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El-Baz LM, Elaidy SM, Hafez HS, Shoukry NM. Vismodegib, a sonic hedgehog signalling blockade, ameliorates ovalbumin and ovalbumin/lipopolysaccharide-induced airway inflammation and asthma phenotypical models. Life Sci 2022; 310:121119. [DOI: 10.1016/j.lfs.2022.121119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/17/2022] [Accepted: 10/20/2022] [Indexed: 11/09/2022]
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The Plant Proteinase Inhibitor CrataBL Plays a Role in Controlling Asthma Response in Mice. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9274817. [PMID: 30364003 PMCID: PMC6188594 DOI: 10.1155/2018/9274817] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/30/2018] [Accepted: 09/09/2018] [Indexed: 01/08/2023]
Abstract
Background. CrataBL is a protein isolated from Crataeva tapia bark. It has been shown to exhibit several biological properties, including anti-inflammatory, analgesic, antitumor, and insecticidal activities. There are no studies evaluating the role of CrataBL in experimental asthma models. Aim. To evaluate the effects of CrataBL on lung mechanics, inflammation, remodeling, and oxidative stress activation of mice with allergic pulmonary inflammation. Materials and Methods. BALB/c mice (6-7 weeks old, 25-30g) were divided into four groups: nonsensitized and nontreated mice (C group, n=8); ovalbumin- (OVA-) sensitized and nontreated mice (OVA group, n=8); nonsensitized and CrataBL-treated mice (C+CR group, n=8); OVA-sensitized and CrataBL-treated mice (OVA+CR group, n=8). We evaluated hyperresponsiveness to methacholine, bronchoalveolar lavage fluid (BALF), pulmonary inflammation, extracellular matrix remodeling, and oxidative stress markers. Results. CrataBL treatment in OVA-sensitized mice (OVA+CR group) attenuated the following variables compared to OVA-sensitized mice without treatment (OVA group) (all p<0.05): (1) respiratory system resistance (Rrs) and elastance (Ers) after methacholine challenge; (2) total cells, macrophages, polymorphonuclear cells, and lymphocytes in BALF; (3) eosinophils and volume fraction of collagen and elastic fibers in the airway and alveolar wall according to histopathological and morphometry analysis; (4) IL-4-, IL-5-, IL-13-, IL-17-, IFN-γ-, MMP-9-, TIMP-1-, TGF-β-, iNOS-, and NF-kB-positive cells and volume of 8-iso-PGF2α in airway and alveolar septa according to immunohistochemistry; and (5) IL-4, IL-5, and IFN-γ according to an ELISA. Conclusion. CrataBL contributes to the control of hyperresponsiveness, pulmonary inflammation, extracellular matrix remodeling, and oxidative stress responses in an animal model of chronic allergic pulmonary inflammation.
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Doras C, Petak F, Bayat S, Baudat A, Von Garnier C, Eigenmann P, Habre W. Lung responses in murine models of experimental asthma: Value of house dust mite over ovalbumin sensitization. Respir Physiol Neurobiol 2017; 247:43-51. [PMID: 28890402 DOI: 10.1016/j.resp.2017.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 08/08/2017] [Accepted: 09/02/2017] [Indexed: 11/25/2022]
Abstract
Ovalbumin (OVA) sensitization has limitations in modelling asthma. Thus, we examined the value of allergic sensitization using a purified natural allergen, house dust mite (HDM), over the sensitization performed with OVA. Mice were sham-treated, or sensitized with OVA- or HDM with identical chronology. Airway resistance, tissue damping and elastance were assessed under control conditions and after challenging the animals with methacholine (MCh) and the specific allergen. Inflammatory profile of the bronchoalveolar lavage fluid was characterized and lung histology was performed. While no difference in the lung responsiveness to the specific allergen was noted, hyperresponsiveness to MCh was observed only in the HDM-sensitized animals in the lung peripheral parameters. Lung inflammation differed between the models, but excessive bronchial smooth muscle remodelling occurred only with OVA. In conclusion, we demonstrate that a purified natural allergen offers a more relevant murine model of human allergic asthma by expressing the key features of this chronic inflammatory disease both in the lung function and structure.
