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Realization of Sequencing of All Known Human Genes in Case of Detection of Cerebral, Renal or Ophthalmological Fetal Malformations During Pregnancy in Order to Make an Etiological Diagnosis and to Precise the Fetal Prognosis

NCT04406480 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 90

Last updated 2020-11-13

No results posted yet for this study

Summary

Congenital malformations concern 3% of pregnancies; most of them can be seen during pregnancy. For some malformations, an invasive sample (trophoblast biopsy or amniocentesis) is proposed to search a chromosomal abnormality by the technique of DNA chip. However, some strongly suggestive signs of a genetic (and not chromosomal) pathology have a very low diagnostic rate with this technique. In the absence of an etiological diagnosis, the prognosis for the unborn child is very difficult to assess, as we can't know if the fetal malformation is really isolated or associted to other unseen features as part of a syndromic condition.

For some malformations strongly suggestive of a genetic condition, we propose to realize an exome (i.e. all coding parts of the genome) sequencing of the trio (child and the 2 parents) with a delivery time compatible with the emergency situation of a pregnancy (6 weeks maximum). We will apply bioinformatics filters to analyse only genes known to be involved in the malformation present in the unborn child and thus avoid the identification of variants in unrelated genes. These lists of genes have been previously validated by the Rare Disease Health Sectors and the affiliated diagnostic laboratories. The selected malformations are: 1) anomalies of the central nervous system (microcephaly (\<- 2DS) with anomalies of gyration, anomalies of the posterior fossa, anomalies of the midline except agenesis of the corpus callosum), 2) ophthalmological anomalies (microphthalmia, hyperplasia vitreous) and 3) renal abnormalities (large hyperechoic kidneys).

Conditions

  • Fetal Malformation
  • Pregnancy Related
  • Rare Genetic Disease

Interventions

GENETIC

CGH-array and exome sequencing

A blood sample will be used for CGH-array and exome sequencing

Sponsors & Collaborators

  • University Hospital, Strasbourg, France

    lead OTHER

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2020-08-05
Primary Completion
2021-09-30
Completion
2023-09-30

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04406480 on ClinicalTrials.gov