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Ferrannini G, Norhammar A, Gyberg V, Mellbin L, Rydén L. Is Coronary Artery Disease Inevitable in Type 2 Diabetes? From a Glucocentric to a Holistic View on Patient Management. Diabetes Care 2020; 43:2001-2009. [PMID: 32661109 DOI: 10.2337/dci20-0002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 05/18/2020] [Indexed: 02/03/2023]
Affiliation(s)
| | - Anna Norhammar
- Department of Medicine K2, Karolinska Institutet, Stockholm, Sweden
| | - Viveca Gyberg
- Department of Medicine K2, Karolinska Institutet, Stockholm, Sweden
| | - Linda Mellbin
- Department of Medicine K2, Karolinska Institutet, Stockholm, Sweden
| | - Lars Rydén
- Department of Medicine K2, Karolinska Institutet, Stockholm, Sweden
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New Insights into the Mechanisms of Chinese Herbal Products on Diabetes: A Focus on the "Bacteria-Mucosal Immunity-Inflammation-Diabetes" Axis. J Immunol Res 2017; 2017:1813086. [PMID: 29164155 PMCID: PMC5661076 DOI: 10.1155/2017/1813086] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/27/2017] [Accepted: 07/25/2017] [Indexed: 12/25/2022] Open
Abstract
Diabetes, especially type 2, has been rapidly increasing all over the world. Although many drugs have been developed and used to treat diabetes, side effects and long-term efficacy are of great challenge. Therefore, natural health product and dietary supplements have been of increasing interest alternatively. In this regard, Chinese herbs and herbal products have been considered a rich resource of product development. Although increasing evidence has been produced from various scientific studies, the mechanisms of action are lacking. Here, we have proposed that many herbal monomers and formulae improve glucose homeostasis and diabetes through the BMID axis; B represents gut microbiota, M means mucosal immunity, I represents inflammation, and D represents diabetes. Chinese herbs have been traditionally used to treat diabetes, with minimal side and toxic effects. Here, we reviewed monomers such as berberine, ginsenoside, M. charantia extract, and curcumin and herbal formulae such as Gegen Qinlian Decoction, Danggui Liuhuang Decoction, and Huanglian Wendan Decoction. This review was intended to provide new perspectives and strategies for future diabetes research and product.
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Qin W, Ren B, Wang S, Liang S, He B, Shi X, Wang L, Liang J, Wu F. Apigenin and naringenin ameliorate PKCβII-associated endothelial dysfunction via regulating ROS/caspase-3 and NO pathway in endothelial cells exposed to high glucose. Vascul Pharmacol 2016; 85:39-49. [PMID: 27473516 DOI: 10.1016/j.vph.2016.07.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/17/2016] [Accepted: 07/24/2016] [Indexed: 11/17/2022]
Abstract
Endothelial dysfunction is a key event in the progression of atherosclerosis with diabetes. Increasing cell apoptosis may lead to endothelial dysfunction. Apigenin and naringenin are two kinds of widely used flavones. In the present study, we investigated whether and how apigenin and naringenin reduced endothelial dysfunction induced by high glucose in endothelial cells. We showed that apigenin and naringenin protected against endothelial dysfunction via inhibiting phosphorylation of protein kinase C βII (PKCβII) expression and downstream reactive oxygen species (ROS) production in endothelial cells exposed to high glucose. Furthermore, we demonstrated that apigenin and naringenin reduced high glucose-increased apoptosis, Bax expression, caspase-3 activity and phosphorylation of NF-κB in endothelial cells. Moreover, apigenin and naringenin effectively restored high glucose-reduced Bcl-2 expression and Akt phosphorylation. Importantly, apigenin and naringenin significantly increased NO production in endothelial cells subjected to high glucose challenge. Consistently, high glucose stimulation impaired acetylcholine (ACh)-mediated vasodilation in the rat aorta, apigenin and naringenin treatment restored the impaired endothelium-dependent vasodilation via dramatically increasing eNOS activity and nitric oxide (NO) level. Taken together, our results manifest that apigenin and naringenin can ameliorate endothelial dysfunction via regulating ROS/caspase-3 and NO pathway.
