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Gastroprotective Effect of Myricetin on Ethanol-Induced Acute Gastric Injury in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9968112. [PMID: 34630623 PMCID: PMC8497113 DOI: 10.1155/2021/9968112] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 01/10/2023]
Abstract
The flavonoid myricetin is abundant in vegetables and has various bioactive properties, including anti-inflammatory and antioxidative activities. In the present study, we explored the effects of myricetin on alcohol-induced gastric ulcer in a rat model. To induce gastric ulcer, absolute ethanol (5 mL/kg body weight) was orally administrated to each rat. The positive control and myricetin-treated groups were given oral doses of omeprazole (20 mg/kg) or myricetin (12 mg/kg), respectively, 1 hour prior to the administration of absolute alcohol. We found that pretreatment with myricetin significantly decreased alcohol-induced gastric ulcer, hemorrhage, hyperemia, and epithelial cell loss in the gastric mucosa. Myricetin pretreatment reduced the level of malondialdehyde (MDA) and increased that of total glutathione (GSSG/GSH) and superoxide dismutase (SOD) in gastric tissues. In addition, it elevated the expression levels of cyclooxygenase-1 (COX-1) and prostaglandin E2 (PGE2) and decreased the phosphorylation of nuclear factor kappa B (NF-κB). Together, these results indicate that myricetin effectively inhibits ethanol-induced acute gastric injury by preventing oxidative damage, stimulating PGE2 production, and inhibiting NF-κB activation. We suggest that myricetin may be an alternative treatment for gastric injury caused by alcohol intake.
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Ohara R, Périco LL, Rodrigues VP, Bueno G, Zanatta AC, Campaner Dos Santos L, Vilegas W, Constatino FB, Justulin LA, Hiruma-Lima CA. Terminalia catappa L. infusion accelerates the healing process of gastric ischemia-reperfusion injury in rats. JOURNAL OF ETHNOPHARMACOLOGY 2020; 256:112793. [PMID: 32240780 DOI: 10.1016/j.jep.2020.112793] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/18/2020] [Accepted: 03/22/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Terminalia catappa L. (Combretaceae), known as "amendoeira da praia" in Brazil, has been recognized as a medicinal plant in folk medicine for the treatment of gastrointestinal disorders and other inflammatory conditions. The present study aimed to investigate the preventive and healing effects of the infusion of leaves of T. catappa (ILTC) against gastric lesions caused by ischemia and reperfusion (I/R) injury and characterize its mechanism of action in the gastric mucosa of rats. MATERIALS AND METHODS Different doses (30, 100, and 300 mg/kg) of ILTC were orally administered as acute and subacute treatments against I/R-induced gastric lesion in rats. After treatment, the stomach of rats was collected to measure the lesion area, redox parameters malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and reduced glutathione (GSH) and inflammatory parameters myeloperoxidase activity (MPO), interleukin 1β (IL-1β) and tumor necrosis factor α (TNF-α). The activities of matrix metalloproteinases 2 and 9 (MMPs 2 and 9) were assessed by zymography method to clarify the mechanisms of the healing acceleration promoted by ILTC. RESULTS Pretreatment with ILTC (100 mg/kg) was effective in preventing the aggravation of lesions in the acute model by reducing MPO activity by 38% relative to control group, despite the lack of clarity of this action at the macroscopical level at the lesion area (p < 0.05). After three days of treatment with ILTC (30 and 100 mg/kg), this infusion significantly reduced the lesion area by 95% and 89%, respectively, compared the control (p < 0.05). The gastric healing effect of all doses of ILTC was followed by a reduction in MPO activity (decrease by 70-78%). Compared to the negative control, an improvement in gastric healing owing to treatment with ILTC was observed and this was followed by an increase in MMP-2 (20-47%) (p < 0.05). CONCLUSION Three days of treatment with ILTC could accelerate the healing process in I/R-induced lesions in rats. By decreasing MPO levels, ILTC enabled the action of MMP-2, which led to tissue recovery in the gastric mucosa.
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Affiliation(s)
- Rie Ohara
- Department of Physiology, Biosciences Institute, UNESP-São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil
| | - Larissa Lucena Périco
- Department of Physiology, Biosciences Institute, UNESP-São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil; Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Vinicius Peixoto Rodrigues
- Department of Physiology, Biosciences Institute, UNESP-São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil
| | - Gabriela Bueno
- Department of Physiology, Biosciences Institute, UNESP-São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil
| | - Ana Caroline Zanatta
- Biosciences Institute, UNESP-São Paulo State University, CEP 11330-900, São Vicente, São Paulo, Brazil; Institute of Chemistry, UNESP-São Paulo State University, CEP 14800-900, Araraquara, São Paulo, Brazil
| | | | - Wagner Vilegas
- Biosciences Institute, UNESP-São Paulo State University, CEP 11330-900, São Vicente, São Paulo, Brazil
| | - Flavia Bessi Constatino
- Laboratory of Extracellular Matrix, UNESP- São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil
| | - Luis Antonio Justulin
- Laboratory of Extracellular Matrix, UNESP- São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil
| | - Clélia Akiko Hiruma-Lima
- Department of Physiology, Biosciences Institute, UNESP-São Paulo State University, CEP 18618-689, Botucatu, São Paulo, Brazil.
