scholarly journals Role of Exercise-Induced Calmodulin Protein Kinase (CaMK)II Activation in the Regulation of Omega-6 Fatty Acids and Lipid Metabolism Genes in Rat Skeletal Muscle

2017 ◽  
pp. 969-977 ◽  
Author(s):  
J. S. JOSEPH ◽  
A. O. AYELESO ◽  
E. MUKWEVHO
Keyword(s):  
Type 2 Diabetes ◽  
Skeletal Muscle ◽  
Fatty Acids ◽  
Lipid Metabolism ◽  
Rat Skeletal Muscle ◽  
Exercise Induced ◽  
Diabetes And Obesity ◽  
Camkii Activation

Activation of calmodulin dependent protein kinase (CaMK)II by exercise is beneficial in controlling membrane lipids associated with type 2 diabetes and obesity. Regulation of lipid metabolism is crucial in the improvement of type 2 diabetes and obesity associated symptoms. The role of CaMKII in membrane associated lipid metabolism was the focus of this study. Five to six weeks old male Wistar rats were used in this study. GC×GC-TOFMS technique was used to determine the levels of polyunsaturated fatty acids (linoleic acid, arachidonic acid and 11,14-eicosadienoic acid). Carnitine palmitoyltransferase (Cpt-1) and acetyl-CoA carboxylase (Acc-1) genes expression were assessed using quantitative real time PCR (qPCR). From the results, CaMKII activation by exercise increased the levels of arachidonic acid and 11,14-eicosadienoic acid while a decrease in the level of linolenic acid was observed in the skeletal muscle. The results indicated that exercise-induced CaMKII activation increased CPT-1 expression and decreased ACC-1 expression in rat skeletal muscle. All the observed increases with activation of CaMKII by exercise were aborted when KN93, an inhibitor of CaMKII was injected in exercising rats. This study demonstrated that CaMKII activation by exercise regulated lipid metabolism. This study suggests that CaMKII can be a vital target of therapeutic approach in the management of diseases such as type 2 diabetes and obesity that have increased to epidemic proportions recently.

scholarly journals Diacylglycerol kinase-δ regulates AMPK signaling, lipid metabolism, and skeletal muscle energetics

2016 ◽  
Vol 310 (1) ◽  
pp. E51-E60 ◽  
Author(s):  
Lake Q. Jiang ◽  
Thais de Castro Barbosa ◽  
Julie Massart ◽  
Atul S. Deshmukh ◽  
Lars Löfgren ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Skeletal Muscle ◽  
Signal Transduction ◽  
Lipid Metabolism ◽  
Lipid Oxidation ◽  
Diacylglycerol Kinase ◽  
Muscle Energetics ◽  
Ampk Signaling

Decrease of AMPK-related signal transduction and insufficient lipid oxidation contributes to the pathogenesis of obesity and type 2 diabetes. Previously, we identified that diacylglycerol kinase-δ (DGKδ), an enzyme involved in triglyceride biosynthesis, is reduced in skeletal muscle from type 2 diabetic patients. Here, we tested the hypothesis that DGKδ plays a role in maintaining appropriate AMPK action in skeletal muscle and energetic aspects of contraction. Voluntary running activity was reduced in DGKδ+/−mice, but glycogen content and mitochondrial markers were unaltered, suggesting that DGKδ deficiency affects skeletal muscle energetics but not mitochondrial protein abundance. We next determined the role of DGKδ in AMPK-related signal transduction and lipid metabolism in isolated skeletal muscle. AMPK activation and signaling were reduced in DGKδ+/−mice, concomitant with impaired lipid oxidation and elevated incorporation of free fatty acids into triglycerides. Strikingly, DGKδ deficiency impaired work performance, as evident by altered force production and relaxation dynamics in response to repeated contractions. In conclusion, DGKδ deficiency impairs AMPK signaling and lipid metabolism, thereby highlighting the deleterious role of excessive lipid metabolites in the development of peripheral insulin resistance and type 2 diabetes pathogenesis. DGKδ deficiency also influences skeletal muscle energetics, which may lead to low physical activity levels in type 2 diabetes.

scholarly journals Gut as an emerging organ for the treatment of diabetes: focus on mechanism of action of bariatric and endoscopic interventions

