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Siripruekpong W, Praparatana R, Issarachot O, Wiwattanapatapee R. Simultaneous Delivery of Curcumin and Resveratrol via In Situ Gelling, Raft-Forming, Gastroretentive Formulations. Pharmaceutics 2024; 16:641. [PMID: 38794303 PMCID: PMC11124977 DOI: 10.3390/pharmaceutics16050641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/05/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Curcumin and resveratrol are polyphenolic compounds that have been shown to exhibit synergistic therapeutic properties including anti-inflammatory, anticancer, and antiulcer activities, which may be exploited for the treatment of gastric diseases. However, both compounds have poor aqueous solubility and rapid metabolism, resulting in a low oral bioavailability. In situ gelling, liquid formulations were developed to produce a gastroretentive, raft-forming delivery vehicle to improve bioavailability. Solid dispersions containing a mixture of curcumin and resveratrol with Eudragit® EPO (Cur/Res-SD) were first prepared using solvent evaporation, to improve the solubility and dissolution of the compounds. Solid dispersions of a weight ratio of 1:10 curcumin/resveratrol to Eudragit® EPO were subsequently incorporated into in situ gelling, liquid formulations based on the gelling polymers, sodium alginate (low viscosity and medium viscosity), pectin, and gellan gum, respectively. Calcium carbonate and sodium bicarbonate were included to produce carbon dioxide bubbles in the gel matrix, on exposure to gastric fluid, and to achieve flotation. Moreover, the calcium ions acted as a crosslinking agent for the hydrogels. Optimized formulations floated rapidly (<60 s) in simulated gastric fluid (pH = 1.2) and remained buoyant, resulting in the gradual release of more than 80% of the curcumin and resveratrol content within 8 h. The optimized formulation based on medium-viscosity sodium alginate exhibited enhanced cytotoxic activity toward human gastric adenocarcinoma cell lines (AGS), compared with unformulated curcumin and resveratrol compounds, and increased anti-inflammatory activity against RAW 264.7 macrophage cells compared with the NSAID, indomethacin. These findings demonstrate that in situ gelling, liquid formulations, loaded with a combination of curcumin and resveratrol in the form of solid dispersions, show potential as gastroretentive delivery systems for local and systemic effects.
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Affiliation(s)
- Worrawee Siripruekpong
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand;
- Phytomedicine and Pharmaceutical Biotechnology Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand
| | - Rachanida Praparatana
- Faculty of Medical Technology, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand;
| | - Ousanee Issarachot
- Department of Pharmacy Technician, Faculty of Public Health and Allied Health Sciences, Sirindhorn College of Public Health Trang, Praboromarajchanok Institute, Kantang, Trang 92110, Thailand;
| | - Ruedeekorn Wiwattanapatapee
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand;
- Phytomedicine and Pharmaceutical Biotechnology Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand
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Wang S, Wu D, Wu F, Sun H, Wang X, Meng H, Lin Q, Jin K, Wang F. Prevotella histicola suppresses ferroptosis to mitigate ethanol-induced gastric mucosal lesions in mice. BMC Complement Med Ther 2023; 23:118. [PMID: 37060026 PMCID: PMC10103513 DOI: 10.1186/s12906-023-03946-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 04/04/2023] [Indexed: 04/16/2023] Open
Abstract
