scholarly journals Effects of Pioglitazone on Ventricular Myocyte Shortening and Ca2+ Transport in the Goto-Kakizaki Type 2 Diabetic Rat

2018 ◽  
pp. 57-68 ◽  
Author(s):  
K. A. SALEM ◽  
V. SYDORENKO ◽  
M. QURESHI ◽  
M. OZ ◽  
F. C. HOWARTH
Keyword(s):  
Ventricular Myocytes ◽  
Cellular Level ◽  
Diabetic Rat ◽  
Antidiabetic Agent ◽  
Inotropic Effects ◽  
And Control ◽  
Transmembrane Currents ◽  
Negative Inotropic Effects ◽  
Type 2 Diabetic

Pioglitazone (PIO) is a thiazolidindione antidiabetic agent which improves insulin sensitivity and reduces blood glucose in experimental animals and treated patients. At the cellular level the actions of PIO in diabetic heart are poorly understood. A previous study has demonstrated shortened action potential duration and inhibition of a variety of transmembrane currents including L-type Ca2+ current in normal canine ventricular myocytes. The effects of PIO on shortening and calcium transport in ventricular myocytes from the Goto-Kakizaki (GK) type 2 diabetic rat have been investigated. 10 min exposure to PIO (0.1-10 µM) reduced the amplitude of shortening to similar extents in ventricular myocytes from GK and control rats. 1 μM PIO reduced the amplitude of the Ca2+ transients to similar extents in ventricular myocytes from GK and control rats. Caffeine-induced Ca2+ release from the sarcoplasmic reticulum and recovery of Ca2+ transients following application of caffeine and myofilament sensitivity to Ca2+ were not significantly altered in ventricular myocytes from GK and control rats. Amplitude of L-type Ca2+ current was not significantly decreased in myocytes from GK compared to control rats and by PIO treatment. The negative inotropic effects of PIO may be attributed to a reduction in the amplitude of the Ca2+ transient however, the mechanisms remain to be resolved.

scholarly journals Reduction in the Amplitude of Shortening and Ca2+ Transient by Phlorizin and Quercetin-3-O-Glucoside in Ventricular Myocytes From Streptozotocin-Induced Diabetic Rats

2016 ◽  
pp. 239-250 ◽  
Author(s):  
N. N. HAMOUDA ◽  
M. A. QURESHI ◽  
J. M. ALKAABI ◽  
M. OZ ◽  
F. C. HOWARTH
Keyword(s):  
Diabetes Mellitus ◽  
Blood Glucose ◽  
Sarcoplasmic Reticulum ◽  
Ventricular Myocytes ◽  
Diabetic Rats ◽  
Ventricular Myocyte ◽  
Inotropic Effects ◽  
Cardiovascular Morbidity And Mortality ◽  
And Control ◽  
Negative Inotropic Effects

Diabetes mellitus is the leading cause of cardiovascular morbidity and mortality. Phlorizin (PHLOR) and quercetin-3-O-glucoside (QUER-3-G) are two natural compounds reported to have antidiabetic properties by inhibiting sodium/glucose transporters. Their effects on ventricular myocyte shortening and intracellular Ca2+ in streptozotocin (STZ)-induced diabetic rats were investigated. Video edge detection and fluorescence photometry were used to measure ventricular myocyte shortening and intracellular Ca2+, respectively. Blood glucose in STZ rats was 4-fold higher (469.64±22.23 mg/dl, n=14) than in Controls (104.06±3.36 mg/dl, n=16). The amplitude of shortening was reduced by PHLOR in STZ (84.76±2.91 %, n=20) and Control (83.72±2.65 %, n=23) myocytes, and by QUER-3-G in STZ (79.12±2.28 %, n=20) and Control (76.69±1.92 %, n=30) myocytes. The amplitude of intracellular Ca2+ was also reduced by PHLOR in STZ (82.37±3.16 %, n=16) and Control (73.94±5.22 %, n=21) myocytes, and by QUER-3-G in STZ (73.62±5.83 %, n=18) and Control (78.32±3.54 %, n=41) myocytes. Myofilament sensitivity to Ca2+ was not significantly altered by PHLOR; however, it was reduced by QUER-3-G modestly in STZ myocytes and significantly in Controls. PHLOR and QUER-3-G did not significantly alter sarcoplasmic reticulum Ca2+ in STZ or Control myocytes. Altered mechanisms of Ca2+ transport partly underlie PHLOR and QUER-3-G negative inotropic effects in ventricular myocytes from STZ and Control rats.

