1
|
Zeidler C, Kupfer J, Dalgard FJ, Bewley A, Evers AWM, Gieler U, Lien L, Sampogna F, Tomas Aragones L, Vulink N, Finlay AY, Legat FJ, Titeca G, Jemec GB, Misery L, Szabó C, Grivcheva Panovska V, Spillekom van Koulil S, Balieva F, Szepietowski JC, Reich A, Ferreira BR, Lvov A, Romanov D, Marron SE, Gracia Cazaña T, Elyas A, Altunay IK, Thompson AR, van Beugen S, Ständer S, Schut C. Dermatological patients with itch report more stress, stigmatization experience, anxiety and depression compared to patients without itch: Results from a European multi-centre study. J Eur Acad Dermatol Venereol 2024. [PMID: 38468596 DOI: 10.1111/jdv.19913] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 01/23/2024] [Indexed: 03/13/2024]
Abstract
BACKGROUND Itch as the most common symptom in dermatology has been shown to be related to psychological factors such as stress, anxiety and depression. Moreover, associations were found between perceived stigmatization and itch. However, studies investigating the differences between patients with dermatoses with and without itch regarding perceived stress, stigmatization, anxiety and depression are missing. Therefore, one of the aims of the second study of the European Society for Dermatology and Psychiatry (ESDaP study II) was to investigate these relationships in a large cohort of patients with different itchy dermatoses. RESULTS 3399 patients with 14 different itchy dermatoses were recruited at 22 centres in 17 European countries. They filled in questionnaires to assess perceived stigmatization, stress, signs of clinically relevant anxiety or depression, itch-related quality of life, the overall health status, itch duration, frequency and intensity. The most significant association between the severity of itching and the perception of stress was observed among individuals with rosacea (correlation coefficient r = 0.314). Similarly, the strongest links between itch intensity and experiences of stigmatization, anxiety, and depression were found in patients with seborrheic dermatitis (correlation coefficients r = 0.317, r = 0.356, and r = 0.400, respectively). Utilizing a stepwise linear regression analysis, it was determined that within the entire patient cohort, 9.3% of the variation in itch intensity could be accounted for by factors including gender, levels of anxiety, depression, and perceived stigmatization. Females and individuals with elevated anxiety, depression, and perceived stigmatization scores reported more pronounced itch intensities compared to those with contrary attributes. CONCLUSION This study underscores the connection between experiencing itch and its intensity and the psychological strain it places on individuals. Consequently, psychological interventions should encompass both addressing the itch itself and the interconnected psychological factors. In specific cases, it becomes imperative for dermatologists to direct individuals towards suitable healthcare resources to undergo further psychological assessment.
Collapse
Affiliation(s)
- C Zeidler
- Department of Dermatology and Center for Chronic Pruritus, University Hospital Münster, Münster, Germany
| | - J Kupfer
- Institute of Medical Psychology, Justus-Liebig-University, Gießen, Germany
| | - F J Dalgard
- Division of Mental Health and Addiction, Vestfold Hospital Trust, Tønsberg, Norway
- Department of Dermatology and Venereology, Skåne University Hospital, Malmo, Sweden
| | - A Bewley
- Barts Health NHS Trust & Queen Mary University of London, London, UK
| | - A W M Evers
- Faculty of Social and Behavioural Sciences, Institute of Psychology, Unit Health, Medical and Neuropsychology, Leiden University, Leiden, The Netherlands
| | | | - L Lien
- Faculty of Social and Health Sciences, Inland Norway University of Applied Sciences, Elverum, Norway
- Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders, Innlandet Hospital Trust, Brumunddal, Norway
| | - F Sampogna
- Clinical Epidemiology Unit, IDI-IRCCS, Rome, Italy
| | - L Tomas Aragones
- Department of Psychology, University of Zaragoza, Zaragoza, Spain
- Aragon Psychodermatology Research Group Zaragoza, Zaragoza, Spain
| | - N Vulink
- Department of Psychiatry, Amsterdam UMC, Location Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - A Y Finlay
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - F J Legat
- Department of Dermatology, Medical University of Graz, Graz, Austria
| | - G Titeca
- Clinique Notre Dame de Grâce, Gosselies, Belgium
| | - G B Jemec
- Department of Dermatology, Zealand University Hospital, Roskilde, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - L Misery
- Department of Dermatology, University Hospital of Brest, Brest, France
| | - C Szabó
- Institute of Psychology, University of Szeged, Szeged, Hungary
| | - V Grivcheva Panovska
- School of Medicine, PHI University Clinic of Dermatology, University St Cyril and Methodius, Skopje, North Macedonia
| | - S Spillekom van Koulil
- Radboud Institute for Health Sciences, Department of Medical Psychology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - F Balieva
- Department of Dermatology, Stavanger University Hospital, Stavanger, Norway
- Faculty of Health Sciences, University of Stavanger, Stavanger, Norway
| | - J C Szepietowski
- Department of Dermatology, Venereology and Allergology, Wroclaw Medical University, Wroclaw, Poland
| | - A Reich
- Department of Dermatology, Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów, Poland
| | - B R Ferreira
- Centre for Philosophy of Science of the University of Lisbon, Lisbon, Portugal
- Department of Dermatology, Coimbra Hospital and University Centre, Portugal
- University of Brest, Lien, France
| | - A Lvov
- Central State Medical Academy of Department of Presidential Affairs, Moscow, Russia
- Medical Research and Educational Centre, Lomonosov Moscow State University, Moscow, Russia
| | - D Romanov
- Department of Psychiatry and Psychosomatics, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Department of Boundary Mental Conditions and Psychosomatic Disorders, Mental Health Research Centre, Moscow, Russia
- International Institute of Psychosomatic Health, Moscow, Russia
| | - S E Marron
- Aragon Psychodermatology Research Group Zaragoza, Zaragoza, Spain
- Department of Dermatology, University Hospital Miguel Servet, Zaragoza, Spain
| | - T Gracia Cazaña
- Department of Dermatology, University Hospital Miguel Servet, Zaragoza, Spain
| | - A Elyas
- Department of Dermatology, Skåne University Hospital, Malmö, Sweden
| | - I K Altunay
- Şişli Hamidiye Etfal Training and Research Hospital, Dermatology and Venereology Clinic, University of Health Sciences, Istanbul, Turkey
| | - A R Thompson
- South Wales Clinical Psychology Training Programme, Cardiff & Vale University Health Board & School of Psychology, Cardiff University, Cardiff, UK
| | - S van Beugen
- Faculty of Social and Behavioural Sciences, Institute of Psychology, Unit Health, Medical and Neuropsychology, Leiden University, Leiden, The Netherlands
| | - S Ständer
- Department of Dermatology and Center for Chronic Pruritus, University Hospital Münster, Münster, Germany
| | - C Schut
- Institute of Medical Psychology, Justus-Liebig-University, Gießen, Germany
| |
Collapse
|
2
|
Ferreira BR, Misery L. Chronic pruritus and alexithymia. J Eur Acad Dermatol Venereol 2024; 38:e39-e40. [PMID: 37561923 DOI: 10.1111/jdv.19410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023]
Affiliation(s)
- B R Ferreira
- LIEN, University of Brest, Brest, France
- Department of Dermatology, Centre Hospitalier de Mouscron, Hainaut, Belgium
- Centre for Philosophy of Science of the University of Lisbon, Lisbon, Portugal
| | - L Misery
- LIEN, University of Brest, Brest, France
- Department of Dermatology, Brest University Hospital, Brest, France
| |
Collapse
|
3
|
Powell J, Talenti A, Fisch A, Hemmink JD, Paxton E, Toye P, Santos I, Ferreira BR, Connelley TK, Morrison LJ, Prendergast JGD. Profiling the immune epigenome across global cattle breeds. Genome Biol 2023; 24:127. [PMID: 37218021 DOI: 10.1186/s13059-023-02964-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 05/08/2023] [Indexed: 05/24/2023] Open
Abstract
BACKGROUND Understanding the variation between well and poorly adapted cattle breeds to local environments and pathogens is essential for breeding cattle with improved climate and disease-resistant phenotypes. Although considerable progress has been made towards identifying genetic differences between breeds, variation at the epigenetic and chromatin levels remains poorly characterized. Here, we generate, sequence and analyse over 150 libraries at base-pair resolution to explore the dynamics of DNA methylation and chromatin accessibility of the bovine immune system across three distinct cattle lineages. RESULTS We find extensive epigenetic divergence between the taurine and indicine cattle breeds across immune cell types, which is linked to the levels of local DNA sequence divergence between the two cattle sub-species. The unique cell type profiles enable the deconvolution of complex cellular mixtures using digital cytometry approaches. Finally, we show distinct sub-categories of CpG islands based on their chromatin and methylation profiles that discriminate between classes of distal and gene proximal islands linked to discrete transcriptional states. CONCLUSIONS Our study provides a comprehensive resource of DNA methylation, chromatin accessibility and RNA expression profiles of three diverse cattle populations. The findings have important implications, from understanding how genetic editing across breeds, and consequently regulatory backgrounds, may have distinct impacts to designing effective cattle epigenome-wide association studies in non-European breeds.
Collapse
Affiliation(s)
- Jessica Powell
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK.
| | - Andrea Talenti
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK
| | - Andressa Fisch
- Ribeirão Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Johanneke D Hemmink
- Centre for Tropical Livestock Genetics and Health, Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK
- The International Livestock Research Institute, PO Box 30709, Nairobi, 00100, Kenya
| | - Edith Paxton
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK
| | - Philip Toye
- The International Livestock Research Institute, PO Box 30709, Nairobi, 00100, Kenya
- Centre for Tropical Livestock Genetics and Health, ILRI Kenya, PO Box 30709, Nairobi, 00100, Kenya
| | - Isabel Santos
- Ribeirão Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Beatriz R Ferreira
- Ribeirão Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Tim K Connelley
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK
- Centre for Tropical Livestock Genetics and Health, Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK
| | - Liam J Morrison
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK.
