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1.
Complement Ther Med ; 47: 102208, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31780012

RESUMO

OBJECTIVE: Physiologically, blood melatonin levels decrease as a person ages and the older adult commonly presents with insomnia and other types of sleep disorders. Alternative therapies can be used to attenuate sleep disturbances. The aim of the present study was to analyze the effect of aromatherapy with lavender on serum melatonin levels in the noninstitutionalized older adult (OA). DESIGN AND SETTING: A pre-experimental, quantitative study with a pre-test - post-test design was conducted on 67 OAs that included both sexes. MAIN OUTCOME MEASURES: Serum melatonin levels were measured before and after eight sessions of aromatherapy with lavender that lasted 4 weeks. The results were expressed as mean ±â€¯standard deviation of melatonin levels (pg/ml). The differences were compared using the Student's t-test and statistical significance was set at a p ≤ 0.05. RESULTS: Blood melatonin levels significantly increased in the total population after the intervention with aromatherapy (pg/ml): 102.3 ±â€¯33.4 VS 132.5 ±â€¯42.3, p = 0.000004. There were significant differences in the pre-test and post-test phases in the women and men measured as separate groups (p = 0.00005 and p = 0.026), respectively. However, those differences were not observed when the measurements were compared between the two sexes, before (p = 0.64) or after (p = 0.31) the intervention. CONCLUSION: Aromatherapy with lavender essential oil similarly favors an increase in blood melatonin levels in both older adult men and women.


Assuntos
Aromaterapia/métodos , Lavandula , Melatonina/sangue , Óleos Voláteis/uso terapêutico , Óleos de Plantas/uso terapêutico , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
2.
Br J Surg ; 106(9): 1126-1137, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31236917

RESUMO

BACKGROUND: The aim was to assess the effectiveness of routine administration of calcium +/- vitamin D3 compared with a serum calcium level-based strategy to prevent symptomatic hypocalcaemia after thyroidectomy. METHODS: RCTs comparing routine supplementation of calcium +/- vitamin D3 with treatment based on serum calcium levels measured after total thyroidectomy, published between 1980 and 2017, were identified in MEDLINE, Embase, LILACS and Google Scholar databases. Risk of bias was evaluated using the Cochrane Collaboration tool. Risk differences were calculated by random-effects meta-analysis. Meta-regression and cumulative meta-analysis were used to explore the best therapeutic approach. RESULTS: Fifteen studies with 3037 patients were included, and seven treatment comparisons were made. Routine supplementation with calcium + vitamin D3 offered a lower risk of symptomatic (risk difference (RD) -0·25, 95 per cent c.i. -0·32 to -0·18) and biochemical (RD -0·24, -0·31 to -0·17) hypocalcaemia than treatment based on measurement of calcium levels. The number needed to treat was 4 (95 per cent c.i. 3 to 6) for symptomatic hypocalcaemia. No publication bias was found; although heterogeneity was high for some comparisons, sensitivity analysis did not change the main results. CONCLUSION: Routine postoperative administration of calcium + vitamin D3 is effective in decreasing the rate of symptomatic and biochemical hypocalcaemia.


Assuntos
Cálcio/uso terapêutico , Colecalciferol/uso terapêutico , Suplementos Nutricionais , Hipocalcemia/prevenção & controle , Complicações Pós-Operatórias/prevenção & controle , Tireoidectomia/efeitos adversos , Cálcio/sangue , Colecalciferol/sangue , Humanos , Hipocalcemia/sangue , Hipocalcemia/etiologia
3.
Rev. cir. (Impr.) ; 71(2): 152-156, abr. 2019. tab
Artigo em Espanhol | LILACS | ID: biblio-1058248