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Affiliation(s)
- Camille Doras
- Anaesthesiological Investigations Unit, University Hospitals of Geneva, Geneva, Switzerland
| | - Ferenc Petak
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Sam Bayat
- Anaesthesiological Investigations Unit, University Hospitals of Geneva, Geneva, Switzerland
| | - Aurélie Baudat
- Anaesthesiological Investigations Unit, University Hospitals of Geneva, Geneva, Switzerland
| | | | - Philippe Eigenmann
- Department of Paediatrics, University Hospitals of Geneva, Geneva, Switzerland
| | - Walid Habre
- Anaesthesiological Investigations Unit, University Hospitals of Geneva, Geneva, Switzerland.
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Shin JH, Kim DH, Kim BY, Kim SW, Hwang SH, Lee J, Kim SW. Anti-Interleukin-9 Antibody Increases the Effect of Allergen-Specific Immunotherapy in Murine Allergic Rhinitis. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2017; 9:237-246. [PMID: 28293930 PMCID: PMC5352575 DOI: 10.4168/aair.2017.9.3.237] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 10/12/2016] [Accepted: 10/14/2016] [Indexed: 12/21/2022]
Abstract
Purpose Interleukin (IL)-9 induces allergic responses; however, the roles of anti-IL-9 antibody in the induction of tolerance remain unclear. This study investigated the effects of anti-IL-9 antibody on oral tolerance (OT) in a mouse model of allergic rhinitis (AR). Methods BALB/c mice were divided into 4 groups: the control, AR, OT, and OT with anti-IL-9 antibody (OT+IL9AB) groups. Ovalbumin (OVA) was used for sensitization and challenge. Mice in the OT and OT+IL9AB groups were fed OVA for immunotherapy. During immunotherapy, OT+IL9AB mice were injected with anti-IL-9 antibody. Allergic symptoms, tissue eosinophil counts, and serum OVA-specific immunoglobulin E (IgE) were measured. The mRNA expressions of cytokines and transcription factors of T cells of nasal mucosa were determined by real-time polymerase chain reaction (PCR). The protein levels of GATA3, ROR-γt, and Foxp3 in nasal mucosa were determined by Western blot. CD4+CD25+Foxp3+ T cells in the spleen were analyzed by flow cytometry. Results Administration of anti-IL-9 antibody decreased allergic symptoms, OVA-specific IgE levels, and eosinophil counts. In addition, it inhibited T-helper (Th) 2 responses, but had no effect on Th1 responses. Protein levels of ROR-γt and mRNA levels of PU.1 and ROR-γt were reduced by anti-IL-9 antibody. Anti-IL-9 antibody increased Foxp3 and IL-10 mRNA expression, Foxp3 protein, and induction of CD4+CD25+Foxp3+ T cells. Conclusions Anti-IL-9 antibody decreased allergic inflammation through suppression of Th2 and Th17 cells. Anti-IL-9 antibody enhanced the tolerogenic effects of regulatory T cells. These results suggest that anti-IL-9 antibody might represent a potential therapeutic agent for allergen immunotherapy in patients with uncontrolled allergic airway disease.
