AIM: To investigate the effect of emodin on small intestinal peristalsis of mice and to explore its relevant mechanisms.METHODS: The effect of emodin on small intestinal peristalsis of mice was observed by charcoal po...AIM: To investigate the effect of emodin on small intestinal peristalsis of mice and to explore its relevant mechanisms.METHODS: The effect of emodin on small intestinal peristalsis of mice was observed by charcoal powder propelling test of small intestine. The contents of motilin and somatostatin in small intestine of mice were determinated by radioimmunoassay. The electrical potential difference (PD) related to Na+ and glucose transport was measured across the wall of reverted intestinal sacs. Na+-K+-ATPase activity of small intestinal mucosa was measured by spectroscopic analysis.RESULTS: Different dosages of emodin can improve small intestinal peristalsis of mice. Emodin increased the content of motilin, while reduced the content of somatostatin in small intestine of mice significantly. Emodin 0.2, 0.4, 0.8, and 1.6 g/L decreased PD when there was glucose. However, emodin had little effect when glucose was free. The Na+-K+-ATPase activity of small intestinal mucosa of mice in emodin groups was inhibited obviously. CONCLUSION: Emodin can enhance the function of small intestinal peristalsis of mice by mechanisms of promoting secretion of motilin, lowering the content of somatostatin and inhibiting Na+-K+-ATPase activity of small intestinal mucosa.展开更多
Objective To inquire into the mechanism of toxic effect of nickel sulfate (NiSO 4) on heart, liver and kidney.Methods Several groups of rats were exposed to NiSO 4 at dose of 2.5,5 0, 10.0 mg/kg through intraperitonea...Objective To inquire into the mechanism of toxic effect of nickel sulfate (NiSO 4) on heart, liver and kidney.Methods Several groups of rats were exposed to NiSO 4 at dose of 2.5,5 0, 10.0 mg/kg through intraperitoneal infection for 10 days, the cell membrane of myocardium, liver and renal tubules were prepared to assess the activity of Na +·K + ATPase, Ca 2+ ATPase with spectrophotometric assay. Results The result showed that NiSO 4 was able to inhibit obviously the activity of Na +·K + ATPase, Ca 2+ ATPase of the three kinds of cell membrane, and its inhibitiue effect was shown to be the strongest in kidney and the weakest in liver.Conclusion The damage on rat’s heart, liver and kidney by NiSO 4 could be related to the inhibitive activity of cell membrane ATPase. However, the mechanism of toxic effect of nickel sulfate on heart, liver and kidney should be studied further.展开更多
文摘AIM: To investigate the effect of emodin on small intestinal peristalsis of mice and to explore its relevant mechanisms.METHODS: The effect of emodin on small intestinal peristalsis of mice was observed by charcoal powder propelling test of small intestine. The contents of motilin and somatostatin in small intestine of mice were determinated by radioimmunoassay. The electrical potential difference (PD) related to Na+ and glucose transport was measured across the wall of reverted intestinal sacs. Na+-K+-ATPase activity of small intestinal mucosa was measured by spectroscopic analysis.RESULTS: Different dosages of emodin can improve small intestinal peristalsis of mice. Emodin increased the content of motilin, while reduced the content of somatostatin in small intestine of mice significantly. Emodin 0.2, 0.4, 0.8, and 1.6 g/L decreased PD when there was glucose. However, emodin had little effect when glucose was free. The Na+-K+-ATPase activity of small intestinal mucosa of mice in emodin groups was inhibited obviously. CONCLUSION: Emodin can enhance the function of small intestinal peristalsis of mice by mechanisms of promoting secretion of motilin, lowering the content of somatostatin and inhibiting Na+-K+-ATPase activity of small intestinal mucosa.
文摘Objective To inquire into the mechanism of toxic effect of nickel sulfate (NiSO 4) on heart, liver and kidney.Methods Several groups of rats were exposed to NiSO 4 at dose of 2.5,5 0, 10.0 mg/kg through intraperitoneal infection for 10 days, the cell membrane of myocardium, liver and renal tubules were prepared to assess the activity of Na +·K + ATPase, Ca 2+ ATPase with spectrophotometric assay. Results The result showed that NiSO 4 was able to inhibit obviously the activity of Na +·K + ATPase, Ca 2+ ATPase of the three kinds of cell membrane, and its inhibitiue effect was shown to be the strongest in kidney and the weakest in liver.Conclusion The damage on rat’s heart, liver and kidney by NiSO 4 could be related to the inhibitive activity of cell membrane ATPase. However, the mechanism of toxic effect of nickel sulfate on heart, liver and kidney should be studied further.
