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Cincura C, Costa RS, De Lima CMF, Oliveira-Filho J, Rocha PN, Carvalho EM, Lessa MM. Assessment of Immune and Clinical Response in Patients with Mucosal Leishmaniasis Treated with Pentavalent Antimony and Pentoxifylline. Trop Med Infect Dis 2022; 7:383. [PMID: 36422934 PMCID: PMC9696819 DOI: 10.3390/tropicalmed7110383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/28/2022] [Accepted: 10/29/2022] [Indexed: 05/11/2024] Open
Abstract
Mucosal leishmaniasis (ML) is a severe form of tegumentary leishmaniasis associated with a persistent inflammatory response. High levels of TNF, IFN-γ, CXCL9 and CXCL10 are found in ML patients, and the association of pentoxifylline with antimony is more effective in decreasing the healing time in ML patients when compared to antimony alone. The present study aimed to investigate the existence of a correlation between cytokine and chemokine production and ML severity and evaluate the potential value of cytokine and chemokine production as marker of therapeutic response in ML patients. This prospective study included 86 subjects in an area of endemic Leishmania braziliensis transmission. Patients diagnosed with ML were classified into clinical stages ranging from I to V according to disease severity. TNF, IFN-γ, CXCL9 and CXCL10 levels were quantified in the supernatant of the mononuclear cell cultures by ELISA before and after treatment with antimony alone or antimony plus pentoxifylline. The median TNF level in the group with mild disease (Stages I-II) was 1064 pg/mL (142-3738 pg/mL), while, in the group with moderate or severe disease (Stages III-V), it was 1941 pg/mL (529-5294 pg/mL) (p = 0.008). A direct correlation was observed between ML clinical severity and levels of TNF production (r = 0.44, p = 0.007). Patients who were treated with antimony and pentoxifylline healed significantly faster than those treated with antimony alone (52 vs. 77 days, hazard ratio = 0.60; 95% confidence interval = 0.38-0.95, p = 0.013). Therapeutic failure was higher in the group that received antimony alone (25% vs. 7%; p = 0.041). There was a significant decrease in CXCL9 after therapy of ML in both groups (p = 0.013; p = 0.043). TNF levels are associated with the severity of mucosal diseases, and pentoxifylline associated with antimony should be the recommended therapy for ML in countries where liposomal amphotericin B is not available.
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Affiliation(s)
- Carolina Cincura
- Serviço de Imunologia, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Serviço de Otorrinolaringologia, Unidade Cérvico-Facial, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
| | - Rubia S. Costa
- Serviço de Imunologia, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Instituto Gonçalo Moniz–IGM–Fiocruz–Bahia, Salvador 40296-710, Bahia, Brazil
| | - Clara Monica F. De Lima
- Serviço de Imunologia, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Serviço de Otorrinolaringologia, Unidade Cérvico-Facial, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
| | - Jamary Oliveira-Filho
- Instituto Nacional de Ciência e Tecnologia de Doenças Tropicais–INCT–DT (CNPq/MCT), Salvador 40110-160, Bahia, Brazil
| | - Paulo Novis Rocha
- Departamento de Medicina Interna e Apoio Diagnóstico, Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador 40026-010, Bahia, Brazil
| | - Edgar M. Carvalho
- Serviço de Imunologia, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Instituto Gonçalo Moniz–IGM–Fiocruz–Bahia, Salvador 40296-710, Bahia, Brazil
- Instituto Nacional de Ciência e Tecnologia de Doenças Tropicais–INCT–DT (CNPq/MCT), Salvador 40110-160, Bahia, Brazil
| | - Marcus M. Lessa
- Serviço de Imunologia, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Serviço de Otorrinolaringologia, Unidade Cérvico-Facial, Complexo Hospitalar Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-160, Bahia, Brazil
- Departamento de Cirurgia Experimental e Especialidades Cirúrgicas, Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador 40026-010, Bahia, Brazil
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Cavalcante MKDA, de Freitas e Silva R, Pereira VRA, Brelaz-de-Castro MCA. Opinion Article: NK Cells in Cutaneous Leishmaniasis: Protection or Damage? Front Immunol 2022; 13:933490. [PMID: 35844579 PMCID: PMC9283678 DOI: 10.3389/fimmu.2022.933490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 06/01/2022] [Indexed: 11/18/2022] Open
Affiliation(s)
- Marton Kaique de Andrade Cavalcante
- Department of Immunology, Aggeu Magalhães Institute - Oswaldo Cruz Foundation, Recife, Brazil
- Parasitology Laboratory, Federal University of Pernambuco, Vitoria de Santo Antão, Brazil
| | - Rafael de Freitas e Silva
- Department of Immunology, Aggeu Magalhães Institute - Oswaldo Cruz Foundation, Recife, Brazil
- Department of Natural Sciences, University of Pernambuco, Garanhuns, Brazil
| | | | - Maria Carolina Accioly Brelaz-de-Castro
- Department of Immunology, Aggeu Magalhães Institute - Oswaldo Cruz Foundation, Recife, Brazil
- Parasitology Laboratory, Federal University of Pernambuco, Vitoria de Santo Antão, Brazil
- *Correspondence: Maria Carolina Accioly Brelaz-de-Castro,
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de Lima CMF, Magalhães AS, Costa R, Barreto CC, Machado PRL, Carvalho EM, Lessa MM, Carvalho LP. High Anti- Leishmania IgG Antibody Levels Are Associated With Severity of Mucosal Leishmaniasis. Front Cell Infect Microbiol 2021; 11:652956. [PMID: 33898330 PMCID: PMC8063102 DOI: 10.3389/fcimb.2021.652956] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/16/2021] [Indexed: 11/13/2022] Open
Abstract
Background Mucosal leishmaniasis (ML), the most inflammatory form of tegumentary leishmaniasis, is predominantly caused by Leishmania braziliensis. The disease is characterized by the development of lesions, mainly in the nasal mucosa. An exacerbated inflammatory response has been associated with the presence of destructive and disfiguring lesions, with stages of severity ranging from small nodulations to the complete destruction of the nasal pyramid architecture. As Leishmania is an intracellular parasite, most immunological studies have emphasized the cell-mediated immune response, while relatively few studies aimed to investigate the role antibodies in protection against, or the pathology of ML. Methods Patients with a confirmed diagnosis of ML were classified according to clinical staging criteria. Serum levels of Leishmania-specific IgG, IgG1 and IgG2 antibodies were determined by ELISA before and after treatment with antimony or antimony plus pentoxifylline. Results Patients in stages IV and V produced higher concentrations of IgG and IgG1 antibodies when compared to those in stage I and II. Significant reductions were seen in the concentrations of IgG and IgG2 antibodies in most patients who responded well to treatment. Conclusions Our data demonstrate an association between IgG antibody titers and the severity of mucosal disease. The observed reduction in antibody production after successful treatment in most patients preliminarily indicates that these tests can be used to aid in the assessment of therapeutic response.
