scholarly journals Dietary Polyphenols, Mediterranean Diet, Prediabetes, and Type 2 Diabetes: A Narrative Review of the Evidence

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Marta Guasch-Ferré ◽  
Jordi Merino ◽  
Qi Sun ◽  
Montse Fitó ◽  
Jordi Salas-Salvadó
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Mediterranean Diet ◽  
Prospective Studies ◽  
Food Sources ◽  
Dietary Polyphenols ◽  
Beneficial Effects ◽  
The Mediterranean ◽  
Polyphenol Intake

Dietary polyphenols come mainly from plant-based foods including fruits, vegetables, whole grains, coffee, tea, and nuts. Polyphenols may influence glycemia and type 2 diabetes (T2D) through different mechanisms, such as promoting the uptake of glucose in tissues, and therefore improving insulin sensitivity. This review aims to summarize the evidence from clinical trials and observational prospective studies linking dietary polyphenols to prediabetes and T2D, with a focus on polyphenol-rich foods characteristic of the Mediterranean diet. We aimed to describe the metabolic biomarkers related to polyphenol intake and genotype-polyphenol interactions modulating the effects on T2D. Intakes of polyphenols, especially flavan-3-ols, and their food sources have demonstrated beneficial effects on insulin resistance and other cardiometabolic risk factors. Several prospective studies have shown inverse associations between polyphenol intake and T2D. The Mediterranean diet and its key components, olive oil, nuts, and red wine, have been inversely associated with insulin resistance and T2D. To some extent, these associations may be attributed to the high amount of polyphenols and bioactive compounds in typical foods conforming this traditional dietary pattern. Few studies have suggested that genetic predisposition can modulate the relationship between polyphenols and T2D risk. In conclusion, the intake of polyphenols may be beneficial for both insulin resistance and T2D risk.

scholarly journals The influence of the Mediterranean diet on glucose metabolism

2021 ◽  
Vol 11 (9) ◽  
pp. 430-433
Author(s):  
Katarzyna Mielniczek
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Glucose Metabolism ◽  
Olive Oil ◽  
Mediterranean Diet ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
Dietary Polyphenols ◽  
The Mediterranean

Introduction: Insulin resistance is the first stage of diabetes development. It has been defined as a dysmetabolic state in which the biological response of target tissues (particularly liver, muscle and adipose tissue) to circulating insulin is impaired. This leads to hyperinsulinemia, which in turn leads to obesity and type 2 diabetes (T2D). The basic ingredients of the Mediterranean diet, such as fruit, vegetables, fish rich in fat, extra virgin olive oil, tree nuts, red wine, have been defined in the functional food model by the natural content of nutraceuticals such as polyphenols, terpenoids, flavonoids, alkaloids, sterols and unsaturated fatty acids. Purpose of the work : Demonstrate the beneficial effects of implementing the Mediterranean diet in patients with insulin resistance or type 2 diabetes. The appropriate samples were accessed using a search engine in the PubMed database. The reviews and meta-analyzes published over the last 10 years were used. Results: After changing the diet to a diet rich in these nutrients, a greater improvement in IR was shown in obese people compared to other diets. In addition, dietary polyphenols demonstrated clinically significant benefits in metabolic and microvascular functions leading to lowering of fasting cholesterol and glucose, and anti-inflammatory and antioxidant properties in high-risk and T2DM patients. Conclusions: Mediterranean diets with the addition of extra virgin olive oil or nuts reduced total body weight and improved glucose metabolism.

The Mediterranean Diet and Two-Year Changes in Cognitive Function in Puerto Rican Adults With vs. Without Type 2 Diabetes

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 192-LB
Author(s):  
JOSIEMER MATTEI ◽  
SHERMAN J. BIGORNIA ◽  
MERCEDES SOTOS-PRIETO ◽  
TAMMY SCOTT ◽  
XIANG GAO ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Cognitive Function ◽  
Puerto Rican ◽  
Mediterranean Diet ◽  
The Mediterranean

