Hum. Reprod. Advance Access originally published online on December 5, 2008
Human Reproduction 2009 24(3):732-740; doi:10.1093/humrep/den423
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The experience of two European preimplantation genetic diagnosis centres on human leukocyte antigen typing
1 Centre for Reproductive Medicine, UZ Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium 2 Centre for Medical Genetics, UZ Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium 3 Centre for Preimplantation Genetic Diagnosis, "GENOMA"—Molecular Genetics Laboratories, Rome, Italy 4 Department of Philosophy and Moral Science, Bioethics Institute Ghent, Ghent University, Blandijnberg, 2, 9000 Ghent, Belgium
5 Correspondence address. Tel: +32-2-477-6696; Fax: +32-2-477-6692; E-mail: hilde.vandevelde{at}uzbrussel.be
BACKGROUND: Two European centres report on human leukocyte antigen (HLA) typing of preimplantation embryos for haematopoietic stem cell (HSC) transplantation: UZ Brussel in Brussels and Genoma in Rome. Both centres have 6 years experience with technical and clinical aspects of this type of genetic analysis on single blastomeres.
METHODS: Both centres apply a similar technique for preimplantation HLA typing using short tandem repeats linked to the HLA locus in multiplex PCR for haplotyping.
RESULTS: At present, a conclusive HLA diagnosis could be assured in 92.8% and 90.3% of the embryos at UZ Brussel and at Genoma, respectively. The implantation rates were 32.4% and 28.2%, respectively, and the birth rates per cycle were 9.4% and 18.6%, respectively. The HLA programme at UZ Brussel and at Genoma resulted in the birth of 9 babies and 3 successful HSC transplantations, and 42 babies and 7 successful HSC transplantations, respectively, so far.
CONCLUSIONS: Drastic embryo selection for preimplantation HLA typing (in theory 1/4 for HLA, 1/8 for HLA in combination with sexing for X-linked recessive diseases, 3/16 for HLA in combination with autosomal recessive disorders) resulted overall in the birth of 51 babies (15.9% live birth rate per started cycle) in two European centres.
Key words: preimplantation HLA typing/preimplantation genetic diagnosis/HLA matching/short tandem repeats/live birth rate
Submitted on April 25, 2008; resubmitted on October 30, 2008; accepted on November 4, 2008.
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