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Affiliation(s)
- Clara Mônica F de Lima
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,School of Medicine, Programa de Pós-graduação em Ciências da Saúde - Universidade Federal da Bahia, Salvador, Brazil
| | - Andrea S Magalhães
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Rúbia Costa
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Carolina C Barreto
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
| | - Paulo R L Machado
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,School of Medicine, Programa de Pós-graduação em Ciências da Saúde - Universidade Federal da Bahia, Salvador, Brazil.,Ministry of Sciences and Technology, Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, INCT-DT, Salvador, Brazil
| | - Edgar M Carvalho
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,School of Medicine, Programa de Pós-graduação em Ciências da Saúde - Universidade Federal da Bahia, Salvador, Brazil.,Ministry of Sciences and Technology, Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, INCT-DT, Salvador, Brazil.,Laboratório de Pesquisas Clínicas (LAPEC), Instituto Gonçalo Moniz (IGM), Fiocruz, Salvador, Brazil
| | - Marcus M Lessa
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,School of Medicine, Programa de Pós-graduação em Ciências da Saúde - Universidade Federal da Bahia, Salvador, Brazil
| | - Lucas P Carvalho
- Serviço de Imunologia, Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil.,School of Medicine, Programa de Pós-graduação em Ciências da Saúde - Universidade Federal da Bahia, Salvador, Brazil.,Ministry of Sciences and Technology, Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais, INCT-DT, Salvador, Brazil.,Laboratório de Pesquisas Clínicas (LAPEC), Instituto Gonçalo Moniz (IGM), Fiocruz, Salvador, Brazil
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Review on the Role of Host Immune Response in Protection and Immunopathogenesis during Cutaneous Leishmaniasis Infection. J Immunol Res 2020; 2020:2496713. [PMID: 32656269 PMCID: PMC7320295 DOI: 10.1155/2020/2496713] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 05/02/2020] [Accepted: 05/21/2020] [Indexed: 12/13/2022] Open
Abstract
Cutaneous leishmaniasis (CL) is a major public health problem worldwide and spreads to human via the bite of sand flies during blood meal. Following its inoculation, the promastigotes are immediately taken up by phagocytic cells and these leishmania-infected host cells produce proinflammatory cytokines that activate other immune cells and these infected host cells produce more cytokines and reactive nitrogen and oxygen species for efficient control of leishmania infection. Many experimental studies showed that resistance to infection with leishmania paraites is associated with the production of proinflammatory cytokines and activation of CD4+ Th1 response. On the other hand, vulnerability to this parasitic infection is correlated to production of T helper 2 cytokines that facilitate persistence of parasites and disease progression. In addition, some studies have also indicated that CD8+ T cells play a vital role in immune defense through cytokine production and their cytotoxic activity and excessive production of proinflammatory mediators promote amplified recruitment of cells. This could be correlated with excessive inflammatory reaction and ultimately resulted in tissue destruction and development of immunopathogenesis. Thus, there are contradictions regarding the role of immune responses in protection and immunopathogenesis of CL disease. Therefore, the aim of this paper was to review the role of host immune response in protection and its contribution to disease severity for CL infection. In order to obtain more meaningful data regarding the nature of immune response to leishmania, further in-depth studies focused on immune modulation should be conducted to develop better therapeutic strategies.
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Abstract
Post-kala-azar dermal leishmaniasis (PKDL) is clinical outcome of visceral leishmaniasis (VL) and is thought to be the potential reservoir of parasite. Miltefosine (MF) is the only oral drug existing for treatment of post-kala-azar dermal leishmaniasis (PKDL). Increased miltefosine tolerance in clinical isolates of Leishmania donovani has been reported and is one of the major concerns in the treatment of PKDL. Here, we report a highly ulcerated PKDL case that was successfully cured after miltefosine treatment. Post-kala-azar dermal leishmaniasis (PKDL) is a dermatological complication which usually occurs among treated VL cases. Despite active surveillance, some exclusive cases have been reported in the areas where VL is endemic. To eliminate VL, all source of reservoir to be managed properly. The appropriate diagnosis and treatment of PKDL cases are key. Here we report the identification and treatment of a highly ulcerated PKDL case. A detailed investigation inferred the possible role of CD8 + T cell in the skin ulcer. This report also describes how to identify the suspected case, to confirm the diagnosis, and to provide a successful treatment option.
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Boussoffara T, Boubaker MS, Ben Ahmed M, Mokni M, Feriani S, Ben Salah A, Louzir H. Activated cytotoxic T cells within zoonotic cutaneous leishmaniasis lesions. IMMUNITY INFLAMMATION AND DISEASE 2019; 7:95-104. [PMID: 30997749 PMCID: PMC6688079 DOI: 10.1002/iid3.240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 11/23/2018] [Indexed: 01/10/2023]
Abstract
Introduction Zoonotic cutaneous leishmaniasis (ZCL), due to infection by Leishmania (L). major, is characterized by polymorphic clinical manifestations which could be attributed to the host's immune response. In this study we investigated the involvement of cytotoxic cells on the outcome of the disease. Methods Expression of granzyme B (GrB), granulysine (Grly), and interferon (IFN)‐γ was evaluated within ZCL lesion specimens using the technique of real‐time quantitative polymerase chain reaction (RT‐qPCR). Immunohistochemical staining was performed using anti‐CD3, CD4, CD8, CD56, GrB, and IFN‐γ antibodies to identify the phenotype of GrB and IFN‐γ‐producing cells. Results GrB and Grly mRNA was detected within 75% and 80% of ZCL lesions, respectively. Statistical analysis demonstrated a significant correlation between levels of GrB and Grly. Interestingly, expression of these molecules correlates negatively with the lesion's age. The highest levels were measured in early lesions (E‐ZCL) (lesion age ≤1 month) comparing to late lesions (L‐ZCL) (lesion age >1 month). Otherwise, IFN‐γ mRNA was detected only within 56% and a positive correlation was found between levels of this cytokine and those of GrB. Immunohistochemical analysis showed that GrB is produced essentially by CD8+T cells whereas IFN‐γ is produced by both CD4+ and CD8+T cells. Conclusion Together our results demonstrate the presence of cytotoxic cells producing GrB and Grly within leishmaniasis cutaneous lesions.
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Affiliation(s)
- Thouraya Boussoffara
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia.,Université de Tunis El Manar, Tunis, Tunisia
| | - Mohamed Samir Boubaker
- Université de Tunis El Manar, Tunis, Tunisia.,Laboratory of Human and Experimental Pathology, Pasteur Institute of Tunis, Tunis, Tunisia.,Faculté de Médecine de Tunis, Tunis, Tunisia
| | - Melika Ben Ahmed
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia.,Université de Tunis El Manar, Tunis, Tunisia
| | - Mourad Mokni
- Faculté de Médecine de Tunis, Tunis, Tunisia.,Department of Dermatology, Hospital La Rabta, Tunis, Tunisia
| | - Salma Feriani
- Laboratory of Human and Experimental Pathology, Pasteur Institute of Tunis, Tunis, Tunisia
| | - Afif Ben Salah
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia.,Université de Tunis El Manar, Tunis, Tunisia.,Department of Family and Community Medicine, College of Medecine and Medical Sciences, Arabian Gulf University (AGU), Manama, Bahrain
| | - Hechmi Louzir
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia.,Université de Tunis El Manar, Tunis, Tunisia
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Campos TM, Costa R, Passos S, Carvalho LP. Cytotoxic activity in cutaneous leishmaniasis. Mem Inst Oswaldo Cruz 2017; 112:733-740. [PMID: 29091132 PMCID: PMC5661895 DOI: 10.1590/0074-02760170109] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/10/2017] [Indexed: 01/27/2023] Open
Abstract
Cutaneous leishmaniasis (CL) is a chronic disease caused by species of the protozoan Leishmania and characterised by the presence of ulcerated skin lesions. Both parasite and host factors affect the clinical presentation of the disease. The development of skin ulcers in CL is associated with an inflammatory response mediated by cells that control parasite growth but also contribute to pathogenesis. CD8+ T cells contribute to deleterious inflammatory responses in patients with CL through cytotoxic mechanisms. In addition, natural killer cells also limit Leishmania infections by production of interferon-γ and cytotoxicity. In this review, we focus on studies of cytotoxicity in CL and its contribution to the pathogenesis of this disease.
