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Loureiro AV, Moura-Neto LI, Martins CS, Silva PIM, Lopes MB, Leitão RFC, Coelho-Aguiar JM, Moura-Neto V, Warren CA, Costa DV, Brito GAC. Role of Pannexin-1-P2X7R signaling on cell death and pro-inflammatory mediator expression induced by Clostridioides difficile toxins in enteric glia. Front Immunol 2022; 13:956340. [PMID: 36072579 PMCID: PMC9442043 DOI: 10.3389/fimmu.2022.956340] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
Clostridioides difficile (C. difficile) produces toxins A (TcdA) and B (TcdB), both associated with intestinal damage and diarrhea. Pannexin-1 (Panx1) channels allows the passage of messenger molecules, such as adenosine triphosphate (ATP), which in turn activate the P2X7 receptors (P2X7R) that regulate inflammation and cell death in inflammatory bowel diseases. The aim of this study was to verify the effect of C. difficile infection (CDI) in the expression of Panx1 and P2X7R in intestinal tissues of mice, as well as their role in cell death and IL-6 expression induced by TcdA and TcdB in enteric glial cells (EGCs). Male C57BL/6 mice (8 weeks of age) were infected with C. difficile VPI10463, and the control group received only vehicle per gavage. After three days post-infection (p.i.), cecum and colon samples were collected to evaluate the expression of Panx1 by immunohistochemistry. In vitro, EGCs (PK060399egfr) were challenged with TcdA or TcdB, in the presence or absence of the Panx1 inhibitor (10Panx trifluoroacetate) or P2X7R antagonist (A438079), and Panx1 and P2X7R expression, caspase-3/7 activity and phosphatidylserine binding to annexin-V, as well as IL-6 expression were assessed. CDI increased the levels of Panx1 in cecum and colon of mice compared to the control group. Panx1 inhibitor decreased caspase-3/7 activity and phosphatidylserine-annexin-V binding, but not IL-6 gene expression in TcdA and TcdB-challenged EGCs. P2X7 receptor antagonist accentually reduced caspase-3/7 activity, phosphatidylserine-annexin-V binding, and IL-6 gene expression in TcdA and TcdB-challenged EGCs. In conclusion, Panx1 is increased during CDI and plays an important role in the effects of C. difficile toxins in EGCs, participating in cell death induced by both toxins by promoting caspase-3/7 activation via P2X7R, which is also involved in IL-6 expression induced by both toxins.
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Affiliation(s)
- Andrea V. Loureiro
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Lauro I. Moura-Neto
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Conceição S. Martins
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Pedro I. M. Silva
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Matheus B.S. Lopes
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Renata F. C. Leitão
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Juliana M. Coelho-Aguiar
- Paulo Niemeyer Brain Institute, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vivaldo Moura-Neto
- Paulo Niemeyer Brain Institute, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cirle A. Warren
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, United States
| | - Deiziane V.S. Costa
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, United States
- *Correspondence: Gerly A. C. Brito, ; Deiziane V.S. Costa,
| | - Gerly A. C. Brito
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
- *Correspondence: Gerly A. C. Brito, ; Deiziane V.S. Costa,
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Loureiro AV, Barbosa MLL, Morais MLGS, Souza IP, Terceiro LS, Martins CS, Sousa APR, Leitão RFC, Shin JH, Warren CA, Costa DVS, Brito GAC. Host and Clostridioides difficile-Response Modulated by Micronutrients and Glutamine: An Overview. Front Nutr 2022; 9:849301. [PMID: 35795588 PMCID: PMC9251358 DOI: 10.3389/fnut.2022.849301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 05/16/2022] [Indexed: 11/17/2022] Open
Abstract
Changes in intestinal microbiota are integral to development of Clostridioides difficile (C. difficile)—associated nosocomial diarrhea. Certain diets, especially Western diets, increase susceptibility to C. difficile infection (CDI). Here, we discuss recent findings regarding how nutrients modulate response of the host and C. difficile during infection. Calcium has a role in the sporulation and germination process. Selenium is effective in reducing the total amount of C. difficile toxin A (TcdA) and toxin B (TcdB) and in decreasing its cytotoxicity. In addition, selenium phosphate synthetase deficiency reduces C. difficile growth and spore production. On the other hand, iron has a dual role in C. difficile growth. For instance, high intracellular levels can generate reactive hydroxyl radicals, whereas low levels can reduce its growth. In humans, zinc deficiency appears to be related to the recurrence of CDI, in contrast, in the CDI model in mice a diet rich in zinc increased the toxin's activity. Low vitamin D levels contribute to C. difficile colonization, toxin production, and inflammation. Furthermore, glutamine appears to protect intestinal epithelial cells from the deleterious effects of TcdA and TcdB. In conclusion, nutrients play an important role in modulating host and pathogen response. However, further studies are needed to better understand the mechanisms and address some controversies.
