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Objective To investigate the anti-ulcer effects of Albizia chinensis(Osbeck)Merr. extract on rats with acetic acid-induced chronic gastric ulcer and explore the anti-inflammatory mechanism. Methods Wistar male rats(n=50)were randomized in-to five groups:control,model,famotidine,Albizia chinensis extract 100 and 200 mg/kg groups. In the experiment,30%acetic acid was used to induce chronic gastric ulcer in rats. The anti-ulcer effects of A. chinensis extract were evaluated by measuring the changes in general behavior of rats,gastric tissue morphology and the ulcer area after 12 d treatments. Wistar male rats(n=48)were random-ized into three groups:control,model and A. chinensis extract(200 mg/kg)groups. At 3 d after operation,the animals were sacrificed and stomachs were rapidly removed and processed for subsequent assays. The contents of TNF-αand IL-6 were evaluated by ELISA. The activity of myeloperoxidase(MPO)was tested by o-dianisidine method. Furthermore Western blot was used to examine the phos-phorylation of P38 and JNK. Results Compared with the model group,the gastric ulcer areas of rats were reduced by 38.4%(P<0.05)and the activity of MPO declined by 37.3%(P<0.01)in A. chinensis extract(200 mg/kg)group. Meanwhile the contents of TNF-αand IL-6 in A. chinensis extract(200 mg/kg)group respectively decreased by 43.8%(P<0.01)and 32.7%(P<0.01)com-pared with the model group. A. chinensis extract(200 mg/kg)obviously suppresed the phosphorylation of P38(P<0.01),but phos-phorylation of JNK and expression of P38 and JNK remained nearly unaltered. Conclusion A. chinensis extract(200 mg/kg)exhibits a protective effect on acetic acid-induced chronic gastric ulcer,which might be relevant to anti-inflammation by inhibiting the p38 sig-naling pathway but not JNK signaling pathway. A. chinensis extract(200 mg/kg)has no effect on JNK signaling pathway.
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ObjectiveTo evaluate the gastroprotective activity of ascaridole.MethodsThe gastroprotective effect of ascaridole was evaluated on ulcer healing in rats with acetic acid-induced chronic gastric ulcer,pylorus ligation- and Aspirininduced gastric ulcer.Ascaridole was ig administered with the dosages of 10 and 20 mg/kg once daily for 7 d.Results Ascaridole showed the significant anti-ulcer effects.In acetic acid-induced gastric ulcer rats,the ulcer areas after 10 and 20 mg/kg of ascaridole treatment were (65.1 ± 20.0) and (50.6 ± 11.0) mm2,respectively,which were significant lower (P ＜ 0.01) than that of the control group [(116.7 ± 35.8) mm2].For pylorus ligation model,ascaridole showed a gastric ulcer healing effect in a dose-dependent manner.Ascaridole at the dose of 20 mg/kg showed 50％ ulcer protection and had a significant (P ＜ 0.05) gastroprotective activity since it decreased the total acidity and pepsin activity.Compared to the control group,the two dosages of ascaridole showed the significant reduction (P ＜ 0.05) in the ulcer index on Aspirin-induced ulcer.ConclusionThis study provides evidence that ascaridole shows potential efficacy on the healing of gastric ulcers induced by acetic acid,Aspirin,and pylorus ligation.
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AIM To study the effects of rh bFGF on healing quality of chronic gastric ulcer in rats. METHODS Ulcer model induced by acetic acid was established. Rats were treated with rh bFGF ig until ulcer healing and then continually treated for 10 days(30 total treatment days). The effects of rh bFGF on healing quality of chronic gastric ulcer was evaluated not only from gastric mucoal barrier tissue structure but also from gastric mucus barrier. RESULTS rh bFGF( 5 000 ～ 10 000 AU?kg -1 ) increased the thickness of regenerated gastric mucosa, lowed its abnormity degree and made its align state near to normal. rh bFGF( 2 500 ～ 10 000 AU?kg -1 ) increased collagen and capillary density in scar tissue, added mucus quantity, mucopolysaccharide layer's thickness and PGE 2 content on the surface of regenerated gastric mucosa. CONCLUSION rh bFGF has effects of promoting gastric mucosal barrier to mature, increasing the function of gastric mucus barrier and increasing the quality of ulcer healing.