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Prieto-Moure B, Cejalvo-Lapeña D, Belda-Antolí M, Padrón-Sanz C, Lloris-Cejalvo JM, Lloris-Carsí JM. Combination Therapy of Allopurinol and Dantrolene and Its Role In The Prevention of Experimental Ischemia Reperfusion Injury Of The Small Intestine. J INVEST SURG 2020; 34:800-807. [PMID: 31906750 DOI: 10.1080/08941939.2019.1696904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND The effect of different drugs on ischemia and reperfusion (I/R; induced oxygen free radical damage) was examined in small bowel tissue because the intestine is extremely sensitive to this pathology. Different drugs (allopurinol and dantrolene) can remove oxygen free radicals or inhibit the mechanisms leading to their generation, thus reducing mucosal lesions. We investigated the protective potential of combination therapy in the intestine against I/R damage. METHODS Forty-eight male Wistar rats were separated into 8 groups: one sham (control), one I/R (ischemia 60 min + reperfusion at 24 h), and 6 groups treated with allopurinol, dantrolene, or combination therapy. The grade of injury in the small bowel was established by the lipid peroxidation (MDA) and antioxidant enzymatic activity of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) in tissue samples. Moreover, the collected samples were subjected to histological study. RESULTS Combination therapy preserved normal enzymatic levels compared to the I/R groups (p < 0.05) for all parameters studied. The animals treated with combination therapy showed less severe small bowel damage than I/R group in accordance with the histological results. CONCLUSIONS Results obtained in the experimental process indicate that the administration of antioxidants protects against intestinal damage by I/R. Overall, combination therapy may protect intestinal tissue from I/R injury.
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Affiliation(s)
- Beatriz Prieto-Moure
- Department of Biomedical Sciences, European University of Valencia, Valencia, Spain
| | - Dolores Cejalvo-Lapeña
- Research Group "Identification Therapeutic and Experimental Evaluation of Natural Products Bioprotectors," Faculty of Medicine and Experimental, Catholic University of Valencia, Valencia, Spain
| | - Mariola Belda-Antolí
- Research Group "Identification Therapeutic and Experimental Evaluation of Natural Products Bioprotectors," Faculty of Medicine and Experimental, Catholic University of Valencia, Valencia, Spain
| | - Carolina Padrón-Sanz
- Research Group "Identification Therapeutic and Experimental Evaluation of Natural Products Bioprotectors," Faculty of Medicine and Experimental, Catholic University of Valencia, Valencia, Spain
| | - José Miguel Lloris-Cejalvo
- Research Group "Identification Therapeutic and Experimental Evaluation of Natural Products Bioprotectors," Faculty of Medicine and Experimental, Catholic University of Valencia, Valencia, Spain
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de Souza Mesquita LM, Rodrigues CFB, da Rocha CQ, Bianchim MS, Rodrigues CM, de Oliveira VM, Gaeta HH, Belchor MN, Toyama MH, Vilegas W. LC-ESI-IT-MS/MS and MALDI-TOF Approach: Identification of Natural Polymers from Rhizophora mangle Barks and Determination of Their Analgesic and Anti-inflammatory Properties. NATURAL PRODUCTS AND BIOPROSPECTING 2019; 9:23-34. [PMID: 30430388 PMCID: PMC6328426 DOI: 10.1007/s13659-018-0192-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 10/31/2018] [Indexed: 05/03/2023]
Abstract
We recognize the chemical composition of the acetonic extract of Rhizophora mangle barks (AERM) using mass spectrometry analysis [liquid chromatography (LC)-ESI-IT-MS/MS and matrix-assisted laser desorption/ionization-time of flight-MS (MALDI-TOF)]. Analgesic activity was evaluated by formalin and tail-flick experimental assays. Anti-inflammatory activity was performed by paw edema test induced by carrageenan and 48/80 compounds. The first series of experiments involved [LC]-FIA-IT-MS/MS with 11 separated catechins derivatives until degree of polymerization 3 (DP3). The spectra obtained by MALDI-TOF analysis of the AERM presented two homologous series: one based on polymers of m/z 288 Da increments (up to DP12) and another series based on polymers of m/z [288 + 162] Da increments (up to DP11). In addition to these series of flavan-3-ol, each DP had a subset of masses with a variation of - 16 Da (homologous series of afzelechins-m/z 873-3465 Da) and + 16 Da (homologous series of gallocatechins-m/z 905-3497 Da). A similar pattern with homologous series of gallocatechins and afzelechins could also be observed for a fifth and a sixth monohexoside series: glucogallocatechins (m/z 779-3371) and glucoafzelechins (m/z 747-3339). The intraperitoneal administration of different doses of AERM (50, 150 and 300 µg mL-1) have a morphine-like effect and intense anti-inflammatory activity.
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Affiliation(s)
- Leonardo Mendes de Souza Mesquita
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Caroline Fabri Bittencourt Rodrigues
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Cláudia Quintino da Rocha
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
- Laboratório de Estudos Avançados em Fitomedicamentos (LEAF), UFMA - Federal University of Maranhão, Av. dos Portugueses, 1966 - Bacanga, São Luís, Maranhão, CEP: 65080-805, Brazil
| | - Mayara Silveira Bianchim
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Clenilson Martins Rodrigues
- Embrapa Agroenergy, Brazilian Agricultural Research Corporation, W3 Norte, PqEB, Brasília, DF, 70770-901, Brazil
| | - Vanda Maria de Oliveira
- Embrapa Agroenergy, Brazilian Agricultural Research Corporation, W3 Norte, PqEB, Brasília, DF, 70770-901, Brazil
| | - Henrique Hessel Gaeta
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Mariana Novo Belchor
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Marcos Hikari Toyama
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil
| | - Wagner Vilegas
- Laboratory of Bioprospection of Natural Products (LBPN), UNESP - São Paulo State University/Coastal Campus of São Vicente, Pça Infante Dom Henrique S/N, São Vicente, São Paulo, CEP: 11330-900, Brazil.