The Mediterranean diet and risk of type 2 diabetes in Iranian population

2018 ◽  
Vol 73 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Sajjad Khalili-Moghadam ◽  
Parvin Mirmiran ◽  
Zahra Bahadoran ◽  
Fereidoun Azizi
Keyword(s):  
Type 2 Diabetes ◽  
Mediterranean Diet ◽  
Iranian Population ◽  
The Mediterranean

scholarly journals Mediterranean Diet Effects on Type 2 Diabetes Prevention, Disease Progression, and Related Mechanisms. A Review

Nutrients ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2236 ◽  
Author(s):  
Sandra Martín-Peláez ◽  
Montse Fito ◽  
Olga Castaner
Keyword(s):  
Type 2 Diabetes ◽  
Mediterranean Diet ◽  
Healthy Lifestyle ◽  
Diabetes Type 2 ◽  
Antioxidant Compounds ◽  
Published Evidence ◽  
Quality Diet ◽  
The Mediterranean ◽  
Traditional Mediterranean Diet

The search for a quality diet has grown over the past decade. Diet is considered one of the pillars for the prevention and progression of several diseases, among them: diabetes. Type 2 diabetes (T2D) is an epidemic of western countries that increases the vulnerability of other diseases, such as cardiovascular and cancer. T2D is associated with lifestyle and diet. The traditional Mediterranean diet has proven its benefits over several cardiovascular risk factors, and specifically on diabetes. This review compiles recent published evidence on the effects of the Mediterranean diet on the incidence and progression of type 2 diabetes (T2D) and its relation with several other cardiovascular healthy diets. We will also focus on how the Mediterranean diet could play a role in T2D-related mechanisms, such as anti-inflammatory or antioxidant compounds, glucagon-like peptide agonist compounds, and changes in gut microbiota. Each component of the Mediterranean diet could be involved in processes related to diabetes homeostasis, many of them sharing common physio-pathological pathways. The importance of this diet within the set of habits of a healthy lifestyle must be emphasized.

scholarly journals The Role of PGC-1α in the Development of Insulin Resistance in Skeletal Muscle - Revisited

2015 ◽  
Vol 37 (6) ◽  
pp. 2288-2296 ◽  
Author(s):  
Bartlomiej Łukaszuk ◽  
Krzysztof Kurek ◽  
Agnieszka Mikłosz ◽  
Małgorzata Żendzian-Piotrowska ◽  
Adrian Chabowski
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Skeletal Muscle ◽  
Medical Condition ◽  
Accumulation Rate ◽  
Common Denominator ◽  
Net Energy ◽  
Physically Active ◽  
Beneficial Effects

Currently, obesity is a predominant medical condition and an important risk factor for the development of several diseases, including type 2 diabetes mellitus. Importantly, most research has indicated lipid-induced insulin resistance in skeletal muscles is a key link between the aforementioned pathological conditions. PGC-1α is a prominent regulator of myocellular energy metabolism orchestrating gene transcription programming in response to numerous environmental stimuli. Moreover, it is widely acknowledged that mitochondrial metabolism (primary metabolic target of PGC-1α) disturbances are widely acknowledged contributors to type 2 diabetes development. Therefore, it seems surprising that the exact physiological contribution of PGC-1α in the development of insulin resistance in skeletal muscle remains poorly understood. This review aims to reconcile these allegedly different findings by looking for a common denominator in the role(s) of PGC-1α in respect to lipid-induced insulin resistance in skeletal muscle. Our scrutiny of the literature indicates that interventions at the level of PGC-1α may exert beneficial effects on myocytes in respect to lipid-induced insulin resistance. The latter takes place as a result of a positive net energy balance (fatty acids oxidation surpassing their accumulation rate). Moreover, the aforementioned effects may not necessarily be limited to physically active states. They seem to occur, however, only within a physiologically observed range in muscle cells (approximately 1-fold changes in PGC-1α protein expression).

scholarly journals Glycolysis/gluconeogenesis- and tricarboxylic acid cycle–related metabolites, Mediterranean diet, and type 2 diabetes

2020 ◽  
Vol 111 (4) ◽  
pp. 835-844 ◽  
Author(s):  
Marta Guasch-Ferré ◽  
José L Santos ◽  
Miguel A Martínez-González ◽  
Clary B Clish ◽  
Cristina Razquin ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Relative Risk ◽  
Mediterranean Diet ◽  
Tca Cycle ◽  
Tricarboxylic Acid ◽  
Model Assessment ◽  
Weighted Score

