Hum. Reprod. Advance Access published online on November 11, 2006
Human Reproduction, doi:10.1093/humrep/del436
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1 Folkhälsan Institute of Genetics, University of Helsinki, Finland
* To whom correspondence should be addressed. BACKGROUND: Recurrent miscarriage (RM) has been suggested to be caused by mutations in genes coding for various coagulation factors resulting in thrombophilia. Mouse models indicate that genes involved in the protein C anticoagulant pathway are essential for normal embryonic development. Loss of function of two of these genes, thrombomodulin (TM) and endothelial protein C receptor (EPCR), causes embryonic lethality in mice. The aim of this study was to determine whether variations in the human TM or EPCR genes are associated with an increased risk for RM. METHODS: Forty-six RM patients and 191 controls were screened for mutations in TM and EPCR using denaturing high-performance liquid chromatography (DHPLC). The partners of 40 RM patients were also screened. RESULTS: One exonic and one intronic variation in TM and two exonic and two intronic sequences in EPCR were detected. Four variants were common in both patients and controls. A previously identified truncating mutation in EPCR, suggested to have a role in pregnancy complications, was identified in two patients and one control. A novel deletion in the 3'UTR region of TM was detected, but its significance remains unsolved. CONCLUSIONS: These data suggest that mutations in the TM or EPCR genes are not a major cause of RM, although they may exert a modifier effect in combination with other variants. *These authors have contributed equally to this work.
Received July 14, 2006
Revised September 14, 2006
Accepted October 16, 2006
Article
Variations in the thrombomodulin and endothelial protein C receptor genes in couples with recurrent miscarriage
M. Kaare 1 *, V.-M. Ulander 2 *, J.N. Painter 1, T. Ahvenainen 1, R. Kaaja 2, and K. Aittomäki 3 *
2 Department of Obstetrics and Gynecology, Helsinki University Central Hospital, Helsinki, Finland
3 Folkhälsan Institute of Genetics, University of Helsinki, Finland; Department of Clinical Genetics, Helsinki University Central Hospital, Helsinki, Finland
K. Aittomäki, E-mail: kristiina.aittomaki{at}hus.fi
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