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Protective Effects of Anwulignan against HCl/Ethanol-Induced Acute Gastric Ulcer in Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9998982. [PMID: 34335857 PMCID: PMC8298145 DOI: 10.1155/2021/9998982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/30/2021] [Indexed: 02/06/2023]
Abstract
Gastric ulcer is one of the most common gastrointestinal diseases. Anwulignan (AN) is a major active component of Schisandra sphenanthera Rehd. This study was designed to evaluate the protective effect of AN against the acute gastric ulcer induced by HCl/ethanol in mice. The mice were given HCl/ethanol by gavage to establish an acute gastric ulcer model. Then, the serum and gastric tissue samples were taken for biochemical analyses. The results showed that the pretreatment with AN could significantly reduce the gastric ulcer index (GUI) and increase the ulcer inhibition rate, indicating that AN can protect against gastric ulcers. AN showed its antioxidant roles by decreasing the content of reactive oxygen species (ROS), malondialdehyde (MDA), and 8-hydroxydeoxyguanosine (8-OHdG) and increasing the activity of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) and anti-inflammatory roles by decreasing the content of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1β (IL-1β), and myeloperoxidase (MPO) and increasing the content of interleukin-2 (IL-2), interleukin-4 (IL-4), interleukin-10 (IL-10), prostaglandin E2 (PGE2), and nitric oxide (NO) in both serum and gastric tissue. Furthermore, AN also activated the NRF2/ARE signaling pathway and inhibited the MAPK/NF-κB signaling pathway. AN improves the acute gastric ulcer induced by HCl/ethanol in mice, which may be mainly through its antioxidant capacity and anti-inflammatory effect.
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Sudi IY, Ahmed MU, Adzu B. Sphaeranthus senegalensis DC: Evaluation of chemical constituents, oral safety, gastroprotective activity, and mechanism of action of its hydroethanolic extract. JOURNAL OF ETHNOPHARMACOLOGY 2021; 268:113597. [PMID: 33221497 DOI: 10.1016/j.jep.2020.113597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/26/2020] [Accepted: 11/15/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Sphaeranthus senegalensis DC is a seasonal herb with a spicy smell that grows wild in wet grounds of tropical Africa and Asia. The plant is used in folk medicine for the treatment of various diseases; that includes its use to treat gastric ulcers. AIM OF THE STUDY This study aimed to investigate the chemical constituents of the hydroethanolic extract of Sphaeranthus senegalensis DC and evaluate its oral safety, gastroprotective activity, and mechanisms of action using laboratory models in rats and mice. MATERIALS AND METHODS Hydroethanolic extract (70%) of the powdered whole dried material was prepared, and chemical constituents of the resultant extract (denoted HESs) standardized using the high-performance liquid chromatography (HPLC) method. The safety profile of HESs was assessed using 2000 mg/kg, oral (p.o.) for Hippocratic screening in mice, and 800 mg/kg, p.o. for 28 days subchronic toxicity assay in rats. The gastroprotective effect of HESs (25, 100, and 400 mg/kg, p.o.) was investigated using acidified ethanol, piroxicam, water immobilization stress, and acetic acid-induced ulcer models. The gastroprotective mechanisms of HESs were evaluated using its effect on gastric mucus protection, nitric oxide modulation, gastric juice secretory parameters, catalase and myeloperoxidase activities. Histological analysis of the stomach tissues was also carried out. RESULTS The HPLC analysis indicated the presence of 25.94% phenolics (gallic acid, caffeic acid, and ferulic acid) and 14.53% flavonoids (rutin, morin, luteolin, quercetin, and apigenin). Hippocratic screening and the 28 days subchronic study indicated that HESs is generally safe. Result shows that oral administration of HESs (25, 100 and 400 mg/kg) alleviated the severity of the gastric ulcers induced by acidified ethanol by 35.65% (p < 0.05), 48.70% (p < 0.05) and 78.02% (p < 0.001) respectively; exhibited gastroprotective effect against the gastric lesions induced by piroxicam by 37.97% (p < 0.05), 53.27% (p < 0.05) and 76.23% (p < 0.001) respectively; and decreased the severity of the water immobilization stress-induced gastric ulcers by 32.43% (p < 0.05), 55.26% (p < 0.01) and 74.05% (p < 0.001) respectively, when compared to the vehicle control group. The mechanisms of action assays indicated that the gastroprotective activity was mediated mainly through gastroprotection, antisecretory, and antioxidant activities. Histological analysis showed it inhibited epithelial cell loss, vascular damage, and leucocyte infiltration. CONCLUSION HESs contains useful phytochemicals, is safe, and exhibited significant gastroprotective action. The results provided justification for its claim in the treatment of gastric ulcers and its evaluation for potential application as a gastroprotective agent.
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Affiliation(s)
- Ismaila Yada Sudi
- Department of Biochemistry, Faculty of Science, Adamawa State University (ADSU), Mubi, Adamawa State, Nigeria.
| | - Maryam Usman Ahmed
- Department of Biochemistry, Faculty of Science, Adamawa State University (ADSU), Mubi, Adamawa State, Nigeria
| | - Bulus Adzu
- Department of Pure and Applied Chemistry, Faculty of Science, Adamawa State University (ADSU), Mubi, Adamawa State, Nigeria; Department of Pharmacology and Toxicology, National Institute for Pharmaceutical Research and Development (NIPRD), Abuja, Nigeria.
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Dejban P, Eslami F, Rahimi N, Takzare N, Jahansouz M, Dehpour AR. Involvement of nitric oxide pathway in the anti-inflammatory effect of modafinil on indomethacin-, stress-, and ethanol -induced gastric mucosal injury in rat. Eur J Pharmacol 2020; 887:173579. [PMID: 32950497 PMCID: PMC7495189 DOI: 10.1016/j.ejphar.2020.173579] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 01/22/2023]
Abstract
Gastric ulcer is a prevalent disease with various etiologies, including non-steroidal anti-inflammatory drugs (NSAIDs), stress conditions, and alcohol, resulting in an inflammatory condition in the gastric mucosa. The aim of this study was to explore the protective effects of modafinil on gastric erosions induced by indomethacin, water-immersion stress, and alcohol in rats and to evaluate the role of nitric oxide (NO) pathway. Animals were allocated to the three experimental models of gastric ulcer – indomethacin (30 mg/kg PO), water-immersion stress, and ethanol (5 ml/kg PO). Induction of gastric ulcer in all models caused an increase in J-score (macroscopic assessment), biochemical markers, including tumor necrosis factor-alpha (TNF-α), interleukin-1beta (IL-1β), and myeloperoxidase (MPO), and microscopic destructions. Administration of modafinil (50 and 100 mg/kg i. p) significantly improved J-score in the indomethacin (P < 0.05) and stress models (P < 0.001). Moreover, the level of TNF-α IL-1β, and MPO was deceased after modafinil administration (P < 0.001). However, modafinil did not have any effects on gastric injury induced by ethanol. In addition, co-administration of L-NAME (a non-specific NO synthase inhibitor) and aminoguanidine (an inducible NO synthase inhibitor) with modafinil significantly neutralized the gastroprotective effect of modafinil in the indomethacin and water-immersion stress groups (P < 0.05, and P < 0.01; respectively), while 7-nitroindazole (a neuronal NO synthase inhibitor) did not show such reversing effects. In conclusion, modafinil possesses gastroprotective effects on the gastric lesions induced by indomethacin and stress, which are probably mediated via the inflammation inhibition and NO pathway modulation.
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Affiliation(s)
- Pegah Dejban
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Faezeh Eslami
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nastaran Rahimi
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasrin Takzare
- Department of Anatomy, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Mohamadmostafa Jahansouz
- PERFUSE Study Group, Cardiovascular Division, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Ahmad Reza Dehpour
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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Gastroprotective Effects of Betanin Against Ethanol-induced Gastric Ulcer in Rats. Jundishapur J Nat Pharm Prod 2019. [DOI: 10.5812/jjnpp.14473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Adefisayo MA, Adeyemi WJ, Alabi QK. Combined but not single administration of vitamin C and l-carnitine ameliorates cisplatin-induced gastric mucosa damage in male rats. Can J Physiol Pharmacol 2018; 96:830-838. [PMID: 29677454 DOI: 10.1139/cjpp-2017-0751] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Although cisplatin is a potent anticancer drug, it instigates oxidative and pro-inflammatory reactions that pose significant and distressing clinical symptoms. Therefore, this study investigated the effects of vitamin C and (or) l-carnitine on cisplatin-induced gastric mucosa damage in rat. The rats were allocated into 6 groups (n = 5). The control group received distilled water, while the treatment groups received cisplatin alone (CIP), or cisplatin with vitamin C, l-carnitine, or their combination. Cisplatin caused disruption of the gastric mucosa histoarchitecture and altered the mucus barrier function. Moreover, the stomach tissue of the CIP-treated group showed increased levels of oxidative stress markers (malondialdehyde and H2O2) and decreased activities of antioxidant (superoxide dismutase, glutathione peroxidase, catalase, glutathione S-transferase) and non-antioxidant (reduced glutathione) enzymes. These deleterious events were accompanied with significant increases in pro-inflammatory cytokines and inflammatory infiltration markers, myeloperoxidase and inducible nitric oxide synthase. However, the administration of both vitamin C and l-carnitine, and not either of the two showed additive effects in attenuating the adverse effects of cisplatin. The histological results agreed with the biochemical assays. The study concluded that the combined administration of vitamin C and l-carnitine, but not the single therapy, could prevent the adverse effects of cisplatin on gastric tissue.
