Antinutritional effects and ecological significance of dietary condensed tannins may not be due to binding and inhibiting digestive enzymes

1988 ◽  
Vol 14 (6) ◽  
pp. 1455-1465 ◽  
Author(s):  
Harold J. Blytt ◽  
Timothy K. Guscar ◽  
Larry G. Butler
Keyword(s):  
Condensed Tannins ◽  
Digestive Enzymes ◽  
Ecological Significance

scholarly journals Effects of condensed tannins prepared from leaves of fodder plants on digestive enzymes in vitro and in the intestine of rats

1988 ◽  
Vol 60 (2) ◽  
pp. 275-285 ◽  
Author(s):  
T. Horigome ◽  
R. Kumar ◽  
K. Okamoto
Keyword(s):  
Condensed Tannins ◽  
Digestive Enzymes ◽  
Black Locust ◽  
Inhibitory Effect ◽  
Middle Part ◽  
Degree Of Polymerization ◽  
Molecular Forms ◽  
Reynoutria Japonica ◽  
Fodder Plants

1. Of the nineteen plants screened, six were found to contain large quantities of condensed tannins. Black locust (Robinia pseudo-Acacia), bush clover (Lespedeza bicolor), wistaria (Wistaria floribunda) and Japanese knotgrass (Reynoutria japonica) were used for the present experiment. Tannins of the investigated plants were fractionated into three or four molecular forms, according to the degree of polymerization, by chromatography on a column of Sephadex LH-20.2. The protein-precipitating capacity of the fractionated tannins increased with the increase in degree of polymerization. The inhibitory effect of tannins on trypsin (EC 3.4.21.4), a-amylase (EC 3.2.1.1) and lipase (EC 3.1.1.3) activities in vitro also increased with the increase in degree of polymerization. The digestion of tannin-bovine serum albumin complex by trypsin was related to the degree of polymerization of tannins complexed.3. Inclusion of black locust tannins in the diet (10 g/kg) depressed the activities of trypsin and α-amylase in the upper, middle and lower parts of the intestine of the rats, but the lipase activity was increased in the middle part and remained unaffected in the upper and lower parts. It is presumed that the tannins have little affinity for lipase.4. Digestion trials, when the microflora level of the alimentary canal of rats was reduced by dietary antibiotic treatment, revealed that the inclusion of tannins in the diet (20 g/kg) depressed the digestibilities of proximate constituents, except crude fat, and increased faecal bile acid excretion.

A comparison of solvents for extraction of condensed tannins in tree leaves

2002 ◽  
Vol 2002 ◽  
pp. 134-134
Author(s):  
CM Capetillo Leal ◽  
R. Reyes Ramírez ◽  
CA Sandoval-Castro ◽  
D. Camacho Morfin
Keyword(s):  
Protein Interaction ◽  
Condensed Tannins ◽  
Protein Precipitation ◽  
Ecological Significance ◽  
Plant Leaves ◽  
Tree Leaves ◽  
Biological Assays ◽  
Litter Decay ◽  
The Relationship ◽  
Extracting Agents

The occurrence of tannins in plant leaves has a widely known ecological significance in terms of both nutritional constraint for animals and litter decay in the soil. However, there is no single protocol for extracting tannins for their subsequent quantification. The use of acetone has the advantage of inhibiting the polyphenol-protein interaction (Hagerman and Robbins, 1987), but becomes an disadvantage when assaying the protein precipitation capacity of the extract in biological assays (Hagerman and Butler, 1991). The objective of the present work was to compare tannin extracting agents and to assess the relationship arising between different solvents.

Inhibitory effects of bioaccessible anthocyanins and procyanidins from apple, red grape, cinnamon on α-amylase, α-glucosidase and lipase

2020 ◽  
pp. 1-9
Author(s):  
Pınar Ercan ◽  
Sedef Nehir El
Keyword(s):  
Inhibitory Activity ◽  
Digestive Enzymes ◽  
Positive Control ◽  
Anthocyanin Content ◽  
Inhibitory Effects ◽  
Total Anthocyanin ◽  
Total Anthocyanin Content ◽  
Before And After ◽  
Red Grape