- Centre for Tropical Livestock Genetics and Health, Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK.
| | - James G D Prendergast
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK.
- Centre for Tropical Livestock Genetics and Health, Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, EH25 9RG, UK.
| |
Collapse
|
4
|
Talenti A, Powell J, Wragg D, Chepkwony M, Fisch A, Ferreira BR, Mercadante MEZ, Santos IM, Ezeasor CK, Obishakin ET, Muhanguzi D, Amanyire W, Silwamba I, Muma JB, Mainda G, Kelly RF, Toye P, Connelley T, Prendergast J. Optical mapping compendium of structural variants across global cattle breeds. Sci Data 2022; 9:618. [PMID: 36229544 PMCID: PMC9561109 DOI: 10.1038/s41597-022-01684-w] [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: 05/18/2022] [Accepted: 09/04/2022] [Indexed: 11/30/2022] Open
Abstract
Structural variants (SV) have been linked to important bovine disease phenotypes, but due to the difficulty of their accurate detection with standard sequencing approaches, their role in shaping important traits across cattle breeds is largely unexplored. Optical mapping is an alternative approach for mapping SVs that has been shown to have higher sensitivity than DNA sequencing approaches. The aim of this project was to use optical mapping to develop a high-quality database of structural variation across cattle breeds from different geographical regions, to enable further study of SVs in cattle. To do this we generated 100X Bionano optical mapping data for 18 cattle of nine different ancestries, three continents and both cattle sub-species. In total we identified 13,457 SVs, of which 1,200 putatively overlap coding regions. This resource provides a high-quality set of optical mapping-based SV calls that can be used across studies, from validating DNA sequencing-based SV calls to prioritising candidate functional variants in genetic association studies and expanding our understanding of the role of SVs in cattle evolution. Measurement(s) | Optical Mapping | Technology Type(s) | Optical Mapping | Factor Type(s) | Structural variants | Sample Characteristic - Organism | Bos taurus | Sample Characteristic - Location | United Kingdom • Kenya • Zambia • Uganda • Brazil • Nigeria |
Collapse
Affiliation(s)
- A Talenti
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom.
| | - J Powell
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom
| | - D Wragg
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom.,Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, UK
| | - M Chepkwony
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya.,Centre for Tropical Livestock Genetics and Health, ILRI Kenya, Nairobi, 30709-00100, Kenya
| | - A Fisch
- Ribeirão Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, SP, Brazil
| | - B R Ferreira
- Ribeirão Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, SP, Brazil
| | - M E Z Mercadante
- Institute of Animal Science, Agriculture Department of São Paulo Government, Sertãozinho, SP, 14.174-000, Brazil
| | - I M Santos
- Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - C K Ezeasor
- Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - E T Obishakin
- Biotechnology Division, National Veterinary Research Institute, Vom, Plateau State, Nigeria.,Biomedical Research Centre, Ghent University Global Campus, Songdo, Incheon, South Korea
| | - D Muhanguzi
- School of Biosecurity, Biotechnology and Laboratory Sciences (SBLS), College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P.O Box 7062, Kampala, Uganda
| | - W Amanyire
- School of Biosecurity, Biotechnology and Laboratory Sciences (SBLS), College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P.O Box 7062, Kampala, Uganda
| | - I Silwamba
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, P.O BOX 32379, Lusaka, Zambia.,Department of Laboratory and Diagnostics, Livestock Services Cooperative Society, P.O. BOX 32025, Lusaka, Zambia
| | - J B Muma
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, P.O BOX 32379, Lusaka, Zambia
| | - G Mainda
- Department of Veterinary Services, Ministry of Fisheries and Livestock, Central Veterinary Research Institute, P.O. Box 33980, Lusaka, Zambia
| | - R F Kelly
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom.,Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, UK
| | - P Toye
- The International Livestock Research Institute, PO Box 30709, Nairobi, Kenya
| | - T Connelley
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom. .,Centre for Tropical Livestock Genetics and Health, Easter Bush, Midlothian, EH25 9RG, UK.
| | - J Prendergast
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, United Kingdom. .,Centre for Tropical Livestock Genetics and Health, Easter Bush, Midlothian, EH25 9RG, UK.
| |
Collapse
|
5
|
Garcia GR, Chaves Ribeiro JM, Maruyama SR, Gardinassi LG, Nelson K, Ferreira BR, Andrade TG, de Miranda Santos IKF. A transcriptome and proteome of the tick Rhipicephalus microplus shaped by the genetic composition of its hosts and developmental stage. Sci Rep 2020; 10:12857. [PMID: 32732984 PMCID: PMC7393499 DOI: 10.1038/s41598-020-69793-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 02/21/2020] [Accepted: 07/15/2020] [Indexed: 11/18/2022] Open
Abstract
The cattle tick, Rhipicephalus microplus, is a monoxenous tick that co-evolved with indicine cattle on the Indian subcontinent. It causes massive damage to livestock worldwide. Cattle breeds present heritable, contrasting phenotypes of tick loads, taurine breeds carrying higher loads of the parasite than indicine breeds. Thus, a useful model is available to analyze mechanisms that determine outcomes of parasitism. We sought to gain insights on these mechanisms and used RNA sequencing and Multidimensional Protein Identification Technology (MudPIT) to generate a transcriptome from whole larvae and salivary glands from nymphs, males and females feeding on genetically susceptible and resistant bovine hosts and their corresponding proteomes. 931,698 reads were annotated into 11,676 coding sequences (CDS), which were manually curated into 116 different protein families. Male ticks presented the most diverse armamentarium of mediators of parasitism. In addition, levels of expression of many genes encoding mediators of parasitism were significantly associated with the level and stage of host immunity and/or were temporally restricted to developmental stages of the tick. These insights should assist in developing novel, sustainable technologies for tick control.
Collapse
Affiliation(s)
- Gustavo R Garcia
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.,Superintendence of the São Paulo State Technical and Scientific Police, Ribeirão Preto, SP, Brazil
| | - José Marcos Chaves Ribeiro
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sandra Regina Maruyama
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.,Department of Genetics and Evolution, Center for Biological Sciences and Health, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Luiz Gustavo Gardinassi
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.,Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, GO, Brazil
| | - Kristina Nelson
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, VA, USA
| | - Beatriz R Ferreira
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.,Department of Maternal-Child Nursing and Public Health, Ribeirão Preto School of Nursing, USP, Ribeirão Preto, SP, Brazil
| | - Thales Galdino Andrade
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.,Department of Maternal-Child Nursing and Public Health, Ribeirão Preto School of Nursing, USP, Ribeirão Preto, SP, Brazil
| | - Isabel K Ferreira de Miranda Santos
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, SP, 14049-900, Brazil.
| |
Collapse
|
6
|
Maruyama SR, Carvalho B, González-Porta M, Rung J, Brazma A, Gustavo Gardinassi L, Ferreira BR, Banin TM, Veríssimo CJ, Katiki LM, de Miranda-Santos IKF. Blood transcriptome profile induced by an efficacious vaccine formulated with salivary antigens from cattle ticks. NPJ Vaccines 2019; 4:53. [PMID: 31871773 PMCID: PMC6920353 DOI: 10.1038/s41541-019-0145-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/13/2019] [Indexed: 12/11/2022] Open
Abstract
Ticks cause massive damage to livestock and vaccines are one sustainable alternative for the acaricide poisons currently heavily used to control infestations. An experimental vaccine adjuvanted with alum and composed by four recombinant salivary antigens mined with reverse vaccinology from a transcriptome of salivary glands from Rhipicephalus microplus ticks was previously shown to present an overall efficacy of 73.2% and cause a significant decrease of tick loads in artificially tick-infested, immunized heifers; this decrease was accompanied by increased levels of antigen-specific IgG1 and IgG2 antibodies, which were boosted during a challenge infestation. In order to gain insights into the systemic effects induced by the vaccine and by the tick challenge we now report the gene expression profile of these hosts' whole-blood leukocytes with RNA-seq followed by functional analyses. These analyses show that vaccination induced unique responses to infestations; genes upregulated in the comparisons were enriched for processes associated with chemotaxis, cell adhesion, T-cell responses and wound repair. Blood transcriptional modules were enriched for activation of dendritic cells, cell cycle, phosphatidylinositol signaling, and platelets. Together, the results indicate that by neutralizing the tick's salivary mediators of parasitism with vaccine-induced antibodies, the bovine host is able to mount normal homeostatic responses that hinder tick attachment and haematophagy and that the tick otherwise suppresses with its saliva.
