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1.
Ciênc. rural (Online) ; 49(8): e20180964, 2019. tab
Article in English | LILACS | ID: biblio-1045424

ABSTRACT

ABSTRACT: The essential oils of the different parts of Lavandula dentata L. (inflorescences and aerial part without inflorescences) collected in the city of Uberaba (minas Gerais State)were obtained by hydro distillation, and their chemical composition was determined by gas chromatography coupled to mass spectrometry and compared to the chemical composition of essential oil of Lavandula hybrida and Lavandula officinalis. It was observed that the essential oils of the studied species have varied chemical composition and are composed mainly of monoterpenes. The essential oils of L. hybrida and L. officinalis showed a higher concentration of linalool and linaline acetate, while L. dentata L. presented higher concentration of fenchone, eucalyptol and camphor. Results indicate that the essential oil composition of L. dentata L. grown in Uberaba is similar to those produced in Curitiba - PR, providing a promising perspective for the cultivation and extraction of essential oils of this species in Minas Gerais.


RESUMO: Os óleos essenciais das diferentes partes de Lavandula dentata L. (inflorescências e parte aérea sem inflorescência) coletados em Uberaba - MG foram obtidos por hidrodestilação, e sua composição química foi determinada por cromatografia gasosa acoplada a espectrometria de massas e comparada à composição química de óleo essencial de Lavandula hybrida e Lavandula officinalis. Observou-se que os óleos essenciais das espécies estudadas possuem composição química variada e são compostos, principalmente, por monoterpenos. Os óleos essenciais de L. hybrida e L. officinalis apresentaram maior concentração de linalol e acetato de linalina, enquanto L. dentata L. apresentou maior concentração de fenchona, eucaliptol e cânfora. Os resultados indicam que os óleos essenciais de L. dentata L. cultivada em Uberaba são semelhantes aos produzidos em Curitiba - PR, tornando-se uma perspectiva promissora para o cultivo e extração de óleos essenciais desta espécie em Minas Gerais.

2.
Arq. bras. cardiol ; 109(5): 425-431, Nov. 2017. graf
Article in English | LILACS | ID: biblio-887958

ABSTRACT

Abstract Background: Angiotensin II (Ang II), the primary effector hormone of the renin-angiotensin system (RAS), acts systemically or locally, being produced by the action of angiotensin-converting-enzyme (ACE) on angiotensin I. Although several tissue RASs, such as cardiac RAS, have been described, little is known about the presence of an RAS in the pericardial fluid and its possible sources. Locally produced Ang II has paracrine and autocrine effects, inducing left ventricular hypertrophy, fibrosis, heart failure and cardiac dysfunction. Because of the difficulties inherent in human pericardial fluid collection, appropriate experimental models are useful to obtain data regarding the characteristics of the pericardial fluid and surrounding tissues. Objectives: To evidence the presence of constituents of the Ang II production paths in bovine pericardial fluid and parietal pericardium. Methods: Albumin-free crude extracts of bovine pericardial fluid, immunoprecipitated with anti-ACE antibody, were submitted to electrophoresis (SDS-PAGE) and gels stained with coomassie blue. Duplicates of gels were probed with anti-ACE antibody. In the pericardial membranes, ACE was detected by use of immunofluorescence. Results: Immunodetection on nitrocellulose membranes showed a 146-KDa ACE isoform in the bovine pericardial fluid. On the pericardial membrane sections, ACE was immunolocalized in the mesothelial layer. Conclusions: The ACE isoform in the bovine pericardial fluid and parietal pericardium should account at least partially for the production of Ang II in the pericardial space, and should be considered when assessing the cardiac RAS.


