Gastric Ulcers In Rats Research Articles

Bletilla striata Polysaccharide Nanoparticles Improved the Therapeutic Efficacy of Omeprazole on the Rat Gastric Ulcer Induced by Ethanol.

Gastric ulcers are a common clinical presentation affecting anyone, regardless of their age or gender. Nanoparticles (NPs) containing Bletilla striata polysaccharide (BSP) and omeprazole (OME) were investigated in the study for their therapeutic effect on gastric ulcers. Ethanol-induced gastric ulcers in rats (240 ± 30 g) were established. Our OME-BSP NPs were more stable than free OME in the acidic environment and can increase the absorption of OME in rat stomach, which was confirmed by in situ gastric absorption and distribution experiments. The extended blood circulation of OME-BSP NPs was also observed in rats with gastric ulcer. More importantly, OME-BSP NPs not only decreased the area of gastric ulcer and inhibited gastric acid secretion but also reversed gastric tissue damage and cell apoptosis, as revealed by HE and TUNEL staining. Subsequent SOD, MDA, PGE2, IL-6, and TNF-α tests further verified the superiority of OME-BSP NPs against rat gastric ulcer, which properly originated from superior antioxidant and anti-inflammatory effects. As a result, our OME-BSP NPs' drug delivery system improved the stability and absorption of OME in the rat stomach and achieved targeted treatment of gastric ulcers.

Effect of phylloquinone on indomethacin-induced gastric ulceration in rats: Role of SIRT-1.

Gastric ulcer is the most common gastrointestinal disorder affecting people globally. Although many drugs are available to treat ulcers, the mortality rate is relatively high, and drugs lack selectivity to treat ulcers without causing side effects. In this study, the potential therapeutic effects of phylloquinone were tested against indomethacin-induced gastric ulcer in rats by giving rats a single oral dose of indomethacin (48 mg/kg), followed by phylloquinone (10mg/kg) orally, once daily for six consecutive days. Phylloquinone significantly attenuated indomethacin-induced oxidative and inflammatory responses through hindering the inflammatory cascade by decreasing the levels of TNF-α, NF-κB, INOS and COX-2 which counteracts indomethacin effects. Also, it increased NAD+ which enhanced SIRT-1 level. Furthermore, phylloquinone was effective in increasing mucus secretion, decreasing acid secretion, reversing histological effects caused by indomethacin and minimizing ulcer and lesion indices All these findings indicate that phylloquinone may be used in protection and treatment of indomethacin-induced gastric ulcer.

LC-ESI-MS phenolic contents assessment, antioxidant, and protective ability of Punica granatum root bark extract against ethanol-induced gastric ulcer in rats: in silico H+, K+-ATPase inhibitory pathway study.

The objectives of the current study were to evaluate the Punica granatum root bark extract's (PGE) antioxidant and gastroprotective activities against ethanol-induced gastric ulcers in Wistar rats and to elucidate the putative mechanism of action using in silico analysis. The PGE phytochemical study shows high levels of phenolics, flavonoids, tannins, and polysaccharides. In vitro, the PGE was more effective at scavenging hydroxyl radicals than quercetin and had lower ferric reducing activity than catechin. In vivo, it was revealed that pretreatment of ethanol-ulcerated rats with PGE at oral doses of 100, 200, and 400mg/kg b.w. offered a dose-dependent shield against ethanol-induced ulcers when compared to Omeprazole (20mg/kg b.w.) by preventing the development of deep ulcer lesions, lowering gastric juice output and pH rises, boosting gastric mucus production and antioxidant enzyme levels, and attenuating malondialdehyde and myeloperoxidase contents. Moreover, the liquid chromatography-mass spectrometry analysis of PGE identified 5 phenolic acids and 4 flavonoids, which revealed an in silico high oral bioavailability, drug-likenesses, and good binding affinities and thus inhibitory effects on the gastric H+, K+-ATPase enzyme. PGE may have synergistic antioxidant, anti-inflammatory, and H+, K+-proton pump inhibitory actions that contribute to its antiulcer efficacy.