Collapse
Affiliation(s)
- Sandra R. Maruyama
- Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP Brazil
- Present Address: Department of Genetics and Evolution, Center for Biological Sciences and Health, Federal University of São Carlos, São Carlos, SP Brazil
| | | | - Mar González-Porta
- European Molecular Biology Laboratory, European Bioinformatics Institute, EMBL-EBI, Hinxton, UK
- Present Address: Illumina Centre, Cambridge, UK
| | - Johan Rung
- European Molecular Biology Laboratory, European Bioinformatics Institute, EMBL-EBI, Hinxton, UK
- Present Address: Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Alvis Brazma
- European Molecular Biology Laboratory, European Bioinformatics Institute, EMBL-EBI, Hinxton, UK
| | - Luiz Gustavo Gardinassi
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Beatriz R. Ferreira
- Ribeirão Preto School of Nursing, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Tamy M. Banin
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | | | | | | |
Collapse
|
7
|
Ferreira BR, Ramos L, Cardoso JC, Reis JP, Tellechea O. Hypopigmented patches in childhood: do not forget mycosis fungoides. Clin Exp Dermatol 2018; 44:588-589. [PMID: 30294791 DOI: 10.1111/ced.13807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2018] [Indexed: 11/28/2022]
Affiliation(s)
- B R Ferreira
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - L Ramos
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J C Cardoso
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J P Reis
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - O Tellechea
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| |
Collapse
|
8
|
Ferreira BR, Brites MM, Cardoso JC, Reis JP. Pulmonary adenocarcinoma diagnosed by incisional skin metastasis in an old scar from a non-neoplastic surgery. Clin Exp Dermatol 2017; 42:686-689. [PMID: 28614598 DOI: 10.1111/ced.13142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2016] [Indexed: 12/01/2022]
Affiliation(s)
- B R Ferreira
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - M M Brites
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J C Cardoso
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J P Reis
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| |
Collapse
|
9
|
Maruyama SR, Garcia GR, Teixeira FR, Brandão LG, Anderson JM, Ribeiro JMC, Valenzuela JG, Horackova J, Veríssimo CJ, Katiki LM, Banin TM, Zangirolamo AF, Gardinassi LG, Ferreira BR, de Miranda-Santos IKF. Mining a differential sialotranscriptome of Rhipicephalus microplus guides antigen discovery to formulate a vaccine that reduces tick infestations. Parasit Vectors 2017; 10:206. [PMID: 28446245 PMCID: PMC5406933 DOI: 10.1186/s13071-017-2136-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [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: 10/08/2016] [Accepted: 04/11/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ticks cause massive damage to livestock and vaccines are one sustainable substitute for the acaricides currently heavily used to control infestations. To guide antigen discovery for a vaccine that targets the gamut of parasitic strategies mediated by tick saliva and enables immunological memory, we exploited a transcriptome constructed from salivary glands from all stages of Rhipicephalus microplus ticks feeding on genetically tick-resistant and susceptible bovines. RESULTS Different levels of host anti-tick immunity affected gene expression in tick salivary glands; we thus selected four proteins encoded by genes weakly expressed in ticks attempting to feed on resistant hosts or otherwise abundantly expressed in ticks fed on susceptible hosts; these sialoproteins mediate four functions of parasitism deployed by male ticks and that do not induce antibodies in naturally infected, susceptible bovines. We then evaluated in tick-susceptible heifers an alum-adjuvanted vaccine formulated with recombinant proteins. Parasite performance (i.e. weight and numbers of females finishing their parasitic cycle) and titres of antigen-specific antibodies were significantly reduced or increased, respectively, in vaccinated versus control heifers, conferring an efficacy of 73.2%; two of the antigens were strong immunogens, rich in predicted T-cell epitopes and challenge infestations boosted antibody responses against them. CONCLUSION Mining sialotranscriptomes guided by the immunity of tick-resistant hosts selected important targets and infestations boosted immune memory against salivary antigens.
Collapse
Affiliation(s)
- Sandra R Maruyama
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Gustavo R Garcia
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Felipe R Teixeira
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Lucinda G Brandão
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil.,LGB: Faculdade de Tecnologia de Araçatuba, Araçatuba, SP, 16052045, Brazil
| | - Jennifer M Anderson
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20852, USA
| | - José M C Ribeiro
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20852, USA
| | - Jesus G Valenzuela
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20852, USA
| | - Jana Horackova
- Faculty of Biological Sciences, University of South Bohemia, Ceske Budejovice, 37005, Czech Republic
| | | | - Luciana M Katiki
- São Paulo Institute of Animal Science, Nova Odessa, SP, 13460-000, Brazil
| | - Tamy M Banin
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Amanda F Zangirolamo
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Luiz G Gardinassi
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil.,LGG: Division of Pulmonary Allergy & Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Beatriz R Ferreira
- Ribeirão Preto School of Nursing, University of São Paulo, Ribeirão Preto, SP, 14049-902, Brazil
| | - Isabel K F de Miranda-Santos
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil.
| |
Collapse
|
10
|
Oliveira CJ, Anatriello E, de Miranda-Santos IK, Francischetti IM, Sá-Nunes A, Ferreira BR, Ribeiro JMC. Proteome of Rhipicephalus sanguineus tick saliva induced by the secretagogues pilocarpine and dopamine. Ticks Tick Borne Dis 2013; 4:469-77. [PMID: 24029695 DOI: 10.1016/j.ttbdis.2013.05.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 04/17/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
Abstract
One dimensional gel electrophoresis was used to separate proteins from the saliva of Rhipicephalus sanguineus female ticks fed on rabbits. Gel slices were subjected to tryptic digestion and analyzed by reversed-phase HPLC followed by MS/MS analysis. The data were compared to a database of salivary proteins of the same tick and to the predicted proteins of the host. Saliva was obtained by either pilocarpine or dopamine stimulation of partially fed ticks. Electrophoretic separations of both yielded products that were identified by mass spectrometry, although the pilocarpine-derived sample was of much better quality. The majority of identified proteins were of rabbit origin, indicating the recycling of the host proteins in the tick saliva, including hemoglobin, albumin, haptoglobin, transferring, and a plasma serpin. The few proteins found that were previously associated with parasitism and blood feeding include 2 glycine-rich, cement-like proteins, 2 lipocalins, and a thyropin protease inhibitor. Among other of the 19 tick proteins identified, albeit with undefined roles, were SPARC and cyclophilin A. This catalog provides a resource that can be mined for secreted molecules that play a role in tick-host interactions.
Collapse
Affiliation(s)
- C J Oliveira
- Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro, Uberaba, MG 38025-180, Brazil
| | | | | | | | | | | | | |
Collapse
|
11
|
Oliveira CJF, Sá-Nunes A, Francischetti IMB, Carregaro V, Anatriello E, Silva JS, Santos IKFDM, Ribeiro JMC, Ferreira BR. Deconstructing tick saliva: non-protein molecules with potent immunomodulatory properties. J Biol Chem 2011; 286:10960-9. [PMID: 21270122 DOI: 10.1074/jbc.m110.205047] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Dendritic cells (DCs) are powerful initiators of innate and adaptive immune responses. Ticks are blood-sucking ectoparasite arthropods that suppress host immunity by secreting immunomodulatory molecules in their saliva. Here, compounds present in Rhipicephalus sanguineus tick saliva with immunomodulatory effects on DC differentiation, cytokine production, and costimulatory molecule expression were identified. R. sanguineus tick saliva inhibited IL-12p40 and TNF-α while potentiating IL-10 cytokine production by bone marrow-derived DCs stimulated by Toll-like receptor-2, -4, and -9 agonists. To identify the molecules responsible for these effects, we fractionated the saliva through microcon filtration and reversed-phase HPLC and tested each fraction for DC maturation. Fractions with proven effects were analyzed by micro-HPLC tandem mass spectrometry or competition ELISA. Thus, we identified for the first time in tick saliva the purine nucleoside adenosine (concentration of ∼110 pmol/μl) as a potent anti-inflammatory salivary inhibitor of DC cytokine production. We also found prostaglandin E(2) (PGE(2) ∼100 nM) with comparable effects in modulating cytokine production by DCs. Both Ado and PGE(2) inhibited cytokine production by inducing cAMP-PKA signaling in DCs. Additionally, both Ado and PGE(2) were able to inhibit expression of CD40 in mature DCs. Finally, flow cytometry analysis revealed that PGE(2), but not Ado, is the differentiation inhibitor of bone marrow-derived DCs. The presence of non-protein molecules adenosine and PGE(2) in tick saliva indicates an important evolutionary mechanism used by ticks to subvert host immune cells and allow them to successfully complete their blood meal and life cycle.
Collapse
Affiliation(s)
- Carlo José F Oliveira
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Ferreira SB, Repeke CE, Raimundo FM, Nunes IS, Avila-Campos MJ, Ferreira BR, Santana da Silva J, Campanelli AP, Garlet GP. CCR5 mediates pro-osteoclastic and osteoclastogenic leukocyte chemoattraction. J Dent Res 2011; 90:632-7. [PMID: 21245464 DOI: 10.1177/0022034510395021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Periodontal disease (PD) progression involves the selective leukocyte infiltration into periodontium, supposedly mediated by the chemokine/chemokine receptor system. In this study, we investigated the role of chemokine receptor CCR5 in the immunoregulation of experimental PD in C57BL/6 (WT) and CCR5KO mice. Aggregatibacter actinomycetem comitans infection triggered the chemoattraction of distinct CCR5+ leukocyte subpopulations (determined by flow cytometry): CCR5+F4/80+ leukocytes, which co-express CD14 , CCR2, TNF-α, and IL-1β, indicative of activated macrophages; and CCR5+CD4+ cells, which co-express CXCR3, IFN-γ, and RANKL, indicative of Th1 lymphocytes, therefore comprising pro-osteoclastic and osteoclastogenic cell subsets, respectively. CCR5KO mice presented a lower PD severity (lower inflammation and alveolar bone loss) when compared with the WT strain, since the migration of F4/80+, TNF-α+, CD4+, and RANKL+ cells specifically decreased due to the lack of CCR5. Also, ELISA analysis demonstrated that the production of TNF-α, IL-1β, IL-6, IFN-γ, and RANKL in periodontal tissues was significantly decreased in the CCR5KO strain. The periodontal bacterial load and antimicrobial patterns were unaltered in CCR5KO mice. Our results demonstrate that the chemokine receptor is involved in the migration of distinct leukocyte subpopulations throughout experimental PD, being a potential target for therapeutic intervention in PD.
