Antidiabetic properties of purified polysaccharide fromHedysarum polybotrys

2010 ◽  
Vol 88 (1) ◽  
pp. 64-72 ◽  
Author(s):  
Fangdi Hu ◽  
Xiaodong Li ◽  
Lianggong Zhao ◽  
Shilan Feng ◽  
Chunming Wang
Keyword(s):  
Nitric Oxide ◽  
Type 2 Diabetes ◽  
Fatty Acid ◽  
Density Lipoprotein ◽  
Control Group ◽  
Hepatic Glycogen ◽  
Oral Glucose ◽  
Synthetase Activity ◽  
Molecular Weight Range

Hedysarum polybotrys polysaccharide (HPS) is the principal active fraction responsible for the antidiabetic properties of this species. The aim of this study was to determine the antidiabetic properties of 4 purified fractions of different molecular weight range HPSs (HPS1, HPS2, HPS3, HPS4). HPS3 was selected for examination of its hypoglycemic mechanism because of its significant hypoglycemic effect in alloxan-induced diabetic mice. The changes in blood glucose levels and oral glucose tolerance tests (OGTT) showed that hypoglycemia was more pronounced in HPS3-treated groups than in the diabetes mellitus model (DM) control group. The interleukin-6, tumor necrosis factor-α, leptin, and free fatty acid levels were significantly lower in the HPS3-treated groups and HPS3 + metformin (HPS3+MET) group than in the DM control group, while plasma insulin, hepatic glycogen, superoxide dismutase, and nitric oxide synthetase activity were significantly higher. Treatment with HPS3 or HPS3+MET also significantly lowered malonaldehyde levels compared with the DM control group, while it elevated the nitric oxide and total antioxidant capacity. HPS3 altered the plasma lipid levels by lowering cholesterol and triglyceride concentrations, while elevating the plasma high-density lipoprotein cholesterol level. Therefore, these results suggest that HPS3 may partly ameliorate hyperglycemia and hyperlipidemia associated with type 2 diabetes through increased insulin secretion, inhibition of lipid peroxidation, promotion of sensitivity to insulin, suppression of gluconeogenesis and reduction in the biosynthesis fatty acid, cholesterol and cell cytokines related to insulin resistance, and it could be a useful adjunct therapy to a proven first-line therapy for type 2 diabetes using metformin.

Gamma-oryzanol Ameliorates Insulin Resistance and Hyperlipidemia in Rats with Streptozotocin/nicotinamide-induced Type 2 Diabetes

2010 ◽  
Vol 80 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Hsing-Hsien Cheng ◽  
Chien-Ya Ma ◽  
Tsui-Wei Chou ◽  
Ya-Yen Chen ◽  
Ming-Hoang Lai
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Lipid Metabolism ◽  
Rice Bran Oil ◽  
Area Under The Curve ◽  
Density Lipoprotein ◽  
Negative Influence ◽  
Control Group ◽  
Gamma Oryzanol

Gamma-oryzanol is a component of rice bran oil (RBO) with purported health benefits. This study evaluated the effects of gamma-oryzanol on insulin resistance and lipid metabolism in Wistar rats with type 2 diabetes (T2DM). The rats were divided into three groups and consumed one of the following diets for 5 weeks: 15 % soybean oil (control group); 15 % palm oil (PO); and 15 % PO with the addition of 5.25 g gamma-oryzanol (POO). The results showed that PO markedly increased plasma low-density-lipoprotein cholesterol, plasma triglycerides, and hepatic triglyceride levels, but did not reduce the area under the curve for glucose and insulin significantly, compared with the control group. Adding gamma-oryzanol to PO improved the negative influence of PO on lipid metabolism in T2DM rats. In addition, gamma-oryzanol tended to increase insulin sensitivity in T2DM rats compared to control and PO groups. Longer-term studies are needed to evaluate these effects further.

scholarly journals IMPROVEMENT IN OXIDATIVE STRESS AFTER DUODENOJEJUNOSTOMY IN AN EXPERIMENTAL MODEL OF TYPE 2 DIABETES MELLITUS

2016 ◽  
Vol 29 (suppl 1) ◽  
pp. 3-7 ◽  
Author(s):  
Cacio Ricardo WIETZYCOSKI ◽  
João Caetano Dallegrave MARCHESINI ◽  
Sultan AL-THEMYAT ◽  
Fabiola Shons MEYER ◽  
Manoel Roberto Maciel TRINDADE
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Diabetic Rats ◽  
Diabetic Group ◽  
Control Group ◽  
Oral Glucose ◽  
Surgical Group

