A Japanese herbal medicine, sho-sako-to, prevents gut ischemia/reperfusion-induced hepatic microvascular dysfunction in rats

Yoshinori Horie, Mikio Kajihara, Yoshiyuki Yamagishi, Hiroyuki Kimura, Hironao Tamai, Shinzo Koto, Hiromasa Ishii

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background and Aim: We have reported that gut ischemia/reperfusion (I/R) causes hepatic microvascular dysfunction. Nitric oxide (NO) has been found to be a modulator of the adhesive interactions between leukocytes, platelets, and endothelial cells. Sho-saiko-to (TJ-9), a Japanese herbal medicine, is reported to have protective effects against liver injury and to regulate NO production. The objective of this study was to determine whether TJ-9 affects hepatic microvascular dysfunction elicited by gut I/R, and to investigate the role of NO. Methods: Male Wistar rats were exposed to 30 min of gut ischemia followed by 60 min of reperfusion. Intravital microscopy was used to monitor leukocyte recruitment and the number of non-perfused sinusoids (NPS). Plasma tumor necrosis factor (TNF)-α and alanine aminotransferase (ALT) activities were measured. In another set of experiments, TJ-9 (1 g/kg per day intragastrically) was administered to rats for 7 days. In some experiments, dexamethasone (ST) (2 mg/kg per day intravenously) was administered. Results: In control rats, gut I/R elicited increases in the number of stationary leukocytes, NPS, and plasma TNF-α and ALT activities, and these changes were mitigated by the pretreatment with TJ-9. Pretreatment with an NO synthase inhibitor diminished the protective effects of TJ-9 on the increase in leukostasis in the pericentral region, NPS, and plasma TNF-α levels, but not its effect on the increase in leukostasis in the midzonal region, total number of stationary leukocytes, or plasma ALT activities. Pretreatment with TJ-9 increased plasma nitrite/nitrate levels. The responses caused by gut I/R were attenuated by the pretreatment with ST. Pretreatment with an NO synthase inhibitor did not affect the effect of ST. Conclusions: These results suggest that TJ-9 attenuates the gut I/R-induced hepatic microvascular dysfunction and inflammatory responses such as TNF-α production in the early phase via enhancement of NO production, and sequential hepatocellular damage via its anti-inflammatory effect like corticosteroid effect.

Original languageEnglish
Pages (from-to)1260-1266
Number of pages7
JournalJournal of Gastroenterology and Hepatology (Australia)
Volume16
Issue number11
DOIs
Publication statusPublished - 2001

Fingerprint

Herbal Medicine
Reperfusion
Ischemia
Liver
Nitric Oxide
Leukostasis
Tumor Necrosis Factor-alpha
Alanine Transaminase
Leukocyte Count
Nitric Oxide Synthase
shosaiko-to
Nitrites
Adhesives
Nitrates
Dexamethasone
Wistar Rats
Adrenal Cortex Hormones
Leukocytes
Anti-Inflammatory Agents
Blood Platelets

Keywords

  • Corticosteroid
  • Herbal medicine
  • Intravital microscope
  • Nitric oxide
  • Tissue hypoxia

ASJC Scopus subject areas

  • Gastroenterology
  • Hepatology

Cite this

A Japanese herbal medicine, sho-sako-to, prevents gut ischemia/reperfusion-induced hepatic microvascular dysfunction in rats. / Horie, Yoshinori; Kajihara, Mikio; Yamagishi, Yoshiyuki; Kimura, Hiroyuki; Tamai, Hironao; Koto, Shinzo; Ishii, Hiromasa.

In: Journal of Gastroenterology and Hepatology (Australia), Vol. 16, No. 11, 2001, p. 1260-1266.

Research output: Contribution to journalArticle

Horie, Yoshinori ; Kajihara, Mikio ; Yamagishi, Yoshiyuki ; Kimura, Hiroyuki ; Tamai, Hironao ; Koto, Shinzo ; Ishii, Hiromasa. / A Japanese herbal medicine, sho-sako-to, prevents gut ischemia/reperfusion-induced hepatic microvascular dysfunction in rats. In: Journal of Gastroenterology and Hepatology (Australia). 2001 ; Vol. 16, No. 11. pp. 1260-1266.
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AU - Kimura, Hiroyuki

AU - Tamai, Hironao

AU - Koto, Shinzo

AU - Ishii, Hiromasa

PY - 2001

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N2 - Background and Aim: We have reported that gut ischemia/reperfusion (I/R) causes hepatic microvascular dysfunction. Nitric oxide (NO) has been found to be a modulator of the adhesive interactions between leukocytes, platelets, and endothelial cells. Sho-saiko-to (TJ-9), a Japanese herbal medicine, is reported to have protective effects against liver injury and to regulate NO production. The objective of this study was to determine whether TJ-9 affects hepatic microvascular dysfunction elicited by gut I/R, and to investigate the role of NO. Methods: Male Wistar rats were exposed to 30 min of gut ischemia followed by 60 min of reperfusion. Intravital microscopy was used to monitor leukocyte recruitment and the number of non-perfused sinusoids (NPS). Plasma tumor necrosis factor (TNF)-α and alanine aminotransferase (ALT) activities were measured. In another set of experiments, TJ-9 (1 g/kg per day intragastrically) was administered to rats for 7 days. In some experiments, dexamethasone (ST) (2 mg/kg per day intravenously) was administered. Results: In control rats, gut I/R elicited increases in the number of stationary leukocytes, NPS, and plasma TNF-α and ALT activities, and these changes were mitigated by the pretreatment with TJ-9. Pretreatment with an NO synthase inhibitor diminished the protective effects of TJ-9 on the increase in leukostasis in the pericentral region, NPS, and plasma TNF-α levels, but not its effect on the increase in leukostasis in the midzonal region, total number of stationary leukocytes, or plasma ALT activities. Pretreatment with TJ-9 increased plasma nitrite/nitrate levels. The responses caused by gut I/R were attenuated by the pretreatment with ST. Pretreatment with an NO synthase inhibitor did not affect the effect of ST. Conclusions: These results suggest that TJ-9 attenuates the gut I/R-induced hepatic microvascular dysfunction and inflammatory responses such as TNF-α production in the early phase via enhancement of NO production, and sequential hepatocellular damage via its anti-inflammatory effect like corticosteroid effect.

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