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Affiliation(s)
- Weiwei Qin
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Bei Ren
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Taiyuan Institute For Food And Drug Control, 85 Longcheng Avenue, Taiyuan 030000, PR China
| | - Shanshan Wang
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Shujun Liang
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Baiqiu He
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Xiaoji Shi
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Liying Wang
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Jingyu Liang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China
| | - Feihua Wu
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, PR China.
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Ibrahim MA, Habila JD, Koorbanally NA, Islam MS. Butanol fraction of Parkia biglobosa (Jacq.) G. Don leaves enhance pancreatic β-cell functions, stimulates insulin secretion and ameliorates other type 2 diabetes-associated complications in rats. JOURNAL OF ETHNOPHARMACOLOGY 2016; 183:103-111. [PMID: 26911526 DOI: 10.1016/j.jep.2016.02.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 01/19/2016] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ethnopharmacological surveys have reported that Parkia biglobosa (Jacq.) G. Don (Leguminosae) is among the plants commonly used in the traditional management of diabetes mellitus in Nigeria and Togo. AIM OF THE STUDY This study investigated the anti-diabetic activity of the butanol fraction of P. biglobosa leaves (PBBF) in a type 2 diabetes (T2D) model of rats and a possible bioactive compound in the fraction. MATERIALS AND METHODS T2D was induced by feeding rats with a 10% fructose solution ad libitum for two weeks followed by an intraperitoneal injection of 40mg/kg body weight streptozotocin and the animals were orally treated with 150 and 300mg/kg BW of the PBBF for five days in a week. Another group of rats was non-diabetic but similarly administered with 300mg/kg BW of the PBBF. Food and fluid intakes, body weight changes and blood glucose levels were monitored during the experiment while other relevant diabetes-associated parameters were measured at the end of the experiment. RESULTS The PBBF treatments significantly (P<0.05) decreased the blood glucose levels and improved the glucose tolerance ability compared to untreated diabetic rats. Furthermore, the treatments were found to improve pancreatic β cell function (HOMA-β), stimulate insulin secretions, decrease insulin resistance (HOMA-IR), restore liver glycogen, ameliorate serum dyslipidaemia and prevent hepatic and renal damages compared to untreated diabetic rats. Phytochemical analysis of the fraction led to the isolation of lupeol which inhibited α-glucosidase and α-amylase in non-competitive and uncompetitive inhibition patterns respectively. CONCLUSION It was concluded that PBBF possessed remarkable anti-T2D activity which is mediated through modulation of β-cell function and stimulation of insulin secretion and the lower dose (150mg/kg BW) was found optimum for anti-T2D activity compared to the high dose (300mg/kg BW) in this study.
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Affiliation(s)
- Mohammed Auwal Ibrahim
- School of Life Sciences, University of KwaZulu-Natal (Westville Campus), Durban 4000 South Africa; Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria
| | - James Dama Habila
- School of Chemistry, University of KwaZulu-Natal (Westville Campus), Durban 4000 South Africa
| | | | - Md Shahidul Islam
- School of Life Sciences, University of KwaZulu-Natal (Westville Campus), Durban 4000 South Africa.
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Srinivasan MP, Kamath PK, Bhat NM, Pai ND, Manjrekar PA, Mahabala C. Factors associated with no apparent coronary artery disease in patients with type 2 diabetes mellitus for more than 10 years of duration: a case control study. Cardiovasc Diabetol 2015; 14:146. [PMID: 26521236 PMCID: PMC4628335 DOI: 10.1186/s12933-015-0307-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 10/23/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Type 2 diabetes mellitus is an important risk factor in the development of coronary artery disease (CAD) and is often associated with severe disease. However, this risk is not uniform, some patients remain free of CAD even after many years of treatment for diabetes. The present study was aimed to identify the factors that are associated with a favorable CAD profile. METHODS A case-control study of 76 patients with type 2 diabetes mellitus who were on treatment for more than 10 years duration and undergoing a coronary angiogram for the evaluation of clinically suspected CAD at a tertiary care hospital were recruited for the study. The presence and absence of significant CAD was determined after a coronary angiogram. Clinical history, and anthropometric and biochemical parameters were analyzed. Insulin resistance was determined by the Homeostasis Model Assessment. Multiple logistic regressions were done to find out the factors associated for a favorable CAD profile. RESULTS The difference in HOMA-IR (2.37 ± 0.69 VS 3.77 ± 1.64, p < 0.001) and urine microalbumin (24.15 ± 32.16 VS 82.72 ± 117.70, p = 0.004) were found to be statistically significant among those who did not have CAD when compared to those who had CAD. The difference in lipid profile, HbA1C, fasting blood sugar, BMI, waist hip ratio, waist and hip circumference was not significant. The adjusted odds ratio for insulin resistance less than 2.5 (OR 9.09, 95 % CI 1.91-41.83, p = 0.005), females (OR 7.91, 95% CI 1.55-40.38, p = 0.013) and microalbumin <20 mg/l (OR 4.57, 95% CI 1.17-17.85, p = 0.029) were independently associated with normal coronaries. The adjusted odds ratio for lipid profile, BMI, blood pressure and HbA1C were not significant. CONCLUSIONS HOMA-IR less than 2.5, microalbuminuria less than 20 mg/l and females are the factors appear to be associated with no apparent CAD.
