Obesity and diabetes: lipids, ‘nowhere to run to'

2008 ◽  
Vol 116 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Margaret J. Hill ◽  
David Metcalfe ◽  
Philip G. McTernan
Keyword(s):  
Short Review ◽  
Therapeutic Strategies ◽  
Cellular Systems ◽  
Ectopic Fat ◽  
Central Adiposity ◽  
Disease Pathogenesis ◽  
Fat Accumulation ◽  
Obesity And Diabetes

Although specific pathogenic entities contributing to diabetic risk, such as central adiposity, ectopic fat accumulation, hyperlipidaemia and inflammation, are well-characterized, the response of cellular systems to such insults are less well understood. This short review highlights the effect of increasing fat mass on ectopic fat accumulation, the role of triacylglycerols (triglycerides) in Type 2 diabetes mellitus and cardiovascular disease pathogenesis, and selected current therapeutic strategies used to ameliorate these risk factors.

scholarly journals Role of folate in nonalcoholic fatty liver disease

2017 ◽  
Vol 95 (10) ◽  
pp. 1141-1148 ◽  
Author(s):  
Victoria Sid ◽  
Yaw L. Siow ◽  
Karmin O
Keyword(s):  
Type 2 Diabetes ◽  
Liver Disease ◽  
Fatty Liver ◽  
Nonalcoholic Fatty Liver Disease ◽  
Fatty Liver Disease ◽  
Serum Folate ◽  
Nonalcoholic Fatty Liver ◽  
Obesity And Diabetes

Nonalcoholic fatty liver disease (NAFLD) is a spectrum of chronic liver conditions that are characterized by steatosis, inflammation, fibrosis, and liver injury. The global prevalence of NAFLD is rapidly increasing in proportion to the rising incidence of obesity and type 2 diabetes. Because NAFLD is a multifaceted disorder with many underlying metabolic abnormalities, currently, there is no pharmacological agent that is therapeutically approved for the treatment of this disease. Folate is a water-soluble B vitamin that plays an essential role in one-carbon transfer reactions involved in nucleic acid biosynthesis, methylation reactions, and sulfur-containing amino acid metabolism. The liver is the primary organ responsible for storage and metabolism of folates. Low serum folate levels have been observed in patients with obesity and diabetes. It has been reported that a low level of endogenous folates in rodents perturbs folate-dependent one-carbon metabolism, and may be associated with development of metabolic diseases such as NAFLD. This review highlights the biological role of folate in the progression of NAFLD and its associated metabolic complications including obesity and type 2 diabetes. Understanding the role of folate in metabolic disease may position this vitamin as a potential therapeutic for NAFLD.

P–100 Metabolic, hormonal, and inflammatory status in sub-fertile men with obesity and diabetes

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
S Abbasihormozi ◽  
A Kouhkan ◽  
A Shahverdi ◽  
A Parhizkar ◽  
Z Zolfaghary ◽  
...  
Keyword(s):  
Semen Analysis ◽  
Metabolic Changes ◽  
Semen Parameters ◽  
Computer Assisted ◽  
Obesity And Diabetes ◽  
Hormonal Dysfunction ◽  
Hs Crp ◽  
Type 2 Diabetic