Abstract. The goals of this study were to determine and evaluate the bioaccessibility of total anthocyanin and procyanidin in apple (Amasya, Malus communis), red grape (Papazkarası, Vitis vinifera) and cinnamon (Cassia, Cinnamomum) using an in vitro static digestion system based on human gastrointestinal physiologically relevant conditions. Also, in vitro inhibitory effects of these foods on lipid (lipase) and carbohydrate digestive enzymes (α-amylase and α-glucosidase) were performed with before and after digested samples using acarbose and methylumbelliferyl oleate (4MUO) as the positive control. While the highest total anthocyanin content was found in red grape (164 ± 2.51 mg/100 g), the highest procyanidin content was found in cinnamon (6432 ± 177.31 mg/100 g) (p < 0.05). The anthocyanin bioaccessibilities were found as 10.2 ± 1%, 8.23 ± 0.64%, and 8.73 ± 0.70% in apple, red grape, and cinnamon, respectively. The procyanidin bioaccessibilities of apple, red grape, and cinnamon were found as 17.57 ± 0.71%, 14.08 ± 0.74% and 18.75 ± 1.49%, respectively. The analyzed apple, red grape and cinnamon showed the inhibitory activity against α-glucosidase (IC50 544 ± 21.94, 445 ± 15.67, 1592 ± 17.58 μg/mL, respectively), α-amylase (IC50 38.4 ± 7.26, 56.1 ± 3.60, 3.54 ± 0.86 μg/mL, respectively), and lipase (IC50 52.7 ± 2.05, 581 ± 54.14, 49.6 ± 2.72 μg/mL), respectively. According to our results apple, red grape and cinnamon have potential to inhibit of lipase, α-amylase and α-glucosidase digestive enzymes.

ACTIVITY OF DIGESTIVE ENZYMES IN DUODENAL CHYMUS AND BLOOD IN BROILERS OF PARENTAL LINES AND THE MEAT CROSS DEPENDING ON DIETARY BIOACTIVE ADDITIVES

2017 ◽  
Vol 52 (6) ◽  
pp. 1226-1233
Author(s):  
V.I. Fisinin ◽  
◽  
I.A. Egorov ◽  
V.G. Vertiprakhov ◽  
A.A. Grozina ◽  
...  
Keyword(s):  
Digestive Enzymes ◽  
Parental Lines

Enterogastric Reflux: an Uncommon Diagnosis Analyzed by Hepatobiliary Imaging

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Peter Wang
Keyword(s):  
Abdominal Pain ◽  
Digestive Enzymes ◽  
Gallbladder Disease ◽  
Hepatobiliary Scintigraphy ◽  
Hepatobiliary Imaging ◽  
Upper Gi ◽  
Gi Symptoms ◽  
Upper Abdominal ◽  
Enterogastric Reflux

Enterogastric reflux (EGR) is the reflux of bile and digestive enzymes from the small bowel into the stomach. While it is a normal physiologic process in small amounts, excessive reflux and chronic EGR can cause upper GI symptoms often mimicking more common diseases such as gallbladder disease and GERD that often leads to its underdiagnosis. Identifying EGR is significant as it has been associated with the development of gastroesophogeal pathology including gastritis, esophagitis, ulcers, and mucosal metaplasia. This article presents a 22-year-old male with enterogastric reflux causing upper abdominal pain and will discuss the role of hepatobiliary scintigraphy in its diagnosis.

ECOLOGICAL SIGNIFICANCE OF PHEROMONES

2020 ◽  
Vol 6 (2) ◽  
pp. 64-68
Author(s):  
Nondira Khondhodjayeva ◽  
◽  
Nurmamat Rajabov ◽  
Keyword(s):  
Biological Significance ◽  
Ecological Significance ◽  
Definition Of

This article reveals the essence of the concept of "pheromones" and their biological significance. In the article variants of their application in agriculture for struggle against insects-pests are presented. The definition of term and classification of pheromones and their types are given: feromons of insects, feromons of fish, feromons of vertebrates, feromons of humans, fermons of plants, sexual feromons, anxiety feromons, trace feromons, epidemic feromons and their functions and significance for the representative's organism and the environment as a whole

PALAEO-ECOLOGICAL SIGNIFICANCE OF PALAEOCENE CALCAREOUS ALGAE FROM THE CAUVERY BASIN, INDIA

1970 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Kishore
Keyword(s):  
Key Words ◽  
Tidal Flat ◽  
South India ◽  
Distribution Patterns ◽  
Calcareous Algae ◽  
Ecological Significance ◽  
Cauvery Basin ◽  
Ecological Information

Palaeocene limestone of the Ninniyur Formation of the Cauvery Basin contains abundant well-preserved calcareous algae. These various types of calcareous algal seem to be controlled by the characteristics of each type environments in which they developed and thus they provide useful palaeo-ecological information of the Ninniyur Formation. The distribution patterns of these groups of calcareous algae, extending from tidal flat to reefal environments have been observed in the Palaeocene of the Ninniyur Formation, Cauvery Basin South India. Key words: Ninniyur formation, Calcareous algae, Palaeoecology. Ecoprint Vol.11(1) 2004.

Effect of resistance selection on activities of detoxification enzymes and digestive enzymes in Plutella xylostella

2014 ◽  
Vol 39 (5) ◽  
pp. 529-533
Author(s):  
Liu YANG ◽  
Shuang-qing LIU ◽  
Li-jun GONG ◽  
Hui-chao ZHANG ◽  
Ji-Cai TAN ◽  
...  
Keyword(s):  
Plutella Xylostella ◽  
Digestive Enzymes ◽  
Detoxification Enzymes ◽  
Resistance Selection
Sign in / Sign up

Export Citation Format

Share Document