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Affiliation(s)
- Ji Hyeon Shin
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Do Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Boo Young Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Se Hwan Hwang
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Joohyung Lee
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Soo Whan Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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Pigati PA, Righetti RF, Possa SS, Romanholo BS, Rodrigues APD, dos Santos ASA, Xisto DG, Antunes MA, Prado CM, Leick EA, Martins MDA, Rocco PRM, Tibério IDFLC. Y-27632 is associated with corticosteroid-potentiated control of pulmonary remodeling and inflammation in guinea pigs with chronic allergic inflammation. BMC Pulm Med 2015; 15:85. [PMID: 26264367 PMCID: PMC4531528 DOI: 10.1186/s12890-015-0073-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 07/06/2015] [Indexed: 02/07/2023] Open
Abstract
Background Previously, we showed that treatment with the Rho-kinase inhibitor Y-27632 was able to control airway responsiveness, inflammation, remodeling, and oxidative stress in an animal model of asthma, suggesting that this drug is beneficial in asthma. However, studies evaluating the effects of these inhibitors in conjunction with corticosteroids on chronic pulmonary inflammation have not been conducted. Therefore, we evaluated the effects of treatment with the Rho-kinase inhibitor Y-27632, with or without concurrent dexamethasone treatment, on airway and lung tissue mechanical responses, inflammation, extracellular matrix remodeling, and oxidative stress in guinea pigs with chronic allergic inflammation. Methods The guinea pigs were subjected to seven ovalbumin or saline inhalation exposures. Treatment with Y-27632 (1 mM) and dexamethasone (2 mg/kg) started at the fifth inhalation. Seventy-two hours after the seventh inhalation, the pulmonary mechanics were evaluated and exhaled nitric oxide (ENO) levels were determined. The lungs were removed and histological analysis was performed using morphometry. Results The treatment of guinea pigs with the Rho-kinase inhibitor and dexamethasone (ORC group) decreased ENO, the maximal mechanical responses after antigen challenge, inflammation, extracellular matrix remodeling and oxidative stress in the lungs. This therapeutic strategy reduced the levels of collagen and IFN-γ in the airway walls, as well as IL-2, IFN-γ, 8-iso-PGF2α and NF-κB in the distal parenchyma, when compared to isolated treatment with corticosteroid or Rho-kinase inhibitor (P < 0.05) and reduced the number of TIMP-1-positive cells and eosinophils in the alveolar septa compared to corticosteroid-treated animals (P < 0.05). The combined treatment with the Rho-kinase inhibitor and the corticosteroid provided maximal control over the remodeling response and inflammation in the airways and parenchyma. Conclusions Rho-kinase inhibition, alone or in combination with corticosteroids, can be considered a future pharmacological tool for the control of asthma.
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Affiliation(s)
| | - Renato Fraga Righetti
- Department of Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.
| | - Samantha Souza Possa
- Department of Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.
| | - Beatriz Saraiva Romanholo
- Department of Medicine, Laboratory of Experimental Therapeutics, LIM-20, School of Medicine, University of São Paulo, São Paulo, Brazil. .,University City of São Paulo (UNICID), São Paulo, Brazil. .,Institute of Medical Assistance to the State Public Servant of São Paulo (IAMSPE), São Paulo, Brazil.
| | | | | | - Débora Gonçalves Xisto
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Mariana Alves Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Carla Máximo Prado
- Department of Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.
| | - Edna Aparecida Leick
- Department of Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.
| | | | - Patrícia Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Evans RL, Changani KK, Hotee S, Pindoria K, Campbell S, Nials AT, Ford WR, Broadley KJ, Kidd EJ. Pulmonary edema measured by MRI correlates with late-phase response to allergen challenge. Exp Lung Res 2015; 41:189-98. [PMID: 25844692 DOI: 10.3109/01902148.2014.985407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
PURPOSE Asthma is associated with reversible airway obstruction, leucocyte infiltration, airways hyperresponsiveness (AHR), and airways remodeling. Fluid accumulation causes pulmonary edema contributing to airways obstruction. We examined the temporal relationship between the late asthmatic response (LAR) following allergen challenge of sensitized guinea-pigs and pulmonary edema measured by magnetic resonance imaging (MRI). MATERIALS AND METHODS Ovalbumin (OVA) sensitized guinea-pigs received either a single OVA inhalation (acute) or nine OVA inhalations at 48 h intervals (chronic). Airways obstruction was measured as specific airways conductance (sG(aw)) by whole body plethysmography. AHR to inhaled histamine and bronchoalveolar lavage for leucocyte counts were measured 24 h after a single or the final chronic ovalbumin challenges. MRI was performed at intervals after OVA challenge and high-intensity edemic signals were quantified. RESULTS Ovalbumin caused early bronchoconstriction, followed at 7 h by an LAR and at 24 h AHR and leucocyte influx. The bright-intensity MRI edema signal, peaking at 7 h, was significantly (P < .05) greater after chronic (9.0 ± 0.7 × 10(3) mm(3)) than acute OVA (7.6 ± 0.2 × 10(3) mm(3)). Dexamethasone treatment before acute OVA abolished the AHR and LAR and significantly reduced eosinophils and the bright-intensity MRI edema from 9.1 ± 1.0 to 6.4 ± 0.3 × 10(3) mm(3). CONCLUSION We show a temporal relationship between edema and the LAR and their parallel reduction, along with eosinophils and AHR, by dexamethasone. This suggests a close causative association between pulmonary edema and impaired airways function.
