Protein Carbonyl Content in Erythrocyte Membranes in Type 2 Diabetic Patients

2002 ◽  
Vol 34 (7) ◽  
pp. 367-370 ◽  
Author(s):  
D. Konukoğlu ◽  
G. D. Kemerli ◽  
T. Sabuncu ◽  
H. H. Hatemi
Keyword(s):  
Protein Carbonyl ◽  
Erythrocyte Membranes ◽  
Diabetic Patients ◽  
Carbonyl Content ◽  
Type 2 Diabetic Patients ◽  
Protein Carbonyl Content ◽  
Type 2 Diabetic

Myricetin May Provide Protection against Oxidative Stress in Type 2 Diabetic Erythrocytes

2009 ◽  
Vol 64 (9-10) ◽  
pp. 626-630 ◽  
Author(s):  
Kanti Bhooshan Pandey ◽  
Neetu Mishra ◽  
Syed Ibrahim Rizvi
Keyword(s):  
Oxidative Stress ◽  
Biological Effects ◽  
Protein Carbonyl ◽  
In Vivo Studies ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Protein Carbonyl Content ◽  
Type 2 Diabetic

Oxidative stress is believed to be a major contributing factor in the development of late complications of diabetes. Many in vitro and in vivo studies have demonstrated that several parameters of red blood cell function and integrity are negatively affected by increased oxidative stress. Plant polyphenols are reported to exert many biological effects due to their antioxidant property. The present study was undertaken to evaluate the antioxidant effect of myricetin on markers of oxidative stress in erythrocytes from type 2 diabetic patients. The study was carried out on blood samples obtained from 23 type 2 diabetic patients and 23 age-matched control subjects. Erythrocytes were subjected to in vitro oxidative stress by incubating with 10-5 M tert-butyl hydroperoxide (t-BHP). Erythrocyte membrane lipid peroxidation and protein oxidation were measured in terms of malondialdehyde (MDA) and protein carbonyl group levels. The results showed an elevated MDA and protein carbonyl content in diabetic erythrocytes which were further increased after incubation with t-BHP. Myricetin at micromolar concentration significantly (p < 0.01) protected an t-BHP-induced increase in levels of oxidative stress parameters of diabetic erythrocytes

scholarly journals STUDY OF RELATIONSHIP BETWEEN THE PROTEIN OXIDATION MARKERS AND ADIPOKINES IN OBESE TYPE 2 DIABETIC PATIENTS

2019 ◽  
pp. 204-209 ◽  
Author(s):  
SUKHPAL SINGH ◽  
AMITA MAHAJAN ◽  
JASPREET KAUR
Keyword(s):  
Blood Glucose ◽  
Protein Oxidation ◽  
Fasting Blood Glucose ◽  
Protein Carbonyl ◽  
Postprandial Blood Glucose ◽  
Diabetic Patients ◽  
Model Assessment ◽  
Type 2 Diabetic Patients ◽  
Type 2 Diabetic

Objective: This study was done to explore the correlation if any, between obesity markers adiponectin, leptin, and protein oxidative stress (OS) status in obese with and without type 2 diabetic mellitus (T2DM) patients. Methods: In the present study, 30 healthy subjects, 30 obese non-diabetics, and 30 obese T2DM patients were enrolled. Protein OS parameters such as advanced oxidation of protein products (AOPPs) and protein carbonyl (PC) were estimated. Serum leptin, adiponectin, and insulin levels were measured by ELISA. Results: The AOPP, PC, leptin, leptin adiponectin ratio (LAR), insulin, and homeostasis model assessment of insulin resistance (HOMA-IR) levels were significantly higher in obese non-diabetic and obese T2DM as compared to healthy control (p<0.001). However, serum adiponectin levels were significantly lower in obese non-diabetic and obese T2DM as compared to control (p<0.001). HOMA-IR and LAR both the index of IR were increased in obese non-diabetic and obese T2DM. Positive correlations were observed for AOPP with body mass index, PC in obese non-diabetic and with fasting blood glucose, postprandial blood glucose, HOMA-IR, and PC in obese T2DM. A negative correlation was found between PC and adiponectin in obese non-diabetic and obese T2DM. A significant inverse correlation was obtained between leptin and adiponectin in obese T2DM only. Conclusion: The present study suggested that increased protein OS, hyperinsulinemia, and hyperleptinemia may lead to hypoadiponectinemia in obese with and without T2DM. Moreover, determination of protein oxidation markers can be useful for monitoring the dysregulation of adipokines and glucose metabolism in obesity and T2DM.

Vitamin D3 supplementation improves glycemic control in type 2 diabetic patients: Results from an Italian clinical trial

2020 ◽  
pp. 1-10
Author(s):  
Giuseppe Derosa ◽  
Angela D’Angelo ◽  
Chiara Martinotti ◽  
Maria Chiara Valentino ◽  
Sergio Di Matteo ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Metabolic Control ◽  
Vitamin D3 ◽  
Therapy Group ◽  
Hypoglycemic Agents ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Type 2 Diabetic

Abstract. Background: to evaluate the effects of Vitamin D3 on glyco-metabolic control in type 2 diabetic patients with Vitamin D deficiency. Methods: one hundred and seventeen patients were randomized to placebo and 122 patients to Vitamin D3. We evaluated anthropometric parameters, glyco-metabolic control, and parathormone (PTH) value at baseline, after 3, and 6 months. Results: a significant reduction of fasting, and post-prandial glucose was recorded in Vitamin D3 group after 6 months. A significant HbA1c decrease was observed in Vitamin D3 (from 7.6% or 60 mmol/mol to 7.1% or 54 mmol) at 6 months compared to baseline, and to placebo (p < 0.05 for both). At the end of the study period, we noticed a change in the amount in doses of oral or subcutaneous hypoglycemic agents and insulin, respectively. The use of metformin, acarbose, and pioglitazone was significantly lower (p = 0.037, p = 0.048, and p = 0.042, respectively) than at the beginning of the study in the Vitamin D3 therapy group. The units of Lispro, Aspart, and Glargine insulin were lower in the Vitamin D3 group at the end of the study (p = 0.031, p = 0.037, and p = 0.035, respectively) than in the placebo group. Conclusions: in type 2 diabetic patients with Vitamin D deficiency, the restoration of value in the Vitamin D standard has led not only to an improvement in the glyco-metabolic compensation, but also to a reduced posology of some oral hypoglycemic agents and some types of insulin used.