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Affiliation(s)
- Taís M Campos
- Universidade Federal da Bahia, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | - Rúbia Costa
- Universidade Federal da Bahia, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil
| | - Sara Passos
- Universidade Federal da Bahia, Serviço de Imunologia, Salvador, BA, Brasil.,Houston Methodist Research Institute, Department of Nanomedicine, Houston, TX, United States
| | - Lucas P Carvalho
- Universidade Federal da Bahia, Serviço de Imunologia, Salvador, BA, Brasil.,Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-Graduação em Ciências da Saúde, Salvador, BA, Brasil.,Instituto Nacional de Ciências e Tecnologia-Doenças Tropicais, Salvador, BA, Brasil.,Fundação Oswaldo Cruz-Fiocruz, Instituto Gonçalo Moniz, Laboratório Avançado de Saúde Pública, Salvador, BA, Brasil
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Ferraz R, Cunha CF, Pimentel MIF, Lyra MR, Pereira-Da-Silva T, Schubach AO, Da-Cruz AM, Bertho AL. CD3 +CD4 negCD8 neg (double negative) T lymphocytes and NKT cells as the main cytotoxic-related-CD107a + cells in lesions of cutaneous leishmaniasis caused by Leishmania (Viannia) braziliensis. Parasit Vectors 2017; 10:219. [PMID: 28468680 PMCID: PMC5415843 DOI: 10.1186/s13071-017-2152-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 04/21/2017] [Indexed: 02/03/2023] Open
Abstract
Background Cutaneous leishmaniasis (CL) is caused by Leishmania (Viannia) braziliensis, which infects dermal macrophages and dendritic cells, causing an intense immune-mediated-tissue inflammation and a skin ulcer with elevated borders that can heal spontaneously or after antimonial therapy. The resolution of lesions depends on an adaptive immune response, and cytotoxic cells seem to have a fundamental role in this process. The aim of this study is to better understand the role of cytotoxicity mediated mechanisms that occur during the immune response in the CL lesion milieu, considering distinct cytotoxic-related CD107a+ cells, such as CD8+, CD4+, CD4neg CD8neg (double-negative, DN) and CD4+CD8+ (double-positive, DP) T lymphocytes, as well as NK and NKT cells. Methods Lesion derived cells were assessed for T cell subpopulations and NK cells, as well as CD107a expression by flow cytometry. In addition, cytometric bead array (CBA) was used to quantify cytokines and granzyme B concentrations in supernatants from macerated lesions. Results Flow cytometry analyses revealed that NKT cells are the major CD107a-expressing cell population committed to cytotoxicity in CL lesion, although we also observed high frequencies of CD4+ and DN T cells expressing CD107a. Analysing the pool of CD107a+-cell populations, we found a higher distribution of DN T cells (44%), followed by approximately 25% of NKT cells. Interestingly, NK and CD8+ T cells represented only 3 and 4% of the total-CD107a+-cell pool, respectively. Conclusions The cytotoxicity activity that occurs in the lesion milieu of CL patients seems to be dominated by DN T and NKT cells. These findings suggest the need for a reevaluation of the role of classical-cytotoxic NK and CD8+ T cells in the pathogenesis of CL, implicating an important role for other T cell subpopulations.
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Affiliation(s)
- Raquel Ferraz
- Laboratory of Immunoparasitology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil.,Flow Cytometry Sorting Core Facility, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Clarissa F Cunha
- Laboratory of Immunoparasitology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Maria Inês F Pimentel
- Laboratory of Surveillance for Leishmaniasis, Evandro Chagas National Institute of Infectology, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Marcelo R Lyra
- Laboratory of Surveillance for Leishmaniasis, Evandro Chagas National Institute of Infectology, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Tatiana Pereira-Da-Silva
- Laboratory of AIDS and Molecular Immunology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Armando O Schubach
- Laboratory of Surveillance for Leishmaniasis, Evandro Chagas National Institute of Infectology, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Alda Maria Da-Cruz
- Laboratory of Interdisciplinary Medical Research, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Alvaro Luiz Bertho
- Laboratory of Immunoparasitology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil. .,Flow Cytometry Sorting Core Facility, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ, Brazil.
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Wound healing in cutaneous leishmaniasis: A double edged sword of IL-10 and TGF-β. Comp Immunol Microbiol Infect Dis 2017; 51:15-26. [PMID: 28504090 DOI: 10.1016/j.cimid.2017.02.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 01/05/2023]
Abstract
Immune responses have a crucial role during the wound healing process in cutaneous leishmaniasis (CL). However, there are several paradoxes in immunity against CL. On the one hand, regulatory cytokines interleukin (IL)-10 and transforming growth factor beta (TGF-β) increase susceptibility to CL through suppression of several proinflammatory cytokines that require for defense against CL. On the other hand, these cytokines play a pivotal role in the acceleration of wound healing process. This review discusses about the dual role of IL-10 and TGF-β during the wound healing process and immunity against CL to offer a new insight about wound healing in CL.
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Duarte MC, Lage LMDR, Lage DP, Martins VT, Carvalho AMRS, Roatt BM, Menezes-Souza D, Tavares CAP, Alves RJ, Barichello JM, Coelho EAF. Treatment of murine visceral leishmaniasis using an 8-hydroxyquinoline-containing polymeric micelle system. Parasitol Int 2016; 65:728-736. [PMID: 27425599 DOI: 10.1016/j.parint.2016.07.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/08/2016] [Accepted: 07/13/2016] [Indexed: 01/09/2023]
Abstract
New therapeutics are urgently needed to treat visceral leishmaniasis (VL). Due to the fact that drug discovery is a long and expensive process, the development of delivery systems to carry old and toxic drugs could be considered, as well as the evaluation of new molecules that have already shown to present biological activity. In this context, the present study evaluated the in vitro and in vivo antileishmanial activity of an 8-hydroxyquinoline (8-HQN)-containing polymeric micelle (8-HQN/M) system against Leishmania infantum, the main causative agent of VL in the Americas. The experimental strategy used was based on the evaluation of the parasite load by a limiting-dilution technique in the spleen, liver, bone marrow and draining lymph nodes of the infected and treated animals, as well as by a quantitative PCR (qPCR) technique to also assess the splenic parasite load. The immune response developed was evaluated by the production of IFN-γ, IL-4, IL-10, IL-12 and GM-CSF cytokines, as well as by antileishmanial nitrite dosage and antibodies production. Hepatic and renal enzymes were also investigated to verify cellular injury as a result of treatments toxicity. In the results, 8-HQN/M-treated mice, when compared to the other groups: saline, free amphotericin B (AmpB, as a drug control), 8-HQN and B-8-HQN/M (as a micelle control) showed more significant reductions in their parasite burden in all evaluated organs. These animals also showed an antileishmanial Th1 immunity, which was represented by high levels of IFN-γ, IL-12, GM-CSF and nitrite, associated with a low production of IL-4 and IL-10 and anti-Leishmania IgG1 isotype antibodies. In addition, any hepatic or renal damage was found in these treated animals. In conclusion, 8-HQN/M was effective in treating L. infantum-infected BALB/c mice, and can be considered alone, or combined with other drugs, as an alternative treatment for VL.
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Affiliation(s)
- Mariana Costa Duarte
- Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil; Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Letícia Martins Dos Reis Lage
- Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Daniela Pagliara Lage
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Vívian Tamietti Martins
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | | | - Bruno Mendes Roatt
- Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Daniel Menezes-Souza
- Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil; Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Carlos Alberto Pereira Tavares
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Ricardo José Alves
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - José Mário Barichello
- Departamento de Farmácia, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, Minas Gerais, Brazil; Laboratório de Tecnologia Farmacêutica, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas. Campus Capão do Leão, S/N, 96900-010 Pelotas, RS, Brazil
| | - Eduardo Antonio Ferraz Coelho
- Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil; Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil.
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Chávez-Fumagalli MA, Ribeiro TG, Castilho RO, Fernandes SOA, Cardoso VN, Coelho CSP, Mendonça DVC, Soto M, Tavares CAP, Faraco AAG, Coelho EAF. New delivery systems for amphotericin B applied to the improvement of leishmaniasis treatment. Rev Soc Bras Med Trop 2016; 48:235-42. [PMID: 26107999 DOI: 10.1590/0037-8682-0138-2015] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 05/29/2015] [Indexed: 11/21/2022] Open
Abstract
Leishmaniasis is one of the six major tropical diseases targeted by the World Health Organization. It is a life-threatening disease of medical, social and economic importance in endemic areas. No vaccine is yet available for human use, and chemotherapy presents several problems. Pentavalent antimonials have been the drugs of choice to treat the disease for more than six decades; however, they exhibit high toxicity and are not indicated for children, for pregnant or breastfeeding women or for chronically ill patients. Amphotericin B (AmpB) is a second-line drug, and although it has been increasingly used to treat visceral leishmaniasis (VL), its clinical use has been hampered due to its high toxicity. This review focuses on the development and in vivo usage of new delivery systems for AmpB that aim to decrease its toxicity without altering its therapeutic efficacy. These new formulations, when adjusted with regard to their production costs, may be considered new drug delivery systems that promise to improve the treatment of leishmaniasis, by reducing the side effects and the number of doses while permitting a satisfactory cost-benefit ratio.