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Affiliation(s)
- Modinat Adebukola Adefisayo
- a Department of Physiology, Faculty of Basic Medical Sciences, University of Medical Sciences, Ondo State, Nigeria.,b Department of Physiological Sciences, Faculty of Basic Medical Sciences, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
| | - Wale Johnson Adeyemi
- c Department of Physiology, Faculty of Basic Medical Sciences, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - Quadri Kunle Alabi
- b Department of Physiological Sciences, Faculty of Basic Medical Sciences, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.,d Department of Haematology and Blood Transfusion, Faculty of Basic Medical Sciences, College of Medicine, Afe Babalola University, Ado Ekiti, Ekiti State, Nigeria
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Khan AA, Alsahli MA, Rahmani AH. Myeloperoxidase as an Active Disease Biomarker: Recent Biochemical and Pathological Perspectives. Med Sci (Basel) 2018; 6:medsci6020033. [PMID: 29669993 PMCID: PMC6024665 DOI: 10.3390/medsci6020033] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/04/2018] [Accepted: 04/11/2018] [Indexed: 12/15/2022] Open
Abstract
Myeloperoxidase (MPO) belongs to the family of heme-containing peroxidases, produced mostly from polymorphonuclear neutrophils. The active enzyme (150 kDa) is the product of the MPO gene located on long arm of chromosome 17. The primary gene product undergoes several modifications, such as the removal of introns and signal peptides, and leads to the formation of enzymatically inactive glycosylated apoproMPO which complexes with chaperons, producing inactive proMPO by the insertion of a heme moiety. The active enzyme is a homodimer of heavy and light chain protomers. This enzyme is released into the extracellular fluid after oxidative stress and different inflammatory responses. Myeloperoxidase is the only type of peroxidase that uses H₂O₂ to oxidize several halides and pseudohalides to form different hypohalous acids. So, the antibacterial activities of MPO involve the production of reactive oxygen and reactive nitrogen species. Controlled MPO release at the site of infection is of prime importance for its efficient activities. Any uncontrolled degranulation exaggerates the inflammation and can also lead to tissue damage even in absence of inflammation. Several types of tissue injuries and the pathogenesis of several other major chronic diseases such as rheumatoid arthritis, cardiovascular diseases, liver diseases, diabetes, and cancer have been reported to be linked with MPO-derived oxidants. Thus, the enhanced level of MPO activity is one of the best diagnostic tools of inflammatory and oxidative stress biomarkers among these commonly-occurring diseases.
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Affiliation(s)
- Amjad A Khan
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
| | - Mohammed A Alsahli
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
| | - Arshad H Rahmani
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, AlQassim, P.O. Box 6699, Buraidah 51452, Saudi Arabia.
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Li J, Wang T, Zhu Z, Yang F, Cao L, Gao J. Structure Features and Anti-Gastric Ulcer Effects of Inulin-Type Fructan CP-A from the Roots of Codonopsis pilosula (Franch.) Nannf. Molecules 2017; 22:molecules22122258. [PMID: 29258255 PMCID: PMC6149740 DOI: 10.3390/molecules22122258] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/05/2017] [Accepted: 12/12/2017] [Indexed: 12/19/2022] Open
Abstract
Radix Codonopsis has been used in traditional Chinese medicine for strengthening the immune system, improving poor gastrointestinal function, treating gastric ulcers and chronic gastritis and so on. In the present study, an inulin-type fructan CP-A was obtained from the roots of Codonopsis pilosula (Franch.) Nannf. and its structure was confirmed by MS and NMR as (2 → 1) linked-β-d-fructofuranose. The protective effects of CP-A against ethanol-induced acute gastric ulcer in rats were intensively investigated. A Lacy assay demonstrated that CP-A-treated group (50 mg/kg) showed the gastric damage level 1, which was similar to the positive control group, while the model group exhibited the gastric damage level 3. The Guth assay demonstrated that the mucosa ulcer index for CP-A groups at the doses of 50 mg/kg and 25 mg/kg significantly decreased compared with that in the model group (p < 0.05). Meanwhile, CP-A significantly increased the activities of SOD and GSH-Px, and decreased the contents of MDA and NO, and the activity of MPO in gastric tissue in a dose-dependent manner (p < 0.05). The present research reported for the first time that inulin-type fructan CP-A were likely the potential component in Radix Codonopsis for treatment of acute gastric ulcers.
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Affiliation(s)
- Jiankuan Li
- School of Pharmaceutical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
| | - Tao Wang
- School of Pharmaceutical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
| | - Zhichuan Zhu
- School of Pharmaceutical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
| | - Fengrong Yang
- School of Pharmaceutical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
| | - Lingya Cao
- School of Basic Medical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
| | - Jianping Gao
- School of Pharmaceutical Science, Shanxi Medical University, No. 56 Xinjian South Road, Taiyuan 030001, China.
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Li W, Wang X, Zhi W, Zhang H, He Z, Wang Y, Liu F, Niu X, Zhang X. The gastroprotective effect of nobiletin against ethanol-induced acute gastric lesions in mice: impact on oxidative stress and inflammation. Immunopharmacol Immunotoxicol 2017; 39:354-363. [PMID: 28948855 DOI: 10.1080/08923973.2017.1379088] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
CONTEXT Gastric ulcer is a common gastrointestinal disorder with increasing incidence and prevalence attributed to loss of balance between aggressive and protective factors. Nobiletin (NOB), a major component of polymethoxyflavones in citrus fruits, has a broad spectrum of health beneficial properties including anti-inflammatory and anti-tumor activities. Although NOB was originally shown to possess anti-inflammatory activity, its effects on gastric ulcer were rarely explored previously. OBJECTIVE The aim of the present study was to investigate the anti-ulcerogenic activity of NOB on ethanol-induced gastric ulcer in mice and to elucidate the underlying mechanisms. METHODS Seventy-two male Kunming mice administered with absolute ethanol (0.2 ml/animal) were pretreated with NOB (5, 10 or 20 mg/kg), cimetidine (100 mg/kg), or vehicles by intragastric administration in different experimental groups for three days, and animals were euthanized 3 h after ethanol ingestion. Gross and microscopic lesions, immunological and biochemical parameters were taken into consideration. RESULTS The results showed that ethanol induced gastric injury, increased malondialdehyde (MDA) levels, decreased glutathione (GSH) content, superoxide dismutase (SOD) activity, and prostaglandin E2 (PGE2) levels, increased pro-inflammatory cytokines tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) levels and myeloperoxidase (MPO) activity, as well as the expression MAPK signaling pathway. Pretreatment with NOB significantly attenuated the gastric lesions as compared to the ethanol group. CONCLUSIONS These findings suggest that the gastroprotective activity is attribute to the improvement of antioxidant activities, the stimulation of PGE2, and the reduction of pro-inflammatory cytokines through the MAPK pathway.
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Affiliation(s)
- Weifeng Li
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Xiumei Wang
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Wenbing Zhi
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Hailin Zhang
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Zehong He
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Yu Wang
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Fang Liu
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Xiaofeng Niu
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
| | - Xuemei Zhang
- a School of Pharmacy , Xi'an Jiaotong University , Xi'an , PR China
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Paulrayer A, Adithan A, Lee JH, Moon KH, Kim DG, Im SY, Kang CW, Kim NS, Kim JH. Aronia melanocarpa (Black Chokeberry) Reduces Ethanol-Induced Gastric Damage via Regulation of HSP-70, NF-κB, and MCP-1 Signaling. Int J Mol Sci 2017; 18:ijms18061195. [PMID: 28587230 PMCID: PMC5486018 DOI: 10.3390/ijms18061195] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/15/2017] [Accepted: 05/17/2017] [Indexed: 01/02/2023] Open
Abstract
Aronia melanocarpa (Michx.) Ell. belongs to the Rosaceae family. The purpose of this study is to explore the gastroprotective effect of the Aronia melanocarpa hydro-alcoholic extract (AMHAE) against ethanol-induced gastric ulcer in a rat model. Different concentrations (50, 100, and 200 mg/kg) of AMHAE, or 30 mg/kg of omeprazole, significantly inhibited the gastric injury formation. The ethanol-induced ulcer group showed significant increases of malondialdehyde (MDA), myeloperoxidase (MPO), tumor necrosis factor (TNF)-α, nuclear factor-kappaB p65 (NF-κB p65), and monocyte chemoattractant protein (MCP)-1, and decreased activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-px), and interleukin (IL)-4. However, AMHAE (200 mg/kg) pretreatment significantly reversed the altered pathophysiological levels of these biomolecules to near normal stages. The gastroprotective activity of AMHAE was abolished by pretreatment with l-NAME, naloxone, capsazepine, and indomethacin, demonstrating the participation of nitric oxide (NO), opioids, TRPV (vanilloid receptor-related transient receptor potential), and prostaglandins in AMHAE-assisted gastroprotection against ethanol-induced gastric injuries. This gastroprotective effect of AMHAE might be due to the downregulation of TNF-α-based NF-κB, MCP-1 signaling and strong antioxidant properties.
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Affiliation(s)
- Antonisamy Paulrayer
- College of Veterinary Medicine, BK21PLUS project, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-do 54596, Korea.
| | - Aravinthan Adithan
- College of Veterinary Medicine, BK21PLUS project, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-do 54596, Korea.
| | - Jeong Ho Lee
- Sunchang Reserch Institute of Health and Longevity, Ingye-myeon Indeok-ro, Sunchang-gun, Jeollabuk-do 56015, Korea.
| | - Kwang Hyun Moon
- Sunchang Reserch Institute of Health and Longevity, Ingye-myeon Indeok-ro, Sunchang-gun, Jeollabuk-do 56015, Korea.
| | - Dae Geun Kim
- Sunchang Reserch Institute of Health and Longevity, Ingye-myeon Indeok-ro, Sunchang-gun, Jeollabuk-do 56015, Korea.
| | - So Yeon Im
- Sunchang Reserch Institute of Health and Longevity, Ingye-myeon Indeok-ro, Sunchang-gun, Jeollabuk-do 56015, Korea.
| | - Chang-Won Kang
- College of Veterinary Medicine, BK21PLUS project, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-do 54596, Korea.
| | - Nam Soo Kim
- College of Veterinary Medicine, BK21PLUS project, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-do 54596, Korea.
| | - Jong-Hoon Kim
- College of Veterinary Medicine, BK21PLUS project, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-do 54596, Korea.