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Affiliation(s)
- Andréa V. Loureiro
- Department of Medical Sciences, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Maria L. L. Barbosa
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Maria L. G. S. Morais
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Ismael P. Souza
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Letícia S. Terceiro
- Department of Medical Sciences, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Conceição S. Martins
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Arkila P. R. Sousa
- Department of Pharmacology and Physiology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Renata F. C. Leitão
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Jae H. Shin
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, VA, United States
| | - Cirle A. Warren
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, VA, United States
| | - Deiziane V. S. Costa
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, VA, United States
| | - Gerly A. C. Brito
- Department of Medical Sciences, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
- Department of Pharmacology and Physiology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
- *Correspondence: Gerly A. C. Brito
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Rangel GFP, Ramos MV, Carmo LDD, Rabelo LMA, Silva AAV, de Sousa TFG, Lima Júnior RCP, Wong DVT, Leitão RFC, Magalhães PJC, Sousa BF, Frederico MJS, Alencar NMN. Successful pre-clinical management of irinotecan-debilitated animals: A protein-based accessory phytomedicine. Anticancer Agents Med Chem 2022; 22:3163-3171. [PMID: 35692152 DOI: 10.2174/1871520622666220610115617] [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: 01/18/2022] [Revised: 03/24/2022] [Accepted: 04/05/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Calotropis procera is a laticiferous plant (Apocynaceae) found in tropical regions all over the world. The ultrastructural characteristics of laticifers, their restricted distribution among different taxonomic groups and in some species in each clade, as peptidases from latex, make them very attractive for biological analysis. OBJECTIVE To investigate the effects of LP-PII-IAA (laticifer protein (LP) sub-fraction II (PII) of C. procera presenting an iodoacetamide-inhibited cysteine proteinase activity) on irinotecan-induced intestinal mucositis, a serious adverse effect of this medicine for the treatment of cancer. RESULTS LP-PII-IAA is composed of closely related isoforms (90%) of peptidases deprived from catalysis and an osmotin protein (5%). Animals receiving co-administration of LP-PII-IAA presented a significant decrease in mortality, absence of diarrhea, histological preservation and normalization of intestinal functions. Clinical homeostasis was accompanied by a reduction in MPO activity and declined levels of IL-1β, IL-6 and KC while IL-10 level increased in LP-PII-IAA-treated animals. COX-2 and NF-kB immunostaining was reduced and the level of oxidative markers (GSH, MDA) were normalized in animals that received LP-PII-IAA. CONCLUSION We suggest that peptidases from the latex of Calotropis procera were instrumental for the suppression of the adverse clinical and physiological effects of irinotecan.
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Affiliation(s)
- Gisele F P Rangel
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Márcio V Ramos
- Departamento de Bioquímica e Biologia Molecular, Federal University of Ceara, Campus do Pici. Fortaleza, Ceará, Brazil
| | - Luana D do Carmo
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Liviane M A Rabelo
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Alfredo A V Silva
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Tamiris F G de Sousa
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Roberto C P Lima Júnior
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Deysi V T Wong
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Renata F C Leitão
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Pedro J C Magalhães
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Brandon F Sousa
- Departamento de Bioquímica e Biologia Molecular, Federal University of Ceara, Campus do Pici. Fortaleza, Ceará, Brazil
| | - Marisa J S Frederico
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
| | - Nylane M N Alencar
- Departamento de Fisiologia e Farmacologia, Federal University of Ceara, Campus do Porangabuçú. Fortaleza, Ceará, Brazil
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Ramos MV, Freitas APF, Leitão RFC, Costa DVS, Cerqueira GS, Martins DS, Martins CS, Alencar NMN, Freitas LBN, Brito GAC. Anti-inflammatory latex proteins of the medicinal plant Calotropis procera: a promising alternative for oral mucositis treatment. Inflamm Res 2020; 69:951-966. [PMID: 32488316 DOI: 10.1007/s00011-020-01365-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 08/30/2019] [Revised: 02/21/2020] [Accepted: 05/20/2020] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE AND DESIGN Oral mucositis (OM) is an intense inflammatory reaction progressing to tissue damage and ulceration. The medicinal uses of Calotropis procera are supported by anti-inflammatory capacity. PII-IAA, a highly homogenous cocktail of laticifer proteins (LP) prepared from the latex of C. procera, with recognized pharmacological properties was tested to treat OM. MATERIALS AND SUBJECTS Male Golden Sirius hamsters were used in all treatments. TREATMENT The latex protein samples were injected i.p. (5 mg/Kg) 24 h before mucositis induction (mechanical trauma) and 24 h later. METHODS Histology, cytokine measurements [ELISA], and macroscopic evaluation [scores] were performed. RESULTS PII-IAA eliminated OM, accompanied by total disappearance of myeloperoxidase activity and release of IL-1b, as well as reduced TNF-a. Oxidative stress was relieved by PII-IAA treatment, as revealed by MDA and GSH measurements. PII-IAA also reduced the expression of adhesion molecules (ICAM-1) and Iba-1, two important markers of inflammation, indicating modulatory effects. Histological analyses of the cheek epithelium revealed greater deposition of type I collagen fibers in animals given PII-IAA compared with the control group. This performance was only reached when LPPII was treated with iodoacetamide (IAA), an irreversible inhibitor of proteolytic activity of cysteine proteases. The endogenous proteolytic activity of LPPII induced adverse effects in animals. Candidate proteins involved in the phytomodulatory activity are proposed. CONCLUSIONS Therapy was successful in treating OM with the laticifer protein fraction, containing peptidases and osmotin, from Calotropis procera. The effective candidate from the latex proteins for therapeutic use is PII-IAA.