Apple (Malus domestica Borkh) leaves attenuate indomethacin-induced gastric ulcer in rats

Malus domestica Borkh, the apple tree, exhibited numerous pharmacological properties including antioxidant, neuroprotective, anti-inflammatory, anticancer and antimicrobial activities. The present work aimed to annotate the secondary metabolites from a butanol fraction of apple leaves (BLE), evaluate the gastro-protective and healing effects of this fraction against indomethacin-induced gastric ulcers in rats and to identify its mechanism of action. BLE (100, and 200 mg/kg) was orally administered in rats as an acute treatment against indomethacin-induced gastric ulcer in comparison with famotidine as reference anti-ulcer drug. The stomachs of rats were collected to determine the ulcer index, the preventive ratio, measure the activity of glutathione peroxidase (GPx), and estimate the expression of cyclooxygenase-2 (COX-2), and heat shock protein 70 (HSP70). Furthermore, we evaluated both inflammatory and oxidative stress markers in the gastric tissues. We also performed histopathological study of gastric mucosa using H&E stain and periodic Schiff base stain to evaluate both gastric injury scores and gastric mucus content respectively. Pretreatment with BLE markedly lowered the severity of gastric injury induced by indomethacin, decreased oxidative stress, inflammatory cytokines, and COX-2 expression in the examined gastric tissues. The gastric healing effect of BLE was associated with increased mucoglycoproteins, and HSP70 expression. Additionally, gastric healing effect of high dose of BLE was superior to that of famotidine in decreasing gastric injury scores, COX-2, inflammatory cytokines, lipid peroxidation and in increasing gastric mucin content, HSP70, and reduced glutathione. These findings indicate that BLE is effective in accelerating ulcer healing by boosting HSP70 expression, and decreasing COX-2 expression, oxidative stress, and gastric inflammation which might be related to the presence of 21 phytoconstituents.

Ferulic Acid Treats Gastric Ulcer via Suppressing Oxidative Stress and Inflammation

(1) Background: The aim of the present study was to evaluate the gastroprotective potential of ferulic acid (FA) on indomethacin-induced gastric ulcers in rats with macroscopic and microscopic examinations along with biochemical assays. (2) Methods: After 24 h starvation, the ulcer was induced in male Sprague-Dawley rats by subcutaneous indomethacin (25 mg/kg) injection. Fifteen minutes after ulcer induction, rats were treated with either tween 80 or FA. FA was given by oral gavage at 100 mg/kg, 250 mg/kg, and 500 mg/kg. In the fourth hour, rats were euthanized and collected gastric samples were evaluated macroscopically and microscopically. Antioxidant parameters including malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), and inflammatory parameters comprising of myeloperoxidase (MPO), Tumor Necrosis Factor (TNF)-α, Interleukin (IL)-1β, IL-6 and Nuclear Factor Kappa-B (NF-κB) p65 levels were also determined. (3) Results: Indomethacin injection significantly increased the macroscopic and microscopic scores. In addition, it increased the gastric MDA, MPO, TNF-α, IL-1β, IL-6, and NF-κB p65 levels but reduced SOD and GSH content. Treatment with FA significantly improved the gastric injury macroscopically and microscopically. Moreover, FA displayed a marked decrease in the gastric levels of MDA, MPO, TNF-α, IL-1β, IL-6, and NF-κB p65 and a significant increase in SOD and GSH compared to the INDO group. Ultimately, 250 mg/kg FA was determined as the most effective dose. (4) Conclusion: Our results revealed that FA has a gastroprotective effect against indomethacin-induced gastric ulcers in rats due to its antioxidant and anti-inflammatory properties. As a result, FA may be a potential treatment choice for gastric ulcers.

Piper sarmentosum Roxb. methanolic extract prevents stress-induced gastric ulcer by modulating oxidative stress and inflammation.