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Modulatory Effect of Polyphenolic Compounds from the Mangrove Tree Rhizophora mangle L. on Non-Alcoholic Fatty Liver Disease and Insulin Resistance in High-Fat Diet Obese Mice. Molecules 2018; 23:molecules23092114. [PMID: 30135414 PMCID: PMC6225131 DOI: 10.3390/molecules23092114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/05/2018] [Accepted: 08/11/2018] [Indexed: 12/12/2022] Open
Abstract
No scientific report proves the action of the phytochemicals from the mangrove tree Rhizophora mangle in the treatment of diabetes. The aim of this work is to evaluate the effects of the acetonic extract of R. mangle barks (AERM) on type 2 diabetes. The main chemical constituents of the extract were analyzed by high-performance liquid chromatography (HPLC) and flow injection analysis electrospray-iontrap mass spectrometry (FIA-ESI-IT-MS/MS). High-fat diet (HFD)-fed mice were used as model of type 2 diabetes associated with obesity. After 4 weeks of AERM 5 or 50 mg/kg/day orally, glucose homeostasis was evaluated by insulin tolerance test (kiTT). Hepatic steatosis, triglycerides and gene expression were also evaluated. AERM consists of catechin, quercetin and chlorogenic acids derivatives. These metabolites have nutritional importance, obese mice treated with AERM (50 mg/kg) presented improvements in insulin resistance resulting in hepatic steatosis reductions associated with a strong inhibition of hepatic mRNA levels of CD36. The beneficial effects of AERM in an obesity model could be associated with its inhibitory α-amylase activity detected in vitro. Rhizophora mangle partially reverses insulin resistance and hepatic steatosis associated with obesity, supporting previous claims in traditional knowledge.
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Mendes RJDA, Pereira Filho AA, Nogueira ADJL, Araújo KRF, França CRC, Carvalho IBD, Silva NMLD, Azevedo AS, Rosa IG. Evaluation of molluscicidal activity of three mangrove species (Avicennia schaueriana, Laguncularia racemosa and Rhizophora mangle) and their effects on the bioactivity of Biomphalaria glabrata Say, 1818. Rev Inst Med Trop Sao Paulo 2018; 60:e7. [PMID: 29451595 PMCID: PMC5813670 DOI: 10.1590/s1678-9946201860007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 12/01/2017] [Indexed: 11/22/2022] Open
Abstract
Schistosomiasis is a disease of global extent reaching populations in social vulnerability. One of the control measures of this parasitosis is the use of molluscicidal substances that can fight snails of the genus Biomphalaria, intermediate hosts of Schistosoma mansoni. The aim of this work was to study the toxic activity of three mangrove species (Avicennia schaueriana Stapf. & Leech, ex Moldenke, 1939, Laguncularia racemosa (L.) CF Gaertn, 1807 and Rhizophora mangle L. 1753) on the biological activities of snails Biomphalaria glabrata. Hydroalcoholic extracts were prepared from the stem and leaves of each of the three plant species to which mollusks were exposed. The phytochemical analysis of plants showed the presence of important metabolites in the leaves and stems of L. racemosa and R. mangle, such as tannins and saponins, but the absence of these metabolites in A. schaueriana. Leaf and stem extracts of the three plant species showed low molluscicidal activity, not reaching the standards determined by the World Health Organization (WHO, 1983). L. racemosa and R. mangle has interfered with motility, feeding and oviposition of snails, unlike the extracts of A. schaueriana, which had no effect on these activities.