ABSTRACT Background Glycolysis/gluconeogenesis and tricarboxylic acid (TCA) cycle metabolites have been associated with type 2 diabetes (T2D). However, the associations of these metabolites with T2D incidence and the potential effect of dietary interventions remain unclear. Objectives We aimed to evaluate the association of baseline and 1-y changes in glycolysis/gluconeogenesis and TCA cycle metabolites with insulin resistance and T2D incidence, and the potential modifying effect of Mediterranean diet (MedDiet) interventions. Methods We included 251 incident T2D cases and 638 noncases in a nested case-cohort study within the PREDIMED Study during median follow-up of 3.8 y. Participants were allocated to MedDiet + extra-virgin olive oil, MedDiet + nuts, or control diet. Plasma metabolites were measured using a targeted approach by LC–tandem MS. We tested the associations of baseline and 1-y changes in glycolysis/gluconeogenesis and TCA cycle metabolites with subsequent T2D risk using weighted Cox regression models and adjusting for potential confounders. We designed a weighted score combining all these metabolites and applying the leave-one-out cross-validation approach. Results Baseline circulating concentrations of hexose monophosphate, pyruvate, lactate, alanine, glycerol-3 phosphate, and isocitrate were significantly associated with higher T2D risk (17–44% higher risk for each 1-SD increment). The weighted score including all metabolites was associated with a 30% (95% CI: 1.12, 1.51) higher relative risk of T2D for each 1-SD increment. Baseline lactate and alanine were associated with baseline and 1-y changes of homeostasis model assessment of insulin resistance. One-year increases in most metabolites and in the weighted score were associated with higher relative risk of T2D after 1 y of follow-up. Lower risks were observed in the MedDiet groups than in the control group although no significant interactions were found after adjusting for multiple comparisons. Conclusions We identified a panel of glycolysis/gluconeogenesis-related metabolites that was significantly associated with T2D risk in a Mediterranean population at high cardiovascular disease risk. A MedDiet could counteract the detrimental effects of these metabolites. This trial was registered at controlled-trials.com as ISRCTN35739639.

scholarly journals May the Mediterranean diet attenuate the risk of type 2 diabetes associated with obesity: the Seguimiento Universidad de Navarra (SUN) cohort

2017 ◽  
Vol 117 (10) ◽  
pp. 1478-1485 ◽  
Author(s):  
Sonia Eguaras ◽  
Maira Bes-Rastrollo ◽  
Miguel Ruiz-Canela ◽  
Silvia Carlos ◽  
Pedro de la Rosa ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Adverse Effects ◽  
Mediterranean Diet ◽  
Weight Changes ◽  
Product Term ◽  
Hazard Ratios ◽  
The Mediterranean ◽  
Incident Cases

AbstractIt is likely that the Mediterranean diet (MedDiet) may mitigate the adverse effects of obesity on the incidence of type 2 diabetes mellitus (T2DM). We assessed this hypothesis in a cohort of 18 225 participants initially free of diabetes (mean age: 38 years, 61 % women). A validated semi-quantitative 136-item FFQ was used to assess dietary intake and to build a 0–9 score of adherence to MedDiet. After a median of 9·5-year follow-up, 136 incident cases of T2DM were confirmed during 173 591 person-years follow-up. When MedDiet adherence was low (≤4 points), the multivariable-adjusted hazard ratios (HR) were 4·07 (95 % CI 1·58, 10·50) for participants with BMI 25–29·99 kg/m2 and 17·70 (95 % CI 6·29, 49·78) kg/m2 for participants with BMI≥30 kg/m2, (v.<25 kg/m2). In the group with better adherence to the MedDiet (>4 points), these multivariable-adjusted HR were 3·13 (95 % CI 1·63, 6·01) and 10·70 (95 % CI 4·98, 22·99) for BMI 25–30 and ≥30 kg/m2, respectively. The P value for the interaction was statistically significant (P=0·002). When we assessed both variables (BMI and MedDiet) as continuous, the P value for their interaction product-term was marginally significant (P=0·051) in fully adjusted models. This effect modification was not explained by weight changes during follow-up. Our results suggest that the MedDiet may attenuate the adverse effects of obesity on the risk of T2DM.

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