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Mamessier E, Botturi K, Vervloet D, Magnan A. [T regulatory lymphocytes, atopy and asthma: a new concept in three dimensions]. Rev Mal Respir 2006; 22:305-11. [PMID: 16092167 DOI: 10.1016/s0761-8425(05)85482-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Allergic inflammation is considered to be the result of a pattern of Th2 lymphocyte activation. However this inflammation, relevant for atopy and infiltration of affected tissues by eosinophils, is insufficient by itself to explain the clinical features of asthma. Several studies have demonstrated that Th2 type inflammation was also associated in asthma with a Th1 response, with production of gamma interferon. It has recently been shown that the regulatory T lymphocytes (Treg) which produce IL-10 and/or TGF-beta and induce tolerance are defective in allergic patients. In addition, these lymphocytes increase during specific immunotherapy. Their decrease could explain the Th2 activation found in atopic patients. PERSPECTIVE We review the potential importance of Treg cells in atopy and also asthma, and propose a concept whereby the allergic inflammatory response would not be due to a Th1/Th2 imbalance, but rather to a Treg deficiency progressively rising from normal to atopic, from atopy to asthma and from asthma to acute exacerbations. CONCLUSION Three dimensions of inflammation need therefore to be taken into account: Th1, Th2 and Treg.
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Affiliation(s)
- E Mamessier
- PRES EA 3287, Groupe de Recherche Clinique, Pathologie respiratoire liée a l'environnement, Université de la Méditerranée, Service de Pneumo-Allergologie, Hôpital Sainte-Marguerite, Marseille, France
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Choi IS, Lin XH, Koh YA, Koh YI, Lee HC. Strain-dependent suppressive effects of BCG vaccination on asthmatic reactions in BALB/c mice. Ann Allergy Asthma Immunol 2006; 95:571-8. [PMID: 16400898 DOI: 10.1016/s1081-1206(10)61021-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND The choice of BCG vaccine strain may play an important role in vaccination efficiency. OBJECTIVE To investigate whether the suppressive effects of BCG on asthma depend on the strain of BCG. METHODS Female BALB/c mice were injected intraperitoneally with 1 of 4 different strains of BCG (1 X 10(6) CFU): Pasteur F1173P2, Tokyo 172, Tice, and Connaught. Seven days later, the animals were sensitized by 2 injections of ovalbumin (20 microg) at 2-week intervals before being provoked with 1% ovalbumin aerosols on 3 successive days. Thereafter, the mice underwent a methacholine bronchial challenge and were killed to quantify the inflammatory cells and cytokines in bronchoalveolar lavage fluid and the supernatant of cultured splenocytes. RESULTS The eosinophil proportion in the bronchoalveolar lavage fluid was significantly lower and the concentration of interferon-gamma and the interferon-gamma-interleukin 5 (IL-5) ratio in the supernatant of cultured splenocytes were significantly higher in each of the BCG-treated groups (n=10 per group) than in the asthma control group (n=15). However, the methacholine sensitivity (P < .05) and IL-5 concentration (P < .01) in the supernatant of cultured splenocytes were significantly lower only in the group treated with the Tokyo strain of BCG. There was a significant positive correlation between IL-5 and IL-10 concentrations (r = 0.79; P < .001). CONCLUSIONS The 4 strains of BCG suppressed asthma to different degrees, but all strains induced a shift in the T(H)1/T(H)2 balance toward T(H)1 without increasing IL-10-related regulatory T-cell activity.
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Affiliation(s)
- Inseon S Choi
- Department of Allergy, Chonnam National University Medical School, Gwangju, Republic of Korea.