BACKGROUND Ethanol-induced gastric mucosal lesions (EGML) is one of the most common digestive disorders for which current therapies have limited outcomes in clinical practice. Prevotella histicola (P. histicola) has shown probiotic efficacy against arthritis, multiple sclerosis and oestrogen deficiency-induced depression in mice; however, its role in EGML remains unclear in spite of its extensive colonisation of the stomach. Ferroptosis, which is characterised by lipid peroxidation, may be involved in EGML. Herein, we aimed to investigate the effects and underlying mechanism of action of P. histicola on EGML in the ferroptosis-dependent pathway. METHODS P. histicola was intragastrically administered for a week, and deferoxamine (DFO), a ferroptosis inhibitor, was intraperitoneally injected prior to oral ethanol administration. The gastric mucosal lesions and ferroptosis were assessed via histopathological examinations, quantitative real-time PCR, Western blot, immunohistochemistry and immunofluorescence. RESULTS P. histicola was originally found to attenuate EGML by reducing histopathological changes and lipid reactive oxygen species (ROS) accumulation. The pro-ferroptotic genes of Transferrin Receptor (TFR1), Solute Carrier Family 39 Member 14 (SLC39A14), Haem Oxygenase-1 (HMOX-1), Acyl-CoA Synthetase Long-chain Family Member 4 (ACSL4), Cyclooxygenase 2 (COX-2) and mitochondrial Voltage-dependent Anion Channels (VDACs) were up-regulated; the anti-ferroptotic System Xc-/Glutathione Peroxidase 4 (GPX4) axis was inhibited after ethanol administration. However, the changes of histopathology and ferroptosis-related parameters induced by ethanol were reversed by DFO. Furthermore, P. histicola treatment significantly downregulated the expression of ACSL4, HMOX-1 and COX-2, as well as TFR1 and SLC39A14, on mRNA or the protein level, while activating the System Xc-/GPX4 axis. CONCLUSIONS We found that P. histicola reduces ferroptosis to attenuate EGML by inhibiting the ACSL4- and VDAC-dependent pro-ferroptotic pathways and activating the anti-ferroptotic System Xc-/GPX4 axis.
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Affiliation(s)
- Sisi Wang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Du Wu
- Hangzhou Wuyunshan Hospital Hangzhou Health Promotion Institution, Hangzhou, China
| | - Fangquan Wu
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Hongxia Sun
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xinyu Wang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Hongbing Meng
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qingqing Lin
- Department of Hemodialysis, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Keke Jin
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China.
| | - Fangyan Wang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, China.
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Superporous hydrogels based on blends of chitosan and polyvinyl alcohol as a carrier for enhanced gastric delivery of resveratrol. Saudi Pharm J 2023; 31:335-347. [PMID: 37026050 PMCID: PMC10071363 DOI: 10.1016/j.jsps.2023.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 01/02/2023] [Indexed: 01/07/2023] Open
Abstract
Resveratrol exhibits a number of pharmacological properties, notably antioxidant, anti-inflammatory and anti-cancer activities which are beneficial for the treatment of gastric diseases. However, the poor aqueous solubility and rapid metabolism are the important limitations in clinical uses. Superporous hydrogels (SPHs) based on chitosan/PVA blends were developed as a carrier for resveratrol solid dispersion (Res_SD) to increase the solubility and achieve sustained drug release in the stomach. The SPHs were prepared by gas forming method using glyoxal and sodium bicarbonate as cross-linking agent and gas generator, respectively. The solid dispersions of resveratrol with PVP-K30 were prepared by solvent evaporation and incorporated into the superporous hydrogels. All formulations showed rapid absorption of simulated gastric fluid and reached the equilibrium swollen state within a few minutes. The water absorption ratio and mechanical strength of SPHs were predominantly affected by the chitosan content, with maximum values at 1400 % and 375 g/cm2, respectively. The Res_SD-loaded SPHs exhibited good floating properties and SEM micrographs revealed a highly interconnected pores structure with size around 150 μm. Resveratrol was efficiently entrapped within the SPHs at levels between 64 and 90 % w/w and efficient drug release was sustained over 12 h dependent on the concentration of chitosan and PVA. The Res_SD-loaded SPHs exhibited slightly less cytotoxic efffect towards AGS cells than pure resveratrol. Furthermore, the formulation showed similar anti-inflammatory activity against RAW 264.7 cells compared with indomethacin.