Resumo Fundamentos: Angiotensina II (Ang II), o hormônio efetor primário do sistema renina-angiotensina (SRA), atuando em níveis sistêmicos ou locais, é produzida pela ação da enzima conversora de angiotensina (ECA) sobre a angiotensina I. Embora diversos SRAs teciduais, como o SRA cardíaco, tenham sido descritos em muitos estudos, dados de um SRA no líquido pericárdico e sua origem não são ainda disponíveis. A Ang II localmente produzida tem efeitos parácrinos e autócrinos, induzindo a hipertrofia ventricular esquerda, fibrose, insuficiência e disfunção cardíacas. Devido às dificuldades inerentes à obtenção de líquido pericárdico humano, modelos experimentais apropriados são muito úteis para obter dados relativos às suas características bem como dos tecidos contíguos. Objetivos: Obter evidências da presença de constituintes das vias de produção de Ang II no líquido pericárdico e no pericárdio parietal bovinos. Métodos: Extratos brutos de líquido pericárdico bovino sem albumina (sobrenadantes), imunoprecipitados com anticorpo anti-ECA, foram submetidos a eletroforese (SDS-PAGE) e os géis corados com Coomassie Blue. Duplicatas dos géis foram sondadas com anticorpo anti-ECA. A detecção de ECA nas membranas pericárdicas foi realizada por imunofluorescência. Resultados: A imunodetecção sobre as membranas de nitrocelulose mostrou uma isoforma de ECA com 146 KDa no líquido pericárdico bovino. Nas secções de membrana pericárdica, a ECA foi imunolocalizada na camada mesotelial. Conclusões: A isoforma de ECA do líquido pericárdico bovino e do pericárdio parietal deve ser, pelo menos em parte, responsável pela produção de Ang II no espaço pericárdico, devendo ser considerada quando o SRA cardíaco for avaliado.


Subject(s)
Animals , Pericardium/enzymology , Peptidyl-Dipeptidase A/biosynthesis , Pericardial Fluid/enzymology , Cattle , Fluoroimmunoassay , Immunoprecipitation , Electrophoresis, Polyacrylamide Gel
3.
Arq. bras. cardiol ; 91(3): 172-178, set. 2008. ilus, tab
Article in Portuguese, English | LILACS | ID: lil-494312

ABSTRACT

FUNDAMENTO: A caracterização de uma enzima conversora de angiotensina (ECA) no líquido pericárdico humano é relevante diante do seu papel na liberação de angiotensina II e, portanto, do papel do pericárdio na homeostase cardivascular. OBJETIVO: Isolar e caracterizar uma ECA do líquido pericárdico humano. Comparar as atividades conversoras de angiotensina I do fluido pericárdico e do soro de pacientes submetidos à cirurgia cardiovascular. MÉTODOS: A enzima do líquido pericárdico humano foi purificada por meio de etapas cromatográficas e caracterizada por eletroforese em gel de poliacrilamida (SDS-PAGE), hidrólise de angiotensina I, bradicinina, Hip-His-Leu e substratos sintéticos com supressão interna de fluorescência. Lisinopril foi usado como inibidor. A atividade de ECA foi determinada em amostras de sangue e líquido pericárdico de 23 pacientes submetidos à cirurgia cardiovascular. RESULTADOS: A ECA purificada (MM = 140 kDa) libera angiotensina II, hidrolisa a bradicinina e o substrato Hip-His-Leu. Os parâmetros cinéticos k cat,(s-1) e k cat/Km (µM-1. s-1) foram respectivamente: Hip-His-Leu (1,14 e 7 x 10 -4), Abz-YRK(Dnp)P-OH (2,60 e 0,77), Abz-LFK(Dnp)-OH (2,77 e 0,36) e Abz-SDK(Dnp)P-OH (1,92 e 0,19). As atividades conversoras de angiotensina I (média ± DP) do líquido pericárdico e no soro foram, respectivamente, 3,16 ± 0,90 mU x mg -1x min-1 e 0,33 ± 0,11 mU x mg -1x min-1 . A diferença foi significativa entre os dois fluidos. CONCLUSÃO: Uma ECA com grande similaridade com a enzima somática foi isolada do fluido pericárdico humano. A atividade conversora de angiotensina I é maior no líquido pericárdico quando comparada com a atividade do soro. Esses dados constituem importante evidência do papel do líquido pericárdico no metabolismo de peptídeos ativos.


