Evaluation Of Gastric Antisecretory Antiulcer Activity Of Jambira (citrus Limon Linn.): An Experimental Study

Acid peptic disorders, especially hyperacidity is not uncommon in the current era because of altered life style of human being. In India prevalence of H. Pyloric infection in young age is 83.8%. Peptic ulcer occurs at young age with highest incidence between 20-40 years, men are affected more than women. If these Acid peptic disorders are not treated in time, it may lead to peptic ulcer, haematemasis, malena and perforation of duodenal ulcer which are common now a day with 50% mortality. Generally it is accepted that gastric ulcers result from an imbalance between aggressive factors and the maintenance of the mucosal integrity through endogenous defense mechanisms. Use of synthetic antiulcer drugs may damage to the cell membrane of mucosal, parietal and endothelial cells. To avoid such hazards, it is essential to find out some antiulcer agents from Ayurvedic treasure of therapeutics. Ancient sages have explained many herbal preparations which are beneficial in pain in abdomen (Shoola) and/or hyperacidity (Amlapitta) etc. Jambira (Citrus limon Linn.), mentioned as Shoola-hara (pain relieving) drug in Ayurvedic classics, is abundantly available and cost effective drug and may satisfy the need of present day situation by acting as potent herbal antacid drug. With this perspective, the study was taken for the critical assessment of gastric anti-secretory and anti-ulcer activity of Jambira (Citrus limon Linn.) as an experimental study but the results of experimental study did not support that Jambira (Citrus limon Linn.) fruit juice is a potent antisecretory and antiulcer natural source compared to control in pylorus ligation rat model.

Pharmacological evaluation of anti-ulcer activity of Cymbopogon fl exuosus.

Background: Peptic ulcer disease is a worldwide problem. Currently, there is no cost-effective treatment to relieve pain, heal the ulcer and prevent ulcer recurrence. Hence, there is a dire need to search and fi nd a suitable treatment from natural sources. The present study was designed to investigate the anti-ulcer activity of ethanol extract of the leaves of Cymbopogon fl exuosus. Methods: The ethanol extract of the leaves of Cymbopogon fl exuosus was prepared by hot extraction method. Anti-ulcer activity was evaluated in rats and method employed was pylorus ligation. Animals were divided into four groups of six animals each. The animals of Group I served as normal control (vehicle) which received normal saline (5 ml/kg b.wt., p.o). Group II and III received 200 and 400 mg/kg b.wt. of ethanol extract, respectively. The animals of Group IV served as standard control which received ranitidine (15 mg/kg bd.wt.). At the end of study parameters like ulcer index, free acidity, total acidity, acid volume, and pH were determined. Results: The ethanol extract showed a signifi cant reduction in the total acidity, free acidity, and acid volume. The effi cacy of plant extract at high dose was comparable with the standard drug - ranitidine. Conclusion: Our study results support the ethnomedical use of leaves of C. fl exuosus.

Mechanisms of Antiulcerogenic Effect of Garlic (Allium sativum) in Albino Rats.

Aims: The aim of the present study was to investigate the possible effects of garlic juice, as well as feed supplemented with Allium sativum, on gastric ulceration, antioxidant activity and gastric mucus cell count in wistar rats. Study Design: The albino rats were divided into six groups each group containing eight animals and treated for 30 days. A low dose (250mg/kg body weight) and high dose (500mg/kg) of garlic juice was orally administered to two of the experimental groups, while two other groups were fed with 5% and 10% Allium sativum/standard feed mix. The control group was fed on the standard rats’ feed and water only, while a positive control group was given Misoprostol (10μgkg-1) orally as a standard drug. Place and Duration of Study: Department of Physiology, University of Ibadan between September 2011 and June 2012. Methodology: Forty eight adult albino rats were divided equally into six groups. Groups I, II, III, IV, V and VI received fed standard, 250 mg Allium sativum /kg body weight, 500mg of Allium sativum/kg body weight, 5% supplement of Allium sativum, 10% supplement of Allium sativum and 10 ug of Misoprostol / kg body weight, respectively for 30 days. At the end of the study period, experimental ulceration was induced by administering 40mg/kg-1 body weight Indomethacin and six hours later the animals were sacrificed. The stomachs were excised and macroscopically examined for ulcers. Gastric mucous cell count (MCC) and antioxidant activity were subsequently assayed for. Results: The result showed that pre-treatment with garlic was significantly effective in reducing gastric ulceration incidence in animals (p < 0.05) as mean ulcer score decreased significantly in all groups treated with garlic. Superoxide dismutase (SOD) and catalase (CAT) increased significantly, especially in animals in the high dose group. No significant variation in the lipid per oxidation in all groups, while gastric mucus cell count was also significantly increased in most treatment groups. Conclusion: These results suggest that garlic decreases ulcerogenesis in experimental animals. This can be attributed to its effects of increasing antioxidant activity and gastric mucous cell count.