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Bozkurt İ, Dilek E, Erol HS, Çakir A, Hamzaoğlu E, Koç M, Keleş ON, Halici MB. Investigation on the effects of pomiferin from Maclura pomifera on indomethacin-induced gastric ulcer: An experimental study in rats. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1913-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Ohta Y, Yashiro K, Kobayashi T, Inui K, Yoshino J. Protective effect ofN,N’-dimethylthiourea against stress-induced gastric mucosal lesions in rats. Fundam Clin Pharmacol 2017; 31:319-328. [DOI: 10.1111/fcp.12268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 01/11/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Yoshiji Ohta
- Department of Chemistry; Fujita Health University School of Medicine; Toyoake Aichi 470-1192 Japan
| | - Koji Yashiro
- Department of Chemistry; Fujita Health University School of Medicine; Toyoake Aichi 470-1192 Japan
| | - Takashi Kobayashi
- Department of Internal Medicine; Second Teaching Hospital; Fujita Health University School of Medicine; Nagoya Aichi 454-0012 Japan
| | - Kazuo Inui
- Department of Internal Medicine; Second Teaching Hospital; Fujita Health University School of Medicine; Nagoya Aichi 454-0012 Japan
| | - Junji Yoshino
- Dainagoya building Central Clinic; Nagoya Aichi 450-6409 Japan
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Li W, Wang Y, Wang X, Zhang H, He Z, Zhi W, Liu F, Niu X. Gastroprotective effect of esculin on ethanol-induced gastric lesion in mice. Fundam Clin Pharmacol 2017; 31:174-184. [DOI: 10.1111/fcp.12255] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 10/17/2016] [Accepted: 11/17/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Weifeng Li
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Yu Wang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Xiumei Wang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Hailin Zhang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Zehong He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Wenbing Zhi
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Fang Liu
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Xiaofeng Niu
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
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Ethel Garc L, Elena Sanc M, Arrieta-Ba D, Cruz-Anton L, Miguel Mej C, Ruth Soto- C, Arrieta J. Gastroprotection of 2,3-epoxyjuanislamin, Isolated from Calea urticifolia, Against Ethanol-induced Gastric Lesions in Wistar Rats. INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.893.900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Alonso-Castro AJ, Pérez-Ramos J, Sánchez-Mendoza E, Pérez-González C, Pérez-Gutiérrez S. Effects of kramecyne on LPS induced chronic inflammation and gastric ulcers. Drug Dev Res 2016; 76:185-93. [PMID: 26109468 DOI: 10.1002/ddr.21254] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 05/17/2015] [Indexed: 01/15/2023]
Abstract
Preclinical Research Krameria cytisoides is used for the treatment of inflammation, stomach pain, and gastric ulcers. The active ingredient from this plant is a peroxide, kramecyne (KACY) which has anti-inflammatory effects. The aim of the present study was to evaluate the anti-inflammatory activities of KACY in lipopolysaccharide (LPS)-induced systemic chronic inflammation in mice for 60 days, using dexamethasone (DEX) as the positive control, vehicle (the LPS group) as the negative control and the control group (mice without inflammation). KACY did not affect survival, body weight or relative organ weight in mice but it: decreased nitric oxide (NO) production by 68%; prostaglandin E2 (PGE2 ) by 67%; increased release of anti-inflammatory cytokine IL-10 (2.0-fold), and reduced production of the proinflammatory cytokines, IL-6 (2.0-fold), IL-1β (2.4-fold), and TNF-α (2.0-fold). Furthermore, the gastroprotective effects of KACY in mice were evaluated in an ethanol-induced gastric ulcer model. The results showed that KACY at 50 and 100 mg/kg exerted gastroprotective effects with similar activity to 50 mg/kg ranitidine. In gastric tissues, KACY decreased the level of malondialdehyde (MDA) but increased the catalase (CAT) activity. KACY have potential for the treatment of chronic inflammatory diseases due its similar activity to that of DEX. It also has gastroprotective effects.
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Affiliation(s)
- Angel Josabad Alonso-Castro
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, 04960, México.,Departamento de Farmacia, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Cerro de la venada sin número, colonia pueblito de rocha, Guanajuato, Guanajuato, 36040, México
| | - Julia Pérez-Ramos
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, 04960, México
| | - Ernesto Sánchez-Mendoza
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, 04960, México
| | - Cuauhtemoc Pérez-González
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, 04960, México
| | - Salud Pérez-Gutiérrez
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, 04960, México
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Wu J, Liu K, Shi X. The anti-inflammatory activity of several flavonoids isolated from Murraya paniculata on murine macrophage cell line and gastric epithelial cell (GES-1). PHARMACEUTICAL BIOLOGY 2015; 54:868-881. [PMID: 26710980 DOI: 10.3109/13880209.2015.1089294] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
UNLABELLED Context Murraya paniculata (L.) Jack (Rutaceae), Qianlixiang in Chinese, is distributed in China. As an important traditional Chinese medicine (TCM), it demonstrates many bioactivities, such as febrifuge, astringent, anti-dysenteric, and tonic. OBJECTIVE The objective of this study is to evaluate the anti-inflammatory effect of three flavonoids isolated from M. paniculata in lipopolysaccharide (LPS)-activated murine macrophage cell line and ethanol-induced gastric damage on gastric epithelial cell (GES-1). Materials and methods Three identified flavonoids were isolated from stems and leaves of M. paniculata using ultra performance liquid chromatography (UPLC). Cell viability was measured with MTT, mouse peritoneal macrophages and GES-1 cells were incubated with 0, 0.01, 0.1, 1, 10, and 100 μM P1, P3 and P8 for 24, 48, and 72 h. The inhibitory effect of pretreatment with various concentrations of 5,7,3',4',5'-pentamethoxyflavone (P1), 5,7,3',4'-tetramethoxyflavone (P3), or 5-desmethylnobiletin 5-hydroxy-6,7,8,3',4'-pentameth-oxyflavone (P8) ranging from 0.03 to 30 μM on nitric oxide (NO) secretion was quantified by the Griess assay for 24 and 48 h, while interleukin-6 (IL-6) was measured by ELISA for 24 and 48 h. Results The effects of P1, P3, and P8 on mouse peritoneal macrophages and GES-1 cells were not attributable to cytotoxic effects at the doses of 0-10 μM. The IC50 value of P1 is 53.40 μM, P3 is 120.98 μM, and P8 is 10.73 μM. The concentration of the three flavonoids had the best effects of anti-inflammation upon NO inhibition at the dose of 3 μM. P3 had the highest inhibition on IL-6 production. The GES-1 cells pretreated with three flavonoids showed a significant increase in the level of NO (P1: 7.94 ± 0.0635 μM, P3: 8.81 ± 0.0159 μM, and P8: 8.51 ± 0.0522 μM) at 24 h and a more significant increase at 48 h (P1: 9.34 ± 0.0975 μM, P3: 11.9 ± 0.0672 μM, and P8: 9.34 ± 0.0454 μM). Discussion and conclusion The current results suggested that the anti-inflammatory activity of three flavonoids was mainly manifested in the reduction of production of NO and IL-6 production. Analysis of the structure-activity relationship indicated that the double bond at C2-C3 and the position of the B ring at C2/C3 seemed to be indispensable for the anti-inflammatory activity.
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Affiliation(s)
- Jun Wu
- a Department of Chinese Medicine Preparations , China Pharmaceutical University , Nanjing , China
| | - Kang Liu
- b Department of Pharmacology of Chinese Materia Medica , China Pharmaceutical University , Nanjing , China
| | - Xinhong Shi
- a Department of Chinese Medicine Preparations , China Pharmaceutical University , Nanjing , China
- c China Resources Sanjiu Pharmaceutical Co., Ltd , Shenzhen , China
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Anti-Ulcerogenic Properties of Lycium chinense Mill Extracts against Ethanol-Induced Acute Gastric Lesion in Animal Models and Its Active Constituents. Molecules 2015; 20:22553-64. [PMID: 26694339 PMCID: PMC6332331 DOI: 10.3390/molecules201219867] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/10/2015] [Accepted: 12/10/2015] [Indexed: 12/25/2022] Open
Abstract
The objective of this study was to explore the gastroprotective properties of the aerial part of Lycium chinense Mill (LCA) against ethanol-induced gastric mucosa lesions in mice models. Administration of LCA at doses of 50, 100, 200 and 400 mg/kg body weight prior to ethanol consumption dose dependently inhibited gastric ulcers. The gastric mucosal injury was analyzed by gastric juice acidity, glutathione (GSH), superoxide dismutase (SOD), malondialdehyde (MDA), myeloperoxidase (MPO) activities. Furthermore, the levels of the inflammatory mediators, tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in serum were also analyzed using ELISA. Pathological changes were also observed with the aid of hematoxylin-eosin (HE) staining. Our results indicated that LCA significantly reduced the levels of MPO, MDA and increased SOD and GSH activities. Furthermore, LCA also significantly inhibited the levels of TNF-α, IL-6, and IL-1β in the serum of ulcerated mice in a dose dependent manner. Immunohistological analysis indicated that LCA also significantly attenuated the overexpression of nuclear factor-κB in pretreated mice models. This findings suggests Lycium chinense Mill possesses gastroprotective properties against ethanol-induced gastric injury and could be a possible therapeutic intervention in the treatment and management of gastric ulcers.
