No observed association for mitochondrial SNPs with preterm delivery and related outcomes

• Published in: Pediatric research Vol. 72; no. 5; pp. 539 - 544
• Main Authors: Alleman, Brandon W., Myking, Solveig, Ryckman, Kelli K., Myhre, Ronny, Feingold, Eleanor, Feenstra, Bjarke, Geller, Frank, Boyd, Heather A., Shaffer, John R., Zhang, Qi, Begum, Ferdouse, Crosslin, David, Doheny, Kim, Pugh, Elizabeth, Pay, Aase Serine Devold, Østensen, Ingrid H.G., Morken, Nils-Halvdan, Magnus, Per, Marazita, Mary L., Jacobsson, Bo, Melbye, Mads, Murray, Jeffrey C.
• Format: Journal Article
• Language: English
• Published: New York Nature Publishing Group US 01.11.2012; Lippincott Williams & Wilkins
• Subjects: 631/208/457/649; 631/208/726/2129; 692/700/478/174; Biological and medical sciences; Case-Control Studies; Chi-Square Distribution; Denmark; Diseases of mother, fetus and pregnancy; DNA, Mitochondrial - genetics; General aspects; Genetic Predisposition to Disease; Genome-Wide Association Study; Gestational Age; Gynecology. Andrology. Obstetrics; Humans; Infant, Newborn; Infant, Premature; Medical sciences; Medicine; Medicine & Public Health; Norway; Odds Ratio; Pediatric Surgery; Pediatrics; Phenotype; Polymorphism, Single Nucleotide; population-study; Pregnancy. Fetus. Placenta; Premature Birth - genetics; Risk Assessment; Risk Factors; Denmark; Norway; Pediatrics; Mitochondria; Association; Prognosis; Pregnancy disorders; Prematurity; Nitric oxide; Premature delivery; Evolution
• ISSN: 0031-3998; 1530-0447; 1530-0447
• DOI: 10.1038/pr.2012.112

Background: Preterm delivery (PTD) is the leading cause of neonatal morbidity and mortality. Epidemiologic studies indicate recurrence of PTD is maternally inherited, creating a strong possibility that mitochondrial variants contribute to its etiology. This study examines the association between mitochondrial genotypes and PTD and related outcomes. Methods: This study combined, through meta-analysis, two case–control, genome-wide association studies: one from the Danish National Birth Cohort Study and one from the Norwegian Mother and Child Cohort Study (MoBa) conducted by the Norwegian Institute of Public Health. The outcomes of PTD (≤36 wk), very PTD (≤32 wk), and preterm prelabor rupture of membranes (PPROM) were examined. A total of 135 individual single-nucleotide polymorphism (SNP) associations were tested using the combined genome from mothers and neonates (case vs. control) in each population and then pooled via meta-analysis. Results: After meta-analysis, there were four SNPs for the outcome of PTD below P ≤ 0.10 and two below P ≤ 0.05. For the additional outcomes of very PTD and PPROM, there were three and four SNPs, respectively, below P ≤ 0.10. Conclusion: Given the number of tests, no single SNP reached study-wide significance ( P = 0.0006). Our study does not support the hypothesis that mitochondrial genetics contributes to the maternal transmission of PTD and related outcomes.