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Affiliation(s)
- Miguel Angel Chávez-Fumagalli
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiana Gomes Ribeiro
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rachel Oliveira Castilho
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Simone Odília Antunes Fernandes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Valbert Nascimento Cardoso
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Manuel Soto
- Consejo Superior de Investigaciones Científicas-Universidad Autonoma de Madrid;Centro de Biología Molecular Severo Ochoa, Universidad Autónoma de Madrid, Spain
| | - Carlos Alberto Pereira Tavares
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - André Augusto Gomes Faraco
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Eduardo Antonio Ferraz Coelho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Naouar I, Boussoffara T, Chenik M, Gritli S, Ben Ahmed M, Belhadj Hmida N, Bahi-Jaber N, Bardi R, Gorgi Y, Ben Salah A, Louzir H. Prediction of T Cell Epitopes from Leishmania major Potentially Excreted/Secreted Proteins Inducing Granzyme B Production. PLoS One 2016; 11:e0147076. [PMID: 26771180 PMCID: PMC4714855 DOI: 10.1371/journal.pone.0147076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 12/27/2015] [Indexed: 01/05/2023] Open
Abstract
Leishmania-specific cytotoxic T cell response is part of the acquired immune response developed against the parasite and contributes to resistance to reinfection. Herein, we have used an immune-informatic approach for the identification, among Leishmania major potentially excreted/secreted proteins previously described, those generating peptides that could be targeted by the cytotoxic immune response. Seventy-eight nonameric peptides that are predicted to be loaded by HLA-A*0201 molecule were generated and their binding capacity to HLA-A2 was evaluated. These peptides were grouped into 20 pools and their immunogenicity was evaluated by in vitro stimulation of peripheral blood mononuclear cells from HLA-A2+-immune individuals with a history of zoonotic cutaneous leishmaniasis. Six peptides were identified according to their ability to elicit production of granzyme B. Furthermore, among these peptides 3 showed highest affinity to HLA-A*0201, one derived from an elongation factor 1-alpha and two from an unknown protein. These proteins could constitute potential vaccine candidates against leishmaniasis.
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Affiliation(s)
- Ikbel Naouar
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
| | - Thouraya Boussoffara
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
- * E-mail:
| | - Mehdi Chenik
- University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Medical Parasitology, Biotechnology and Biomolecules, LR11-IPT-06, Pasteur Institute of Tunis, Tunis, Tunisia
| | - Sami Gritli
- Department of Pathology, Charles Nicolle Hospital and Faculty of Medicine of Tunis, Tunis, Tunisia
| | - Melika Ben Ahmed
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
| | - Nabil Belhadj Hmida
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
| | - Narges Bahi-Jaber
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- UPSP EGEAL Institut Polytechnique LaSalle Beauvais, Beauvais, France
| | - Rafika Bardi
- Laboratory of Immunology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Yousr Gorgi
- Laboratory of Immunology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Afif Ben Salah
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
| | - Hechmi Louzir
- Laboratory of Transmission, Control, and Immunobiology of Infections-LR11IPT02, Pasteur Institute of Tunis, Tunis, Tunisia
- University of Tunis El Manar, Tunis, Tunisia
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Ferraz R, Cunha CF, Pimentel MI, Lyra MR, Schubach AO, Mendonça SCFD, Da-Cruz AM, Bertho AL. T-cell receptor Vβ repertoire of CD8+ T-lymphocyte subpopulations in cutaneous leishmaniasis patients from the state of Rio de Janeiro, Brazil. Mem Inst Oswaldo Cruz 2015; 110:596-605. [PMID: 26107186 PMCID: PMC4569821 DOI: 10.1590/0074-02760150039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 05/21/2015] [Indexed: 01/30/2023] Open
Abstract
In human cutaneous leishmaniasis (CL), the immune response is mainly mediated by
T-cells. The role of CD8+ T-lymphocytes, which are related to healing or
deleterious functions, in affecting clinical outcome is controversial. The aim of
this study was to evaluate T-cell receptor diversity in late-differentiated effector
(LDE) and memory CD8+ T-cell subsets in order to create a profile of
specific clones engaged in deleterious or protective CL immune responses. Healthy
subjects, patients with active disease (PAD) and clinically cured patients were
enrolled in the study. Total CD8+ T-lymphocytes showed a disturbance in
the expression of the Vβ2, Vβ9, Vβ13.2, Vβ18 and Vβ23 families. The analyses of
CD8+T-lymphocyte subsets showed high frequencies of LDE
CD8+T-lymphocytes expressing Vβ12 and Vβ22 in PAD, as well as
effector-memory CD8+ T-cells expressing Vβ22. We also observed low
frequencies of effector and central-memory CD8+ T-cells expressing Vβ2 in
PAD, which correlated with a greater lesion size. Particular Vβ expansions point to
CD8+ T-cell clones that are selected during CL immune responses,
suggesting that CD8+ T-lymphocytes expressing Vβ12 or Vβ22 are involved in
a LDE response and that Vβ2 contractions in memory CD8+T-cells are
associated with larger lesions.
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Affiliation(s)
- Raquel Ferraz
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Clarissa Ferreira Cunha
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Maria Inês Pimentel
- Laboratório de Vigilância em Leishmaniose, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Marcelo Rosandiski Lyra
- Laboratório de Vigilância em Leishmaniose, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Armando Oliveira Schubach
- Laboratório de Vigilância em Leishmaniose, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | | | - Alda Maria Da-Cruz
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
| | - Alvaro Luiz Bertho
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, BR
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Ferraz R, Cunha CF, Gomes-Silva A, Schubach AO, Pimentel MIF, Lyra MR, Mendonça SC, Valete-Rosalino CM, Da-Cruz AM, Bertho ÁL. Apoptosis and frequency of total and effector CD8+ T lymphocytes from cutaneous leishmaniasis patients during antimonial therapy. BMC Infect Dis 2015; 15:74. [PMID: 25870976 PMCID: PMC4338827 DOI: 10.1186/s12879-015-0799-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 02/04/2015] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Leishmaniasis is an important parasitic disease affecting millions worldwide. Human cutaneous leishmaniasis (CL) is endemic in Rio de Janeiro, Brazil, where is caused by Leishmania braziliensis. The adaptive immune response is accountable for the healing of CL and despite of key role of CD8+ T cells in this immune response little is known about the CD8+ T lymphocytes frequencies, apoptosis and antigen-responsive CD8+ T lymphocytes of CL patients during antimonial therapy. METHODS Using flow cytometry, we examined total and effector CD8+ T cells from CL patients before (PBT), during (PDT) and after (PAT) treatment for apoptosis and frequencies upon isolation and after in vitro L. braziliensis antigens (LbAg)-stimulation culture. Besides, a correlation study between immunological findings and lesion size was done. RESULTS PDT showed lower frequencies of total CD8+ T lymphocytes and higher levels of apoptosis of these cells, which were also observed following LbAg-stimulation culture. Regarding effector CD8+ T cells, high frequencies were observed in PDT, while lower frequencies were observed in PAT. Interestingly, PDT showed higher frequencies of apoptotic-effector CD8+ T lymphocytes. Similar results were seen after in vitro antigenic-stimulation assays. Correlation analysis showed that the greater the size of lesion, the smaller the frequency of effector CD8+ T lymphocytes in PDT and PAT, as well as a positive correlation between apoptotic-effector CD8+ T cells frequency and lesion size of PDT. CONCLUSIONS Changes in effector CD8+ T-lymphocyte frequencies, during and after treatment, seem to represent a critical stage to generate an efficient immune response and suggest that these cells would be evolved in the triggering or in the resolution of lesion, under the influence of therapy. This hypothesis opens new perspectives to clarify controversial statements about the protective or deleterious role of CD8+ T cells in the cure or aggravation of CL and the new approach of evaluating patients during treatment proved to be of utmost importance for understanding the immune response in the healing process of human CL.
