scholarly journals Chemical Composition Analysis Using HPLC-UV/GC-MS and Inhibitory Activity of Different Nigella sativa Fractions on Pancreatic α-Amylase and Intestinal Glucose Absorption

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Mohammed Dalli ◽  
Nour Elhouda Daoudi ◽  
Salah-eddine Azizi ◽  
Hind Benouda ◽  
Mohamed Bnouham ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Nigella Sativa ◽  
Inhibitory Effect ◽  
Glucose Absorption ◽  
Hexane Fraction ◽  
Composition Analysis ◽  
Aqueous Fraction ◽  
Intestinal Glucose Absorption

Nigella sativa (NS) is a well-known plant for its various benefits and multiuse in traditional medicine. This study is aimed at investigating the chemical composition of the different NS fractions by using GC-MS for the esterified fatty acids or HPLC-UV for organic fraction and at evaluating the inhibitory effect on pancreatic α-amylase (in vitro, in vivo) and intestinal glucose absorption. Among all the investigated fractions, it was shown that they are rich with different molecules of great interest. The n-hexane fraction was characterized by the presence of linoleic acid (44.65%), palmitic acid (16.32%), stearic acid (14.60%), and thymoquinone (8.7%), while among the identified peaks in EtOH fraction we found catechin (89.03 mg/100 g DW), rutin (6.46 mg/100 g DW), and kaempferol (0.032 mg/100 g DW). The MeOH fraction was distinguished with the presence of gallic acid (19.91 mg/100 g DW), catechin (13.79 mg/100 g DW), and rutin (21.07 mg/100 g DW). Finally, the aqueous fraction was marked by the existence of different molecules; among them, we mention salicylic acid (32.26 mg/100 g DW), rutin (21.46 mg/100 g DW), and vanillic acid (3.81 mg/100 g DW). Concerning the inhibitory effect on pancreatic α-amylase, it was found that in the in vitro study, the best IC50 registered were those of EtOH (0.25 mg/ml), MeOH (0.10 mg/ml), aqueous (0.031 mg/ml), and n-hexane fraction (0.76 mg/ml), while in the in vivo study an important inhibition of α-amylase in normal and diabetic rats was observed. Finally, the percentage of intestinal glucose absorption was evaluated for all tested extracts and it was ranging from 24.82 to 60.12%. The results of the present study showed that the NS seed fractions exert an interesting inhibitory effect of α-amylase and intestinal glucose absorption activity which could be associated with the existent bioactive compounds. Indeed, these compounds can be used as antidiabetic agents because of their nontoxic effect and high efficacy.

scholarly journals Inhibition of α-Glucosidase, Intestinal Glucose Absorption, and Antidiabetic Properties by Caralluma europaea

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Hayat Ouassou ◽  
Touda Zahidi ◽  
Saliha Bouknana ◽  
Mohamed Bouhrim ◽  
Hassane Mekhfi ◽  
...  
Keyword(s):  
Ethyl Acetate Fraction ◽  
Inhibitory Effect ◽  
Tolerance Test ◽  
Glucose Absorption ◽  
Significant Inhibition ◽  
Oral Glucose ◽  
Glucosidase Activity ◽  
Intestinal Glucose Absorption

Many medicinal plants around the world are used for therapeutic purposes against several diseases, including diabetes mellitus. Due to their composition of natural substances that are effective and do not represent side effects for users, unlike synthetic drugs, in this study, we investigated the inhibitory effect of Caralluma europaea (CE) on α-glucosidase activity in vitro; then the kinetics of the enzyme were studied with increasing concentrations of sucrose in order to determine the inhibition type of the enzyme. In addition, this effect of Caralluma europaea (CE) was confirmed in vivo using rats as an experimental animal model. Among the five fractions of CE, only the ethyl acetate fraction of C. europaea (EACe) induced a significant inhibition of α-glucosidase and its inhibition mode was competitive. The in vivo studies were conducted on mice and rats using glucose and sucrose as a substrate, respectively, to determine the oral glucose tolerance test (OGTT). The results obtained showed that the EACe and the aqueous extract of C. europaea (AECe) have significantly reduced the postprandial hyperglycemia after sucrose and glucose loading in normal and diabetic rats. AECe, also, significantly decreased intestinal glucose absorption, in situ. The results obtained showed that Caralluma europaea has a significant antihyperglycemic activity, which could be due to the inhibition of α-glucosidase activity and enteric absorption of glucose.