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Affiliation(s)
- Renato Juvino de Aragão Mendes
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Adalberto Alves Pereira Filho
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Horizonte, Minas Gerais, Brazil
| | - Aline de Jesus Lustosa Nogueira
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Karla Regina Freitas Araújo
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Clícia Rosane Costa França
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Iramar Borba de Carvalho
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Natale Maria Lindoso da Silva
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Alexandre Santana Azevedo
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
| | - Ivone Garros Rosa
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, São Luís, Maranhão, Brazil
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Saiah W, Halzoune H, Djaziri R, Tabani K, Koceir EA, Omari N. Antioxidant and gastroprotective actions of butanol fraction ofZingiber officinaleagainst diclofenac sodium-induced gastric damage in rats. J Food Biochem 2017. [DOI: 10.1111/jfbc.12456] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wassila Saiah
- Bioenergetics and Intermediary Metabolism Laboratory, Biology and Organisms Physiology Department; University of Sciences and Technology Houari Boumediene; Bab Ezzouar Algeria
| | - Hanane Halzoune
- Bioenergetics and Intermediary Metabolism Laboratory, Biology and Organisms Physiology Department; University of Sciences and Technology Houari Boumediene; Bab Ezzouar Algeria
| | - Rabah Djaziri
- Laboratory Antifungal, Antibiotic, Physico-Chemical, Synthesis and Biological Activity, Department of Biology; Faculty of Natural Sciences and Life Sciences of the Earth and the Universe, University Abou Bekr Belkaid Tlemcen; Tlemcen Algeria
| | - Khadidja Tabani
- Bioenergetics and Intermediary Metabolism Laboratory, Biology and Organisms Physiology Department; University of Sciences and Technology Houari Boumediene; Bab Ezzouar Algeria
| | - Elhadj Ahmed Koceir
- Bioenergetics and Intermediary Metabolism Laboratory, Biology and Organisms Physiology Department; University of Sciences and Technology Houari Boumediene; Bab Ezzouar Algeria
| | - Naima Omari
- Bioenergetics and Intermediary Metabolism Laboratory, Biology and Organisms Physiology Department; University of Sciences and Technology Houari Boumediene; Bab Ezzouar Algeria
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Belda-Antolí M, Padrón-Sanz C, Cejalvo-Lapeña D, Prieto-Moure B, Lloris-Cejalvo JM, Lloris-Carsí JM. Antioxidant potential of Himanthalia elongata for protection against ischemia-reperfusion injury in the small bowel. Surgery 2017; 162:577-585. [PMID: 28666685 DOI: 10.1016/j.surg.2017.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 04/10/2017] [Accepted: 04/28/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Seaweed has been associated with the prevention and/or treatment of various diseases related to oxidative stress because of its antioxidant activity. We investigated the protective potential of extract of Himanthalia elongata against ischemia-reperfusion (I/R) injury in the intestine of rats. METHODS Seventy-two (72) male Wistar albino rats were randomly assigned into 12 groups as follows: sham, I/R only, I/R plus vehicle at 3 time points, and I/R plus extract at 3 time points. The degree of intestinal injury was determined by oxidative stress using lipid peroxidation, superoxide dismutase, catalase, and glutathione peroxidase after mesenteric ischemia-reperfusion. A histological study was also performed. RESULTS The algae extract helps to maintain normal enzymatic levels because, for all the studied parameters, groups treated with the extract showed significant differences (P < .05) compared with the I/R groups, and there were no differences compared with the sham group. The histological study showed that damage to the intestinal mucosa was less severe in animals treated with extract of H elongata after up to 24 hours of reperfusion compared with the I/R group. CONCLUSION These results suggest that the extract of H elongata can protect intestinal tissue against ischemia-reperfusion injury.
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da Rocha CQ, de-Faria FM, Marcourt L, Ebrahimi SN, Kitano BT, Ghilardi AF, Luiz Ferreira A, de Almeida ACA, Dunder RJ, Souza-Brito ARM, Hamburger M, Vilegas W, Queiroz EF, Wolfender JL. Gastroprotective effects of hydroethanolic root extract of Arrabidaea brachypoda: Evidences of cytoprotection and isolation of unusual glycosylated polyphenols. PHYTOCHEMISTRY 2017; 135:93-105. [PMID: 28010885 DOI: 10.1016/j.phytochem.2016.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/23/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
The hydroethanolic root extract of Arrabidaea brachypoda, from Bignoniaceae family, a Brazilian medicinal plant, demonstrated significant in vivo gastroprotective effects using different in vivo assays. The activity was evaluated in several models of experimental gastric ulcer in rats (absolute ethanol, glutathione depletion, nitric oxide depletion, non-steroidal anti-inflammatory drugs, pylorus ligation and acetic acid). Using 300 mg/kg (p.o.) the extract significantly reduced gastric injury in all models. In depth phytochemical investigation of this extract led to the isolation of two previously undescribed phenylethanoid glycosides derivatives and seven unusual glycosylated dimeric flavonoids. The structures were elucidated using UV, NMR and HRMS analysis. Absolute configuration of the dimeric flavonoids was performed by electronic circular dichroism (ECD) spectroscopy.
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Affiliation(s)
- Claudia Quintino da Rocha
- Institute of Biosciences, Coastal Campus of São Vicente, Universidade Estadual Paulista-UNESP, 11330-900, São Vicente, SP, Brazil; School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Centre Medical Universitaire-CMU, Rue Michel-Servet 1, CH-1211, Geneva 4, Switzerland
| | - Felipe Meira de-Faria
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil; Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Laurence Marcourt
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Centre Medical Universitaire-CMU, Rue Michel-Servet 1, CH-1211, Geneva 4, Switzerland
| | - Samad Nejad Ebrahimi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G. C., Evin, Tehran, Iran
| | - Bruna Tiemi Kitano
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Amanda Franceschini Ghilardi
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Anderson Luiz Ferreira
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil; Nucleus of Biological Sciences, Institute of Biotechnology, Federal University of Goias, 75704-020, Catalão, GO, Brazil
| | - Ana Cristina Alves de Almeida
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Ricardo José Dunder
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Alba Regina Monteiro Souza-Brito
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil; Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
| | - Matthias Hamburger
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
| | - Wagner Vilegas
- Institute of Biosciences, Coastal Campus of São Vicente, Universidade Estadual Paulista-UNESP, 11330-900, São Vicente, SP, Brazil.
| | - Emerson Ferreira Queiroz
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Centre Medical Universitaire-CMU, Rue Michel-Servet 1, CH-1211, Geneva 4, Switzerland.
