ABSTRACT
Background and Objectives: There is increase prevalence of gastric ulcer in the society, but the drugs that are sensitive for radical cure are not screened with physiologic markers such which affect proper management of the disease. The objective of the study is to relate various sources or organ specific templates: gastrin, histamine and prostaglandin relating with the disease in evaluating the potencies of cimetidine, ranitidine and omeprazole for best choice of the drugs in gastric ulcer disease treatment.Material and Methods: Plasma, gastric and antral prostaglandins, histamine and gastrin levels were studied in ninety-six (96), male and female Swiss albino rats for 28 days, using high performance liquid chromatography.Results: Male and female rats with gastric ulcer treated with cimetidine, omepraszole and ranitidine showed no significant difference (P>0.5) in gastrin and the drug groups in plasma, gastric and antral concentrations. But, there was significant difference (P<0.05) in histamine levels between cimetidine, omeprazole and ranitidine in their gastric and plasma concentration. There was no significant difference (P>0.05) in prostaglandin values between cimetidine, omeprazole and ranitidine. Also there was no significant difference (P>0.05) in gastric and plasma levels of gastrin, histamine and prostaglandin between 7, 14, 21 and 28 days treatment period. But, there was significant difference (P<0.05) in antral concentration of gastrin, histamines and prostaglandin between the drug groups. However, there was no significant difference (P>0.05) in antral gastrin between male and female rats in cimetidine and ranitidine treatment. The three drugs were associated with high levels of gastrin, histamine, low prostaglandin though cimetidine showed higher concentration of prostaglandin.Conclusion: It is concluded that gastrin, histamine and prostaglandin are sensitive indicators in evaluating anti-ulcerogenic drugs efficacies.
ABSTRACT
Introduction: species of the family Cyperaceae are commonly used by the population to treat gastric disorders.However, there are a few ethnopharmacological studies about this family Lagenocarpus rigidus (Kunth) Ness, Cyperaceae, is one of the most widespread swamp species. Objective: evaluate the gastric activity of L. rigidus and its chemical characterization. Methods: ethanolic extract of L. rigidus (ELR) leaves prepared by percolation was subjected to total polyphenol and flavonoid quantification, as well as HPLC quantification of some flavonoids. Angiotensin converting enzyme (ACE) inhibition was determined by colorimetric assays.The gastric effects of ELR were tested in male Wistar rats (n = 6 each group) treated with different doses (600, 60 and 6 mg/kg i.p.) ELR.Gastric lesions were induced by administration of indomethacin (30 mg/kg s.c.).The number of ulcers and the index of mucosal damage (IMD) were determined taking into account the color, edema and bleeding of gastric lesions, the number of petechiae, and the number and size of the ulcers. Statistical analysis of data was performed with one-way ANOVA followed by Tukey's test; significance was p < 0.05. Results: ELR inhibited the ACE (68.5±18.1%) at a concentration of 100 mg/mL.Oral administration of ELR (6, 60 and 600 mg/kg) showed protective activity against indomethacin-induced gastric injury. Total polyphenols in ELR were 157.7 ± 5.8 mg pirogalol/mg equivalent flavonoids and 66.9 ± 3.1 µg equivalent quercetin/mg. Conclusion: L. rigidus protects against acute gastric damage induced by indomethacin in an independent dose manner.
Introducción: las especies de la familia Cyperaceae popularmente se utilizan para tratar trastornos gástricos. Sin embargo, hay pocos estudios etnofarmacológicos sobre esta familia. Lagenocarpus rigidus (Kunth) Ness, Cyperaceae, es una de las especies más grandes de población en pantano. Objetivo: evaluar la actividad gástrica de L. rigidus, junto a su caracterización química. Métodos: el extracto etanólico de hojas de L. rigidus (ELR), preparado por percolación fue objeto de cuantificación de polifenoles y flavonoides totales, cuantificación por HPLC de algunos flavonoides. La inhibición de la enzima convertidora de angiotensina (ECA) se realizó por ensayos colorimétricos. Los efectos gástricos de ELR se llevó a cabo en ratas Wistar macho (n = 6, cada grupo), el tratamiento con diferentes dosis (600, 60 y 6 mg/kg ip) de ELR. Las lesiones gástricas se indujeron mediante la administración de indometacina (30 mg/kg sc). El número de úlceras y signos de puntuación del índice de lesión de las mucosas (IMD) se evaluó teniendo en cuenta el color, edema y hemorragia de las lesiones gástricas, el número de petequias, y el número y tamaño de las úlceras. El análisis estadístico de los datos se realizó mediante ANOVA 1 vía, seguido por el test de Tukey y significación fue de p < 0,05. Resultados: ELR inhiben la ACE (68,5 ± 18,1 %) a una concentración de 100 mg/mL. La administración oral de ELR (6, 60 y 600 mg/kg) mostró un efecto protector gástrico contra inducido por indometacina. Los polifenoles totales de ELR fue 157,7 ± 5,8 mg equivalente de pirogalol/mg de flavonoides y 66,9 ± 3,1 μg equivalentes de quercetina/mg. Conclusiones: L. rigidus protege contra el daño gástrico agudo inducido por la indometacina en una organización independiente de la dosis.
ABSTRACT
Ethanolic extract of Annona muricata L., Annonaceae, leaf (AML) was used to investigate its antinociceptive and anti-ulcerogenic activities and the involvement of the mechanism of ethanolic leaves extract of AML in various animal models. Antinociceptive activity of AML extract was done using acetic acid-induced abdominal writhing in mice, formalin test in rats and hot plate test in mice. Furthermore, the anti-ulcerogenic effect of AML extract was studied in ethanol-induced ulcer model in rats, ethanol-induced gastric lesions in L-NAME-pre-treated rats as well as ethanol-induced gastric lesions in NEM-pre-treated rats test model to determine its mechanism. AML exhibited significant and dose-dependent antinociceptive activity. It also significantly decreased the ulcerative lesion produced by ethanol in rats in a dose-dependent manner. Pre-treatment with N-ethymaleimide, a thiol blocker, including mucosal nonprotein sulfhydryl groups, reduced the anti-ulcerogenic effect of AML extract in the same ulcer model, suggesting that AML extract may have active substances such as tannins, flavanoids and triterpenes that increase the mucosal nonprotein sulfhydryl group content.
ABSTRACT
From Hippophae rhamnoides L.oil free seed, acylated ?-sitosterol ?-D-glucoside was isolated.By alkaline hydrolysis, acylated steryl glucoside yielded ?-sitosterol-?-D-glucoside and fatty acids which were identified as palmitic, stearic, oleic, linoleic, linolenic and decadecylenic acids.These results suggest that acylated steryl glucoside may be esterified forms of ?-sitosterol-?-D-glucoside which was identified by means of physicochemical properties, spectral analysis and synthesis, ?-sitosterol ?-D-glucoside in relatively small doses (i. e. 12mg/kg) was found to be an effective agent in the treatment of acetic acid-induced chronic ulcer in mice.