Abstract:
BACKGROUND:α-glucosidase inhibitors regulate postprandial hyperglycemia (PPHG) by impeding the rate of carbohydrate digestion in the small intestine and thereby hampering the diet associated acute glucose excursion. PPHG is a major risk factor for diabetic vascular complications leading to disabilities and mortality in diabetics. Cinnamomum zeylanicum, a spice, has been used in traditional medicine for treating diabetes. In this study we have evaluated the α-glucosidase inhibitory potential of cinnamon extract to control postprandial blood glucose level in maltose, sucrose loaded STZ induced diabetic rats. METHODS:The methanol extract of cinnamon bark was prepared by Soxhlet extraction. Phytochemical analysis was performed to find the major class of compounds present in the extract. The inhibitory effect of cinnamon extract on yeast α-glucosidase and rat-intestinal α-glucosidase was determined in vitro and the kinetics of enzyme inhibition was studied. Dialysis experiment was performed to find the nature of the inhibition. Normal male Albino wistar rats and STZ induced diabetic rats were treated with cinnamon extract to find the effect of cinnamon on postprandial hyperglycemia after carbohydrate loading. RESULTS:Phytochemical analysis of the methanol extract displayed the presence of tannins, flavonoids, glycosides, terpenoids, coumarins and anthraquinones. In vitro studies had indicated dose-dependent inhibitory activity of cinnamon extract against yeast α-glucosidase with the IC 50 value of 5.83 μg/ml and mammalian α-glucosidase with IC 50 value of 670 μg/ml. Enzyme kinetics data fit to LB plot pointed out competitive mode of inhibition and the membrane dialysis experiment revealed reversible nature of inhibition. In vivo animal experiments are indicative of ameliorated postprandial hyperglycemia as the oral intake of the cinnamon extract (300 mg/kg body wt.) significantly dampened the postprandial hyperglycemia by 78.2% and 52.0% in maltose and sucrose loaded STZ induced diabetic rats respectively, compared to the control. On the other hand, in rats that received glucose and cinnamon extract, postprandial hyperglycemia was not effectively suppressed, which indicates that the observed postprandial glycemic amelioration is majorly due to α-glucosidase inhibition. CONCLUSIONS:The current study demonstrates one of the mechanisms in which cinnamon bark extract effectively inhibits α-glucosidase leading to suppression of postprandial hyperglycemia in STZ induced diabetic rats loaded with maltose, sucrose. This bark extract shows competitive, reversible inhibition on α-glucosidase enzyme. Cinnamon extract could be used as a potential nutraceutical agent for treating postprandial hyperglycemia. In future, specific inhibitor has to be isolated from the crude extract, characterized and therapeutically exploited.
journal_name
Nutr Metab (Lond)journal_title
Nutrition & metabolismauthors
Mohamed Sham Shihabudeen H,Hansi Priscilla D,Thirumurugan Kdoi
10.1186/1743-7075-8-46subject
Has Abstractpub_date
2011-06-29 00:00:00pages
46issue
1issn
1743-7075pii
1743-7075-8-46journal_volume
8pub_type
杂志文章abstract:BACKGROUND:Diet-induced hepatic steatosis is highly associated with nonalcoholic fatty liver disease, which is related to the development of metabolic syndrome. While advanced stage nonalcoholic hepatic steatosis and steatohepatitis (NASH) result ultimately in fibrosis and cirrhosis, the molecular basis for lipid dropl...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-015-0012-7
更新日期:2015-05-20 00:00:00
abstract:: Drug-drug interactions have become an important issue in health care. It is now realized that many drug-drug interactions can be explained by alterations in the metabolic enzymes that are present in the liver and other extra-hepatic tissues. Many of the major pharmacokinetic interactions between drugs are due to hepa...
