RESUMO
Several reports agreed that the antecedent markers for developing diabetes in offspring of type 2 diabetic patients involve excess body weight and insulin resistance. This study examined the pattern of changes in anthropometric and biochemical risk factors for developing diabetes in a follow-up offspring of Caribbean type 2 diabetic patients. Results of 46 offspring of type 2 diabetic patients who had received one-to-one individualized diet and exercise counseling for 5 years in our laboratory were analyzed. Changes in anthropometric (body weight, waist circumference) and biochemical (insulin, glucose, lipids, HOMA-insulin resistance, HOMA-percent beta-cell function) parameters over the 5-year period were analyzed using ANOVA tests. Of the 46 offspring, 10.9 and 2.2%, respectively, developed impaired glucose tolerance (IGT) and diabetes. Over the years, IGT offspring had a significant step-wise increase and decrease in fasting and 2-h postprandial plasma glucose levels (P < 0.05) and percent B-cell function (P < 0.001), respectively. Again, a non-significant step-wise increase was observed in body mass index, waist circumference and HOMA-insulin resistance levels (P > 0.05). While we await the results of medication-based intervention studies in different populations, exercise and diet counseling will remain the only available lifestyle intervention strategy for slowing IGT progression to diabetes.
Assuntos
Diabetes Mellitus Tipo 2/fisiopatologia , Intolerância à Glucose/fisiopatologia , Adulto , Glicemia , Peso Corporal , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/genética , Saúde da Família , Seguimentos , Intolerância à Glucose/sangue , Intolerância à Glucose/genética , Humanos , Insulina/sangue , Lipídeos/sangue , Fatores de Risco , Trinidad e Tobago , Relação Cintura-QuadrilRESUMO
The E23K variant of the Kir6.2 gene has been shown to be associated with type 2 diabetes mellitus in Caucasian subjects. Because offspring of type 2 diabetic patients have a genetically increased risk of developing diabetes, we sought to identify the E23K variant of the Kir6.2 gene in offspring of Caribbean patients with type 2 diabetes and assess the contribution of this variant to impaired glucose tolerance in these subjects. Forty-six offspring of patients with type 2 diabetes and 39 apparently healthy subjects whose immediate parents were not diabetic ('control') were studied after an overnight fast. Anthropometric indices were measured and blood samples were collected. Fasting and 2 h plasma glucose, insulin and lipids were subsequently determined. Insulin resistance was calculated using the homeostatic model assessment technique. The offspring and control subjects had similar frequencies of the E23K polymorphism (52.6 vs 45.5%, P>0.05) and the frequency of the E23K variant did not differ significantly between gender and ethnic distributions, irrespectively of a family history of diabetes (P>0.05). There were no significant differences in biochemical risk factors for developing diabetes in offspring carriers of the E23K variant compared with offspring non-carriers of the mutation. Offspring with the E23K mutation had even significantly higher 2 h insulin concentrations when compared with control subjects. It is concluded that the presence of the Kir6.2 E23K genotype in Caribbean subjects with an immediate positive family history of diabetes does not confer significantly higher levels of biochemical risk factors for the development of type 2 diabetes.