RESUMO

OBJETIVO: Determinar predictores de buena respuesta con el uso de prótesis en la estenosis traqueobronquial. MATERIALES Y MÉTODO: Estudio retrospectivo descriptivo de una serie de casos entre junio de 2014 y junio de 2016. Se revisaron registros clínicos, protocolos operatorios, estudios histopatológicos y de imagen. Se consignaron antecedentes demográficos y clínicos al ingreso y luego del procedimiento, etiología de la estenosis traqueal, necesidad de oxígeno en litros, estadía hospitalaria, morbilidad asociada al procedimiento, indicación de terapia complementaria posterior y sobrevida. Se analizaron los datos con estadística descriptiva y analítica. RESULTADOS: Se realizaron 68 procedimientos, en 44 pacientes, 24 mujeres, el diagnóstico principal fue estenosis traqueal con 40 casos. La etiología neoplásica fue el 88% de los casos. El Performance status (PS) de ingreso fue mayor o igual a 2 en el 68% y posterior al procedimiento disminuyó a 22% p < 0,05. En 36 casos los pacientes requerían al menos 1 L de oxígeno lo que disminuyó en 13 casos posterior a la intervención p < 0,05. El tiempo de hospitalización promedio fue 6,2 días (1-60). En 13 pacientes con patología neoplásica se indicó terapia paliativa complementaria. La morbilidad asociada al procedimiento fue de 2,9% dado por prótesis desplazada y lesión iatrogénica. La sobrevida fue de 27% a un año. CONCLUSIONES: La etiología benigna, el PS previo a la intervención menor o igual a 3, requerimiento de oxígeno de 1 litro y obstrucción tumoral menor al 70% del lumen fueron elementos de buena respuesta.


AIM: Determine good response predictors in use of stent in benign and malignant tracheobronchial stenosis. MATERIAL AND METHODS: We retrospectively reviewed medical records of patients submitted to the procedure in the period 2014 to 2016. Clinical records, operative protocols, and histopathological and imaging studies were reviewed. Demographic and clinical data, performance status (PS) at admission and after the procedure, etiology of tracheal stenosis, need for oxygen in liters (L) Post-intervention, hospital stay, procedure-related morbidity, indication of therapy (Chemotherapy and/or Radiotherapy) and survival. Data were analyzed with descriptive and analytics statistics. RESULTS: A total of 68 procedures were performed in 44 patients, 24 women. Tracheal stenosis 40 cases were diagnosed. The malignant etiology was 88%. The admission PS was greater than or equal to 2 in 68% and 22% after the procedure. The oxygen requirements prior to the procedure were at least 1 L in 36 cases and decreased in 13 cases after the procedure. The average hospitalization period was 6.2 days (1-60). Complementary therapy was indicated in 13 patients; the morbidity associated with the procedure was 2.9%, displaced installation and iatrogenic injury. The one year survival was 27%. CONCLUSIONS: Benign etiology, el PS minor than or equal to 3, oxygen requirements prior to the procedure of 1 L and tumoral obstruction less than 75% were good response predictors in our study.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Adulto Jovem , Estenose Traqueal/cirurgia , Broncopatias/cirurgia , Stents , Próteses e Implantes , Estenose Traqueal/complicações , Broncopatias/complicações , Análise de Sobrevida , Estudos Retrospectivos , Resultado do Tratamento , Obstrução das Vias Respiratórias/etiologia , Tempo de Internação
4.
Rev. chil. urol ; 82(1): 32-37, 2017. tab
Artigo em Espanhol | LILACS | ID: biblio-905729

RESUMO

Introducción: La infección prostática y/o sistémica asociada a la Biopsia Prostática Transrectal (BPTR), es conocida y temida, por ser una complicación grave y potencialmente mortal. En el presente trabajo se analiza el impacto del uso de enema de Povidona Yodada Rectal en asociación a Quimioprofilaxis en la tasa de Infecciones Prostáticas y/o Sepsis secundaria.(AU)


Assuntos
Humanos , Quimioprevenção , Povidona-Iodo , Doenças Prostáticas
5.
Int J Pharm ; 450(1-2): 95-103, 2013 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-23618957

RESUMO

In view of acting as controlled delivery systems for nutritional supplementation, therapy or antioxidant activity at interfaces, alginate films of different copolymer composition and glycerol plasticizer levels were developed in the presence of Ca(2+) for achieving higher stability of L-(+)-ascorbic acid (AA). The ability of the alginate network to preserve AA from hydrolysis, tested by storage under vacuum at 25 °C, only decreased with the relative humidity (RH) increase when alginates were mainly constituted by guluronic-guluronic acid blocks (GG), whereas also decreased with the glycerol level increase when mannuronic-mannuronic acid (MM) and/or alternating guluronic-mannuronic (GM+MG) flexible blocks were present in higher proportions. This result could be probably related to the lower capability of the latter alginate block compositions to immobilize water in the network as they are not able to constitute Ca(2+) mediated junction zones where water molecules are highly retained. Films also studied under air storage showed that even at less favorable conditions of RH and glycerol levels, both GG and GM+MG enriched alginate networks in general preserved AA from oxidation. It also demonstrated that hydrolysis is the principal way by which AA is lost when supported in films.


