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Published in: Critical Care 1/2016

Open Access 01-12-2016 | Research

Association of common genetic variation in the protein C pathway genes with clinical outcomes in acute respiratory distress syndrome

Authors: Anil Sapru, Kathleen D. Liu, Joseph Wiemels, Helen Hansen, Ludmilla Pawlikowska, Annie Poon, Eric Jorgenson, John S. Witte, Carolyn S. Calfee, Lorraine B. Ware, Michael A. Matthay, the NHLBI ARDS Network

Published in: Critical Care | Issue 1/2016

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Abstract

Background

Altered plasma levels of protein C, thrombomodulin, and the endothelial protein C receptor are associated with poor clinical outcomes in patients with acute respiratory distress syndrome (ARDS). We hypothesized that common variants in these genes would be associated with mortality as well as ventilator-free and organ failure-free days in patients with ARDS.

Methods

We genotyped linkage disequilibrium-based tag single-nucleotide polymorphisms in the ProteinC, Thrombomodulin and Endothelial Protein C Reptor Genes among 320 self-identified white patients of European ancestry from the ARDS Network Fluid and Catheter Treatment Trial. We then tested their association with mortality as well as ventilator-free and organ-failure free days.

Results

The GG genotype of rs1042580 (p = 0.02) and CC genotype of rs3716123 (p = 0.002), both in the thrombomodulin gene, and GC/CC genotypes of rs9574 (p = 0.04) in the endothelial protein C receptor gene were independently associated with increased mortality. An additive effect on mortality (p < 0.001), ventilator-free days (p = 0.01), and organ failure-free days was observed with combinations of these high-risk genotypes. This association was independent of age, severity of illness, presence or absence of sepsis, and treatment allocation.

Conclusions

Genetic variants in thrombomodulin and endothelial protein C receptor genes are additively associated with mortality in ARDS. These findings suggest that genetic differences may be at least partially responsible for the observed associations between dysregulated coagulation and poor outcomes in ARDS.
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Metadata
Title
Association of common genetic variation in the protein C pathway genes with clinical outcomes in acute respiratory distress syndrome
Authors
Anil Sapru
Kathleen D. Liu
Joseph Wiemels
Helen Hansen
Ludmilla Pawlikowska
Annie Poon
Eric Jorgenson
John S. Witte
Carolyn S. Calfee
Lorraine B. Ware
Michael A. Matthay
the NHLBI ARDS Network
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Critical Care / Issue 1/2016
Electronic ISSN: 1364-8535
DOI
https://doi.org/10.1186/s13054-016-1330-5

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