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Koscher V, Milhe F, El Biaze M, Vervloet D, Magnan A. Variation of T-cell activation in allergic subjects during natural pollen exposure. Allergy 2006; 61:35-42. [PMID: 16364154 DOI: 10.1111/j.1398-9995.2005.00922.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Allergic inflammation is characterized by a Th2 activation. However, little is known about dynamics of T-cell cytokine production during natural allergen exposure. The aim of this study was to assess the Th1/Th2 balance in cypress allergic patients compared with controls, and variations of this balance over the pollen season. METHODS Twenty cypress allergic patients and 10 controls were studied, distributed during two consecutive pollen seasons. Cytokine production was assessed by flow cytometry and ELISA. The variation of cytokine production during the pollen season was analyzed among patients in four occasions, and the preseason values were compared with controls. IL-13 and IFN-gamma-containing T cells were assessed among whole blood cells and PBMC. In addition the effect of specific stimulation by Juniperus ashei pollen extract was studied. RESULTS Compared with controls, IL-13-producing T cells were increased in allergics in any case. By contrast, compared with controls, allergic IFN-gamma-producing T cells were decreased in whole blood, but not in PBMC, and were increased after specific stimulation. During the season, an increase in IFN-gamma- and a decrease in IL-13-producing T cells occurred in patients, whatever the culture conditions. CONCLUSION These results show that the allergic T-cell activation is not limited to a Th2 profile: allergen-stimulated T cells are able to produce IFN-gamma at baseline, and the Th1/Th2 ratio increases during the pollen season.
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Affiliation(s)
- V Koscher
- Faculté de Médecine de Marseille, Université de la Méditerranée, Assistance Publique Hôpitaux de Marseille, Service de Pneumo-Allergologie, INSERM, Marseilles, France
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Barrios CS, Johnson BD, D Henderson J, Fink JN, Kelly KJ, Kurup VP. The costimulatory molecules CD80, CD86 and OX40L are up-regulated in Aspergillus fumigatus sensitized mice. Clin Exp Immunol 2005; 142:242-50. [PMID: 16232210 PMCID: PMC1809515 DOI: 10.1111/j.1365-2249.2005.02905.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aspergillus fumigatus (Af) is a fungus associated with allergic bronchopulmonary aspergillosis (ABPA) and other allergic diseases. Immune responses in these diseases are due to T and B cell responses. T cell activation requires both Af-specific engagement of the T-cell-receptor as well as interaction of antigen independent costimulatory molecules including CD28-CD80/CD86 and OX40-OX40L interactions. Since these molecules and their interactions have been suggested to have a potential involvement in the pathogenesis of ABPA, we have investigated their role in a model of experimental allergic aspergillosis. BALB/c mice were primed and sensitized with Af allergens, with or without exogenous IL-4. Results showed up-regulation of both CD86 and CD80 molecules on lung B cells from Af-sensitized mice (79% CD86+ and 24% CD80+) and Af/rIL-4-treated mice (90% CD86+ and 24% CD80+) compared to normal controls (36% and 17%, respectively). Lung macrophages in Af-sensitized mice treated or not with IL-4 showed enhanced expression of these molecules. OX40L expression was also up-regulated on lung B cells and macrophages from both Af-sensitized and Af/rIL-4 exposed mice as compared to normal controls. All Af-sensitized animals showed peripheral blood eosinophilia, enhanced total serum IgE and allergen-specific IgG1 antibodies and characteristic lung inflammation. The up-regulation of CD80, CD86 and OX40L molecules on lung B cells and macrophages from Af-allergen exposed mice suggests a major role for these molecules in the amplification and persistence of immunological and inflammatory responses in ABPA.
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Affiliation(s)
- C S Barrios
- Allergy-Immunology Division, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, 53295, USA
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de Diego-Damia A, Martínez-Moragón E. Impacto científico del Año Asma 2003: análisis de las publicaciones en Archivos de Bronconeumología. Arch Bronconeumol 2005. [DOI: 10.1016/s0300-2896(05)70723-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Awareness of the key role of the intestinal microflora in the generation of the immunophysiological regulation and in the defence against pathogenic agents has attracted our interest in ways of manipulating the microbiota to improve health. Dietary modulation of the intestinal microflora is today one of the main topics of interest in the nutritional sciences. Performing this modulation in the neonatal or early infancy period, when immunological programming takes place, is a relatively new concept. Fructo-oligosaccharides (FOS) and galacto-oligosaccharides (GOS) are prebiotics whose bifidogenic activity has been proven in adults. However, only recently have they been combined in infant formulas to reproduce the prebiotic effect of human milk oligosaccharides. In two consecutive trials, it has been demonstrated that supplementation of infant formulas with a mixture of GOS and FOS modified the fecal flora of term and preterm infants, stimulating the growth of Bifidobacteria. In the trial with term infants, the bifidogenic effect of the prebiotic mixture was dose dependent and there was also a significant increase in the number of Lactobacilli in the supplemented group. These findings offer a promising horizon for the early prevention of allergy and infections in infants.