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Shams SGE, Eissa RG. Amelioration of ethanol-induced gastric ulcer in rats by quercetin: implication of Nrf2/HO1 and HMGB1/TLR4/NF-κB pathways. Heliyon 2022; 8:e11159. [PMID: 36311358 PMCID: PMC9614827 DOI: 10.1016/j.heliyon.2022.e11159] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/01/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Abstract
Gastric ulcer is a serious medical condition that can be developed due to an imbalance in the protective and destructive factors of the gastric system. Available therapies do not provide definite cure, thus, there is an urge to seek for alternative treatments. Quercetin is a natural flavonoid that possesses antioxidant and anti-inflammatory properties. In the current study, the antiulcerogenic effect of quercetin in ethanol-induced gastric ulcer (EI-GU) rat model was compared to Antodine® (a reference drug), to elucidate the potential underlying mechanisms. Quercetin (50 mg/kg) and Antodine® (20 mg/kg) were given orally for one week post ulcer induction by ethanol. EI-GU was associated with downregulation of SOD, CAT, Nrf2 and HO1, and accompanied by upregulation of inflammatory markers (i.e., HMGB1, NF-κB and TNFα) and an increase in Bax/Bcl2 ratio. Administration of quercetin resulted in a significant reduction in gastric volume in the stomach of ulcerative rats by 86% and a significant decrease in gastric lesion count by 3.5- folds, as compared with the ulcerative rats. Moreover, rats treated with quercetin showed upregulation of Nrf2 by 3.3-fold change and in HO1 by 3.5-fold change when compared to ulcerated rats, and decreased HMGB1, TLR4, NF-κB p65 and TNF-α by 50%, 53%, 52.9% and 54.9%, respectively. Treatment of rats with quercetin reduced Bax and Bax/Bcl2 ratio and increased Bcl2 relative to ulcerated rats. Thus, it can be concluded that the ulcerogenic curative properties of quercetin were mediated by antioxidant, anti-inflammatory and antiapoptotic activities.
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Affiliation(s)
| | - Rana G. Eissa
- Biochemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt,Corresponding author.;
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Mazumder S, Bindu S, De R, Debsharma S, Pramanik S, Bandyopadhyay U. Emerging role of mitochondrial DAMPs, aberrant mitochondrial dynamics and anomalous mitophagy in gut mucosal pathogenesis. Life Sci 2022; 305:120753. [PMID: 35787999 DOI: 10.1016/j.lfs.2022.120753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/13/2022] [Accepted: 06/27/2022] [Indexed: 12/22/2022]
Abstract
Gastroduodenal inflammation and ulcerative injuries are increasing due to expanding socio-economic stress, unhealthy food habits-lifestyle, smoking, alcoholism and usage of medicines like non-steroidal anti-inflammatory drugs. In fact, gastrointestinal (GI) complications, associated with the prevailing COVID-19 pandemic, further, poses a challenge to global healthcare towards safeguarding the GI tract. Emerging evidences have discretely identified mitochondrial dysfunctions as common etiological denominators in diseases. However, it is worth realizing that mitochondrial dysfunctions are not just consequences of diseases. Rather, damaged mitochondria severely aggravate the pathogenesis thereby qualifying as perpetrable factors worth of prophylactic and therapeutic targeting. Oxidative and nitrosative stress due to endogenous and exogenous stimuli triggers mitochondrial injury causing production of mitochondrial damage associated molecular patterns (mtDAMPs), which, in a feed-forward loop, inflicts inflammatory tissue damage. Mitochondrial structural dynamics and mitophagy are crucial quality control parameters determining the extent of mitopathology and disease outcomes. Interestingly, apart from endogenous factors, mitochondria also crosstalk and in turn get detrimentally affected by gut pathobionts colonized during luminal dysbiosis. Although mitopathology is documented in various pre-clinical/clinical studies, a comprehensive account appreciating the mitochondrial basis of GI mucosal pathologies is largely lacking. Here we critically discuss the molecular events impinging on mitochondria along with the interplay of mitochondria-derived factors in fueling mucosal pathogenesis. We specifically emphasize on the potential role of aberrant mitochondrial dynamics, anomalous mitophagy, mitochondrial lipoxidation and ferroptosis as emerging regulators of GI mucosal pathogenesis. We finally discuss about the prospect of mitochondrial targeting for next-generation drug discovery against GI disorders.
