Journal
JOURNAL OF ASSISTED REPRODUCTION AND GENETICS
Volume 27, Issue 11, Pages 641-648Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10815-010-9435-2
Keywords
Mitochondrial DNA; Deletion; Mutation; Repeated pregnancy loss
Funding
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
- Research and Clinical Center for Infertility of Shahid Sadughi University of Medical Science, Yazd, Iran
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Repeated pregnancy loss (RPL) occurs in 1 out of 300 couples, and the cause of about 50% of them remains idiopathic. Mitochondria have an important role in human development through ATP production and their involvement in apoptosis. 96 RPL and 96 control females were used to investigate the frequency of deletions and point mutations in the displacement loop (D-loop) on mitochondria. Multiplex PCR and DNA sequencing methods were used to detect possible variations in the mitochondrial DNA (mtDNA). No deletions but a high frequency of point mutations were found in RPL females; among 129 variations observed in RPL, 22 mutations were significant (P < 0.05) and the insertion of C in nucleotide 114 was novel. High rate of mutations in D-loop of mtDNA was observed in maternal blood, a fact that may have a direct or indirect role in inducing RPL. The results can be used in the assessment of RPL and designing possible treatments for improving assisted reproduction.
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