Evaluation of aortic arch calcification in type 2 diabetic patients

VASA ◽  
2005 ◽  
Vol 34 (2) ◽  
pp. 113-117 ◽  
Author(s):  
Papanas ◽  
Symeonidis ◽  
Maltezos ◽  
Giannakis ◽  
Mavridis ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Aortic Arch ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Insulin Dependence ◽  
Artery Disease ◽  
Type 2 Diabetic ◽  
Aortic Arch Calcification

Background: The purpose of this study is to evaluate the severity of aortic arch calcification among type 2 diabetic patients in association with diabetes duration, diabetic complications, coronary artery disease and presence of cardiovascular risk factors. Patients and methods: This study included 207 type 2 diabetic patients (101 men) with a mean age of 61.5 ± 8.1 years and a mean diabetes duration of 13.9 ± 6.4 years. Aortic arch calcification was assessed by means of posteroanterior chest X-rays. Severity of calcification was graded as follows: grade 0 (no visible calcification), grade 1 (small spots of calcification or single thin calcification of the aortic knob), grade 2 (one or more areas of thick calcification), grade 3 (circular calcification of the aortic knob). Results: Severity of calcification was grade 0 in 84 patients (40.58%), grade 1 in 64 patients (30.92%), grade 2 in 43 patients (20.77%) and grade 3 in 16 patients (7.73%). In simple regression analysis severity of aortic arch calcification was associated with age (p = 0.032), duration of diabetes (p = 0.026), insulin dependence (p = 0.042) and presence of coronary artery disease (p = 0.039), hypertension (p = 0.019), dyslipidaemia (p = 0.029), retinopathy (p = 0.012) and microalbuminuria (p = 0.01). In multiple regression analysis severity of aortic arch calcification was associated with age (p = 0.04), duration of diabetes (p = 0.032) and presence of hypertension (p = 0.024), dyslipidaemia (p = 0.031) and coronary artery disease (p = 0.04), while the association with retinopathy, microalbuminuria and insulin dependence was no longer significant. Conclusions: Severity of aortic arch calcification is associated with age, diabetes duration, diabetic complications (retinopathy, microalbuminuria), coronary artery disease, insulin dependence, and presence of hypertension and dyslipidaemia.

The Effect of Insulin Treatment on the Balance between Tissue Plasminogen Activator and Plasminogen Activator Inhibitor-1 in Type 2 Diabetic Patients

1992 ◽  
Vol 68 (03) ◽  
pp. 253-256 ◽  
Author(s):  
Thomas Vukovich ◽  
Sylvia Proidl ◽  
Paul Knöbl ◽  
Harald Teufelsbauer ◽  
Christoph Schnack ◽  
...  
Keyword(s):  
Plasminogen Activator ◽  
Insulin Treatment ◽  
Plasminogen Activator Inhibitor ◽  
Diabetic Patients ◽  
Plasminogen Activator Inhibitor 1 ◽  
Type 2 Diabetic Patients ◽  
Glycemic Regulation ◽  
Type 2 Diabetic ◽  
Pai 1

SummaryBeside hypercoagulation and hyperactivated platelets disturbances of the fibrinolytic system towards hypofibrinolysis have been reported to be associated with both glycemic and lipidemic derangement in diabetic patients. In the present prospective follow-up study the effect of 16 weeks insulin treatment and glycemic regulation on plasma levels of tissue plasminogen activator (tPA) and plasminogen activator inhibitor-1 (PAI-1), the main regulators of fibrinolysis, was investigated in 19 type-2 diabetic patients with secondary failure to sulphonylureas. A similar glycemic regulation was obtained in a control group of 10 type 2 diabetic patients with sufficient metabolic response to strict dietary treatment and continuation of sulphonylurea treatment. Compared to 27 healthy subjects levels of tPA and PAI-1 were not significantly increased in type 2 diabetic patients before metabolic intervention. Although a hypofibrinolytic state due to an increase of PAI-1 levels was previously reported in obese hyperinsulinemic patients, no effect of insulin treatment on both tPA- and PAI-1 levels was observed in the present study including patients with only slightly increased body mass index (median 26.0 kg/m2). By correlation analysis PAI-1 levels were significantly related to serum cholesterol (R = 0.52) and glycemic control (glucose R = 0.41) in the whole group of diabetic patients at entry and in both subgroups after 16 weeks of treatment (insulin group: cholesterol R = 0.46, HbA1c R = 0.51; sulphonylurea group: cholesterol R = 0.59, HbA1c R = 0.58). In healthy subjects tPA and PAI-1 was correlated to serum insulin (R = 0.54, R = 0.56) and triglycerides (R = 0.46, R = 0.40). In conclusion, our results indicate that insulin treatment associated with metabolic improvement has no adverse effect to fibrinolysis in type 2 diabetic patients.

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