Vascular Effect of Tibolone in the Brachial Artery (TDILA)

April 2, 2015 updated by: Selmo Geber

Vascular Effect of Tibolone Versus Placebo Evaluated by Flow-mediated Dilatation of Brachial Artery

The interruption of the secretion of sex steroids occurring during menopause, causes a change in vascular pattern at various levels. As a result, several agencies have side effects that interfere with women's health. The use of hormone replacement therapy has contributed to the improvement in these effects. In previous studies the investigators showed the effect of sex steroids in premenopausal women in the conjugated equine estrogens, medroxyprogesterone acetate and tibolone in menopausal women, on the central retinal arteries. The aim of this study is to evaluate the effects of Tibolone in Flow-Mediated Dilatation of the brachial artery.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Menopause is a transitional phase of the biological evolution of women where there is loss of reproductive capacity. The phenomena are the most striking manifestations represented by vasomotor hot flushes and sweating, the consequent fall in estradiol production by the ovaries. The main landmark of the menopause is menopause, which is the last period governed by the ovaries, reflecting the depletion of the same follicle.

The main clinical manifestations of the climacteric are vascular, acting through mechanisms of action not fully understood. Several studies were published showing its effect on vasomotor tone and demonstrating the production of vasoactive substances by vascular cells induced by them.

The main objective of HRT (Hormone Replacement Therapy), is to improve the physical and psychological state of women who have climacteric disorders, leading to improved quality of life. The American College of Physicians, after careful review of available evidence, it is recommended that all postmenopausal women should be considered eligible to receive HRT and that the decision to treat or not should be individualized. Besides the knowledge of the pattern of endocrine patients climate, the investigators must subject it to full physical examination (pelvic) and exams before planning to start HRT. Complementary tests must be clinically oriented, respecting the resources available. There is no need to make routine use of doses of gonadotropins and sex steroids, which are reserved for certain diagnostic situations where there is any doubt, for example, premature ovarian failure syndrome.

He is currently a world consensus that the best available treatment for menopause is hormone replacement therapy because exogenously resets once the hormones produced by the ovaries. HRT fulfills several objectives: reverse neurovegetative symptoms, improves trophism genital atrophy and genital-urinary, acts in the prevention and treatment of osteoporosis, leading to lower incidence of colorectal cancer, promotes a later onset, lower incidence, evolution and improvement in symptoms of Alzheimer's disease has a positive influence on the view.

The development of HRT and the results that prove their individual benefits and epidemiological brought new questions about the most appropriate way to use the various schemes available. The treatment regimens are designed to establish a hormonal profile similar to that of premenopausal using: estrogens, progestogens and androgens in different doses and routes of administration.

Estrogens are the most commonly used conjugated estrogens. The subcutaneous implants (17 beta estradiol) The percutaneous estradiol in the form of gels, transdermal devices (patches) and Tibolone.

Hormones can be used alone or combined, cyclic or continuous, always trying to individualize each situation in order to provide patients with a regimen that suits your needs and desires.

Since its description in 1989, the extent of dilatation of the brachial artery flow-mediated (FMD) has been used to assess endothelial function. It is believed that ischemia induced by inflation of the cuff cause a dilation of the vessel, leading to an increase in brachial artery flow. This effect seems to be mediated by NO production by normal endothelial cells.

In patients whose bioactivity of NO is decreased or absent on endothelial function impairment, this dilatory response does not happen. The dilation of the brachial artery is thus higher in patients with normal endothelial function than in patients who have a pathology that leads to endothelial injury, among them, Hypertension, Coronary heart disease, diabetes mellitus, smoking, hyperlipidemia and Pre-Eclampsia.

Patients will be randomly divided into two groups of 30, using code envelope with the medication, without her or responsible for the study to know the component to be used (double-blind study), with groups divided as follows:

  • Group 1 placebo for 30 days;
  • Group 2: Tibolone 2.5 mg / day for 30 days Patients will be evaluated before the use of drugs and the end of their use (28-30 days of medication use).

Study Type

Interventional

Enrollment (Actual)

60

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Minas Gerais
      • Belo Horizonte, Minas Gerais, Brazil, 30130100
        • Hospital das Clínicas - Universidade Federal de Minas Gerais

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

43 years to 63 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women without menstrual cycles within the last 12 months and FSH > 30IU/L
  • Healthy women
  • Women that were not using drugs with potential vascular effect within the last 1 year
  • Women that never used hormone replacement therapy

Exclusion Criteria:

  • Smoking
  • Blood Pressure > 160/90 mm Hg.
  • Breast and or endometrial cancer
  • History of acute myocardial infarction
  • Diabetes
  • Vaginal bleeding of any origin
  • Hepatic disease
  • Thrombophlebitis or thromboembolic disorders

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Tibolone use
climacteric women will use Tibolone for 30 days
Experimental group will use 2.5mg of tibolone for 30 days
Other Names:
  • Livial
Placebo Comparator: Placebo use
climacteric women will use placebo for 30 days
patients of the placebo group will use placebo one a day for 30 days

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Diameter measurement of the brachial artery using flow-mediated dilation of post menopausal women, before and after use of tibolone.
Time Frame: 30 days
We will evaluate the vascular effect of Tibolone on the brachial artery. The diameter of the artery will be measured before and one month after use of Tibolone and, in both situations, before and after the use of a cuff in the forearm. Measurement will be in millimeters.
30 days

Secondary Outcome Measures

Outcome Measure
Time Frame
Patients symptoms before and after the use of Tibolone
Time Frame: 30 days
30 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2012

Primary Completion (Actual)

February 1, 2015

Study Completion (Actual)

February 1, 2015

Study Registration Dates

First Submitted

February 21, 2012

First Submitted That Met QC Criteria

March 2, 2012

First Posted (Estimate)

March 5, 2012

Study Record Updates

Last Update Posted (Estimate)

April 3, 2015

Last Update Submitted That Met QC Criteria

April 2, 2015

Last Verified

April 1, 2015

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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