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Affiliation(s)
- Guido E Moro
- Centre of Infant Nutrition for the Prevention of Adult Diseases, Macedonio Melloni Maternity Hospital, Postgraduate School of Paediatrics, University of Milan, Milan, Italy.
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Trautmann A, Kruger K, Akdis M, Muller-Wening D, Akkaya A, Brocker EB, Blaser K, Akdis CA. Apoptosis and loss of adhesion of bronchial epithelial cells in asthma. Int Arch Allergy Immunol 2005; 138:142-50. [PMID: 16179825 DOI: 10.1159/000088436] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2004] [Accepted: 04/07/2005] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Asthma is an inflammatory airway disease associated with infiltration of T cells and eosinophils, increased levels of pro-inflammatory cytokines, and shedding of bronchial epithelial cells (EC). We have recently shown that T cells and eosinophils cooperate in inducing bronchial EC apoptosis in asthma through secretion of IFN-gamma and TNF-alpha. Since EC shedding is a histologic hallmark of asthma, the intercellular junction of EC may be a target of pro-inflammatory cytokines. METHODS Bronchial EC, cultured and exposed to IFN-gamma and TNF-alpha, were studied for the expression of adhesion molecules and apoptosis. In addition, the epithelial layer of bronchial biopsies from asthma patients was evaluated for apoptosis, shedding, and expression of adhesion molecules. RESULTS We demonstrate that the induction of EC apoptosis is accompanied by loss of E-cadherin. In situ examination of E-cadherin in asthma revealed a reduction in its expression on EC membranes. In contrast, the in vitro and in vivo expression of beta1-integrins and intercellular adhesion molecule-1 (ICAM-1) increased on EC during asthmatic airway inflammation. CONCLUSIONS Loss of cadherin-mediated intercellular adhesion and apoptosis could account for fragility and shedding of EC in asthma, especially since this occurs between columnar and basal EC.
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Affiliation(s)
- Axel Trautmann
- Swiss Institute of Allergy and Asthma Research (SIAF), Davos, Switzerland.
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Abstract
Allergic asthma is characterized by airway hyper-responsiveness and chronic mucosal inflammation mediated by CD4(+) Th2 lymphocytes. Regulatory CD4(+)CD25(+) T cells are important components of the homeostasis of the immune system, as impaired CD4(+)CD25(+) T cell activity can cause autoimmune diseases and allergy. The mechanism of suppression by CD4(+)CD25(+) T cells remains controversial; different in vivo and in vitro studies raise possible roles for the immunosuppressive cytokines interleukin-10 and transforming growth factor-beta, forkhead transcription factor Foxp3, glucocorticoid-induced tumor necrosis factor receptor, cytotoxic lymphocyte associated antigen-4, 4-1BB costimulator receptor, a CD4-related molecule LAG-3, and neuropilin-1. Current data suggest that Th2 responses to allergens are normally suppressed by CD4(+)CD25(+) T cells. Suppression by CD4(+)CD25(+) T cells is decreased in allergic individuals. Furthermore, CD4(+)CD25(+) T cells play a key role in regulating airway eosinophilic inflammation. The immunomodulatory properties of CD4(+)CD25(+) T cells do extend to Th2 responses, most notably by limiting the development of a proinflammatory CD4(+) Th2 phenotype characterized by reduced cytokine production. An understanding of the roles of CD4(+)CD25(+) T cells in vivo could provide better insight into the design of novel approaches to modulate the chronic airway inflammatory reaction evident in bronchial asthma.