journal_title:Nutrition & metabolism
pub_type: 杂志文章,收录出版
doi:10.1186/1743-7075-5-27
更新日期:2008-10-18 00:00:00
abstract:BACKGROUND:Obesity is a major risk factor for insulin resistance, type 2 diabetes, and stroke. Flavonoids are effective antioxidants that protect against these chronic diseases. In this study, we evaluated the effects of sudachitin, a polymethoxylated flavonoid found in the skin of the Citrus sudachi fruit, on glucose,...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-11-32
更新日期:2014-07-04 00:00:00
abstract::We studied the regulation of brain acetyl CoA carboxylase (ACC) activity during food deprivation and under the influence of hormones of glucose homeostasis: glucagon and insulin. Mice were deprived of food and water for time periods of 1, 3, 6, 9, 12 and 24 hours and were then allowed to re-feed for 5, 30 and 60 minut...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-3-15
更新日期:2006-02-16 00:00:00
abstract::Nutrition & Metabolism has grown considerably in the ten years since its first article was published. To see how papers published in the journal had an impact we have identified some of the most popular articles in order to measure their influence, observe which fields are important to our readers, and try to explain ...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-11-13
更新日期:2014-03-19 00:00:00
abstract:Background:The resting metabolic rate (RMR) decrease, observed after an obesity reduction therapy is a determinant of a short-time weight regain. Thus, the objective of this study was to evaluate changes in RMR, and the associated hormonal alterations in obese patients with a very low-calorie ketogenic (VLCK)-diet indu...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-018-0249-z
更新日期:2018-02-17 00:00:00
abstract:BACKGROUND:Recent data suggest that an increased level of high-density lipoprotein cholesterol (HDL-C) is not causally protective against heart disease, shifting focus to other sub-phenotypes of HDL. Prior work on the effects of dietary intakes has focused largely on HDL-C. The goal of this study was to identify the di...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-11-44
更新日期:2014-09-15 00:00:00
abstract:Background:We previously reported on the anti-obesogenic and anti-inflammatory effects associated with n-3 long-chain polyunsaturated fatty acids (LCPUFA) in our diet-induced obesity (DIO) mouse model. Two isocaloric high-fat diets (HFDs; 48 kJ% fat), HFD (HF) and n-3 LCPUFA-enriched HFD (HF/n-3), and a control diet (C...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-018-0291-x
更新日期:2018-09-26 00:00:00
abstract:BACKGROUND:To study the effects of a pre-germinated brown rice diet (PR) on diabetic neuropathy in streptozotocin (STZ)-induced diabetic rats. METHODS:The effects of a PR diet on diabetic neuropathy in STZ-induced diabetic rats were evaluated and compared with those fed brown rice (BR) or white rice (WR) diets with re...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-4-25
更新日期:2007-11-23 00:00:00
abstract:BACKGROUND:Reducing dietary energy density has proven to be an effective strategy to reduce energy intakes and promote weight control. This effect appears most robust when a low energy dense preload is consumed before meals. Yet, much discussion continues regarding the optimal form of a preload. The purpose of the pres...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-8-8
更新日期:2011-02-02 00:00:00
abstract:BACKGROUND:Recent data from this laboratory suggest that components of dairy foods may serve as activators of SIRT1 (Silent Information Regulator Transcript 1), and thereby participate in regulation of glucose and lipid metabolism. In this study, an ex-vivo/in-vitro approach was used to examine the integrated effects o...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-8-91
更新日期:2011-12-20 00:00:00
abstract:PURPOSE:To determine the influence of menstrual irregularity, oral contraceptive use and other factors on bone mineral density (BMD) and bone size at different skeletal sites in 135 college-aged fit women. METHODS:Menstrual history, oral contraceptive use, exercise history, and nutritional factors including calcium, c...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-4-17
更新日期:2007-08-06 00:00:00
abstract:BACKGROUND:Holotranscobalamin, cobalamin-saturated transcobalamin, is the minor fraction of circulating cobalamin (vitamin B12), which is available for cellular uptake and hence is physiologically relevant. Currently, no method allows simple, direct quantification of holotranscobalamin. We now report on the identificat...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-3-3
更新日期:2006-01-04 00:00:00
abstract::Breast cancer is the most prevalent cancer in American women. Dietary factors are thought to have a strong influence on breast cancer incidence. This study utilized a meal-feeding protocol with female Sprague-Dawley rats to evaluate effects of two ratios of carbohydrate:protein on promotion and early progression of br...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-7-1
更新日期:2010-01-10 00:00:00
abstract::OBJECTIVE: To compare the effects of isocaloric, energy-restricted very low-carbohydrate ketogenic (VLCK) and low-fat (LF) diets on weight loss, body composition, trunk fat mass, and resting energy expenditure (REE) in overweight/obese men and women. DESIGN: Randomized, balanced, two diet period clinical intervention ...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-1-13
更新日期:2004-11-08 00:00:00
abstract:BACKGROUND:Elevated homocysteine is a cardiovascular risk factor in hyperlipidemia. Transsulfuration pathway provides an endogenous pathway for homocysteine conversion to antioxidant glutathione (GSH). Salvianolic acid A (Sal A) contains two molecules of caffeic acid and one molecule of danshensu that is capable of enh...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-10-68
更新日期:2013-12-06 00:00:00