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Centre Medical Universitaire-CMU, Rue Michel-Servet 1, CH-1211, Geneva 4, Switzerland
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Semipurified Ethyl Acetate Partition of Methanolic Extract of Melastoma malabathricum Leaves Exerts Gastroprotective Activity Partly via Its Antioxidant-Antisecretory-Anti-Inflammatory Action and Synergistic Action of Several Flavonoid-Based Compounds. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:6542631. [PMID: 28168011 PMCID: PMC5267083 DOI: 10.1155/2017/6542631] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/26/2016] [Indexed: 12/15/2022]
Abstract
Recent study has demonstrated the gastroprotective activity of crude methanolic extract of M. malabathricum leaves. The present study evaluated the gastroprotective potential of semipurified extracts (partitions): petroleum ether, ethyl acetate (EAMM), and aqueous obtained from the methanolic extract followed by the elucidation of the gastroprotective mechanisms of the most effective partition. Using the ethanol-induced gastric ulcer assay, all partitions exerted significant gastroprotection, with EAMM being the most effective partition. EAMM significantly (i) reduced the volume and acidity (free and total) while increasing the pH of gastric juice and enhanced the gastric wall mucus secretion when assessed using the pylorus ligation assay, (ii) increased the enzymatic and nonenzymatic antioxidant activity of the stomach tissue, (iii) lost its gastroprotective activity following pretreatment with N-omega-nitro-L-arginine methyl ester (L-NAME; NO blocker) or carbenoxolone (CBXN; NP-SH blocker), (iv) exerted antioxidant activity against various in vitro oxidation assays, and (v) showed moderate in vitro anti-inflammatory activity via the LOX-modulated pathway. In conclusion, EAMM exerts a remarkable NO/NP-SH-dependent gastroprotective effect that is attributed to its antisecretory and antioxidant activities, ability to stimulate the gastric mucus production and endogenous antioxidant system, and synergistic action of several gastroprotective-induced flavonoids.
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Lee HL, Kang KS. Protection Effect of Punicalagin Isolated from Pomegranate on Inflammation and Ethanol-induced Gastric Mucosal Injury. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hye Lim Lee
- College of Korean Medicine; Gachon University; Seongnam 13120 Korea
| | - Ki Sung Kang
- College of Korean Medicine; Gachon University; Seongnam 13120 Korea
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Takayama C, de-Faria FM, de Almeida ACA, Dunder RJ, Manzo LP, Socca EAR, Batista LM, Salvador MJ, Souza-Brito ARM, Luiz-Ferreira A. Chemical composition of Rosmarinus officinalis essential oil and antioxidant action against gastric damage induced by absolute ethanol in the rat. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2015.09.027] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Zakaria ZA, Balan T, Azemi AK, Omar MH, Mohtarrudin N, Ahmad Z, Abdullah MNH, Desa MNM, Teh LK, Salleh MZ. Mechanism(s) of action underlying the gastroprotective effect of ethyl acetate fraction obtained from the crude methanolic leaves extract of Muntingia calabura. Altern Ther Health Med 2016; 16:78. [PMID: 26912079 PMCID: PMC4765037 DOI: 10.1186/s12906-016-1041-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 02/12/2016] [Indexed: 12/22/2022]
Abstract
Background Muntingia calabura L. (family Muntingiaceae), commonly known as Jamaican cherry or kerukup siam in Malaysia, is used traditionally to treat various ailments. The aim of this study is to elucidate the possible underlying gastroprotective mechanisms of ethyl acetate fraction (EAF) of Muntingia calabura methanolic leaves extract (MEMC). Methods MEMC and its fractions were subjected to HPLC analysis to identify and quantify the presence of its phyto-constituents. The mechanism of gastroptotection of EAF was further investigated using pylorus ligation-induced gastric lesion rat model (100, 250, and 500 mg/kg). Macroscopic analysis of the stomach, evaluation of gastric content parameters such as volume, pH, free and total acidity, protein estimation, and quantification of mucus were carried out. The participation of nitric oxide (NO) and sulfhydryl (SH) compounds was evaluated and the superoxide dismutase (SOD), gluthathione (GSH), catalase (CAT), malondialdehyde (MDA), prostaglandin E2 (PGE2) and NO level in the ethanol induced stomach tissue homogenate was determined. Results HPLC analysis confirmed the presence of quercetin and gallic acid in EAF. In pylorus-ligation model, EAF significantly (p <0.001) prevent gastric lesion formation. Volume of gastric content and total protein content reduced significantly (p < 0.01 and p < 0.05, respectively), while free and total acidity reduced in the doses of 250 and 500 mg/kg (p <0.001 and p <0.05, respectively). EAF also augmented the mucus content significantly (p < 0.001). Pre-treatment with N-nitro-L-arginine methyl ester (L-NAME) or N-ethylmaleimide (NEM) reversed the gastroprotective activity of EAF. EAF treatment markedly ameliorated the SOD, GSH and CAT activity and PGE2 and NO level while attenuating MDA level, relative to the vehicle group. Conclusions In conclusion, the underlying gastroprotective mechanisms of EAF could be associated with the antisecretory, participation of mucus, antiperoxidative, improvement of antioxidant status, modulation of NO and SH compounds, stimulation of PGE2 as well as presence of quercetin and gallic acid.