Collapse
Affiliation(s)
- S B Ferreira
- OSTEOimmunology lab, Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University-FOB/USP, Al. Octávio Pinheiro Brisola, 9-75-CEP 17012-901, Bauru, SP, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Anatriello E, Ribeiro JMC, de Miranda-Santos IKF, Brandão LG, Anderson JM, Valenzuela JG, Maruyama SR, Silva JS, Ferreira BR. An insight into the sialotranscriptome of the brown dog tick, Rhipicephalus sanguineus. BMC Genomics 2010; 11:450. [PMID: 20650005 PMCID: PMC3091647 DOI: 10.1186/1471-2164-11-450] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [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: 12/15/2009] [Accepted: 07/22/2010] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Rhipicephalus sanguineus, known as the brown dog tick, is a common ectoparasite of domestic dogs and can be found worldwide. R.sanguineus is recognized as the primary vector of the etiological agent of canine monocytic ehrlichiosis and canine babesiosis. Here we present the first description of a R. sanguineus salivary gland transcriptome by the production and analysis of 2,034 expressed sequence tags (EST) from two cDNA libraries, one consctructed using mRNA from dissected salivary glands from female ticks fed for 3-5 days (early to mid library, RsSGL1) and the another from ticks fed for 5 days (mid library, RsSGL2), identifying 1,024 clusters of related sequences. RESULTS Based on sequence similarities to nine different databases, we identified transcripts of genes that were further categorized according to function. The category of putative housekeeping genes contained approximately 56% of the sequences and had on average 2.49 ESTs per cluster, the secreted protein category contained 26.6% of the ESTs and had 2.47 EST's/clusters, while 15.3% of the ESTs, mostly singletons, were not classifiable, and were annotated as "unknown function". The secreted category included genes that coded for lipocalins, proteases inhibitors, disintegrins, metalloproteases, immunomodulatory and antiinflammatory proteins, as Evasins and Da-p36, as well as basic-tail and 18.3 kDa proteins, cement proteins, mucins, defensins and antimicrobial peptides. Comparison of the abundance of ESTs from similar contigs of the two salivary gland cDNA libraries allowed the identification of differentially expressed genes, such as genes coding for Evasins and a thrombin inhibitor, which were over expressed in the RsSGL1 (early to mid library) versus RsSGL2 (mid library), indicating their role in inhibition of inflammation at the tick feeding site from the very beginning of the blood meal. Conversely, sequences related to cement (64P), which function has been correlated with tick attachment, was largely expressed in the mid library. CONCLUSIONS Our survey provided an insight into the R. sanguineus sialotranscriptome, which can assist the discovery of new targets for anti-tick vaccines, as well as help to identify pharmacologically active proteins.
Collapse
Affiliation(s)
- Elen Anatriello
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
| | - José MC Ribeiro
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-8132, USA
| | - Isabel KF de Miranda-Santos
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
- Embrapa Recursos Genéticos e Biotecnologia, 70770-900, Brasília, DF, Brazil
| | - Lucinda G Brandão
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
- Universidade Paulista, Avenida Baguaçu, 1939, 16018-280, Araçatuba, SP, Brasil
| | - Jennifer M Anderson
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-8132, USA
| | - Jesus G Valenzuela
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-8132, USA
| | - Sandra R Maruyama
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
| | - João S Silva
- Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
| | - Beatriz R Ferreira
- Department of Maternal and Child and Public Health Nursing, Ribeirão Preto School of Nursing, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
| |
Collapse
|
14
|
Maruyama SR, Anatriello E, Anderson JM, Ribeiro JM, Brandão LG, Valenzuela JG, Ferreira BR, Garcia GR, Szabó MP, Patel S, Bishop R, de Miranda-Santos IK. The expression of genes coding for distinct types of glycine-rich proteins varies according to the biology of three metastriate ticks, Rhipicephalus (Boophilus) microplus, Rhipicephalus sanguineus and Amblyomma cajennense. BMC Genomics 2010; 11:363. [PMID: 20529354 PMCID: PMC2901319 DOI: 10.1186/1471-2164-11-363] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [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: 12/14/2009] [Accepted: 06/08/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ticks secrete a cement cone composed of many salivary proteins, some of which are rich in the amino acid glycine in order to attach to their hosts' skin. Glycine-rich proteins (GRPs) are a large family of heterogeneous proteins that have different functions and features; noteworthy are their adhesive and tensile characteristics. These properties may be essential for successful attachment of the metastriate ticks to the host and the prolonged feeding necessary for engorgement. In this work, we analyzed Expressed Sequence Tags (ESTs) similar to GRPs from cDNA libraries constructed from salivary glands of adult female ticks representing three hard, metastriate species in order to verify if their expression correlated with biological differences such as the numbers of hosts ticks feed on during their parasitic life cycle, whether one (monoxenous parasite) or two or more (heteroxenous parasite), and the anatomy of their mouthparts, whether short (Brevirostrata) or long (Longirostrata). These ticks were the monoxenous Brevirostrata tick, Rhipicephalus (Boophilus) microplus, a heteroxenous Brevirostrata tick, Rhipicephalus sanguineus, and a heteroxenous Longirostrata tick, Amblyomma cajennense. To further investigate this relationship, we conducted phylogenetic analyses using sequences of GRPs from these ticks as well as from other species of Brevirostrata and Longirostrata ticks. RESULTS cDNA libraries from salivary glands of the monoxenous tick, R. microplus, contained more contigs of glycine-rich proteins than the two representatives of heteroxenous ticks, R. sanguineus and A. cajennense (33 versus, respectively, 16 and 11). Transcripts of ESTs encoding GRPs were significantly more numerous in the salivary glands of the two Brevirostrata species when compared to the number of transcripts in the Longirostrata tick. The salivary gland libraries from Brevirostrata ticks contained numerous contigs significantly similar to silks of true spiders (17 and 8 in, respectively, R. microplus and R. sanguineus), whereas the Longirostrata tick contained only 4 contigs. The phylogenetic analyses of GRPs from various species of ticks showed that distinct clades encoding proteins with different biochemical properties are represented among species according to their biology. CONCLUSIONS We found that different species of ticks rely on different types and amounts of GRPs in order to attach and feed on their hosts. Metastriate ticks with short mouthparts express more transcripts of GRPs than a tick with long mouthparts and the tick that feeds on a single host during its life cycle contain a greater variety of these proteins than ticks that feed on several hosts.
Collapse
Affiliation(s)
- Sandra R Maruyama
- Departament of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP 14049-900, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Oliveira CJF, Carvalho WA, Garcia GR, Gutierrez FRS, de Miranda Santos IKF, Silva JS, Ferreira BR. Tick saliva induces regulatory dendritic cells: MAP-kinases and Toll-like receptor-2 expression as potential targets. Vet Parasitol 2009; 167:288-97. [PMID: 19836139 DOI: 10.1016/j.vetpar.2009.09.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Ticks (Acari: Ixodidae) are bloodsucking ectoparasitic arthropods of human and veterinary medical importance. Tick saliva has been shown to contain a wide range of bioactive molecules with vasodilatory, antihemostatic, and immunomodulatory activities. We have previously demonstrated that saliva from Rhipicephalus sanguineus ticks inhibits the maturation of dendritic cells (DCs) stimulated with LPS. Here we examined the mechanism of this immune subversion, evaluating the effect of tick saliva on Toll-like receptor (TLR)-4 signalling pathway in bone marrow-derived DCs. We demonstrated that R. sanguineus tick saliva impairs maturation of DCs stimulated with LPS, a TLR-4 ligand, leading to increased production of interleukin (IL)-10 and reduced synthesis of IL-12p70 and TNF-alpha. The immunomodulatory effect of the tick saliva on the production of pro-inflammatory cytokines by DCs stimulated with LPS was associated with the observation that tick saliva inhibits the activation of the ERK 1/2 and p38 MAP kinases. These effects were independent of the expression of TLR-4 on the surface of DCs. Additionally, saliva-treated DCs also presented a similar pattern of cytokine modulation in response to other TLR ligands. Since the recent literature reports that several parasites evade immune responses through TLR-2-mediated production of IL-10, we evaluated the effect of tick saliva on the percentage of TLR-2(+) DCs stimulated with the TLR-2 ligand lipoteicoic acid (LTA). The data showed that the population of DCs expressing TLR-2 was significantly increased in DCs treated with LTA plus saliva. In addition, tick saliva alone increased the expression of TLR-2 in a dose- and time-dependent manner. Our data suggest that tick saliva induces regulatory DCs, which secrete IL-10 and low levels of IL-12 and TNF-alpha when stimulated by TLR ligands. Such regulatory DCs are associated with expression of TLR-2 and inhibition of ERK and p38, which promotes the production of IL-10 and thus down-modulates the host's immune response, possibly favouring susceptibility to tick infestations.
Collapse
Affiliation(s)
- Carlo José F Oliveira
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, SP, Brazil
| | | | | | | | | | | | | |
Collapse
|
16
|
Cardoso CR, Provinciatto PR, Godoi DF, Ferreira BR, Teixeira G, Rossi MA, Cunha FQ, Silva JS. IL-4 regulates susceptibility to intestinal inflammation in murine food allergy. Am J Physiol Gastrointest Liver Physiol 2009; 296:G593-600. [PMID: 19136382 DOI: 10.1152/ajpgi.90431.2008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Allergies involve a state of immediate hypersensitivity to antigens, including food proteins. The mechanism underlying the initiation and development of allergic responses involves IL-4 that directly induces the differentiation of committed effector Th2 lymphocytes. Although it is clear that Th2 responses play a pivotal role in the development of allergic responses, it remains unclear which mechanisms are involved in the development of the intestinal damages observed in food allergy. Accordingly, this work aimed to study the role of Th2/IL-4-dependent responses in the development of food allergy and intestinal pathology. C57BL/6 wild-type (WT) and IL-4-/- mice were sensitized with peanut proteins, challenged with peanut seeds, and followed for the development of food allergy and intestinal inflammation. Results demonstrated that exposure to peanut seeds led to weight loss in WT but not in IL-4-/- mice that preserved gut integrity with no signs of mucosal inflammation. These animals presented increased levels of IgG2a in sera, suggesting a role for allergic antibodies in the pathogenesis of WT animals. Most importantly, results also showed that lack of IL-4 modulated gut mucosal response in food allergy through diminished expression of TNF-alpha mRNA, increased Th1 IFN-gamma, IL-12p40, regulatory cytokines, and Foxp3, demonstrating their relevance in the control of allergic inflammatory processes, especially in the intestine. Finally, this study highlighted some of the complex mechanisms involved in the pathogenesis of allergic responses to food antigens in the gut, thereby providing valuable tools for directing novel therapeutic or preventive strategies to the control of allergic enteropathy.
