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BACKGROUND
This study was undertaken in order to identify the relationships between family history of type 2 diabetes and cardiovascular risk factors in non-diabetic Mexican individuals.
METHODS
The design was a cross-sectional, population-based study stratified by age and sex. Participants
Genetically obese Zucker rats, like obese humans, have normal or elevated circulating insulin-like growth factor-I (IGF-I) levels in the presence of low GH secretion. Hyperinsulinemia, increased energy status, or other nutritional factors associated with obesity could be responsible for these
OBJECTIVE
To study the prevalence of alterations of glucoregulation in childhood obesity.
METHODS
250 obese children. Oral glucose tolerance test was performed, serum glucose and insulin were determined, and HOMA-IR was calculated.
RESULTS
Impaired fasting glucose (IFG) was found in 1.2% according
Animal models with genetic or experimentally produced (lesions of hypothalamus) obesities are numerous and unlikely to ever be reduced to a single pathophysiologic entity. However, obese animals have many similar traits in common. They are all hyperinsulinemic, an abnormality that occurs early in
The experimental evidence supporting a direct role for hyperinsulinemia as a cause of insulin resistance remains equivocal. Amylin, an islet beta-cell peptide cosecreted with insulin in response to nutrient stimuli, causes insulin resistance when infused into intact animals or applied to isolated
A close association between obesity and hyperinsulinemia is well recognized, but it is not known whether this relationship is affected by the genetic susceptibility to type 2 diabetes. Insulin response to a 75-g oral glucose load was evaluated in healthy nondiabetic Caucasians with first-degree
OBJECTIVE
To study the relationship between serum leptin and circulating insulin under basal and in response to oral glucose administration in hyperinsulinemic patients with or without obesity.
METHODS
Fifteen female patients of known hyperinsulinemia provided material for the study. Leptin and
OBJECTIVE
In order to circumvent the multiple peripheral effects of hyperleptinemia and leptin resistance, the efficacy of leptin transgene expression in the hypothalamic paraventricular nucleus (PVN) to reinstate the central energy homeostasis in obesity was examined.
METHODS
A recombinant
The metabolic syndrome is a major health problem in western countries, due to the deleterious metabolic consequences of sedentarity and rich diet in the large part of the population who exhibits the so-called "thrifty phenotype". This syndrome, which is at high risk for diabetes and atherothrombosis
The relationship between beta-endorphin(beta-EP)/beta-lipotropin(beta-LP) and insulin secretion in the basal state and after glucose challenge was studied in obese male Zucker rats and their lean littermates. Baseline plasma beta-EP/beta-LP concentrations were similar in the two groups of animals.
OBJECTIVE
During insulin resistance, sympathetic nerve activity is increased. However insulin resistance is a common feature of obesity and essential hypertension, it is unclear if chronic hyperinsulinemia per se contributes to sympathetic overactivation. The purpose of our study was to explore++
An association between hyperinsulinemia and hypertension has been suggested by epidemiological surveys. To assess whether this association is independent of the presence of other hyperinsulinemic states, such as obesity and glucose intolerance, we measured the insulin response to oral glucose in a
Obesity is generally associated with hyperinsulinemia. However, whether obesity precedes or follows hyperinsulinemia is not clear. The present study examined the temporal nature of the association between obesity and hyperinsulinemia in a biracial (black-white) community-based population enrolled in
BACKGROUND
Obesity is a multifactorial disease that arises from complex interactions between genetic predisposition and environmental factors. Leptin is central to the regulation of energy metabolism and control of body weight in mammals.
RESULTS
To better recapitulate the complexity of human
The negative-feedback control exerted by plasma insulin on beta-cell insulin release in normal-weight and obese subjects is still a matter of debate. Subjects submitted to a euglycemic insulin clamp undergo a suppression of insulin secretion that is due to both the infused insulin and the 2- to