Optimized PGT-M Strategy for Patients with No Proband

December 5, 2024 updated by: ShangHai Ji Ai Genetics & IVF Institute

Optimized PGT-M Strategy Using Gametes or Arrested Embryos from Patients with No Proband

The clinical practice of PGT-M for monogenetic disease usually adopted a double-checking strategy, which detect the mutation by Sanger sequencing and meantime construct haplotypes using the DNA sample of the proband so as to avoid the risks of misdiagnosis due to recombination and allele drop out (ADO). When there is no affected parent or offspring to serve as the proband, embryo carriers identified through direct mutation detection can be preferentially taken as probands for subsequent linkage analysis. In cases where none of the embryos are detected as mutant carrier, single sperm or the second polar body (PB2) can be complementally collected in the work-up of haplotype establishment. Our study aims to develop an optimized strategy of haplotype construction using gametes or arrested embryos for PGT-M in pedigrees with single gene diseases and no proband in the setting of difficult cases, which takes into account the expected number of oocytes acquired and the gonadal mosaicism.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Enrolling by invitation

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
5

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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

  • China
    • Shanghai
      • Shanghai, Shanghai, China, 200011
        • Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan University

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • The couples intended for PGT-M without proband were recruited from Shanghai JiAi Genetics and IVF Institute, Obstetrics and Gynecology Hospital of Fudan University between January 2023 and December 2024, and were included in the study if they were expected to have difficulties in the identification of an EAP, typically meeting one of the following criteria:

    1. the carrier of the pathogenic variant was without typical clinical symptoms or detected as gonadosomal mosaic;
    2. the asymptomatic parents, who had one or more children affected with the same disorder, did not possess the genomic alterations carried by the children as per Sanger sequencing or targeted deep sequencing;
    3. female partner with diminished ovarian reserve and therefore a low yield of embryos;
    4. the variants are X-linked and the karyotype of the variant carrier is 47, XXX or 47, XXY etc.

Exclusion Criteria:

  • (1) Non-PGT-M families; (2) Pedigree of other proband samples can be obtained; (3) Patients seeking for PGT-M who strongly request no haplotype analysis in embryos and only require Sanger testing after being fully informed of the risk.

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: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: PGT-M
The couples intended for PGT-M without proband were recruited from Shanghai JiAi Genetics and IVF Institute, Obstetrics and Gynecology Hospital of Fudan University between January 2023 and December 2024, and were included in the study if they were expected to have difficulties in the identification of an embryo as proband.
Diagnostic test: Gametes (sperm or second polar bodies, MI eggs) or arrested embryos were reserved for identification of a proband
  1. Targeted deep sequencing for mosaicism detection for patients with suspected gonadal mosaicism, eg. Repeated similar abortion due to the same variant while the couple were tested negative for the variant in the peripheral blood.
  2. Ovarian stimulation, embryo culture, biopsy and vitrification as routinely used in the IVF clinical practice.
  3. Gametes and arrested embryo preservation by the embryo laboratory during embryo culture.
  4. Genetic testing, including multiple displacement amplification for WGA, variant sequencing in WGA products and Infinium Chip protocol for amplified DNA and haplotype analysis
Other Names:
  • Targeted deep sequencing for mosaicism detection
  • Ovarian stimulation, embryo culture, biopsy and vitrification
  • Genetic testing

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Consistence of the PGT-M with prenatal diagnosis with amniocentesis
Time Frame: 16 weeks of gestation
whether the PGT-M result of the embryos are consistent with the prenatal genetic testing result of amniocentesis
16 weeks of gestation

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
ShangHai Ji Ai Genetics & IVF Institute

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Yilun Sui, MD, Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan 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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2023

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2024

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 3, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 5, 2024

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 9, 2024

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 9, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 5, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2024

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • JIAI E2023-12

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The de-identified IPD will be published along with the publications of this study

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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