Gastroprotective effect of the iridoid fraction from Barleria prionitis leaves on experimentally-induced gastric ulceration / 中国天然药物

AIM@#To study the gastroprotective effect and in vivo antioxidant potential of a standardized iridoid fraction from B. prionitis leaves (BPE) against different gastric ulcer models in rats.@*METHOD@#The standardized iridoid fraction from BPE at 50, 100, and 200 mg/kg body weight was administered orally, twice daily for 5 days for prevention from aspirin, ethanol, cold-restraint stress (CRS), and pylorus ligation (PL)-induced ulcers. Estimation of the antioxidant enzyme activity was carried out in a CRS-induced ulcer model, and various gastric secretion parameters including volume of gastric juice, acid output, and pH value were estimated in the PL-induced ulcer model.@*RESULTS@#BPE showed a dose-dependent ulcer protective effect in PL (18.67%-66.26% protection), aspirin (24.65%-63.25% protection), CRS (20.77%-59.42% protection), and EtOH (16.93%-77.04% protection)-induced ulcers. BPE treatment in PL-rats showed a decrease in acid-pepsin secretion, and enhanced mucin and mucosal glycoproteins. However, BPE reduced the ulcer index with significant decrease in LPO (P < 0.01-0.001), SOD (P < 0.01-0.001), and an increase in CAT (P < 0.01-0.001), activity in the CRS-induced model.@*CONCLUSION@#The data shows that the iridoid fraction from BPE possesses anti-ulcerogenic and antioxidant potential.

Anti-ulcer activity of Bombax buonopozense P. Beauv. aqueous leaf extract (Fam: Bombacaceae).

The objective of this study was to investigate the anti-ulcer activity of leaves of Bombax buonopozense P. Beauv. (Bombacaceae) in rats. Fresh dried leaves of B.buonopozense were extracted by cold maceration which yielded a mucilaginuous aqueous extract. Anti-ulcer effects of the aqueous extract at 100, 200 and 400 mg/kg were evaluated in rats using ethanol-induced ulcer model. Phytochemical analysis and lethality tests (LD50) were carried out using standard procedures. Results showed that the aqueous extract exhibited significant (P<0.05) and dose- dependent anti-ulcer activity in the model used. Percentage ulcer inhibitions of extract at 100, 200 and 400 mg/kg for ethanol-induced ulcers were 39.76, 62.07 and 75.73% respectively. Ulcer protection in the model used by the extract is dose-dependent and the ulcer inhibitory effects of the extract are comparable to ranitidine. Oral LD50 value is 2828.42 mg/kg in mice. Phytochemical analysis showed the presence of flavonoids, saponins, tannins, resins, balsams, carbohydrates, oligosaccharides, terpenes, reducing sugars and sterols. Therefore, results of our study suggest that the aqueous extract of B. buonopozense possesses anti-ulcer activity as claimed by its folkloric use.

Anti-ulcer activity of Sandalwood (Santalum album L) stem hydro-alcoholic extract in three gastric-ulceration models of Wistar rats / Actividad anti-ulcerosa del tallo de Sándalo (Santalum album L) en extractos hidro-alcoholicosen tres modelos de ulceración gástrica de ratas Wistar

Sandalwood (Santalum album L.) is used in various traditional systems of medicine, like Ayurveda, Siddha and Unani medicine to treat a wide range of ailments. In Unani medicine, Safed Sandal is used to treat gastric ulcers, hence the present study was undertaken to confirm this claim. A limit test as per OECD guidelines was conducted at a dose of 5000 mg/kg to determine the acute toxic dose of Hydro-alcoholic extract from S. album stem (SASE). Two test doses of SASE (250 and 500 mg/kg) were subjected to screening of anti-ulcer activity by three in-vivo models namely – water immersion - restrain stress, ethanol and indomethacin induced gastric ulceration models in albino wistar rats. A proton-pump inhibitor, Omeprazole 10 mg/kg and H2 receptor antagonist, Ranitidine 50 mg/kg were employed as standard drugs. The results revealed an increase in gastric protection as a significant decrease (p < 0.001) in average number of ulcers, severity of ulcers and cumulative ulcer index was observed in the test groups. Histopathological evidences supported the above findings. The observed anti-ulcer effect of SASE at 500 mg/kg was comparable to that of standard drugs used in the experiments indicating significant anti-ulcer potential especially at higher concentration.