This study investigated the gastroprotective effect of Piper sarmentosum (PS) on stress-induced gastric ulcers in rats by measuring its effect on oxidative stress, gastric mucosal nitric oxide (NO), and inflammatory biomarkers. Twenty-eight male Wistar rats were randomly divided into four groups; two control groups (non-stress and stress) and two treated groups supplemented with either methanolic PS extract (500mg/kg body weight) or omeprazole (OMZ; 20mg/kg) orally. After 28days of treatment, the stress control, PS, and OMZ groups were subjected to water-immersion restrain stress (WIRS) for 3.5h. Gastric tissue malondialdehyde (MDA), NO, superoxide dismutase (SOD), inducible NO synthase (iNOS), SOD mRNA, tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 levels were measured. WIRS significantly increased gastric MDA, NO, and pro-inflammatory cytokine levels compared to the non-stressed control group. PS and omeprazole supplementation significantly reduced WIRS-exposure-induced gastric ulcers and MDA, iNOS, and IL-1β levels. However, only PS reduced NO, TNF-α, and IL-6 levels, which were upregulated in this ulcer model. In conclusion, the gastroprotection afforded by PS is possibly mediated by gastric mucosal NO normalization through reduced iNOS expression and attenuation of inflammatory cytokines. PS showed a greater protective effect than omeprazole in reducing gastric lesions and NO, TNF-α, and IL-6 levels, and iNOS expression.

Effect of felodipine on indomethacin-induced gastric ulcers in rats.

Felodipine is a calcium channel blocker with antioxidant and anti-inflammatory properties. Researchers have stated that oxidative stress and inflammation also play a role in the pathophysiology of gastric ulcers caused by nonsteroidal anti-inflammatory drugs. The aim of this study was to investigate the antiulcer effect of felodipine on indomethacin-induced gastric ulcers in Wistar rats and compare it with that of famotidine. The antiulcer activities of felodipine (5 mg/kg) and famotidine were investigated biochemically and macroscopically in animals treated with felodipine (5 mg/kg) and famotidine in combination with indomethacin. The results were compared with those of the healthy control group and the group administered indomethacin alone. It was observed that felodipine suppressed the indomethacin-induced malondialdehyde increase (P<0.001); reduced the decrease in total glutathione amount (P<0.001), reduced the decrease superoxide dismutase (P<0.001), and catalase activities (P<0.001); and significantly inhibited ulcers (P<0.001) at the tested dose compared with indomethacin alone. Felodipine at a dose of 5 mg/kg reduced the indomethacin-induced decrease in cyclooxygenase-1 activity (P<0.001) but did not cause a significant reduction in the decrease in cyclooxygenase-2 activity. The antiulcer efficacy of felodipine was demonstrated in this experimental model. These data suggest that felodipine may be useful in the treatment of nonsteroidal anti-inflammatory drug-induced gastric injury.

Systematic Exploration of the Potential Material Basis and Molecular Mechanism of the Mongolian Medicine Shudage-4 in Attenuating Stress-Induced Gastric Ulcer in Rat.

Shudage-4, an ancient and well-known formula in traditional Mongolian medicine comprising four different types of traditional Chinese medicine, is widely used in the treatment of gastric ulcers. However, the potential material basis and molecular mechanism of Shudage-4 in attenuating stress-induced gastric ulcers remain unclear. This study aimed to first explore the potential material basis and molecular mechanism of Shudage-4 in attenuating gastric ulcers in rats. The chemical constituents and transitional components in the blood of Shudage-4 were identified by ultra-performance liquid chromatography time-of-flight mass spectrometry (UPLC-TOF-MS). The rat gastric ulcer model was induced by water immersion restraint stress (WIRS). The ulcer damage to gastric tissue was measured at the gross anatomical level and pathological level by hematoxylin-eosin (HE) staining of gastric tissue. RNA sequencing of gastric tissue and plasma metabolomics were performed to analyze the mechanism of Shudage-4 against gastric ulcers. A Pearson correlation analysis was performed to explore the association between serum metabolites and gene expression of gastric tissue. A total of 30 chemical constituents were identified in Shudage-4 by UPLC-TOF-MS. Among 30 constituents, 13 transitional components in the blood were considered as the potential material basis. Shudage-4 treatment had a significant effect on WIRS-induced gastric ulcers in rats. HE staining of gastric tissue illustrated that WIRS-induced ulcer damage was suppressed by Shudage-4 treatment. RNA sequencing of gastric tissue showed that 282 reversed expression genes in gastric tissue were related to Shudage-4 treatment, and gene set enrichment analysis revealed that Shudage-4 treatment significantly inhibited gene set expression related to reactive oxygen species (ROS), which was also validated by detecting rat gastric tissue MDA, GSH, SOD, GSH-Px, and CAT activities. The plasma metabolomic data demonstrated that 23 significantly differential metabolites were closely associated with the Shudage-4 treatment. The further multiomics joint analysis found that significantly upregulated 5 plasma metabolites in Shudage-4-treated rats compared to model rats were negatively correlated with gene set expression related to ROS in gastric tissue. Shudage-4 alleviated WIRS-induced gastric ulcers by inhibiting ROS generation, which was achieved by regulating plasma metabolites level.