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Affiliation(s)
- Márcio V Ramos
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
| | - Ana Paula F Freitas
- Universidade da Integração Internacional da Lusofonia Afro-Brasileira (UNILAB), Redenção, Ceará, Brazil
| | - Renata F C Leitão
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Deiziane V S Costa
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Gilberto S Cerqueira
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Dainesy S Martins
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Conceição S Martins
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Nylane M N Alencar
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Larissa Barbosa N Freitas
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Gerly Anne C Brito
- Departamento de Morfologia, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
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Bomfin LE, Braga CM, Oliveira TA, Martins CS, Foschetti DA, Santos AAQA, Costa DVS, Leitão RFC, Brito GAC. 5-Fluorouracil induces inflammation and oxidative stress in the major salivary glands affecting salivary flow and saliva composition. Biochem Pharmacol 2017; 145:34-45. [PMID: 28867645 DOI: 10.1016/j.bcp.2017.08.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 05/05/2017] [Accepted: 08/30/2017] [Indexed: 01/12/2023]
Abstract
This study aimed to elucidate the effect of 5-fluorouracil (5-FU) on the histological aspects of the major salivary glands, salivary flow and saliva composition using an established oral mucositis model in hamsters. Oral mucositis was induced by two intraperitoneal administrations of 5-FU in two consecutive days (60 and 40mg/kg), followed by cheek pouch mucosa scratch, on day 4. The Pilocarpine-stimulated salivary flow was measured 4 and 10days after the first 5-FU injection. Salivary glands were harvested for histopathological analysis, measurement of inflammatory cells, quantification of pro-inflammatory cytokines (TNF-α and IL-1β), investigation of cell death and cell proliferation. Oxidative stress and oxidative defense system were also investigated in the salivary gland tissues using MDA (malondialdehyde), nitrite, non-protein sulfhydryl groups (NP-SH), SOD (superoxide dismutase) and CAT (catalase). In addition, the CAT and lysozyme activities and the IgA and SOD levels were evaluated in the saliva samples. 5-FU significantly reduced the pilocarpine-stimulated salivary flow rate on the 4th experimental day, associated with an increase in the SOD levels in saliva. Recovery of the salivary flow and SOD were observed on day 10, when an increase in the saliva lysozyme levels was detected. In addition, 5-FU promoted vacuolization in parotid (P) and periductal edema in submandibular (SM) gland, combined with an increase in the inflammatory cells influx, mostly observed on the 4th day in SM gland and on 4th and 10th days in P. Oxidative stress was found mostly on day 10 in SM, SL and P glands, associated with release of proinflammatory cytokines, observed in SM and SL glands, but not in P. 5-FU induces an inflammatory response in the major salivary glands, most observed ten days after its first injection, which may contribute to the major salivary glands hypofunction, leading to alterations in the salivary flow rate and composition.
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Affiliation(s)
- Luana E Bomfin
- Department of Medical Sciences, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Cíntia M Braga
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Thais A Oliveira
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Conceição S Martins
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Danielle A Foschetti
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Ana A Q A Santos
- Department of Medical Sciences, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Deiziane V S Costa
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Renata F C Leitão
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Gerly A C Brito
- Department of Medical Sciences, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil; Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil; Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil.