ABSTRACT Background: Type 2 Diabetes Mellitus is a multifactorial syndrome with severe complications. Oxidative stress is accepted as a causal factor of chronic complications Aim: To demonstrate alterations in oxidative stress after metabolic surgery. Methods: Twenty-four 2-day-old Wistar rats were used. In 16, Type 2 Diabetes Mellitus was induced by 100 mg/kg streptozotocin injection. The development of diabetes was confirmed after 10 weeks using an oral glucose tolerance test. Eight diabetic rats composed the diabetic surgical group; the remaining eight composed the diabetic group. Eight animals in which diabetes was not induced formed the clinical control group. The Marchesini technique was used in the diabetic surgical group. After 90 days, the rats were sacrificed, and the oxidative stress markers were measured. Results: Thiobarbituric acid reactive substances, superoxide dismutase and catalase were significantly reduced in the diabetic surgical group compared to the diabetic group. Conclusion: The duodenojejunostomy was effective in controlling the exacerbated oxidative stress present in diabetic rats.

scholarly journals Polysaccharide from Okra (Abelmoschus esculentus (L.) Moench) Improves Antioxidant Capacity via PI3K/AKT Pathways and Nrf2 Translocation in a Type 2 Diabetes Model

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1906 ◽  
Author(s):  
Zhengzheng Liao ◽  
Jingying Zhang ◽  
Bing Liu ◽  
Tingxu Yan ◽  
Fanxing Xu ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Body Weight ◽  
Glycogen Synthase ◽  
Density Lipoprotein ◽  
Biologically Active ◽  
Lipoprotein Cholesterol ◽  
Abelmoschus Esculentus ◽  
Heme Oxygenase 1 ◽  
Hepatic Glycogen

Polysaccharide extracted from okra (Abelmoschus esculentus (L.) Moench), a traditional functional food, is a biologically active substance reported to possess hypoglycemic and anti-oxidative qualities. However, it is unknown which polysaccharides play a role and have the potential mechanism. This present study is to assess the possible impacts of a novel polysaccharide isolated from okra (OP) on mice fed with a high-fat diet (HFD) combined with an intraperitoneal injection (i.p.) of 100 mg/kg streptozotocin (STZ) twice, to induce type 2 diabetes mellitus (T2DM). We found that an eight-week administration of OP at 200 or 400 mg/kg body weight significantly alleviated the symptoms, with elevations in blood glucose, triglyceride (TG), total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C), as well as reducing high-density lipoprotein cholesterol (HDL-C), body weight, food, and water consumption. The OP treatment increased the hepatic glycogen and decreased the mussy hepatic cords and liver fibrosis in the T2DM mice. The decreases of ROS and MDA and the increases of SOD, GSH-Px and CAT in liver were observed after administration of OP. OP alleviated the T2DM characteristics through the activation of the phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/glycogen synthase kinase 3 beta (GSK3β) pathway, and enhanced the nuclear factor erythroid-2 (Nrf2) expression and promoted Nrf2-medicated heme oxygenase-1(HO-1) and superoxide dismutase 2 (SOD2) expression. OP also relieved mitochondrial dysfunction by inhibiting NOX2 activation. Taken together, these findings suggest that a polysaccharide isolated from okra exerts anti-T2DM effects partly by modulating oxidative stress through PI3K/AKT/GSK3β pathway-medicated Nrf2 transport. We have determined that a polysaccharide possesses hypoglycemic activity, as well as its underlying mechanism.

scholarly journals Serum concentrations of asprosin in new-onset type 2 diabetes

2020 ◽  
Author(s):  
Shakiba Naiemian ◽  
Mohsen naeemipour ◽  
Mehdi Zarei ◽  
Ali Gohari ◽  
Mohammad Reza Behroozikhah ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Fasting Blood Glucose ◽  
Density Lipoprotein ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Model Assessment ◽  
Serum Concentrations ◽  
Atherosclerotic Risk Factor

