Monochloramine induced DNA fragmentation in gastric cell line MKN45

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

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAmerican Journal of Physiology - Gastrointestinal and Liver Physiology
Volume275
Issue number4 38-4
Publication statusPublished - 1998

Fingerprint

DNA Fragmentation
Stomach
DNA Cleavage
Cell Line
Sodium Hypochlorite
DNA
Incidence
Virulence Factors
Immunoenzyme Techniques
L-Lactate Dehydrogenase
Helicobacter pylori
Epithelial Cells
Cell Membrane
Apoptosis
Wounds and Injuries
chloramine

Keywords

  • Helicobacter pylori
  • Lactate dehydrogenase
  • Leukocyte
  • Mononucleosome
  • Oligonucleosome

ASJC Scopus subject areas

  • Gastroenterology
  • Physiology
  • Physiology (medical)

Cite this

Suzuki, H., Seto, K., Mori, M., Suzuki, M., Miura, S., & Ishii, H. (1998). Monochloramine induced DNA fragmentation in gastric cell line MKN45. American Journal of Physiology - Gastrointestinal and Liver Physiology, 275(4 38-4).

Monochloramine induced DNA fragmentation in gastric cell line MKN45. / Suzuki, Hidekazu; Seto, Koichi; Mori, Mikiji; Suzuki, Masayuki; Miura, Soichiro; Ishii, Hiromasa.

In: American Journal of Physiology - Gastrointestinal and Liver Physiology, Vol. 275, No. 4 38-4, 1998.

Research output: Contribution to journalArticle

Suzuki, H, Seto, K, Mori, M, Suzuki, M, Miura, S & Ishii, H 1998, 'Monochloramine induced DNA fragmentation in gastric cell line MKN45', American Journal of Physiology - Gastrointestinal and Liver Physiology, vol. 275, no. 4 38-4.
Suzuki, Hidekazu ; Seto, Koichi ; Mori, Mikiji ; Suzuki, Masayuki ; Miura, Soichiro ; Ishii, Hiromasa. / Monochloramine induced DNA fragmentation in gastric cell line MKN45. In: American Journal of Physiology - Gastrointestinal and Liver Physiology. 1998 ; Vol. 275, No. 4 38-4.
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