Gut mucosal blood flow: regional regulation or systemic pressure dependence?

Effect of Dansen on gastric mucosal Na+-K+-ATPase activity and gastric transmucosal potential difference during severe intraperitoneal infection in rats

AIM: To investigate the effect of Dansen on gastric mucosal Na⁺-K⁺-ATPase activity and gastric transmucosal potential difference during severe intraperitoneal infection in rats.

METHODS: The intraperitoneal infection rat model was established by cecal ligation and puncture (CLP). Assay of Na⁺-K⁺-ATPase activity in gastric mucosal tissue was conducted by biochemical method. The electric-physiological recorder was used to measure gastric mucosal potential difference.

RESULTS: The activity of Na⁺-K⁺-ATPase was markedly decreased in infected group at 3h after perforation, compared with the control group (P = 0.0 271 < 0.05). There was a minimum of Na⁺-K⁺-ATPase activity at 12h post-perforation in infected group (P = 0.0 062 < 0.01), only about 48.5% matched to the control group. Gastric transmucosal potential difference (GTPD) of infected group decreased significantly as compared with the control group (P = 0.0 253 < 0.05) at 6h after perforation, and rapidly dropped to the lowest at 12 h post-perforation (P = 0.0 025 < 0.01). At 12 h and 24 h after perforation, GTPD was lower in infected group than that in the control group (P = 0.0 293 < 0.05).

CONCLUSION: The reduce of Na⁺-K⁺-ATPase activity may play an important role in gastric mucosal barrier damage following severe abdominal infection induced by CLP, and the application of Dansen in earlier period can prevent the occurrence of stress ulcer.