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Papasavva T, Martin P, Legler TJ, Liasides M, Anastasiou G, Christofides A, Christodoulou T, Demetriou S, Kerimis P, Kontos C, Leontiades G, Papapetrou D, Patroclos T, Phylaktou M, Zottis N, Karitzie E, Pavlou E, Kountouris P, Veldhuisen B, van der Schoot E, Kleanthous M. Prevalence of RhD status and clinical application of non-invasive prenatal determination of fetal RHD in maternal plasma: a 5 year experience in Cyprus. BMC Res Notes 2016; 9:198. [PMID: 27036548 PMCID: PMC4818414 DOI: 10.1186/s13104-016-2002-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 03/22/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND After the discovery that cell-free fetal DNA (cffDNA) is circulating in the maternal plasma of pregnant women, non-invasive prenatal diagnosis for fetal RhD in maternal plasma in RhD negative women at risk for haemolytic disease of the newborn (HDN) was clinically established and used by many laboratories. The objectives of this study are: (a) to assess the feasibility and report our experiences of the routine implementation of fetal RHD genotyping by analysis of cffDNA extracted from maternal plasma of RhD negative women at risk of HDN, and (b) to estimate the RhD phenotype frequencies, the RHD genotype frequencies and the RhD zygosity in the Cypriot population. METHODS cffDNA was extracted from maternal plasma of 73 RhD negative pregnant women. Real-Time Multiplex-PCR was used to amplify regions of RHD gene in exons 4, 5 and 10. RhD phenotypes were determined on 445 random samples using conventional agglutination slide test. RESULTS The fetus was predicted to be positive in 53 cases and negative in 18 cases. Two of cases were identified as D-variants, weak D type-1 and 11. The frequency of RhD negative homozygosity in the Cypriot population was estimated to be 7.2%, while the frequencies of RHD hemizygosity and RhD positive homozygosity was calculated to be 39.2 and 53.6%, respectively. CONCLUSION Fetal RHD genotyping can be accurately determined using cffDNA from maternal plasma. The implementation of the test has eliminated all use of unnecessary anti-D and reduced the total use of anti-D by 25.3% while achieving appropriate management of the RhD negative pregnancies.
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Affiliation(s)
- Thessalia Papasavva
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, 6 Internanional Airport Ave, Agios Dometios, 1683, Nicosia, Cyprus.
| | - Pete Martin
- International Blood Group Reference Laboratory, Bristol Institute for Transfusion Sciences, NHS Blood and Transport, North Bristol Park, Filton, Bristol, BS34 7QG, UK
| | - Tobias J Legler
- Department of Transfusion Medicine, University Medical Center Göttingen, Robert-Koch-Straße 40, 37075, Göttingen, Germany
| | - Marios Liasides
- Zoodochou Pigis Clinic, 9 Antisthenous, Kapsalos, 3086, Limassol, Cyprus
| | - George Anastasiou
- Mother and Child Medical Center, 9-11 Penelopis Delta Str., 1076, Nicosia, Cyprus
| | | | - Tasos Christodoulou
- Apollonion Private Hospital, Lefkotheou 20, Strovolos, 2054, Nicosia, Cyprus
| | - Sotos Demetriou
- European Woman's Clinic, Vyzantiou 26, Strovolos, 2064, Nicosia, Cyprus
| | - Prokopis Kerimis
- Ygia Polyclinic Private Hospital, 21, Nafpliou str., 3305, Limassol, Cyprus
| | - Charis Kontos
- Iasis Hospital, 8 Voriou Ipirou str., 8069, Paphos, Cyprus
| | | | - Demetris Papapetrou
- Mother and Child Medical Center, 9-11 Penelopis Delta Str., 1076, Nicosia, Cyprus
| | | | - Marios Phylaktou
- Apollonion Private Hospital, Lefkotheou 20, Strovolos, 2054, Nicosia, Cyprus
| | - Nikos Zottis
- Ledra Obstetrics Gynecology Clinic, 19 Pindarou, Ayios Antonios, 1060, Nicosia, Cyprus
| | - Eleni Karitzie
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, 6 Internanional Airport Ave, Agios Dometios, 1683, Nicosia, Cyprus
| | - Eleni Pavlou
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, 6 Internanional Airport Ave, Agios Dometios, 1683, Nicosia, Cyprus
| | - Petros Kountouris
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, 6 Internanional Airport Ave, Agios Dometios, 1683, Nicosia, Cyprus
| | | | | | - Marina Kleanthous
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, 6 Internanional Airport Ave, Agios Dometios, 1683, Nicosia, Cyprus
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