Sándalo (Santalum album L.) se utiliza en diversos sistemas de medicina tradicional, como el Ayurveda, Siddha y Unani para tratar una amplia gama de dolencias. En la medicina Unani, Safed Sandal se usa para tratar úlceras gástricas, por lo tanto, el presente estudio se realizó para confirmar esta afirmación. Una prueba de límite según las directrices de la OCDE se llevó a cabo a una dosis de 5000 mg/kg para determinar la dosis tóxica aguda del extracto hidroalcohólico del tallo de S. álbum (SASE). Dos dosis de prueba de SASE (250 y 500 mg/kg) se sometieron al estudio de la actividad anti-úlcera por tres modelos in vivo, a saber: la inmersión en agua – estrés de restricción, y la ulceración gástrica inducida por etanol e indometacina, en ratas Wistar albinas. Un inhibidor de la bomba de protones, omeprazol 10 mg/kg y el antagonista de los receptores H2, ranitidina 50 mg/kg fueron empleados como fármacos estándar. Los resultados revelaron un aumento de la protección gástrica como una disminución significativa (p < 0.001) en el número promedio de úlceras, la gravedad de las úlceras y el índice de úlcera acumulativo se observó en los grupos de prueba. Evidencias histopatológicas apoyaron las conclusiones anteriores. El efecto anti úlcera observado por efecto de SASE a 500 mg/kg fue comparable a la de fármacos estándar utilizados en los experimentos que indican un significativo potencial anti-úlcera, especialmente a mayores concentraciones.

Effect of Zinc Salts on Acid Secretion and Peptic Ulceration in Albino Rats.

The present study was carried out to see the effect of two zinc salts i.e zinc sulphate and zinc chloride on gastric ulcers induced by stress, pylorus ligation and aspirin in albino rats. The rats were divided into two main groups (zinc sulphate 30, 60, 90 mg/kg i.p and zinc chloride 10 and 20mg/kg i.p). They were further sub-divided into three sub-groups dependant on ulcer model i.e stress, pylorus ligation and aspirin induced ulcers. It was found that zinc sulphate and zinc chloride had a dose dependant reduction in ulcer index in all three models of gastric ulceration. Also, both the salts had anti acid secretory effect, raised pH of gastric secretion and reduced total acidity significantly. Thus zinc salts prevent gastric ulceration. Probably this effect is mediated by anti acid secretory action.

Protease inhibition activity of extracts from Salicaceae species from Brazilian Cerrado and Atlantic Rain Forest and of an enriched fraction of clerodane diterpenes (casearins) / Atividade biológica de uma fração enriquecida de diterpenos clerodânicos (casearinas) e de extratos de espécies de Salicaceae do Cerrado e Mata Atlântica em um ensaio de inibição de proteases

Considering the traditional use of Casearia sylvestris Sw., Salicaceae, to threat gastric injuries and the pre-clinical studies showing its efficacy we aimed to screen other species to explore the biological activity of some species of this family. For this, we used a protease inhibition assay as a model for searching gastric anti-ulcer plant extracts. The ethanolic and aqueous extracts from branches and leafs of C. gossypiosperma, C. decandra and C. rupestris showed high percentage inhibition of pepsin, approximately 50 percent, with 1 μg/mL concentration. Curiously, C. obliquoa and Flacourtia ramontchi did not inhibit pepsin, but its most apolar extract showed inhibitory activity in the subtilisin assay. The enriched fraction of clerodane diterpenes inhibited the activity (42.75 percent) of pepsin with 1 ug/mL, but it did not inhibit subtilisin (23.76 percent). The results obtained with apolar and polar extracts from branches and leaves of some species of Salicaceae showed a different pattern of inhibition of two proteases, the aspartic pepsin and the serinic subtilisin, related with different biological activities. The results with the enriched fraction of clerodane diterpenes suggests that the activity observed with the C. sylvestris may be related with the presence of these substances in the crude extract.

Considerando o uso popular de Casearia sylvestris Sw., Salicaceae, para o tratamento de problemas gástricos e resultados pré-clínicos que mostraram potencial atividade anti-ulcerogênica, foi realizado um screening farmacológico para avaliar a atividade biológica de outras espécies de Salicaceae. Para isso, foi utilizado um ensaio de inibição de proteases como um modelo farmacológico molecular para screening de extratos com atividade anti-ulcerogênica. Os extratos etanólico e aquoso dos galhos e folhas de C. gossypiosperma, C. decandra e C. rupestris mostraram inibição da atividade da pepsina em aproximadamente 50 por cento com a concentração de 1 μg/mL. Curiosamente, C. obliquoa e Flacourtia ramontchi não apresentaram atividade sobre a pepsina, mas seus extratos mais apolares mostraram atividade inibitória sobre a subtilisina. A fração enriquecida de diterpenos clerodânicos mostrou atividade inibitória (42,75 por cento) sobre a pepsina com a concentração de 1 μg/mL, mas não sobre a subtilisina (23,76 por cento). Os resultados obtidos com os extratos e folhas das espécies testadas mostraram um padrão de atividade diferente sobre os dois tipos de proteases, a pepsina e a subtilisina, as quais estão relacionadas com diferentes tipos de atividades biológicas. Ainda mais, os resultados com a fração enriquecida de diterpenos clerodânicos sugerem que estas substâncias podem estar relacionadas com a atividade do extrato bruto de C. sylvestris.