Abstract Study question To evaluate the association between sperm functionality parameters and biochemical, hormonal, and inflammatory indices in obese and diabetic men. Summary answer Metabolic changes,hormonal dysfunction,and the presence of inflammatory mediators might be considered possible mechanisms in the development of sub-fertility in obese and diabetic sub-fertile men What is known already Although the higher prevalence of subfertility in obese and diabetic men during the reproductive age is evident, the mechanisms by which obesity and diabetes mellitus (DM) cause male infertility are not entirely understood. Several pathways might be involved in the role of obesity in semen quality, thereby inducing alterations in hormonal profiles, abnormal lipid metabolism, and possibly the formation of inflammatory cytokines, ultimately leading to impaired sperm function Study design, size, duration We enrolled normal weight (BMI<25 kg/m2) and non-type–2 diabetic (control=40), obese and non- type–2 diabetic (obese=40), non-obese and type–2 diabetic (Lean-DM=35), and obese and type–2 diabetic (Obese-DM=35) sub-fertile men, aged 20–50 years, referring to Royan infertility clinic (Tehran, Iran) from March to September 2014 Participants/materials, setting, methods After enrollment and receiving informed consent, all men underwent face-to-face private interviews. The obesity-associated markers, insulin resistance, beta-cell function, hormonal and lipid profile, inflammatory indices, and semen analysis were assessed in four experimental groups. Semen analysis was examined after 2–5 days of sexual analysis).abstinence based on WHO-recommended methods by CASA system (computer-assisted sperm Main results and the role of chance Main results and the role of chance: Our finding showed that diabetic markers were significantly increased in two diabetic groups, while obesity indices were markedly increased in two obese groups. Conventional sperm parameters were significantly lower in obese DM, lean DM, and obese groups compared with the control (p < 0.05). Serum levels of total testosterone (TT) and sex hormone-binding globulin (SHBG) were significantly lower in men with obesity and DM compared with the control (p < 0.05).There was a significant difference in the concentration of high-sensitivity C-reactive protein (hs-CRP) among four experimental groups. Moreover, serum leptin was significantly increased in obese DM, lean DM, and obese groups. Serum insulin levels had a positive correlation with metabolic-associated indices (WC, BMI, FBS,HbA1c,and HOMA-IR), as well as hs-CRP levels, whereas it had a negative correlation with count, motility, and morphology. There is also a negative association between metabolic-associated indices (WC, BMI, FBS, HbA1c, and HOMA-IR) and semen parameters. Limitations, reasons for caution It was better to evaluate inflammatory biomarkers be examined in other tissues Wider implications of the findings: The results of this study demonstrated the association of metabolic changes, hormonal dysfunction, and inflammatory responses with the semen parameters of sub-fertile men with obesity and diabete. Trial registration number Not applicable

Transcriptome of the subcutaneous adipose tissue in response to oral supplementation of type 2 Leprdb obese diabetic mice with niacin-bound chromium

2006 ◽  
Vol 27 (3) ◽  
pp. 370-379 ◽  
Author(s):  
Cameron Rink ◽  
Sashwati Roy ◽  
Savita Khanna ◽  
Trenton Rink ◽  
Debasis Bagchi ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Blood Glucose ◽  
Specific Gene ◽  
Oral Glucose ◽  
Diabetic Mice ◽  
Fat Tissue ◽  
Obesity And Diabetes ◽  
Brown Adipose

The effects of oral niacin-bound chromium (NBC) supplementation on the subcutaneous fat tissue of type 2 Lepr db obese diabetic mice were examined using high-density comprehensive mouse genome (45,101 probe sets) expression arrays. The influence of such supplementation on the plasma cardiovascular risk factors of these mice was also investigated. Supplementation of NBC had no significant effect on age-dependent weight gain in the Lepr db obese diabetic mice. However, NBC lowered total cholesterol (TC), TC-to-HDL ratio, LDL cholesterol, and triglyceride levels while increasing HDL cholesterol in the blood plasma. No effect of NBC supplementation was observed on fasting blood glucose levels. Oral glucose tolerance test revealed a significantly improved clearance of blood glucose between 1 and 2 h of glucose challenge in NBC-supplemented mice. Unbiased genome-wide interrogation demonstrated that NBC resulted in the upregulation of muscle-specific gene expression in the fat tissue. Genes encoding proteins involved in glycolysis, muscle contraction, muscle metabolism, and muscle development were specifically upregulated in response to NBC supplementation. Genes in the adipose tissue that were downregulated in response to NBC supplementation included cell death-inducing DNA fragmentation factor (CIDEA) and uncoupling protein-1, which represent key components involved in the thermogenic role of brown adipose tissue and tocopherol transfer protein, the primary carrier of α-tocopherol to adipose tissue. The observation that CIDEA-null mice are resistant to obesity and diabetes suggests that the inhibitory role of NBC on CIDEA expression was favorable. Further studies testing the molecular basis of NBC function and long-term outcomes are warranted.