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15
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Protective and pathological functions of CD8+ T cells in Leishmania braziliensis infection. Infect Immun 2014; 83:898-906. [PMID: 25534940 DOI: 10.1128/iai.02404-14] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cutaneous leishmaniasis (CL) caused by Leishmania braziliensis is characterized by a strong Th1 response that leads to skin lesion development. In areas where L. braziliensis transmission is endemic, up to 15% of healthy subjects have tested positive for delayed-type hypersensitivity to soluble leishmania antigen (SLA) and are considered to have subclinical (SC) infection. SC subjects produce less gamma interferon (IFN-γ) and tumor necrosis factor alpha (TNF-α) than do CL patients, but they are able to control the infection. The aim of this study was to characterized the role of CD8(+) T cells in SC infection and in CL. Peripheral blood mononuclear cells (PBMC) were stimulated with SLA to determine the frequencies of CD4(+) IFN-γ(+) and CD8(+) IFN-γ(+) T cells. Monocytes from PBMC were infected with L. braziliensis and cocultured with CD8(+) T cells, and the frequencies of infected monocytes and levels of cytotoxicity markers, target cell apoptosis, and granzyme B were determined. The frequency of CD8(+) IFN-γ(+) cells after SLA stimulation was higher for SC individuals than for CL patients. The frequency of infected monocytes in SC cells was lower than that in CL cells. CL CD8(+) T cells induced more apoptosis of infected monocytes than did SC CD8(+) T cells. Granzyme B production in CD8(+) T cells was higher in CL than in SC cells. While the use of a granzyme B inhibitor decreased the number of apoptotic cells in the CL group, the use of z-VAD-FMK had no effect on the frequency of these cells. These results suggest that CL CD8(+) T cells are more cytotoxic and may be involved in pathology.
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Kaushal H, Bras-Gonçalves R, Negi NS, Lemesre JL, Papierok G, Salotra P. Role of CD8(+) T cells in protection against Leishmania donovani infection in healed Visceral Leishmaniasis individuals. BMC Infect Dis 2014; 14:653. [PMID: 25471494 PMCID: PMC4258298 DOI: 10.1186/s12879-014-0653-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 10/29/2014] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Majority of individuals with history of visceral leishmaniasis (VL) exhibit strong immunity to re-infection, however, the mechanism of resistance is poorly understood. It is unclear whether CD8(+) T cells contribute to protection against Leishmania donovani infection through cytotoxic activity. The present study aims to evaluate immunological mechanism associated with resistance to the disease in healed VL (HVL) individuals and further, the contribution of CD8(+) T cells in the protective immunity. METHODS Peripheral blood mononuclear cells (PBMCs) from VL, HVL and naive groups were exposed in vitro to total soluble Leishmania antigen (TSLA) from L. donovani. The proliferation index was determined by ELISA based lymphoproliferative assay. Cytokines and granzyme B levels were measured by CBA. Activated T-cell populations were estimated using flow cytometry. RESULTS We observed significantly higher lymphoproliferation, cytokines and granzyme B levels in HVL group compared to naive or VL group. More strikingly, we found a strong association (rs = 0.895, P < 0.0001) between proliferation index (PI) and granzyme B level, with a significant proportion of activated CD8(+) T cells in HVL group. CONCLUSIONS Leishmania immune group (HVL) exhibited durable and strong cellular immune response to TSLA in terms of lymphoproliferation as well as production of Th1 cytokines and granzyme B. Additionally, the elevated level of activated CD8(+) T cells and stimulation of cytotoxic activity through granzyme B production, indicated a possible role of CD8(+) T cells in resistance to L. donovani infection in the HVL group.
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Affiliation(s)
- Himanshu Kaushal
- />National Institute of Pathology (ICMR), Safdarjung Hospital Campus, New Delhi, 110029 India
| | - Rachel Bras-Gonçalves
- />Institut de Recherche pour le Développement, UMR177 IRD/CIRAD “INTERTRYP”, Montpellier, France
| | | | - Jean-Loup Lemesre
- />Institut de Recherche pour le Développement, UMR177 IRD/CIRAD “INTERTRYP”, Montpellier, France
| | | | - Poonam Salotra
- />National Institute of Pathology (ICMR), Safdarjung Hospital Campus, New Delhi, 110029 India
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17
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Seyed N, Taheri T, Vauchy C, Dosset M, Godet Y, Eslamifar A, Sharifi I, Adotevi O, Borg C, Rohrlich PS, Rafati S. Immunogenicity evaluation of a rationally designed polytope construct encoding HLA-A*0201 restricted epitopes derived from Leishmania major related proteins in HLA-A2/DR1 transgenic mice: steps toward polytope vaccine. PLoS One 2014; 9:e108848. [PMID: 25310094 PMCID: PMC4195657 DOI: 10.1371/journal.pone.0108848] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 08/22/2014] [Indexed: 11/18/2022] Open
Abstract
Background There are several reports demonstrating the role of CD8 T cells against Leishmania species. Therefore peptide vaccine might represent an effective approach to control the infection. We developed a rational polytope-DNA construct encoding immunogenic HLA-A2 restricted peptides and validated the processing and presentation of encoded epitopes in a preclinical mouse model humanized for the MHC-class-I and II. Methods and Findings HLA-A*0201 restricted epitopes from LPG-3, LmSTI-1, CPB and CPC along with H-2Kd restricted peptides, were lined-up together as a polytope string in a DNA construct. Polytope string was rationally designed by harnessing advantages of ubiquitin, spacers and HLA-DR restricted Th1 epitope. Endotoxin free pcDNA plasmid expressing the polytope was inoculated into humanized HLA-DRB1*0101/HLA-A*0201 transgenic mice intramuscularly 4 days after Cardiotoxin priming followed by 2 boosters at one week interval. Mice were sacrificed 10 days after the last booster, and splenocytes were subjected to ex-vivo and in-vitro evaluation of specific IFN-γ production and in-vitro cytotoxicity against individual peptides by ELISpot and standard chromium-51(51Cr) release assay respectively. 4 H-2Kd and 5 HLA-A*0201 restricted peptides were able to induce specific CD8 T cell responses in BALB/C and HLA-A2/DR1 mice respectively. IFN-γ and cytolytic activity together discriminated LPG-3-P1 as dominant, LmSTI-1-P3 and LmSTI-1-P6 as subdominant with both cytolytic activity and IFN-γ production, LmSTI-1-P4 and LPG-3-P5 as subdominant with only IFN-γ production potential. Conclusions Here we described a new DNA-polytope construct for Leishmania vaccination encompassing immunogenic HLA-A2 restricted peptides. Immunogenicity evaluation in HLA-transgenic model confirmed CD8 T cell induction with expected affinities and avidities showing almost efficient processing and presentation of the peptides in relevant preclinical model. Further evaluation will determine the efficacy of this polytope construct protecting against infectious challenge of Leishmania. Fortunately HLA transgenic mice are promising preclinical models helping to speed up immunogenicity analysis in a human related mouse model.