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Affiliation(s)
- H-Z Shi
- Department of Respiratory Medicine, First Affiliated Hospital, Guangxi Medical University, Guangxi, China
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Abstract
CLCA proteins were discovered in bovine trachea and named for a calcium-dependent chloride conductance found in trachea and in other secretory epithelial tissues. At least four closely located gene loci in the mouse and the human code for independent isoforms of CLCA proteins. Full-length CLCA proteins have an unprocessed mass ratio of approximately 100 kDa. Three of the four human loci code for the synthesis of membrane-associated proteins. CLCA proteins affect chloride conductance, epithelial secretion, cell-cell adhesion, apoptosis, cell cycle control, mucus production in asthma, and blood pressure. There is a structural and probable functional divergence between CLCA isoforms containing or not containing beta4-integrin binding domains. Cell cycle control and tumor metastasis are affected by isoforms with the binding domains. These isoforms are expressed prominently in smooth muscle, in some endothelial cells, in the central nervous system, and also in secretory epithelial cells. The isoform with disrupted beta4-integrin binding (hCLCA1, pCLCA1, mCLCA3) alters epithelial mucus secretion and ion transport processes. It is preferentially expressed in secretory epithelial tissues including trachea and small intestine. Chloride conductance is affected by the expression of several CLCA proteins. However, the dependence of the resulting electrical signature on the expression system rather than the CLCA protein suggests that these proteins are not independent Ca2+-dependent chloride channels, but may contribute to the activity of chloride channels formed by, or in conjunction with, other proteins.
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Affiliation(s)
- Matthew E Loewen
- Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada
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Weidinger S, Klopp N, Wagenpfeil S, Rümmler L, Schedel M, Kabesch M, Schäfer T, Darsow U, Jakob T, Behrendt H, Wichmann HE, Ring J, Illig T. Association of a STAT 6 haplotype with elevated serum IgE levels in a population based cohort of white adults. J Med Genet 2005; 41:658-63. [PMID: 15342695 PMCID: PMC1735893 DOI: 10.1136/jmg.2004.020263] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Several studies have shown linkage of chromosome 12q 13-24 with atopy related phenotypes. Among candidate genes in this region is STAT6 (signal transducer and activator of transcription), which is essential for Th2 cell differentiation, recruitment, and effector function. METHODS We evaluated six polymorphisms of STAT6 for evidence of associations with serum IgE levels and atopic diseases in a population based cross sectional cohort of 1407 German adults. Genotyping was performed using the matrix assisted laser desorption ionisation-time of flight mass spectrometry method. Haplotypes were estimated using the SAS/Genetics module, and population-derived IgE percentiles (50% IgE>53 kU/l, 66% IgE>99 kU/l and 90% IgE>307 kU/l) were modelled as outcome variables in haplotype trend regression analysis. RESULTS All polymorphisms were genotyped successfully. Haplotype reconstruction revealed 8/64 possible haplotypes, reaching estimated frequencies of 1% or more. One polymorphism in intron 2 (rs324011) showed a significant association with total serum IgE (p = 0.015). A STAT6 risk haplotype for elevated IgE showing odds ratios of 1.7 (p = 0.015) for IgE cut-off 100 kU/l, and 1.54 (p = 0.032), 1.6 (p = 0.025), and 2.54 (p = 0.007) for IgE percentiles 50%, 66%, and 90%, respectively was detected. The increased risk of this haplotype was confirmed by linear haplotype trend regression on log transformed IgE values (p = 0.007). Analysis further revealed a risk haplotype for specific sensitisation and a risk haplotype for asthma. CONCLUSION The data indicate that genetic variants within STAT6 contribute significantly to IgE regulation and manifestation of atopic diseases.
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Affiliation(s)
- S Weidinger
- Department of Dermatology and Allergy, Technical University Munich, Biedersteiner St. 29, 80802 Munich, Germany.
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Wang X, Zhao H, Andersson R. Proteomics and leukocytes: an approach to understanding potential molecular mechanisms of inflammatory responses. J Proteome Res 2005; 3:921-9. [PMID: 15473680 DOI: 10.1021/pr0499601] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Leukocytes play an important role in the progression of disease and leukocyte-derived proteins are associated with the pathogenesis of the disease. Leukocyte activation causes production of inflammatory mediators, over-expression of cell surface adhesion molecules, and an increase in migration and infiltration, phagocytosis, and degranulation, as well as receptor phosphorylation and signal transduction. An increasing number of studies on the application of leukocyte proteomics have appeared in mapping protein profiles of inflammatory cells, contributing to the understanding of potential mechanisms involved in leukocyte function. Together with improvements in proteomic technology in leukocyte research, leukocyte proteomic analysis becomes more simple, rapid, flexible, sensitive, and specific. This enables proteomic investigation of activated or non-activated leukocytes to be highly focused on defined suborgans or specific signaling pathways. Research in leukocyte proteomics is progressing from fingerprinting to functioning, human cell lines to primary leukocytes, non-activated cells to inflammatory mediator-stimulated cells, in vitro culture to in vivo challenge, and animal models to human disease. A number of newly identified proteins from leukocyte proteomics may offer new mechanism-orientated targets for drug discovery and development.
