Induction of Heme Oxygenase-1 by Traditional Herb Mix Extract Improves MKN-74 Cell Survival and Reduces Stomach Bleeding in Rats by Ethanol and Aspirin in vivo

  • Kang, Young-Jin (Department of Pharmacology, College of Medicine, Yeungnam University) ;
  • Moon, Hyung-Suk (Department of Pharmacology and Institute of Health Science, School of Medicine, Gyeongsang National University) ;
  • Kim, Hye-Jung (Department of Pharmacology and Institute of Health Science, School of Medicine, Gyeongsang National University) ;
  • Seo, Han-Geuk (Department of Pharmacology and Institute of Health Science, School of Medicine, Gyeongsang National University) ;
  • Lee, Jae-Heun (Department of Pharmacology and Institute of Health Science, School of Medicine, Gyeongsang National University) ;
  • Chang, Ki-Churl (Department of Pharmacology and Institute of Health Science, School of Medicine, Gyeongsang National University)
  • Published : 2007.04.30

Abstract

Chinese herb medicines have traditionally been used to treat or alleviate the symptom of various diseases. The rationale for use of certain herbs to certain disorder is now getting unveiled by modern technology. In the present study, we investigated whether herb mix extract(HMX), which is alleged to be useful for gastric ulcer, protects stomach from oxidative stress. Rats were allowed to normal diet with and without HMX (1, 5, 10 mg/kg) for 30 days. To induce gastric ulcer, ethanol (75%, 1.5 ml) or acidified aspirin (100 mg/kg in 0.2 N HCl) was administered by oral route in 24 h-fasted rats and examined the gastric ulceration(bleeding) by measuring the size 1 h after the treatment. Results indicated the area of gastric bleeding was significantly less in HMX fed rats than in normal diet fed ones, and it was dependent on the duration and amount of HMX. To investigate the underlying mechanism by which HMX protects stomach from oxidative stress, expression of enzymes like heme oxygenase (HO), cyclooxygenase (COX), and inducible nitric oxide (iNOS) were investigated in MKN-74 cells, where aspirin or H. pylori was introduced. The results were compared with RAW 264.7 cells to check if there's cell specificities exist. The expression of HO-1 but not COX-2, iNOS was significantly increased by HMX. Furthermore, HO-1 inhibitor, SnPP IX reduced the HO-1 activity and reversed the survival rate in HMX-treated MKN-74 cells. There's no difference between RAW 264.7 cells and MKN-74 cells. We, thus, concluded that HMX is beneficial for protection from oxidative injury, and induction of HO-1 by HMX in gastric cells is, at least, responsible for protection from oxidative stress such as ethanol, aspirin and possibly H. pylori infection.

Keywords

References

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