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Affiliation(s)
- Mukund P Srinivasan
- Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, 575001, India.
| | - Padmanabh K Kamath
- Department of Cardiology, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India.
| | - Narayan M Bhat
- Department of Cardiology, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India.
| | - Narasimha D Pai
- Department of Cardiology, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India.
| | - Poornima A Manjrekar
- Department of Biochemistry, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India.
| | - Chakrapani Mahabala
- Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, 575001, India.
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Effect of sardine proteins on hyperglycaemia, hyperlipidaemia and lecithin:cholesterol acyltransferase activity, in high-fat diet-induced type 2 diabetic rats. Br J Nutr 2015; 115:6-13. [PMID: 26507559 DOI: 10.1017/s0007114515004195] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Type 2 diabetes (T2D) is a major risk factor of CVD. The effects of purified sardine proteins (SP) were examined on glycaemia, insulin sensitivity and reverse cholesterol transport in T2D rats. Rats fed a high-fat diet (HFD) for 5 weeks, and injected with a low dose of streptozotocin, were used. The diabetic rats were divided into four groups, and they were fed casein (CAS) or SP combined with 30 or 5% lipids, for 4 weeks. HFD-induced hyperglycaemia, insulin resistance and hyperlipidaemia in rats fed HFD, regardless of the consumed protein. In contrast, these parameters lowered in rats fed SP combined with 5 or 30% lipids, and serum insulin values reduced in SP v. CAS. HFD significantly increased total cholesterol and TAG concentrations in the liver and serum, whereas these parameters decreased with SP, regardless of lipid intake. Faecal cholesterol excretion was higher with SP v. CAS, combined with 30 or 5% lipids. Lecithin:cholesterol acyltransferase (LCAT) activity and HDL3-phospholipids (PL) were higher in CAS-HF than in CAS, whereas HDL2-cholesteryl esters (CE) were lower. Otherwise, LCAT activity and HDL2-CE were higher in the SP group than in the CAS group, whereas HDL3-PL and HDL3-unesterified cholesterol were lower. Moreover, LCAT activity lowered in the SP-HF group than in the CAS-HF group, when HDL2-CE was higher. In conclusion, these results indicate the potential effects of SP to improve glycaemia, insulin sensitivity and reverse cholesterol transport, in T2D rats.
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Wei S, Li W, Yu Y, Yao F, A L, Lan X, Guan F, Zhang M, Chen L. Ginsenoside Compound K suppresses the hepatic gluconeogenesis via activating adenosine-5′monophosphate kinase: A study in vitro and in vivo. Life Sci 2015; 139:8-15. [DOI: 10.1016/j.lfs.2015.07.032] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 07/27/2015] [Accepted: 07/29/2015] [Indexed: 02/04/2023]
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Li Y, Liu Y, Shi D, Yang L, Liang J, Zhou Y. Insulin Resistance Increases the Risk of Contrast-Induced Nephropathy in Patients Undergoing Elective Coronary Intervention. Angiology 2015; 67:139-45. [PMID: 25843952 DOI: 10.1177/0003319715578997] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We assessed the influence of insulin resistance (IR) on the development of contrast-induced nephropathy (CIN) in patients (n = 719) undergoing elective percutaneous coronary intervention (PCI). Patients were divided into diabetes mellitus (DM = 242), nondiabetic IR (IR = 120), and nondiabetic insulin sensitivity (IS = 357) groups according to medical history and homeostasis model assessment insulin resistance index. Serum creatinine (SCr) and estimated glomerular filtration rate (eGFR) were measured before and 72 hours after PCI. There were no differences in SCr and eGFR among the groups before PCI; SCr increased and eGFR decreased significantly in the DM and IR groups post-PCI (P < .001). The incidence of CIN in the IR group was as high as in the DM group and were both significantly higher than in the IS group (6.7% vs 8.7% vs 2.2%, P < .05). Multivariate logistic regression analysis showed DM (odds ratio [OR] = 1.19, 95%CI = 1.08-1.510, P < .001), HOMA-IR (OR = 1.39, 95%CI = 1.23-1.58, P < 0.001), and eGFR (OR = 0.88, 95%CI = 0.84-0.92, P < .001) were independent risk factors in predicting CIN. Screening IR patients and taking appropriate prophylactic strategy before PCI may reduce the incidence of CIN.
