Monochloramine induced DNA fragmentation in gastric cell line MKN45

Hidekazu Suzuki, Koichi Seto, Mikiji Mori, Masayuki Suzuki, Soichiro Miura, Hiromasa Ishii

研究成果: Article査読

68 被引用数 (Scopus)


monochloramine (NH2Cl) is known to be one of the virulence factors in Helicobacter pylori-associated gastric mucosal injury. The present study was designed to examine NH2Cl-evoked Dna fragmentation in the gastric epithelial cell line MKN45. NH2Cl was produced by mixing NH3 with sodium hypochlorite (NaClO). MKN45 cells were exposed to NH2Cl, NH3, or NaClO in Hanks' balanced salt solution. DNA cleavage was evaluated quantitatively by photometeric enzyme immunoassay for the in vitro determination of cytoplasmic mono- and oligonucleosomes. Damage to the plasma membrane was assessed by measuring the activity of lactate dehydrogenase in the supernatants. Separately, DNA ladder formation was performed to confirm the incidence of Dna fragmentation. NH2Cl (0.001-0.01 mm) significantly increased the cytoplasmic mono- and oligonucleosomes, suggesting the incidence of DNA cleavage. The DNA ladder was clearly evoked by NH2Cl. NH2Cl induced a DNA fragmentation, one of the important aspects in apoptosis, in the gastric cell line Mkn45.

ジャーナルAmerican Journal of Physiology - Gastrointestinal and Liver Physiology
4 38-4
出版ステータスPublished - 1998

ASJC Scopus subject areas

  • 生理学
  • 肝臓学
  • 消化器病学
  • 生理学(医学)


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