BACKGROUND: The characterization of an angiotensin-converting enzyme (ACE) in human pericardial fluid is relevant, considering its role in the angiotensin II release and thus, the role of the pericardium in cardiovascular homeostasis. OBJECTIVE: To isolate and characterize an ACE from human pericardial fluid and to compare the angiotensin I converting activities of the pericardial fluid with that of the serum in patients submitted to cardiovascular surgery. METHODS: The enzyme from human pericardial fluid was purified through chromatographic steps and characterized by polyacrylamide gel electrophoresis (SDS-PAGE), hydrolysis of angiotensin I, bradykinin, Hip-His-Leu and synthetic substrates with internal fluorescence suppression. Lisinopril was used as inhibitor. The ACE activity was measured in blood and pericardial fluid samples of 23 patients submitted to cardiovascular surgery. RESULTS: The purified ACE (MM = 140 kDa), releases angiotensin II, hydrolyses bradykinin and the Hip-His-Leu substrate. The kinetic parameters k cat,(s-1) and k cat/Km (µM-1. s-1) were, respectively: Hip-His-Leu (1.14 and 7 x 10 -4) ; Abz-YRK(Dnp)P-OH (2.60 and 0.77), Abz-LFK(Dnp)-OH (2.77 and 0.36) and Abz-SDK(Dnp)P-OH (1.92 and 0.19). The angiotensin I converting activities (mean ± SD) in the pericardial fluid and in blood, were, respectively: 3.16 ± 0.90 mU x mg -1x min-1 and 0.33 ± 0.11 mU x mg -1x min-1. The difference was significant between the two fluids. CONCLUSION: An ACE that bears great similarity with the somatic enzyme was isolated from human pericardial fluid. The angiotensin I converting activity is higher in the pericardial fluid when compared to the serum activity. These data are important evidence of the role of the pericardial fluid in the metabolism of active peptides.


Subject(s)
Humans , Cardiovascular Diseases , Peptidyl-Dipeptidase A , Pericardial Effusion/enzymology , Chromatography, Affinity , Cardiovascular Diseases/blood , Cardiovascular Diseases/enzymology , Cardiovascular Diseases/surgery , Electrophoresis, Polyacrylamide Gel , Fluorescence Resonance Energy Transfer , Hydrolysis , Peptidyl-Dipeptidase A/blood , Peptidyl-Dipeptidase A/isolation & purification
4.
Rev. Col. Bras. Cir ; 33(3): 151-155, jun. 2006. graf
Article in Portuguese | LILACS | ID: lil-448845

ABSTRACT

OBJETIVO: O objetivo do presente estudo é comparar o estresse cirúrgico por meio de dosagens hormonais (ACTH e cortisol) e de citocinas (IL-4, IL-10, TNF-a, e IFN-g), em pacientes que foram submetidos somente à operação da transição esofagogástrica com aqueles submetidos à operação da transição esofagogástrica associada à colecistectomia. MÉTODO: Foram estudados 31 pacientes , sendo 19 submetidos à operação da transição esofagogástrica e 12, que apresentavam associação de colelitíase, foram submetidos à colecistectomia e à operação da transição esofagogástrica. A coleta do sangue foi realizada no pré operatório e às 24, 48 e 72 horas no período pós-operatório. Foram realizadas as dosagens de hormônios (ACTH e cortisol) e citocinas (IL-4, IL-10, TNF-a e IFN-g). As variáveis contínuas foram submetidas a teste de normalidade. Foram aplicados testes não paramétricos Mann-Whitney, com significância estabelecida a p<0,05. RESULTADOS: Quanto ao ACTH, os valores foram maiores no grupo 1, às 24 e 48 horas. Na análise do cortisol, TNF-a, IFN-g, IL-4 e IL-10, verificou-se que os valores foram maiores no grupo 2, às 24 e 48 horas. Não se verificou diferença estatisticamente significativa entre os grupos em quaisquer dos tempos de análise. CONCLUSÕES: Com base neste material, pode-se inferir que associar a colecistectomia à operação da transição esofagogástrica não aumenta o stresse cirúrgico, mensurado pelo ACTH, cortisol e citocinas (TNF- a, INF-g, IL-4 e IL-10).