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Atalay F, Odabasoglu F, Halici M, Cakir A, Cadirci E, Aslan A, Aydin Berktas O, Kazaz C. Gastroprotective and Antioxidant Effects ofLobaria pulmonariaand Its Metabolite Rhizonyl Alcohol on Indomethacin-Induced Gastric Ulcer. Chem Biodivers 2015; 12:1756-67. [DOI: 10.1002/cbdv.201400432] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Indexed: 12/28/2022]
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18
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Wang J, Zhang T, Zhu L, Ma C, Wang S. Anti-ulcerogenic effect of Zuojin Pill against ethanol-induced acute gastric lesion in animal models. JOURNAL OF ETHNOPHARMACOLOGY 2015; 173:459-467. [PMID: 25959443 DOI: 10.1016/j.jep.2015.04.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 03/06/2015] [Accepted: 04/14/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Zuojin Pill (ZJP), a traditional Chinese medicinal decoction, contains two herbal drugs: Coptis chinensis Franch. and Tetradium ruticarpum (A. Juss.) Hartley in the ratio of 6:1 (w/w). In this study, ZJP was evaluated for its gastroprotective potential against mucosal lesions induced by ethanol in mice. MATERIALS AND METHODS 50 mice were assigned to 5 groups: groups 1 and 2 were given distilled water orally. Group 3 was administered omeprazole 20mg/kg, groups 4 and 5 were given ZJP (1g/kg, 2g/kg, respectively). After an additional hour, the mice in groups 2-5 received ethanol (0.2ml/kg) orally while group 1 received distilled water instead. Mice were killed after 4h and their serum and stomachs subjected to further studies. The superoxidase dismutase (SOD) activities and malondialdehyde (MDA) level in serum were assayed by SOD and MDA kits, respectively. The myeloperoxidase (MPO) activities in stomachs were assayed by MPO kit. The levels of inflammatory mediators including tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in serum were assayed by enzyme-linked immunosorbent assay method (ELISA). Pathological changes were observed by hematoxylin-eosin (HE) staining. The levels of nuclear factor-кBp65 (NF-кBp65), P-NF-кBp65, P-IкBα, IкBα, P-IKKα, IKKα, P-IKKβ, IKKβ in stomachs were assayed by western blot. RESULTS The data showed that treatment with the ZJP markedly attenuated MPO, MDA, TNF-α, IL-6, IL-1βand increased SOD; and ZJP also decreased protein levels of P-NF-кBp65, P-IкBα, P-IKKαand P-IKKβin gastric stomachs. CONCLUSION It was concluded that ZJP may represents a potential therapeutic option to reduce the risk of gastric ulceration and the gastroprotective activity of ZJP might contribute in adjusting the inflammatory cytokine by regulating the NF-кB signaling pathway.
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Affiliation(s)
- Jing Wang
- Department of Physiology and Pharmacology, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, China
| | - Tianzhu Zhang
- ChangchunUniversity of Chinese Medicine, Changhcun 130117, China
| | - Lingpeng Zhu
- Department of Physiology and Pharmacology, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, China
| | - Chunhua Ma
- Department of Physiology and Pharmacology, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, China.
| | - Shumin Wang
- ChangchunUniversity of Chinese Medicine, Changhcun 130117, China.
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Li W, Yao H, Niu X, Wang Y, Zhang H, Li H, Mu Q. Protective effect of δ-amyrone against ethanol-induced gastric ulcer in mice. Immunobiology 2015; 220:798-806. [DOI: 10.1016/j.imbio.2014.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/10/2014] [Accepted: 12/22/2014] [Indexed: 11/24/2022]
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20
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Protective effects of friedelin isolated from Azima tetracantha Lam. against ethanol-induced gastric ulcer in rats and possible underlying mechanisms. Eur J Pharmacol 2015; 750:167-75. [DOI: 10.1016/j.ejphar.2015.01.015] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 12/23/2014] [Accepted: 01/05/2015] [Indexed: 11/21/2022]
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21
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Lee IC, Baek HS, Kim SH, Moon C, Park SH, Kim SH, Shin IS, Park SC, Kim JC. Effect of diallyl disulfide on acute gastric mucosal damage induced by alcohol in rats. Hum Exp Toxicol 2014; 34:227-39. [PMID: 24972622 DOI: 10.1177/0960327114537095] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This study investigated the gastroprotective effects of diallyl disulfide (DADS), a secondary organosulfur compound derived from garlic (Allium sativum L.) on experimental model of ethanol (EtOH)-induced gastric ulcer in rats. The antiulcerogenic activity of DADS was evaluated by gross/histopathological inspection, pro-inflammatory cytokines, and lipid peroxidation with antioxidant enzyme activities in the stomach. DADS (100 mg/kg) was administered by oral gavage 2 h prior to EtOH treatment (5 ml/kg). The animals were killed 1 h after receiving EtOH treatment. Pretreatment with DADS attenuated EtOH-induced gastric mucosal injury, as evidenced by decreased severity of hemorrhagic lesions and gastric ulcer index upon visual inspection. DADS also prevented histopathological alterations and gastric apoptotic changes caused by EtOH. An increase in tumor necrosis factor-α (TNF-α) and inducible nitric oxide synthase was observed in the gastric tissues of EtOH-treated rats that coincided with increased serum TNF-α and interleukin 6 levels. In contrast, DADS effectively suppressed production of pro-inflammatory mediators induced by EtOH. Furthermore, DADS prevented the formation of gastric malondialdehyde and the depletion of reduced glutathione content and restored antioxidant enzyme activities, such as catalase, glutathione peroxidase, and glutathione reductase in the gastric tissues of EtOH-treated rats. These results indicate that DADS prevents gastric mucosal damage induced by acute EtOH administration in rats and that the protective effects of DADS may be due to its potent antioxidant and anti-inflammatory activities.
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Affiliation(s)
- I-C Lee
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - H-S Baek
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - S-H Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - C Moon
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - S-H Park
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - S-H Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - I-S Shin
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungbuk, Republic of Korea
| | - S-C Park
- College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - J-C Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
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Nakamura T, Ohta Y, Ikeno K, Ohashi K, Ikeno T. Protective Effect of Repeatedly Preadministered Brazilian Propolis Ethanol Extract against Stress-Induced Gastric Mucosal Lesions in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2014; 2014:383482. [PMID: 24639881 PMCID: PMC3930185 DOI: 10.1155/2014/383482] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 12/20/2013] [Indexed: 11/17/2022]
Abstract
The present study was conducted to clarify the protective effect of Brazilian propolis ethanol extract (BPEE) against stress-induced gastric mucosal lesions in rats. The protective effect of BPEE against gastric mucosal lesions in male Wistar rats exposed to water-immersion restraint stress (WIRS) for 6 h was compared between its repeated preadministration (50 mg/kg/day, 7 days) and its single preadministration (50 mg/kg). The repeated BPEE preadministration attenuated WIRS-induced gastric mucosal lesions and gastric mucosal oxidative stress more largely than the single BPEE preadministration. In addition, the repeated BPEE preadministration attenuated neutrophil infiltration in the gastric mucosa of rats exposed to WIRS. The protective effect of the repeated preadministration of BPEE against WIRS-induced gastric mucosal lesions was similar to that of a single preadministration of vitamin E (250 mg/kg) in terms of the extent and manner of protection. From these findings, it is concluded that BPEE preadministered in a repeated manner protects against gastric mucosal lesions in rats exposed to WIRS more effectively than BPEE preadministered in a single manner possibly through its antioxidant and anti-inflammatory actions.
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Affiliation(s)
| | - Yoshiji Ohta
- Department of Chemistry, Fujita Health University School of Medicine, Toyoake, Aichi 470-1192, Japan
| | | | - Koji Ohashi
- Department of Clinical Biochemistry, Faculty of Medical Technology, Fujita Health University School of Health Sciences, Toyoake, Aichi 470-1192, Japan
| | - Takeyuki Ikeno
- Faculty of Health and Nutrition, Shubun University, Ichinomiya, Aichi 491-0938, Japan
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Li WF, Hao DJ, Fan T, Huang HM, Yao H, Niu XF. Protective effect of chelerythrine against ethanol-induced gastric ulcer in mice. Chem Biol Interact 2013; 208:18-27. [PMID: 24300194 DOI: 10.1016/j.cbi.2013.11.011] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/10/2013] [Accepted: 11/26/2013] [Indexed: 12/20/2022]
Abstract
The quaternary benzo[c]phenanthridine alkaloid, chelerythrine (CHE), is of great practical and research interest because of its pronounced, widespread physiological effects, primarily antimicrobial and anti-inflammatory, arising from its ability to interact with proteins and DNA. Although CHE was originally shown to possess anti-inflammatory properties, its effects on acute gastric ulcer have not been previously explored. The aim of the present study is to evaluate the protective effect of CHE on ethanol induced gastric ulcer in mice. Administration of CHE at doses of 1, 5 and 10mg/kg bodyweight prior to ethanol ingestion dose-dependently inhibited gastric ulcer. The gastric mucosal lesion was assessed by ulcer area, gastric juice acidity, myeloperoxidase (MPO) activities, macroscopic and histopathological examinations. CHE significantly reduced the gastric ulcer index, myeloperoxidase activities, macroscopic and histological score in a dose-dependent manner. In addition, CHE also significantly inhibited nitric oxide (NO) concentration, pro-inflammatory interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) level in serum and gastric mucosal in the mice exposed to ethanol induced ulceration in a dose-dependent manner. In addition, immunohistochemical analysis revealed that CHE markedly attenuated the overexpression of nuclear factor-κB in gastric mucosa of mice. It was concluded that CHE represents a potential therapeutic option to reduce the risk of gastric ulceration. In addition, acute toxicity study revealed no abnormal sign to the mice treated with CHE (15mg/kg). These findings suggest that the gastroprotective activity of CHE might contribute in adjusting the inflammatory cytokine by regulating the NF-κB signalling pathway.
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Affiliation(s)
- Wei-Feng Li
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | | | - Ting Fan
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China; Xi'an Red Cross Hospital, Xi'an 710054, China
| | - Hui-Min Huang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Huan Yao
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiao-Feng Niu
- School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China.
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24
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Protective effect of tetrahydrocoptisine against ethanol-induced gastric ulcer in mice. Toxicol Appl Pharmacol 2013; 272:21-9. [DOI: 10.1016/j.taap.2013.05.035] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/21/2013] [Accepted: 05/29/2013] [Indexed: 01/12/2023]
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25
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Liu Y, Gou L, Fu X, Li S, Lan N, Yin X. Protective effect of rutin against acute gastric mucosal lesions induced by ischemia-reperfusion. PHARMACEUTICAL BIOLOGY 2013; 51:914-919. [PMID: 23627470 DOI: 10.3109/13880209.2013.771375] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
CONTEXT Rutin, a flavonoid commonly present in onions, apples and tea, has been suggested to have a variety of pharmacological activities, including immunomodulator, anti-inflammatory and antioxidant activities. OBJECTIVES The present study was to examine the protective effects of rutin on gastric mucosal damage induced by gastric ischemia-reperfusion (I/R) in rats. MATERIALS AND METHODS Rutin (50, 100, 200 mg/kg) was administered intragastrically for five consecutive days before ischemia. Sixty minutes after the last administration of rutin, under anesthesia, the celiac artery was clamped for 30 min, and then the clamp was removed for 60 min reperfusion. After reperfusion, the stomach was removed for biochemical and histological examinations. RESULTS As compared with the I/R group (116.7 ± 21.5), administration of rutin at doses of 50, 100 and 200 mg/kg significantly prevented the increase of gastric mucosal injury index induced by gastric I/R (73.4 ± 14.8, 65.9 ± 9.6 and 26.9 ± 5.7, respectively). ED50 value was 138.7 mg/kg. Moreover, rutin at doses of 50, 100 and 200 mg/kg showed an inhibition on the increased myeloperoxidase (24.6, 41.3 and 53.1% reduction) activity and malondialdehyde levels (27.4, 40.3 and 50.7% reduction) in gastric mucosa. Also, the elevation of inducible NO synthase (iNOS) activity as well as the decrease of constitutive NO synthase (cNOS) in the gastric mucosa were significantly prevented by rutin pretreatment. CONCLUSION These results suggested that rutin has a protective effect against gastric mucosal injury induced by gastric I/R and that the gastroprotection was related to the NOS/NO pathway and its antioxidant activity.