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Nogueira LT, Costa DVS, Gomes AS, Martins CS, Silva AMHP, Coelho-Aguiar JM, Castelucci P, Lima-Júnior RCP, Leitão RFC, Moura-Neto V, Brito GAC. The involvement of mast cells in the irinotecan-induced enteric neurons loss and reactive gliosis. J Neuroinflammation 2017; 14:79. [PMID: 28388962 PMCID: PMC5384042 DOI: 10.1186/s12974-017-0854-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Accepted: 03/27/2017] [Indexed: 02/06/2023] Open
Abstract
Background The irinotecan (CPT-11) causes intestinal mucositis and diarrhea that may be related to changes in the enteric nervous system (ENS). In inflammatory condition, mast cells release a variety of pro-inflammatory mediators that can interact with the ENS cells. It has not been explored whether CPT-11 is able to alter the enteric glial and neuronal cell, and the role of mast cells in this effect. Therefore, this study was conducted to investigate the effect of CPT-11 on the enteric glial and neuronal cells, as well as to study the role of mast cells in the CPT-11-induced intestinal mucositis. Methods Intestinal mucositis was induced in Swiss mice by the injection of CPT-11 (60 mg/kg, i.p.) once a day for 4 days following by euthanasia on the fifth day. To investigate the role of mast cells, the mice were pretreated with compound 48/80 for 4 days (first day, 0.6 mg/kg; second day, 1.0 mg/kg; third day, 1.2 mg/kg; fourth day, 2.4 mg/kg) to induce mast cell degranulation before the CPT-11 treatment. Results Here, we show that CPT-11 increased glial fibrillary acidic protein (GFAP) and S100β gene and S100β protein expressions and decreased HuC/D protein expression in the small intestine segments. Concomitantly, CPT-11 enhanced tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) levels and inducible nitric oxide synthase (iNOS) gene expression, associated with an increase in the total number macrophages (positive cells for ionized calcium-binding adapter molecule, Iba-1) and degranulated mast cells in the small intestine segments and caused significant weight loss. The pretreatment with compound 48/80, an inductor of mast cells degranulation, significantly prevented these CPT-11-induced effects. Conclusions Our data suggests the participation of mast cells on the CPT-11-induced intestinal mucositis, macrophages activation, enteric reactive gliosis, and neuron loss. Electronic supplementary material The online version of this article (doi:10.1186/s12974-017-0854-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ludmila T Nogueira
- Department of Morphology, Federal University of Piauí, Teresina, Piauí, Brazil
| | - Deiziane V S Costa
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil
| | - Antoniella S Gomes
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil
| | - Conceição S Martins
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil
| | - Angeline M H P Silva
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil
| | - Juliana M Coelho-Aguiar
- Paulo Niemeyer Brain Institute, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, RJ, Brazil
| | | | - Roberto C P Lima-Júnior
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Renata F C Leitão
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil
| | - Vivaldo Moura-Neto
- Paulo Niemeyer Brain Institute, Federal University of Rio de Janeiro, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Gerly A C Brito
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Farias Delmiro street, Fortaleza, CE, 60430170, Brazil.
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7
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Martins CS, Leitão RFC, Costa DVS, Melo IM, Santos GS, Lima V, Baldim V, Wong DVT, Bonfim LE, Melo CB, de Oliveira MG, Brito GAC. Correction: Topical HPMC/S-Nitrosoglutathione Solution Decreases Inflammation and Bone Resorption in Experimental Periodontal Disease in Rats. PLoS One 2016; 11:e0156356. [PMID: 27195775 PMCID: PMC4873148 DOI: 10.1371/journal.pone.0156356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
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8
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Martins CS, Leitão RFC, Costa DVS, Melo IM, Santos GS, Lima V, Baldim V, Wong DVT, Bonfim LE, Melo CB, G. de Oliveira M, Brito GAC. Topical HPMC/S-Nitrosoglutathione Solution Decreases Inflammation and Bone Resorption in Experimental Periodontal Disease in Rats. PLoS One 2016; 11:e0153716. [PMID: 27116554 PMCID: PMC4846037 DOI: 10.1371/journal.pone.0153716] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 04/01/2016] [Indexed: 02/07/2023] Open
Abstract
S-nitrosoglutathione (GSNO) is a nitric oxide (NO) donor, which exerts antioxidant, anti-inflammatory, and microbicidal actions. Intragingival application of GSNO was already shown to decrease alveolar bone loss, inflammation and oxidative stress in an experimental periodontal disease (EPD) model. In the present study, we evaluated the potential therapeutic effect of topical applications of hydroxypropylmethylcellulose (HPMC)/GSNO solutions on EPD in Wistar rats. EPD was induced by placing a sterilized nylon (3.0) thread ligature around the cervix of the second left upper molar of the animals, which received topical applications of a HPMC solutions containing GSNO 2 or 10 mM or vehicle (HPMC solution), 1 h prior to the placement of the ligature and then twice daily until sacrifice on day 11. Treatment with HPMC/GSNO 10 mM solution significantly reduced alveolar bone loss, oxidative stress and TNF-α e IL-1β levels in the surrounding gingival tissue, and led to a decreased transcription of RANK and TNF-α genes and elevated bone alkaline phosphatase, compared to the HPMC group. In conclusion, topical application of HPMC/GSNO solution is a potential treatment to reduce inflammation and bone loss in periodontal disease.