Gastroprotective effect of zafirlukast against indomethacin induced gastric ulcer in rats via PGE2 and anti-inflammatory pathways.

To evaluate the gastroprotective potential of zafirlukast against indomethacin-induced gastric ulcers in rats. Thirty-two male Wistar rats were included in this study and randomly divided into 4 equal groups (n=8); control (normal) group, indomethacin group, Ranitidine group, and Zafirlukast group. Indomethacin was given as a single oral dose of (20 mg/kg) for the induction of ulcers. Both ranitidine (50 mg/kg) and zafirlukast (20 mg/ kg) were given orally for seven days after inducing the ulcer. All animals were sacrificed by an overdose of anesthesia at the end of the experimental period and their gastric tissues have been collected for histopathological and biological assay. Levels of prostaglandin E2 (PGE2), thiobarbituric acid reactive substances (TBARS), and interleukin 1β (IL-1β ) were measured as well as a histopathological study to evaluate the effect of zafirlukast on gastric tissues. Significant abnormalities were found in both the histological and biochemical parameters of the indomethacin group reflecting the changes seen with gastric ulcers. Significant improvement was found in the Zafirlukast group as reflected by the morphological improvement seen in the gastric tissues. An effect that was associated with an increase in the PGE2 levels along with reductions in IL-1β expression and TBARS concentrations. As per the results of this study, zafirlukast shows promising gastroprotective properties possibly through enhancement of PGE2 levels as well as having anti-inflammatory and anti-oxidant properties.

In silico molecular docking study and Protective effect of Piper attenuatum on aspirin induced gastric ulcer in rats

Steroid and painkiller abuse induced peptic ulcer disease, which causes abdominal pain, fullness, heartburn, and nausea. Medicinal plants have treated ulcers for centuries. We used Piper attenuatum ethanolic plant extracts for aspirin to induce ulcers in Wistar rats to test the leaf ethanolic extract's antiulcer properties. The control group is normal saline, the standard group is ranitidine (20 mg/kg), and the extract-treated groups are 100 mg/kg and 200 mg/kg ethanolic plant extracts. Ulcer Score, gastric juice volume, free and total acidity, ulcer index, ulcer protection, and pH were measured. The ulcer score was determined via rat stomach biopsies. Plant ethanolic extracts are gastroprotective. Only pH increased compared to the control group. Piper attenuatum ethanolic extract is the most gastroprotective at 200 mg/kg. Extracts were phytochemically and analytically assessed. Phytochemical screening demonstrates that plant extracts contain alkaloids, amides, glucose, proteins, glycosides, steroids, flavonoids, etc. This research suggests that phytoconstituents may have anti-ulcer potential, although structural elucidation of bioactive chemicals is needed. Molecular docking showed better binding affinity versus the 3D structure of pig gastric H+/K+ ATPase isoforms phytoconstituents Cepharadione A, Cepharadione B, Guineensine, Norcepharadione B, and Piperlonguminine. With these significant results, it may be a drug in the future.

