Hollow-fiber blood-dialysis membranes: Superoxide generation, permeation, and dismutation measured by chemiluminescence

Ken Ichiro Yamamoto, Kazuyoshi Kobayashi, Kosuke Endo, Takehiro Miyasaka, Seiichi Mochizuki, Fukashi Kohori, Kiyotaka Sakai

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The interaction of blood with a material surface results in activation of the body's humoral immune system and the generation of reactive oxygen species (ROS). It has recently become clear that ROS are central to the pathology of many diseases. In this study, we evaluated the superoxide generation, permeation, and dismutation in hollow-fiber dialysis membranes by using 2-methyl-6-p-methoxyphenylethynyl-imidazopyrazinone (MPEC) as a superoxide-reactive chemiluminescence producer and an optical fiber probe to detect the resulting chemiluminescence in the hollow fiber lumen. We measured the superoxide generated when bovine blood leukocytes were brought into contact with dialysis membranes. Superoxide permeation was determined by measuring MPEC chemiluminescence in the hollow fiber lumen using an optical fiber probe. Additionally, superoxide dismutation was evaluated by examining the difference in superoxide permeability for membranes with and without vitamin E coating. Superoxide generation varies for different membrane materials, depending on the membrane's biocompatibility. Superoxide permeability depends on the diffusive permeability of membranes. No marked decrease in superoxide permeability was observed among membrane materials. The superoxide permeability of vitamin E-coated membrane was smaller than that of uncoated membrane. The antioxidant property of vitamin E-coated membranes is hence effective in causing superoxide dismutation.

Original languageEnglish
Pages (from-to)257-262
Number of pages6
JournalJournal of Artificial Organs
Volume8
Issue number4
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • 2-Methyl-6-p- methoxyphenylethynyl-imidazopyrazinone
  • Chemiluminescence
  • Dialysis membrane
  • Hollow fiber
  • Superoxide

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering
  • Cardiology and Cardiovascular Medicine

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