Genome-wide association study of sepsis in extremely premature infants Journal Articles uri icon

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  • OBJECTIVE: To identify genetic variants associated with sepsis (early-onset and late-onset) using a genome-wide association (GWA) analysis in a cohort of extremely premature infants. STUDY DESIGN: Previously generated GWA data from the Neonatal Research Network's anonymised genomic database biorepository of extremely premature infants were used for this study. Sepsis was defined as culture-positive early-onset or late-onset sepsis or culture-proven meningitis. Genomic and whole-genome-amplified DNA was genotyped for 1.2 million single-nucleotide polymorphisms (SNPs); 91% of SNPs were successfully genotyped. We imputed 7.2 million additional SNPs. p Values and false discovery rates (FDRs) were calculated from multivariate logistic regression analysis adjusting for gender, gestational age and ancestry. Target statistical value was p<10-5. Secondary analyses assessed associations of SNPs with pathogen type. Pathway analyses were also run on primary and secondary end points. RESULTS: Data from 757 extremely premature infants were included: 351 infants with sepsis and 406 infants without sepsis. No SNPs reached genome-wide significance levels (5×10-8); two SNPs in proximity to FOXC2 and FOXL1 genes achieved target levels of significance. In secondary analyses, SNPs for ELMO1, IRAK2 (Gram-positive sepsis), RALA, IMMP2L (Gram-negative sepsis) and PIEZO2 (fungal sepsis) met target significance levels. Pathways associated with sepsis and Gram-negative sepsis included gap junctions, fibroblast growth factor receptors, regulators of cell division and interleukin-1-associated receptor kinase 2 (p values<0.001 and FDR<20%). CONCLUSIONS: No SNPs met genome-wide significance in this cohort of extremely low birthweight infants; however, areas of potential association and pathways meriting further study were identified.


  • Srinivasan, Lakshmi
  • Page, Grier
  • Kirpalani, Haresh
  • Murray, Jeffrey C
  • Das, Abhik
  • Higgins, Rosemary D
  • Carlo, Waldemar A
  • Bell, Edward F
  • Goldberg, Ronald N
  • Schibler, Kurt
  • Sood, Beena G
  • Stevenson, David K
  • Stoll, Barbara J
  • Van Meurs, Krisa P
  • Johnson, Karen J
  • Levy, Joshua
  • McDonald, Scott A
  • Zaterka-Baxter, Kristin M
  • Kennedy, Kathleen A
  • Sánchez, Pablo J
  • Duara, Shahnaz
  • Walsh, Michele C
  • Shankaran, Seetha
  • Wynn, James L
  • Cotten, C Michael

publication date

  • September 2017

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