小檗碱对豚鼠回肠电解质转运影响的研究

Inhibition of electrolyte transport in isolated guinea-pig ileum by berberine

目的 :探讨小檗碱 (Ber)对正常豚鼠离体回肠和分泌性腹泻豚鼠离体回肠电解质转运的影响及其作用机制。方法 :利用霍乱毒素 (ChT)制成分泌性腹泻模型。通过UssingChamber技术测定豚鼠离体回肠膜电位差(PD)、膜短路电流 (SCC)和膜电阻 (R)。结果 :(1 )在含糖台氏液中 ,粘膜 (M)侧和浆膜 (S)侧Ber均可降低正常豚鼠和分泌性腹泻豚鼠离体回肠的PD和SCC(P <0 0 1 ,P <0 0 1 ) ,S侧 1 .0mmol·L- 1 的Ber还可降低R(P <0 0 1 ) ;(2 )在无糖台氏液中 ,仅S侧 1 0mmol·L- 1 的Ber可降低PD、SCC和R(P <0 0 1 ,P <0 0 1 ,P <0 0 5)。结论 :Ber不仅可抑制正常豚鼠回肠电解质转运 。

AIM: To investigate the effects of berberine (Ber) on ion transport and hypersecretion induced by cholera toxin(ChT) in ileum and its mechanism. METHODS: Ussing Chamber technique was used to measure the potential difference(PD), short-circuit current(SCC), and the resistance(R) in isolated guinea-pig ileum. The effects of Ber on PD, SCC and R in glucose Tyrode solution or glucose-free Tyrode solution were examined. The secretory diarrhoea model was made by ChT to investigate the effects of ChT and ChT+Ber on PD, SCC and R. RESULTS: (1)The PD and SCC were decreased in glucose Tyrode solution by the Ber added in mocosal side or in serosal side in ileum of normal guinea-pig and which was with secretory diarrhoea ( P<0.01, P<0.01 ). 1.0 mmol·L -1 Ber in serosal face also decreased the R ( P<0.01) . (2) In glucose-free Tyrode solution, the Ber in mucosal face did not decrease the PD, SCC and R, but 1.0 mmol·L -1 Ber in serosal face decreased the PD, SCC and R ( P<0.01, P<0.01, P<0.05 ). CONCLUSION: Ber not only inhibited electrogenic ion transport in normal guinea-pig ileum, but also reversed hypersecretion induced by ChT.