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Affiliation(s)
- Yi Liu
- School of Pharmacy, Xuzhou Medical College, Jiangsu, China.
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Saranya P, Geetha A, Selvamathy SMKN. A biochemical study on the gastroprotective effect of andrographolide in rats induced with gastric ulcer. Indian J Pharm Sci 2012; 73:550-7. [PMID: 22923868 PMCID: PMC3425067 DOI: 10.4103/0250-474x.99012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 10/15/2011] [Accepted: 10/22/2011] [Indexed: 12/16/2022] Open
Abstract
The major objective of the study was to evaluate the gastroprotective property of andrographolide, a chief component of the leaves of Andrographis paniculata in terms of the ulcer preventive effect in rats. An acute toxicity test was conducted with different concentrations of andrographolide to determine the LD50 value. The dose responsive study was conducted in rats pretreated with andrographolide (1, 3 and 5 mg/kg) for a period of 30 days, prior to ulcer induction by administering ethanol, aspirin or by pyloric ligation. The ulcer protective efficacy was tested by determining the ulcer score, pH, pepsin, titrable acidity, gastric mucin, lipid peroxides, reduced glutathione, and enzymatic antioxidants superoxide dismutase, catalase and glutathione peroxidase in gastric tissue. The activities of H+-K+ ATPase and myeloperoxidase were also determined in gastric tissue. The LD50 value was found to be 48 mg/kg b. wt and the effective dose was found to be 3 mg/kg. We have observed a significant reduction in the ulcer score in rats pretreated with 3 mg of andrographolide/kg body weight. A favourable increase in the pH and decrease in titrable acidity were observed in the gastric fluid of rats pretreated with the test drug. The gastric tissue H+-K+ ATPase and myeloperoxidase activities were elevated in ulcer-induced animals. The elevation in the enzyme activity was significantly minimized in the andrographolide received animals. The antioxidants and mucin levels were significantly maintained in the gastric tissue of drug-pretreated animals. Andrographolide did not produce any toxic effects in normal rats. This study reveals that the ulcer preventive efficacy of andrographolide may probably due to its antioxidant, cytoprotective and antiacid secretory effects.
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Affiliation(s)
- P Saranya
- Department of Biochemistry, Bharathi Women's College (Affiliated to University of Madras), Chennai-600 108, India
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Liu Y, Tian X, Gou L, Fu X, Li S, Lan N, Yin X. Protective effect of l-citrulline against ethanol-induced gastric ulcer in rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:280-287. [PMID: 22634488 DOI: 10.1016/j.etap.2012.04.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 04/20/2012] [Accepted: 04/24/2012] [Indexed: 06/01/2023]
Abstract
We examined the protective effect of l-citrulline on ethanol-induced gastric ulcer in rats. Administration of l-citrulline at doses of 300, 600 and 900mg/kg body weight prior to ethanol ingestion protected the stomach from ulceration. The gastric lesions were significantly attenuated by all doses of l-citrulline as compared to the ethanol group. Pre-treatment with l-citrulline prevented the oxidative damage and the decrease of nitric oxide content as well as the increase of the myeloperoxidase activity. Consequently, significant changes observed included the attenuation in the elevation in total nitric oxide synthase activity and inducible nitric oxide synthase activity as well as the decrease in constitutive nitric oxide synthase activity in the gastric mucosa induced by ethanol. Analysis of serum cytokines of ethanol-induced rats showed a moderate decrease in interleukin-10 with considerable increase of interleukin-6 while l-citrulline inhibited the acute alteration of cytokines. These results suggested the gastroprotective effect of l-citrulline.
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Affiliation(s)
- Yi Liu
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Xia Tian
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Lingshan Gou
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Xiaobin Fu
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Sai Li
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Nuo Lan
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
| | - Xiaoxing Yin
- Department of Pharmacy, Xuzhou Medical College, Jiangsu, China.
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The protective of hydrogen on stress-induced gastric ulceration. Int Immunopharmacol 2012; 13:197-203. [PMID: 22543062 DOI: 10.1016/j.intimp.2012.04.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 03/24/2012] [Accepted: 04/09/2012] [Indexed: 02/08/2023]
Abstract
Stress ulceration frequently occurs as a result of major stressful events and hydroxyl radical (⋅OH) is one of the major causative factors for it. Recently, it has been proved that hydrogen, a potent selectively ⋅OH scavenger, can effectively protect animals against ROS-induced tissue damage. In like manner, we hypothesize that hydrogen may have a protective effect against stress ulceration. Gastric ulceration was induced by the method of cold restraint stress. Rats in the hydrogen treatment group received hydrogen-rich saline (10 mL/kg body weight) 5 min before the stress. At 6h post-stress, gastric corpus mucosa was harvested for the measurement of malondialdehyde, protein carbonyl, 8-hydroxy-desoxyguanosine, glutathione, superoxide dismutase, myeloperoxidase, TNF-α, IL-1β and cytokine-induced neutrophils chemoattractant-1. In addition, western blotting was used to determine the expression of p38 MAPK, P-p38 MAPK, P-JNk, JNK, Bcl-xl, Bax and cleaved caspase-3. Nuclear translocation of NF-κB was assessed by electrophoretic mobility shift assay. Gastric mucosa structure and mucosal epithelial cells apoptosis were measured at 12h post-stress. Our present study showed that hydrogen treatment lessened the stress-induced lipid peroxidation, protein carbonyl and DNA oxidant and improved tissue antioxidant potential. In addition, hydrogen mitigated inflammatory response and neutrophils infiltration with suppressing the activity of P-p38 MAPK, P-JNk and NF-κB. Importantly, hydrogen ameliorated gastric mucosa damage with preventing cell apoptosis. Furthermore, the up-regulation of cleaved caspase-3, Bax and down-regulation of Bcl-xl expression were blocked by hydrogen treatment. In conclusion, hydrogen treatment effectively ameliorated stress-associated gastric mucosa damage via its anti-oxidant, anti-inflammatory and anti-apoptotic effects.
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Mouzaoui S, Rahim I, Djerdjouri B. Aminoguanidine and curcumin attenuated tumor necrosis factor (TNF)-α-induced oxidative stress, colitis and hepatotoxicity in mice. Int Immunopharmacol 2011; 12:302-11. [PMID: 22036766 DOI: 10.1016/j.intimp.2011.10.010] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 10/08/2011] [Accepted: 10/14/2011] [Indexed: 01/02/2023]
Abstract
The up regulation of gut mucosal cytokines such as tumor necrosis factor (TNF)-α and oxidative stress have been related to inflammatory bowel diseases (IBD) such as ulcerative colitis (UC) and Crohn's disease (CD). This study investigated an immune-mediated model of colitis. TNF-α injected intraperitonally to mice induced a dose-dependent recruitment of neutrophils into abdominal mesentery. The leukocytes influx induced by TNF-α (10 μg kg(-1) body weight) increased by 3 fold liver and colon damage scores. TNF-α-colitis was characterized by hemorrhagic edemas and crypt abscesses massively infiltrated by inflammatory cells, namely neutrophils. Moreover, TNF-α-toxicity resulted in liver steatosis and foci of necrosis infiltrated by Kupffer cells and neutrophils in parenchyma and around the centrilobular veins. The involvement of oxidative stress was evaluated using aminoguanidine (AG) as selective inhibitor of inducible NO synthase (iNOS) and curcumin (Cur), the polyphenolic antioxidant of turmeric (Curcuma longa L.). TNF-α-toxicity led to significant increase in myeloperoxidase (MPO, an index of neutrophils infiltration), nitrites (stable nitric oxide metabolites) and malondialdehyde (MDA, a marker of lipid peroxides) levels and cell apoptosis in liver and colon. AG and Cur treatments significantly attenuated the hallmarks of oxidative stress, neutrophils influx and ROS-related cellular and histological damages, in TNF-α-treated mice. Taken together, our results provide insights into the role of phagocytes-derived oxidants in TNF-α-colitis in mice. Cur and AG, by inhibiting neutrophils priming and iNOsynthase could be effective against oxidative bowel damages induced in IBD by imbalanced gut immune response.
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Affiliation(s)
- Souad Mouzaoui
- Faculté des Sciences Biologiques, Laboratoire de Biologie Cellulaire et Moléculaire, Université des Sciences et de la Technologie Houari Boumediene, Alger, Algeria
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Prabha P, Karpagam T, Varalakshmi B, Packiavathy ASC. Indigenous anti-ulcer activity of Musa sapientum on peptic ulcer. Pharmacognosy Res 2011; 3:232-8. [PMID: 22224045 PMCID: PMC3249781 DOI: 10.4103/0974-8490.89742] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/13/2011] [Accepted: 11/15/2011] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Peptic ulcer disease (PUD), encompassing gastric and duodenal ulcers is the most prevalent gastrointestinal disorder. The pathophysiology of PUD involves an imbalance between offensive factors like acid, pepsin and defensive factors like nitric oxide and growth factors. The clinical evaluation of antiulcer drugs showed tolerance, incidence of relapses and side-effects that make their efficacy arguable. An indigenous drug like Musa sapientum possessing fewer side-effects is the major thrust area of present day research, aiming at a better and safer approach for the management of PUD. MATERIAL AND METHODS The unripe plantain bananas (Musa sapientum) were shade-dried, powdered and used for phytochemical analysis and as antiulcer drug. In our present study Group I rats served as control and were treated with saline, Group II was indomethacin-induced ulcerated rats, Group III received aqueous extract of Musa sapientum along with indomethacin and Group IV received esomeprazole along with indomethacin for 21 days. The anti-ulcerogenic activity was investigated by performing hematological, mucosal, antioxidant profile in comparison with the standard drug esomeprazole. RESULTS Our findings from High - Performance Thin Layer Chromatography (HPTLC) analysis showed that Musa sapientum has an active compound a monomeric flavonoid (leucocyanidin) with anti-ulcerogenic activity. Results were expressed as mean ± SD. All our results are in congruous with the results of standard drug esomeprazole. CONCLUSION It could be clearly concluded that administration of the aqueous extract of Musa sapientum at the dose used in this study tends to ameliorate ulcers. Its use in indigenous medicine should be scientifically scrutinized with further research.
