NCT01771042

The Effects of Weight Loss on Neuroadrenergic Function

Neuroadrenergic Dysfunction Along the Diabetes Continuum: Benefits of Weight Loss Within Different Strata of Metabolic Risk

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 120 (estimated)
• Sponsor: Baker Heart Research Institute · Academic / Other
• Sex: All
• Age: 45 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

Elevated subconscious nervous system activity is a characteristic of the obese state and contributes importantly to the risk of heart disease and diabetes. This project will compare sympathetic nervous system activity and function in a group of obese persons with differing levels of sugar tolerance (normal, impaired and type 2 diabetic). Inter-relationships with insulin action, blood pressure, heart and kidney function will be determined before and after a 4-month weight loss and 3-month weight loss maintenance program. It is hypothesized that the transition from normal sugar tolerance to impaired sugar tolerance to type 2 diabetes will be accompanied by escalating sympathetic nervous system dysfunction. Furthermore, that weight loss will favorably improve sympathetic function, with greatest benefits occurring in those subjects who are insulin resistant with high blood insulin concentration.

Detailed description

The twin epidemics of obesity and diabetes represent a major public health problem worldwide. There is a growing body of evidence to suggest that autonomic dysfunction, comprising elevated sympathetic nervous system (SNS) activity and blunted sympathetic neural responsiveness plays a role in both the pathogenesis and target organ complications of obesity and diabetes. The proposed project will undertake a detailed comparative analysis of neuroadrenergic function along the diabetes continuum, its inter-relationship with insulin sensitivity and secretion, and target organ function, and the benefits of active weight loss and weight loss maintenance within different strata of metabolic risk.

Conditions

• Obesity
• Type 2 Diabetes
• Metabolic Syndrome

Interventions

Type	Name	Description
OTHER	Dietary weight loss at 25% energy deficit	Dietary weight loss at 25% energy deficit. Dietary macronutrient content will comprise 25% protein, 30% fat and 45% carbohydrate.

Timeline

• Start date: 2013-04-01
• Primary completion: 2017-04-01
• Completion: 2017-04-01
• First posted: 2013-01-18
• Last updated: 2013-01-18

Locations

1 site across 1 country: Australia