2018 ◽  
Vol 237 (1) ◽  
pp. R1-R17 ◽  
Author(s):  
Martin Haluzík ◽  
Helena Kratochvílová ◽  
Denisa Haluzíková ◽  
Miloš Mráz
Keyword(s):  
Type 2 Diabetes ◽  
Bariatric Surgery ◽  
Therapeutic Option ◽  
Gastrointestinal Hormones ◽  
Less Invasive ◽  
Treatment Of Diabetes ◽  
Endoscopic Methods ◽  
Diabetes And Obesity

Increasing worldwide prevalence of type 2 diabetes mellitus and its accompanying pathologies such as obesity, arterial hypertension and dyslipidemia represents one of the most important challenges of current medicine. Despite intensive efforts, high percentage of patients with type 2 diabetes does not achieve treatment goals and struggle with increasing body weight and poor glucose control. While novel classes of antidiabetic medications such as incretin-based therapies and gliflozins have some favorable characteristics compared to older antidiabetics, the only therapeutic option shown to substantially modify the progression of diabetes or to achieve its remission is bariatric surgery. Its efficacy in the treatment of diabetes is well established, but the exact underlying modes of action are still only partially described. They include restriction of food amount, enhanced passage of chymus into distal part of small intestine with subsequent modification of gastrointestinal hormones and bile acids secretion, neural mechanisms, changes in gut microbiota and many other possible mechanisms underscoring the importance of the gut in the regulation of glucose metabolism. In addition to bariatric surgery, less-invasive endoscopic methods based on the principles of bariatric surgery were introduced and showed promising results. This review highlights the role of the intestine in the regulation of glucose homeostasis focusing on the mechanisms of action of bariatric and especially endoscopic methods of the treatment of diabetes. A better understanding of these mechanisms may lead to less invasive endoscopic treatments of diabetes and obesity that may complement and widen current therapeutic options.

Screening of secondary metabolites, bioactive compounds, in vitro antioxidant, antibacterial, antidiabetic and anti-inflammatory activities of chia seeds (Salvia hispanica L.)

2021 ◽  
pp. 6289-6294
Author(s):  
Saffiya Banu. A ◽  
Sheila John ◽  
Sarah Jane Monica ◽  
Saraswathi. K ◽  
Arumugam. P
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Fatty Acids ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Type 2 Diabetes Mellitus ◽  
Dpph Radical ◽  
Anti Inflammatory

Recent research studies indicate the role of functional foods in preventing the development of complications associated with type 2 diabetes mellitus. Chia seeds are an excellent source of dietary fibre, essential fatty acids, micronutrients and non-nutritive components. The objective of the study was to evaluate the antioxidant, antibacterial, antidiabetic and anti-inflammatory potential of chia seeds. TPC and TFC were estimated using Folin-Ciocalteu Reagent and Alumininum Chloride method. The antioxidant activity was determined using DPPH● radical, ABTS●+ radical, Superoxide (O2-) radical, Fe3+ reducing and phosphomolybdenum reduction assay. Agar well diffusion method was used to determine the antibacterial activity against Escherichia coli, Proteus vulgaris, Shigella flexneri, Micrococcus luteus, Bacillus subtilis and Staphylococcus aureus. Antidiabetic and anti-inflammatory activities were evaluated using alpha amylase inhibition assay and heat induced haemolysis method. Volatile functional compounds were identified using Gas chromatography mass spectrometry. Upon quantification, TPC and TFC were found to be 850.67±14.14µg/mg GAE and 171.21±12.86µg/mg QE. Free radical scavenging activity of chia seeds was ranked in the order of DPPH● radical >ABTS●+ radical > Superoxide (O2-) radical. The capability of chia seeds to function as electron donors was evident through its strong reducing power. With regard to antibacterial activity, maximum inhibition was observed for Staphylococcus aureus, with a zone of inhibition of 31mm at 500µg/mL. Results of antidiabetic assay highlighted the alpha amylase inhibitory action of chia seeds with an IC50 value of 121.46µg/mL. The anti-inflammatory activity of chia seeds increased linearly in a dose dependent manner. GC-MS analysis showed the presence of functionally active compounds such as coumarine, napthoquinone, phytol, fatty acids, flavone and flavone derivatives. Findings of the study highlight that chia seeds have several essential therapeutic properties. Furthermore, clinical studies are required to validate the role of chia seeds in preventing the development of complications associated with type 2 diabetes mellitus.