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Affiliation(s)
- P. Prabha
- PG and Research Department of Biochemistry, PRIST University, Thanjavur - 614904, India
| | - Thirunethiran Karpagam
- Department of Biochemistry, Shrimati Indira Gandhi College, Tiruchirappalli-620002, Tamilnadu, India
| | - B. Varalakshmi
- Department of Biochemistry, Shrimati Indira Gandhi College, Tiruchirappalli-620002, Tamilnadu, India
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α-Lipoic acid has anti-inflammatory and anti-oxidative properties: an experimental study in rats with carrageenan-induced acute and cotton pellet-induced chronic inflammations. Br J Nutr 2010; 105:31-43. [PMID: 21073761 DOI: 10.1017/s0007114510003107] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
α-Lipoic acid (ALA) has been termed the 'ideal' antioxidant, a readily absorbed and bioavailable compound capable of scavenging a number of free radicals, and it has been used for treating diseases in which oxidative stress plays a major role. The present study was designed to gain a better understanding for the positive effects of ALA on the models of acute and chronic inflammation in rats, and also determine its anti-oxidative potency. In an acute model, three doses of ALA (50, 100 and 200 mg/kg) and one dose of indomethacin (25 mg/kg) or diclofenac (25 mg/kg) were administered to rats by oral administration. The paw volumes of the animals were calculated plethysmometrically, and 0·1 ml of 1 % carrageenan (CAR) was injected into the hind paw of each animal 1 h after oral drug administration. The change in paw volume was detected as five replicates every 60 min by plethysmometry. In particular, we investigated the activities of catalase, superoxide dismutase (SOD), glutathione S-transferase (GST), glutathione peroxidase (GPx), glutathione reductase (GR), inducible NO synthase (iNOS) and myeloperoxidase (MPx), and the amounts of lipid peroxidation (LPO) or total GSH in the paw tissues of CAR-injected rats. We showed that ALA exhibited anti-inflammatory effects on both acute and chronic inflammations, and a strongly anti-oxidative potency on linoleic acid oxidation. Moreover, the administration of CAR induced oedema in the paws. ALA significantly inhibited the ability of CAR to induce: (1) the degree of acute inflammation, (2) the rise in MPx activity, (3) the increases of GST and iNOS activities and the amount of LPO and (4) the decreases of GPx, GR and SOD activities and the amount of GSH. In conclusion, these results suggest that the anti-inflammatory properties of ALA, which has a strong anti-oxidative potency, could be related to its positive effects on the antioxidant system in a variety of tissues in rats.
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Immunohistochemical Localization of Manserin, a Novel Neuropeptide Derived from Secretogranin II, in Rat Adrenal Gland, and its Upregulation by Physical Stress. Int J Pept Res Ther 2010. [DOI: 10.1007/s10989-010-9203-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zavatti M, Corsi L, Zanoli P, Baraldi M. Anti-ulcer activity of IAC, a novel free-radical scavenger, in rats. J Pharm Pharmacol 2010. [DOI: 10.1111/j.2042-7158.2009.tb00433.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Abstract
Objectives
We investigated the ability of a novel low-molecular-weight free-radical scavenger, bis(1-hydroxy-2,2,6,6-tetramethyl-4-piperidinyl)-decandioate (IAC), to protect the gastric mucosa from indometacin-induced ulceration.
Methods
The pharmacological effects of IAC, administered orally or by intraperitoneal injection, on the gastric mucosa were assessed in a rat model of gastric ulceration induced by indometacin. The effect of IAC on the level of prostaglandin PGE2 in the gastric mucosa was also investigated.
Results
IAC, which has no ulcerative activity per se, had a preventive and protective activity against indometacin-induced gastric ulceration. This effect could be only partially attributed to a modulatory effect of IAC on PGE2 levels; it is more likely to be due to the antioxidant activity of the compound.
Conclusions
Taking into account the properties of IAC and the mechanisms underlying gastric inflammation elicited by non-steroidal anti-inflammatory drugs, IAC may represent a novel anti-ulcer agent.
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Affiliation(s)
- Manuela Zavatti
- National InterUniversity Consortium for the Study of Natural Active Principles (CINSPAN), Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Lorenzo Corsi
- National InterUniversity Consortium for the Study of Natural Active Principles (CINSPAN), Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Paola Zanoli
- National InterUniversity Consortium for the Study of Natural Active Principles (CINSPAN), Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Mario Baraldi
- National InterUniversity Consortium for the Study of Natural Active Principles (CINSPAN), Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
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Ohta Y, Imai Y, Kaida S, Kamiya Y, Kawanishi M, Hirata I. Vitamin E protects against stress-induced gastric mucosal lesions in rats more effectively than vitamin C. Biofactors 2010; 36:60-9. [PMID: 20091802 DOI: 10.1002/biof.73] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this study, we examined the protective effects of vitamin E (VE) against gastric mucosal lesions induced by water immersion restraint stress (WIRS) in rats in comparison with that of vitamin C (VC). The gastric mucosa of rats with 6 h of WIRS showed lesions with bleeding, decrease in nonprotein SH, VC, VE, and adherent mucus concentrations and constitutive nitric oxide synthase activity, and increase in lipid peroxide and NOx (nitrite/nitrate) concentrations and myeloperoxidase, xanthine oxidase, and inducible nitric oxide synthase activities. Either VE (0.05 or 0.5 mmol/kg) or VC (0.5 or 1.5 mmol/kg) was orally administered to rats with 6 h of WIRS just before the onset of the stress. Both doses of pre-administered VE prevented gastric mucosal lesion development and attenuated all these changes in gastric mucosal components and enzymes studied, whereas only the higher dose of pre-administered VC suppressed the changes in all parameters studied. These results indicate that orally administered VE protects against WIRS-induced gastric mucosal lesions in rats more effectively than orally administered VC. These results also suggest that the administered VE protects against gastric mucosal lesions in rats with WIRS through its antioxidant and anti-inflammatory actions in the gastric mucosa in the same way as the administered VC.
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Affiliation(s)
- Yoshiji Ohta
- Department of Chemistry, Fujita Health University School of Medicine, Toyoake, Aichi 470-1192, Japan.
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Karakus B, Odabasoglu F, Cakir A, Halici Z, Bayir Y, Halici M, Aslan A, Suleyman H. The effects of methanol extract of Lobaria pulmonaria, a lichen species, on indometacin-induced gastric mucosal damage, oxidative stress and neutrophil infiltration. Phytother Res 2009; 23:635-9. [PMID: 19107853 DOI: 10.1002/ptr.2675] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lobaria pulmonaria, a lichen species, has been used in traditional medicine for the treatment of various diseases. This study was designed to determine the gastroprotective effect of the methanol extract of L. pulmonaria in an indometacin-induced ulcer model in rats. The results showed that gastric lesions were significantly reduced in a dose-dependent manner. Furthermore, the administration of indometacin caused a significant decrease in the levels of superoxide, glutathione peroxidase and reduced glutathione and an increase in the lipid peroxidation level. Administration of the lichen extract, however, produced an increase in the levels of these enzymes and a decrease in lipid peroxidation levels, although catalase and myeloperoxidase levels were unaffected. The present results suggested that Lobaria pulmonaria has a gastroprotective effect, probably due to reducing oxidative stress and neutrophil infiltration.
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Affiliation(s)
- Basak Karakus
- Department of Biochemistry, Faculty of Pharmacy, Ataturk University, Erzurum, Turkey
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Protective Effect of Taurine against Nitrosative Stress in the Stomach of Rat with Water Immersion Restraint Stress. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2009; 643:273-83. [DOI: 10.1007/978-0-387-75681-3_28] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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Stress-induced differences in primary and secondary resistance against bacterial sepsis corresponds with diverse corticotropin releasing hormone receptor expression by pulmonary CD11c+ MHC II+ and CD11c- MHC II+ APCs. Brain Behav Immun 2008; 22:552-64. [PMID: 18166336 PMCID: PMC2849292 DOI: 10.1016/j.bbi.2007.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Revised: 11/05/2007] [Accepted: 11/19/2007] [Indexed: 02/04/2023] Open
Abstract
Stress responses have been associated with altered immunity and depending upon the type of stressor, can have diverse effects on disease outcomes. As the first line of defense against potential pathogens, alterations in cellular immune responses along the respiratory tract can have a significant impact on the manifestation of local and systemic disease. Utilizing a murine model of respiratory pneumonia, the current study investigated the effects of restraint stress on the induction of primary and secondary immunity along the respiratory tract, influencing host susceptibility. Female CD-1 mice were subjected to three hours of restraint stress over a period of four days followed by primary and secondary Streptococcus pneumoniae infection via intranasal route. Stress exposure led to increased retention of bacterial carriage in the lungs, enhanced polymorphonuclear cells and a preferential decrease in pulmonary CD11c(+) MHC II(+) cells resulting in delayed lethality during primary infection but significant impairment of acquired immune protection after secondary infection. We also provide evidence to support a role for lung-associated corticotropin releasing hormone regulation through peripheral CRH and diverse CRH receptor expression by MHC II(+) antigen presenting cells (APCs). We conclude that repeated restraint stress has distinct influences on immune cell populations that appear to be important in the generation of innate and adaptive immune responses along the respiratory tract with the potential to influence local and systemic protection against disease pathogenesis.