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The Preventive Effect on Ethanol-Induced Gastric Lesions of the Medicinal Plant Plumeria rubra: Involvement of the Latex Proteins in the NO/cGMP/K ATP Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:706782. [PMID: 26788111 PMCID: PMC4691623 DOI: 10.1155/2015/706782] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/26/2015] [Accepted: 11/26/2015] [Indexed: 01/28/2023]
Abstract
Plumeria rubra (Apocynaceae) is frequently used in folk medicine for the treatment of gastrointestinal disorders, hepatitis, and tracheitis, among other infirmities. The aim of this study was to investigate the gastroprotective potential of a protein fraction isolated from the latex of Plumeria rubra (PrLP) against ethanol-induced gastric lesions and describe the underlying mechanisms. In a dose-dependent manner, the pretreatment with PrLP prevented ethanol-induced gastric lesions in mice after single intravenous administration. The gastroprotective mechanism of PrLP was associated with the involvement of prostaglandins and balance of oxidant/antioxidant factors. Secondarily, the NO/cGMP/KATP pathway and activation of capsaicin-sensitive primary afferents were also demonstrated as part of the mechanism. This study shows that proteins extracted from the latex of P. rubra prevent gastric lesions induced in experimental animals. Also, the results support the use of the plant in folk medicine.
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Balan T, Sani MHM, Mumtaz Ahmad SH, Suppaiah V, Mohtarrudin N, Zakaria ZA. Antioxidant and anti-inflammatory activities contribute to the prophylactic effect of semi-purified fractions obtained from the crude methanol extract of Muntingia calabura leaves against gastric ulceration in rats. JOURNAL OF ETHNOPHARMACOLOGY 2015; 164:1-15. [PMID: 25540923 DOI: 10.1016/j.jep.2014.12.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 12/01/2014] [Accepted: 12/14/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In traditional medicine, the leaves, flowers, barks and roots of Muntingia calabura L. (Muntingiaceae) have been employed as a treatment for various ailments including dyspepsia and to relieve pain caused by gastritis and peptic ulcer disease. The methanolic extract of Muntingia calabura leaves (MEMC) has been proven in the previous study to possess significant antiulcer activity. In this study, we attempted to determine the prophylactic effect of the fractions obtained from MEMC against ethanol-induced gastric lesion in rats and the involvement of antioxidants and anti-inflammatory mediators. MATERIALS AND METHODS The MEMC was fractionated with petroleum ether (PEF), ethyl acetate (EAF) and distilled water (AQF). These fractions were investigated for possible antiulcer property using ethanol-induced gastric ulcer rat model. The rats were administered orally once daily with 8% Tween 80 (control), 100mg/kg ranitidine, or the fractions, in the doses of 100, 250, and 500 mg/kg, for 7 days, followed by ulcer induction using absolute ethanol. The rats were euthanized; macroscopic and histological observations of the stomach were done. The ulcer area (UA) was determined and the percentage protection afforded by the fractions was calculated. The fractions were subjected to antioxidant studies including the superoxide and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, oxygen radical absorbance capacity (ORAC) and total phenolic content (TPC) assay. Involvement of nitric oxide (NO) and inflammatory mediators such as lipoxygenase (LOX) and xanthine oxidase (XO) were evaluated. Phytochemical screening and HPLC analysis of the fractions were also conducted. RESULTS Pre-treatment of PEF and EAF significantly (p<0.001) attenuated the gastric lesions as compared to the control group in a dose-dependent manner. On the other hand, 100 and 250 mg/kg of AQF significantly (p<0.001) prevented the ulcer formation but at the highest dose (500 mg/kg), AQF failed to significantly reduce the ulcer formation, showing a dose-independent antiulcerative effect of AQF. The histological evaluation supported the observed gastroprotective activity of PEF, EAF and AQF. All the fractions showed high superoxide and DPPH scavenging activity, meanwhile the EAF showed highest TPC followed by PEF and AQF. These fractions also significantly (p<0.05) inhibited the NO while maintaining the viability of the cells. EAF exhibited high inhibition towards both the LOX and XO enzymes, meanwhile PEF and AQF exerted high LOX inhibition but low XO inhibition. Phytochemical screening and HPLC profiling suggested the presence of flavonoid- and tannin based compounds in PEF and EAF. CONCLUSION It can be concluded that the prophylactic effect of the fractions on gastric ulceration in rats is associated with its high antioxidant activity and its ability to effectively inhibit the inflammation mediators. Presence of several flavonoids and gallic acid explains the effectiveness of the fractions in affording protection against gastric damages.
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Affiliation(s)
- Tavamani Balan
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia
| | - Mohd Hijaz Mohd Sani
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia
| | - Salahuddin Haji Mumtaz Ahmad
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia
| | - Velan Suppaiah
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, 57000 Kuala Lumpur, Malaysia
| | - Norhafizah Mohtarrudin
- Department of Pathology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia
| | - Zainul Amiruddin Zakaria
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia.
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Reduction of histopathological images through a decrease in H2O2 levels in diabetic rats with polysaccharide peptides. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.bgm.2014.09.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Jeon WY, Shin IS, Shin HK, Lee MY. Gastroprotective effect of the traditional herbal medicine, Sipjeondaebo-tang water extract, against ethanol-induced gastric mucosal injury. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 14:373. [PMID: 25280763 PMCID: PMC4193290 DOI: 10.1186/1472-6882-14-373] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 09/22/2014] [Indexed: 03/04/2023]
Abstract
Background Sipjeondaebo-tang, a traditional herbal medicine, has been reported to activate the immune response. Although, most research has focused on its anticancer activity. The purpose of this study was to determine whether Sipjeondaebo-tang exerts antioxidant activity against ethanol-induced gastric injury. Methods Gastric mucosal injury was induced by the oral administration of absolute ethanol at 5 mL/kg to rats after 18 h fast. Sipjeondaebo-tang water extract (SDTW; 200 mg/kg of body weight) was administered to rats 2 h before the oral administration of absolute ethanol. Gastric mucosal injury was evaluated by measuring the gastric injury, such as extent of lesions, malondialdehyde (MDA) concentration, glutathione (GSH) content and activities of antioxidant enzymes including catalase, glutathione peroxidase, glutathione S-transferase, glutathione reductase, and superoxide dismutase in stomach tissue. Results Oral administration of SDTW markedly decreased the damage by conditioning the gastric mucosa such as hemorrhage, hyperemia. Pretreatment with SDTW significantly reduced MDA concentration and significantly increased GSH content and the activities of antioxidant enzymes. In an acute toxicity study, no adverse effects of SDTW were observed at doses up to 5000 mg/kg/day. Conclusions SDTW may protect the gastric mucosa against ethanol-induced gastric mucosa injury. These results suggested that SDTW might also play an important role in the gastroprotection based on their antioxidant effect.