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Affiliation(s)
- Conceição S. Martins
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Renata F. C. Leitão
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Deiziane V. S. Costa
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Iracema M. Melo
- Department of Clinical Dentistry, Faculty of Pharmacy, Dentistry and Nursing, School of Dentistry. Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Glaylton S. Santos
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Vilma Lima
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Victor Baldim
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
| | - Deysi V. T. Wong
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Luana E. Bonfim
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Cíntia B. Melo
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marcelo G. de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, São Paulo, Brazil
- * E-mail: (MGO); (GACB)
| | - Gerly A. C. Brito
- Postgraduate Program in Morphofunctional Sciences, Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
- * E-mail: (MGO); (GACB)
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Skeff MA, Brito GAC, de Oliveira MG, Braga CM, Cavalcante MM, Baldim V, Holanda-Afonso RC, Silva-Boghossian CM, Colombo AP, Ribeiro RA, Moura-Neto V, Leitão RFC. S-nitrosoglutathione accelerates recovery from 5-fluorouracil-induced oral mucositis. PLoS One 2014; 9:e113378. [PMID: 25478918 PMCID: PMC4257535 DOI: 10.1371/journal.pone.0113378] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 10/16/2014] [Indexed: 11/19/2022] Open
Abstract
Introduction Mucositis induced by anti-neoplastic drugs is an important, dose-limiting and costly side-effect of cancer therapy. Aim To evaluate the effect of the topical application of S-nitrosoglutathione (GSNO), a nitric oxide donor, on 5-fluorouracil (5-FU)-induced oral mucositis in hamsters. Materials and Methods Oral mucositis was induced in male hamsters by two intraperitoneal administrations of 5-FU on the first and second days of the experiment (60 and 40 mg/kg, respectively) followed by mechanical trauma on the fourth day. Animals received saline, HPMC or HPMC/GSNO (0.1, 0.5 or 2.0 mM) 1 h prior to the 5-FU injection and twice a day for 10 or 14 days. Samples of cheek pouches were harvested for: histopathological analysis, TNF-α and IL-1β levels, immunohistochemical staining for iNOS, TNF-α, IL-1β, Ki67 and TGF-β RII and a TUNEL assay. The presence and levels of 39 bacterial taxa were analyzed using the Checkerboard DNA-DNA hybridization method. The profiles of NO released from the HPMC/GSNO formulations were characterized using chemiluminescence. Results The HPMC/GSNO formulations were found to provide sustained release of NO for more than 4 h at concentration-dependent rates of 14 to 80 nmol/mL/h. Treatment with HPMC/GSNO (0.5 mM) significantly reduced mucosal damage, inflammatory alterations and cell death associated with 5-FU-induced oral mucositis on day 14 but not on day 10. HPMC/GSNO administration also reversed the inhibitory effect of 5-FU on cell proliferation on day 14. In addition, we observed that the chemotherapy significantly increased the levels and/or prevalence of several bacterial species. Conclusion Topical HPMC/GSNO accelerates mucosal recovery, reduces inflammatory parameters, speeds up re-epithelization and decreases levels of periodontopathic species in mucosal ulcers.
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Affiliation(s)
- Maria Adriana Skeff
- Laboratory of Cell Morphogenesis, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Gerly A. C. Brito
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | - Cintia M. Braga
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Matheus M. Cavalcante
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Victor Baldim
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, SP, Brazil
| | - Rosenilde C. Holanda-Afonso
- Laboratory of Cell Morphogenesis, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Carina M. Silva-Boghossian
- Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Faculty of Dentistry, University of Grande Rio, Duque de Caxias, RJ, Brazil
| | - Ana Paula Colombo
- Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ronaldo A. Ribeiro
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Vivaldo Moura-Neto
- Laboratory of Cell Morphogenesis, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, RJ, Brazil
| | - Renata F. C. Leitão
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
- * E-mail:
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10
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Veríssimo DM, Leitão RFC, Figueiró SD, Góes JC, Lima V, Silveira CO, Brito GAC. Guided bone regeneration produced by new mineralized and reticulated collagen membranes in critical-sized rat calvarial defects. Exp Biol Med (Maywood) 2014; 240:175-84. [PMID: 25245073 DOI: 10.1177/1535370214549518] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to evaluate the bone regenerative effect of glutaraldehyde (GA) cross-linking on mineralized polyanionic collagen membranes in critical-sized defects on rat calvarias. Bone calvarial defects were induced in Wistar rats, which were then divided into five groups: a sham group; a control group, which received a commercial membrane; and GA, 25GA, and 75GA groups, which received one of three different polyanionic collagen membranes mineralized by 0, 25, or 75 hydroxyapatite cycles and then cross-linked by GA. Bone formation was evaluated based on digital radiography and computerized tomography. Histological analyses were performed 4 and 12 weeks after the surgical procedure to observe bone formation, membrane resorption, and fibrous tissue surrounding the membranes. Measurement of myeloperoxidase activity, tumor necrosis factor alpha, and interleukin 1beta production was performed 24 h after surgery. The percentage of new bone formation in the GA, 25GA, and 75GA groups was higher compared with the control and sham groups. In the GA and 25 GA groups, the membranes were still in place and were contained in a thick fibrous capsule after 12 weeks. No significant difference was found among the groups regarding myeloperoxidase activity and interleukin 1beta levels, although the GA, 25GA, and 75GA groups presented decreased levels of tumor necrosis factor alpha compared with the control group. These new GA cross-linked membranes accelerated bone healing of the calvarium defects and did not induce inflammation. In addition, unlike the control membrane, the experimental membranes were not absorbed during the analyzed period, so they may offer advantages in large bone defects where prolonged membrane barrier functions are desirable.