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Affiliation(s)
- Rhys L Evans
- 1Division of Pharmacology, Cardiff School of Pharmacy & Pharmaceutical Science, Cardiff University, Cardiff, United Kingdom
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Righetti RF, Pigati PADS, Possa SS, Habrum FC, Xisto DG, Antunes MA, Leick EA, Prado CM, Martins MDA, Rocco PRM, Tibério IDFLC. Effects of Rho-kinase inhibition in lung tissue with chronic inflammation. Respir Physiol Neurobiol 2013; 192:134-46. [PMID: 24373838 DOI: 10.1016/j.resp.2013.12.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 12/17/2013] [Accepted: 12/18/2013] [Indexed: 12/30/2022]
Abstract
We evaluated whether Rho-kinase inhibition (Y-27632) modulated distal lung responsiveness, inflammation, extracellular matrix remodeling and oxidative stress activation in guinea pigs (GPs) with chronic allergic inflammation. GPs were submitted to inhalation of ovalbumin (OVA-2×/week/4 weeks). From the 5th inhalation on, the Rho-kinase inhibitor group animals were submitted to Y-27632 inhalation 10min before each inhalation of OVA. Seventy-two hours after the seventh inhalation, the oscillatory mechanics of the distal lung strips were assessed under the baseline condition and after the ovalbumin challenge. Subsequently, the lung slices were submitted to morphometry. Rho-kinase inhibition in the ovalbumin-exposed animals attenuated distal lung elastance and resistance, eosinophils, IL-2, IL-4, IL-5, IL-13, TIMP-1, MMP-9, TGF-β, IFN-γ, NF-κB and iNOS-positive cells and the volume fraction of 8-iso-PGF2α, elastic, collagen and actin in alveolar walls compared with the OVA group (P<0.05). Rho-kinase inhibition contributed to the control of distal lung responsiveness, eosinophilic and Th1/Th2 responses and extracellular matrix remodeling in an animal model of chronic allergic inflammation.
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Affiliation(s)
- Renato Fraga Righetti
- Department of Medicine, School of Medicine, University of São Paulo, 01246-903 São Paulo, Brazil.
| | | | - Samantha Souza Possa
- Department of Medicine, School of Medicine, University of São Paulo, 01246-903 São Paulo, Brazil.
| | - Fábio Cetinic Habrum
- Department of Medicine, School of Medicine, University of São Paulo, 01246-903 São Paulo, Brazil.
| | - Débora Gonçalves Xisto
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil.
| | - Mariana Alves Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil.
| | - Edna Aparecida Leick
- Department of Medicine, School of Medicine, University of São Paulo, 01246-903 São Paulo, Brazil.
| | - Carla Máximo Prado
- Department of Biological Science, Universidade Federal de São Paulo, 09972-270 Diadema, São Paulo, Brazil.
| | - Mílton de Arruda Martins
- Department of Medicine, School of Medicine, University of São Paulo, 01246-903 São Paulo, Brazil.
| | - Patrícia Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Ilha do Fundão, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil.
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Kim SJ, Shin JH, Kim SC, Park CK, Kim SW. Preventive effects of oral tolerance on allergic inflammation and airway remodeling in a murine model. Am J Rhinol Allergy 2013; 27:e11-6. [PMID: 23406589 DOI: 10.2500/ajra.2013.27.3853] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Oral tolerance (OT) is considered as a preventive and therapeutic strategy for treating asthma and allergic rhinitis (AR). We investigated the preventive effects of OT on allergic inflammation and remodeling in the upper and lower airways in a mouse model of allergy. METHODS BALB/c mice were divided into four groups: control, allergy, low-dose OT, and high-dose OT. To induce OT, mice were fed ovalbumin (OVA) before sensitization with OVA/Al(OH)(3) at a dose of 1 mg for 6 days in low-dose OT group and a single dose of 25 mg in high-dose OT group. After sensitization followed by OVA challenge, nasal symptoms, interleukin (IL)-13, interferon (IFN)-gamma, IL-10, and transforming growth factor (TGF) beta-1 levels in nasal lavage (NAL) and bronchoalveolar lavage (BAL) fluids were measured, and OVA-specific IgE, IgG1, and IgG2a levels were measured in the serum. The airway hyperresponsiveness (AHR) was measured by enhanced pause. The goblet cell hyperplasia and the thickness of lamina propria were observed in the upper and lower airways. RESULTS In the allergy group, the allergic behavior scores, AHR, and OVA-specific IgE, IgG1, and IgG2a levels; inflammatory cells; IFN-gamma levels; and IL-13 levels in NAL/BAL fluids were elevated compared with the control group, low-dose OT group, and high-dose OT group. The allergy group had higher levels of IL-10 and TGF-beta-1 in BAL fluids when compared with the other groups. The goblet cell hyperplasia and the thickness of the lamina propria were attenuated in both OT groups compared with the allergy group. CONCLUSION OT may effectively prevent AHR, allergic inflammation, and airway remodeling in the upper and lower airways.