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Affiliation(s)
- Negar Seyed
- Molecular Immunology and Vaccine Research Lab, Pasteur Institute of Iran, Tehran, Iran
| | - Tahereh Taheri
- Molecular Immunology and Vaccine Research Lab, Pasteur Institute of Iran, Tehran, Iran
| | - Charline Vauchy
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
| | - Magalie Dosset
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
| | - Yann Godet
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
| | - Ali Eslamifar
- Department of Electron Microscopy and Clinical Research, Pasteur Institute of Iran, Tehran, Iran
| | - Iraj Sharifi
- School of Medicine, Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Olivier Adotevi
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
- CHRU de Besançon, Service d′Oncologie, Besançon, France
| | - Christophe Borg
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
- CHRU de Besançon, Service d′Oncologie, Besançon, France
| | - Pierre Simon Rohrlich
- INSERM U1098, Unité Mixte de Recherche, Besançon, France
- Etablissement Français du Sang de Bourgogne Franche-Comté, Besançon, France
- Université de Franche-Comté, Besançon, France
- CHRU de Besançon, Service de pédiatrie, Besançon, France
| | - Sima Rafati
- Molecular Immunology and Vaccine Research Lab, Pasteur Institute of Iran, Tehran, Iran
- * E-mail:
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18
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da Silva Santos C, Brodskyn CI. The Role of CD4 and CD8 T Cells in Human Cutaneous Leishmaniasis. Front Public Health 2014; 2:165. [PMID: 25325049 PMCID: PMC4178373 DOI: 10.3389/fpubh.2014.00165] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 09/13/2014] [Indexed: 12/23/2022] Open
Abstract
Leishmaniasis, caused by infection with parasites of the Leishmania genus, affects millions of individuals worldwide. This disease displays distinct clinical manifestations ranging from self-healing skin lesions to severe tissue damage. The control of Leishmania infection is dependent on cellular immune mechanisms, and evidence has shown that CD4 and CD8 T lymphocytes play different roles in the outcome of leishmaniasis. Although the presence of CD4 T cells is important for controlling parasite growth, the results in the literature suggest that the inflammatory response elicited by these cells could contribute to the pathogenesis of lesions. However, recent studies on CD8 T lymphocytes show that these cells are mainly involved in tissue damage through cytotoxic mechanisms. In this review, we focus on the recent advances in the study of the human adaptive immunological response in the pathogenesis of tegumentary leishmaniasis.
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Affiliation(s)
- Claire da Silva Santos
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (Fiocruz) Bahia , Salvador , Brazil
| | - Cláudia Ida Brodskyn
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (Fiocruz) Bahia , Salvador , Brazil ; Faculdade de Medicina da Universidade Federal da Bahia , Salvador , Brazil ; Instituto de Investigação em Imunologia - Instituto Nacional de Ciência e Tecnologia (iii-INCT) , Salvador , Brazil
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19
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Villarino N, Schmidt NW. CD8 + T Cell Responses to Plasmodium and Intracellular Parasites. ACTA ACUST UNITED AC 2014; 9:169-178. [PMID: 24741372 PMCID: PMC3983867 DOI: 10.2174/1573395509666131126232327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/14/2013] [Accepted: 11/19/2013] [Indexed: 12/29/2022]
Abstract
Parasitic protozoa are major threats to human health affecting millions of people around the world. Control of these infections by the host immune system relies on a myriad of immunological mechanisms that includes both humoral and cellular immunity. CD8+ T cells contribute to the control of these parasitic infections in both animals and humans. Here, we will focus on the CD8+ T cell response against a subset of these protozoa: Plasmodium, Toxoplasma gondii, Leishmania and Trypanosoma cruzi, with an emphasis on experimental rodent systems. It is evident a complex interaction occurs between CD8+ T cells and the invading protozoa. A detailed understanding of how CD8+ T cells mediate protection should provide the basis for the development of effective vaccines that prevent and control infections by these parasites.
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Affiliation(s)
- Nicolas Villarino
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996, USA
| | - Nathan W Schmidt
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996, USA
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20
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Novais FO, Carvalho LP, Graff JW, Beiting DP, Ruthel G, Roos DS, Betts MR, Goldschmidt MH, Wilson ME, de Oliveira CI, Scott P. Cytotoxic T cells mediate pathology and metastasis in cutaneous leishmaniasis. PLoS Pathog 2013; 9:e1003504. [PMID: 23874205 PMCID: PMC3715507 DOI: 10.1371/journal.ppat.1003504] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 06/02/2013] [Indexed: 01/05/2023] Open
Abstract
Disease progression in response to infection can be strongly influenced by both pathogen burden and infection-induced immunopathology. While current therapeutics focus on augmenting protective immune responses, identifying therapeutics that reduce infection-induced immunopathology are clearly warranted. Despite the apparent protective role for murine CD8⁺ T cells following infection with the intracellular parasite Leishmania, CD8⁺ T cells have been paradoxically linked to immunopathological responses in human cutaneous leishmaniasis. Transcriptome analysis of lesions from Leishmania braziliensis patients revealed that genes associated with the cytolytic pathway are highly expressed and CD8⁺ T cells from lesions exhibited a cytolytic phenotype. To determine if CD8⁺ T cells play a causal role in disease, we turned to a murine model. These studies revealed that disease progression and metastasis in L. braziliensis infected mice was independent of parasite burden and was instead directly associated with the presence of CD8⁺ T cells. In mice with severe pathology, we visualized CD8⁺ T cell degranulation and lysis of L. braziliensis infected cells. Finally, in contrast to wild-type CD8⁺ T cells, perforin-deficient cells failed to induce disease. Thus, we show for the first time that cytolytic CD8⁺ T cells mediate immunopathology and drive the development of metastatic lesions in cutaneous leishmaniasis.
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MESH Headings
- Animals
- Bacterial Proteins/genetics
- Bacterial Proteins/metabolism
- Brazil
- Cytotoxicity, Immunologic
- Disease Models, Animal
- Disease Progression
- Gene Expression Profiling
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Humans
- Leishmania braziliensis/immunology
- Leishmania braziliensis/isolation & purification
- Leishmaniasis, Cutaneous/immunology
- Leishmaniasis, Cutaneous/parasitology
- Leishmaniasis, Cutaneous/pathology
- Leishmaniasis, Cutaneous/physiopathology
- Leishmaniasis, Diffuse Cutaneous/etiology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Skin/immunology
- Skin/parasitology
- Skin/pathology
- Specific Pathogen-Free Organisms
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/parasitology
- T-Lymphocytes, Cytotoxic/pathology
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Affiliation(s)
- Fernanda O. Novais
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Lucas P. Carvalho
- Instituto Nacional de Ciência e Tecnologia de Doenças Tropicais-INCT-DT(CNPq/MCT), Serviço de Imunologia, Hospital Universitario Prof. Edgard Santos, Universidade Federal da Bahia Salvador, Bahia, Brazil
| | - Joel W. Graff
- Iowa City VA Medical Center, Iowa City, Iowa, United States of America
| | - Daniel P. Beiting
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Gordon Ruthel
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - David S. Roos
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Michael R. Betts
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Michael H. Goldschmidt
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Mary E. Wilson
- Iowa City VA Medical Center, Iowa City, Iowa, United States of America
| | | | - Phillip Scott
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
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21
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Santos CDS, Boaventura V, Ribeiro Cardoso C, Tavares N, Lordelo MJ, Noronha A, Costa J, Borges VM, de Oliveira CI, Van Weyenbergh J, Barral A, Barral-Netto M, Brodskyn CI. CD8(+) granzyme B(+)-mediated tissue injury vs. CD4(+)IFNγ(+)-mediated parasite killing in human cutaneous leishmaniasis. J Invest Dermatol 2013; 133:1533-40. [PMID: 23321919 PMCID: PMC3667352 DOI: 10.1038/jid.2013.4] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A protective or deleterious role of CD8+T cells in human cutaneous leishmaniasis (CL) has been debated. The present report explores the participation of CD8+T cells in disease pathogenesis as well as in parasite killing. CD8+T cells accumulated in CL lesions as suggested by a higher frequency of CD8+CD45RO+T cells and CD8+CLA+T cells compared with peripheral blood mononuclear cells. Upon Leishmania braziliensis restimulation, most of the CD8+T cells from the lesion expressed cytolytic markers, CD107a and granzyme B. Granzyme B expression in CL lesions positively correlated with lesion size and percentage of TUNEL-positive cells. We also observed a significantly higher percentage of TUNEL-positive cells and granzyme B expression in the biopsies of patients showing a more intense necrotic process. Furthermore, coculture of infected macrophages and CD8+T lymphocytes resulted in the release of granzyme B, and the use of granzyme B inhibitor, as well as z-VAD, Fas:Fc, or anti-IFN-γ, had no effect upon parasite killing. However, coculture of infected macrophages with CD4+T cells strongly increased parasite killing, which was completely reversed by anti-IFN-γ. Our results reveal a dichotomy in human CL: CD8+ granzyme B+T cells mediate tissue injury, whereas CD4+IFN-γ+T cells mediate parasite killing.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Johan Van Weyenbergh
- Rega Institute for Medical Research, Department of Microbiology and Immunology, KU Leuven, Belgium
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22
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Palmeiro MR, Morgado FN, Valete-Rosalino CM, Martins AC, Moreira J, Quintella LP, de Oliveira Schubach A, Conceição-Silva F. Comparative study of the in situ immune response in oral and nasal mucosal leishmaniasis. Parasite Immunol 2012; 34:23-31. [PMID: 22098533 DOI: 10.1111/j.1365-3024.2011.01343.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mucosal Leishmaniasis (ML) may occur in both nasal and oral mucosa. However, despite the impressive tissue destruction, little is known about the oral involvement. To compare some changes underlying inflammation in oral and nasal ML, we performed immunohistochemistry on mucosal tissue of 20 patients with ML (nasal [n = 12]; oral [n = 8] lesions) and 20 healthy donors using antibodies that recognize inflammatory markers (CD3, CD4, CD8, CD22, CD68, neutrophil elastase, CD1a, CLA, Ki67, Bcl-2, NOS2, CD62E, Fas and FasL). A significantly larger number of cells, mainly T cells and macrophages, were observed in lesions than in healthy tissue. In addition, high nitric oxide synthase 2 (NOS2) expression was associated with a reduced detection of parasites, highlighting the importance of NOS2 for parasite elimination. Oral lesions had higher numbers of neutrophils, parasites, proliferating cells and NOS2 than nasal lesions. These findings, together with the shorter duration of oral lesions and more intense symptoms, suggest a more recent inflammatory process. It could be explained by lesion-induced oral cavity changes that lead to eating difficulties and social stigma. In addition, the frequent poor tooth conservation and gingival inflammation tend to amplify tissue destruction and symptoms and may impair and confuse the correct diagnosis, thus delaying the onset of specific treatment.