Abstract Background: Asprosin, a newly identified adipokine, is pathologically increased in individuals with insulin resistance. However, the available evidence on the association of asprosin and type 2 diabetes mellitus (T2DM) status is still scarce. Therefore, this study aimed to determine the relationship between serum concentrations of asprosin and T2DM status . Methods: This observational study was performed based on 194 adults (97 newly diagnosed T2DM and 97 healthy individuals). Anthropometric and biochemical variables were determined in all participants . Serum concentrations of asprosin were measured using enzyme-linked immunosorbent assay (ELISA). Results: In patients with T2DM, the serum concentrations of asprosin were significantly higher than the healthy controls (4.18 [IQR: 4.4] vs. 3.5 [IQR: 1.85], P< 0.001). The concentrations of asprosin were significantly correlated with body mass index (BMI) and fasting blood glucose (FBG) in healthy subjects and with BMI, FBG, hemoglobin A1c (HbA1c), homeostatic model assessment of insulin resistance (HOMA-IR), and quantitative insulin check index (QUICKI), triacylglycerol (TAG) and total cholesterol/ high-density lipoprotein cholesterol (TC/HDL-C) ratio in the T2DM group. In fully adjusted model, the odds ratio (OR) of T2DM with serum concentrations of asprosin was approximately 1.547 (95% CI 1.293-1.850, P< 0.001) compared to the control group . Multiple stepwise regression analysis indicated that FBG and HOMA-IR were independently associated with asprosin in T2DM. Conclusion : Our findings indicated that serum concentrations of asprosin are increased in patients with T2DM. Also, asprosin is correlated with insulin resistance and TC/HDL-C ratio (atherosclerotic risk factor of cardiovascular diseases) in patients with T2DM.

scholarly journals The risk of cardiovascular death in type 2 diabetes

2017 ◽  
Vol 95 (1) ◽  
pp. 57-59
Author(s):  
N. V. Zeinalova ◽  
Yagub Ziyaddin Kurbanov ◽  
V. A. Mirzazade ◽  
R. A. Rzayeva ◽  
M. S. Novruzova
Keyword(s):  
Type 2 Diabetes ◽  
Metabolic Disorders ◽  
Density Lipoprotein ◽  
Cardiovascular Death ◽  
Control Group ◽  
Average Risk ◽  
Virtual Control ◽  
Framingham Risk ◽  
Patients With Diabetes

Aim. To evaluate effects of metabolic disorders on the risk of cardiovascular death in patients with type II diabetes based on Framingham risk score. We analyzed results of examination of 210 men and 210 women with type 2 diabetes who applied for medical care to the VM center of Endocrinology during 1997-2014. A virtual control group was formed matching real patients in terms of the number, sex, age, and height having ideal body mass index, total cholesterol and high-density lipoprotein cholesterol levels. The average risk of cardiovascular death in patients with type 2 diabetes was equal to 4,56±0,254% compared with 0,6±1,028% in the virtual control group. The differences was significant (p <0,001). The minimum risk for the patients of the two groups was estimated at 0,001% and 0,01% respectively. The maximum risk of cardiovascular death is 34,17% in patients with diabetes and 8,24% in controls. It is concluded that type 2 diabetes and related metabolic disorders significantly increase the risk of cardiovascular death.

scholarly journals Effects of Fasting-Mimicking Diet and Specific Meal Replacement Foods on Blood Glucose Control in Patients with Type 2 Diabetes: A Randomized Controlled Trial

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Fang Tang ◽  
Xuan Lin
Keyword(s):  
Type 2 Diabetes ◽  
Blood Glucose ◽  
Venous Blood ◽  
Fasting Blood Glucose ◽  
Blood Glucose Control ◽  
Density Lipoprotein ◽  
Control Group ◽  
Meal Replacement ◽  
Experimental Group

Type 2 diabetes represents a serious societal health problem due to the vulnerability to cardiovascular events. Diet therapy is the most basic treatment for type 2 diabetes. The present study was conducted to study the effect of a fasting-mimicking diet and specific meal replacement foods on blood glucose control in patients with type 2 diabetes. Our study included 100 patients with type 2 diabetes who underwent a physical examination which were enrolled and randomly assigned as 50 patients each to the test group (with low energy-specific meal replacement meals during a fasting-mimicking diet) and the control group (with specific meal replacement foods given normal adult doses). After 4 months, efficacy indicators which were fasting blood glucose, 2-hour postprandial venous blood glucose, and glycosylated haemoglobin of the experimental group were all lower than those of the control group ( P < 0.05 ); observation indicators that include body mass index, waist circumference, blood lipids (triglyceride, cholesterol, and low-density lipoprotein), and blood pressure levels were all lower than the control group, and high-density lipoprotein levels were all higher than the control group (all P < 0.05 ). Both groups of fasting blood glucose, 2-hour postprandial venous blood glucose, and blood pressure had a relatively stable downward trend, but the experimental group had a more significant decline. In conclusion, the study revealed that a fasting-mimicking diet and specific meal replacement foods can safely and effectively reduce weight and improve metabolic syndrome in patients with type 2 diabetes.