Assuntos
Alginatos/química , Ácido Ascórbico/química , Estabilidade de Medicamentos , Armazenamento de Medicamentos , Glicerol/química , Umidade , Hidrólise , Oxirredução , Plastificantes/química
6.
Environ Sci Pollut Res Int ; 20(12): 8446-56, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23589273

RESUMO

Water in lakes and reservoirs accumulate phosphorous (P) from both internal and external loads. The external P load (EPL) coming from the watershed is considered to be the main cause of eutrophication of water bodies, and control strategies therefore focus on its reduction. However, algae blooms and anoxic conditions often continue even after EPL have been controlled, being the internal P load (IPL) originating from the sediment the main sources of P. To assess the efficiency of the adsorbent Phoslock (a modified bentonite) in controlling P concentrations in water and immobilize releasable P in sediments, mesocosm trials were carried out in a eutrophied reservoir and a model was described and applied that determines the amount of adsorbent and the application frequency necessary to control P concentrations in a eutrophied reservoir. The mesocosm trials confirm that Phoslock reduced P concentrations to or below the limits that define water in mesotrophic state, in approximately 2 weeks. The modeling results suggest that periodic reapplications of the adsorbent are required, unless EPL is reduced by 36 %, which allows the P concentrations in the water column to be constant. Such reduction in EPL would allow future applications of the adsorbent to be required only for control of IPL. The developed model allows planning remediation actions by determining quantities and frequencies for application of adsorbents for P control in eutrophied lakes and reservoirs.


Assuntos
Recuperação e Remediação Ambiental/métodos , Eutrofização , Lagos/química , Fósforo/análise , Poluentes Químicos da Água/análise , Bentonita/química , Sedimentos Geológicos/química , Modelos Químicos , Fósforo/química , Poluentes Químicos da Água/química
7.
Food Sci Technol Int ; 17(6): 517-27, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22049159

RESUMO

The present work was dedicated to the development of an extraction process for red beet (Beta vulgaris L. var. conditiva) by-products that preserves the high molecular weight of the macromolecules with the primary aim of waste upgrading. Our study concerns the extraction of pectin-enriched products with potential thickening properties for their usage in food formulation, as well as with some healthy physiological effect, by using citrate buffer (pH = 5.2) either alone or with enzymes (hemicellulase or cellulase) active on cell wall polysaccharide networks. Considering that red beet tissue contains ferulic acid, which cross-links pectin macromolecules through arabinose residues to anchor them into the cell wall, an alkaline pretreatment was also evaluated in order to perform polysaccharide hydrolysis in the cell wall network to accomplish higher renderings. Chemical composition and yield, as well as the in vitro glucose retention exerted by the isolated fiber products were finally analyzed.


Assuntos
Beta vulgaris/química , Aditivos Alimentares/química , Aditivos Alimentares/isolamento & purificação , Pectinas/química , Pectinas/isolamento & purificação , Raízes de Plantas/química , Celulase/metabolismo , Diálise , Fibras na Dieta/análise , Fibras na Dieta/economia , Estudos de Viabilidade , Aditivos Alimentares/economia , Indústria de Processamento de Alimentos/economia , Proteínas Fúngicas/metabolismo , Glucose/análise , Glucose/química , Glicosídeo Hidrolases/metabolismo , Concentração de Íons de Hidrogênio , Hidrólise , Peso Molecular , Pectinas/economia , Pectinas/metabolismo , Solubilidade , Resíduos/análise , Resíduos/economia
8.
Pharm Biol ; 48(7): 732-9, 2010 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20645769