abstract:BACKGROUND:Currently, there is a lack of studies examining the effects of adenosine-5'-triphosphate (ATP) supplementation utilizing a long-term, periodized resistance-training program (RT) in resistance-trained populations. Therefore, we investigated the effects of 12 weeks of 400 mg per day of oral ATP on muscular ada...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-10-57
更新日期:2013-09-22 00:00:00
abstract:BACKGROUND:The conjugated linoleic acid (CLA) content of beef can be increased by supplementing appropriate beef cattle diets with vegetable oil or oil seed. Yet the effect of consumption of such beef on adipose tissue characteristics is unclear, thus the study was conducted to compare adipose tissue responses of rats ...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-6-19
更新日期:2009-04-22 00:00:00
abstract:Background:Visceral adipose tissue (VAT) area is a strong predictor of obesity-related cardiometabolic alterations, but its measurement is costly, time consuming and, in some cases, involves radiation exposure. Glutamate, a by-product of branched-chain-amino-acid (BCAA) catabolism, has been shown to be increased in vis...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-018-0316-5
更新日期:2018-11-06 00:00:00
abstract:Background:Caloric restriction since birth changes glucose metabolism by the liver in overnight-fasted rats to a fed-like pattern, in which glucose output is large but gluconeogenesis is negligible. It was investigated whether these changes could be a residual effect of the nutritional condition during lactation and wh...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-019-0413-0
更新日期:2019-12-12 00:00:00
abstract:BACKGROUND:Although evidence indicates that fatty acids (FA) can affect insulin resistance (IR), not all FA contribute equally to the process. Indeed, monounsaturated FA (MUFA) and polyunsaturated FA (PUFA) are reported to reduce IR, whereas saturated FA (SFA) and trans FA appear to increase IR. However, it is not yet ...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-10-42
更新日期:2013-06-17 00:00:00
abstract:Background:Nut consumption has been shown to reduce the risk of cardiovascular disease. However, its role in the prevention of metabolic disorders, such as metabolic syndrome (Mets) and overweight/obesity, remains controversial. We therefore conducted a meta-analysis to determine the association of nut consumption with...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-018-0282-y
更新日期:2018-06-22 00:00:00
abstract:Background:Obesity has been identified as a major risk factor for a large number of chronic diseases. Understanding factors related to adolescent obesity is critical for prevention of chronic diseases. The associations between sleep duration and obesity among adolescents in the existing literature are controversial. Ou...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-018-0285-8
更新日期:2018-07-09 00:00:00
abstract:Background:Reprogramming of fast-to-slow myofiber switch can improve endurance capacity and alleviate fatigue. Accumulating evidence suggests that a muscle-specific microRNA, miR-499 plays a crucial role in myofiber type transition. In this study, we assessed the effects of natural flavonoid myricetin on exercise endur...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-019-0353-8
更新日期:2019-05-02 00:00:00
abstract:BACKGROUND:Fasting is a rigorous type of dietary restriction that is associate with a number of health benefits. During fasting, ketone bodies significantly increase in blood and become major body fuels, thereby sparing glucose. In the present study, we investigated effects of fasting on hypersensitivity. In addition, ...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-11-40
更新日期:2014-08-28 00:00:00
abstract:BACKGROUND:Trimethylamine-N-oxide (TMAO) is an independent risk factor for atherosclerosis. Consumption of hawthorn fruit is believed to be cardio-protective, yet whether it is able to suppress the TMAO-induced atherosclerosis remains unexplored. The present study was to investigate the effects of hawthorn fruit extrac...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-020-00535-y
更新日期:2021-01-07 00:00:00
abstract:BACKGROUND:Studies have shown that the excessive fructose intake may induce adverse metabolic effects. There is no direct evidence from epidemiological studies to clarify the association between usual amounts of fructose intake and the metabolic syndrome. OBJECTIVE:The aim this study was to determine the association o...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-8-50
更新日期:2011-07-12 00:00:00
abstract:BACKGROUND:Supplementation studies have suggested a role of n-3 polyunsaturated fatty acids (PUFAs) in homocysteine metabolism, but the evidence is limited and inconsistent among studies that measured blood levels of n-3 and n-6 PUFAs. We examined the association between blood levels of PUFAs and homocysteine in Japane...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/1743-7075-10-41
更新日期:2013-06-10 00:00:00
abstract:BACKGROUND:The objective of this study was to describe the intake of macronutrient, especially fatty acids, and explore their possible effect on diabetic retinopathy (DR) in patients with type 2 diabetes mellitus. METHODS:In this case-control study, we included a total of 146 patients with DR and 148 without DR. The i...
journal_title:Nutrition & metabolism
pub_type: 杂志文章
doi:10.1186/s12986-016-0099-5
更新日期:2016-06-04 00:00:00
abstract:Objective:This systematic review and meta-analysis of randomized controlled trials (RCTs) was conducted to determine the effect of alpha-lipoic acid (ALA) supplementation on the inflammatory markers among patients with metabolic syndrome (MetS) and related disorders. Methods:We searched the following databases until N...
journal_title:Nutrition & metabolism
pub_type: 杂志文章,评审
doi:10.1186/s12986-018-0274-y
更新日期:2018-06-05 00:00:00