scholarly journals Does microRNA Perturbation Control the Mechanisms Linking Obesity and Diabetes? Implications for Cardiovascular Risk

2020 ◽  
Vol 22 (1) ◽  
pp. 143
Author(s):  
Lucia La Sala ◽  
Maurizio Crestani ◽  
Silvia Garavelli ◽  
Paola de Candia ◽  
Antonio E. Pontiroli
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Obesity And Diabetes ◽  
Extracellular Mirnas ◽  
Antioxidant Defense Systems ◽  
Non Coding Rnas ◽  
Molecular Aspects ◽  
Mirnas Expression

Metabolic disorders such as obesity and type 2 diabetes (T2D) are considered the major risk factors for the development of cardiovascular diseases (CVD). Although the pathological mechanisms underlying the mutual development of obesity and T2D are difficult to define, a better understanding of the molecular aspects is of utmost importance to identify novel therapeutic targets. Recently, a class of non-coding RNAs, called microRNAs (miRNAs), are emerging as key modulators of metabolic abnormalities. There is increasing evidence supporting the role of intra- and extracellular miRNAs as determinants of the crosstalk between adipose tissues, liver, skeletal muscle and other organs, triggering the paracrine communication among different tissues. miRNAs may be considered as risk factors for CVD due to their correlation with cardiovascular events, and in particular, may be related to the most prominent risk factors. In this review, we describe the associations observed between miRNAs expression levels and the most common cardiovascular risk factors. Furthermore, we sought to depict the molecular aspect of the interplay between obesity and diabetes, investigating the role of microRNAs in the interorgan crosstalk. Finally, we discussed the fascinating hypothesis of the loss of protective factors, such as antioxidant defense systems regulated by such miRNAs.

scholarly journals A double-blind, placebo-controlled, randomised trial to assess the effect of liraglutide on ectopic fat accumulation in South Asian type 2 diabetes patients

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Huub J. van Eyk ◽  
Elisabeth H. M. Paiman ◽  
Maurice B. Bizino ◽  
Paul de Heer ◽  
Petronella H. Geelhoed-Duijvestijn ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
South Asian ◽  
Randomised Trial ◽  
Ectopic Fat ◽  
Double Blind ◽  
Fat Accumulation ◽  
Double Blind Placebo ◽  
Diabetes Patients

scholarly journals The new views on the state of the gut microbiota in obesity and diabetes mellitus type 2

2019 ◽  
Vol 22 (3) ◽  
pp. 253-262
Author(s):  
Elena V. Pokrovskaya ◽  
Minara S. Shamkhalova ◽  
Marina V. Shestakova
Keyword(s):  
Diabetes Mellitus ◽  
Gut Microbiota ◽  
Human Body ◽  
Diabetes Mellitus Type 2 ◽  
Metabolic Disorders ◽  
Developed Countries ◽  
Diabetes Mellitus Type ◽  
Obesity And Diabetes

Obesity is a worldwide problem of the last century, the prevalence of which has reached pandemic proportions in developed countries. Over the past few years, a considerable amount of data has been gathered, reporting a direct link between changes in gut microbiota and the development of obesity, as well as related diseases, primarily, diabetes mellitus type 2. The elaboration of optimal methods of prevention and treatment regimens of these diseases needs to structure the existing knowledge about the mechanisms of development of metabolic disorders, the role of intestinal microbiota in the latter and possible therapeutic targets. This review examines the role of microorganisms in the human body, with the main focus on the developmental origins of metabolic disorders using animal models and accumulated experience of research on their effects on the human body, and also discusses possible treatment options, including bariatric surgery, fecal microbiota transplantation, the use of pre- and probiotics and certain particular groups of glucose-lowering drugs.