BACKGROUND: The aim of this study was to compare the surgical stress through hormones dosages, (ACTH and cortisol) and cytokines (IL-4, IL-10, TNF-alpha, and INF-gamma), who were operated on esophagogastric transition only with those submitted to both esophagogastric and cholecystectomy. METHODS: Thirty one patients were studied, 19 of these (group 1) were submitted to esophagogastric surgery only and 12 (group 2) had cholecystectomy procedure associated because of cholelithiasis. Blood was collected preoperatively and 24, 48, and 72 hours later at postoperative period in order to measure hormones (ACTH and cortisol) and cytokines (IL-4, IL-10, TNF-alpha, and INF-gamma). The continuous variables were submitted to normality tests. Nonparametric Mann-Whitney tests with significance established at p<0.05 were applied. RESULTS: ACTH values were higher in group 1 at 24 and 48 hours. Cortisol, IL-4, IL-10, TNF-alpha, and INF-gamma were higher in group 2, at 24 and 48 hours. There were no significant statistical differences between both groups in any of the analysis. CONCLUSION: Based on this material we can conclude that association of cholecystectomy or not with esophagogastric surgery does not increase surgical stress measured by ACTH, cortisol and cytokines (IL-4, IL-10, TNF-alpha, and INF-gamma).

5.
Arq. bras. cardiol ; 79(1): 10-19, July 2002. tab, graf
Article in Portuguese, English | LILACS | ID: lil-316162

ABSTRACT

OBJECTIVE: To assess, in myocardium specimens obtained from necropsies, the correlation between the concentration of hydroxyproline, measured with the photocolorimetric method, and the intensity of fibrosis, determined with the morphometric method. METHODS: Left ventricle myocardium samples were obtained from 45 patients who had undergone necropsy, some of them with a variety of cardiopathies and others without any heart disease. The concentrations of hydroxyproline were determined with the photocolorimetric method. In the histologic sections from each heart, the myocardial fibrosis was quantified by using a light microscope with an integrating ocular lens. RESULTS: A median of, respectively, 4.5 and 4.3 mug of hydroxyproline/mg of dry weight was found in fixed and nonfixed left ventricle myocardium fragments. A positive correlation occurred between the hydroxyproline concentrations and the intensity of fibrosis, both in the fixed (Sr=+0.25; p=0.099) and in the nonfixed (Sr=+0.32; p=0.03) specimens. CONCLUSION: The biochemical methodology was proven to be adequate, and manual morphometry was shown to have limitations that may interfere with the statistical significance of correlations for the estimate of fibrosis intensity in the human myocardium


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Collagen , Heart Ventricles , Hydroxyproline , Aged, 80 and over , Cadaver , Colorimetry , Fibrosis , Heart Ventricles , Photochemistry
6.
Rev. Inst. Med. Trop. Säo Paulo ; 42(1): 23-6, Jan.-Feb. 2000. tab
Article in English | LILACS | ID: lil-254825