RESUMO

This study demonstrated that the aqueous extracts of plants employed in Mexican traditional medicine for the treatment of cardiovascular diseases are able to modify the tone of arterial smooth muscle. Agastache mexicana (Kunth) Lint & Epling (Labiatae), Chenopodium murale L. (Chenopodiaceae), Chirantodendron pentadactylon Larreat (Sterculiaceae), Dracocephalum moldavica L. (Labiatae), Psittacanthus calyculatus G. Don (Loranthaceae), Prunus serotina ssp. capuli (Cav. ex Spreng) McVaugh (Rosaceae), and Sechium edule Sw. (Cucurbitaceae) contain secondary metabolites that promote vascular relaxation and display antioxidant activities. As expected, their antioxidant effects showed a significant correlation with the polyphenolics content. However, a lower correlation was found between the antioxidant activity and the maximum vasodilatory effect, suggesting that the vasodilatation elicited by the plant extracts could be only partly attributed to their antioxidant properties. The extract of P. calyculatus, which displayed a maximum vasorelaxant effect that was higher than that of acetylcholine, induced endothelium-dependent vasodilatation. Futhermore, the vasorelaxant response to the P. calyculatus extract was reduced after adding an inhibitor of soluble guanylate cyclase activity, providing evidence that the NO/cGMP pathway is involved. On the other hand, the extracts of Bocconia frutescens L. (Papaveraceae), Magnolia grandiflora L. (Magnoliaceae), and Solanum rostratum Dunal (Solanaceae) induced concentration-dependent contraction of rat aortic rings, suggesting that these plants have potential health benefits for the treatment of ailments such as venous insufficiency. The pharmacological activities of the extracts studied provide scientific support for their ethnomedical use.


Assuntos
Antioxidantes/farmacologia , Doenças Cardiovasculares/tratamento farmacológico , Fitoterapia , Extratos Vegetais/farmacologia , Vasoconstritores/farmacologia , Vasodilatadores/farmacologia , Animais , Aorta/metabolismo , Compostos de Bifenilo/metabolismo , Avaliação Pré-Clínica de Medicamentos , Flavonoides/análise , Técnicas In Vitro , Masculino , Medicina Tradicional , México , Fenóis/análise , Picratos/metabolismo , Extratos Vegetais/química , Plantas Medicinais , Ratos , Ratos Wistar
11.
Rev Neurol ; 49(12): 639-44, 2009.
Artigo em Espanhol | MEDLINE | ID: mdl-20013716

RESUMO

INTRODUCTION: The complicated forms of rolandic epilepsy progress with a continuous spike-wave pattern in slow-wave sleep. Experiments conducted in cats suggest that this pattern can only appear if there is bilateral thalamic insult. AIM. To determine whether thalamic hypoperfusion is associated with the complicated variants of rolandic epilepsy. PATIENTS AND METHODS: A group of 24 children were studied over a period of six years following their first epileptic seizure. During the follow-up an interictal magnetic resonance scan and single-photon emission computerised tomography (SPECT) were performed. Results were examined to ascertain whether there were asymmetries in the distribution of cerebral blood flow through structures, using parametric statistical maps. The brain SPECT was performed when progression to atypical benign partial epilepsy in infancy was diagnosed and in typical forms of rolandic epilepsy when there was some mild neuropsychological deficit that led the specialist to suspect the existence of a focal cortical lesion. RESULTS: Bilateral thalamic hypoperfusion was found in all patients diagnosed with atypical benign partial epilepsy in infancy, which was correlated with the presence of continuous spike-waves during the slow-wave phase of non-REM sleep. CONCLUSIONS: Bilateral thalamic hypoperfusion seems to be a necessary condition for the atypical progression of rolandic epilepsy.


Assuntos
Epilepsia Rolândica , Imageamento por Ressonância Magnética/métodos , Tálamo , Tomografia Computadorizada de Emissão de Fóton Único/métodos , Animais , Gatos , Circulação Cerebrovascular , Criança , Pré-Escolar , Progressão da Doença , Eletroencefalografia , Epilepsia Rolândica/patologia , Epilepsia Rolândica/fisiopatologia , Feminino , Seguimentos , Humanos , Masculino , Transtornos Mentais/fisiopatologia , Fluxo Sanguíneo Regional , Tálamo/patologia , Tálamo/fisiopatologia
12.
Arch Environ Contam Toxicol ; 48(4): 509-14, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15886894