The Potential Antistress and Gastroprotective Effects of Berberine in Immobilization Stress Induced Gastric Ulcer in Rats

The Potential Antistress and Gastroprotective Effects of Berberine in Immobilization Stress Induced Gastric Ulcer in Rats

Acacetin Ameliorates Acetylsalicylic Acid-Induced Gastric Ulcer in Rats by Interfering with Oxidative Stress, Inflammation, and Apoptosis

Acacetin Ameliorates Acetylsalicylic Acid-Induced Gastric Ulcer in Rats by Interfering with Oxidative Stress, Inflammation, and Apoptosis

Gastroprotective effects of ginsenoside Rh4 against ethanol-induced gastric mucosal injury by inhibiting the MAPK/NF-κB signaling pathway.

Ginsenoside Rh4, a bioactive component extracted from Panax ginseng, exhibits various pharmacological activities, such as anti-inflammatory, anti-oxidation, anti-diabetes, anti-obesity, antitumor and immunity enhancement. However, the gastroprotective effect of ginsenoside Rh4 remains unknown. The present study evaluated the gastroprotective effect and potential mechanism of ginsenoside Rh4 in an ethanol-induced gastric ulcer model. Ginsenoside Rh4 (15, 30, and 60 mg kg-1) and omeprazole (30 mg kg-1) were administered orally for 7 days. The results showed that pretreatment with ginsenoside Rh4 reduced the gastric injury area and percentage of mucosal lesions in gastric tissue. Besides, treatment with ginsenoside Rh4 increased superoxide dismutase (SOD) activity, glutathione (GSH) and nitric oxide (NO) levels, reduced the content of malonaldehyde (MDA), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1β (IL-1β), mediated the prostaglandin E-2-cyclooxygenase-2 (PGE2-Cox-2) pathway, and mitigated inflammation and oxidative stress via blockade of proinflammatory mitogen-activated protein kinase-nuclear factor κB (MAPK/NF-κB) signaling pathways. Furthermore, ginsenoside Rh4 significantly enhanced the protein expression of B-cell lymphoma gene 2 (Bcl-2), decreased the protein expression of Bcl-2-associated X protein (Bax) and tumor necrosis factor receptor superfamily member 6 (Fas), and inhibited the number of apoptotic cells in gastric tissues. The present work demonstrated that ginsenoside Rh4 exerted a considerable gastroprotective effect against ethanol-induced gastric ulcers in rats.

Retracted: Analysis of the Effect of Sichs on Gastric Ulcer Rats Based on RNA Sequencing Technique.

[This retracts the article DOI: 10.1155/2022/9325836.].

Evaluation of gastroprotective and phytochemical properties of Terminalia superba engl. &amp; diels (combretaceae) stem bark methanol extract

ABSTRACT Peptic ulcer is a disease that is affecting a large part of the population world-wide irrespective of the race and tribe. Advances made in the search for an ideal or perfect antiulcer drug has been eroded by cost, side effects and treatment failure. Search for cheap, safe, and effective drugs continues. It is the aim of the research to identify the secondary metabolites present in Terminalia superba Engl. &amp; Diels (Combretaceae) stem bark methanol extract and investigate its gastroprotective properties. Methanol extract of T. superba was prepared by cold maceration extraction method using methanol. The extract was concentrated and subjected to acute toxicity test using Lorke’s method, and phytochemical investigation using standard methods. Gastro-protective activity was investigated by three models: aspirin- induced gastric ulcer, hypothermic restraint stress-induced ulcers and ethanol-induced gastric ulcer. The extract was safe in mice at doses below 2154 mg per Kg body weight and the extract contained the major secondary metabolites-alkaloids, flavonoids tannins, saponins, terpenoids, steroids. Pre-treatment with the extract reduced gastric ulceration in rats. There was a 77.3% reduction in the aspirin model, 75.2 % in the ethanol model and an 84 % in the Hypothermic restraint stress-induced ulcers model. There was a statistically significant difference at p= .05 between the treated groups and the un-treated group The methanol extract of Terminalia superba bark is rich in the major secondary metabolites and has gastro-protective a property.

