Effects of Telomerase Reactivation With Danazol in Ovarian Function.
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|ClinicalTrials.gov Identifier: NCT04058678|
Recruitment Status : Not yet recruiting
First Posted : August 15, 2019
Last Update Posted : August 15, 2019
This project explores the implication of the telomere pathway in ovarian premature and regular aging. Telomere length and maintenance underlie several biological processes such cancer, aging, human diseases and the biology of stem cells. The reactivation of telomerase should lead to a rejuvenation of the ovarian tissue and the improvement of fertility.
The correlation of telomeric factors in blood and granulosa cells will be studied with the aim of finding telomeric biomarkers of ovarian aging.
|Condition or disease||Intervention/treatment||Phase|
|Ovarian Reserve||Drug: Danazol/Placebo Other: Without intervention||Not Applicable|
This is a pilot study, randomized, controled, blind, parallelo arm clinical trial with inactive substance and medicine.
A pilot study will be developed with a total of 45 individuals from 30 to 45 years old, who represent the most frequent population of women seeking for ART.
A control group composed of women with normal ovarian reserve (30 to 45 years old) is needed to compare telomeric and fertility parameters with the group of women with compromised ovarian reserve. Women in the control group irrespective of their age, will have a greater number of follicles compared to women belonging to the group with compromised ovarian reserve.
A group of women with diminished ovarian reserve that will take an inactive substance has been incluided to avoid biases and to set the fertility base line for women with compromised ovarian reserve. The use of an inactive substance or placebo will help obtain better quality results. For instance, if Danazol happened to improve the fertility outcome, then, there could be a possibility that the IVF improvement might be due to other components of the pill. Using placebo, this possibility would be eliminated, since the placebo will contain all components of the pill, except Danazol.
The development of a pilot study will help us understand the statisticl behavior or the telomeric factors as well as to determine the appropriate number of individuals that shoyuld be recruited in a clinical trial to have results with statistical significance. In addition, a pilot study will help us learn errors or undesired events that may happen during the clinical trial. For instance, if patients cannot follow the indications of their doctors and why, or what proportion of patients will drop the study and the reasons for it. Furthermore, it will also help us understand if there exist a tendency, an indication or even a clear beneficial effect for patients without harming them.
The number of participants selected for the study is considered adequate for each group, since each group will be measured in an independent manner.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||45 participants|
|Intervention Model:||Parallel Assignment|
|Intervention Model Description:||A control group composed of women with normal ovarian reserve to compare telomeric and fertility parameters with the group with compromised ovarian reserve.|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
During the first visist to the doctor, women will be selected according to the selection criteria. Those who seem to have a low ovarian reserve by ultrasound will be informed of the trial, and if they decide to participate, blood will be taken to analyze AMH values. On the second visit, women with low ovarian reserve will be randomized 1:1 for either inactive substance or Danazo, accordint to a computer-generated randomization list prepared by associated statistic. This way, the assigned group will be blind until the momento of executing the randomization procedure. Moment in which, the assigned group will be revealed.
Those with normal ovarian reserve will not be randomized and will just be included as controls.
To maintain the blinding of the trial, Danazol and placebo will be provided in boxs with blisters (PVC opaque and aluminium sealed).
Only the trial medication delegate(s) at the site will dispense the IMP and will know the treatment allocation.
|Official Title:||Effects of Telomerase Reactivation With Danazol in Ovarian Function.|
|Estimated Study Start Date :||October 2019|
|Estimated Primary Completion Date :||October 2020|
|Estimated Study Completion Date :||October 2020|
Sham Comparator: CONTROL
A control group composed of women with normal ovarian reserve (30 to 45 yerras old) is needed to compare telomeric and fertility parameters with the group of women with compromised ovarian reserve. Note that the term "normal ovarian reserve" referred to older women indicates women that still have follicles in their ovaries -and thus, normal AMH values-, even though the number may be lower tan at a younger age or the quality of oocytes may be lower tan in younger women. In other words, women in the control group irrespective of their age, will have a greater number of follicles compared to women belonging to the group with compromised ovarian reserve.
Other: Without intervention
Women with normal ovarian reserve will not be treated in anyway, thus, randomization will not be necessary.
A group of women with diminished ovarian reserve that will take an inactive substance has been included to avoik biases and to set the fertility base line for women with compromised ovarian reserve.
This group will be randomized 1:1 for either inactive substance or Danazol, according to a computer-generated randomization list prepared. Women will be treated with Danazol/Placebo oral way for 3 months.
- Telomere length in granulosa cells [ Time Frame: The evaluation of the main assessment criterion will be done both after eighth visit (36 hours post induction) for women with low ovarian reserve and fifth visit for woman with normal ovarian reserve ]Measured in arbitrary units of fluorescence (a.u.) from 0 to 255 gray intensity (8bit) or Kb (continuous variable). Below 3 kb are considered critically short telomeres in humans.
- Accumulation of short telomeres [ Time Frame: Through study completion, an average of 1 year ]Measured in arbitrary units of fluorescence (a.u.) from 0 to 255 gray intensity (8bit) or Kb (continuous variable). Below 3 kb are considered critically short telomeres in humans.
- Telomerase activity [ Time Frame: Through study completion, an average of 1 year ]Product of PCR amplification, run in acrylamide gels and quantified as band intensity (continuous variable)
- DNA damage measurement [ Time Frame: Through study completion, an average of 1 year ]If damage is positive, then different foci should be apparent in the nucleus of the cell. The number of foci present in the nuclei of at least 100 cells will be counted. If there is DNA damage at telomeres, then yH2AX or 53BPI foci will colocalize with telomeres (labelled with anti TRF1 antibody). Spots will be counted (continuous variable).
- Other telomeric factors. [ Time Frame: Through study completion, an average of 1 year ]The mRNA expression levels of the telomerase gene and the shelterins, which are involved in telomere lengthening and protection, will be measured by qPCR. (continuous variable).
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04058678
|Contact: Juan Antonio Garcia Velasco||91 180 29 email@example.com|
|Contact: Mónica Toribio Paredes||91 180 29 firstname.lastname@example.org|
|Principal Investigator:||María Elisa Varela||IVIRMA MADRID|