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Affiliation(s)
- Denusa M Veríssimo
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Renata F C Leitão
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Sônia D Figueiró
- Physics Department, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Júlio C Góes
- Physics Department, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Vilma Lima
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Charles O Silveira
- School of Medicine, Federal University of Ceará, Fortaleza 60.430-270, Brazil
| | - Gerly A C Brito
- Department of Morphology, School of Medicine, Federal University of Ceará, Fortaleza 60.430-270, Brazil
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11
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Veríssimo DM, Leitão RFC, Ribeiro RA, Figueiró SD, Sombra ASB, Góes JC, Brito GAC. Polyanionic collagen membranes for guided tissue regeneration: Effect of progressive glutaraldehyde cross-linking on biocompatibility and degradation. Acta Biomater 2010; 6:4011-8. [PMID: 20433958 DOI: 10.1016/j.actbio.2010.04.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 04/18/2010] [Accepted: 04/19/2010] [Indexed: 11/30/2022]
Abstract
The ultimate goal of periodontal therapy is to control periodontal tissue inflammation and to produce predictable regeneration of that part of the periodontium which has been lost as a result of periodontal disease. In guided tissue regeneration membranes function as mechanical barriers, excluding the epithelium and gingival corium from the root surface and allowing regeneration by periodontal ligament cells. This report aims to study the effect of glutaraldehyde (GA) cross-linking on mineralized polyanionic collagen (PAC) membranes by conducting a histological evaluation of the tissue response (biocompatibility) and by assessing the biodegradation of subcutaneous membrane implants in rats. We studied six different samples: a PAC, a PAC mineralized by alternate soaking processes for either 25 or 75 cycles (PAC 25 and PAC 75, respectively) and these films cross-linked by GA. Inflammatory infiltrate, cytokine dosage, fibrosis capsule thickness, metalloproteinase immunohistochemistry and membrane biodegradation after 1, 7, 15 and 30 days were measured. The inflammatory response was found to be more intense in membranes without cross-linking, while the fibrosis capsules became thicker in cross-linked membranes after 30 days. The membranes without cross-linking suffered intense biodegradation, while the membranes with cross-linking remained intact after 30 days. The cross-linking with GA reduced the inflammatory response and prevented degradation of the membranes over the entire course of the observation period. These membranes are thus an attractive option when the production of new bone depends on the prolonged presence of a mechanical barrier.
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Affiliation(s)
- D M Veríssimo
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Brazil
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12
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Medeiros CACX, Leitão RFC, Macedo RN, Barboza DRMM, Gomes AS, Nogueira NAP, Alencar NMN, Ribeiro RA, Brito GAC. Effect of atorvastatin on 5-fluorouracil-induced experimental oral mucositis. Cancer Chemother Pharmacol 2010; 67:1085-100. [PMID: 20661736 DOI: 10.1007/s00280-010-1409-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2010] [Accepted: 07/11/2010] [Indexed: 12/21/2022]
Abstract
PURPOSE Oral mucositis (OM) is a frequent side effect in patients with cancer. We investigate the effect of atorvastatin (ATV), a cholesterol-lowering drug, on OM induced by 5-fluorouracil (5-FU) in hamsters. METHODS OM was induced by the i.p. administration of 5-FU, with excoriations of the cheek pouch mucosa. The animals were pretreated with i.p. ATV 1, 5 or 10 mg/kg or vehicle (saline and 5% (vol/vol) ethanol) 30 min before 5-FU injection and daily for 5 or 10 days. Samples of cheek pouches and main organs were removed for histopathological analysis, determination of TNF-α, IL-1β, nitrite, non-protein sulfhydryl group (NP-SH) levels, myeloperoxidase (MPO) assay and immunohistochemistry for induced nitric oxide synthase (iNOS). Blood was collected for a leukogram analysis of biochemical parameters and analysis of bacteremia. RESULTS ATV at doses of 1 and 5 mg/kg reduced mucosal damage and inflammation, as well as the levels of cytokines, nitrite and myeloperoxidase activity on the 5th and 10th day of OM and immunostaining for iNOS on the 5th day of OM.ATV at 1 mg/kg increased cheek pouch NP-SH when compared to 5-FU groups on the 10th day of OM. The association between ATV 5 mg/kg and 5-FU decreased the survival rate, amplified the leukopenia of animals, increased transaminase serum levels and caused liver lesions. We also detected the presence of Gram-negative bacillus in the blood of 100% of the animals treated with ATV 5 mg/kg + 5-FU. CONCLUSIONS Atorvastatin prevented mucosal damage and inflammation associated with 5-FU-induced OM, but the association of a higher dose of ATV with 5-FU induced hepatotoxicity and amplified leukopenia.