RESUMO

Polychaetes, Eurythoe complanata, from the Gulf of Cariaco,Venezuela, were exposed to 0.3, 1.6, and 3.3% water-soluble fraction (WSF) of used crankcase oil during 15 and 21 days. The antioxidant enzymes glutathione peroxidase (GPX), glutathione reductase (GR), catalase (CAT), and glutathione-S-transferase (GST) were assayed in the body wall tissue. Furthermore, after chemical exposure, the polychaetes were cut into equal halves; then wound healing and the number of regenerated body segments were recorded periodically. GST activity was affected by all the experimental treatments, with activity increasing with WSF concentrations. GPx activity was altered for the contamination period. GR and CAT activities rose in response to increasing WSF concentrations, and were higher for long-term than for short-term exposures. The wound healing of the transected body regions was retarded by WSF exposure. WSF affected the tissue regeneration, which was almost abolished at 3.3% WSF. The exposure period did not affect the tissue-repairing responses. Alteration of GST in contaminated organisms suggested equivalent changes in detoxication of bioaccumulated organic contaminants. The variation of GR and CAT suggests induction of oxidative stress that could reduce the ability of WSF-exposed worms to repair damaged tissue.


Assuntos
Veículos Automotores , Petróleo/toxicidade , Poliquetos/fisiologia , Animais , Catalase/biossíntese , Glutationa Peroxidase/metabolismo , Glutationa Redutase/biossíntese , Glutationa Transferase/biossíntese , Petróleo/análise , Poliquetos/enzimologia , Regeneração , Solubilidade
13.
Climacteric ; 7(4): 397-403, 2004 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-15799611

RESUMO

BACKGROUND: Phytoestrogens are a family of plant-derived compounds with weak estrogenic and antiestrogenic properties. The antioxidant capacity of phytoestrogens has been proposed as one of the important mechanisms that explain their health benefits. OBJECTIVE: To determine the in vitro potency of three phytoestrogens, ubiquitous in food, (biochanin A, daidzein and genistein) as antioxidants of low density lipoprotein (LDL) and to compare them with the well-established antioxidant actions of estradiol and quercetin, an ubiquitous flavonoid which is found in high concentration in onions, tea and berries. METHODS: LDL was isolated by ultracentrifugation from the plasma of ten healthy postmenopausal women who were not on hormone therapy. Aliquots containing 0.5 mg of protein were incubated for 4 h with CuSO4 15 micromol/l to induce oxidative stress and with one of the five compounds studied: estradiol, quercetin, biochanin A, daidzein, and genistein, in doses of 0, 5, 15, 50, 500, 1000 and 2000 micromol/l. In addition, we studied the combined effect of estradiol 1 micromol/l plus quercetin 1 micromol/l, comparing their antioxidant action with that of each compound separately. Malonaldehyde (MDE nmol/ mg protein) was measured as a marker of LDL oxidation. RESULTS: Estradiol and quercetin induced a dose-dependent decrease in MDE concentration (p < 0.01). Comparing the areas under the curve, the antioxidant effect of quercetin was 8 times higher than the one observed with estradiol (p < 0.01). A 50% decrease in MDE was reached by quercetin at a concentration of 3.4 micromol/l, estradiol at 29 micromol/l, genistein at 280 micromol/l, biochanin at 1312 mmol/l and daidzein at 8007 mmol/l. Estradiol 1 micromol/l and quercetin 1 micromol/l did not modify MDE generation separately, but, when incubated combined, there was a significant decrease of MDE (p < 0.02). CONCLUSION: The phytoestrogens studied showed a weak antioxidant activity in vitro. The flavonoid quercetin, in contrast, showed the most potent antioxidant activity in vitro, higher than estradiol. Estradiol and quercetin showed additive antioxidant activity. We speculate that different compounds with variable antioxidant effects could amplify their antioxidant capacity when acting combined.