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Affiliation(s)
- Seung Joon Kim
- Department of Internal Medicine, The Catholic University of Korea, College of Medicine, Seoul, Korea
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Ameli F, Brocchetti F, Tosca MA, Signori A, Ciprandi G. Adenoidal hypertrophy and allergic rhinitis: is there an inverse relationship? Am J Rhinol Allergy 2013; 27:e5-10. [PMID: 23406587 DOI: 10.2500/ajra.2013.27.3854] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Nasal obstruction is a very common symptom in children. The main causes are allergic rhinitis (AR) and adenoidal hypertrophy (AH); the possible correlation between AR and AH has been investigated by few studies, mainly conducted using radiographic craniometry. This study aimed at investigating this topic by nasal endoscopy. METHODS There were 205 children (134 boys; mean age, 6.7 years age range, 4-12 years) studied. Clinical visit, nasal endoscopy, and skin-prick test were performed in all patients. Anterior nasal obstruction was graded using the Friedmann's classification. Adenoid size was graded using the Parikh's classification. Perception of symptoms by children was also assessed using the visual analog scale. RESULTS Ninety-two children (44.9%) had complete nasal obstruction and 28 children (13.7%) had choanae invasion. There was a negative significant correlation (r = -0.41; p < 0.001) between nose obstruction severity and volume of adenoids. Decreased probability of greater adenoid volume was associated with increased severity of nose obstruction (odds ratio [OR] = 0.13) and in patients with allergy compared with nonallergic patients (OR = 0.31). CONCLUSION This real-life study shows that large adenoids may be associated with absence of allergy, whereas large turbinates may be associated with small adenoids.
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Affiliation(s)
- Franco Ameli
- Ear, Nose, and Throat Unit, Villa Montallegro Private Clinic, Genoa, Italy
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Possa SS, Leick EA, Prado CM, Martins MA, Tibério IFLC. Eosinophilic inflammation in allergic asthma. Front Pharmacol 2013; 4:46. [PMID: 23616768 PMCID: PMC3627984 DOI: 10.3389/fphar.2013.00046] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 03/28/2013] [Indexed: 01/21/2023] Open
Abstract
Eosinophils are circulating granulocytes involved in pathogenesis of asthma. A cascade of processes directed by Th2 cytokine producing T-cells influence the recruitment of eosinophils into the lungs. Furthermore, multiple elements including interleukin (IL)-5, IL-13, chemoattractants such as eotaxin, Clara cells, and CC chemokine receptor (CCR)3 are already directly involved in recruiting eosinophils to the lung during allergic inflammation. Once recruited, eosinophils participate in the modulation of immune response, induction of airway hyperresponsiveness and remodeling, characteristic features of asthma. Various types of promising treatments for reducing asthmatic response are related to reduction in eosinophil counts both in human and experimental models of pulmonary allergic inflammation, showing that the recruitment of these cells really plays an important role in the pathophysiology of allergic diseases such asthma.
