ArticlePrenatal diagnosis2022
Tricky TRIC: A replication study using trophoblast retrieval and isolation from the cervix to study genetic birth defects.
Article in Prenatal diagnosis, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 5 citations in OpenAlex.
- Trophoblast Enrichment by Maternal Immune-Cell Depletion Using CD45 and CD56 Surface Markers in Trophoblast Retrieval and Isolation from the Cervix (TRIC).Diagnostics (Basel, Switzerland) · 2026Article
- Trophoblast Retrieval from the Cervix (TRIC) Across Early Gestation: A Multi-Method Assessment of Extravillous Trophoblast Recovery.International journal of molecular sciences · 2026Article
- Article
- Common chromosomal aneuploidy testing using non-invasive trophoblast retrieval and isolation from the cervix (TRIC) in pregnant women.Archives of gynecology and obstetrics · 2025Article
- Limitations of Semi-Automated Immunomagnetic Separation of HLA-G-Positive Trophoblasts from Papanicolaou Smears for Prenatal Genetic Diagnostics.Diagnostics (Basel, Switzerland) · 2025Article
- Cervical EVT isolation for non-invasive fetal HLA typing in early pregnancy is limited by purity and maternal cell contamination; a methodological comparison.Frontiers in immunology · 2025Article
- A Novel Paradigm for Non-Invasive Prenatal Genetic Screening: Trophoblast Retrieval and Isolation from the Cervix (TRIC).Diagnostics (Basel, Switzerland) · 2023Review
- Tricky TRIC: A replication study using trophoblast retrieval and isolation from the cervix to study genetic birth defects.Prenatal diagnosis · 2022Article
Corrections and comments
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Authors and funding
9 authors at 2 institutions in 1 country.
Funding
Abstract
objectiveNoninvasive Prenatal Diagnosis has recently been introduced for a limited number of monogenetic disorders. However, the majority of DNA diagnostics still require fetal material obtained using an invasive test. Recently, a novel technique, TRIC (Trophoblast Retrieval and Isolation from the Cervix), has been described, which collects fetal trophoblast cells by endocervical sampling. Since this technique has not been successfully replicated by other groups, we aimed to achieve this in the current study.
methodPregnant women referred for transvaginal chorionic villous sampling (CVS) were asked for an endocervical sample prior to CVS. The TRIC samples were processed to isolate trophoblast DNA. TRIC DNA was used in ForenSeq to determine the amount of maternal DNA contamination, and for Sanger sequencing in case of a monogenic disorder.
results23%-44% of samples had a sufficiently high fetal DNA fraction to allow genetic testing, as calculated by Sanger sequencing and ForenSeq, respectively.
conclusionWe have been able to successfully replicate the TRIC protocol, although with a much lower success rate as described by the original study performing TRIC. As we obtained the samples in the actual clinical setting envisioned, the method in its current setup is not advisable for use in prenatal diagnostics.
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