Collapse
Affiliation(s)
- Cristina R Cardoso
- School of Medicine of Ribeirão Preto, University of São Paulo, Department of Biochemistry and Immunology, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Cardoso CR, Provinciatto PR, Godoi DF, Vieira TS, Ferreira BR, Teixeira G, Rossi MA, Cunha FQ, Silva JS. B cells are involved in the modulation of pathogenic gut immune response in food-allergic enteropathy. Clin Exp Immunol 2008; 154:153-61. [PMID: 18778361 DOI: 10.1111/j.1365-2249.2008.03748.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Food enteropathies involve uncontrolled or hypersensitivity reactions to ingested nutrients and may result in IgE and T-helper type 2 (Th2) responses as in food allergy. However, the precise role of B cells in the development of food enteropathies remains uncertain. In this work, we used B cell-deficient mice (B KO) and a model of peanut sensitization to examine the involvement of B lymphocytes in the pathogenesis of food allergy. Results showed that priming of wild-type (WT) mice with peanut proteins induced specific IgG1 and IgE responses in serum, with edema, tissue destruction, epithelial exulceration and inflammatory infiltrate in the gut of sensitized and challenged (S + Peanut) WT animals. In contrast, there was no sera immunoglobulin detection and absence of tissue destruction in the gut of B KO mice, which presented moderate inflammatory infiltrate and villous enlargement after peanut challenge. These animals presented marked decrease in IL-4 and TNF-alpha and high levels of IL-10, TGF-beta, IL-12p40 and IFN-gamma mRNA in the gut. Moreover, the expression of CCL5, CCL11 and CXCL1 was reduced in the gut of B KO mice, in contrast to elevated messages of CCL2 or similar detection of Th1-related chemokines in S + Peanut WT mice. Finally, we provided evidence that B cells are necessary to the development of food-related enteropathies and induction of gut inflammation during allergic reactions to food.
Collapse
Affiliation(s)
- C R Cardoso
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeiráo Preto, SP, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Déruaz M, Frauenschuh A, Alessandri AL, Dias JM, Coelho FM, Russo RC, Ferreira BR, Graham GJ, Shaw JP, Wells TNC, Teixeira MM, Power CA, Proudfoot AEI. Ticks produce highly selective chemokine binding proteins with antiinflammatory activity. ACTA ACUST UNITED AC 2008; 205:2019-31. [PMID: 18678732 PMCID: PMC2526197 DOI: 10.1084/jem.20072689] [Citation(s) in RCA: 158] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Bloodsucking parasites such as ticks have evolved a wide variety of immunomodulatory proteins that are secreted in their saliva, allowing them to feed for long periods of time without being detected by the host immune system. One possible strategy used by ticks to evade the host immune response is to produce proteins that selectively bind and neutralize the chemokines that normally recruit cells of the innate immune system that protect the host from parasites. We have identified distinct cDNAs encoding novel chemokine binding proteins (CHPBs), which we have termed Evasins, using an expression cloning approach. These CHBPs have unusually stringent chemokine selectivity, differentiating them from broader spectrum viral CHBPs. Evasin-1 binds to CCL3, CCL4, and CCL18; Evasin-3 binds to CXCL8 and CXCL1; and Evasin-4 binds to CCL5 and CCL11. We report the characterization of Evasin-1 and -3, which are unrelated in primary sequence and tertiary structure, and reveal novel folds. Administration of recombinant Evasin-1 and -3 in animal models of disease demonstrates that they have potent antiinflammatory properties. These novel CHBPs designed by nature are even smaller than the recently described single-domain antibodies (Hollinger, P., and P.J. Hudson. 2005. Nat. Biotechnol. 23:1126–1136), and may be therapeutically useful as novel antiinflammatory agents in the future.
Collapse
Affiliation(s)
- Maud Déruaz
- Merck Serono Geneva Research Centre, 1202 Geneva, Switzerland
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Cardoso CR, Teixeira G, Provinciatto PR, Godoi DF, Ferreira BR, Milanezi CM, Ferraz DB, Rossi MA, Cunha FQ, Silva JS. Modulation of mucosal immunity in a murine model of food-induced intestinal inflammation. Clin Exp Allergy 2007; 38:338-49. [PMID: 18005184 DOI: 10.1111/j.1365-2222.2007.02866.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Hypersensitivity or uncontrolled responses against dietary antigens can lead to inflammatory disorders like food allergy and current models reflect a variety of causes but do not reveal the detailed modulation of gut immunity in response to food antigens after breakdown in mucosal tolerance. OBJECTIVE To develop and characterize a murine model for food-induced intestinal inflammation and to demonstrate the modulation of gut immune response by dietary allergenic antigens. METHODS C57BL/6 mice were sensitized with peanut proteins, challenged with peanut seeds and their sera and gut segments were collected for subsequent analyses. RESULTS Sensitization and challenged with peanut seeds led to alterations in gut architecture with inflammatory response characterized by oedema in lamina propria and cell infiltrate composed mainly by eosinophils, mast cells, phagocytes, natural killer and plasma cells, together with low percentage of gammadelta+ and CD4+CD25+Foxp3+ cells in Peyer's patches. These animals also presented high levels of specific IgE and IgG1 in sera and modulation of mucosal immunity was mediated by increased expression of GATA-3, IL-4, IL-13 and TNF-alpha in contrast to low IFN-gamma in the gut. CONCLUSION A murine model for food-induced intestinal inflammation was characterized in which modulation of gut immunity occurs by peanut antigens in consequence of T-helper type 2 (Th2) allergic response and failure of regulatory mechanisms necessary for mucosa homeostasis, resembling food allergy. This work shed some light on the understanding of the pathogenesis of gastrointestinal disorders and intolerance in the gut and supports the development of therapies for food-related enteropathies like food allergy, focusing on gut-specific immune response.
Collapse
Affiliation(s)
- C R Cardoso
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Frauenschuh A, Power CA, Déruaz M, Ferreira BR, Silva JS, Teixeira MM, Dias JM, Martin T, Wells TNC, Proudfoot AEI. Molecular Cloning and Characterization of a Highly Selective Chemokine-binding Protein from the Tick Rhipicephalus sanguineus. J Biol Chem 2007; 282:27250-27258. [PMID: 17640866 DOI: 10.1074/jbc.m704706200] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.1] [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: 11/06/2022] Open
Abstract
Ticks are blood-feeding parasites that secrete a number of immuno-modulatory factors to evade the host immune response. Saliva isolated from different species of ticks has recently been shown to contain chemokine neutralizing activity. To characterize this activity, we constructed a cDNA library from the salivary glands of the common brown dog tick, Rhipicephalus sanguineus. Pools of cDNA clones from the library were transfected into HEK293 cells, and the conditioned media from the transfected cells were tested for chemokine binding activity by chemical cross-linking to radiolabeled CCL3 followed by SDS-PAGE. By de-convolution of a single positive pool of 270 clones, we identified a full-length cDNA encoding a protein of 114 amino acids, which after signal peptide cleavage was predicted to yield a mature protein of 94 amino acids that we called Evasin-1. Recombinant Evasin-1 was produced in HEK293 cells and in insect cells. Using surface plasmon resonance we were able to show that Evasin-1 was exquisitely selective for 3 CC chemokines, CCL3 and CCL4 and the closely related chemokine CCL18, with K(D) values of 0.16, 0.81, and 3.21 nm, respectively. The affinities for CCL3 and CCL4 were confirmed in competition receptor binding assays. Analysis by size exclusion chromatography demonstrated that Evasin-1 was monomeric and formed a 1:1 complex with CCL3. Thus, unlike the other chemokine-binding proteins identified to date from viruses and from the parasitic worm Schistosoma mansoni, Evasin-1 is highly specific for a subgroup of CC chemokines, which may reflect a specific role for these chemokines in host defense against parasites.
Collapse
Affiliation(s)
| | | | - Maud Déruaz
- Merck Serono Geneva Research Centre, CH-1211 Geneva, Switzerland
| | - Beatriz R Ferreira
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, USP, São Paulo, SP14049-900, Brazil, and
| | - João S Silva
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, USP, São Paulo, SP14049-900, Brazil, and
| | - Mauro M Teixeira
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, B1270-901, Brazil
| | - João M Dias
- Merck Serono Geneva Research Centre, CH-1211 Geneva, Switzerland
| | - Thierry Martin
- Merck Serono Geneva Research Centre, CH-1211 Geneva, Switzerland
| | | | | |
Collapse
|
21
|
Garlet GP, Cardoso CRB, Campanelli AP, Ferreira BR, Avila-Campos MJ, Cunha FQ, Silva JS. The dual role of p55 tumour necrosis factor-alpha receptor in Actinobacillus actinomycetemcomitans-induced experimental periodontitis: host protection and tissue destruction. Clin Exp Immunol 2007; 147:128-38. [PMID: 17177972 PMCID: PMC1810448 DOI: 10.1111/j.1365-2249.2006.03260.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2006] [Indexed: 11/30/2022] Open
Abstract
Inflammatory immune reactions in response to periodontopathogens are thought to protect the host against infection, but may trigger periodontal destruction. Thus, we examined the mechanisms by which the proinflammatory cytokine tumour necrosis factor (TNF)-alpha modulates the outcome of Actinobacillus actinomycetemcomitans-induced periodontal disease in mice. Our results showed that TNF-alpha receptor p55-deficient mice [p55TNF-knock-out (KO)] developed a less severe periodontitis in response to A. actinomycetemcomitans infection, characterized by significantly less alveolar bone loss and inflammatory reaction. Real-time polymerase chain reaction (PCR) demonstrated that levels of chemokines (CXCL1, 3 and 10; CCL3 and 5) and their receptors (CXCR2 and 3, CCR5) were lower in p55TNF-KO mice, as were matrix metalloproteinase (MMP)-1, 2 and 9 and receptor activator of nuclear factor kB ligand (RANKL) mRNA levels. However, the absence of the TNF-alpha p55 results in an impairment of protective immunity to A. actinomycetemcomitans infection, characterized by increased bacterial load and higher levels of C-reactive protein during the course of disease. Such impaired host response may be the result of the reduced chemoattraction of lymphocytes, neutrophils and macrophages, and reduced inducible nitric oxide synthase expression (iNOS) and myeloperoxidase (MPO) production in periodontal tissues of p55 TNF-KO mice. Our results demonstrate the mechanisms involved determining periodontal disease severity by TNF-alpha receptor p55, and its role in providing immune protection to A. actinomycetemcomitans periodontal infection.