Assuntos
Antioxidantes/farmacologia , LDL-Colesterol/sangue , Malondialdeído/sangue , Fitoestrógenos/farmacologia , Quercetina/farmacologia , Relação Dose-Resposta a Droga , Quimioterapia Combinada , Estradiol/farmacologia , Feminino , Humanos , Técnicas In Vitro , Isoflavonas/farmacologia , Pessoa de Meia-Idade , Pós-Menopausa/fisiologia
14.
Phytomedicine ; 10(5): 416-21, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-12834007

RESUMO

The two-electrode voltage-clamp technique was employed to investigate the effects of chloroform-methanol (1:1) extracts derived from five medicinal plants on Xenopus laevis oocytes. When evaluated at concentrations of 1 to 500 microg/ml, the extracts prepared from the aerial parts of Baccharis heterophylla H.B.K (Asteraceae), Chenopodium murale L. (Chenopodiaceae), Desmodium grahami Gray (Leguminosae) and Solanum rostratum Dun (Solanaceae) produced concentration-dependent oscillatory inward currents in the oocytes, while the extract of Gentiana spathacea did not induce any response. The reversal potential of the currents elicited by the active extracts was -17 +/- 2 mV and was similar to the chloride equilibrium potential in oocytes. These ionic responses were independent of extracellular calcium. However, they were eliminated by overnight incubation with BAPTA-AM (10 microM), suggesting that the currents were dependent on intracellular Ca2+ increase. Thus the plant extracts activate the typical oscillatory Ca(2+)-dependent Cl- currents generated in the Xenopus oocyte membrane more probably via a mechanism that involves release of Ca2+ from intracellular reservoirs. These observations suggest that Xenopus oocyte electrophysiological recording constitutes a suitable assay for the study of the mechanisms of action of herbal medicines.


Assuntos
Cálcio/metabolismo , Canais de Cloreto/metabolismo , Medicina Tradicional , Oócitos/efeitos dos fármacos , Oócitos/metabolismo , Extratos Vegetais/farmacologia , Plantas Medicinais/química , Animais , Sinalização do Cálcio/efeitos dos fármacos , Relação Dose-Resposta a Droga , Potenciais da Membrana/efeitos dos fármacos , México , Extratos Vegetais/química , Xenopus laevis
15.
Hipertensión (Madr., Ed. impr.) ; 19(4): 157-162, mayo 2002. tab
Artigo em Es | IBECS | ID: ibc-14911

RESUMO

El hiperaldosteronismo primario (HA1.º) es una forma secundaria de hipertensión arterial (HTA) de fácil diagnóstico, provocado por la secreción inadecuada de aldosterona por la corteza suprarrenal. Con el objeto de establecer las principales características clínicas y bioquímicas de estos pacientes revisamos la base de datos de los últimos 20 años de la consulta monográfica de HTA del Servicio de Nefrología del Hospital San Pedro de Alcántara. De los 937 pacientes con HTA de origen no renal, 16 fueron diagnosticados de HA1.º (1,7 por ciento). No encontramos diferencias en cuanto al sexo. La media de edad fue de 45,8 +/- 9,28 años. Sólo 10 de los 16 presentaban clínica sugerente de HA1.º La tensión arterial (TA) media en la primera consulta fue de 161 +/- 19/101 +/- 13 mmHg. La repercusión orgánica en el momento del diagnóstico era grado II en el 50 por ciento de los casos y grado I en el 50 por ciento restante. Se constató hipopotasemia en 10 pacientes; los 6 restantes presentaban niveles de potasio normales. En todos encontramos niveles elevados de aldosterona basal; en 2 casos la renina no se encontraba suprimida. La gammagrafía con yodo-colesterol permitió localizar la lesión en 13 de los 16 pacientes; la tomografía axial computarizada y la resonancia magnética identificaron 2 casos confirmados por el test postural y la respuesta quirúrgica; en un caso no pudo establecerse la localización. Se diagnosticaron 8 adenomas y 7 hiperplasias bilaterales. Se intervinieron quirúrgicamente 5 de los adenomas, permaneciendo 3 pacientes normotensos son tratamiento y dos con buena respuesta ( cifras de TA normales con dosis bajas de espironolactona). Las hiperplasias, los adenomas no intervenidos y el caso no localizado presentan cifras de TA normales con dosis bajas de espironolactona (AU)