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Mahmud I, Islam MK, Saha S, Barman AK, Rahman MM, Anisuzzman M, Rahman T, Al-Nahain A, Jahan R, Rahmatullah M. Pharmacological and Ethnomedicinal Overview of Heritiera fomes: Future Prospects. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2014; 2014:938543. [PMID: 27382611 PMCID: PMC4897052 DOI: 10.1155/2014/938543] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 05/25/2014] [Accepted: 05/27/2014] [Indexed: 02/05/2023]
Abstract
Mangrove plants are specialized woody plants growing in the swamps of tidal-coastal areas and river deltas of tropical and subtropical parts of the world. They have been utilized for medicinal and other purposes by the coastal people over the years. Heritiera fomes Buch. Ham. (family: Sterculiaceae) commonly known as Sundari (Bengali) is a preeminent mangrove plant occurring in the Sundarbans forest located in the southern part of Bangladesh and adjoining West Bengal province of India. The plant has applications in traditional folk medicine as evidenced by its extensive use for treating diabetes, hepatic disorders, gastrointestinal disorders, goiter, and skin diseases by the local people and traditional health practitioners. A number of investigations indicated that the plant possesses significant antioxidant, antinociceptive, antihyperglycemic, antimicrobial, and anticancer activities. Phytochemical analyses have revealed the presence of important chemical constituents like saponins, alkaloids, glycosides, tannins, steroids, flavonoids, gums, phytosterols, and reducing sugars. The present study is aimed at compiling information on phytochemical, biological, pharmacological, and ethnobotanical properties of this important medicinal plant, with a view to critically assess the legitimacy of the use of this plant in the aforementioned disorders as well as providing directions for further research.
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Affiliation(s)
- Imran Mahmud
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Md Khirul Islam
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Sanjib Saha
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Apurba Kumar Barman
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Md Mustafizur Rahman
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Md Anisuzzman
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Taufiq Rahman
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, UK
| | - Abdullah Al-Nahain
- Department of Pharmacy, University of Development Alternative, Dhanmondi, Dhaka 1209, Bangladesh
| | - Rownak Jahan
- Department of Biotechnology & Genetic Engineering, University of Development Alternative, Dhanmondi, Dhaka 1209, Bangladesh
| | - Mohammed Rahmatullah
- Department of Pharmacy, University of Development Alternative, Dhanmondi, Dhaka 1209, Bangladesh
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Amang PA, Tan PV, Patamaken SA, Mefe MN. Cytoprotective and antioxidant effects of the methanol extract of Eremomastax speciosa in rats. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES : AJTCAM 2013; 11:165-71. [PMID: 24653572 PMCID: PMC3957260 DOI: 10.4314/ajtcam.v11i1.26] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Ethno-botanical information shows that Eremomastax speciosa is used in the traditional management of various stomach complaints including gastro-duodenal ulcers. MATERIALS AND METHODS In this study, we tested the cytoprotective potential of the whole plant methanol extract (100-200 mg/kg, p.o), against HCl/ethanol, absolute ethanol, cold/restraint stress rats, and pylorus legated rats pre-treated with indomethacin. The effects of the extract on gastric lesion inhibition, the volume of gastric juice, gastric pH, gastric acid output, mucus production and gastric peptic activity were recorded. Oxidative stress parameters were measured in blood and gastric tissue samples obtained from the animals in all the models tested. RESULTS The extract significantly (p<0.05), reduced the formation of cold/restraint ulcers by (31-60%, inhibition), completely inhibited (100%) the formation of lesions induced by HCl/ethanol at the highest dose, but was less effective against absolute ethanol (22-46% inhibition). The extract (200 mg/kg), significantly reduced lesion formation (P<0.01), gastric acidity (P<0.01), and volume of gastric secretions (P<0.05), in the indomethacin/pylorus ligation model, and did not affect the activity of pepsin in gastric juice. Blood concentrations of antioxidant enzymes (catalase, SOD and GSH), increased significantly and MDA concentrations decreased in all models tested. CONCLUSION Cytoprotection by E. speciosa methanol extract was attributed to its ability to reduce acid secretion, and to enhance mucosal defence and in vivo antioxidant status.
