Genome-wide association study in African Americans with acute respiratory distress syndrome identifies the selectin P ligand gene as a risk factor

Christian Bime, Nima Pouladi, Saad Sammani, Ken Batai, Nancy Casanova, Tong Zhou, Carrie L. Kempf, Xiaoguang Sun, Sara M. Camp, Ting Wang, Rick A. Kittles, Yves A. Lussier, Tiffanie K. Jones, John P. Reilly, Nuala J. Meyer, Jason D. Christie, Jason H. Karnes, Manuel Gonzalez-Garay, David C. Christiani, Charles R. YatesMark M. Wurfel, Gianfranco U. Meduri, Joe G.N. Garcia

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Rationale: Genetic factors are involved in acute respiratory distress syndrome (ARDS) susceptibility. Identification of novel candidate genes associated with increased risk and severity will improve our understanding of ARDS pathophysiology and enhance efforts to develop novel preventive and therapeutic approaches. Objectives: To identify genetic susceptibility targets for ARDS. Methods: A genome-wide association study was performed on 232 African American patients with ARDS and 162 at-risk control subjects. The Identify Candidate Causal SNPs and Pathways platform was used to infer the association of known gene sets with the top prioritized intragenic SNPs. Preclinical validation of SELPLG (selectin P ligand gene) was performed using mouse models of LPS- and ventilator-induced lung injury. Exonic variation within SELPLG distinguishing patients with ARDS from sepsis control subjects was confirmed in an independent cohort. Measurements and Main Results: Pathway prioritization analysis identified a nonsynonymous coding SNP (rs2228315) within SELPLG, encoding P-selectin glycoprotein ligand 1, to be associated with increased susceptibility. In an independent cohort, two exonic SELPLG SNPs were significantly associated with ARDS susceptibility. Additional support for SELPLG as an ARDS candidate gene was derived from preclinical ARDS models where SELPLG gene expression in lung tissues was significantly increased in both ventilator-induced (twofold increase) and LPS-induced (5.7-fold increase) murine lung injury models compared with controls. Furthermore, Selplg2/2 mice exhibited significantly reduced LPS-induced inflammatory lung injury compared with wild-type C57/B6 mice. Finally, an antibody that neutralizes P-selectin glycoprotein ligand 1 significantly attenuated LPS-induced lung inflammation. Conclusions: These findings identify SELPLG as a novel ARDS susceptibility gene among individuals of European and African descent.

Original languageEnglish (US)
Pages (from-to)1421-1432
Number of pages12
JournalAmerican journal of respiratory and critical care medicine
Volume197
Issue number11
DOIs
StatePublished - Jun 1 2018

Keywords

  • Acute respiratory distress syndrome
  • Genome-wide association study
  • Selectin P ligand gene

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine

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