Plasma thrombin-cleaved osteopontin elevation after carotid artery stenting in symptomatic ischemic stroke patients

Mie Kurata, Takafumi Okura, Yoshiaki Kumon, Masahiko Tagawa, Hideaki Watanabe, Toshinori Nakahara, Tatsuhiko Miyazaki, Jitsuo Higaki, Masato Nose

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Atherothrombosis is the primary pathophysiology that underlies ischemic cerebral infarction. Osteopontin (OPN) is produced in atherosclerotic lesions and is cleaved by activated thrombin. We hypothesized that the rupture or damage of an unstable atherosclerotic plaque increases plasma levels of thrombin-cleaved OPN (trOPN). This study included 90 patients who received carotid angioplasty with stenting (CAS), 23 patients with essential hypertension (EHT) and 10 patients who were treated with carotid endarterectomy (CEA). The CAS patient group included 36 patients that had pre-and post-operative blood tests, diffusion-weighted imaging (DWI) using cerebral MRIs and estimated thrombus debris within the protection device. Immunohistochemistry of CEA specimens revealed that trOPN was detected around intra-plaque vessels. The highest tertile of plasma trOPN levels in CAS patients was higher than trOPN levels in EHT patients. Post-operative trOPN levels were significantly higher in symptomatic compared with asymptomatic patients (P=0.003). New ipsilateral DWI-positive patients revealed higher post-operative trOPN levels (P=0.003) and a higher grade of thrombi (P<0.001) than DWI-negative patients. TrOPN may be a novel biomarker that reflects the atherothrombotic status in ischemic stroke.

Original languageEnglish
Pages (from-to)207-212
Number of pages6
JournalHypertension Research
Volume35
Issue number2
DOIs
Publication statusPublished - 2012 Feb

Keywords

  • atherosclerosis
  • biomarker
  • stenting
  • stroke
  • thrombin-cleaved osteopontin

ASJC Scopus subject areas

  • Internal Medicine
  • Physiology
  • Cardiology and Cardiovascular Medicine

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