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Affiliation(s)
- Yueping Li
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Yuyang Liu
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Dongmei Shi
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Lixia Yang
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Jing Liang
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Yujie Zhou
- Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-related Cardiovascular Disease, Ministry of Education, Beijing, China
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Chandramohan R, Pari L, Rathinam A, Sheikh BA. Tyrosol, a phenolic compound, ameliorates hyperglycemia by regulating key enzymes of carbohydrate metabolism in streptozotocin induced diabetic rats. Chem Biol Interact 2015; 229:44-54. [PMID: 25641191 DOI: 10.1016/j.cbi.2015.01.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/02/2015] [Accepted: 01/21/2015] [Indexed: 12/23/2022]
Abstract
The present study was designed to evaluate the effects of tyrosol, a phenolic compound, on the activities of key enzymes of carbohydrate metabolism in the control and streptozotocin-induced diabetic rats. Diabetes mellitus was induced in rats by a single intraperitoneal injection of streptozotocin (40 mg/kg body weight). Experimental rats were administered tyrosol 1 ml intra gastrically at the doses of 5, 10 and 20mg/kg body weight and glibenclamide 1 ml at a dose of 600 μg/kg body weight once a day for 45 days. At the end of the experimental period, diabetic control rats exhibited significant (p<0.05) increase in plasma glucose, glycosylated hemoglobin with significant (p<0.05) decrease in plasma insulin, total hemoglobin and body weight. The activities of key enzymes of carbohydrate metabolism such as phosphoenolpyruvate carboxykinase, fructose-1,6-bisphosphatase and glucose-6-phosphatase were significantly (p<0.05) increased and the activities of hexokinase and glucose-6-phosphate dehydrogenase were significantly (p<0.05) decreased in the liver and kidney of diabetic control rats. Further, antioxidants were lowered in diabetic control rats. A significant (p<0.05) decline in glycogen level in the liver and muscle and glycogen synthase activity in the liver and a significant (p<0.05) increase in the activity of liver glycogen phosphorylase were observed in diabetic control rats compared to normal control rats. Oral administration of tyrosol to diabetic rats reversed all the above mentioned biochemical parameters to near normal in a dose dependent manner. Tyrosol at a dose of 20mg/kg body weight showed the highest significant effect than the other two doses. Immunohistochemical staining of pancreas revealed that tyrosol treated diabetic rats showed increased insulin immunoreactive β-cells, which confirmed the biochemical findings. The observed results were compared with glibenclamide, a standard oral hypoglycemic drug. The results of the present study suggest that tyrosol decreases hyperglycemia, by its antioxidant effect.
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Affiliation(s)
- Ramasamy Chandramohan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamilnadu, India
| | - Leelavinothan Pari
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamilnadu, India.