Assuntos
Adulto , Idoso , Feminino , Masculino , Pessoa de Meia-Idade , Humanos , Hipertensão/complicações , Hipertensão/diagnóstico , Espironolactona/administração & dosagem , Espironolactona/uso terapêutico , Aldosterona/administração & dosagem , Aldosterona/uso terapêutico , Hiperaldosteronismo/diagnóstico , Hiperaldosteronismo/terapia , Compostos de Iodo/administração & dosagem , Compostos de Iodo , Hipotensão/complicações , Hipotensão/diagnóstico , Tomografia Computadorizada de Emissão/métodos , Espectroscopia de Ressonância Magnética , Prognóstico Clínico Dinâmico Homeopático , Estudos Retrospectivos , Adenoma/diagnóstico , Adenoma/cirurgia
16.
Biochem J ; 359(Pt 3): 567-74, 2001 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-11672430

RESUMO

Endothelial cell (EC) junctions regulate in large part the integrity and barrier function of the vascular endothelium. Advanced glycation end-products (AGEs), the irreversibly formed reactive derivatives of non-enzymic glucose-protein condensation reactions, are strongly implicated in endothelial dysfunction that distinguishes diabetes- and aging-associated vascular complications. The aim of the present study was to determine whether AGEs affect EC lateral junction proteins, with particular regard to the vascular endothelial cadherin (VE-cadherin) complex. Our results indicate that AGE-modified BSA (AGE-BSA), a prototype of advanced glycated proteins, disrupts the VE-cadherin complex when administered to ECs. AGE-BSA, but not unmodified BSA, was found to induce decreases in the levels of VE-cadherin, beta-catenin and gamma-catenin in the complex and in total cell extracts, as well as a marked reduction in the amount of VE-cadherin present at the cell surface. In contrast, the level of platelet endothelial cell adhesion molecule-1 (PECAM-1), which is located at lateral junctions, was not altered. Supplementation of the cellular antioxidative defences abolished these effects. Finally, the loss of components of the VE-cadherin complex was correlated with increases in vascular permeability and in EC migration. These findings suggest that some of the AGE-induced biological effects on the endothelium could be mediated, at least in part, by the weakening of intercellular contacts caused by decreases in the amount of VE-cadherin present.


Assuntos
Albuminas/metabolismo , Caderinas/metabolismo , Endotélio Vascular/metabolismo , Produtos Finais de Glicação Avançada/metabolismo , Produtos Finais de Glicação Avançada/farmacologia , Soroalbumina Bovina/farmacologia , Transativadores , Acetilcisteína/farmacologia , Animais , Bovinos , Células Cultivadas , Proteínas do Citoesqueleto/metabolismo , Endotélio Vascular/citologia , Endotélio Vascular/efeitos dos fármacos , Sequestradores de Radicais Livres/farmacologia , Humanos , Imuno-Histoquímica , Camundongos , beta Catenina
17.
Planta Med ; 66(8): 765-7, 2000 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11199140

RESUMO

Bioassay directed fractionation of the (1:1) chloroform-methanol extract of Gentiana spathacea H.B.K (Gentianaceae) led to the isolation of gentiopicroside (gentiopricrin) (1), the major spasmolytic component of the plant. Gentiopicroside inhibited, in a concentration-dependent manner, the spontaneous contractions of isolated guinea pig ileum. Contractions induced by histamine, acetylcholine, BaCl2 and KCl on the ileum were also significantly blocked by this monoterpene glucoside, which suggests that this compound might be interfering with calcium influx into the smooth muscle cells.


Assuntos
Glucosídeos/farmacologia , Iridoides , Magnoliopsida/química , Músculo Liso/efeitos dos fármacos , Piranos/farmacologia , Animais , Glucosídeos/química , Glucosídeos/isolamento & purificação , Cobaias , Íleo/efeitos dos fármacos , Íleo/fisiologia , Glucosídeos Iridoides , Relaxamento Muscular/efeitos dos fármacos , Músculo Liso/fisiologia , Piranos/química , Piranos/isolamento & purificação
18.
Planta Med ; 65(2): 109-14, 1999 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10193199

RESUMO

Five aromatic compounds, 3,4'-dihydroxy-5,5'-dimethoxybibenzyl (1), batatasin III (2), coelonin (3), 3,7-dihydroxy-2,4-dimethoxyphenanthrene (4), and 3,7-dihydroxy-2,4,8-trimethoxyphenanthrene (5) were isolated from the orchid Scaphyglottis livida (Lindley) Schltr. Compounds 1-5 induced a concentration-dependent inhibition of the spontaneous contractions of the rat ileum with potencies comparable or higher to that of papaverine. The relaxation evoked by compounds 1-4 was blocked by L-NAME, an inhibitor of nitric oxide synthase. It was also demonstrated that 1 increased cyclic GMP content in rat ileum rings. Compound 1-induced elevation of cGMP was inhibited by L-NAME and ODQ, inhibitors of nitric oxide synthase and soluble guanylyl cyclase, respectively. These results indicate that nitric oxide/cGMP formation constitute the signaling pathway in the spasmolytic action of compound 1.


