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CompletedNCT02097680HEPAROBUpdated Jan 24, 2022

Influence of Aromatase Inhibition on Hepatic- and Cardiac Function in Severe Obese Men

A Phase 4 interventional study of Letrozole and Placebo in Obesity, sponsored by University Hospital, Ghent. Completed at 1 site in Belgium. Open to male participants aged 20 Years to 60 Years. Per ClinicalTrials.gov, last updated 2022-01-24.

Sponsored by University Hospital, Ghent · Phase 4, Interventional, and Health services research

Phase
Phase 4
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
20 Years to 60 Years
Sex
Male
01

Study summary

It seems plausible that increased aromatase activity in obese men, as a result of a larger fat mass, is responsible for decreased levels of testosterone. Therefore aromatase inhibition increases testosterone levels, which may affect hepatic and cardiac function.

In this intervention study two groups of hypogonadal obese men are compared. Group A is treated with Letrozole 2.5 mg (aromatase inhibitor) once every two days during four months; a group with normal testosterone and low oestrogen concentrations. Group B is treated with placebo once every two days during four months; this group will retain low testosterone - and high oestrogenic concentrations.

The primary objective of the study is to evaluate effects of changed sex steroids in obese men on hepatic and cardiac function.

02

Conditions studied

  • Obesity

Keywords

  • with disturbed glucose metabolism
  • without disturbed glucose metabolism
03

In context

Lead sponsor

University Hospital, Ghent is the lead sponsor of 665 studies on the registry; 156 are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 4 (80%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 60 Years
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  • Obese male subjects
  • Planned for gastric bypass (BMI > 30 kg/m²)
  • low testosterone levels
  • age between 20 and 65

Exclusion criteria

Exclusion Criteria:

  • Primary hypogonadism or secondary hypogonadism due to genetic causes (Kallman syndrome etc.), tumours, infiltrative diseases, infections, pituitary apoplexy, trauma, critical illness, chronic systemic illness or intentional.
  • Treatment with corticoids, opiates (on a daily basis), androgen- or estrogen analogs or CYP2A6 substrates (Dexmedetomidine, Ifosfamide, Methoxsalen, Miconazole, Tranylcypromine).
  • Impaired renal function defined as serum-creatine > 1.5 mg/dL
  • Clinically significant active cardiovascular disease including history of myocardial infarction within the past 6 months and/or heart failure (NYHA class III or IV) at the discretion of the investigator
  • Cancer or any clinically significant disease or disorder, which in the investigator's opinion could interfere with the results of the trial
  • Palpable prostate nodule or induration, Prostate-specific antigen (PSA) > 3 ng/mL, prostatism, untreated sleep apnea syndrome, erythrocytosis (hematocrit > 50%) or hyperviscosity. (cfr. Endocrine Society Clinical Practice Guideline by Bhasin S et al.)
  • Known or suspected abuse of alcohol or narcotics
05

Study design

Phase
Phase 4
Primary purpose
Health services research
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
30 participants (estimated)

Study arms

  • Experimental
    Letrozole

    Drug: Letrozole

  • Placebo comparator
    Placebo comparator

    Drug: Placebo

Interventions

  • DrugLetrozole

    One Letrozole 2.5 mg capsule every two days during four months

    Also known as: Femara

  • DrugPlacebo

    One placebo capsule every two days during four months

06

What researchers measure

Primary outcomes

  1. cardiac function parameters

    heart function will be measured by echocardiography.

    Time frame: after 4 months intervention

  2. Hepatic function parameters

    Baseline sex steroids will be measured by Liquid chromatography-mass spectrometry (LC-MS/MS) in fasting blood samples, before 10:00 am. Liver function will be analysed by a Nuclear Magnetic Resonance (NMR) recording

    Time frame: before intervention

  3. Hepatic function parameters

    Baseline sex steroids will be measured by Liquid chromatography-mass spectrometry (LC-MS/MS) in fasting blood samples, before 10:00 am. Liver function will be analysed by a Nuclear Magnetic Resonance (NMR) recording

    Time frame: after 4 months intervention

  4. cardiac function parameters

    heart function will be measured by echocardiography.

    Time frame: before intervention

Secondary outcomes

  1. glucose metabolism

    Glucose metabolism will be estimated by an oral glucose tolerance test (OGTT).

    Time frame: Before four months intervention.

  2. weight

    Time frame: Before intervention.

  3. weight

    Time frame: after four months intervention.

  4. glucose metabolism

    Glucose metabolism will be estimated by an oral glucose tolerance test (OGTT).

    Time frame: Before intervention.

07

Study locations

1 site
  • Ghent University Hospital
    Ghent, 9000, Belgium
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 24, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02097680
Lead sponsor
University Hospital, Ghent
Responsible party
Sponsor
First posted
Mar 27, 2014
Start date
Dec 2013
Primary completion
Jun 2015
Completion
Jun 2015
Last update
Jan 24, 2022

Study contacts

Johannes Ruige, MD, PhD
principal investigator · University Hospital, Ghent

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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