| | - Ayyasamy Rathinam
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamilnadu, India
| | - Bashir Ahmad Sheikh
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamilnadu, India
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Li YG, Ji DF, Zhong S, Lin TB, Lv ZQ. Hypoglycemic effect of deoxynojirimycin-polysaccharide on high fat diet and streptozotocin-induced diabetic mice via regulation of hepatic glucose metabolism. Chem Biol Interact 2014; 225:70-9. [PMID: 25446853 DOI: 10.1016/j.cbi.2014.11.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/05/2014] [Accepted: 11/10/2014] [Indexed: 02/07/2023]
Abstract
Type 2 diabetes mellitus (T2DM) is currently considered a worldwide epidemic and finding effective therapeutic strategies against this disease is highly important. A deoxynojirimycin-polysaccharide mixture (DPM) has previously been shown to exert hypoglycemic effects on alloxan- or streptozotocin (STZ)-induced diabetic mice. The purpose of the present study was to evaluate the therapeutic effects and underlying mechanism(s) of DPM on T2DM induced by high fat diet following low-dose STZ treatment in mice. After daily oral treatment of diabetic mice with DPM (150 mg/kg b.w.) for 90 d, significant decline in blood glucose, pyruvate, triglyceride (TG), aspartate transaminase (AST), alanine transaminase (ALT), creatinine (Cr), lipid peroxide (LPO) and malondialdehyde (MDA) levels as well as evident increases in high density lipoprotein (HDL-c) and hepatic glycogen concentrations were observed. In the first stage, in which DPM was administered for 60 d, blood insulin levels did not undergo significant change but a significant decrease in the HOMA-IR index was detected. By contrast, the HOMA-IR index increased significantly in T2MD controls. In the second stage, in which DPM treatment was continued for another 30 d, insulin levels significantly increased in DPM-treated mice in comparison with T2DM controls. These results indicate that insulin resistance in the pre-diabetic period and the dysfunction of pancreatic β-cells are ameliorated by DPM treatment. DPM also down-regulated protein levels of insulin receptor (IR) and gluconeogenic enzymes (pyruvate carboxylase, fructose-1, 6-bisphosphatase, phosphoenolpyruvate carboxykinase and glucose-6-phosphatase) in peripheral tissues (liver and/or muscle), but enhanced the expressions of insulin in pancreas, lipoprotein lipase (LPL) and glycolysis enzymes (glucokinase, phosphofructokinase, private kinase and pyruvate decarboxylase E1) in the liver. Furthermore, deoxynojirimycin (DNJ) and polysaccharide (P) were found to increase proliferation of hepatic LO-2 cells and scavenging of radicals in vitro. These results support the results of our biochemical analyses and underscore possible mechanisms underlying the protective effects of DPM on STZ-induced damage to the pancreas and the liver. Taken together, our findings suggest that DPM may be developed as an antihyperglycemic agent for the treatment of diabetes mellitus.
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Affiliation(s)
- You-gui Li
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
| | - Dong-feng Ji
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China.
| | - Shi Zhong
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
| | - Tian-bao Lin
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
| | - Zhi-qiang Lv
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
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Aydin E, Ozkokeli M. Does homeostasis model assessment of insulin resistance have a predictive value for post-coronary artery bypass grafting surgery outcomes? Braz J Cardiovasc Surg 2014; 29:360-6. [PMID: 25372910 PMCID: PMC4412326 DOI: 10.5935/1678-9741.20140105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 03/14/2014] [Indexed: 01/14/2023] Open
Abstract
Objective This study aims to investigate whether pre-operative Homeostasis Model Assessment
Insulin Resistance (HOMA-IR) value is a predictor in non-diabetic coronary artery
bypass grafting patients in combination with hemoglobin A1c, fasting blood glucose
and insulin levels. Methods Eighty one patients who were admitted to Cardiovascular Surgery Clinic at our
hospital between August 2012 and January 2013 with a coronary artery bypass
grafting indication were included. Patients were non-diabetic with <6.3%
hemoglobin A1c and were divided into two groups including treatment and control
groups according to normal insulin resistance (HOMA-IR<2.5, Group A; n=41) and
high insulin resistance (HOMA-IR>2.5, Group B; n=40), respectively.
Pre-operative fasting blood glucose and insulin were measured and serum chemistry
tests were performed. The Homeostasis Model Assessment Insulin Resistance values
were calculated. Statistical analysis was performed. Results There was a statistically significant difference in fasting blood glucose and
HOMA-IR values between the groups. Cross-clamping time, and cardiopulmonary bypass
time were longer in Group B, compared to Group A (P=0.043 and
P=0.031, respectively). Logistic regression analysis revealed
that hemoglobin A1c was not a reliable determinant factor alone for pre-operative
glucometabolic evaluation of non-diabetic patients. The risk factors of fasting
blood glucose and cardiopulmonary bypass time were more associated with high
Homeostasis Model Assessment Insulin Resistance levels. Conclusion Our study results suggest that preoperative screening of non-diabetic patients
with Homeostasis Model Assessment Insulin Resistance may improve both follow-up
visit schedule and short-term outcomes, and may be useful in risk stratification
of the high-risk population for impending health problems.