ABSTRACT

Our objective was to compare food intake and nutritional status of Pemphigus Foliaceus patients (PG) on long term glucocorticoid therapy to a Control Group (CG). Fourteen PG female inpatients receiving prednisone (0.33 + or - 0.22mg/kg) for at least 12 months and twelve CG subjects were submitted to nutritional evaluation, including anthropometry, urinary creatinine determination and serum biochemical measurements, besides 48-h-based food intake records. Groups were compared by Chi-square, Mann-Whitney and "t" tests. PG patients and CG were paired, respectively, in relation to age (24.7 + or - 14.1 vs. 22.0 + or - 12.0 years), body mass index (25.8 + or - 6.4 vs. 24.0 + or - 5.6kg/m2), daily protein intake (132.9 + or - 49.8 vs. 95.2 + or - 58.9g), and serum albumin (median; range) (3.8; 3.5-4.1 vs. 3.8; 3.6-5.0g/dl). However, PG patients had lower height-creatinine index (64.8 + or - 17.6 vs. 90.1 + or - 33.4 percent), and higher daily energy (3080 + or - 1099 vs. 2187 + or - 702kcal) and carbohydrate (376.8 + or - 135.8 vs. 242.0 + or - 80.7g) intakes. Despite high food, protein and energy consumption, PG patients on long term glucocorticoid therapy had lower body muscle mass than controls, while showing high body fat stores. These findings are possibly related to combined metabolic effects of long term corticotherapy and inflammatory disease plus corticosteroid-induced increased appetite


Subject(s)
Female , Humans , Eating , Glucocorticoids/therapeutic use , Nutritional Status , Pemphigus/drug therapy , Prednisone/therapeutic use , Anthropometry , Appetite/drug effects , Body Mass Index , Case-Control Studies , Creatinine/urine , Energy Intake , Pemphigus/blood , Pemphigus/urine , Serum Albumin/analysis , Time Factors
7.
Rev. méd. Minas Gerais ; 6(3): 101-103, jul.-set. 1996. tab
Article in Portuguese | LILACS | ID: lil-594729

ABSTRACT

A pineal, pela secreção de melatonina (MLT), está envolvida no controle do eixo hipotálamo-hipófise-gônadas, regulação de ritmos biológicos e sensibilidade tecidual à insulina. O presente estudo foi realizado para verificar a influência da pineal sobre parâmetros metabólicos e bioquímica plasmática em ratos. Ratos wistar machos (180- 200g) foram mantidos em gaiolas metabólicas por 10 dias para avaliação diária da ingestão de água e alimento, volume urinário e peso corporal. Ao final deste período, os animais foram anestesiados e submetidos à pinealectomia (n=10) ou cirurgia fictícia (n=10) e coleta de sangue para dosagens de glicose, colesterol, triglicérides, proteínas totais e eletrólitos (Na+, K+, Ca++, Cl-). Após 20 e 50 dias da cirurgia, os animais foram recolocados em gaiolas metabólicas para observação por 10 dias e coleta de sangue. Os resultados obtidos demonstram nos animais pinealectomizados: a) aumento da ingestão de alimento e do volume urinário; b) maior ganho de peso após 60 dias da cirurgia; c) elevação plasmática de glicose e colesterol e redução das proteínas totais. Os resultados indicam que a pinealectomia induz alterações metabólicas nos ratos gerando quadro que se assemelha ao diabetes mellitus tipo II que, provavelmente, ocorre pela ausência de melatonina e conseqüente diminuição da sensibilidade celular à insulina.


Pineal gland, through secretion of melatonin (MLT), is envolved in the control of hypothalamus-hypophisis-gonadas axis, regulation of biological rhythms and tissue sensibility to insulin. The present work was made in order to verify pineal influence on metabolic and plasmatic conditions in rats. Wistar male rats were kept in metabolic cages for daily registration of food and water ingestion and urinary output, during 10 days. At the end of this period blood sample was collected for plasmatic determination of glucosis, cholesterol, triglicerides, total protein and electrolytes (Na, K, Ca, Cl). The animals were then pinealectomized (n=10) or sham operated (n=10), and observed again after 20 and 50 days of surgery, during 10 days. Results obtained show that pinealectomized animals present: a) greater food ingestion and urinary output; b) increased body weight after 60 days of surgery; c) increase in plasmatic glucosis and cholesterol, and decrease in total protein concentrations. Data obtained suggest that pinealectomy induces metabolic alterations similar to diabetes mellitus type II, which probably occurs because the absence of MLT reduces tissue sensibility to insulin.


Subject(s)
Animals , Male , Rats , Pineal Gland/surgery , Pineal Gland/metabolism , Melatonin , Rats, Wistar
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