Inhibition of salivary and pancreatic α-amylases by a pinhão coat (Araucaria angustifolia) extract rich in condensed tannin

Silva, Simone Mariano da; Koehnlein, Eloá Angélica; Bracht, Adelar; Castoldi, Rafael; Morais, Gutierrez Rodriguês de; Baesso, Mauro Luciano; Peralta, Rosely A.; Souza, Cristina Giatti Marques de; Sá‐Nakanishi, Anacharis Babeto de

doi:10.1016/j.foodres.2013.12.004

Cited by 81 publications

(71 citation statements)

References 27 publications

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“…This observation is probably the consequence of an indirect inhibition of triglyceride absorption via inhibition of pancreatic lipase. Taken together with the similar inhibition of glucose absorption after a starch load (Silva et al, 2014) these effects represent a potential anti-obesity activity, as suggested for other polyphenols or preparations rich in tannins.…”

Section: The Pinhão Coatsupporting

confidence: 60%

“…angustifolia seed coat tannins revealed a higher proportion of procyanidins to prodelphinidins when compared to the tannins of black wattle (Acacia mearnsii) (Silva et al, 2014). As other tannin rich extracts (Kusano et al, 2011;Manaharan et al, 2012;de Sales et al, 2012), those of the A. angustifolia seed coat strongly inhibited both human salivary and porcine pancreatic α-amylase (Silva et al, 2014). Inhibition of α-amylase resulted in delayed carbohydrate digestion and glucose absorption with attenuation of postprandial hyperglycemic excursions.…”

Section: The Pinhão Coatmentioning

confidence: 99%

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Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction

Peralta

Koehnlein

Oliveira

et al. 2016

Trends in Food Science & Technology

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Section: The Pinhão Coatsupporting

confidence: 60%

Section: The Pinhão Coatmentioning

confidence: 99%

Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction

Peralta

Koehnlein

Oliveira

et al. 2016

Trends in Food Science & Technology

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“…Inhibition of human salivary and porcine pancreatic α-amylase; reduction in post-prandial glycemic levels in rats [64] Antibacterial potential of A. angustifolia was investigated in a few studies. Santi-Gadelha et al [59] prepared an aqueous extract from araucaria seeds and then purified and characterized a lectin (N-acetyl-D-glucosamine-specific lectin) with antibacterial activity (150 μg/mL) against Gram-negative (Xanthomonas axonopodis pv.…”

Section: Plant Materials Study Model Biological Effects Referencementioning

confidence: 99%

“…This result is important because foods that present a low glycemic index are linked to the beneficial effects on preventing and controling chronic non-infectious diseases. In a recent study, Silva et al [64] also investigated the effects of a seed coat extract on glycemic levels of rats and activity of α-amylases (human salivary and porcine pancreatic). The seeds coat extract (250 mg/kg), rich in proanthocyanidins, was effective in diminishing the post-prandial glycemic levels in rats after starch administration.…”

Section: Actions On Metabolism and Central Nervous Systemmentioning

confidence: 99%

Chemical Constituents and Biological Activities of Araucaria angustifolia (Bertol.) O. Kuntze: A Review

Branco¹,

Rodrigues²,

Lima³

et al. 2016

J Org Inorg Chem

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Araucaria angustifolia is a tree that belongs to Araucariaceae family and it is mainly found in Southern Brazil. This plant has a notable therapeutical history in folk medicine holding great socioeconomic and environmental importance. Until now, some studies were conducted to assess its chemical composition, biological and pharmacological properties. The studies have shown that the bark, knot, needles (leaves), seeds and bracts (sterile seeds) contain high concentrations of active compounds and exhibit different biological effects. In the folk medicine the different parts of this plant are used to treat various types of illnesses, such as shingles, respiratory tract infections, sexually transmitted diseases and some types of wounds. Bearing this in mind, this review focuses on all currently chemical and biological effects already reported for A. angustifolia and provide a novel perspective and useful information for future research.