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Affiliation(s)
- M R Palmeiro
- Laboratório de Imunoparasitologia, IOC/FIOCRUZ, Rio de Janeiro, Brasil
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23
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Stäger S, Rafati S. CD8(+) T cells in leishmania infections: friends or foes? Front Immunol 2012; 3:5. [PMID: 22566891 PMCID: PMC3342007 DOI: 10.3389/fimmu.2012.00005] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 01/09/2012] [Indexed: 01/10/2023] Open
Abstract
Host protection against several intracellular pathogens requires the induction of CD8+ T cell responses. CD8+ T cells are potent effector cells that can produce high amounts of pro-inflammatory cytokines and kill infected target cells efficiently. However, a protective role for CD8+ T cells during Leishmania infections is still controversial and largely depends on the infection model. In this review, we discuss the role of CD8+ T cells during various types of Leishmania infections, following vaccination, and as potential immunotherapeutic targets.
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Affiliation(s)
- Simona Stäger
- Institut National de la Recherche Scientifique, Institut Armand Frappier, Université du Québec Laval, QC, Canada
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24
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Characterization of chronic cutaneous lesions from TNF-receptor-1-deficient mice infected by Leishmania major. Clin Dev Immunol 2011; 2012:865708. [PMID: 22203861 PMCID: PMC3235446 DOI: 10.1155/2012/865708] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Accepted: 08/28/2011] [Indexed: 12/19/2022]
Abstract
Leishmania major-infected TNF receptor 1 deficient (TNFR1 KO) mice resolve parasitism but fail to resolve lesions, while wild-type mice completely heal. We investigated the cell composition, cytokine production, and apoptosis in lesions from L. major-infected TNFR1 KO and wild-type (WT) mice. Chronic lesions from L. major-infected TNFR1 KO mice presented larger number of CD8+ T and Ly6G+ cells. In addition, higher concentrations of mRNA for IFN-γ CCL2 and CCL5, as well as protein, but lower numbers of apoptotic cells, were found in lesions from TNFR1 KO mice than in WT, at late time points of infection. Our studies showed that persistent lesions in L. major-infected TNFR1 KO mice may be mediated by continuous migration of cells to the site of inflammation due to the presence of chemokines and also by lower levels of apoptosis. We suggest that this model has some striking similarities to the mucocutaneous clinical form of leishmaniasis.
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25
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Regulation of CD8+ T cell responses to infection with parasitic protozoa. Exp Parasitol 2010; 126:318-25. [PMID: 20493842 DOI: 10.1016/j.exppara.2010.05.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 04/05/2010] [Accepted: 05/15/2010] [Indexed: 11/24/2022]
Abstract
There are over 10,000 species of parasitic protozoa, a subset of which can cause considerable disease in humans. Here we examine in detail the complex immune response generated during infection with a subset of these parasites: Trypanosoma cruzi, Leishmania sp., Toxoplasma gondii, and Plasmodium sp. While these particular species perhaps represent the most studied parasites in terms of understanding how T cells function during infection, it is clear that the lessons learned from this body of work are also relevant to the other protozoa known to induce a CD8(+) T cell response. This review will highlight some of the key studies that established that CD8(+) T cells play a major role in protective immunity to protozoa, the factors that promote the generation as well as maintenance of the CD8(+) T cell response during these infections, and draw attention to some of the gaps in our knowledge. Moreover, the development of new tools, including MHC-Class I tetramer reagents and the use of TCR transgenic mice or genetically modified parasites, has provided a better appreciation of how parasite specific CD8(+) T cell responses are initiated and new insights into their phenotypic plasticity.
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26
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Fonseca I, Silva PV, Lange CC, Guimarães MFM, Weller MMDCA, Sousa KRS, Lopes PS, Guimarães JD, Guimarães SEF. Expression profile of genes associated with mastitis in dairy cattle. Genet Mol Biol 2009; 32:776-81. [PMID: 21637453 PMCID: PMC3036910 DOI: 10.1590/s1415-47572009005000074] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 07/08/2009] [Indexed: 11/21/2022] Open
Abstract
In order to characterize the expression of genes associated with immune response mechanisms to mastitis, we quantified the relative expression of the IL-2, IL-4, IL-6, IL-8, IL-10, IFN-γ and TNF- α genes in milk cells of healthy cows and cows with clinical mastitis. Total RNA was extracted from milk cells of six Black and White Holstein (BW) cows and six Gyr cows, including three animals with and three without mastitis per breed. Gene expression was analyzed by real-time PCR. IL-10 gene expression was higher in the group of BW and Gyr cows with mastitis compared to animals free of infection from both breeds (p < 0.05). It was also higher in BW Holstein animals with clinical mastitis (p < 0.001), but it was not significant when Gyr cows with and without mastitis were compared (0.05 < p < 0.10). Among healthy cows, BW Holstein animals tended to present a higher expression of all genes studied, with a significant difference for the IL-2 and IFN- γ genes (p < 0.001). For animals with mastitis no significant difference in gene expression was observed between the two breeds. These findings suggest that animals with mastitis develop a preferentially cell-mediated immune response. Further studies including larger samples are necessary to better characterize the gene expression profile in cows with mastitis.