scholarly journals An anxiolytic drug buspirone ameliorates hyperglycemia and endothelial dysfunction in type 2 diabetic rat model

2020 ◽  
Vol 45 (4) ◽  
pp. 397-404
Author(s):  
Tugba Gurpinar Çavuşoğlu ◽  
Ertan Darıverenli ◽  
Kamil Vural ◽  
Nuran Ekerbicer ◽  
Cevval Ulman ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Blood Glucose ◽  
Endothelial Dysfunction ◽  
Vascular Function ◽  
Fasting Blood Glucose ◽  
Diabetic Rats ◽  
Diabetic Rat ◽  
Insulin Levels ◽  
Type 2 Diabetic

AbstractObjectivesType 2 diabetes is a common metabolic disease and anxiety disorders are very common among diabetics. Buspirone is used in the treatment of anxiety, also having blood glucose-lowering effects. The aim of the study was to investigate the effects of buspirone on the glucose and lipid metabolism as well as vascular function in type 2 diabetic rats.MethodsA type 2-diabetic model was induced through a high-fat diet for eight weeks followed by the administration of low-dose streptozotocin (35 mg/kg, intraperitoneal) in rats. Buspirone was given at two different doses (1.5 mg/kg/d and 5 mg/kg/d) and combined with metformin (300 mg/kg/d). The fasting glucose and insulin levels, lipid profile were analyzed, and vascular response measured from the thoracic aorta was also evaluated.ResultsBoth doses of buspirone caused a significant improvement in fasting blood glucose levels. In particular, the buspirone treatment, combined with metformin, improved endothelial dysfunction and was found to be correlated with decreased nitrate/nitrite levels.ConclusionsBuspirone may be effective in the treatment of type 2 diabetes, either alone or in combination with other treatments, particularly in terms of endothelial dysfunction, inflammation and impaired blood glucose, and insulin levels.

scholarly journals COMP-Angiopoietin-1 Promotes Cavernous Angiogenesis in a Type 2 Diabetic Rat Model

2013 ◽  
Vol 28 (5) ◽  
pp. 725 ◽  
Author(s):  
Sun-Ouck Kim ◽  
Hyun-Suk Lee ◽  
Kyuyoun Ahn ◽  
Kwangsung Park
Keyword(s):  
Rat Model ◽  
Diabetic Rat ◽  
Diabetic Rat Model ◽  
Type 2 Diabetic ◽  
Angiopoietin 1

scholarly journals The Effect of Resistance Training on G6Pase Gene Expression in Liver Hepatocytes, Glucose and Insulin Resistance Levels in Type 2 Diabetic Rats

2020 ◽  
Author(s):  
Ahmad Shokrolahi Ardakani ◽  
Hossein Abednatanzi ◽  
Mandana Gholami ◽  
Nader Shakeri
Keyword(s):  
Resistance Training ◽  
Training Group ◽  
Liver Cells ◽  
Diabetic Rats ◽  
Exercise Session ◽  
P Value ◽  
Insulin Levels ◽  
And Control ◽  
Type 2 Diabetic

Objective: The aim of this study was to determine the effect of 12 weeks resistance training on G6Pase expression in liver cells, as well as glucose and insulin levels in type 2 diabetic rats. Materials and Methods: In this experimental study, 16 wistar rats were selected as the research sample. After injection of nicotinamide and streptozocin to induce diabetes, the rats were randomly divided into two groups of resistance training and control. The resistance group participated in a course of resistance training for up to 12 week in five sessions per week, with intensity of 75% and a time of 30 to 45 minutes. Finally, 48 hours after the last exercise session, G6Pase expression in liver cells, as well as glucose and insulin levels were measured in both groups. Results: Comparison of resistance and control training groups showed a decrease in glucose levels (P-value= 0.001) and increased insulin levels (P-value= 0.001). Exercise also reduced the expression of G6Pase in liver cells in the resistance training group (P-value= 0.001). Conclusion: Based on the results of the study, it is recommended that diabetics use resistance training under the supervision of a specialist to reduce the negative effects of diabetes.  