scholarly journals Adipokines, Oxidized Low-Density Lipoprotein, and C-Reactive Protein Levels in Lean, Overweight, and Obese Portuguese Patients with Type 2 Diabetes

ISRN Obesity ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Maria João Neuparth ◽  
Jorge Brandão Proença ◽  
Alice Santos-Silva ◽  
Susana Coimbra
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
The Body ◽  
Control Group ◽  
Obese Patients ◽  
And Control

Aim. Our aim was to study how different BMI scores may influence the levels of inflammation, oxidative stress, adipogenesis, glucose, and lipid metabolism, in lean, overweight, and obese Portuguese patients with type 2 diabetes mellitus (T2DM). Methods. We studied 28 lean, 38 overweight, and 17 obese patients with T2DM and 20 controls (gender and age matched). The circulating levels of oxLDL, CRP, and some adipokines—adiponectin, leptin, and chemerin—and the lipid profile were evaluated. Results. Obese patients presented significantly lower levels of adiponectin and higher leptin, oxLDL, and chemerin levels, as compared to the overweight, lean, and control groups. Overweight, compared to lean and control, subjects showed significantly lower adiponectin and higher leptin and chemerin levels; oxLDL values were significantly higher in overweight than in lean patients. Lean patients presented significantly higher chemerin values than the control. Obese patients presented significantly higher CRP values, as compared to lean patients and the control group. Obese and overweight patients presented significantly higher triglycerides values than lean patients. Except for CRP, all the observed significant changes between control and patients remained significant after statistical adjustment for the body mass index (BMI). Conclusion. The levels of leptin, adiponectin, oxLDL, CRP, and triglycerides in patients with T2DM seem to be more associated with obesity and less with diabetes. Chemerin levels were raised in lean, overweight, and obese patients, suggesting that, independently of BMI, an adipocyte dysfunction occurs. Moreover, chemerin may provide an important early biomarker of adipocyte dysfunction and a link between obesity and type 2 diabetes mellitus.

scholarly journals Plasma Free Fatty Acids and Metabolic Effect in Type 2 Diabetes, an Ancillary Study from a Randomized Clinical Trial

Nutrients ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 1145
Author(s):  
Joanna Mitri ◽  
Shaheen Tomah ◽  
Jeremy Furtado ◽  
Mhd Wael Tasabehji ◽  
Osama Hamdy
Keyword(s):  
Type 2 Diabetes ◽  
Clinical Trial ◽  
Fatty Acids ◽  
Palmitoleic Acid ◽  
Density Lipoprotein ◽  
Control Group ◽  
Pentadecanoic Acid ◽  
Main Trial ◽  
Dairy Consumption

Most nutrition studies looking at the association of food with cardiometabolic markers rely on food frequency questionnaires, which are prone to recall bias. Pentadecanoic acid, heptadecanoic acid and trans-palmitoleic acid are fatty acids that are not synthesized endogenously but are obtained from the diet, particularly dairy, making them reasonable biomarkers of dairy consumption. We investigated the association of dairy fatty acid biomarkers with glycated hemoglobin (HbA1c) and cardiovascular risk factors in type 2 diabetes (T2D). In a clinical trial, 111 participants with T2D (age 58.5 ± 8.9 years, HbA1c 8.09 ± 0.96%) were randomized into three groups: a control group that maintained baseline dairy intake, a low-fat (LF) group that incorporated ≥3 servings/day of LF dairy and a high-fat (HF) group that incorporated ≥3 servings/day of HF dairy. We compared the fatty acids (FA) composition between the three groups at 24 weeks. Pentadecanoic acid and trans-palmitoleic acid increased in the HF group by 14.1% ± 5.4% and 17.5% ± 5.1%, respectively, but not in the control and LF groups (p = 0.0474 and p= 0.0025 for group-by-time interaction, respectively). Those increases were positively associated with changes in total cholesterol, very-low-density lipoprotein cholesterol VLDL-C and triglycerides but were not associated with changes in HbA1c from baseline to 24 weeks. These results suggest that the intervention was successful and that participants were likely compliant, which supports the validity of the main trial.

scholarly journals Plasma miR-21 expression: an indicator for the severity of Type 2 diabetes with diabetic retinopathy

2017 ◽  
Vol 37 (2) ◽  
Author(s):  
Qi Jiang ◽  
Xue-Man Lyu ◽  
Yi Yuan ◽  
Ling Wang
Keyword(s):  
Type 2 Diabetes ◽  
Diabetic Retinopathy ◽  
Low Density Lipoprotein ◽  
Fasting Blood Glucose ◽  
Density Lipoprotein ◽  
Diagnostic Value ◽  
Control Group ◽  
Model Assessment ◽  
Disease Course