Collapse
MESH Headings
- Actinobacillus Infections/immunology
- Actinobacillus Infections/pathology
- Aggregatibacter actinomycetemcomitans/immunology
- Alveolar Bone Loss
- Animals
- Antibodies, Bacterial/blood
- C-Reactive Protein/analysis
- Chemokine CCL5
- Chemokine CXCL1
- Chemokine CXCL10
- Chemokines, CC/analysis
- Chemokines, CC/genetics
- Chemokines, CXC/analysis
- Chemokines, CXC/genetics
- DNA Primers/genetics
- Enzyme-Linked Immunosorbent Assay/methods
- Flow Cytometry
- Interferon-gamma/analysis
- Interferon-gamma/genetics
- Interleukin-10/blood
- Interleukin-10/genetics
- Interleukin-1beta/analysis
- Interleukin-1beta/genetics
- Matrix Metalloproteinases/analysis
- Matrix Metalloproteinases/genetics
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Periodontitis/immunology
- Periodontitis/pathology
- Periodontium/immunology
- Periodontium/pathology
- Peroxidase/analysis
- RANK Ligand/analysis
- RANK Ligand/genetics
- Receptors, CCR5/analysis
- Receptors, CCR5/genetics
- Receptors, CXCR3
- Receptors, Chemokine/analysis
- Receptors, Chemokine/genetics
- Receptors, Interleukin-8B/analysis
- Receptors, Interleukin-8B/genetics
- Receptors, Tumor Necrosis Factor, Type I/immunology
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Tumor Necrosis Factor Decoy Receptors/immunology
- Tumor Necrosis Factor Decoy Receptors/metabolism
- Tumor Necrosis Factor-alpha/immunology
Collapse
Affiliation(s)
- G P Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, Bauru, Brazil.
| | | | | | | | | | | | | |
Collapse
|
22
|
Moreira AP, Campanelli AP, Cavassani KA, Souto JT, Ferreira BR, Martinez R, Rossi MA, Silva JS. Intercellular adhesion molecule-1 is required for the early formation of granulomas and participates in the resistance of mice to the infection with the fungus Paracoccidioides brasiliensis. Am J Pathol 2006; 169:1270-81. [PMID: 17003484 PMCID: PMC1698859 DOI: 10.2353/ajpath.2006.060271] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The migration of leukocytes to inflammatory sites elicited by Paracoccidioides brasiliensis is supposed to be coordinated by cytokines and chemokines. Here, we investigated the role of intercellular adhesion molecule-1 (ICAM-1) in recruiting inflammatory cells to lungs of mice infected with P. brasiliensis and in determining the outcome of the disease. Expression of ICAM-1 was up-regulated on T lymphocytes after infection with the fungus, and its expression was dependent on interferon-gamma, tumor necrosis factor-alpha, and interleukin-12. Moreover, the absence of ICAM-1 resulted in high susceptibility to the infection and delayed formation of granulomatous lesions. In addition, the absence of ICAM-1 resulted in increased growth and dissemination of fungus, decreased number of CD3+CD4+ and CD3+CD8+ T cells, and increased production of interleukin-4 in the inflammatory site. The organization of a granulomatous reaction in mice deficient of ICAM-1 was delayed, starting only on day 60 after infection, whereas in wild-type mice it was complete on day 30 of infection. These data show that ICAM-1 is effectively involved in cellular migration and in the organization of the granulomatous lesion caused by the fungus P. brasiliensis.
Collapse
Affiliation(s)
- Ana P Moreira
- School of Medicine of Ribeirão Preto-USP, Department of Biochemistry and Immunology, Av. Bandeirantes, 3900, 14049-900, Ribeirão Preto, SP, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Garlet GP, Cardoso CR, Silva TA, Ferreira BR, Avila-Campos MJ, Cunha FQ, Silva JS. Cytokine pattern determines the progression of experimental periodontal disease induced by Actinobacillus actinomycetemcomitans through the modulation of MMPs, RANKL, and their physiological inhibitors. ACTA ACUST UNITED AC 2006; 21:12-20. [PMID: 16390336 DOI: 10.1111/j.1399-302x.2005.00245.x] [Citation(s) in RCA: 160] [Impact Index Per Article: 8.9] [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: 11/26/2022]
Abstract
OBJECTIVE Inflammatory and immune reactions raised in response to periodontopathogens are thought to trigger periodontal tissue destruction. We therefore investigated the expression of matrix metalloproteinases (MMPs) and the osteoclastogenic factor RANKL (receptor activator of nuclear factor-kappaB ligand), their respective inhibitors TIMPs (tissue inhibitors of metalloproteinases) and OPG (osteoprotegerin) and their possible correlation with the expression of inflammatory and regulatory cytokines in the course of experimental periodontal disease in mice. METHODS We characterized the time course of leukocyte migration and alveolar bone loss in C57BL/6 mice infected with Actinobacillus actinomycetemcomitans. Quantitative polymerase chain reaction (RealTime PCR) and ELISA were performed to determine the expression of MMPs, TIMPs, RANKL, OPG and cathepsin K, interleukin-1beta, tumor necrosis factor-alpha, interferon-gamma, interleukin-12, interleukin-4 and interleukin-10 in periodontal tissue samples harvested throughout the course of experimental disease. RESULTS Oral inoculation of A. actinomycetemcomitans results in an intense and widespread migration of leukocytes to the gingival tissues, besides marked alveolar bone resorption. Our data also demonstrate two distinct patterns of MMP/TIMP and RANKL/OPG expression in the course of experimental periodontal disease. The expression of MMPs (MMP-1, 2 and 9) and RANKL was correlated with the expression of interleukin-1beta, tumor necrosis factor-alpha and interferon-gamma, in a time period characterized by the intense increase of inflammatory reaction and alveolar bone loss. On the other hand, interleukin-4 and interleukin-10 were associated with higher expression of TIMPs (TIMP 1, 2 and 3) and OPG, with a lower expression of MMPs and RANKL, and with reduced rates of increase of cellular infiltration in periodontal tissues and alveolar bone loss. CONCLUSIONS It is possible that the pattern of cytokines produced in periodontal tissues determines the progression and the severity of experimental periodontal disease, controlling the breakdown of soft and bone tissues through the balance between MMPs/TIMP and RANKL/OPG expression in gingival tissues.
Collapse
Affiliation(s)
- G P Garlet
- Department of Biochemistry and Immunology, School of Medicine-USP, Ribeirao Preto, SP, Brazil.
| | | | | | | | | | | | | |
Collapse
|
24
|
Garlet GP, Avila-Campos MJ, Milanezi CM, Ferreira BR, Silva JS. Actinobacillus actinomycetemcomitans-induced periodontal disease in mice: patterns of cytokine, chemokine, and chemokine receptor expression and leukocyte migration. Microbes Infect 2005; 7:738-47. [PMID: 15850760 DOI: 10.1016/j.micinf.2005.01.012] [Citation(s) in RCA: 66] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2004] [Revised: 01/25/2005] [Accepted: 01/25/2005] [Indexed: 01/20/2023]
Abstract
Although the pathogenesis of periodontal disease (PD) is not well known, cytokines, chemotactic factors and inflammatory cells are certainly involved in the disease outcome. Here, we characterized the evolution of the PD induced by Actinobacillus actinomycetemcomitans in mice, showing that oral inoculation of these bacteria leads to the migration of leukocytes to periodontal tissues and marked alveolar bone resorption. We found the expression of pro-inflammatory and Th1-type cytokines including TNF-alpha, IFN-gamma and IL-12 in periodontal tissues after infection with A. actinomycetemcomitans, from the early stages after infection and throughout the course of the disease. Similar kinetics of expression were found for the chemokines CCL5, CCL4, CCL3 and CXCL10 and for the receptors CCR5 and CXCR3, all of them linked to the Th1-type pattern. The expression of the Th2-type mediators IL-10, CCL1 and their receptors CCR4 and CCR8 was detected only after 30 days of infection, determining a time-dependent mixed pattern of polarized immune response. The chemokine expression was correlated with the presence of polymorphonuclear leukocytes, macrophages, CD4 and CD8 lymphocytes, and B cells in the inflammatory infiltrate. Interestingly, during the predominance of the Th1-type response, a sharp increase in the number of inflammatory cells and intense bone loss was seen. By contrast, after the increased expression of Th2-type mediators, the number of inflammatory cells remained constant. Our data demonstrate that mice subjected to oral inoculation of A. actinomycetemcomitans represent a useful model for the study of PD. In addition, our results suggest that expression of cytokines and chemokines can drive the selective recruitment of leukocyte subsets to periodontal tissues, which could determine the stable or progressive nature of the lesion.
