Socioeconomic Status: The Missing Link Between Obesity and Diabetes Mellitus?

BACKGROUND: Currently, there is an epidemic expansion of obesity rates worldwide. The increasing number of obese individuals associated with the aging of population leads to increasing number of individuals with type 2 diabetes mellitus (T2DM) at the same rate. The traditional factors that link obesity to T2DM are related to genetics, hypercaloric diet, sedentary lifestyle, and stress. Individuals from lower Socioeconomic Status (SES) have restricted autonomy and opportunities that could lead to more stress and consequently increase in stress hormones, such as cortisol, catecholamines, glucagon, and growth hormone, which might ultimately change fat deposition, increasing visceral fat and increasing the risk of T2DM development. METHODS: We conducted a review of the literature on the effects of low SES and the risk of developing T2DM in obese persons. RESULTS: 191 studies were found. The obesity of lower SES individuals is more central than that for individuals from higher socioeconomic position. It is also proposed that the quality of food seems to be lower, with more intake of fat and simple carbohydrates and less of fruits, vegetables and whole wheat bread, in the more disadvantaged social classes. The lower income neighborhoods, without exercise facilities and unsafety are also associated with higher indices of physical inactivity. Cross sectional and prospective studies confirm the relationship between lower socioeconomic status and obesity and diabetes. The lower SES is associated to metabolic implications that are linked to insulin resistance and possibly may also interfere with the ability of beta cell to secrete insulin and change the gut microbiota, increasing even more the future risk of developing diabetes.

Neck Circumference and its Correlation to Other Anthropometric Parameters and Finnish Diabetes Risk Score (FINDRISC).

BACKGROUND: The Neck Circumference (NC) is an anthropometric measure to evaluate obesity. The FINDRISC predicts the risk of developing type 2 diabetes mellitus. Our aims were to identify the mean value of NC in individuals with higher (≥15 points) and lower FINDRISC and to establish cutoff values that indicate individuals with higher FINDRISC. METHODS: It is a population-based, cross-sectional study representative of the city of Curitiba, Brazil. We studied individuals (>18 years), without diabetes mellitus, between August 2013 and August 2014. We evaluated anthropometric parameters, glycaemia, socioeconomic situation, chronic conditions, and their risk factors. In a sex-specific analysis, data are presented as mean and standard deviation. We performed Pearson's and Spearman's correlation between NC and the waist circumference, body mass index and FINDRISC. Receiver Operating Characteristic curves were estimated for NC and higher FINDRISC. Logistic regression models were built to analyze the association between higher FINDRISC and 1-SD increase in NC. RESULTS: We studied 950 individuals (621 women) with a mean age of 47.4 ± 17.6 years and body mass index of 26.2 ± 5.6 kg/m2. The mean NCs were 34.1 ± 3.1 cm in women and 38.2 ± 3.5 cm in men. Mean NC was lower in women (33.7 ± 2.9 cm vs. 35.8 ± 3.2 cm) and men (37.7 ± 3.4 cm vs. 41 ± 3.6 cm) with lower FINDRISC (p <0.001). All the correlations with NC were significant (p ≤ 0.001). The area under the curve for NC and the higher FINDRISC was 0.702 (95% CI 0.653 - 0.752) for women and 0.762 for men (95% CI 0.679 - 0.845), determining the best cutoff value of 34.5 cm for women and 39.5 cm for men to discriminate individuals with higher FINDRISC. Fully adjusted odds ratios for higher FINDRISC per 1-SD increase in NC in women and men were, respectively 1.89 (95% CI 1.53 - 2.33) and 2.86 (95% CI 1.91 - 4.29). CONCLUSION: NC is positively correlated to the body mass index, waist circumference, glycaemia, and FINDRISC scores in a population-based sample of adults. We identified the mean values of NC in higher and lower FINDRISC and established cutoff values for NC and higher FINDRISC.

Current management of diabetic patients with kidney disease: a renal­cardio­endocrine perspective.

Diabetic kidney disease (DKD) is one of the most frequent and dangerous complications of diabetes mellitus type 2, affecting about one­third of the patients. DKD results in increased hospitalizations and mortality rates, especially due to cardiovascular complications. This high burden of kidney disease is mainly due to the increasing complexity of in- outpatient care for patients with DM. There is a strikingly complex interaction of kidney dysfunction with many aspects of diabetes care, such as redefinition of targets of treatment, interactions of traditional and non­traditional risk factors, and pharmacological issues related to pharmacokinetic and side effects of drugs. Particularly when not carefully managed, DKD increases the demand for renal replacement therapies, such as dialysis and kidney transplants. The combined economic and social costs of this disease are high and of concern to the world's health systems. The main objective of this review is to provide insight into the recommendations for the evaluation and stratification of DKD and how the presence of kidney disease changes the optimal management of diabetic patients from an integrated renal­cardio­endocrine perspective.

Decrease in leptin production by the adipose tissue in obesity associated with severe metabolic syndrome.