scholarly journals Intercellular Spread of Protein Aggregates in Neurodegenerative Disease

2018 ◽  
Vol 34 (1) ◽  
pp. 545-568 ◽  
Author(s):  
Albert A. Davis ◽  
Cheryl E.G. Leyns ◽  
David M. Holtzman
Keyword(s):  
Neurodegenerative Diseases ◽  
Protein Aggregation ◽  
Neurodegenerative Disease ◽  
Extracellular Space ◽  
Protein Aggregates ◽  
Therapeutic Strategies ◽  
Disease Pathogenesis ◽  
Donor Cells ◽  
Intercellular Spread

Most neurodegenerative diseases are characterized by the accumulation of protein aggregates, some of which are toxic to cells. Mounting evidence demonstrates that in several diseases, protein aggregates can pass from neuron to neuron along connected networks, although the role of this spreading phenomenon in disease pathogenesis is not completely understood. Here we briefly review the molecular and histopathological features of protein aggregation in neurodegenerative disease, we summarize the evidence for release of proteins from donor cells into the extracellular space, and we highlight some other mechanisms by which protein aggregates might be transmitted to recipient cells. We also discuss the evidence that supports a role for spreading of protein aggregates in neurodegenerative disease pathogenesis and some limitations of this model. Finally, we consider potential therapeutic strategies to target spreading of protein aggregates in the treatment of neurodegenerative diseases.

Phenotypical heterogeneity linked to adipose tissue dysfunction in patients with Type 2 diabetes

2016 ◽  
Vol 130 (19) ◽  
pp. 1753-1762 ◽  
Author(s):  
Ilaria Barchetta ◽  
Francesco Angelico ◽  
Maria Del Ben ◽  
Michele Di Martino ◽  
Flavia Agata Cimini ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Adipose Tissue ◽  
Insulin Secretion ◽  
Fat Deposition ◽  
Metabolic Phenotype ◽  
Ectopic Fat ◽  
Model Assessment ◽  
Fat Accumulation

Adipose tissue (AT) inflammation leads to increased free fatty acid (FFA) efflux and ectopic fat deposition, but whether AT dysfunction drives selective fat accumulation in specific sites remains unknown. The aim of the present study was to investigate the correlation between AT dysfunction, hepatic/pancreatic fat fraction (HFF, PFF) and the associated metabolic phenotype in patients with Type 2 diabetes (T2D). Sixty-five consecutive T2D patients were recruited at the Diabetes Centre of Sapienza University, Rome, Italy. The study population underwent clinical examination and blood sampling for routine biochemistry and calculation of insulin secretion [homoeostasis model assessment of insulin secretion (HOMA-β%)] and insulin-resistance [homoeostasis model assessment of insulin resistance (HOMA-IR) and adipose tissue insulin resistance (ADIPO-IR)] indexes. Subcutaneous (SAT) and visceral (VAT) AT area, HFF and PFF were determined by magnetic resonance. Some 55.4% of T2D patients had non-alcoholic fatty liver disease (NAFLD); they were significantly younger and more insulin-resistant than non-NAFLD subjects. ADIPO-IR was the main determinant of HFF independently of age, sex, HOMA-IR, VAT, SAT and predicted severe NAFLD with the area under the receiver operating characteristic curve (AUROC)=0.796 (95% confidence interval: 0.65–0.94, P=0.001). PFF was independently associated with increased total adiposity but did not correlate with AT dysfunction, insulin resistance and secretion or NAFLD. The ADIPO-IR index was capable of predicting NAFLD independently of all confounders, whereas it did not seem to be related to intrapancreatic fat deposition; unlike HFF, higher PFF was not associated with relevant alterations in the metabolic profile. In conclusion, the presence and severity of AT dysfunction may drive ectopic fat accumulation towards specific targets, such as VAT and liver, therefore evaluation of AT dysfunction may contribute to the identification of different risk profiles among T2D patients.

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