The inhibitory effect of capsaicin on intestinal glucose absorption in vitro

1979 ◽  
Vol 4 (5) ◽  
pp. 399-406 ◽  
Author(s):  
Yongyot monsereenusorn ◽  
Thirayudth Glinsukon
Keyword(s):  
Inhibitory Effect ◽  
Glucose Absorption ◽  
Intestinal Glucose Absorption

scholarly journals Physicochemical Characteristics Identification and Secondary Metabolite Analysis of Solid Herbal Waste as Source of Feed Rich Fiber and Supplement for Ruminants

2016 ◽  
Vol 18 (2) ◽  
pp. 75
Author(s):  
Arif Nindyo Kisworo ◽  
Ali Agus ◽  
Kustantinah Kustantinah ◽  
Bambang Suwignyo
Keyword(s):  
Chemical Composition ◽  
Secondary Metabolites ◽  
Lignin Content ◽  
Physicochemical Characteristics ◽  
Composition Analysis ◽  
Physical Analysis ◽  
Feed Supplements ◽  
Fermentation Parameters

A study was conducted to determine the potency, physicochemical characteristics, and analyzed the secondary metabolites content of solid herbal waste (SWH) as a substitute source of feed rich fibre and feed supplements in ruminants. The first study includes an analysis of production potential, physical analysis, and chemical composition analysis of SWH. The second study was an analysis of secondary metabolites content of SWH. The results showed that SWH volume reached 6-8 m3/day or 4020-5360 kg/day, the chemical composition of herbal solid waste was similar to king grass with high lignin content (17.53%). SWH containing total phenols, flavonoids, tannins, saponins , alkaloids and essential oils which generally have antimicrobial activity. According to the potential availability, chemical composition and secondary metabolites content of SWH, it can be used as an alternative for substitute of feed rich fiber or feed supplements with attention to the content of secondary metabolites that can affect the process of fermentation and digestibility in the rumen. Further in vitro and in vivo research ore needed to determine the effect of SWH on rumen fermentation parameters and its application in the ration in ruminant livestock.

scholarly journals Annona muricata L. extract decreases intestinal glucose absorption and improves glucose tolerance in normal and diabetic rats

2021 ◽  
Vol 10 (3) ◽  
pp. 359-366
Author(s):  
Ana María Guevara-Vásquez ◽  
Julio Víctor Campos-Florián ◽  
Jesús Haydee Dávila-Castillo
Keyword(s):  
Aqueous Extract ◽  
Leaf Extract ◽  
Glucose Absorption ◽  
Diabetic Rats ◽  
Annona Muricata ◽  
Antihyperglycemic Activity ◽  
Aqueous Leaf Extract ◽  
Intestinal Glucose Absorption

Introduction: Poorly controlled hyperglycemia causes numerous health complications. Postprandial hyperglycemia is an important indicator of diabetic status. The aim of this research was to evaluate the effect of Annona muricata L. extract on the in vitro intestinal glucose absorption in diabetic rats and in vivo antihyperglycemic activity in both normal and diabetic rats. Methods: Phytochemical screening of the aqueous extract from the leaves of A. muricata was carried out. Albino rats were randomly assigned into normal and diabetic groups. Each group was divided into three subgroups: control (vehicle), experimental (A. muricata), and standard (Metformin) groups, to determine antihyperglycemic activity at different times after glucose overload. The everted intestinal sac technique was used to study intestinal glucose absorption in diabetic rats. Results: Aqueous leaf extract of Peruvian A. muricata exhibited statistically significant (P < 0.05) in vivo antihyperglycemic activity in both normal and diabetic rats when compared to the control group. The magnitude of the effect was similar to metformin treatment. Moreover, the aqueous leaf extract of A. muricata significantly diminished in vitro intestinal glucose absorption, with a magnitude similar to metformin treatment. Phytochemical analysis of the aqueous extract revealed the presence of tannins, flavonoids, alkaloids, and leucoanthocyanidins, among others. Conclusion: This study reveals that A. muricata aqueous extract is able to reduce in vitro intestinal glucose absorption and improve oral glucose tolerance in rats.