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Affiliation(s)
- Ebuzer Aydin
- Kartal Kosuyolu Training, Research Hospital Istanbul, Istanbul, Turkey
| | - Mehmet Ozkokeli
- Kartal Kosuyolu Training, Research Hospital Istanbul, Istanbul, Turkey
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Antihyperglycemic effect of syringic acid on attenuating the key enzymes of carbohydrate metabolism in experimental diabetic rats. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.bionut.2014.07.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Srinivasan MP, Kamath PK, Manjrekar PA, Unnikrishnan B, Ullal A, Kotekar MF, Mahabala C. Correlation of severity of coronary artery disease with insulin resistance. NORTH AMERICAN JOURNAL OF MEDICAL SCIENCES 2013; 5:611-4. [PMID: 24350075 PMCID: PMC3842704 DOI: 10.4103/1947-2714.120799] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Insulin resistance (IR) has known to be associated with coronary artery disease (CAD), but the assessment of severity of the CAD based on IR in type 2 diabetes mellitus has not been established in detail. AIMS The aim of our study was to establish the correlation between IR and the severity of CAD in type 2 diabetes mellitus. MATERIALS AND METHODS In a cross-sectional study design, 61 consecutive patients with type 2 diabetes mellitus who underwent coronary angiogram for the evaluation of CAD were recruited. Fasting blood glucose, fasting insulin levels, systolic blood pressure and total cholesterol/high density lipoprotein-cholesterol ratio were determined. Homeostasis model assessment-IR (HOMA-IR) was correlated with severity of CAD, which was measured by modified Gensini Score. RESULTS There was a significant correlation between log HOMA-IR and severity of CAD (r = 0.303, P = 0.009) in diabetic patients. Correlation of the Gensini Score with other known risk factors was not significant. CONCLUSIONS The results of our study indicate that we might able to predict the severity of CAD by measure of IR.
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Affiliation(s)
- Mukund P Srinivasan
- Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - Padmanabh K Kamath
- Department of Cardiology, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - Poornima A Manjrekar
- Department of Biochemistry, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - B Unnikrishnan
- Department of Community Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - Aishwarya Ullal
- Jr. Resident, Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - Mohammed Faheem Kotekar
- Jr. Resident, Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
| | - Chakrapani Mahabala
- Department of Internal Medicine, Kasturba Medical College, Manipal University, Mangalore, Karnataka, India
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Uzayisenga R, Ayeka PA, Wang Y. Anti-diabetic potential of Panax notoginseng saponins (PNS): a review. Phytother Res 2013; 28:510-6. [PMID: 23846979 DOI: 10.1002/ptr.5026] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 03/18/2013] [Accepted: 05/21/2013] [Indexed: 12/30/2022]
Abstract
Herbal medicines have traditionally played a major role in the management of diabetes in Asian countries for centuries. Panax notoginseng (Burk) F. H. Chen (Araliaceae) known as Tiánqī or san qi is a well-known medicinal herb in Asia for its long history of use in Chinese medicine. Qualified as 'the miracle root for the preservation of life', it has been used in China for 600 years, for treatment of various diseases. Panax notoginseng saponins (PNS) are the key active components. PNS have been widely used in China for treatment of cardiovascular diseases. However, scientific studies have shown a wide range of other pharmacological applications including anti-cancer, neuroprotective and anti-inflammatory agents, immunologic adjuvant and prevention of diabetes complications. Recently, hypoglycemic and anti-obesity properties of PNS have also been demonstrated. The present review highlights the effects of PNS on glucose production and absorption, and on inflammatory processes that seem to play an important role in the development of diabetes.
