Expandability of Aging Adipose Tissue

NCT ID: NCT02456870

Last Updated: 2019-06-13

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-06-30

Study Completion Date

2018-12-31

Brief Summary

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The purpose of this pilot study is to determine whether adipose tissue loses some of its ability to expand in response to overfeeding in older compared to younger men. The investigators hypothesize that the adipose tissue response to overfeeding may be weakened in older when compared to younger men, thereby leading to worsened ectopic storage depots for older men.

Detailed Description

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This pilot study will begin to address whether adipose tissue biology changes with advancing age. Specifically, we will test whether adipose tissue loses some of its ability to expand in response to overfeeding in older compared to younger men. To test this possibility the Investigators will recruit overweight and mildly obese older (age 55-75y) and younger (age 25-40y) men and collect adipose tissue biopsies before and after 7 days of overfeeding. The investigators will test how well the cells in adipose tissue expand in response to overfeeding and whether this differs between younger and older men.

Conditions

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Aging Obesity

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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MA

Middle-aged overweight and obese men (age 25-40yr)

Group Type OTHER

Overfeeding

Intervention Type OTHER

Consumption of 40% excess calories for 7 consecutive days

OA

Older overweight and obese men (age 55-75yr)

Group Type OTHER

Overfeeding

Intervention Type OTHER

Consumption of 40% excess calories for 7 consecutive days

Interventions

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Overfeeding

Consumption of 40% excess calories for 7 consecutive days

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Men
* Aged 25-40y OR 55-75y
* BMI 28-35 kg/m2
* Weight stable (±2kg over past 3 mo)
* Sedentary to moderately active (\<3 d/wk of exercise lasting \>20min)
* Non-smokers (never used or quit \>7yrs prior)

Exclusion Criteria

* Women
* Currently using hormones, glucose or lipid lowering medication
* Engaged in exercise or diet program
* Currently gaining or losing weight or using weight loss drugs
* Diabetes mellitus (diagnosis, treatment, FBG ≥126 mg/dL)
* Uncontrolled metabolic disorders (e.g., thyroid)
Minimum Eligible Age

25 Years

Maximum Eligible Age

75 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes

Sponsors

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Colorado State University

OTHER

Sponsor Role collaborator

University of Colorado, Denver

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Rachael E Van Pelt, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Colorado, Denver

Locations

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Univeristy of Colorado, Anschutz Medical Campus

Aurora, Colorado, United States

Site Status

Countries

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United States

References

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Kim JY, van de Wall E, Laplante M, Azzara A, Trujillo ME, Hofmann SM, Schraw T, Durand JL, Li H, Li G, Jelicks LA, Mehler MF, Hui DY, Deshaies Y, Shulman GI, Schwartz GJ, Scherer PE. Obesity-associated improvements in metabolic profile through expansion of adipose tissue. J Clin Invest. 2007 Sep;117(9):2621-37. doi: 10.1172/JCI31021.

Reference Type BACKGROUND
PMID: 17717599 (View on PubMed)

Caso G, McNurlan MA, Mileva I, Zemlyak A, Mynarcik DC, Gelato MC. Peripheral fat loss and decline in adipogenesis in older humans. Metabolism. 2013 Mar;62(3):337-40. doi: 10.1016/j.metabol.2012.08.007. Epub 2012 Sep 19.

Reference Type BACKGROUND
PMID: 22999012 (View on PubMed)

Tchoukalova YD, Votruba SB, Tchkonia T, Giorgadze N, Kirkland JL, Jensen MD. Regional differences in cellular mechanisms of adipose tissue gain with overfeeding. Proc Natl Acad Sci U S A. 2010 Oct 19;107(42):18226-31. doi: 10.1073/pnas.1005259107. Epub 2010 Oct 4.

Reference Type BACKGROUND
PMID: 20921416 (View on PubMed)

Other Identifiers

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14-2411

Identifier Type: -

Identifier Source: org_study_id

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