Xanthine oxidase-mediated intracellular oxidative stress in response to cerulein in rat pancreatic acinar cells

Hidekazu Suzuki, Makoto Suematsu, Soichiro Miura, Hiroshi Asako, Iwao Kurose, Hiromasa Ishii, Shigenari Houzawa, Masaharu Tsuchiya

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Intralobular oxygen radical formation was examined in cerulein-stimulated rat pancreatic acinar cells by digital imaging microscopic fluorography using a hy-droperoxide-sensitive fluorescent probe, dichlorofluores-cin (DCFH) diacetate. The isolated pancreatic acinar cells loaded with DCFH diacetate were microscopically observed, and the dichlorofluorescein (DCF) fluorescence yielded by DCFH oxidation via hydroperoxides was digitally processed. Within the initial 20 min after the application of cerulein (10 μM), intracellular oxidative stress was observed as indicated by the increase in DCF fluorescence intensity and reached its maximum at 60 min. DCF fluorescence intensity was then gradually decreased until 80 min, followed by a marked increase in propidium iodide (PI) fluorescence, suggesting irreversible cell death. Allopurinol (1 μM), a xanthine oxidase inhibitor, significantly attenuated the early increase of DCF fluorescence intensity as well as the late cell damage. Treatment with hyperbaric oxygen (PO2300 mm Hg) also significantly attenuated both the increase of DCF fluorescence and the number of Pl-positive cells. The results suggest that xanthine oxidase-mediated oxygen radicals may play an important role in cerulein-induced intracellular oxidative stress in pancreatic acinar cells of rats.

本文言語English
ページ(範囲)465-470
ページ数6
ジャーナルPancreas
8
4
DOI
出版ステータスPublished - 1993 7

ASJC Scopus subject areas

  • 内科学
  • 内分泌学、糖尿病および代謝内科学
  • 肝臓学
  • 内分泌学

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