OBJECTIVE: To evaluate the associations between leptinemia and the components of metabolic syndrome (MetS). METHODS: Fifty-one obese adults (9 men; 36.7 +/- 10.0 years; body mass index (BMI) 46.2 +/- 10.0 kg/m(2)) were submitted to clinical examination, determinations of body fat mass (BF, bioimpedance) and resting energy expenditure (REE, indirect calorimetry), and to hormonal and biochemical analysis. Patients were categorized into three groups, according to the number of criteria for MetS: Group I: none or 1; Group II: 2; and Group III: 3 or 4 criteria. RESULTS: Absolute leptinemia (LepA; 37.5 +/- 16.9 ng/mL) was directly correlated with BMI (r = 0.48; p = 0.0004), waist circumference (r = 0.31; p = 0.028) and BF (r = 0.52; p = 0.0001). Leptinemia adjusted for BF (LepBF) was inversely correlated with weight (r = -0.41; p=0.027), REE (r = -0.34; p = 0.01) and number of MetS criteria (r = -0.32; p = 0.02). There was no difference in LepA among the groups. LepBF in Group III (0.58 +/- 0.27 ng/mL/kg) was significantly lower compared to Group I (0.81 +/- 0.22 ng/mL/kg; p = 0.03) and Group II (0.79 +/- 0.30 ng/mL/kg; p = 0.02). CONCLUSIONS: Leptin production by the adipose tissue is decreased in obese subjects fulfilling three or more criteria of MetS, suggesting a state of relative leptin deficiency in obesity associated with advanced stages of MetS.

Decrease in leptin production by the adipose tissue in obesity associated with severe metabolic syndrome / Diminuição da produção de leptina pelo tecido adiposo na obesidade associada à síndrome metabólica severa

OBJECTIVE: To evaluate the associations between leptinemia and the components of metabolic syndrome (MetS). METHODS: Fifty-one obese adults (9 men; 36.7 ± 10.0 years; body mass index (BMI) 46.2 ± 10.0 kg/m²) were submitted to clinical examination, determinations of body fat mass (BF, bioimpedance) and resting energy expenditure (REE, indirect calorimetry), and to hormonal and biochemical analysis. Patients were categorized into three groups, according to the number of criteria for MetS: Group I: none or 1; Group II: 2; and Group III: 3 or 4 criteria. RESULTS: Absolute leptinemia (LepA; 37.5 ± 16.9 ng/mL) was directly correlated with BMI (r = 0.48; p = 0.0004), waist circumference (r = 0.31; p = 0.028) and BF (r = 0.52; p = 0.0001). Leptinemia adjusted for BF (LepBF) was inversely correlated with weight (r = -0.41; p=0.027), REE (r = -0.34; p = 0.01) and number of MetS criteria (r = -0.32; p = 0.02). There was no difference in LepA among the groups. LepBF in Group III (0.58 ± 0.27 ng/mL/kg) was significantly lower compared to Group I (0.81 ± 0.22 ng/mL/kg; p = 0.03) and Group II (0.79 ± 0.30 ng/mL/kg; p = 0.02). CONCLUSIONS: Leptin production by the adipose tissue is decreased in obese subjects fulfilling three or more criteria of MetS, suggesting a state of relative leptin deficiency in obesity associated with advanced stages of MetS.

OBJETIVO: Avaliar as associações entre leptinemia e os componentes da síndrome metabólica (MetS). MÉTODOS: Cinquenta e um adultos obesos (9 homens, 36,7 ± 10,0 anos, índice de massa corpórea, IMC, 46,2 ± 10,0 kg/m²) foram submetidos à avaliação clínica, a determinações da massa adiposa (BF, bioimpedância) e do gasto energético basal (REE, calorimetria indireta) e a análises hormonais e bioquímicas. Os pacientes foram divididos em três grupos, de acordo com o numero de critérios para MetS: Grupo I, nenhum ou 1; Grupo II: 2; e Grupo III: 3 ou 4 critérios. RESULTADOS: A leptinemia absoluta (LepA; 37,5 ± 16,9 ng/mL) se correlacionou diretamente a IMC (r = 0,48; p = 0,0004), circunferência abdominal (r = 0,31; p = 0,028) e BF (r = 0,52; p = 0,0001). A leptinemia ajustada por BF (LepBF) se correlacionou inversamente ao peso (r = -0,41; p = 0,027), ao REE (r = -0,34; p = 0,01) e ao número de critérios para MetS (r = -0,32; p = 0,02). Não houve diferença de LepA entre os grupos. LepBF no Grupo III (0,58 ± 0,27 ng/mL/kg) foi significativamente menor que no Grupo I (0,81 ± 0,22 ng/mL/kg; p = 0,03) e II (0,79 ± 0,30 ng/mL/kg; p = 0,02). CONCLUSÕES: A produção de leptina pelo tecido adiposo está diminuída em pacientes obesos que preenchem três ou mais critérios para MetS, sugerindo um estado de deficiência relativa de leptina na obesidade associada a estágios avançados de MetS.