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Slim R, Khawajkie Y, Hoffner L, Tan L, Ab. Rafea B, Aguinagua M, Horowitz NS, Ao A, Tan SL, Brown R, Buckett W, Surti U, Hovanes K, Sahoo T, Sauthier P. P–553 Women with molar pregnancies have a genetic susceptibility to aneuploid miscarriages. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
What causes non-molar miscarriages in women with one hydatidiform mole (HM)?
Summary answer
We found a higher rate of aneuploidies in the non-molar miscarriages of women with HM than in those from women with sporadic or recurrent miscarriages.
What is known already
Women with hydatidiform moles have higher rates of miscarriages and women with recurrent miscarriages have higher rates of moles than women from the general population.
Study design, size, duration
We retrieved archived formalin-fixed paraffin embedded tissues from non-molar miscarriages of patients with one HM and analyzed them for the presence of aneuploidies using single nucleotide polymorphism (SNP)-microarray. We next determined the meiotic origin of the aneuploidies by genotyping the aneuploid non-molar miscarriages along with the parental genomes using microsatellite markers.
Participants/materials, setting, methods
All participants and some of their partners provided written consent to participate in our study, agreed to a blood draw for genotyping analysis, and agreed for us to retrieve their molar and non-molar tissues from various histopathology laboratories for research purposes.
Main results and the role of chance
We demonstrate for the first time that patients with an HM and miscarriages are at higher risk for aneuploid miscarriages [83.3%, 95% confidence interval (CI): 0.653–0.944] than women with sporadic (51.5%, 95% CI: 50.3–52.7%, p value = 0.0003828) or recurrent miscarriages (43.8%, 95% CI: 40.7–47.0%, p value = 0.00002). Genotyping the aneuploid miscarriages and the parental genomes demonstrated that most of the aneuploidies originated from errors in maternal meiosis I or II.
Limitations, reasons for caution
We were able to retrieve only 30 non-molar miscarriages from women with one HM for analysis. Expanding such analysis to a larger and independent cohort of miscarriages from such patients will be important to validate our observations.
Wider implications of the findings: Our data suggest common genetic female germline defects predisposing to HM and aneuploid non-molar miscarriages in some patients.
Trial registration number
Not applicable
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Affiliation(s)
- R Slim
- McGill University Health Center Research Institute, Department of Human Genetics and Obstetrics and Gynecology, Montreal- QC, Canada
| | - Y Khawajkie
- McGill University Health Center, Department of Obstetrics and Gynecology, Montreal- QC, Canada
| | - L Hoffner
- University of Pittsburgh- School of Medicine, Department of Pathology, Pittsburgh- PA, USA
| | - L Tan
- London Health Sciences Centre, The Fertility Clinic, London- ON, Canada
| | - B Ab. Rafea
- London Health Sciences Centre, The Fertility Clinic, London- ON, Canada
| | - M Aguinagua
- Instituto Nacional de Perinatologia, Genetics and Genomics Department, Mexico City, Mexico
| | - N S Horowitz
- Brigham and Women’s Hospital- Harvard Medical School, Division of Gynecologic Oncology- Department of Obstetrics- Gynecology and Reproductive Biology, Boston- MA, Canada
| | - A Ao
- McGill University Health Center, Department of Obstetrics and Gynecology, Montreal- QC, Canada
| | - S L Tan
- McGill University Health Center, Department of Obstetrics and Gynecology, Montreal- QC, Canada
| | - R Brown
- McGill University Health Center, Department of Obstetrics and Gynecology, Montreal- QC, Canada
| | - W Buckett
- McGill University Health Center, Department of Obstetrics and Gynecology, Montreal- QC, Canada
| | - U Surti
- University of Pittsburgh- School of Medicine, Department of Pathology, Pittsburgh- PA, USA
| | | | - T Sahoo
- Irvine, Invitae, ca 92618, USA
| | - P Sauthier
- Centre Hospitalier de l’Université de Montréal, Department of Obsterics and Gynecology- Gynecology Oncology Division, Montreal- QC, Canada
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