Momentary Predictors of Insulin Restriction Among Adults With Type 1 Diabetes and Eating Disorder Symptomatology.

Objective: Individuals with type 1 diabetes who restrict insulin to control weight are at high risk for diabetes-related complications and premature death. However, little is known about this behavior or how to effectively intervene. The aim of the current study was to identify predictors of insulin restriction in the natural environment that might inform new treatment directions.

Disinhibited eating and weight-related insulin mismanagement among individuals with type 1 diabetes.

Objective: Withholding insulin for weight control is a dangerous practice among individuals with type 1 diabetes; yet little is known about the factors associated with this behavior. Studies of nondiabetic individuals with weight concerns suggest that eating in a disinhibited manner (e.g.

Associations between central nervous system serotonin, fasting glucose, and hostility in African American females.

Background: Previous research has shown an association between hostility and fasting glucose in African American women. Central nervous system serotonin activity is implicated both in metabolic processes and in hostility related traits.

Purpose: The purpose of this study is to determine whether central nervous system serotonin influences the association between hostility and fasting glucose in African American women.

Pilot Study of Caffeine Abstinence for Control of Chronic Glucose in Type 2 Diabetes.

BACKGROUND: A growing body of evidence suggests that caffeinated beverages may impair chronic glucose control in type 2 diabetes. This pilot study tested the chronic effects of caffeine abstinence on glucose control in type 2 diabetic patients who were daily coffee drinkers. METHODS: Twelve coffee drinkers (six males) with established type 2 diabetes participated.

Systolic blood pressure and adiposity: examination by race and gender in a nationally representative sample of young adults.

Background: Adiposity, or more specifically, underlying body fat distribution, has been associated with systolic blood pressure (SBP), and it has been suggested that these associations vary between whites and blacks, as well as by gender.

Methods: Here, we use data from the National Longitudinal Study of Adolescent Health (Add Health), a US study of over 15,000 participants (median age 29.0 years), to characterize the associations between measures of body fat distribution-waist circumference (WC) and WC adjusted for body mass index (BMI) (WC(-bmi))-with SBP within white and black race and gender subgroups.

Central nervous system serotonin and clustering of hostility, psychosocial, metabolic, and cardiovascular endophenotypes in men.

Objective: To use measures of cerebrospinal fluid (CSF) 5-hydroxyindoleacetic acid (5HIAA) and genotype of a functional polymorphism of the monoamine oxidase A gene promoter (MAOA-uVNTR) to study the role of central nervous system (CNS) serotonin in clustering of hostility, other psychosocial, metabolic and cardiovascular endophenotypes.

Methods: In 86 healthy male volunteers, we evaluated CSF levels of the primary serotonin metabolite 5HIAA and MAOA-uVNTR genotype for association with a panel of 29 variables assessing hostility, other psychosocial, metabolic, and cardiovascular endophenotypes.

Results: The correlations of 5HIAA with these endophenotypes in men with more active MAOA-uVNTR alleles were significantly different from those of men with less active alleles for 15 of the 29 endophenotypes.

Plasma epinephrine predicts fasting glucose in centrally obese African-American women.

The high prevalence of diabetes in African-American (AA) women has been widely assumed to be related to the greater prevalence of obesity in this group. Catecholamine release acting on central adipose tissue has been proposed to be a contributing factor. The aim of this article was to examine the interaction of plasma catecholamines and central adiposity on fasting and nonfasting glucose levels in two separate samples.

Hostility and minimal model of glucose kinetics in African American women.

Objective: To explore the underlying physiology of hostility (HOST) and to test the hypothesis that HOST has a greater impact on fasting glucose in African American (AA) women than it does on AA men or white men or women, using an intravenous glucose tolerance test (IVGTT) and the minimal model of glucose kinetics.

Methods: A total of 115 healthy subjects selected for high or low scores on the 27 item Cook Medley HOST Scale underwent an IVGTT. Fasting nonesterified fatty acids (NEFA) levels were measured before the IVGTT.

Hostility and fasting glucose in African American women.

Objective: To examine whether the relationship of hostility (HOST) to fasting glucose indices is moderated by sex and race. HOST has been associated with abnormalities in glucose metabolism. Prior studies suggested that this association may be more prevalent in women and in African American (AA) individuals.

A convenient LC-MS method for assessment of glucose kinetics in vivo with D-[13C6]glucose as a tracer.

Background: The isotope-labeled intravenous glucose tolerance test (IVGTT) combined with computer modeling is widely used to derive parameters related to glucose metabolism in vivo. Most of these methods involve use of either (2)H(2)-labeled or (13)C(1)-labeled D-glucose as a tracer with GC-MS to measure the isotope enrichment. These methods are challenging, both technologically and economically.