Gastric protective effect of Alpinia officinarum flavonoids: mediating TLR4/NF-κB and TRPV1 signalling pathways and gastric mucosal healing

Context Our previous studies have found that total flavonoid of Alpinia officinarum Hance (Zingiberaceae) (F.AOH) had protective effects on gastric ulcer (GU). Objective To investigate the protective mechanism of F.AOH on acetic acid-induced chronic GUs in rats and ethanol-induced GES-1 cells damage. Materials and methods In vivo: Gastric damage was induced in SD rats by administering acetic acid after oral treatment with F-AOH at 54, 27 and 13.5 mg/kg (2 weeks of continuous gavage). After a comprehensive evaluation of rats’ serum and gastric tissue-related indicators, gene transcriptome sequencing, qPCR and Western blotting were used to investigate the mechanism further. In vivo: GES-1 cells were incubated with F-AOH (8, 4 and 2 μg/mL) for 16 h and treated with 7% ethanol for 4 h. Transwell and flow cytometry were employed to detect migration and apoptosis of cells. Results F.AOH effectively reduced the area of GUs in rats (from 11.2 ± 1.89 to 2.19 ± 0.95), reversing ethanol-induced cells apoptosis (from 23 ± 1.3 to 8.11 ± 0.93%). It also inhibited the expression of endothelin-1 (ET-1) and iNOS proteins, decreasing the levels of TNF-α IL-6 in serum, improving oxidative stress levels and increasing the expression of Bcl-2/Bax dimer genes. In addition, 4005 differentially expressed genes between the acetic acid model and the drug groups. Through experimental verification, F.AOH can inhibit the activation of TLR4/NF-κB signalling pathway and TRPV1 receptor. Conclusions F.AOH, as an effective gastric protective plant component, had potential therapeutic value in anti-inflammatory pain and antioxidative stress gastrointestinal diseases.

New bioisosteric derivative of diclofenac sodium resolute gastric ulcer in rats through regulation of pro-inflammatory cytokines “Tumor necrosis factor alpha and Inter-leukin-1”

Background and objective: Gastric ulcer is an important health risk for a human. It is a painful sore in the stomach lining. It is relatively easy to cure, but can cause significant problems if left un-treated. Non-steroidal anti-inflammatory drugs (NSAIDs) are prescribed for millions of people worldwide; however, as their consequences most of individuals suffer from gastric ulcers and related complications. Diclofenac sodium is a medication from NSAIDs class of drugs, is used to relieve joint pain from arthritis but when used chronically, it may cause bleeding and ulcers in the stomach or intestine. This study aimed to test the safety and the antiulcer activity of a new bioisosteric derivative of diclofenac sodium on a rat model. Methods: 2-Cumaranone 1 had been utilized to prepare the propanamides 2a-e then after the bioisosteric diaryl ethers 3a-e synthesized; then its purity was characterized on the basis of IR, 1HNMR and Mass spectral data. Acute toxicity on albino mice was performed to ensure the safety and an experimental rat model was used to evaluate the anti-ulcer activity. Kidney and liver functions tests were measured, ulcer measurements were reported and pro-inflammatory cytokines tumor necrosis factor alpha (TNFα) and Interleukin 1 beta (IL-1β) levels were tested. Results: Unlike diclofenac sodium, the bioisosteric diaryl ethers 3a-e is less acidic and produces less damage to the stomach wall. In addition, the structure of amide derivative is also bulky thus it is more selective to cyclooxygenase ΙΙ enzyme thus the risk of gastric ulcer was less than with diclofenac sodium itself. Conclusion: Unlike diclofenac, amide derivative of diclofenac is less acidic than diclofenac thus it produces less damage to the stomach wall.