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Affiliation(s)
- Somnath Mazumder
- Department of Zoology, Raja Peary Mohan College, 1 Acharya Dhruba Pal Road, Uttarpara, West Bengal 712258, India
| | - Samik Bindu
- Department of Zoology, Cooch Behar Panchanan Barma University, Cooch Behar, West Bengal 736101, India
| | - Rudranil De
- Amity Institute of Biotechnology, Amity University, Kolkata, Plot No: 36, 37 & 38, Major Arterial Road, Action Area II, Kadampukur Village, Newtown, Kolkata, West Bengal 700135, India
| | - Subhashis Debsharma
- Division of Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Saikat Pramanik
- Division of Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata, West Bengal 700032, India
| | - Uday Bandyopadhyay
- Division of Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata, West Bengal 700032, India; Division of Molecular Medicine, Bose Institute, EN 80, Sector V, Bidhan Nagar, Kolkata, West Bengal 700091, India.
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do Nascimento RF, de Oliveira Formiga R, Machado FDF, de Sales IRP, de Lima GM, Alves Júnior EB, Vieira GC, Pereira RF, de Araújo AA, de Araújo Junior RF, Barbosa Filho JM, Batista LM. Rosmarinic acid prevents gastric ulcers via sulfhydryl groups reinforcement, antioxidant and immunomodulatory effects. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2020; 393:2265-2278. [PMID: 32642876 DOI: 10.1007/s00210-020-01894-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/01/2020] [Indexed: 02/08/2023]
Abstract
Rosmarinic acid (RA) is a secondary metabolite present in several plant species that has already demonstrated antioxidant, antiallergic, anticancer, antimicrobial, neuroprotective, and hepatoprotective effects experimentally. Due to the promising pharmacological properties found previously, this study aimed to assess the oral acute toxicity and the gastroprotective effect of RA using animal models. Acute toxicity was assessed according to OECD guide 423. Ethanol, stress, NSAIDs, and pylorus ligature-induced gastric ulcer models were used to investigate antiulcer properties. The related mechanisms of action were also evaluated from ethanol-induced gastric lesions protocol. RA (300 and 2000 mg/kg) showed no changes in behavioral, water and food intake, body and organs weight parameters with LD50 set around 2500 mg/kg. RA presented gastroprotective activity in all assessed doses (25, 50, 100, and 200 mg/kg) using different animal models. Besides, it was observed that this effect is not related to the modulation of gastric juice parameters (pH, volume, and [H+]), the participation of nitric oxide, mucus, and prostaglandins. However, increased sulfhydryl groups, GSH and IL-10 levels as well as reduced of proinflammatory cytokine (TNF-α and IL-1β) levels were found for RA-treated groups. RA presents low acute toxicity and gastroprotective activity, preventing ulcer formation via cytoprotective, antioxidant, and anti-inflammatory mechanisms. Graphical abstract.
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Affiliation(s)
- Raphaela Francelino do Nascimento
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Rodrigo de Oliveira Formiga
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Flávia Danielle Frota Machado
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Igor Rafael Praxedes de Sales
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Gedson Moraes de Lima
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Edvaldo Balbino Alves Júnior
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Giciane Carvalho Vieira
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Raquel Fragoso Pereira
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Aurigena Antunes de Araújo
- Department of Biophysics and Pharmacology and Department of Morphology, Histology and Basic Pathology, Bioscience Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Raimundo Fernandes de Araújo Junior
- Department of Biophysics and Pharmacology and Department of Morphology, Histology and Basic Pathology, Bioscience Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - José Maria Barbosa Filho
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil
| | - Leônia Maria Batista
- Natural and Synthetic Bioactive Products Postgraduate Program, Health Sciences Center, Federal University of Paraiba, Paraíba, João Pessoa, PB, Brazil.
- Department of Pharmaceutical Sciences, IPeFarM, Federal University of Paraíba, João Pessoa, PB, 58051-970, Brazil.