Collapse
Affiliation(s)
- Gustavo P Garlet
- School of Medicine-USP, Department of Biochemistry and Immunology, Avenue Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | | | | | | | | |
Collapse
|
25
|
Cavassani KA, Aliberti JC, Dias ARV, Silva JS, Ferreira BR. Tick saliva inhibits differentiation, maturation and function of murine bone-marrow-derived dendritic cells. Immunology 2005; 114:235-45. [PMID: 15667568 PMCID: PMC1782083 DOI: 10.1111/j.1365-2567.2004.02079.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [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: 11/29/2022] Open
Abstract
Haematophagous arthropod vectors such as mosquitoes, tsetse flies, sandflies and ticks have evolved salivary immunomodulatory factors that prevent the vertebrate host from rejecting them meanwhile enhancing pathogen transmission. As dendritic cells (DC) play a major role in host immune responses, we studied the effects of Rhipicephalus sanguineus tick saliva on DC differentiation and maturation. Flow cytometry analysis revealed that the addition of saliva to bone marrow cells inhibits the differentiation of DC and decreased the population of differentiated immature DC, increasing the levels of major histocompatibility complex (MHC) class II while not altering the expression of costimulatory (CD40, CD80 and CD86) and adhesion (CD54) molecules. Furthermore, maturation of DC stimulated by lipopolysaccharide (LPS) in the presence of saliva resulted in a lower expression of costimulatory molecules, but did not alter the up-regulation of MHC class II and CD54. The lipopolysaccharide (LPS)-matured DC cultured with saliva also presented reduced production of interleukin-12, whereas interleukin-10 production was unaltered. Assessment of the function of DC cultured with tick saliva revealed them to be poor stimulators of cytokine production by antigen-specific T cells. Our data indicate a novel modulatory role for the saliva of arthropod vectors at an initial step of the immune response through the inhibition of differentiation and maturation of DC into functional antigen-presenting cells.
Collapse
Affiliation(s)
- Karen A Cavassani
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | | | | |
Collapse
|
26
|
Machado FS, Koyama NS, Carregaro V, Ferreira BR, Milanezi CM, Teixeira MM, Rossi MA, Silva J. CCR5 plays a critical role in the development of myocarditis and host protection in mice infected with Trypanosoma cruzi. J Infect Dis 2005; 191:627-36. [PMID: 15655788 PMCID: PMC7109658 DOI: 10.1086/427515] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [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: 06/25/2004] [Accepted: 08/15/2004] [Indexed: 01/18/2023] Open
Abstract
The pathogenesis of myocarditis during Trypanosoma cruzi infection is poorly understood. We investigated the role played by chemokine receptor 5 (CCR5) in the influx of T cells to the cardiac tissue of T. cruzi—infected mice. mRNA and protein for the CCR5 ligands CCL3, CCL4, and CCL5 were detected in the hearts of infected mice in association with CD4+ and CD8+ T cells. There was a high level of CCR5 expression on CD8+ T cells in the hearts of infected mice. Moreover, CCR5 expression on CD8+ T cells was positively modulated by T. cruzi infection. CCR5-deficient mice infected with T. cruzi experienced a dramatically inhibited migration of T cells to the heart and were also more susceptible to infection. These results suggest that CCR5 and its ligands play a central role in the control of T cell influx in T. cruzi-infected mice. Knowledge of the mechanisms that trigger and control the migration of cells to the heart in patients with Chagas disease may help in the design of drugs that prevent myocarditis and protect against the development of severe disease.
Collapse
Affiliation(s)
| | - Natalia S. Koyama
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
| | - Vanessa Carregaro
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
| | | | | | - Mauro M. Teixeira
- Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos A.i Rossi
- Department of Pathology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo
| | - João Silva
- Department of Biochemistry and Immunology, Ribeirão Preto, São Paulo
- Reprints or correspondence: João S. Silva, Dept. of Biochemistry and Immunology, School of Medicine of Ribeirão Preto-USP, Av. Bandeirantes, 3900, 14049-900 Ribeirèo Preto, SP, Brazil ()
| |
Collapse
|
27
|
Santos IKFDM, Valenzuela JG, Ribeiro JMC, de Castro M, Costa JN, Costa AM, da Silva ER, Neto OBR, Rocha C, Daffre S, Ferreira BR, da Silva JS, Szabó MP, Bechara GH. Gene Discovery inBoophilus microplus, the Cattle Tick: The Transcriptomes of Ovaries, Salivary Glands, and Hemocytes. Ann N Y Acad Sci 2004; 1026:242-6. [PMID: 15604500 DOI: 10.1196/annals.1307.037] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [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: 11/12/2022]
Abstract
The quest for new control strategies for ticks can profit from high throughput genomics. In order to identify genes that are involved in oogenesis and development, in defense, and in hematophagy, the transcriptomes of ovaries, hemocytes, and salivary glands from rapidly ingurgitating females, and of salivary glands from males of Boophilus microplus were PCR amplified, and the expressed sequence tags (EST) of random clones were mass sequenced. So far, more than 1,344 EST have been generated for these tissues, with approximately 30% novelty, depending on the the tissue studied. To date approximately 760 nucleotide sequences from B. microplus are deposited in the NCBI database. Mass sequencing of partial cDNAs of parasite genes can build up this scant database and rapidly generate a large quantity of useful information about potential targets for immunobiological or chemical control.
Collapse
Affiliation(s)
- Isabel K F de Miranda Santos
- Center for Genetic Resources and Biotechnology, Empresa Brasileira de Pesquisa Agropecuária, Brasília, DF, Brazil.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Garlet GP, Martins W, Fonseca BAL, Ferreira BR, Silva JS. Matrix metalloproteinases, their physiological inhibitors and osteoclast factors are differentially regulated by the cytokine profile in human periodontal disease. J Clin Periodontol 2004; 31:671-9. [PMID: 15257746 DOI: 10.1111/j.1600-051x.2004.00545.x] [Citation(s) in RCA: 162] [Impact Index Per Article: 8.1] [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: 11/29/2022]
Abstract
OBJECTIVE Inflammatory reactions raised in response to periodontopathogens are thought to trigger pathways of periodontal tissue destruction. We therefore investigated the expression of matrix metalloproteinases (MMPs) and the osteoclastogenic factor receptor activator of nuclear factor-kappaB ligand (RANKL), their respective tissue inhibitors of metalloproteinases (TIMPs) and osteoprotegerin (OPG) in different forms of human periodontal diseases (PDs), and the possible correlation with the expression of inflammatory and regulatory cytokines. MATERIAL AND METHODS Quantitative polymerase chain reaction (real-time PCR) was performed with gingival biopsies mRNA from aggressive (AP) and chronic periodontitis (CP) patients. RESULTS Periodontitis patients exhibit higher expression of all analyzed factors when compared with healthy tissues. The expression of MMPs and RANKL were similar in AP and CP, as well as the expression of TNF-alpha. On the other hand, the expression of TIMPs and OPG was higher in CP, and was associated with lower IFN-gamma and higher IL-10 expression, compared with AP. CONCLUSION It is possible that the pattern of cytokines expressed determines the stable or progressive nature of the lesions and regulates the severity of PD, driving the balance between MMPs and TIMPs, RANKL and OPG expression in the gingival tissues controlling the breakdown of soft and bone tissues and, consequently, the disease severity.
Collapse
Affiliation(s)
- Gustavo P Garlet
- Department of Biochemistry and Immunology, University of Ribeirao Preto-UNAERP, Dentistry School, Av.Bandeirantes 3900, 14049-900 Ribeirao Preto, SP, Brazil
| | | | | | | | | |
Collapse
|
29
|
Souto JT, Aliberti JC, Campanelli AP, Livonesi MC, Maffei CML, Ferreira BR, Travassos LR, Martinez R, Rossi MA, Silva JS. Chemokine production and leukocyte recruitment to the lungs of Paracoccidioides brasiliensis-infected mice is modulated by interferon-gamma. Am J Pathol 2003; 163:583-90. [PMID: 12875978 PMCID: PMC1868217 DOI: 10.1016/s0002-9440(10)63686-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Chemokines and chemokine receptors play a role in cell recruitment during granulomatous inflammatory reactions. Here, we evaluated the expression of chemokines and chemokine receptors and their regulation by IFN-gamma in the course of Paracoccidioides brasiliensis (Pb) infection in mice. We found an association between KC and MIP-1alpha (CCL3) production and neutrophil infiltration in the lungs of Pb-infected mice during the early acute phase of infection. High levels of RANTES/CCL5, MCP-1/CCL2, IP-10/CXCL10, and Mig/CXCL9 simultaneously with mononuclear cell infiltration in the lungs was found. In the absence of IFN-gamma (GKO mice) we observed increased production of KC and MIP-1alpha and chronic neutrophilia. Moreover, we found a change in the chemokine receptor profiles expressed by wild-type (WT) versus GKO animals. Increased expression of CXCR3 and CCR5, and low levels of CCR3 and CCR4 were observed in the lungs of Pb-infected WT mice, whereas the opposite effect was observed in the lungs of GKO mice. Consistent with these results, infected cells from WT mice preferentially migrated in response to IP-10 (CXCR3 ligand), while those from GKO mice migrated in response to eotaxin/CCL11 (CCR3 ligand). These results suggest that IFN-gamma modulates the expression of chemokines and chemokine receptors as well as the kind of cells that infiltrate the lungs of Pb-infected mice.
Collapse
Affiliation(s)
- Janeusa T Souto
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Ferreira BR, Szabó MJP, Cavassani KA, Bechara GH, Silva JS. Antigens from Rhipicephalus sanguineus ticks elicit potent cell-mediated immune responses in resistant but not in susceptible animals. Vet Parasitol 2003; 115:35-48. [PMID: 12860066 DOI: 10.1016/s0304-4017(03)00190-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [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: 11/15/2022]
Abstract
In the present study we compared the immunological reactions between Rhipicephalus sanguineus tick-infested susceptible (dogs and mice) and tick-resistant hosts (guinea pigs), elucidating some of the components of efficient protective responses against ticks. We found that T-cells from guinea pigs infested with adult ticks proliferate vigorously in the presence of concanavalin A (ConA), whereas ConA-induced cell proliferation of tick-infested mice and dogs was significantly decreased at 43.1 and 94.0%, respectively, compared to non-infested controls. Moreover, cells from mice and dogs submitted to one or three successive infestations did not exhibit a T-cell proliferative response to tick antigens, whilst cells from thrice tick-infested guinea pigs, when cultured with either a tick extract or tick saliva, displayed a significant increase in cell proliferation. Also, we evaluated the response of tick-infested mice to a cutaneous hypersensitivity test induced by a tick extract. Tick-infested mice developed a significant immediate reaction, whereby a 29.9% increase in the footpad thickness was observed. No delayed-type hypersensitivity (DTH) reaction was detected. Finally, the differential cell count at the tick attachment site in repeatedly infested mice exhibited a 6.6- and 4.1-fold increase in the percentage of eosinophils and neutrophils, respectively, compared to non-infested animals, while a decrease of 77.0-40.9 in the percentage of mononuclear cells was observed. The results of the cutaneous hypersensitivity test and the cellular counts at the tick feeding site for mice support the view that tick-infested mice develop an immune response to R. sanguineus ticks very similar to dogs, the natural host of this species of tick, but very different from guinea pigs (resistant host), which develop a DTH reaction in addition to a basophil and mononuclear cell infiltration at the tick-attachment site. In conclusion, saliva introduced during tick infestations reduces the ability of a susceptible animal host to respond to tick antigens that could stimulate a protective immune response. As a consequence, the animals present a lack of DTH response and disturbed cellular migration to tick feeding site, which can represent a deficient response against ticks.