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Affiliation(s)
- Rosette Uzayisenga
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 88 Yuquan Road, Tianjin, 300193, PR China; District Pharmacy, Ministry of Health, P.O. Box 84, Kigali, Rwanda
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Murali R, Srinivasan S, Ashokkumar N. Antihyperglycemic effect of fraxetin on hepatic key enzymes of carbohydrate metabolism in streptozotocin-induced diabetic rats. Biochimie 2013; 95:1848-54. [PMID: 23806420 DOI: 10.1016/j.biochi.2013.06.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Accepted: 06/12/2013] [Indexed: 02/06/2023]
Abstract
Epidemiological studies have demonstrated that the diabetes mellitus is a serious health burden for both governments and healthcare providers. The present study was hypothesized to evaluate the antihyperglycemic potential of fraxetin by determining the activities of key enzymes of carbohydrate metabolism in streptozotocin (STZ) - induced diabetic rats. Diabetes was induced in male albino Wistar rats by intraperitoneal administration of STZ (40 mg/kg b.w). Fraxetin was administered to diabetic rats intra gastrically at 20, 40, 80 mg/kg b.w for 30 days. The dose 80 mg/kg b.w, significantly reduced the levels of blood glucose and glycosylated hemoglobin (HbA1c) and increased plasma insulin level. The altered activities of the key enzymes of carbohydrate metabolism such as glucokinase, glucose-6-phosphate dehydrogenase, glucose-6-phosphatase, fructose-1,6-bisphosphatase and hepatic enzymes (aspartate transaminase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP)) in the liver tissues of diabetic rats were significantly reverted to near normal levels by the administration of fraxetin. Further, fraxetin administration to diabetic rats improved body weight and hepatic glycogen content demonstrated its antihyperglycemic potential. The present findings suggest that fraxetin may be useful in the treatment of diabetes even though clinical studies to evaluate this possibility may be warranted.
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Affiliation(s)
- Raju Murali
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamilnadu, India
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Extract of Clinopodium chinense Inhibits High Glucose–Induced Apoptosis in Human Umbilical Vein Endothelial Cells. J Cardiovasc Pharmacol 2013. [DOI: 10.1097/fjc.0b013e31827d2a08] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Liu Z, Li W, Li X, Zhang M, Chen L, Zheng YN, Sun GZ, Ruan CC. Antidiabetic effects of malonyl ginsenosides from Panax ginseng on type 2 diabetic rats induced by high-fat diet and streptozotocin. JOURNAL OF ETHNOPHARMACOLOGY 2013; 145:233-240. [PMID: 23147499 DOI: 10.1016/j.jep.2012.10.058] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 09/18/2012] [Accepted: 10/27/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGY RELEVANCE Ginseng (Panax ginseng C. A. Meyer) has been recorded to treat 'Xiao-ke' (emaciation and thirst) symptom in many ancient Chinese medical literatures (such as 'Shen Nong Ben Cao Jing') for thousands of years. 'Xiao-ke' symptom, in general, indicates diabetes mellitus. AIM OF THE STUDY Malonyl ginsenosides (MGR) are natural ginsenosides which exist in both fresh and air-dried ginseng. The objective of this study is to determine the antidiabetic function of MGR on type 2 diabetes. MATERIALS AND METHODS High fat diet-fed and streptozotocin-induced diabetic rats were treated with 50 and 100mg/kg/d of MGR or vehicle for 3 weeks. The effects of MGR on fasting blood glucose (FBG), intraperitoneal glucose tolerance test (IPGTT), serum insulin (SI), insulin tolerance test (ITT), body weight, total cholesterol (TC), and triglyceride (TG) levels in type 2 diabetic rats were measured. RESULTS After 3 weeks of treatment, MGR administration showed significantly lower FBG levels compared to the diabetic control group. In glucose tolerance test, IPGTT data showed that both MGR 50 and 100mg/kg groups significantly increased the glucose disposal after glucose load. The ITT also showed improvement of insulin sensitivity during 120 min of insulin treatment. In addition, MGR reduced TG and TC contents while showed no effect on body weight in diabetic rats. CONCLUSION The findings from this study suggest that MGR can alleviate hyperglycemia, hyperlipemia and insulin resistance of type 2 diabetes.
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Affiliation(s)
- Zhi Liu
- Institute of Agricultural Modernization, Jilin Agricultural University, Changchun 130118, China
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Hypoglycemic effect of protopanaxadiol-type ginsenosides and compound K on Type 2 Diabetes mice induced by High-Fat Diet combining with Streptozotocin via suppression of hepatic gluconeogenesis. Fitoterapia 2012; 83:192-8. [DOI: 10.1016/j.fitote.2011.10.011] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2011] [Revised: 10/16/2011] [Accepted: 10/17/2011] [Indexed: 12/12/2022]
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