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Monteiro CEDS, de Cerqueira Fiorio B, Silva FGO, de Fathima Felipe de Souza M, Franco ÁX, Lima MADS, Sales TMAL, Mendes TS, Havt A, Barbosa ALR, Resende ÂC, de Moura RS, de Souza MHLP, Soares PMG. A polyphenol-rich açaí seed extract protects against 5-fluorouracil-induced intestinal mucositis in mice through the TLR-4/MyD88/PI3K/mTOR/NF-κBp65 signaling pathway. Nutr Res 2024; 125:1-15. [PMID: 38428258 DOI: 10.1016/j.nutres.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 03/03/2024]
Abstract
Açaí seed extract (ASE) is obtained from Euterpe oleracea Mart. (açaí) plant (Amazon region) has high nutritional and functional value. ASE is rich in polyphenolic compounds, mainly proanthocyanidins. Proanthocyanidins can modulate the immune system and oxidative stress by inhibiting the toll-like receptor-4 (TLR-4)/myeloid differentiation primary response 88 (MyD88)/nuclear factor-κB (NF-κB) pathway. A great deal of evidence suggests that inflammatory cytokines and oxidative stress contribute to the pathogenesis of intestinal mucositis, and these events can lead to intestinal dysmotility. We hypothesized that ASE acts as an anti-inflammatory and antioxidant compound in intestinal mucositis induced by 5-fluorouracil (5-FU) through modulation of the TLR-4/MyD88/phosphatidylinositol-3-kinase α/mechanistic target of rapamycin/NF-κBp65 pathway. The animals were divided into linear 5-FU (450 mg/kg) and 5-FU + ASE (10, 30, and 100 mg/kg) groups. The weight loss of the animals was evaluated daily. Samples from duodenum, jejunum, and ileum were obtained for histopathological, biochemical, and functional analyses. ASE reduced weight loss, inflammatory parameters (interleukin-1β; tumor necrosis factor-α; myeloperoxidase activity) and the gene expression of mediators involved in the TLR-2/MyD88/NF-κB pathway. ASE prevented histopathological changes with beneficial effects on gastrointestinal transit delay, gastric emptying, and intestinal absorption/permeability. In conclusion, ASE protects the integrity of the intestinal epithelial barrier by inhibiting the TLR/MyD88/PI3K/mechanistic target of rapamycin/NF-κBp65 pathway.
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Affiliation(s)
- Carlos Eduardo da Silva Monteiro
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Bárbara de Cerqueira Fiorio
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Francisca Géssica Oliveira Silva
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Maria de Fathima Felipe de Souza
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Álvaro Xavier Franco
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Marcos Aurélio de Sousa Lima
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Thiago Meneses Araujo Leite Sales
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Tiago Santos Mendes
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Alexandre Havt
- Laboratory of Molecular Toxinology, LTM, Federal University of Ceará, Fortaleza, CE, Brazil
| | - André Luiz Reis Barbosa
- LAFFEX- Laboratory of Experimental Physiopharmacology, Parnaiba Delta Federal University (UFDPAR), Parnaíba, PI, Brazil
| | - Ângela Castro Resende
- Department of Pharmacology, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Roberto Soares de Moura
- Department of Pharmacology, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Pedro Marcos Gomes Soares
- LEFFAG- Laboratory of Physiopharmacology Study of Gastrointestinal Tract, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil.
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Silva RO, Bingana RD, Sales TMAL, Moreira RLR, Costa DVS, Sales KMO, Brito GAC, Santos AA, Souza MÂN, Soares PMG, Sifrim D, Souza MHLP. Role of TRPV1 receptor in inflammation and impairment of esophageal mucosal integrity in a murine model of nonerosive reflux disease. Neurogastroenterol Motil 2018; 30:e13340. [PMID: 29573069 DOI: 10.1111/nmo.13340] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 02/15/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Microscopic inflammation and impairment of the esophageal epithelial barrier are considered relevant for perception of symptoms in patients with nonerosive reflux disease (NERD). In these patients, the receptor transient receptor potential vanilloid 1 (TRPV1) is overexpressed in the esophageal mucosa, but its role is not yet fully understood. We evaluated the role of TRPV1 in esophageal inflammation and mucosal barrier impairment in a murine model of NERD. METHODS Nonerosive reflux disease was surgically induced in Swiss mice by pyloric substenosis and ligature of the gastric fundus, and the mice were killed 7 days post surgery. The experimental groups were: I, sham surgery (negative control); II, NERD untreated; III and IV, NERD + SB366791 or capsazepine (TRPV1 antagonists); and V, NERD + resiniferatoxin (for long-term desensitization of TRPV1). The esophagus was collected for western blotting and histopathology and for evaluation of wet weight, myeloperoxidase (MPO), keratinocyte-derived chemokine (KC), transepithelial electrical resistance (TEER), and basal permeability to fluorescein. KEY RESULTS Compared to sham, NERD mice had increased esophageal wet weight and MPO and KC levels. The mucosa had no ulcers but exhibited inflammation. NERD mice showed mucosal TRPV1 overexpression, a more pronounced decrease in TEER at pH 0.5 (containing pepsin and taurodeoxycholic acid), and increased basal permeability. Pharmacological modulation of TRPV1 prevented esophageal inflammation development, TEER changes by acidic exposure, and increase in esophageal permeability. CONCLUSIONS & INFERENCES The TRPV1 receptor has a critical role in esophageal inflammation and mucosal barrier impairment in NERD mice, suggesting that TRPV1 might be a pharmacological target in patients with NERD.
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Affiliation(s)
- R O Silva
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - R D Bingana
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - T M A L Sales
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - R L R Moreira
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - D V S Costa
- Department of Morphology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - K M O Sales
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - G A C Brito
- Department of Morphology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - A A Santos
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - M Â N Souza
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - P M G Soares
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Department of Morphology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - D Sifrim
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - M H L P Souza
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
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