- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02654262
Soft Tissue and Bone Development in Young Girls (STAR)
Obesity and Bone Development in Young Girls
Study Overview
Status
Conditions
Detailed Description
The pediatric obesity epidemic continues unabated. Its cardio-metabolic complications are undisputed, including inflammation, insulin resistance (IR), glucose intolerance and greater prevalence of type 2 diabetes (T2D) in youth. We contend an equally serious consequence of these obesity co-morbidities is their detrimental effects on bone development during adolescence, a critical time for mineral accrual and architectural modeling that underlies bone strength and fracture risk. This proposition has received little attention and the sparse results are mixed, with reports of augmented and impaired mineralization. In contrast, animal data demonstrates reduced mineral accrual and compromised architecture with insulin resistance and chronic inflammation. The conflicting results in youth are likely due to mixed samples and analyses that commingle obese youth with metabolic complications with so called metabolically healthy obese youth and the use of technology (i.e., dual energy x-ray absorptiometry, DXA) to measure bone outcomes that is confounded by the very changes that investigators seek to detect. We posit that the positive mechanical effect of excess adiposity on bone is countered by chronic low-grade inflammation and IR so that obese youth with these metabolic complications suffer impaired bone development whereas obesity in otherwise metabolically healthy youth augments development. A thorough understanding of the effects of adiposity and its co-morbidities on bone development is crucial to the development of efficacious interventions aimed at maximal mineral accrual and bone modeling. Thus, we propose primary aims designed to clarify the effects of obesity, insulin resistance and inflammation on bone around the time of peak height velocity. Adipose tissue (AT) distribution undoubtedly matters, especially abdominal visceral AT and skeletal muscle fat content, both strongly related to insulin resistance. Failure to characterize fat distribution is another important limitation of past studies. Consequently we will assess the effect of visceral AT and skeletal muscle fat along with whole body fatness and propose secondary aims designed to develop safe, cost effective methods that we and others can use for estimating AT distribution, a critical component of risk that has rarely been studied in youth relative to bone development.
Primary Aims:
- Assess the associations of total and regional adiposity (visceral AT and leg muscle fat content), insulin resistance, and inflammation with bone mass, density, structure and strength in normal weight, overweight, and obese pre-menarcheal girls
- Assess the effects of total and regional adiposity, insulin resistance, and inflammation on bone development (i.e., 2 year changes in bone parameters) in normal weight and obese pre-menarcheal girls.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Robert Blew, MS
- Phone Number: 520-626-3067
- Email: rblew@u.arizona.edu
Study Contact Backup
- Name: Vinson Lee, MS
- Phone Number: (520) 626-9534
- Email: vinsonl@email.arizona.edu
Study Locations
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Arizona
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Tucson, Arizona, United States, 85714
- Recruiting
- University of Arizona, Nutritional Sciences Department
-
Contact:
- Robert Blew, MS
- Phone Number: 520-626-3067
- Email: rblew@u.arizona.edu
-
Contact:
- Vinson Lee, MS
- Phone Number: 520-626-9534
- Email: vinsonl@email.arizona.edu
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- healthy, female, aged 9-12 years
Exclusion Criteria:
- diagnosis of diabetes
- taking medications that alter body composition and bone mineral accrual
- physical disability that limits physical activity
- learning disability that would limit completion of questionnaires
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Bone development
Time Frame: 2 years
|
Baseline cross-sectional (N=450) and longitudinal changes over 2 years (N=150) in bone mass, density, structure and strength, measured by peripheral quantitative computed tomography (pQCT) and dual-energy X-ray absorptiometry (DXA), as they relate to body composition by DXA and blood biomarkers of insulin resistance and inflammation.
|
2 years
|
Collaborators and Investigators
Investigators
- Principal Investigator: Scott B Going, PhD, University of Arizona
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- HD74565
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