The inhibitory effect of capsaicin on intestinal glucose absorption in vitro

1979 ◽  
Vol 4 (5) ◽  
pp. 393-397 ◽  
Author(s):  
Yongyot Monsereenusorn ◽  
Thirayudth Glinsukon
Keyword(s):  
Inhibitory Effect ◽  
Glucose Absorption ◽  
Intestinal Glucose Absorption

scholarly journals Empagliflozin, Beyond Glucose Reduction. The Unanticipated and Welcomed Cardioprotective Results. Switching the Heart at Four Levels: Energetic, Anatomical, Functional, and Neuro-Hormonal

2021 ◽  
Vol 9 (6) ◽  
Author(s):  
Morales-Villegas Enrique ◽  
Castillo-Núñez Yulino ◽  
Castillo-Barrios Gilberto
Keyword(s):  
Experimental Studies ◽  
Cardiovascular Death ◽  
Glucose Absorption ◽  
Left Ventricular ◽  
Myocardial Remodeling ◽  
Sodium Glucose Cotransporter ◽  
Intestinal Glucose Absorption ◽  
Four Levels

Sodium-glucose cotransporter 2 inhibitors (SGLT2i) like empagliflozin, canagliflozin, dapagliflozin, and ertugliflozin, and sotagliflozin (both a sodium-glucose cotransporter 1 inhibitor [SGLT1i] and SGLT2i), are drugs that inhibit the action of sodium-glucose cotransporters in the proximal renal tubule and/or the intestine. Therefore, causing natriuresis, glucosuria, and reduced intestinal glucose absorption. Besides this mechanism of action, which determines glycemia reduction, there are multiple extra-glycemic mechanisms in extensive research in humans in-vivo, which, beyond in-vitro or experimental studies, is dissecting the mechanisms explaining the initially unanticipated and ultimately incredibly significant and welcomed cardiac and nephroprotective results of these drugs. This article centers on the cardioprotective effects of empagliflozin, namely, a reduction of cardiovascular death, nonfatal myocardial infarction, nonfatal stroke, and hospitalization for heart failure, among others. These effects were demonstrated in the EMPA-REG and EMPEROR-Reduced clinical outcome trials, which will be initially summarized to later frame them in the results of the mechanistic trials EMPA-HEART, EMPIRE-HF (including sub-studies), EMPA-TROPISM, and “EMPA-PIG.” The mechanistic trials showed favorable changes in the left ventricular mass index, left ventricular end-systolic and end-diastolic volumes, extracellular and intravascular volumes, glomerular filtration rate, myocardial remodeling, among others. These were investigator-initiated studies to go beyond in-vitro and experimental evidence. The results and analysis allow us to understand myocardial energy remodeling as an intrinsic myocardial mechanism that underlies anatomical, functional, and neurohormonal myocardial remodeling. Together with other systemic actions, predominantly renal (not discussed in this article), contribute significantly to this drug's clinical benefit.

The Effect of Barbituric Acid Derivatives on Platelet Function in Vitro and in Vivo

1973 ◽  
Vol 30 (02) ◽  
pp. 315-326
Author(s):  
J. Heinz Joist ◽  
Jean-Pierre Cazenave ◽  
J. Fraser Mustard
Keyword(s):  
Platelet Aggregation ◽  
Platelet Function ◽  
Barbituric Acid ◽  
Platelet Rich Plasma ◽  
Inhibitory Effect ◽  
Primary Response ◽  
Sodium Pentobarbital ◽  
Barbituric Acid Derivatives

SummarySodium pentobarbital (SPB) and three other barbituric acid derivatives were found to inhibit platelet function in vitro. SPB had no effect on the primary response to ADP of platelets in platelet-rich plasma (PRP) or washed platelets but inhibited secondary aggregation induced by ADP in human PRP. The drug inhibited both phases of aggregation induced by epinephrine. SPB suppressed aggregation and the release reaction induced by collagen or low concentrations of thrombin, and platelet adherence to collagen-coated glass tubes. The inhibition by SPB of platelet aggregation was readily reversible and isotopically labeled SPB did not become firmly bound to platelets. No inhibitory effect on platelet aggregation induced by ADP, collagen, or thrombin could be detected in PRP obtained from rabbits after induction of SPB-anesthesia.

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