Gastroprotective effects of Combretum paniculatum (Combretaceae) leaf extract and fractions on absolute ethanol-induced gastric ulcer in rats

BackgroundCombretum paniculatum (Combretaceae) Vent. is commonly used in traditional medicine to treat ulcers and gastrointestinal disorders, including distended spleens and the liver. This study investigated the gastroprotective effects of C. paniculatum leaf extract and its fractions on absolute ethanol-induced gastric ulcers in rats and explored their effects on endogenous antioxidant (SOD, MDA, GSH, and Catalase) levels. Butanol, n-hexane, and ethyl acetate extracts (100 and 200 mg/kg), omeprazole (20 mg/kg), and control (3% Tween 80) were administered orally.ResultsThe methanolic extract and fractions of C. paniculatum exhibited varying degrees of ulcer protection. MECP exhibited significant (P < 0.05) ulcer protection (55.56%) at 200 mg/kg; at 100 and 200 mg/kg, HFCP induced considerable (P < 0.01 & 0.001) ulcer reduction (64.44% and 80.00%), respectively; EAFCP offered substantial (P < 0.05) ulcer reduction (57.78%) at 200 mg/kg, whereas BFCP produced significant (P < 0.01) ulcer protection (73.33% and 68.89%) at 100 and 200 mg/kg against absolute ethanol-induced ulcer. MDA levels were substantially reduced after pretreatment with the extract and fractions, whereas SOD, GSH, and catalase levels were significantly enhanced.ConclusionThese findings suggest that C. paniculatum leaf extract and fractions possess gastroprotective actions against ethanol-induced ulcers and exert these effects through antioxidant mechanisms. Therefore, the traditional use of C. paniculatum leaves in the treatment of ulcers is justified.

Aqueous suspension of anise exerted an additive gastroprotective effect to misoprostol against indomethacin-induced gastric ulcers in rats

Aqueous suspension of anise exerted an additive gastroprotective effect to misoprostol against indomethacin-induced gastric ulcers in rats

Evaluation of Vernonia amygdalina Leaves for Gastroprotective Activity on Experimental Models of Gastric Ulcer in Rats

Background: Vernonia amygdalina del. (Arecaceae) leaf, popularly known as ‘Bitter leaf’ is widely used as a leafy vegetable in soups and in folkloric medicine against many ailments including stomach discomfort.&#x0D; Aim: The current study aimed to assess the gastroprotective effect of the crude aqueous extract of V. amygdalina leaves (AEVAL) on Hydrochloric acid (HCl)/Ethanol gastric ulcer models.&#x0D; Study Design: An animal experimental study which was conducted for 14 days.&#x0D; Place and Duration of Study: Department of Medical Laboratory Sciences, and Animal House, College of Medicine, University of Nigeria, Enugu Campus, between May 2013 and August 2014.&#x0D; Methodology: Preliminary acute toxicity testing was performed. Twenty (25) rats were divided into five groups (n=5). Groups I and II were normal and ulcer control groups respectively. Groups III, IV and V were pretreated with cimetidine (100 mg/kg), 250 mg/kg AEVAL and 500 mg/kg AEVAL respectively. Cimetidine and AEVAL were administered intraperitoneally and orally, respectively, once daily for 7days. After drug treatments on Day 7, gastric ulcers were induced using HCl/ethanol solution (1ml/rat) prior to sacrifice. Ulcer indices and percentage ulcer inhibition were determined. The stomach tissues were excised, histologically processed and evaluated for histopathological alteration under light microscopy.&#x0D; Results: Acute toxicity testing revealed that AEVAL at a dose of 5000 mg/kg body weight did not cause any mortality. Macroscopical evaluation of the gastric mucosa revealed severe lesions following induction with HCl/ethanol. However, profound protective effects were observed with cimetidine and AEVAL (250 and 500 mg/kg) pretreatments with ulcer inhibition of 79%, 58% and 76% respectively. Histopathological findings were consistent with the macroscopical features observed.&#x0D; Conclusion: Data from this study suggest that oral treatment with V. amygdalina leaves extract exhibited gastroprotective activities against the injurious effects of acidified ethanol on the gastric mucosa of albino rats.