scholarly journals Reduced Serum Adiponectin Levels in Type 2 Diabetic Patients in Zaria

2018 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Serum Adiponectin ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Mean Values ◽  
Control Subjects ◽  
Type 2 Dm ◽  
And Control ◽  
Biochemical Assessment ◽  
Type 2 Diabetic

Background: Adiponectin is a collagen-like plasma protein secreted by adipocytes that has been suggested to play a causal role in the development of insulin resistance. Even though hypoadiponectinaemia is reported to be closely associated with obesity-related diseases such as ACVD, type 2 DM, dyslipidaemia, report from our environment is lacking. Materials and Methods: Serum adiponectin, insulin and glucose were measured in 90 type 2 diabetic and control subjects respectively. The patients were known diabetics attending the diabetic clinic at the ABUTH, Zaria. The control subjects were apparently healthy individuals within the hospital and Zaria environs. Results: Mean serum adiponectin levels were significantly lower (P<0.05) in the diabetic patients than in the control subjects. On the other hand, the mean values of insulin and glucose were significantly higher (P<0.05) in the diabetic patients than in the controls. Conclusion: Measurement of serum adiponectin as an adjunct in the biochemical assessment of type 2 DM is suggested.

scholarly journals Visceral Hypersensitivity and Altered Colonic Motility in Type 2 Diabetic Rat

2015 ◽  
Vol 21 (4) ◽  
pp. 581-588 ◽  
Author(s):  
Tae Sik Sung ◽  
Jun-Ho La ◽  
Tong Mook Kang ◽  
Tae Wan Kim ◽  
Il-Suk Yang
Keyword(s):  
Colonic Motility ◽  
Visceral Hypersensitivity ◽  
Diabetic Rat ◽  
Type 2 Diabetic

Investigating ADAMTS7 and ADAMTS12 levels in prediabetic and Type 2 diabetic patients

2021 ◽  
Author(s):  
Mercan Taştemur ◽  
Selvihan Beysel ◽  
Sema Hepşen ◽  
Sanem Öztekin ◽  
Erman Çakal ◽  
...  
Keyword(s):  
Inflammatory Markers ◽  
Diabetic Patients ◽  
Control Groups ◽  
Type 2 Diabetic Patients ◽  
Human Enzyme ◽  
Significant Difference ◽  
And Control ◽  
Type 2 Diabetic

Background: This study aims to investigate the role of ADAMTS7 and ADAMTS12 on atherosclerosis and inflammation in prediabetic and diabetic patients. Patients & methods: Serum ADAMTS7 and ADAMTS12 levels were compared with the atherosclerotic and inflammatory markers in diabetic (n = 65, female 30.9%, mean age = 53 years), prediabetic (n = 55, female 36.6%, mean age = 49 years) and control groups (n = 55, females 32.5%, mean age = 49 years). Serum ADAMTS levels were determined by a human enzyme-liked immunoassay. Results: In terms of ADAMTS7, there was no significant difference between diabetic, prediabetic and control groups (50.93, 44.34, 59.07, respectively; p > 0.05). ADAMTS12 is lower in diabetics (p < 0.05), whereas it is similar in prediabetics and controls (14.53, 20.76, 25.05, respectively; p > 0.05). ADAMTS7 and ADAMTS12 levels did not differ in diabetic nephropathy, retinopathy and neuropathy (p > 0.05). Conclusion: While ADAMTS12 was significantly lower in diabetics and prediabetics, ADAMTS7 and ADAMTS12 were not related to diabetic complications (nephropathy, retinopathy and neuropathy).

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