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Affiliation(s)
- C A C X Medeiros
- Department of Biomedical Sciences, State University of Rio Grande do Norte, Mossoró, Brazil
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Leitão RFC, Ribeiro RA, Lira AMS, Silva LR, Bellaguarda EAL, Macedo FDB, Sousa RB, Brito GAC. Glutamine and alanyl-glutamine accelerate the recovery from 5-fluorouracil-induced experimental oral mucositis in hamster. Cancer Chemother Pharmacol 2007; 61:215-22. [PMID: 17426972 DOI: 10.1007/s00280-007-0463-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Accepted: 03/04/2007] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Mucositis induced by anti-neoplastic drugs is an important, dose-limiting and costly side effect of cancer therapy. AIM To evaluate the effect of oral glutamine and alanyl-glutamine, a more stable glutamine derivative, on 5-FU-induced oral mucositis in hamsters. MATERIALS AND METHODS Oral mucositis was induced by two intraperitoneal (i.p) administrations of 5-FU on the first and second days of the experiment (60 and 40 mg/kg, respectively) followed by mechanical trauma on the fourth day in male hamsters. Animals received saline, glutamine or alanyl-glutamine suspension (100 mM) 1 h before the injections of 5-FU and daily until sacrifice, on the 10th or 14th day. Macroscopic and histopathological analyses were evaluated and graded. Tissues from the cheek pouches were harvested for measurement of myeloperoxidase activity and glutathione stores. For investigation of serum concentration of glutamine, blood was obtained by heart puncture from anesthetized animals before sacrifice, on day 10. RESULTS Treatment with glutamine and alanyl-glutamine reduced macroscopic and histological parameters of oral mucositis, and reduced the myeloperoxidase activity on day 14, but not on day 10. The 5-FU-induced oral mucositis significantly decreased the serum glutamine levels as well as the cheek pouch glutathione stores observed on day 10. Glutamine or alanyl-glutamine administration reversed the 5-FU effects, restoring serum glutamine levels and cheek pouch glutathione stores, observed on day 10, but did not prevent oral mucositis on the tenth day. CONCLUSION Glutamine or alanyl-glutamine accelerated the mucosal recovery increasing mucosal tissue glutathione stores, reducing inflammatory parameters and speeding reepithelization.
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Affiliation(s)
- R F C Leitão
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
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14
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Leitão RFC, Ribeiro RA, Bellaguarda EAL, Macedo FDB, Silva LR, Oriá RB, Vale ML, Cunha FQ, Brito GAC. Role of nitric oxide on pathogenesis of 5-fluorouracil induced experimental oral mucositis in hamster. Cancer Chemother Pharmacol 2006; 59:603-12. [PMID: 16944152 DOI: 10.1007/s00280-006-0301-y] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2006] [Accepted: 07/19/2006] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Mucositis induced by antineoplastic drugs is an important, dose-limiting, and costly side effect of cancer therapy. AIM To investigate the role of nitric oxide (NO) on the pathogenesis of 5-fluorouracil (5-FU)-induced oral mucositis. MATERIALS AND METHODS Oral mucositis was induced by two intraperitoneal (i.p) administrations of 5-FU on the first and second days of the experiment (60 and 40 mg/kg, respectively) in male hamsters. Animals were treated subcutaneously with saline (0.4 ml), 1,400 W (1 mg/kg), aminoguanidine (5 or 10 mg/kg) or Nphi-Nitro-L-Arginine Methyl Ester (L-NAME) (5, 10, or 20 mg/kg) 1 h before the injections of 5-FU and daily until sacrifice, on the tenth day. Macroscopic and histopathological analyses were evaluated and graded. Tissues from the cheek pouches were harvested for measurement of myeloperoxidase (MPO) activity, nitrite level, and immunohistochemistry for induced nitric oxide synthase (iNOS). RESULTS Treatment with 1,400 W or aminoguanidine reduced macroscopic and histological parameters of oral mucositis, and reduced the inflammatory cell infiltration as detected by histopathology and by MPO activity. In contrast, the administration of L-NAME did not significantly reverse the inflammatory alterations induced by experimental mucositis. Increased NOS activity, nitrite level and immunostaining for iNOS were detected on the check pouch tissue of animals submitted to 5-FU-induced oral mucositis on the tenth day. CONCLUSION These results suggest an important role of NO produced by iNOS in the pathogenesis of oral mucositis induced by 5-FU.
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Affiliation(s)
- R F C Leitão
- Departamento de Fisiologia e Farmacologia, Faculdade de Medicina da Universidade Federal do Ceará, Rua Cel Nunes de Melo, 1127, 60.430-270 Fortaleza, CE, Brazil
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15
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Carvalho RF, Ribeiro RA, Falcão RA, Lima RC, Leitão RFC, Alcantara C, Souza MHLP, Cunha FQ, Brito GAC. Angiotensin II potentiates inflammatory edema in rats: Role of mast cell degranulation. Eur J Pharmacol 2006; 540:175-82. [PMID: 16716292 DOI: 10.1016/j.ejphar.2006.04.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Revised: 03/27/2006] [Accepted: 04/10/2006] [Indexed: 10/24/2022]
Abstract
The aim of this study was to evaluate the effect of angiotensin II on models of acute inflammation. This study shows that angiotensin II potentiates the carrageenan- and dextran-induced paw edema. The administration of angiotensin II does not change the myeloperoxidase activity, neither the tissue content of interleukin-1 beta and tumor necrosis alpha nor the neutrophil migration to the peritoneal cavity, but induces significant enhancement of mast cell degranulation. The anti-histamine, mepyramine, and the anti-serotonin, metisergyde, reduce the angiotensin II-facilitated dextran-induced edema. Our results suggest that angiotensin II increases the vascular permeability through induction of mast cell degranulation and that this effect is mediated by the angiotensin AT2 receptor, since the angiotensin AT1 receptor antagonist and the angiotensin AT2 receptor agonist potentiated the paw edema.