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Jia YT, Wei W, Ma B, Xu Y, Liu WJ, Wang Y, Lv KY, Tang HT, Wei D, Xia ZF. Activation of p38 MAPK by reactive oxygen species is essential in a rat model of stress-induced gastric mucosal injury. THE JOURNAL OF IMMUNOLOGY 2008; 179:7808-19. [PMID: 18025227 DOI: 10.4049/jimmunol.179.11.7808] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Stress ulceration is a common complication in critically ill patients and can result in significant upper gastrointestinal bleeding associated with a high morbidity and mortality. At present, little is known of the molecular mechanisms underlying the incidence of this type of gastric damage. In the present study, we investigated the temporal activation of the redox-sensitive p38 signaling transduction cascade and its roles in a well-defined experimental model of cold immobilization stress-induced gastric ulceration. Exposure of Sprague-Dawley rats to 6 h of cold immobilization stress led to a rapid activation of p38 in the gastric mucosa at as early as 15 min after stress, and this activation was maximal after 1.5 h of stress and still persisted until the end of stress. Selectively blocking p38 by pretreatment with SB 239063, a potent and selective p38 inhibitor, suppressed the stress-promoted TNF-alpha, IL-1beta, and CINC-1 production and then prevented the subsequent neutrophil infiltration, gastric mucosal epithelial necrosis and apoptosis, and the ulcerative lesions formation. Prior administration of the free radical scavengers, tempol and N-acetyl-L-cysteine, abolished the stress induction of p38 activation and the resulting mucosal inflammation and gastric injury. These results demonstrate that reactive oxygen species-mediated p38 activation plays an essential role in the pathogenesis of stress-induced gastric inflammatory damage in the rat model of cold immobilization stress. Our findings suggested that inhibition of p38 activation might be a potential strategy for the prophylaxis and treatment of stress ulceration.
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Affiliation(s)
- Yi-Tao Jia
- Burn Institute of Chinese People's Liberation Army and Department of Burn Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
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Gastroprotective effect of leptin in indomethacin-induced gastric injury. J Biomed Sci 2008; 15:405-12. [PMID: 18181030 DOI: 10.1007/s11373-007-9227-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2007] [Accepted: 12/03/2007] [Indexed: 10/22/2022] Open
Abstract
This study investigated the involvement of neutrophil infiltration, disturbances in nitric oxide (NO) generation and oxidative stress in indomethacin-induced gastric ulcer, and the possible gastroprotective potentials of leptin, known for its angiogenic effect. Male Wistar albino rats (180-220 g) were allocated into a normal control group, ulcer control group (received a single dose of indomethacin 40 mg/kg p.o.) and an ulcer group pretreated with leptin (10 microg/kg i.p. 30 min before ulcer induction). The animals were killed 6 h after indomethacin administration and their gastric juice, serum and mucosal tissue were used for gastric injury evaluation. Indomethacin produced multiple lesions in glandular mucosa, evidenced by marked increase in gastric ulcer index (GUI) accompanied by significant increases in gastric juice acidity, tissue myeloperoxidase (MPO) activity, serum NO and tissue conjugated diene (CD), and marked decreases in tissue NO and glutathione (GSH) as well as glutathione reductase (GR) and superoxide dismutase (SOD) activities, while gastric juice mucin and tissue glutathione peroxidase (GPx) were not affected. Leptin exerted significant gastroprotection as evidenced by significantly decreased GUI and attenuated neutrophil infiltration. Leptin significantly increased mucin and tissue NO, restored GR and SOD activities and up-regulated GPx activity. It failed to affect acidity, serum NO, GSH and CD. These results suggest that leptin confers significant gastroprotection against indomethacin-induced injury through interfering with neutrophil infiltration, NO production and oxidative stress.
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Tan R, Bülbül M, Ongüt G, Tosun O, Izgüt-Uysal VN. PROSTAGLANDINS, CAPSAICIN-SENSITIVE SENSORY NERVES AND NEUTROPHIL INFILTRATION, BUT NOT NITRIC OXIDE, CONTRIBUTE TO COLD RESTRAINT STRESS-INDUCED GASTRIC ADAPTATION IN RATS. Clin Exp Pharmacol Physiol 2006; 33:946-51. [PMID: 17002672 DOI: 10.1111/j.1440-1681.2006.04469.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The aim of the present study was to determine the role of prostaglandins (PG), nitric oxide (NO) and capsaicin-sensitive sensory nerves in neutrophil infiltration in gastric adaptation to cold restraint stress in rats. Wistar rats were exposed to single or repeated cold restraint stress for 3.5 h every other day for up to 4 days. Prior to repeated stress, rats were pretreated with NG-nitro-L-arginine methyl ester (L-NAME; 10 mg/kg, s.c.), indomethacin (10 mg/kg, s.c.) or capsaicin (125 mg/kg, s.c.). The extent of gastric mucosal lesions was evaluated histologically and myeloproxidase (MPO) activity, PGE2, NO and calcitonin gene-related peptide (CGRP) levels were measured in gastric tissue. Cold restraint stress produced haemorrhagic lesions and reduced PGE2 and CGRP levels in the stomach, with an increase in MPO activity and NO levels. Repeated stress insults reduced stress-induced gastric damage, NO production and MPO activity, with an increase in PGE2 and CGRP levels compared with rats exposed to single cold restraint stress. Adaptation to cold restraint stress was prevented by indomethacin and capsaicin pretreatment, but not by L-NAME. We conclude that the stomach has the ability to adapt to repeated exposure to cold restraint stress and that the adaptation, via inhibition of neutrophil infiltration, is mediated, at least in part, by endogenous PG and CGRP.
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Affiliation(s)
- Ruken Tan
- Department of Physiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
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Bayir Y, Odabasoglu F, Cakir A, Aslan A, Suleyman H, Halici M, Kazaz C. The inhibition of gastric mucosal lesion, oxidative stress and neutrophil-infiltration in rats by the lichen constituent diffractaic acid. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2006; 13:584-90. [PMID: 16920514 DOI: 10.1016/j.phymed.2005.07.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2004] [Accepted: 07/04/2005] [Indexed: 05/11/2023]
Abstract
The antiulcerogenic effect of diffractaic acid (DA) isolated from Usnea longissima, a lichen species, on indomethacin (IND)-induced gastric lesions was investigated in rats. Administration of 25, 50, 100 and 200 mg/kg doses of DA and ranitidine (RAN) (50 mg/kg dose) reduced the gastric lesions by 43.5%, 52.9%, 91.4%, 96.7% and 72.7%, respectively. It is known that oxidative stress leads to tissue injury in organisms. Thus, in all treated groups of rats, the in vivo activities of the antioxidant enzymes, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and the levels of reduced glutathione (GSH) and lipid peroxidation (LPO) were evaluated. IND caused oxidative stress, which resulted in LPO in tissues, by decreasing the levels of GPx, SOD and GSH as compared to healthy rats. In contrast to IND, the administration of DA and RAN showed a significant decrease in LPO level and an increase in tissue SOD, GPx and GSH levels. However, while CAT activity was significantly increased by the administration of IND, the administration of DA and RAN decreased CAT activity. The administration of IND also increased the myeloperoxidase (MPx) activity, which shows neutrophil infiltration into the gastric mucosal tissues. In contrast to IND, the administration of DA and RAN decreased MPx activity. The changes in activities of gastric mucosal nitric oxide synthases (NOS) throughout the development of gastric mucosal damage induced by IND were also studied. A decrease in constitutive NOS (cNOS) activity and an increase in inducible NOS (iNOS) activity were determined in gastric damaged tissues induced by IND. The administration of DA (100 mg/kg dose) and RAN reversed the activities of iNOS and cNOS. These results suggest that the gastroprotective effect of DA can be attributed to its enhancing effects on antioxidant defense systems as well as reducing effects of neutrophil infiltration.
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Affiliation(s)
- Y Bayir
- Department of Biochemistry, Faculty of Pharmacy, Ataturk University, 25240, Campus, Erzurum, Turkey
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Odabasoglu F, Cakir A, Suleyman H, Aslan A, Bayir Y, Halici M, Kazaz C. Gastroprotective and antioxidant effects of usnic acid on indomethacin-induced gastric ulcer in rats. JOURNAL OF ETHNOPHARMACOLOGY 2006; 103:59-65. [PMID: 16169175 DOI: 10.1016/j.jep.2005.06.043] [Citation(s) in RCA: 158] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Revised: 06/09/2005] [Accepted: 06/20/2005] [Indexed: 05/04/2023]
Abstract
Usnea longissima, a medicinal lichen of Anatolia (Turkey), is used in the treatment of gastric ulcer in local folk medicine. In this paper, the gastroprotective effect of usnic acid (UA) isolated from Usnea longissima was investigated in the indomethacin-induced gastric ulcers in rats at doses of 25, 50, 100 and 200 mg/kg body weight. The gastric lesions were significantly reduced by all doses of UA as compared with the indomethacin (25 mg/kg body weight) treated group. In the stomach tissues of treated animals, the in vivo antioxidant levels were evaluated. The administration of indomethacin caused a significant decrease in the levels of superoxide dismutase (SOD), glutathione peroxidase (GPx) and reduced glutathione (GSH), and an increase in the lipid peroxidation (LPO) level (p < 0.05). The administration of all doses of UA reversed the trend, inducing a significant increase of SOD, GSH and GPx levels and a reduction in LPO level in tissues. However, catalase (CAT), glutathione reductase (GR) and myeloperoxidase (MPx) activities, increased by indomethacin, were found to be lower in the UA- and ranitidine-treated groups. The gastric mucosal constitutive NO synthase (cNOS) and inducible NO synthase (iNOS) activities were also investigated in tissues of UA- (100 mg/kg), ranitidine- (50 mg/kg) and indomethacin-treated rat groups. The administration of UA and ranitidine increased the cNOS activity and lowered the iNOS activity as compared with indomethacin-treated group. These results suggest that the gastroprotective effect of UA can be attributed to its reducing effect on the oxidative damage and neutrophil infiltration in tissues.