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Affiliation(s)
- Samantha S Possa
- Department of Medicine, School of Medicine, University of São Paulo São Paulo, Brazil
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Possa SS, Charafeddine HT, Righetti RF, da Silva PA, Almeida-Reis R, Saraiva-Romanholo BM, Perini A, Prado CM, Leick-Maldonado EA, Martins MA, Tibério IDFLC. Rho-kinase inhibition attenuates airway responsiveness, inflammation, matrix remodeling, and oxidative stress activation induced by chronic inflammation. Am J Physiol Lung Cell Mol Physiol 2012; 303:L939-52. [PMID: 23002076 DOI: 10.1152/ajplung.00034.2012] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Several studies have demonstrated the importance of Rho-kinase in the modulation of smooth muscle contraction, airway hyperresponsiveness, and inflammation. However, the effects of repeated treatment with a specific inhibitor of this pathway have not been previously investigated. We evaluated the effects of repeated treatment with Y-27632, a highly selective Rho-kinase inhibitor, on airway hyperresponsiveness, oxidative stress activation, extracellular matrix remodeling, eosinophilic inflammation, and cytokine expression in an animal model of chronic airway inflammation. Guinea pigs were subjected to seven ovalbumin or saline exposures. The treatment with Y-27632 (1 mM) started at the fifth inhalation. Seventy-two hours after the seventh inhalation, the animals' pulmonary mechanics were evaluated, and exhaled nitric oxide (E(NO)) was collected. The lungs were removed, and histological analysis was performed using morphometry. Treatment with Y-27632 in sensitized animals reduced E(NO) concentrations, maximal responses of resistance, elastance of the respiratory system, eosinophil counts, collagen and elastic fiber contents, the numbers of cells positive for IL-2, IL-4, IL-5, IL-13, inducible nitric oxide synthase, matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, transforming growth factor-β, NF-κB, IFN-γ, and 8-iso-prostaglandin F2α contents compared with the untreated group (P < 0.05). We observed positive correlations among the functional responses and inflammation, remodeling, and oxidative stress pathway activation markers evaluated. In conclusion, Rho-kinase pathway activation contributes to the potentiation of the hyperresponsiveness, inflammation, the extracellular matrix remodeling process, and oxidative stress activation. These results suggest that Rho-kinase inhibitors represent potential pharmacological tools for the control of asthma.
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Affiliation(s)
- Samantha Souza Possa
- Department of Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil
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Current world literature. Curr Opin Allergy Clin Immunol 2010; 10:87-92. [PMID: 20026987 DOI: 10.1097/aci.0b013e3283355458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Starling CM, Prado CM, Leick-Maldonado EA, Lanças T, Reis FG, Aristóteles LRCBR, Dolhnikoff M, Martins MA, Tibério IFLC. Inducible nitric oxide synthase inhibition attenuates lung tissue responsiveness and remodeling in a model of chronic pulmonary inflammation in guinea pigs. Respir Physiol Neurobiol 2008; 165:185-94. [PMID: 19118648 DOI: 10.1016/j.resp.2008.11.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 11/24/2008] [Accepted: 11/25/2008] [Indexed: 12/18/2022]
Abstract
We evaluated the influence of iNOS-derived NO on the mechanics, inflammatory, and remodeling process in peripheral lung parenchyma of guinea pigs with chronic pulmonary allergic inflammation. Animals treated or not with 1400 W were submitted to seven exposures of ovalbumin in increasing doses. Seventy-two hours after the 7th inhalation, lung strips were suspended in a Krebs organ bath, and tissue resistance and elastance measured at baseline and after ovalbumin challenge. The strips were submitted to histopathological measurements. The ovalbumin-exposed animals showed increased maximal responses of resistance and elastance (p<0.05), eosinophils counting (p<0.001), iNOS-positive cells (p<0.001), collagen and elastic fiber deposition (p<0.05), actin density (p<0.05) and 8-iso-PGF2alpha expression (p<0.001) in alveolar septa compared to saline-exposed ones. Ovalbumin-exposed animals treated with 1400 W had a significant reduction in lung functional and histopathological findings (p<0.05). We showed that iNOS-specific inhibition attenuates lung parenchyma constriction, inflammation, and remodeling, suggesting NO-participation in the modulation of the oxidative stress pathway.
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Affiliation(s)
- Claudia M Starling
- Department of Medicine, School of Medicine, University of São Paulo, Av. Dr. Arnaldo, 455, Sala 1216, 01246-903 São Paulo, SP, Brazil
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