T-IR- Study to Understand the Effects of Testosterone and Estrogen on the Body's Response to the Hormone Insulin
T-IR
Androgen-mediated Pathways in the Regulation of Insulin Sensitivity in Men
1 other identifier
interventional
53
1 country
1
Brief Summary
The purpose of this research study is to understand the effects of testosterone and estrogen on the body's response to the hormone insulin.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_1
Started Jun 2013
Longer than P75 for phase_1
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 12, 2012
CompletedFirst Posted
Study publicly available on registry
September 18, 2012
CompletedStudy Start
First participant enrolled
June 1, 2013
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 1, 2015
CompletedResults Posted
Study results publicly available
June 14, 2017
CompletedStudy Completion
Last participant's last visit for all outcomes
December 1, 2017
CompletedMay 8, 2018
April 1, 2018
1.9 years
September 12, 2012
February 16, 2017
April 5, 2018
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Insulin Sensitivity Quantified by Matsuda Index
Whole body insulin sensitivity as quantified by Matsuda Index at the end of the treatment period, calculated by the following equation: 10,000/square root of(FPG\*FI)\*(FPG+PG30\*2+PG60\*2+PG90\*2+PG120)/8\*(FPI+PI30\*2+PI60\*2+PI90\*2+PI)/8). FPG=fasting plasma glucose level; FPI=fasting plasma insulin level; PG30,60,90, and 120=plasma glucose levels sampled at 30,60,90, and 120 minutes after oral glucose load; PI30,60,90, and 120=plasma insulin levels sampled at 30,60,90, and 120 minutes after the oral glucose load
4 weeks
Secondary Outcomes (2)
Changes in Body Composition
4 weeks
Changes in Adipose Tissue Gene Expression
4 weeks
Study Arms (4)
Acyline & placebo gel & placebo pill
EXPERIMENTALAcyline (300mcg/kg) + placebo transdermal gel + placebo pill daily
Acyline & Testosterone 1.25g & placebo pill
EXPERIMENTALAcyline (300mcg/kg) + Testosterone gel (1.25g) daily + placebo pill daily
Acyline & Testosterone 5g & placebo pill
EXPERIMENTALAcyline (300mcg/kg) + Testosterone gel (5g) daily + placebo pill daily
Acyline & Testosterone & Letrozole
EXPERIMENTALAcyline (300mcg/kg) + Testosterone gel (5g) daily + letrozole (5mg) daily
Interventions
300 mcg/mL administered subcutaneously (at Day 0, Week 2)
Transdermal Testosterone Gel (either 1.25g or 5g/d) for 4 weeks
Letrozole oral aromatase inhibitor 5mg daily for 4 weeks
placebo gel manufactured to mimic Testosterone 1.62% gel
Oral placebo aromatase inhibitor to mimic Letrozole 5mg/d
Eligibility Criteria
You may qualify if:
- Prostate-specific antigen (PSA) ≤ 3 ng/mL
- Age 25-55 years
- Ability to understand the study, study procedures and provide informed consent
- Serum total T \> 300 ng/dL
- Normal reproductive history and exam
- International Prostate Symptom Score (IPSS) \< 11
You may not qualify if:
- A history of prostate cancer including suspicious digital rectal exam (DRE) or history of highgrade prostatic intraepithelial neoplasia (PIN) on prostate biopsy
- Invasive therapy for benign prostatic hyperplasia (BPH) in the past
- History of acute urinary retention in the previous 3 months
- Current or recent past use of androgenic or anti-androgenic drugs, steroids or drugs which interfere with steroid metabolism (within the last 3 months)
- Current use of statins or glucocorticoids
- Severe systemic illness (renal, liver, cardiac, lung disease, cancer, diabetes mellitus) or skin disease
- A history of or current breast cancer
- Known, untreated obstructive sleep apnea
- Hematocrit \> 50 or \< 34
- Hypersensitivity to any of the drugs used in the study
- History of a bleeding disorder or anticoagulation
- Participation in any other drug study within past 90 days
- History of drug or alcohol abuse within the last 12 months
- Weight \> 280 lbs. or BMI ≥ 33
- Desire for fertility in the next 6 months or current pregnant partner
- +2 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
University of Washington
Seattle, Washington, 98195, United States
Related Publications (42)
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PMID: 29793828DERIVEDChao J, Rubinow KB, Kratz M, Amory JK, Matsumoto AM, Page ST. Short-Term Estrogen Withdrawal Increases Adiposity in Healthy Men. J Clin Endocrinol Metab. 2016 Oct;101(10):3724-3731. doi: 10.1210/jc.2016-1482. Epub 2016 Aug 2.
PMID: 27482750DERIVED
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Results Point of Contact
- Title
- Dr. Katya Rubinow
- Organization
- University of Washington
Study Officials
- STUDY CHAIR
William J Bremner, MD, PhD
University of Washington
- STUDY DIRECTOR
Stephanie T Page, MD, PhD
University of Washington
- PRINCIPAL INVESTIGATOR
Katya Rubinow, MD
University of Washington
Publication Agreements
- PI is Sponsor Employee
- No
- Restrictive Agreement
- No
Study Design
- Study Type
- interventional
- Phase
- phase 1
- Allocation
- RANDOMIZED
- Masking
- DOUBLE
- Who Masked
- PARTICIPANT, INVESTIGATOR
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Assistant Professor, Division of Metabolism, Endocrinology and Nutrition
Study Record Dates
First Submitted
September 12, 2012
First Posted
September 18, 2012
Study Start
June 1, 2013
Primary Completion
May 1, 2015
Study Completion
December 1, 2017
Last Updated
May 8, 2018
Results First Posted
June 14, 2017
Record last verified: 2018-04