Assuntos
Diabetes Mellitus Tipo 2/genética , Resistência à Insulina , Polimorfismo Genético , Canais de Potássio Corretores do Fluxo de Internalização/genética , Adulto , Antropometria , Glicemia/análise , Região do Caribe , Estudos de Casos e Controles , Distribuição de Qui-Quadrado , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/etnologia , Feminino , Frequência do Gene , Teste de Tolerância a Glucose , Humanos , Insulina/sangue , Lipídeos/sangue , Masculino , Medição de RiscoRESUMO
BACKGROUND AND OBJECTIVE: Studies suggest that the link between postprandial hyperglycaemia and cardiovascular risk in type 2 diabetes mellitus might be related to postprandial hypertriglyceridaemia and the increased levels of the highly atherogenic small and dense low density lipoprotein (LDL) particles. In this study we therefore aimed to determine which of the three popular carbohydrate foods has the highest potential of increasing postprandial triglyceride levels in type 2 diabetic patients and in healthy non diabetic individuals. METHODS: All subjects were studied on three different occasions seven days apart after an overnight fast. On each day of study, anthropometric indices were measured and after collecting fasting blood sample, subjects consumed bread, roti or rice within 10 min and water taken as wished. Subsequently, 7 ml of venous blood samples were collected at 60, 90, 120 and 150 min for insulin, glucose and lipids determinations. RESULTS: The diabetic and non diabetic healthy subjects had similar baseline body mass index, insulin, triglyceride, total and LDL-cholesterol. The mean percentage triglyceride increase after ingestion of the test foods was highest with bread and lowest with rice irrespective of diabetic status or ethnicity, and despite similar baseline triglyceride, insulin and body mass index levels, the diabetic patients of East Indian origin had comparatively higher incremental triglyceride levels for the three test foods than those of African origin. INTERPRETATION AND CONCLUSION: Contrary to anecdotal perception, the commercially prepared whole wheat bread has the highest propensity to induce hypertriglyceridaemia especially among diabetic patients of East Indian origin.
Assuntos
Diabetes Mellitus Tipo 2/sangue , Carboidratos da Dieta/efeitos adversos , Hipertrigliceridemia/etiologia , Período Pós-Prandial , Pão/efeitos adversos , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Oryza/efeitos adversos , Índias OcidentaisRESUMO
It has been reported that mixed meals are used in clinics in developing and developed countries in screening and diagnosis of diabetes. Thus, we aimed to determine the differences in 2-h plasma glucose values after non-diabetic subjects ingested 75 g pure glucose and its equivalent content in frequently consumed carbohydrate foods in Caribbean subjects. Twenty-seven apparently healthy non-diabetic subjects (nine males, 18 females) consumed 75 g pure glucose and its carbohydrate equivalent in three ethnic test foods (bread, rice and roti) at 7 days apart. Plasma glucose and insulin levels were determined in blood samples collected before and after 60, 90, 120 and 150 min of ingestion of these foods. In comparison with each of the test foods, the postprandial 1-h and 2-h plasma glucose values and the 60, 90, 120 and 150 min incremental glucose concentrations after oral glucose load were significantly higher than the corresponding values for each of the test foods (all P<0.01). In spite of these higher postprandial glucose concentrations, the postprandial insulin responses following the oral glucose load and the test foods did not significantly differ at any time point (all P>0.05). However, the test food, roti, tended to stimulate higher absolute and incremental insulin secretions than pure glucose or any other test food (all P>0.05). Generally, the correlation between 2-h plasma glucose value after the ingestion of the pure glucose and each of the test foods was significant (all correlation coefficients were greater than 0.70, P<0.01). In conclusion, different ethnic mixed meals could serve as an alternative to glucose in routine screening and diagnosis of diabetes if its available carbohydrate content is known and quantified.
Assuntos
Glicemia/metabolismo , Diabetes Mellitus Tipo 2/diagnóstico , Adulto , Diabetes Mellitus Tipo 2/sangue , Dieta , Carboidratos da Dieta , Etnicidade , Feminino , Glucose , Teste de Tolerância a Glucose/métodos , Humanos , Insulina/sangue , Masculino , Pessoa de Meia-Idade , Período Pós-Prandial , Trinidad e TobagoRESUMO
BACKGROUND & AIM: Previous studies suggest that inadequate glycaemic control in diabetic patients might be related to the type of carbohydrates the patients consume regularly. Thus, we aimed to assess glucose and insulin responses after diabetic and non-diabetic subjects ingested 3 commonly consumed carbohydrate-based foods. METHODS: Thirty-eight type-2 diabetic and 27 non-diabetic subjects were studied in 3 different occasions of 7 days apart. On each day of the study, anthropometric indices were measured and after collecting fasting blood samples, subjects randomly consumed bread, roti or rice within 10 min. Subsequently 7 ml of venous blood samples were collected at 60, 90, 120 and 150 min for determination of glucose and insulin responses. RESULTS: Although the diabetic patients were older than the healthy subjects (P < 0.05), both subjects had similar weight, body mass index and waist and hip circumferences (P > 0.05). The mean fasting and post meal plasma glucose concentrations for the 3 test foods were higher in diabetic patients than the corresponding values for the healthy subjects (all; P < 0.001). Generally, roti elicited the highest total incremental glucose responses in the diabetic patients irrespective of ethnic group (P < 0.05). CONCLUSION: There were variations in glucose and insulin responses to the 3 test foods. However, roti elicited the highest postprandial hyperglycaemia and should therefore be discouraged in regular dietary plan of diabetic patients.