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Affiliation(s)
- Xiangdong Wang
- College of Medicine, Zhe-Jiang University, Hang-Zhou, Peoples Republic of China.
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Bousquet J, Warner JO. Allergy and Pediatric Allergy and Immunology are the official organs of the European Academy of Allergology and Clinical Immunology. Allergy 2004; 59:1333-8. [PMID: 15507103 DOI: 10.1111/j.1398-9995.2004.00766.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Warner JO, Bousquet J. Allergy and Pediatric Allergy and Immunology are the official organs of the European Academy of Allergology and Clinical Immunology. Pediatr Allergy Immunol 2004; 15:479-84. [PMID: 15610359 DOI: 10.1111/j.1399-3038.2004.00235.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gardner LM, Spyroglou L, O'Hehir RE, Rolland JM. Increased allergen concentration enhances IFN-gamma production by allergic donor T cells expressing a peripheral tissue trafficking phenotype. Allergy 2004; 59:1308-17. [PMID: 15507100 DOI: 10.1111/j.1398-9995.2004.00584.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Clinically effective allergen-specific immunotherapy correlates with decreased circulating allergen-specific IL-4+ T cells but increased IFN-gamma+ cells at sites of allergen challenge. Whether immunotherapy promotes trafficking of IFN-gamma+ T cells to peripheral tissues is unknown. As aeroallergen is administered at higher concentrations during immunotherapy than those encountered naturally, the effect of allergen concentration on adhesion molecule (CD62L and CD49d) and chemokine receptor (CCR3 and CCR5) expression by peripheral-blood T cells was analysed in parallel with cytokine production. METHODS House dust mite-allergic donor peripheral blood mononuclear cells were cultured for 14 days with different allergen concentrations. Cytokine profiles of were analysed by flow cytometry. RESULTS Cultures stimulated with 100 microg/ml house dust mite extract compared with 1 microg/ml had increased proportions and numbers of CD62Llo, CD49dhi or CCR5+ T cells expressing IFN-gamma. CCR3-positive CD4+ and CD8+ T cell numbers were very low and did not differ between cultures. In contrast the proportions of 'peripheral tissue trafficking' CD4+ T cells expressing IL-4 were decreased in cultures stimulated with high in comparison with low allergen concentration. CONCLUSION These results indicate the importance of achieving high allergen doses during immunotherapy to promote IFN-gamma production and expression of a 'peripheral tissue trafficking' phenotype by allergen-specific CD4+ and CD8+ T cells. The net change in cytokine milieu at sites of allergen encounter would then down-regulate clinical manifestations of allergic disease.
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Affiliation(s)
- L M Gardner
- Department of Pathology and Immunology, Monash University, Melbourne, Victoria, Australia
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Abstract
Activation-induced cell death, anergy and/or immune response modulation by T-regulatory cells (T(Reg)) are essential mechanisms of peripheral T-cell tolerance. There is growing evidence that anergy, tolerance and active suppression are not entirely distinct, but rather, represent linked mechanisms possibly involving the same cells and multiple suppressor mechanisms. Skewing of allergen-specific effector T cells to T(Reg) cells appears as a crucial event in the control of healthy immune response to allergens and successful allergen-specific immunotherapy. The T(Reg) cell response is characterized by abolished allergen-induced specific T-cell proliferation and suppressed T helper 1 (Th1)- and Th2-type cytokine secretion. In addition, mediators of allergic inflammation that trigger cAMP-associated G-protein coupled receptors, such as histamine receptor 2 may contribute to peripheral tolerance mechanisms. The increased levels of interleukin-10 (IL-10) and transforming growth factor-beta (TGF-beta) that are produced by T(Reg) cells potently suppress immunoglobulin E (IgE) production, while simultaneously increasing production of noninflammatory isotypes IgG4 and IgA, respectively. In addition, T(Reg) cells directly or indirectly suppress effector cells of allergic inflammation such as mast cells, basophils and eosinophils. In conclusion, peripheral tolerance to allergens is controlled by multiple active suppression mechanisms. It is associated with regulation of antibody isotypes and effector cells to the direction of a healthy immune response and opens a window for novel therapies of allergic diseases.
