Dual-specificity phosphatase (DUSP) genetic variants predict pulmonary hypertension in patients with bronchopulmonary dysplasia

Pediatr Res. 2020 Jan;87(1):81-87. doi: 10.1038/s41390-019-0502-9. Epub 2019 Jul 22.

Abstract

Background: Pulmonary hypertension (PH) in patients with bronchopulmonary dysplasia (BPD) results from vasoconstriction and/or vascular remodeling, which can be regulated by mitogen-activated protein kinases (MAPKs). MAPKs are deactivated by dual-specificity phosphatases (DUSPs). We hypothesized that single-nucleotide polymorphisms (SNPs) in DUSP genes could be used to predict PH in BPD.

Methods: Preterm infants diagnosed with BPD (n = 188) were studied. PH was defined by echocardiographic criteria. Genomic DNA isolated from patient blood samples was analyzed for 31 SNPs in DUSP genes. Clinical characteristics and minor allele frequencies were compared between BPD-PH (cases) and BPD-without PH (control) groups. Biomarker models to predict PH in BPD using clinical and SNP data were tested by calculations of area under the ROC curve.

Results: In our BPD cohort, 32% (n = 61) had PH. Of the DUSP SNPs evaluated, DUSP1 SNP rs322351 was less common, and DUSP5 SNPs rs1042606 and rs3793892 were more common in cases than in controls. The best fit biomarker model combines clinical and DUSP genetic data with an area under the ROC curve of 0.76.

Conclusion: We identified three DUSP SNPs as potential BPD-PH biomarkers. Combining clinical and DUSP genetic data yields the most robust predictor for PH in BPD.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bronchopulmonary Dysplasia / complications
  • Bronchopulmonary Dysplasia / diagnosis
  • Bronchopulmonary Dysplasia / enzymology
  • Bronchopulmonary Dysplasia / genetics*
  • Case-Control Studies
  • Dual Specificity Phosphatase 1 / genetics*
  • Dual-Specificity Phosphatases / genetics*
  • Female
  • Genetic Association Studies
  • Genetic Predisposition to Disease
  • Humans
  • Hypertension, Pulmonary / diagnosis
  • Hypertension, Pulmonary / enzymology
  • Hypertension, Pulmonary / genetics*
  • Infant
  • Infant, Low Birth Weight
  • Infant, Newborn
  • Infant, Premature
  • Male
  • Phenotype
  • Polymorphism, Single Nucleotide*
  • Risk Assessment
  • Risk Factors

Substances

  • DUSP1 protein, human
  • DUSP5 protein, human
  • Dual Specificity Phosphatase 1
  • Dual-Specificity Phosphatases