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Affiliation(s)
- Perfusion A Amang
- Department of Animal Biology and Physiology, Faculty of Science, P.O. Box 812, University of Yaounde I, Cameroon
| | - Paul V Tan
- Department of Animal Biology and Physiology, Faculty of Science, P.O. Box 812, University of Yaounde I, Cameroon
| | - Simon A Patamaken
- Department of Animal Biology and Physiology, Faculty of Science, P.O. Box 812, University of Yaounde I, Cameroon
| | - Martial N Mefe
- Department of Animal Biology and Physiology, Faculty of Science, P.O. Box 812, University of Yaounde I, Cameroon
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Nartey ET, Ofosuhene M, Agbale CM. Anti-ulcerogenic activity of the root bark extract of the African laburnum "Cassia sieberiana" and its effect on the anti-oxidant defence system in rats. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 12:247. [PMID: 23228052 PMCID: PMC3577646 DOI: 10.1186/1472-6882-12-247] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Accepted: 12/07/2012] [Indexed: 02/07/2023]
Abstract
BACKGROUND Despite the widespread use of roots of Cassia sieberiana in managing several health conditions including gastric ulcer disease, there is little scientific data to support the rational phytotherapeutics as an anti-ulcer agent. This paper reports an evaluation of the in vivo anti-oxidant properties of an aqueous root bark extract of C. sieberiana in experimental gastric ulcer rats in a bid to elucidate its mechanism of action. METHODS Fisher 344 (F(344)) rats received pretreatment of C. sieberiana root bark extract (500, 750, and 1000 mg/kg body wt.) for 7 days after which there was induction of gastric injury with absolute ethanol. The mean ulcer index (MUI) was calculated and serum total anti-oxidant level determined. Gastric mucosal tissues were prepared and the activity level of the enzymes superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and myeloperoxidase (MPO) were measured together with the level of lipid hydroperoxides (LPO). Statistical difference between treatment groups was analysed using one-way analysis of variance (ANOVA) followed by Dunnett's post hoc t test. Statistical significance was calculated at P< 0.05. RESULTS The administration of ethanol triggered severe acute gastric ulcer and pretreatment with C. sieberiana root bark extract significantly and dose dependently protected against this effect. The root bark extract also dose dependently and significantly inhibited the ethanol induced decrease in activity levels of the enzymes SOD, CAT and GPx. The extract also inhibited the ethanol-induced decrease in level of serum total anti-oxidant capacity. The increase in ethanol-induced LPO level and MPO activity were also significantly and dose-dependently inhibited by the root bark extract. CONCLUSIONS The gastro-cytoprotective effect, inhibition of decrease in activity of gastric anti-oxidant enzymes and MPO as well as the inhibition of gastric LPO level suggests that one of the anti-ulcer mechanisms of C. sieberiana is the anti-oxidant property.
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Effects of Rhizophora mangle on Experimental Colitis Induced by TNBS in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:753971. [PMID: 23056142 PMCID: PMC3465987 DOI: 10.1155/2012/753971] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 08/23/2012] [Indexed: 02/08/2023]
Abstract
Male Unib-WH rats were pretreated for two weeks with butanolic (BuOH) and ethyl acetate (EtOAc) fractions. Colitis was induced by rectal administration of TNBS, the treatment continued, and animals were sacrificed on day 7 after the TNBS administration. Phytochemical studies were performed in order to provide the characterization of the tannins present in the bark of R. mangle. Results showed that EtOAc fraction increased the levels of IL-10 (∗∗P < 0.01) and diminished the levels of TNF-α (∗∗∗P < 0.001) and IL-6 (∗∗P < 0.01). BuOH fraction reduced the MPO activity (∗∗P < 0.01) and levels of TBARS (∗∗∗P < 0.001); it also increased COX-1 expression, diminished the levels of TNF-α (∗∗∗P < 0.001), and increased the levels of IL-12 (∗∗∗P < 0.001). Besides, both treatments augmented the levels of GSH (∗P < 0.05), the activity of GSH-Px (∗∗P < 0.01 for BuOH fraction and ∗∗∗P < 0.001 for EtOAc fraction), and CAT (∗∗P < 0.01). In conclusion, both treatments ameliorated the injury induced by TNBS through different mechanisms, probably by their chemical composition which directed its activity into an antioxidant or anti-inflammatory response, leading to an immune modulation.
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Nekvapil T, Kopriva V, Boudny V, Hostovsky M, Dvorak P, Malota L. Decrease in the antioxidant capacity in beverages containing tea extracts during storage. ScientificWorldJournal 2012; 2012:361698. [PMID: 22997491 PMCID: PMC3444831 DOI: 10.1100/2012/361698] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 08/05/2012] [Indexed: 12/01/2022] Open
Abstract
The aim of this work was to determine antioxidant capacity of beverages containing black, white, and green tea extracts using the photochemiluminescence method, and to monitor its changes based on the storage temperature and time. Samples were stored at two different temperatures (refrigerated at 4°C and laboratory temperature 22°C), analyzed after opening of the original package, and consequently after 4 and 7 days. Results of the antioxidant capacity are expressed as the standard equivalents, that is, ascorbic acid in mmol/L. The highest mean value of the antioxidant capacity was found after opening of the original package in fruit-juice-enriched samples and totaled 9.793 mmol/L. This group revealed significant dependence (P < 0.05) not only on the storage time, but also temperature. In samples without added fruit juices containing preservatives the value was 0.428 mmol/L. This group showed significant dependence (P < 0.05) on the decrease of antioxidant capacity only when based on the storage time. Samples without fruit juices or preservatives showed significant decrease in the antioxidant capacity (P < 0.05) after 4 days of storage based on the storage time. The dependence on temperature was revealed only after 7 days of storage.
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Affiliation(s)
- Tomas Nekvapil
- Department of Biochemistry, Chemistry and Biophysics, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho 1-3, 61242 Brno, Czech Republic.
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