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Kim YS, Nam Y, Song J, Kim H. Gastroprotective and Healing Effects of Polygonum cuspidatum Root on Experimentally Induced Gastric Ulcers in Rats. Nutrients 2020; 12:nu12082241. [PMID: 32727104 PMCID: PMC7468921 DOI: 10.3390/nu12082241] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/20/2020] [Accepted: 07/23/2020] [Indexed: 12/22/2022] Open
Abstract
Polygonum cuspidatum is widely used as food and medicine in Korea, China, and Japan. Its major bioactive components, resveratrol and emodin, reportedly protect against gastric lesions. We therefore aimed to investigate: (1) the gastroprotective effects of P. cuspidatum roots in hydrochloric acid/ethanol (HCl/EtOH)- and indomethacin-induced acute gastric ulcer rat models; (2) the healing effects in an acetic acid-induced ulcer model; and (3) potential mechanisms by measuring gastric acid secretion-related parameters in a pyloric ligation-induced ulcer model, and by measuring antioxidant enzyme and prostaglandin E2 levels in the gastric tissue of HCl/EtOH-treated rats. Oral administration of P. cuspidatum extract (PCE) at doses of 100 and 300 mg/kg significantly decreased HCl/EtOH- and indomethacin-induced gastric lesions. PCE at 300 mg/kg significantly reduced gastric lesions in acetic acid-induced ulcers. PCE increased superoxide dismutase (SOD)activity and glutathione(GSH) and prostaglandin E2 levels in gastric tissue, whereas it did not alter gastric acid secretion-related parameters. Our findings indicate that PCE has gastroprotective effects against HCl/EtOH and non-steroidal anti-inflammatory drugs(NSAIDs) and promotes healing of acetic acid-induced ulcers. These gastric mucosal protection and ulcer healing effects are associated with antioxidant effects and the augmentation of prostaglandin E2 and suggest that P. cuspidatum might be a promising preventive and therapeutic agent for treating gastric ulcers.
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Affiliation(s)
| | | | - Jungbin Song
- Correspondence: (J.S.); (H.K.); Tel.: +82-2-961-9394 (J.S.); +82-2-961-0419 (H.K.)
| | - Hocheol Kim
- Correspondence: (J.S.); (H.K.); Tel.: +82-2-961-9394 (J.S.); +82-2-961-0419 (H.K.)
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Farzaei MH, Abdollahi M, Rahimi R. Role of dietary polyphenols in the management of peptic ulcer. World J Gastroenterol 2015; 21:6499-6517. [PMID: 26074689 PMCID: PMC4458761 DOI: 10.3748/wjg.v21.i21.6499] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 02/22/2015] [Accepted: 04/03/2015] [Indexed: 02/06/2023] Open
Abstract
Peptic ulcer disease is a multifactorial and complex disease involving gastric and duodenal ulcers. Despite medical advances, the management of peptic ulcer and its complications remains a challenge, with high morbidity and death rates for the disease. An accumulating body of evidence suggests that, among a broad reach of natural molecules, dietary polyphenols with multiple biological mechanisms of action play a pivotal part in the management of gastric and duodenal ulcers. The current review confirmed that dietary polyphenols possess protective and therapeutic potential in peptic ulcer mediated by: improving cytoprotection, re-epithelialization, neovascularization, and angiogenesis; up-regulating tissue growth factors and prostaglandins; down-regulating anti-angiogenic factors; enhancing endothelial nitric oxide synthase-derived NO; suppressing oxidative mucosal damage; amplifying antioxidant performance, antacid, and anti-secretory activity; increasing endogenous mucosal defensive agents; and blocking Helicobacter pylori colonization associated gastric morphological changes and gastroduodenal inflammation and ulceration. In addition, anti-inflammatory activity due to down-regulation of proinflammatory cytokines and cellular and intercellular adhesion agents, suppressing leukocyte-endothelium interaction, inhibiting nuclear signaling pathways of inflammatory process, and modulating intracellular transduction and transcription pathways have key roles in the anti-ulcer action of dietary polyphenols. In conclusion, administration of a significant amount of dietary polyphenols in the human diet or as part of dietary supplementation along with conventional treatment can result in perfect security and treatment of peptic ulcer. Further well-designed preclinical and clinical tests are recommended in order to recognize higher levels of evidence for the confirmation of bioefficacy and safety of dietary polyphenols in the management of peptic ulcer.