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Affiliation(s)
- Raquel F Carvalho
- Department of Physiology and Pharmacology of the Federal University of Ceará, Fortaleza, CE, Brazil
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Leitão RFC, Ribeiro RA, Chaves HV, Rocha FAC, Lima V, Brito GAC. Nitric oxide synthase inhibition prevents alveolar bone resorption in experimental periodontitis in rats. J Periodontol 2005; 76:956-63. [PMID: 15948691 DOI: 10.1902/jop.2005.76.6.956] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Periodontitis is the most frequent cause of tooth loss in adults. Nitric oxide (NO) has been linked to bone resorption mechanisms during inflammation processes. The aim of this study was to investigate the effect of NOS (NO synthase) inhibitors in the alveolar bone loss in an experimental periodontitis disease (EPD) model. METHODS Wistar rats were subjected to a ligature placement around the second upper left molars and were sacrificed at 11 days. Alveolar bone loss was evaluated by the sum of distances between the cusp tips and the alveolar bone along the axis of each molar root, subtracting from the contralateral side. Histopathological analysis was based on cell influx, alveolar bone, and cementum integrity. Leukogram was performed at 6 hours and 1, 7, and 11 days after the EPD induction. Groups were treated with the NOS inhibitors, aminoguanidine (AG) (2.5 to 10 mg/kg/d), or L-arginine methyl ester (L-NAME, 5 to 20 mg/kg/d) intraperitoneally (i.p.), 1 hour before the EPD induction and daily for 11 days. Controls received only saline (EPD group). As controls for L-NAME specificity, groups were co-treated with either L-arginine (150 to 600 mg/kg/d) or D-arginine (600 mg/kg/d) and L-NAME (20 mg/kg/d). Different groups were used for morphometric and histopathological analysis. RESULTS Both L-NAME and AG significantly and dose-dependently inhibited the alveolar bone loss as compared to EPD group. L-NAME (20 mg/kg/d) reduced the alveolar bone loss by 50%, whereas AG (5 mg/kg/d) reduced it by 47% compared to EPD. This result was coupled to a significant reduction of cell influx to the periodontium, as well as to the preservation of alveolar bone and cementum, seen at histopathology, for both compounds. The co-administration of L-arginine, but not of D-arginine reversed L-NAME effects. CONCLUSION These data provide evidence that NOS inhibitors prevent inflammatory bone resorption in experimental periodontitis.
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Affiliation(s)
- R F C Leitão
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Ceará, Brazil
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Leitão RFC, Rocha FAC, Chaves HV, Lima V, Cunha FQ, Ribeiro RA, Brito GAC. Locally Applied Isosorbide Decreases Bone Resorption in Experimental Periodontitis in Rats. J Periodontol 2004; 75:1227-32. [PMID: 15515338 DOI: 10.1902/jop.2004.75.9.1227] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The role of nitric oxide (NO) on bone metabolism is controversial, since it can either stimulate bone formation or resorption. We investigated the effect of local administration of the NO donor isosorbide in an experimental periodontal disease model. METHODS Wistar rats were subjected to a ligature placement around the cervix of the right second upper molar and were sacrificed after 11 days. Alveolar bone loss was measured in one quadrant as the sum of the distances between the cuspid tip and the alveolar bone along the axis of each molar root, which was subtracted from the contralateral side, used as unligated control. The semiquantitative histopathological scale of the periodontium was based on cell infiltration and alveolar bone and cementum integrity. Groups were treated with a gel containing 1% or 5% isosorbide applied to the vestibular side of the molar gingiva 1 hour before the placement of the ligature and then twice daily until sacrifice. Controls included one group subjected to periodontitis and no treatment (NT) and another that received the gel containing just the vehicle (V). RESULTS The application of the vehicle gel produced an increase of the alveolar bone resorption, without altering the inflammatory changes, compared to the NT group. The 5% isosorbide produced a significant reduction of the alveolar bone resorption, compared to V and NT. This reduction was confirmed by histological analysis, showing less inflammatory cell infiltration and preservation of the cementum and the alveolar process. CONCLUSION Local application of isosorbide reduces alveolar bone resorption in experimental periodontal disease in rats, suggesting a local anti-inflammatory effect of isosorbide.
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Affiliation(s)
- R F C Leitão
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Ceará, Brazil
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