scholarly journals Increased Expression of Meteorin-Like Hormone in Type 2 Diabetes and Obesity and Its Association with Irisin

Cells ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1283 ◽  
Author(s):  
AlKhairi ◽  
Cherian ◽  
Abu-Farha ◽  
Madhoun ◽  
Nizam ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Plasma Levels ◽  
Positive Association ◽  
Diabetic Patients ◽  
Metabolic Dysregulation ◽  
Strong Positive Association ◽  
Metabolic Biomarkers ◽  
Diabetes And Obesity

Type 2 diabetes (T2D) is a growing pandemic associated with metabolic dysregulation and chronic inflammation. Meteorin-like hormone (METRNL) is an adipomyokine that is linked to T2D. Our objective was to evaluate the changes in METRNL levels in T2D and obesity and assess the association of METRNL levels with irisin. Overall, 228 Arab individuals were enrolled. Plasma levels of METRNL and irisin were assessed using immunoassay. Plasma levels of METRNL and irisin were significantly higher in T2D patients than in non-diabetic patients (p < 0.05). When the population was stratified based on obesity, METRNL and irisin levels were significantly higher in obese than in non-obese individuals (p < 0.05). We found a significant positive correlation between METRNL and irisin (r = 0.233 and p = 0.001). Additionally, METRNL and irisin showed significant correlation with various metabolic biomarkers associated with T2D and Obesity. Our data shows elevated METRNL plasma levels in individuals with T2D, further exacerbated with obesity. Additionally, a strong positive association was observed between METRNL and irisin. Further studies are necessary to examine the role of these proteins in T2D and obesity, against their ethnic background and to understand the mechanistic significance of their possible interplay.

scholarly journals The role of nonesterified fatty acids in pathogenesis of cardiovascular diseases

2010 ◽  
Vol 16 (1) ◽  
pp. 93-103 ◽  
Author(s):  
M. V. Tsvetkova ◽  
V. N. Khirmanov ◽  
N. N. Zybina
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Fatty Acids ◽  
Type 2 Diabetes Mellitus ◽  
Adipose Tissue ◽  
Risk Factor ◽  
Cardiovascular Diseases ◽  
Sudden Death

The paper reviews publications concerned the role of nonesterifi ed fatty acids (NEFA) in pathogenesis of cardiovascular diseases. NEFAs are four and more carbons chain length carbonic acids and they are presented in free form (nonesterifi ed) in human body. Plasma NEFAs are produced by the adipose tissue triglyceride lipolysis, another source are lipoproteins such as chylomicrons, very low density lipoproteins and intermediate density lipoproteins. Elevated NEFA concentrations in plasma are the risk factor of cardiovascular diseases and type 2 diabetes mellitus and the independent risk factor of hypertension and sudden death. NEFA plasma concentration is elevated in atherosclerosis, acute myocardial infarction, diabetes mellitus, obesity, hypertension, and often in metabolic syndrome. A probable cause of NEFAs accumulation in plasma may be overeating and low physical activity, which result in increase of adipose tissue mass, lipolysis intensifi cation and elevation of NEFAs concentration in plasma. The role of elevated plasma NEFA concentration in a number of conditions (abdominal obesity, atherogenic dyslipidemia, insulin resistance, type 2 diabetes mellitus, endothelial dysfunction, vascular infl ammation, atherosclerosis, hypertension, ischemic heart disease, rhythm disturbances, sudden death) and possible ways of their correction are discussed.

scholarly journals The role of the lipotoxicity in the pathogenesis of type 2 diabetes mellitus and obesity

2014 ◽  
Vol 11 (2) ◽  
pp. 8-12 ◽  
Author(s):  
F R Abdulkadirova ◽  
A S Ametov ◽  
E V Doskina ◽  
R A Pokrovskaya
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Fatty Acids ◽  
Type 2 Diabetes Mellitus ◽  
Diabetes Mellitus Type 2 ◽  
Comorbid Conditions ◽  
Fatty Acids Metabolism

Obesity is a major risk factor for diabetes mellitus type 2, cardiovascular diseases and associated comorbid conditions. It is traditionally considered that insulin resistance is dependent on glucose metabolism. However, in recent years more and more attention is devoted to the fatty acids metabolism, the increase in concentrations of which plays a significant role in the pathophysiological mechanisms associated with insulin resistance.

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