Assuntos
Glicemia/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Carboidratos da Dieta/administração & dosagem , Carboidratos da Dieta/farmacocinética , Insulina/sangue , Antropometria , Área Sob a Curva , Estudos Cross-Over , Jejum , Feminino , Teste de Tolerância a Glucose , Humanos , Masculino , Pessoa de Meia-Idade , Período Pós-Prandial , Índias OcidentaisRESUMO
Summary - BACKGROUND & AIM: Previous studies suggest that inadequate glycaemic control in diabetic patients might be related to the type of carbohydrates the patients consume regularly. Thus, we aimed to assess glucose and insulin responses after diabetic and non-diabetic subjects ingested 3 commonly consumed carbohydrate-based foods. METHODS: Thirty-eight type-2 diabetic and 27 non-diabetic subjects were studied in 3 different occasions of 7 days apart. On each day of the study, anthropometric indices were measured and after collecting fasting blood samples, subjects randomly consumed bread, roti or rice within 10 min. Subsequently 7 ml of venous blood samples were collected at 60, 90, 120 and 150 min for determination of glucose and insulin responses. RESULTS: Although the diabetic patients were older than the healthy subjects (P < 0.05), both subjects had similar weight, body mass index and waist and hip circumferences (P > 0.05). The mean fasting and post meal plasma glucose concentrations for the 3 test foods were higher in diabetic patients than the corresponding values for the healthy subjects (all; P < 0.001). Generally, roti elicited the highest total incremental glucose responses in the diabetic patients irrespective of ethnic group (P < 0.05). CONCLUSION: There were variations in glucose and insulin responses to the 3 test foods. However, roti elicited the highest postprandial hyperglycaemia and should therefore be discouraged in regular dietary plan of diabetic patients.
Assuntos
Humanos , Índice Glicêmico/fisiologia , Atenção Primária à Saúde/estatística & dados numéricos , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/patologia , Análise de Alimentos/estatística & dados numéricos , Índias Ocidentais/etnologiaRESUMO
Reports from developing countries indicate that a rise in the socioeconomic level is a risk factor for metabolic disorders. We aimed to assess the indices of obesity, dyslipidemia, and insulin resistance among fairly literate healthy adults in a multidisciplinary institution in Trinidad. The study included 156 volunteers (46 males and 110 females, 17-40 years old). The subjects provided information on age, ethnicity, educational attainment, and occupation in self-administered, closed-ended questionnaires. Waist and hip circumferences (cm), weight (kg), and height (m) were measured. Fasting blood samples were taken for glucose, insulin, and lipid determinations in 78 subjects who volunteered for laboratory measurements. Insulin resistance was determined with homeostasis model assessment (HOMA). Of the 156 subjects studied, 83% had received tertiary education, and had no previous record of body mass index (BMI); 8% were obese, 17% were overweight, and 27% were underweight. Laboratory measurements in 78 subjects revealed 28% hypercholesterolemia and 20% hyperinsulinemia. There were no significant gender-related differences in these prevalence rates (P>0.05). The identification of obesity, underweight, hyperinsulinemia, and hypercholesterolemia in this healthy population suggests that screening for the indices of metabolic disorders in a healthy population would be potentially useful for the early identification and treatment of metabolic-related disorders.