Presence of haptoglobin-2 allele is associated with worse functional outcomes after spontaneous intracerebral hemorrhage.

Abstract

OBJECTIVE:

To determine if the haptoglobin (Hp) phenotype, which has been shown to be a predictor of clinical outcomes in cerebrovascular disorders, particularly subarachnoid hemorrhage, was predictive of functional outcomes after spontaneous intracerebral hemorrhage (ICH).

METHODS:

Patients admitted with a diagnosis of ICH were prospectively included and divided into 3 groups based on their genetically determined Hp phenotype: 1-1, 2-1, and 2-2. Outcome measures included mortality and 30-day modified Rankin Scale scores. Demographics and outcomes were compared for each phenotype using multivariate linear regression analysis.

RESULTS:

The study included 94 patients. The distribution of Hp phenotype was Hp 1-1, 12 (13%); Hp 2-1, 46 (49%); and Hp 2-2, 36 (38%). The 3 Hp subgroups did not differ in terms of demographic variables, comorbidities, or ICH characteristics. There was a nonsignificant trend toward increased mortality in Hp 2-1 and Hp 2-2 compared with Hp 1-1, with mortality of 8% in Hp 1-1, 17% in Hp 2-1, and 25% in Hp 2-2 (P = 0.408). In the regression model adjusted for confounders, Hp 2-1 (odds ratio = 0.05, 95% confidence interval = 0.01-0.47, P < 0.001) and Hp 2-2 phenotypes (odds ratio = 0.14, 95% confidence interval = 0.02-0.86, P = 0.045) had significantly lower odds of modified Rankin Scale scores 0-2 compared with Hp 1-1.

CONCLUSIONS:

After ICH, individuals with the Hp-2 allele (2-1 and 2-2) had worse functional outcomes than individuals with the Hp-1 allele (Hp 1-1). There was a nonsignificant association between Hp phenotype and mortality. Larger prospective studies with better surrogates of ICH outcomes are warranted.

• Authors: Santosh B Murthy, Andrew P Levy, Joshua Duckworth, Eric B Schneider, Hadar Shalom, Daniel F Hanley, Rafael J Tamargo, Paul A Nyquist
• Journal: World neurosurgery (World Neurosurg) Vol. 83 Issue 4 Pg. 583-7 (Apr 2015) ISSN: 1878-8769 [Electronic] United States
• PMID: 25527876 (Publication Type: Journal Article)
• Copyright: Copyright © 2015 Elsevier Inc. All rights reserved.

Chemical References

• Haptoglobins

Topics

• Adult
• Aged
• Alleles
• Cohort Studies
• Female
• Glasgow Coma Scale
• Haptoglobins (genetics)
• Humans
• Hypertension (complications, genetics)
• Intracranial Hemorrhages (genetics, mortality, therapy)
• Male
• Middle Aged
• Phenotype
• Prospective Studies
• Risk Factors
• Subarachnoid Hemorrhage (genetics, mortality, therapy)
• Treatment Outcome