Collapse
Affiliation(s)
- Beatriz R Ferreira
- Department of Biochemistry and Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, 14.049-900 Ribeirão Preto, SP, Brazil.
| | | | | | | | | |
Collapse
|
31
|
Garlet GP, Martins W, Ferreira BR, Milanezi CM, Silva JS. Patterns of chemokines and chemokine receptors expression in different forms of human periodontal disease. J Periodontal Res 2003; 38:210-7. [PMID: 12608917 DOI: 10.1034/j.1600-0765.2003.02012.x] [Citation(s) in RCA: 202] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Current knowledge states that periodontal diseases are chronic inflammatory reactions raised in response to periodontopathogens. Many cell types and mediators, including Th1 and Th2 lymphocytes, cytokines and chemokines, appear to be involved in the immunopathogenesis of periodontal diseases. Chemokines, a family of chemotactic cytokines, bind to specific receptors and selectively attract different cell subsets to the inflammatory site. They can also interact with classical cytokines and modulate the local immune response. In order to study the role of chemokines in periodontal diseases, we examined the expression of chemokines, chemokine receptors and cytokines by means of reverse transcription-polymerase chain reaction (RT-PCR) techniques. Characteristic patterns of such factors' expression were found in gingival biopsies from patients presenting with aggressive periodontitis and chronic periodontitis. The expression of the chemokines macrophage inflammatory protein-1 alpha (MIP-1alpha) and interferon-gamma inducible protein 10 (IP-10) and of their respective receptors, CCR5 and CXCR3, were more prevalent and higher in aggressive periodontitis, and associated with higher interferon-gamma (IFN-gamma) expression and lower interleukin-10 (IL-10) expression. In contrast, chronic periodontitis patients exhibited a more frequent and higher expression of monocyte chemoattractant protein-1 (MCP-1) and its receptor CCR4, and higher expression of IL-10. It is possible that chemokines, in addition to the classical cytokines, are involved in the immunopathogenesis of periodontal disease, driving the migration and the maintenance of several inflammatory cell types such as polymorphonuclear leukocytes, dendritic cells (DCs), natural killer cells, macrophages, and subsets of lymphocytes in the gingival tissues. These cells are thought to participate in the inflammatory and immune reaction that takes place in periodontal disease, killing pathogens, presenting antigens, and producing cytokines. The selective recruitment of polarized lymphocyte subsets could result in differential cytokine production at the site of response, which is supposed to determine the stable or progressive nature of the lesion. Besides, the role of chemokines as activators and chemoattracts of osteclasts may be involved in the determination of disease severity.
Collapse
MESH Headings
- Adult
- Chemokine CCL2/analysis
- Chemokine CCL2/genetics
- Chemokine CCL3
- Chemokine CCL4
- Chemokine CXCL10
- Chemokines/analysis
- Chemokines/genetics
- Chemokines, CC/immunology
- Chemokines, CXC/analysis
- Chemokines, CXC/genetics
- Chronic Disease
- Dendritic Cells/immunology
- Female
- Humans
- Interferon-gamma/analysis
- Interferon-gamma/genetics
- Interleukin-10/analysis
- Interleukin-10/genetics
- Killer Cells, Natural/immunology
- Lymphocyte Subsets/immunology
- Macrophage Inflammatory Proteins/analysis
- Macrophage Inflammatory Proteins/genetics
- Macrophages/immunology
- Male
- Middle Aged
- Neutrophils/immunology
- Periodontitis/immunology
- Receptors, CCR4
- Receptors, CCR5/analysis
- Receptors, CCR5/genetics
- Receptors, CXCR3
- Receptors, Chemokine/analysis
- Receptors, Chemokine/genetics
- T-Lymphocytes/immunology
Collapse
Affiliation(s)
- Gustavo P Garlet
- School of Medicine-USP, Department of Biochemistry and Immunology, Ribeirão Preto, SP, Brazil
| | | | | | | | | |
Collapse
|
32
|
Abstract
Several studies have revealed that T lymphocytes and cytokines play a crucial role in determining the outcome of parasitic infections in terms of protective immunity. In this study we found that Rhipicephalus sanguineus tick saliva stimulates transforming growth factor-beta (TGF-beta), and reduces interleukin-12 (IL-12) secretion by cells from normal C3H/HeJ mice. Moreover, murine lymph node cells harvested 6 days after the fourth infestation with ticks presented an 82.4% decrease in their proliferative response to concanavalin A (Con A) compared with the response of control cells. In addition, lymph node cells cultured in the presence of Con A showed a T-helper 2-type (Th2-type) cytokine profile, represented by augmented IL-4 and IL-10 and TGF-beta. On the other hand, the IL-2, interferon-gamma (IFN-gamma) and IL-12 synthesis was significantly inhibited. These results indicate that ticks may modulate the host's immune response through saliva injection. Considering that C3H/HeJ mice develop no protective immunity to R. sanguineus infestation, our results suggest that tick-induced Th2-type cytokines and a decreased proliferative response probably lead the host to a susceptible state to both tick and tick-transmitted pathogens.
Collapse
Affiliation(s)
- B R Ferreira
- Department of Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | |
Collapse
|
33
|
Ferreira BR, Silva JS. Saliva of Rhipicephalus sanguineus tick impairs T cell proliferation and IFN-gamma-induced macrophage microbicidal activity. Vet Immunol Immunopathol 1998; 64:279-93. [PMID: 9730222 DOI: 10.1016/s0165-2427(98)00135-4] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.0] [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: 02/08/2023]
Abstract
In this study, we investigated tick saliva effects on T cell proliferation, antigen presentation and IFN-gamma-induced macrophage activation, events which are associated with host immune defense mechanisms. Mice repeatedly infested with Rhipicephalus sanguineus ticks, similarly to dogs, did not develop resistance to further infestations. We determined that R. sanguineus tick saliva inhibited, in a dose-dependent manner, both Con-A and specific antigen-induced splenic T cell proliferation. Tick saliva diluted twenty times (64 microg/ml) inhibited Con-A-induced and antigen-specific T cell proliferation in 83% and 69%, respectively. In addition, the inhibition of cell proliferation correlated with a decrease in IL-2 production. Microconcentrator fractionated saliva was tested on a Con-A-induced cell proliferation assay, and showed that one fraction between 3 and 10 kDa and another smaller than 3 kDa can be responsible for the inhibition of T cell proliferation. Although saliva inhibited cell proliferation, it did not impair antigen presentation. Tick saliva further abrogated the killing of intracellular forms of Trypanosoma cruzi by IFN-gamma-activated macrophages. Moreover, saliva-induced macrophage inhibition of IFN-gamma-induced-trypanocidal activity was paralleled with 69% less nitric oxide (NO) production. Finally, tick saliva doubled the production of IL-10 and reduced 84.6% production of IFN-gamma by splenocytes cultured with T. cruzi, suggesting that decreased macrophage NO production may be due to a saliva-induced cytokine imbalance, leading to decreased NO synthase activity. Together, these data indicate that tick saliva can modulate host immune response, thus, contributing to its feeding success and favoring the transmission of tick-borne pathogens.
Collapse
Affiliation(s)
- B R Ferreira
- Department of Immunology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil
| | | |
Collapse
|
34
|
Ferreira BR, Machado RZ, Bechara GH. Western blot analysis of tick antigens from a Rhipicephalus sanguineus unfed larval extract and identification of antigenic sites in tick sections using immunohistochemistry. A comparative study between resistant and susceptible host species. Vet Parasitol 1996; 62:161-74. [PMID: 8638389 DOI: 10.1016/0304-4017(95)00838-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Most parasite-host relationships are characterized by the development of resistance by the host, thus limiting the number of parasites. However, some cases are very unusual. In the relationship of the domestic dog with the brown dog-tick Rhipicephalus sanguineus this does not occur, whereas guinea pigs develop efficient resistance. Sera from domestic dogs, crab-eating foxes and guinea pigs collected before and after infestation with R. sanguineus ticks, and after immunization with a whole tick adult or larval homogenate, were used in Western blot analysis to compare and identify potential important antigens from a tick larval homogenate. The same sera were tested in an indirect immunohistochemistry assay in an attempt to compare relevant antigenic sites on histological tick sections. The immunoblotting displayed antigens recognized only by the guinea pigs, as well as several shared antigens between host species, depending on the king of immunization. Immunohistochemistry revealed probable antigenic sites on the cells and tissues of ticks, which varied depending on the kind of immunization (infestation or vaccination) and the animal species involved.
Collapse
Affiliation(s)
- B R Ferreira
- Departmento de Patologia Veterinária, Faculdade de Ciências Agráriase Veterianárias. Universidade Estadual Paulista, Jaboticabal-SP, Brazil
| | | | | |
Collapse
|
35
|
Affiliation(s)
- B R Ferreira
- Department of Animal Pathology, University of the São Paulo
| | | | | | | |
Collapse
|