Uterine Artery Doppler Changes After Vaginal Administration of Isosorbide Mononitrate In Patients With URPL

April 18, 2022 updated by: Mostafa Tolba Ahmed, Al-Azhar University

Uterine Artery Doppler Changes After Vaginal Administration of Isosorbide Mononitrate In Patients With Unexplained Recurrent Pregnancy Loss

compare uterine artery blood flow before and after the administration of Isosorbide mononitrate as a nitric oxide donor during mid secretory phase of menstrual cycle for patients with unexplained recurrent pregnancy loss.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Recurrent pregnancy loss (RPL) is an important reproductive health issue, because it affects 2%-5% of couples. The incidence of RPL varies widely because of the differences in the definitions and criteria used, as well as the populations characteristics (El Hachem et al., 2017).

The reported incidence of early pregnancy loss depends on the method used to detect pregnancy. An estimated 50% of all conceptions are lost at preclinical stages owing to biochemical loss or implantation failure, further 9-20% of clinically recognized pregnancies are miscarried, mainly during the first trimester (weeks 5-12 of gestation), studies consistently demonstrate a sharp reduction after 12 weeks of gestation to an incidence of ~1% suggesting that most pregnancy losses occur soon after implantation (Dimitriadis et al., 2020).

The Royal College of Obstetricians and Gynecologists defines RPL as three or more consecutive pregnancy losses, The most recent RPL guideline from European Society of Human Reproduction and Embryology states that RPL could be considered after the loss of two or more pregnancies and stresses the importance of the need for further scientific research, including epidemiological studies on the effect of various RPL definitions on diagnosis, prognosis and treatment (ESHRE 2017).

Common established causes include uterine anomalies, antiphospholipid syndrome, hormonal and metabolic disorders, and cytogenetic abnormalities. Other etiologies have been proposed but are still considered controversial, such as chronic endometritis, inherited thrombophilia, luteal phase deficiency, and high sperm DNA fragmentation levels (Yang et al., 2019).

Over the years, evidence-based treatments such as surgical correction of uterine anomalies or aspirin and heparin for antiphospholipid syndrome have improved the outcomes for couples with recurrent pregnancy loss. However, almost half of the cases remain unexplained and are empirically treated using progesterone supplementation, anticoagulation, and/or immunomodulatory treatments. Regardless of the cause, the long-term prognosis of couples with recurrent pregnancy loss is good, and most eventually achieve a healthy live birth. However, multiple pregnancy losses can have a significant psychological toll on affected couples, and many efforts are being made to improve treatments and decrease the time needed to achieve a successful pregnancy (El Hachem et al., 2017).

Appropriate endometrial receptivity is vital in achieving a normal pregnancy, Inadequate uterine perfusion leading to endometrial and subendometrial hypoxia could induce low endometrial receptivity, which would increase spontaneous abortion (taylor et al; 2019 & Mansour et al;2020).

Other studies also suggest that uterine perfusion may regulate endometrial receptivity, and that impaired uterine perfusion is one of the causes of URPL. In recent years, Doppler ultrasound with assessments of parameters of uterine artery and endometrium have become widely accepted when evaluating endometrial receptivity(Yang et al., 2019).

Nitric oxide (NO) is a gas and a free radical which is now recognized to have very important physiological roles. NO is important in the endothelium-dependent regulation of blood flow and pressure as well as inhibiting the activation of blood platelets. By this process , NO activates a haem-containing enzyme called soluble guanylyl cyclase which is activated a thousand fold to produce the signaling molecule cyclic GMP. This has many effects at the molecular level to set in train the pathways which propagate the diverse physiological actions of NO(Zhao et al., 2015).

NO plays important functional roles within vascular system, it induce vasodilation ,inhibit platelet aggregation and adhesion to endothelial cells, also inhibit smooth muscle proliferation ,regulates apoptosis and maintain endothelial barrier integrity. NO is the main vasodilator agent in the placenta ,which is the interface between mother and fetus ,and this is the reason why this molecule is crucial in different physiological aspect of pregnancy ,it is involved in implantation ,platelet adhesion ,early embryonic development .Related to placental perfusion, NO seem to influence cytotrophoblastic invasion during first stage of pregnancy and to mediate the remodeling of spiral arteries ,facilitating adequate blood supply to the growing fetus (Zullino et al., 2018).

Study Type

Interventional

Enrollment (Anticipated)

60

Phase

  • Early Phase 1

Contacts and Locations

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

Study Contact

Study Contact Backup

  • Name: osama Abdelazem Hasan, Lecturer

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

20 years to 35 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women age: 20-35 years.

History of recurrent abortion (two or more successive spontaneous abortions) with :

  • Normal HSG or hysteroscopy
  • Normal serum PRL,
  • Normal thyroid function,
  • Normal HbA1c,
  • Normal pelvic ultrasound
  • Negative tests for antiphospholipid antibody syndrome (ACL, Lupus anticoagulant and anti B2 glycoprotein 1) Non pregnant state. Regular menstrual cycles for the previous three months before the study. No hormonal contraception or intrauterine devices. Not on any vasodilator drugs.

Exclusion Criteria:

Age less or more than 20-35. Nulligravidae or nullipara. Infertile women. Induced abortion. Systemic diseases that might affect the hemodynamic indices as thrombocytopenia and thyrotoxicosis.

Cases with uterine anomalies, uterine myomas, polypi and adnexal masses. History of oophorectomy. History of consanguinity. Family history of chromosomal abnormality as Down syndrome and Turner syndrome.

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: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Uterine artery Doppler Changes After IMN In Patients with URPL
compare uterine artery blood flow before and after the administration of Isosorbide mononitrate as a nitric oxide donor during mid secretory phase of menstrual cycle for patients with unexplained recurrent pregnancy loss.
Drug: isosorbide mononitrate
insert vaginal tablet of isosorbide mononitrate in cases of unexplained recurrent pregnancy loss
Drug: Placebo
insert vaginal tablet of placebo in cases of unexplained recurrent pregnancy loss
Placebo Comparator: Uterine artery Doppler Changes After placebo In Patients with URPL
compare uterine artery blood flow before and after the administration of placebo during mid secretory phase of menstrual cycle for patients with unexplained recurrent pregnancy loss.
Drug: isosorbide mononitrate
insert vaginal tablet of isosorbide mononitrate in cases of unexplained recurrent pregnancy loss
Drug: Placebo
insert vaginal tablet of placebo in cases of unexplained recurrent pregnancy loss

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Uterine Artery Doppler Changes After Vaginal Administration of Isosorbide Mononitrate In Patients with Unexplained Recurrent Pregnancy Loss
Time Frame: baseline
compare uterine artery blood flow before and after the administration of Isosorbide mononitrate as a nitric oxide donor during mid secretory phase of menstrual cycle for patients with unexplained recurrent pregnancy loss.
baseline

Collaborators and Investigators

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

Sponsor

Al-Azhar University

Investigators

  • Study Director: Ahmed Ali nasr, Professor, Al-Azhar University

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.

General Publications

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 (Anticipated)

May 1, 2022

Primary Completion (Anticipated)

August 1, 2022

Study Completion (Anticipated)

September 1, 2022

Study Registration Dates

First Submitted

April 18, 2022

First Submitted That Met QC Criteria

April 18, 2022

First Posted (Actual)

April 22, 2022

Study Record Updates

Last Update Posted (Actual)

April 22, 2022

Last Update Submitted That Met QC Criteria

April 18, 2022

Last Verified

April 1, 2022

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • isosorbide mononitrate in URPL

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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