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Affiliation(s)
- C A Akdis
- Swiss Institute of Allergy and Asthma Research, Davos, Switzerland
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Affiliation(s)
- Richard J Ulevitch
- Department of Immunology, The Scripps Research Institute, La Jolla, California 92037, USA.
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67
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Current World Literature. Curr Opin Allergy Clin Immunol 2004. [DOI: 10.1097/01.all.0000136752.28324.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pham Thi TN, Le Bourgeois M, Scheinmann P, de Blic J. Airway inflammation and asthma treatment modalities. Pediatr Pulmonol Suppl 2004; 26:229-33. [PMID: 15029659 DOI: 10.1002/ppul.70114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thuong Nhân Pham Thi
- Pediatric Allergology and Pneumology Dpt, Necker Enfants Malades Hospital, 149 rue de Sèvres, 75743 Paris, France
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Bousquet J, Jacot W, Yssel H, Vignola AM, Humbert M. Epigenetic inheritance of fetal genes in allergic asthma. Allergy 2004; 59:138-47. [PMID: 14763925 DOI: 10.1046/j.1398-9995.2003.00359.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Asthma has been associated with an exaggerated T-helper type 2 (Th2) over Th1 responses to allergic and nonallergic stimuli, which leads to chronic airway inflammation and airway remodeling. In the present article, we propose that many of the genes involved in IgE synthesis and airways (re)modeling in asthma are persistent or reminiscent fetal genes which may not be silenced during early infancy (or late pregnancy). Genes of the embryologic differentiation of ectodermic and endodermic tissues may explain some of the patterns of airway remodeling in asthma. In utero programming leads to gene expression, the persistence of which may be associated with epigenetic inheritance phenomena induced by nonspecific environmental factors. Clear delineation of these issues may yield new information on the mechanisms of asthma and new targets for therapeutic intervention and primary prevention.
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Affiliation(s)
- J Bousquet
- Department of Respiratory Diseases, University Hospital, Montpellier, France INSERM U454, Montpellier, France
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Rigoli L, Di Bella C, Procopio V, Barberio G, Barberi I, Caminiti L, La Grutta S, Briuglia S, Salpietro CD, Pajno GB. Molecular analysis of sequence variants in the Fcepsilon receptor I beta gene and IL-4 gene promoter in Italian atopic families. Allergy 2004; 59:213-8. [PMID: 14763936 DOI: 10.1046/j.1398-9995.2003.00385.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The genetic variants in the Fcepsilon receptor I beta gene (Glu237Gly) and the T allele of the (C590T) polymorphism of interleukin (IL)-4 gene promoter were reported to be associated with atopy. But the data of the studies in different populations are contrasting with one another. METHODS A group of 25 Italian nuclear families were studied. In each family at least two allergic subjects were present. The allergic children were 65 and the allergic relatives were 35. One hundred and three nonallergic unrelated controls included outpatiens with no history of atopy. The (C590T) promoter polymorphism of the IL-4 and the genetic variant Glu237Gly of Fcepsilon RI beta genes were analysed by the polymerase chain reaction-restriction fragment length polymorphism method. RESULTS A significant difference was observed in the genotype frequency at codon 237 of the Fcepsilon RI beta gene between allergic children and nonatopic control (P < 0.01) and in the allergic relatives (P < 0.001). In the children, the Glu237Gly polymorphism was also associated with elevated circulating levels of immunoglobulin E. The -590C/T allele of IL-4 promoter gene showed no association with atopy. CONCLUSIONS In our study, the Glu237Gly polymorphism of the Fcepsilon RI beta gene was associated with atopy. Our results have not pointed out an association between the (C590T) promoter polymorphism of the IL-4 gene and atopy. These data suggest the potential role of the Fc RI beta gene in the development of the allergy.
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Affiliation(s)
- L Rigoli
- Department of Pediatrics, University of Messina, School of Medicine, Italy
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