HPA axis function in male caregivers: effect of the monoamine oxidase-A gene promoter (MAOA-uVNTR).

Caregiving stress is associated with negative health outcomes. Neuroendocrine functioning may be a mediator of such outcomes. The MAOA gene regulates activity of neurotransmitters involved with neuroendocrine responses to stress.

Childhood socioeconomic status and serotonin transporter gene polymorphism enhance cardiovascular reactivity to mental stress.

Objective: To test the hypothesis that low socioeconomic status (SES) and the 5HTTLPR L allele are associated with increased cardiovascular reactivity (CVR) to stress in a larger sample and that SES and 5HTTLPR genotypes interact to enhance CVR to stress. CVR to mental stress has been proposed as one mechanism linking stress to the pathogenesis of cardiovascular disease. The more transcriptionally efficient long (L) allele of a polymorphism of the serotonin transporter gene promoter (5HTTLPR) has been found associated with increased risk of myocardial infarction.

Depressive symptoms, race, and glucose concentrations: the role of cortisol as mediator.

Objective: This study examined the associations of depressive symptoms with glucose concentrations and morning cortisol levels in 665 African-American and 4,216 Caucasian Vietnam-era veterans.

Research Design And Methods: Glucose level was measured as a three-level variable (diabetes, impaired glucose, and normal). Depressive symptoms were measured by the Obvious Depression Scale (OBD) from the Minnesota Multiphasic Personality Inventory.

Direct-to-patient expert system and home INR monitoring improves control of oral anticoagulation.

Background And Objective: Internet-based disease management programs have the potential to improve patient care. The objective of this study was to determine whether an interactive, internet-based system enabling supervised, patient self-management of oral anticoagulant therapy provided management comparable to an established anticoagulation clinic.

Patients/methods: Sixty patients receiving chronic oral anticoagulant therapy who had access to the internet and a printer, were enrolled into this prospective, single-group, before-after study from a single clinic and managed between March 2002 and January 2003.

Exaggeration of postprandial hyperglycemia in patients with type 2 diabetes by administration of caffeine in coffee.

Objective: To test whether caffeine administered in coffee increases postprandial hyperglycemia in patients with type 2 diabetes who are habitual coffee drinkers.

Methods: The study used a within-subject, double-blind, placebo-controlled experimental design. Twenty adult coffee drinkers (11 women and 9 men) with type 2 diabetes treated with diet, exercise, orally administered antidiabetic agents, or some combination of these factors completed two mixed-meal tolerance tests (MMTT) after an overnight fast.

Associations of a regulatory polymorphism of monoamine oxidase-A gene promoter (MAOA-uVNTR) with symptoms of depression and sleep quality.

Objective: To examine the relationships among the variable number of tandem repeats in the monoamine oxidase-A linked polymorphic region allelic variation (MAOA-uVNTR) and the symptoms of depression and sleep quality. The monoamine oxidase-A (MAOA) gene, which plays a vital role in degradation of neurotransmitters such as serotonin, norepinephrine, and dopamine, contains a polymorphism in its promoter region (MAOA-uVNTR) that affects transcriptional efficiency. MAOA-uVNTR genotype has been associated with both psychological and physical measures.

Changes in depressive symptoms and glycemic control in diabetes mellitus.

Objective: To investigate if changes in depressive symptoms would be associated with changes in glycemic control over a 12-month period in patients with Type 1 and Type 2 diabetes.

Methods: Ninety (Type 1 diabetes, n = 28; Type 2 diabetes, n = 62) patients having Beck Depression Inventory (BDI) levels of >10 were enrolled in the study. Of those 90 patients, 65 patients completed a 12-week cognitive behavioral therapy intervention.

Neighborhood characteristics moderate effects of caregiving on glucose functioning.

Objective: Adverse neighborhood environments and caregiving for a relative with dementia are both stressors that have been associated with poor health. The present study examined the extent to which three self-report measures of neighborhood characteristics interact with caregiving status (caregiver versus noncaregiver) to modify an important stress related health outcome: plasma glucose.

Methods: The study sample consisted of 147 community recruited caregivers and 147 participants who did not have caregiving responsibilities.

Treatment regimen determines the relationship between depression and glycemic control.

Unlabelled: Several recent studies have suggested that depression is related to poorer glycemic control in patients with type 1 diabetes, but not in type 2 diabetes. We hypothesize that complexity of self-care regimen rather than the type of diabetes, is more important in determining this relationship of depression to glycemic control.

Methods: One thousand thirty-four adults with diabetes were recruited for the study.