High-sensitivity C-reactive protein and interleukin-6-dominant inflammation and ischemic stroke risk: The Northern Manhattan study

Jorge M. Luna, Yeseon P. Moon, Khin M. Liu, Steven Spitalnik, Myunghee C. Paik, Keun Cheung, Ralph L. Sacco, Mitchell S.V. Elkind

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

BACKGROUND AND PURPOSE - : Interleukin-6 (IL-6) is a proinflammatory cytokine with known autoregulatory feedback mechanisms. We hypothesized that elevated high-sensitivity C-reactive protein (hsCRP) relative to IL-6 confers an increased risk of ischemic stroke (IS), and low hsCRP relative to IL-6 a decreased risk, for individuals in the prospective, multiethnic, population-based Northern Manhattan Study (NOMAS). METHODS - : Serum hsCRP and IL-6 were measured in NOMAS participants at baseline. We created a trichotomized predictor based on the dominant biomarker in terms of quartiles: hsCRP-dominant, IL-6-dominant, and codominant groups. Cox proportional hazards models were used to calculate hazard ratios and 95% confidence intervals for the association between inflammatory biomarker group status and risk of incident IS. RESULTS - : Of 3298 participants, both hsCRP and IL-6 were available in 1656 participants (mean follow-up, 7.8 years; 113 incident IS). The hsCRP-dominant group had increased risk of IS (adjusted hazard ratio, 2.62; 95% confidence interval, 1.56-4.41) and the IL-6-dominant group had decreased risk (adjusted hazard ratio, 0.38; 95% confidence interval, 0.18-0.82) when compared with the referent group, after adjusting for potential confounders. Model fit was improved using the inflammation-dominant construct, over either biomarker alone. CONCLUSIONS - : In this multiethnic cohort, when hsCRP-quartile was higher than IL-6 quartile, IS risk was increased, and conversely when IL-6 quartiles were elevated relative to hsCRP, IS risk was decreased. Construct validity requires confirmation in other cohorts.

Original languageEnglish (US)
Pages (from-to)979-987
Number of pages9
JournalStroke
Volume45
Issue number4
DOIs
StatePublished - Apr 2014

Keywords

  • Biomarkers
  • Inflammation
  • Ischemic stroke
  • Prevention and control

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Clinical Neurology
  • Advanced and Specialized Nursing

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