Assuntos
Bibenzilas/farmacologia , GMP Cíclico/fisiologia , Óxido Nítrico/fisiologia , Parassimpatolíticos/farmacologia , Plantas Medicinais/química , Animais , Bibenzilas/isolamento & purificação , Masculino , Ratos , Ratos Sprague-Dawley , Ratos Wistar
19.
Phytomedicine ; 6(5): 367-71, 1999 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11962546

RESUMO

The present study was performed to investigate the effect of chloroform-methanol (1:1) extracts derived from Baccharis heterophylla H. B. K (Asteraceae), Desmodium grahami Gray (Leguminosae), Dyssodia pinnata var. pinnata Rob. (Asteraceae), Gentiana spathacea H. B. K. (Gentianaceae), Loeselia mexicana Brand. (Polemoniaceae), Selaginella pallescens Spring. (Selaginellaceae) and Zornia diphylla Pers. (Fabaceae) on the spontaneous contractions of isolated rat ileum. The concentration-response curves and IC50 values were obtained and the respective relaxant potencies were compared with that of the CHCl3-MeOH (1:1) extract of Datura lanosa. The data showed that all the extracts produce a concentration-dependent inhibition of spontaneous ileum contractions. In addition, the antimicrobial activity of the extracts against pathogenic enterobacteria was tested. The pharmacological actions shown by the extracts of the selected species tend to support ethnomedical use of the plants for the treatment of gastrointestinal disorders.


Assuntos
Gastroenteropatias/tratamento farmacológico , Medicina Tradicional , Parassimpatolíticos/uso terapêutico , Fitoterapia , Extratos Vegetais/uso terapêutico , Plantas Medicinais , Animais , Relação Dose-Resposta a Droga , Etnobotânica , Gastroenteropatias/fisiopatologia , Íleo/efeitos dos fármacos , Íleo/fisiopatologia , Indígenas Norte-Americanos , Magnoliopsida/química , Masculino , México/etnologia , Relaxamento Muscular/efeitos dos fármacos , Músculo Liso/efeitos dos fármacos , Músculo Liso/fisiopatologia , Parassimpatolíticos/farmacologia , Extratos Vegetais/farmacologia , Ratos , Ratos Sprague-Dawley
20.
Planta Med ; 63(1): 31-5, 1997 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9063094

RESUMO

Activity-guided fractionation of the smooth muscle relaxing, chloroform-methanol (1:1) extract of Conyza filaginoides (D.C.) Hieron (Asteraceae) led to the isolation of three flavonoids (quercetin 3-glucoside, rutin, and pinostrobin), one sterol (alpha-spinasterol), a sesquiterpenoid (beta-caryophyllene 4,5-alpha-oxide), and two triterpenoids (erythrodiol and 3-beta-tridecanoyloxy-28-hydroxyolean-12-ene). 3-beta-Tridecanoyloxy-28-hydroxy-olean-12-ene is a new naturally occurring terpenoid. All the isolated compounds induced a concentration-dependent inhibition of the spontaneous contractions of rat ileum. The spasmolytic activity exhibited by the extract and active principles tends to support the traditional use of C filaginoides as an antispasmodic agent.


Assuntos
Flavonoides/farmacologia , Músculo Liso/efeitos dos fármacos , Plantas Medicinais/química , Terpenos/farmacologia , Animais , Flavonoides/química , Flavonoides/isolamento & purificação , Íleo/efeitos dos fármacos , Íleo/fisiologia , Técnicas In Vitro , Masculino , Relaxamento Muscular/efeitos dos fármacos , Músculo Liso/fisiologia , Ratos , Ratos Wistar , Análise Espectral , Terpenos/química , Terpenos/isolamento & purificação
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