Conclusiones: casi uno de cada cuatro participantes tenía valores de PA ≥140/90 mmHg. Los factores de riesgo relacionados más estrechamente con la PA elevada fueron sobrepeso, diabetes y edad. El 40 % de las sospechas de HEN se confirmaron mediante AMPA (AU)


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Determinação da Pressão Arterial , Hipertensão Mascarada/diagnóstico , Promoção da Saúde , Estudos Transversais
19.
Food Chem Toxicol ; 45(12): 2352-8, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17937974

RESUMO

D-003 is a mixture of high molecular weight sugarcane wax aliphatic primary acids with cholesterol-lowering, anti-platelet and antioxidant effects. This study investigated the long-term oral toxicity and carcinogenicity of D-003 in Sprague Dawley rats of both sexes, randomly distributed into four groups: a control group, treated only with the vehicle, and three treated with D-003 (50, 500 and 1500 mg/kg). All treatments were given orally for 24 months. Mortality (survival analysis), clinical symptoms, weight gain, food consumption, organ weights, time-to-tumour or tumour incidence data were not shown between group differences or trends. With the exception of serum cholesterol levels, lower in D-003-treated groups (500 and 1500 mg/kg) than in the controls, no other difference in blood indicators was found. D-003 did not increase the frequency of neoplastic and non-neoplastic lesions compared with the controls. The occurrence of all malignant and mammary tumours in D-003-treated females was lower than in the controls. The lesions observed were consistent with spontaneous lesions reported in this species. In conclusion, D-003 is not toxic or carcinogenic when given orally to Sprague Dawley rats up to 1500 mg/kg for 2 years, and 1500 mg/kg was a not-observable effect dose.


Assuntos
Anticolesterolemiantes/toxicidade , Ácidos Graxos/toxicidade , Inibidores da Agregação Plaquetária/toxicidade , Administração Oral , Animais , Anticolesterolemiantes/administração & dosagem , Anticolesterolemiantes/química , Testes de Carcinogenicidade , Ácidos Graxos/administração & dosagem , Ácidos Graxos/química , Feminino , Masculino , Peso Molecular , Inibidores da Agregação Plaquetária/administração & dosagem , Inibidores da Agregação Plaquetária/química , Ratos , Ratos Sprague-Dawley
20.
Farm. comunitarios (Internet) ; 14(4): 18-26, octubre 2022. graf
Artigo em Espanhol | IBECS (Espanha) | ID: ibc-213245

RESUMO

Introducción: la pandemia SARS-CoV-2 ha provocado importantes cambios en el sistema sanitario y como consecuencia retrasos en el control de las patologías crónicas. Además, el confinamiento impuso una serie de restricciones que modificaron las condiciones habituales, por lo que resulta de interés conocer su influencia en el paciente con hipertensión. Objetivos: determinar los cambios en los hábitos de estilos de vida saludables durante el confinamiento, en hipertensos tratados y que pudieran agravar su riesgo cardiovascular (RCV).Métodos: estudio observacional, transversal y descriptivo realizado del 10 de junio al 10 de julio de 2020 en farmacias comunitarias españolas. Los pacientes cumplimentaron un cuestionario sobre el conocimiento de su enfermedad y factores que pudieron afectarse durante el confinamiento.Resultados: participaron 215 pacientes. Un 84,7 % afirmó conocer su enfermedad, el 56,7 % conocía sus valores de presión arterial (PA). Un 9,6 % no se la controlaba antes, pasando al 46,3 % durante el confinamiento. La mayoría mantuvo sus hábitos de estilo de vida saludables, excepto en el ejercicio donde disminuyó un 68,4 %. El 34,9 % refiere haber sufrido ansiedad; 27 % tiene miedo de acudir a enfermería, 27,9 % al médico y 10,2 % a la farmacia. El 56,7 % usó telemedicina. Conclusiones: dentro de los hábitos saludables el confinamiento no ha modificado sustancialmente los hábitos alimenticios, pero ha supuesto una importante disminución del ejercicio físico y aumento de peso en la mitad de los pacientes, que, junto con la disminución en el control de los valores y seguimiento, repercute negativamente en el control de la PA y el RCV. (AU)


Assuntos
Humanos , Farmácia , Coronavírus Relacionado à Síndrome Respiratória Aguda Grave , Infecções por Coronavirus/epidemiologia , Estilo de Vida , Cooperação e Adesão ao Tratamento
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