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Trial registered on ANZCTR
Registration number
ACTRN12611001198910
Ethics application status
Approved
Date submitted
17/11/2011
Date registered
22/11/2011
Date last updated
22/11/2011
Type of registration
Prospectively registered
Titles & IDs
Public title
Physiology of brown fat in humans
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Scientific title
Impact of beta-adrenergic agents, sex steroids, growth hormone and corticosteroids on brown fat activity in adult humans
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Secondary ID [1]
273406
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None
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Obesity
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Condition category
Condition code
Metabolic and Endocrine
279388
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0
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Diabetes
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Arm 1: oral bisoprolol 2.5 mg daily for 7 days
Arm 2: oral formoterol 80 ug daily for 7 days
Arm 3: transdermal testosterone 50mg daily for 7 days
Arm 4: oral oestradiol 50ug daily for 1 cycle
Arm 5: subcutaneous growth hormone 0.5 mg daily for 7 days
Arm 6: oral prednisone 10 mg daily for 7 days
Subjects will be recruited into only one arm and the selection is based on the specific inclusion criteria for each arm and will be at the discretion of the investigator.
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Intervention code [1]
283741
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Treatment: Drugs
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Comparator / control treatment
Each participant will be his/her own control. In other words, the energy and brown fat status of each participant will be compared before and after each treatment. There is no control group and each arm will be of equal weight.
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Control group
Active
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Outcomes
Primary outcome [1]
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Changes in brown fat activity and volume as measured by positron emission tomography
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Assessment method [1]
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Timepoint [1]
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baseline and 7 days after treatment
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Secondary outcome [1]
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Changes in energy expenditure and diet-induced thermogenesis
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Assessment method [1]
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Timepoint [1]
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baseline and 7 days after treatment
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Eligibility
Key inclusion criteria
Arms 1, 2 and 6: healthy adults 18+ years old
Arm 3: men with hypogonadism
Arm 4: postmenopausal women
Arm 5: growth hormone deficient adults
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
pregnancy
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Subjects are screened for inclusion and exclusion criteria. Each subject acts as his/her own control
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
non-randomised
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Parallel
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Other design features
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Phase
Phase 2
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Type of endpoint/s
Safety/efficacy
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Statistical methods / analysis
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
1/02/2012
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
70
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Funding & Sponsors
Funding source category [1]
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Government body
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Name [1]
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NHMRC
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Address [1]
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Level 1
16 Marcus Clarke Street
Canberra ACT 2601
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Country [1]
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Australia
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Primary sponsor type
Government body
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Name
NHMRC
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Address
Level 1
16 Marcus Clarke Street
Canberra ACT 2601
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Country
Australia
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Secondary sponsor category [1]
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University
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Name [1]
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University of Queensland
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Address [1]
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Ipswich Road
Woolloongabba
QLD 4102
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Country [1]
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Australia
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Other collaborator category [1]
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Hospital
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Name [1]
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Princess Alexandra Hospital, Brisbane
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Address [1]
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Ipswich Road
Woolloongabba
QLD 4102
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Country [1]
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Australia
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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The Metro South Health Service District Human Research Ethics Committee
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Ethics committee address [1]
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Centres for Health Research Level 2, Building 35 Princess Alexandra Hospital Ispwich Road WOOLLOONGABBA QLD 4102
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Ethics committee country [1]
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Australia
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Date submitted for ethics approval [1]
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10/10/2011
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Approval date [1]
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18/11/2011
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Ethics approval number [1]
286186
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HREC/11/QPAH/569
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Summary
Brief summary
The proposed study investigates the physiology of brown fat in adult humans. Brown fat plays a major role in metabolism, protecting animals from obesity. In humans, brown fat is thought to disappear after infancy. However, metabolic imaging by positron emission tomography (PET)-CT using fluorodeoxyglucose (FDG), a glucose analogue, has revealed fat of high metabolic activity in the neck region in adults, confirmed to be brown fat on histology. Our previous molecular and histological analysis suggests brown fat to be present in the majority of adult humans. However, factors regulating brown fat activity/abundance are unknown. By PET, brown fat prevalence was higher in women, associated with lower age, weight and glucose level, suggesting regulation by hormones and a role in energy homeostasis. The hypothesis of the current study is that brown fat is regulated hormonally and contributes significantly to metabolism. We aim to determine physiologic factors which regulate brown fat activity and its metabolic significance in adulthood. The proposal involves regulatory studies in-vivo (FDG uptake) to explore effects of adrenergic, sex and metabolic hormones on brown fat activity. Metabolic significance will be determined by relating FDG uptake to diet-induced thermogenesis.
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Trial website
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Trial related presentations / publications
Lee P, Swarbrick MM, Zhao JT, Ho KK. Inducible brown adipogenesis in supraclavicular fat in adult humans. Endocrinology. 2011 Oct;152(10):3597-602. Epub 2011 Jul 26. Lee P, Zhao JT, Swarbrick MM, Bova R, Gracie G, Freund J, Greenfield JR, Ho KK. High prevalence of brown adipose tissue in adult humans. J Clin Endocrinol Metab. 2011 Aug;96(8):2450-5. Epub 2011 May 25. Lee P, Greenfield JR, Ho KK. Hot Fat in a cool man: infrared thermography and brown adipose tissue. Diabetes Obes Metab. 2011; 13: 92-3. Lee P, Greenfield JR, Ho KK, Fulham MJ. A critical appraisal of the prevalence and metabolic significance of brown adipose tissue in adult humans. Am J Physiol Endocrinol Metab. 2010; 299: E601-6. Lee P, Ho KKY, Fulham MJ. The importance of brown adipose tissue. N Engl J Med. 2009 23; 361:418.
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Public notes
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Contacts
Principal investigator
Name
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Address
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Dr Paul Lee
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Address
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School of Medicine
University of Queensland
Building 33
Princess Alexandra Hospital
Ipswich Road, Woolloongabba, Brisbane
QLD 4102
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Country
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Australia
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Phone
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61-7-3176-7097
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Fax
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61-7-3176-2973
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Paul Lee
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Address
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School of Medicine
University of Queensland
Building 33
Princess Alexandra Hospital
Ipswich Road, Woolloongabba, Brisbane
QLD 4102
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Country
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Australia
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Phone
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61-7-3176-7097
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Fax
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61-7-3176-2973
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Email
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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