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Cho EJ, An HJ, Shin JS, Choi HE, Ko J, Cho YW, Kim HM, Choi JH, Lee KT. Roxatidine suppresses inflammatory responses via inhibition of NF-κB and p38 MAPK activation in LPS-induced RAW 264.7 macrophages. J Cell Biochem 2011; 112:3648-59. [DOI: 10.1002/jcb.23294] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Alarcón de la Lastra C. Commentary on ‘Resveratrol commonly displays hormesis: Occurrence and biomedical significance’ by Calabrese et al. Hum Exp Toxicol 2010; 29:1021-3. [DOI: 10.1177/0960327110383638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Velioğlu-Oğünç A, Sehirli O, Toklu HZ, Ozyurt H, Mayadağli A, Ekşioğlu-Demiralp E, Erzik C, Cetinel S, Yeğen BC, Sener G. Resveratrol protects against irradiation-induced hepatic and ileal damage via its anti-oxidative activity. Free Radic Res 2010; 43:1060-71. [PMID: 19707923 DOI: 10.1080/10715760903171100] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The present study was undertaken to determine whether resveratrol (RVT) could ameliorate ionizing radiation-induced oxidative injury. After a 10-days pre-treatment with RVT (10 mg/kg/day p.o.), rats were exposed to whole-body IR (800 cGy) and the RVT treatment was continued for 10 more days after the irradiation. Irradiation caused a significant decrease in glutathione level, while malondialdehyde levels, myeloperoxidase activity and collagen content were increased in the liver and ileum tissues. Similarly, plasma lactate dehydrogenase and pro-inflammatory cytokine levels, 8-hydroxy-2'-deoxyguanosine and leukocyte apoptosis were elevated, while antioxidant-capacity was reduced in the irradiated rats as compared with the control group. Furthermore, Na(+), K(+)-ATPase activity was inhibited and DNA fragmentation was increased in the ileal tissues. Resveratrol treatment reversed all these biochemical indices, as well as histopathological alterations induced by irradiation. In conclusion, supplementing cancer patients with adjuvant therapy of resveratrol may have some benefit for a more successful radiotherapy.
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Affiliation(s)
- Ayliz Velioğlu-Oğünç
- Vocational School of Health Related Professions, Marmara University, Istanbul, Turkey
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Toklu HZ, Sehirli O, Erşahin M, Süleymanoğlu S, Yiğiner O, Emekli-Alturfan E, Yarat A, Yeğen BÇ, Sener G. Resveratrol improves cardiovascular function and reduces oxidative organ damage in the renal, cardiovascular and cerebral tissues of two-kidney, one-clip hypertensive rats. J Pharm Pharmacol 2010; 62:1784-93. [PMID: 21054406 DOI: 10.1111/j.2042-7158.2010.01197.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The putative protective effects of resveratrol against oxidative injury in the heart, kidney and brain tissues of rats induced with the two-kidney, one-clip (2K1C) hypertension model were investigated. METHODS Wistar albino rats were divided into sham-operated (n = 8) or 2K1C groups, in which rats received either resveratrol (10 mg/kg per day, i.p., n = 8), or saline (n = 8) starting at Week 3 after the surgery and continuing for the following 6 weeks. Indirect blood pressure recordings and echocardiographic images were made to evaluate cardiac function. At the end of Week 9 the animals were decapitated and plasma, heart, kidney and brain were taken for biochemical assays, while aortic rings were prepared for vascular reactivity studies. KEY FINDINGS 2K1C hypertension resulted in increased blood pressure, aortic hypercontractility and reduced left ventricular function, leading to increased lipid peroxidation and myeloperoxidase activity, concomitant with significant reductions in tissue glutathione, superoxide dismutase, Na+/K+-ATPase and catalase activities in the cardiac, renal and brain tissues, indicating the presence of oxidative tissue damage in peripheral target organs. Elevated plasma levels of lactate dehydrogenase, creatine kinase, as well as reduced plasma levels of antioxidant capacity and nitric oxide further verified the severity of oxidative injury. A 6-week treatment with resveratrol reversed all the measured parameters, ameliorated hypertension-induced oxidative injury in the target organs and improved cardiovascular function. CONCLUSIONS Resveratrol improved cardiovascular function through the augmentation of endogenous antioxidants and the inhibition of lipid peroxidation by maintaining a balance in oxidant/antioxidant status, which also ameliorated hypertension-induced oxidative injury in the cardiac, renal and cerebral tissues.
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Affiliation(s)
- Hale Z Toklu
- Department of Pharmacology, Marmara University School of Pharmacy, Istanbul, Turkey
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