To investigate the roles of plasma miR-21 in the pathogenic process of Type 2 diabetes (T2D) with diabetic retinopathy (DR). T2D patients included patients without DR (NDR) group, patients with non-proliferative/background DR (BDR) group and patients with proliferative DR (PDR) group. Healthy individuals served as control group. Fasting plasma glucose (FPG), glycosylated haemoglobin (HbA1c), triacylglycerol (TG), total cholesterol (TC), urine creatinine (Cr), fasting blood glucose (FBG), blood urea nitrogen (BUN), low-density lipoprotein cholesterol (LDL-C), fasting insulin (FINS) and plasma miR-21 expression were measured. Quantitative real-time PCR (qRT-PCR) was applied to detect miR-21 expression. Pearson analysis was used to conduct correlation analysis and receiver operating characteristic (ROC) curve was used to analyse the diagnostic value of miR-21 in T2D with DR. Compared with the control group, FBG and HbA1c increased in the NDR group; compared with the control and NDR groups, disease course, HbA1c, FPG levels and homoeostasis model assessment of insulin resistance (HOMA-IR) were increased in the BDR and PDR groups; and compared with the BDR group, disease course, HbA1c and FPG levels were higher in the PDR group. miR-21 expression was higher in the BDR group than the control group, and higher in the PDR group than the BDR group. miR-21 expression was positively related with disease course, HbA1C, FPG and HOMA-IR, and had diagnostic value for T2D with DR and PDR. The plasma miR-21 expression was increased in the development of T2D with DR and can be used as an indicator for the severity of T2D with DR.

scholarly journals MON-030 Intermediate Hyperglycemia and Type 2 Diabetes in Women with Polycystic Ovary Syndrome: Findings from Large Caucasian Cohort

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Sarantis Livadas ◽  
Christina Bothou ◽  
Justyna Kuliczkowska-Płaksej ◽  
Ioannis Androulakis ◽  
Ralitsa Robeva ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Polycystic Ovary Syndrome ◽  
Glucose Tolerance ◽  
Polycystic Ovary ◽  
Control Group ◽  
Oral Glucose ◽  
Ovary Syndrome ◽  
Free Androgen Index ◽  
Rotterdam Criteria

Abstract Background: Insulin secretory defects and insulin resistance exists in women with polycystic ovary syndrome (PCOS) and are prerequisites for the development of type 2 diabetes (T2D). Objective: To determine the prevalence of T2D, impaired glucose tolerance (IGT) and impaired fasting glucose (IFG), as well as the factors associated with these dysglycemic conditions. Participants: 1614 women with PCOS of Caucasian origin (Rotterdam criteria) with a mean age 25.14±5.56 years and BMI 27.34±7.09 kg/m2 comprised the study group, whereas 359 normally ovulating, not hyperandrogenic women of comparable age and BMI, served as controls. Design: Observational study. Setting: Outpatient clinics of tertiary hospitals. Main Outcome and Measures: Clinical, biochemical, hormonal and ovarian ultrasound as well oral glucose tolerance test were performed in all subjects participating in the study. Diabetes and intermediate hypeglycemia was categorised according to WHO criteria and PCOS subgroups was based on the Rotterdam criteria. Results: In the PCOS group 2.2%, 9.5% and 12,4% of subjects had T2D, IGT and IFG, respectively. In control group 1,11%, 7.5% and 8.9% had T2D, IGT and IFG, respectively. When the existence of T2D was stratified according to age and BMI, no difference was found among age and BMI subgroups or PCOS subgroups. Namely in patients aged 17-22 years, T2D was detected in 3 lean and 2 obese subjects. The corresponding distribution for patients aged 22-30 years was 4 lean, one overweight and 2 obese, whereas in those older than 31 years, 2 overweight and 5 obese suffered from T2D. Free Androgen Index (FAI), waist to hip ratio (WHR) and LDL levels were significantly higher in T2D subjects in comparison to PCOS women with normal glucose metabolism. Diagnosis of T2D was significantly associated with Free Androgen Index (r: 0.469, p&lt;0.05), while subjects with either IFG and IGT had positive association with BMI, WHR, FAI and HOMA-IR. In controls, T2D, IGT and IFG were positively associated with BMI and androgen concentrations. Conclusions: The prevalence of T2D and IGT is significantly higher in our large cohort of PCOS women in comparison to controls. The existence of T2D is irrespective of age and BMI, and seems to be inherent for PCOS women. Hence, the evaluation of glycemic status in women with PCOS using OGTT is supported.

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