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Affiliation(s)
- Fehmi Odabasoglu
- Ataturk University, Faculty of Pharmacy, Department of Biochemistry, Erzurum, Turkey.
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Qui BS, Mei QB, Liu L, Tchou-Wong KM. Effects of nitric oxide on gastric ulceration induced by nicotine and cold-restraint stress. World J Gastroenterol 2004; 10:594-7. [PMID: 14966924 PMCID: PMC4716987 DOI: 10.3748/wjg.v10.i4.594] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
AIM: Stress induces gastric ulceration in human and experimental animals. People tend to smoke more cigarettes when under stress. Nitric oxide (NO) and nicotine have opposing effects on gastric integrity. The present study examined the possible therapeutic benefit of NO in nicotine-treated rats with stress-induced gastric ulceration.
METHODS: Rats drank a nicotine solution while control rats drank tap water for 20 days. The alkoloid was then replaced by water with or without supplementation of isosorbide dinitrate (NO donor) for an additional 10 days. Isosorbide dinitrate was given twice shortly before experiments (acute) or three times daily by oral gavages for 10 days after the rats stopped drinking nicotine solution. At the end of experiments, ulcer index, gastric adhesion mucus content and MPO activity were measured and analysed.
RESULTS: Nicotine treatment decreased gastric mucus content and intensified stress-induced gastric ulcer. A higher ulcer index persisted even after the rats stopped drinking nicotine solution for 10 days. Acute NO donor showed no benefit on both mucus and ulcer index in nicotine treatment or/and stress condition. Chronic NO donor treatment reversed the worsening action of nicotine in stomach. Stress increased gastric mucosal myeloperoxidase (MPO) activity, which was antagonized by chronic NO treatment. However, nicotine was unlikely to change mucosal MPO activity.
CONCLUSION: The intensifying action of nicotine on stress-induced gastric ulceration persists for 10 days after cessation. Nicotine treatment significantly decreases gastric mucus content that can be restored by chronic NO donor treatment. The present study suggests that NO antagonizes the ulcerogenic action of nicotine through a cytoprotective way.
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Affiliation(s)
- Bo-Sheng Qui
- Departments of Medicine, Environmental Medicine, Microbiology, New York University School of Medicine, 550 First Avenue, MSB 141, New York, New York 10016, USA
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Abstract
Nitric oxide (NOz.rad;) is a diatomic mediator liberated on oxidation of L-arginine by the nitric oxide synthase (NOS) family of enzymes. It has complex and wide ranging functions in vivo and has been implicated in the development of the profound inflammatory response that occurs as a result of cutaneous burn injury. In addition, dysregulation of NOS activity has been associated with multiple organ failure in human burn patients and may therefore represent a novel therapeutic target in such circumstances. This review focuses on the role of NOz.rad; in inflammation, with particular emphasis on the acute post-burn inflammatory response. Specific areas of discussion include the maintenance of microvascular haemostasis, leukocyte recruitment and remote organ dysfunction following thermal injury.
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Affiliation(s)
- Andrew Rawlingson
- Centre for Cardiovascular Biology & Medicine, King's College London, Guy's Campus, SE1 1UL, London, UK.
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Rawlingson A, Shendi K, Greenacre SA, England TG, Jenner AM, Poston RN, Halliwell B, Brain SD. Functional significance of inducible nitric oxide synthase induction and protein nitration in the thermally injured cutaneous microvasculature. THE AMERICAN JOURNAL OF PATHOLOGY 2003; 162:1373-80. [PMID: 12651629 PMCID: PMC1851230 DOI: 10.1016/s0002-9440(10)63933-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Increased nitric oxide (NO) production after burn injury is well established. However, there is little information relating to the reactions that occur as a consequence of NO generation under such circumstances. We have investigated the synthesis and function of NO in a rat model of local cutaneous thermal injury. We show that NO levels are elevated from 3 hours after injury with a concomitant increase in protein nitration. A selective inducible nitric oxide synthase (iNOS) inhibitor (1400W) significantly attenuated NO synthesis, protein nitration, and neutrophil accumulation in this model, but had no effect on edema formation. The results also indicate that NO synthesis and protein nitration occurred independently of neutrophil accumulation because these parameters were unaffected by depletion of circulating neutrophils. 3-Chlorotyrosine, a marker of neutrophil/myeloperoxidase-mediated protein damage was significantly increased from 1 hour after burn. Our observations provide evidence for the involvement of reactive species in the inflammatory response after burn. The use of selective iNOS inhibitors may represent a novel approach for the management of human burn injuries.
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Affiliation(s)
- Andrew Rawlingson
- Centre for Cardiovascular Biology and Medicine, King's College London, London, United Kingdom
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46
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Calatayud S, Barrachina D, Esplugues JV. Nitric oxide: relation to integrity, injury, and healing of the gastric mucosa. Microsc Res Tech 2001; 53:325-35. [PMID: 11376493 DOI: 10.1002/jemt.1100] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nitric oxide (NO) plays a multifaceted role in mucosal integrity. The numerous functions of NO and the double-edged role played by NO in most of them provide a great complexity to the NO action. The three enzymatic sources of NO, neuronal NO-synthase (nNOS), endothelial NOS (eNOS), and inducible NOS (iNOS), have been characterised in the gastrointestinal tract. The protective properties of the NO derived from constitutive NO-synthases (eNOS and nNOS) have already been well established. Less clear is the role assigned to iNOS. The simplistic initial view of low levels of NO synthesised by constitutive NOS being protective while exaggerated NO levels after iNOS induction leading irremediably to cytotoxicity is being questioned by new evidence. As initially reported for constitutive NOS, iNOS activity may be associated to reduced leukocyte-endothelium interaction and platelet aggregation as well as protection of mucosal microcirculation. Moreover, iNOS activity may be important to resolve inflammation by increasing apoptosis in inflammatory cells. It is entirely possible that a low level of expression of iNOS will reflect a positive host-defense response to challenge, but that exaggerated or uncontrolled expression of iNOS itself becomes detrimental. There is no doubt about the protective role of NO in physiological conditions. However, when the mucosa is threatened, the role of NO becomes multiple and the final effect will probably depend on the nature of the insult, the environment involved, and the interaction with other mediators.
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Affiliation(s)
- S Calatayud
- Departmento de Farmacología, Facultad de Medicina, Universidad de Valencia, Valencia, Spain
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47
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Ohta Y, Nishida K. Protective effect of L-arginine against stress-induced gastric mucosal lesions in rats and its relation to nitric oxide-mediated inhibition of neutrophil infiltration. Pharmacol Res 2001; 43:535-41. [PMID: 11419962 DOI: 10.1006/phrs.2001.0812] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pretreatment with l -arginine (150-600 mg kg(-1), i.p.), but not d -arginine (600 mg kg(-1), i.p.), protected against gastric mucosal lesions in rats with water immersion restraint stress over a 6-h period. This protective effect occurred in a dose-dependent manner. Increases in the activities of inducible nitric oxide synthase (iNOS) and myeloperoxidase (MPO), an index of tissue neutrophil infiltration, and the concentration of nitrite/nitrate, breakdown products of nitric oxide, and a decrease in the activity of constitutive nitric oxide synthase (cNOS) occurred in the gastric mucosal tissue with the development of gastric mucosal lesions. The l -arginine pretreatment attenuated the increases in iNOS and MPO activities and nitrite/nitrate concentration and the decrease in cNOS activity in the gastric mucosal tissue in a dose-dependent manner, while the d -arginine pretreatment did not. Both the protective effect of l -arginine (300 mg kg(-1)) against stress-induced gastric mucosal lesions and the attenuating effect of the amino acid on the increases in gastric mucosal iNOS and MPO activities and the decrease in gastric mucosal cNOS activity with the lesion development were counteracted by pretreatment with N(G)-monomethyl- l -arginine (100 mg kg(-1), s.c.), a nitric oxide synthase inhibitor, but not its d -isomer (100 mg kg(-1), s.c.). These results suggest that the protective effect of exogenously administered l -arginine against stress-induced gastric mucosal lesions in rats is, at least in part, due to nitric oxide-mediated inhibition of neutrophil infiltration into the gastric mucosal tissue.
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Affiliation(s)
- Y Ohta
- Department of Chemistry, School of Medicine, Fujita Health University, Toyoake, Aichi 470-1192, Japan.
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48
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Nishida K, Ohta Y, Ishiguro I. Modulation of stress-induced gastric mucosal lesions by exogenous L-arginine. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1999; 133:440-50. [PMID: 10235127 DOI: 10.1016/s0022-2143(99)90021-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
L-arginine, a nitric oxide (NO) precursor, can exert both ameriolative and deteriorative effects on gastric mucosal lesions. This study was designed to determine whether exogenous L-arginine modulates stress-induced gastric mucosal lesions through NO production by either constitutive NO synthase (cNOS) or inducible NO synthase (iNOS) in gastric mucosal tissues. In rats subjected to water immersion restraint stress over a 6-hour period, the concentration of gastric mucosal nitrite/nitrate, breakdown products of NO, increased with the development of gastric mucosal lesions and a decrease in cNOS activity and a drastic increase in iNOS activity in the gastric mucosal tissue. Preadministration of L-arginine (150 to 600 mg/kg intraperitoneally) attenuated the lesion development with prevention of increases in gastric mucosal nitrite/nitrate concentration and iNOS activity. In contrast, postadministration of L-arginine (150 to 600 mg/kg intraperitoneally) enhanced the lesion development with further increase in gastric mucosal nitrite/nitrate concentration. This deteriorative action of postadministration of L-arginine (300 mg/kg intraperitoneally) was prevented by pretreatment with aminoguanidine (100 mg/kg subcutaneously), a selective iNOS inhibitor, with inhibition of increases in gastric mucosal iNOS activity and nitrite/nitrate concentration. These results indicate that preadministered L-arginine protects against water immersion restraint stress-induced gastric mucosal lesions, possibly through restricted NO production by cNOS in gastric mucosal tissues, whereas postadministered L-arginine aggravates the stress-induced gastric mucosal lesions, possibly through excessive NO production by iNOS increasing in gastric mucosal tissues.
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Affiliation(s)
- K Nishida
- Department of Biochemistry, School of Medicine, Fujita Health University, Aichi, Japan
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