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“…O. Ktze. para alimentación, que se produce en el sur y sudeste del Brasil (Silva et al 2014).Las semillas de A. angustifolia han contribuido a la economía local en algunas regiones de Brasil. Datos del IBGE (2013) informan que en 2013 se vendieron en el país 8.889 toneladas; de estas, 8.608 toneladas fueron comercializada en el sur y 281 toneladas en el sudeste.…”

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Perfil lignoídico del tegumento de semillas de Araucaria angustifolia

et al. 2016

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SUMMARYThe aim of this research was to quantify and identify the types of lignin and characterize its functionalization based on apparent physical resistance in each seed coat layers of Araucaria angustifolia. Each seed layer (exotesta, mesotesta and endotesta) was milled, homogenized and pre-extracted with solvents: cyclohexane, ethyl acetate and methanol for quantification of lignin. Pre-treatment with NaOH 1% was also performed in each layer of the seed for lignin quantification and for infrared spectroscopy. The lignin content obtained in the testa was 32.43 % for the three layers. After alkaline treatment, the lignin content was 31.52 % in exotesta, 16.88 % in mesotesta and 15.48 % in endotesta. Dioxane lignin was isolated from the seed coat and reduced with NaHB 4 . Infrared spectra (FTIR) were obtained from the dioxane lignin, reduced dioxane lignin and alkaline-treated Klason lignin of each layer. Microscopic analyses of the in natura exotesta and mesotesta layers from the seed coat were performed through histochemical test (Wiesner) and fluorescence microscopy. Infrared analyses made possible observation of aldehyde terminations in dioxane lignin and propose the structural profile of Klason lignin in different layers. Fluorescence microscopic analyses allowed identification of highly lignified macrosclereids in exotesta.Key words: lignin, nut, infrared, testa. RESUMENEl objetivo de esta investigación fue identificar y cuantificar los tipos de lignina, y caracterizar su función según la resistencia física aparente de cada capa de la testa de la semilla de Araucaria angustifolia. Cada capa de la semilla (exotesta, mesotesta e endotesta) se molió, homogeneizó y sometió a un ciclo de pre-extracción con solventes (ciclohexano, acetato de etilo y metanol) para preparar el material para cuantificar la lignina. También se realizó en cada capa de la semilla un pre-tratamiento con NaOH 1 % para cuantificar la lignina y para aplicar espectroscopía infrarroja. El contenido de lignina en la testa fue 32,43 % para las tres capas juntas. Después del tratamiento alcalino, el contenido de lignina fue de 31,52 % en exotesta, 16,88 % en mesotesta y 15,32 % en endotesta. Lignina dioxano se aisló del tegumento de la semilla y la misma se redujo químicamente con NaHB 4 . Los espectros infrarrojos se registraron a partir de lignina dioxano, lignina dioxano reducida y de lignina de Klason de cada capa con tratamiento alcalino. Se realizaron análisis microscópicos de las capas de exotesta y mesotesta de la testa de la semilla al natural, por prueba histoquímica (prueba Wiesner) y por microscopía de fluorescencia. El análisis infrarrojo permitió observar la presencia de terminales aldehído en lignina dioxano y trazar el perfil estructural de las ligninas de Klason en capas diferentes. En el análisis microscópico con fluorescencia se identificó en la exotesta la presencia de macroesclereidas altamente lignificadas.Palabras clave: lignina, piñón, infrarrojo, testa. INTRODUCCIÓNUna gran parte de las semillas forestales en Brasil se...

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Inhibition of salivary and pancreatic α-amylases by a pinhão coat (Araucaria angustifolia) extract rich in condensed tannin

Cited by 81 publications

References 27 publications

Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction

Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction

Chemical Constituents and Biological Activities of Araucaria angustifolia (Bertol.) O. Kuntze: A Review

Perfil lignoídico del tegumento de semillas de Araucaria angustifolia

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