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Affiliation(s)
- Isabela Fonseca
- Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, MG Brazil
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27
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Abstract
People who have recovered from leishmaniasis are believed to have long-lasting protection against subsequent infection. Understanding the immunological changes that are associated with protection from cure of and susceptibility to the disease are fundamental to both designing and evaluating vaccine candidates against the leishmaniases. In the quest for a vaccine against leishmaniasis, appropriate surrogate markers of immunity would be valuable and cost effective. Biomarkers would ease screening and selection of potentially efficient vaccine candidates. Moreover, biomarkers of disease may be used to monitor disease and aid therapeutic prognosis. This would be useful in the evaluation of both existing and new drugs, making invasive post-treatment evaluation redundant. Biomarkers may also be indicative of the severity of the disease and may be able to predict the outcome of an infection and indicate whether the patient will spontaneously recover, exhibit mild symptoms or if the disease is disseminating and will be severe. In this article we discuss the immunological changes associated with different forms of human leishmaniasis and the value of appropriate immunological biomarkers in finding an effective vaccine and an evaluation of therapies against leishmanial disease will be given.
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Affiliation(s)
- Susanne Nylén
- Department of Microbiology, Tumor Biology & Cell Biology, Karolinska Institute, Stockholm, Sweden.
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28
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29
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Silvestre R, Cordeiro-Da-Silva A, Santarém N, Vergnes B, Sereno D, Ouaissi A. SIR2-deficient Leishmania infantum induces a defined IFN-gamma/IL-10 pattern that correlates with protection. THE JOURNAL OF IMMUNOLOGY 2007; 179:3161-70. [PMID: 17709531 DOI: 10.4049/jimmunol.179.5.3161] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The ability to manipulate the Leishmania genome to create genetically modified parasites by introducing or eliminating genes is considered a powerful alternative for developing a new generation vaccine against leishmaniasis. Previously, we showed that the deletion of one allele of the Leishmania infantum silent information regulatory 2 (LiSIR2) locus was sufficient to dramatically affect amastigote axenic proliferation. Furthermore, LiSIR2 single knockout (LiSIR2(+/-)) amastigotes were unable to replicate in vitro inside macrophages. Because this L. infantum mutant persisted in BALB/c mice for up to 6 wk but failed to establish an infection, we tested its ability to provide protection toward a virulent L. infantum challenge. Strikingly, vaccination with a single i.p. injection of LiSIR2(+/-) single knockout elicits complete protection. Thus, vaccinated BALB/c mice showed a reversal of T cell anergy with specific anti-Leishmania cytotoxic activity and high levels of NO production. Moreover, vaccinated mice simultaneously generated specific anti-Leishmania IgG Ab subclasses suggestive of both type 1 and type 2 responses. A strong correlation was found between the elimination of the parasites and an increased Leishmania-specific IFN-gamma/IL-10 ratio. Therefore, we propose that the polarization to a high IFN-gamma/low IL-10 ratio after challenge is a clear indicator of vaccine success. Furthermore these mutants, which presented attenuated virulence, represent a good model to understand the correlatives of protection in visceral leishmaniasis.
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Affiliation(s)
- Ricardo Silvestre
- Departamento de Bioquímica da Faculdade de Farmácia da Universidade do Porto, Portugal
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30
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Cabral SM, Silvestre RL, Santarém NM, Tavares JC, Silva AF, Cordeiro-da-Silva A. A Leishmania infantum cytosolic tryparedoxin activates B cells to secrete interleukin-10 and specific immunoglobulin. Immunology 2007; 123:555-65. [PMID: 18028371 DOI: 10.1111/j.1365-2567.2007.02725.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The immune evasion mechanisms of pathogenic trypanosomatids involve a multitude of phenomena such as the polyclonal activation of lymphocytes, cytokine modulation and the enhanced detoxification of oxygen reactive species. A trypanothione cascade seems to be involved in the detoxification process. It was recently described and characterized a tryparedoxin (LiTXN1) involved in Leishmania infantum cytoplasmatic hydroperoxide metabolism. LiTXN1 is a secreted protein that is up-regulated in the infectious form of the parasite, suggesting that it may play an important role during infection. In the present study, we investigated whether recombinant LiTXN1 (rLiTXN1) affects T- and B-cell functions in a murine model. We observed a significant increase in the CD69 surface marker on the B-cell population in total spleen cells and on isolated B cells from BALB/c mice after in vitro rLiTXN1 stimulus. Activated B-cells underwent further proliferation, as indicated by increased [(3)H]thymidine incorporation. Cytokine quantification showed a dose-dependent up-regulation of interleukin (IL)-10 secretion. B cells were identified as a source of this secretion. Furthermore, intraperitoneal injection of rLiTXN1 into BALB/c mice triggered the production of elevated levels of rLiTXN1-specific antibodies, predominantly of the immunoglobulin M (IgM), IgG1 and IgG3 isotypes, with a minimum reactivity against other heterologous antigens. Taken together, our data suggest that rLiTXN1 may participate in immunopathological processes by targeting B-cell effector functions, leading to IL-10 secretion and production of specific antibodies.
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Affiliation(s)
- Sofia Menezes Cabral
- Departamento de Bioquímica, Faculdade de Farmácia and Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
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Reithinger R, Dujardin JC, Louzir H, Pirmez C, Alexander B, Brooker S. Cutaneous leishmaniasis. THE LANCET. INFECTIOUS DISEASES 2007; 7:581-96. [PMID: 17714672 DOI: 10.1016/s1473-3099(07)70209-8] [Citation(s) in RCA: 918] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cutaneous leishmaniasis is endemic in the tropics and neotropics. It is often referred to as a group of diseases because of the varied spectrum of clinical manifestations, which range from small cutaneous nodules to gross mucosal tissue destruction. Cutaneous leishmaniasis can be caused by several Leishmania spp and is transmitted to human beings and animals by sandflies. Despite its increasing worldwide incidence, but because it is rarely fatal, cutaneous leishmaniasis has become one of the so-called neglected diseases, with little interest by financial donors, public-health authorities, and professionals to implement activities to research, prevent, or control the disease. In endemic countries, diagnosis is often made clinically and, if possible, by microscopic examination of lesion biopsy smears to visually confirm leishmania parasites as the cause. The use of more sophisticated diagnostic techniques that allow for species identification is usually restricted to research or clinical settings in non-endemic countries. The mainstays of cutaneous leishmaniasis treatment are pentavalent antimonials, with new oral and topical treatment alternatives only becoming available within the past few years; a vaccine currently does not exist. Disease prevention and control are difficult because of the complexity of cutaneous leishmaniasis epizoology, and the few options available for effective vector control.
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32
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Mussi SV, Fernandes AP, Ferreira LAM. Comparative study of the efficacy of formulations containing fluconazole or paromomycin for topical treatment of infections by Leishmania (Leishmania) major and Leishmania (Leishmania) amazonensis. Parasitol Res 2007; 100:1221-6. [PMID: 17206508 DOI: 10.1007/s00436-006-0394-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2006] [Accepted: 11/14/2006] [Indexed: 11/28/2022]
Abstract
The development of alternative therapeutic approaches for cutaneous leishmaniasis (CL) has received considerable attention in recent research, including the identification of formulations for topical treatment. In the present study, the activity of two formulations was evaluated in BALB/c mice experimentally infected with either Leishmania (Leishmania) major or L. (L.) amazonensis, a hydrophilic gel containing 10% paromomycin (PAHG) and a cream containing 1% fluconazole (FLUC). After development of ulcerated lesions, infected mice were divided into three groups of five animals each: (1) PA group: Lesions were covered with 50 microl of PAHG; (2) FLUC group: Lesions were covered with 50 microl of FLUC, and (3) placebo group: treated with gel without paromomycin. During and after treatment, the size of lesions was determined weekly using a caliper. The efficacy of PAHG was significantly higher than that observed for FLUC for both Leishmania species. The PAHG formulation was effective in promoting the healing of ulcers in all animals 28 days after the beginning of treatment, whereas none of the animals was cured by FLUC. These results suggest that the PAHG formulation could be suitable for clinical studies and may represent an alternative formulation for the topical treatment of CL.
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Affiliation(s)
- Samuel Vidal Mussi
- Department of Pharmaceuticals, Faculty of Pharmacy, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos, 6627, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
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Faria DR, Gollob KJ, Barbosa J, Schriefer A, Machado PRL, Lessa H, Carvalho LP, Romano-Silva MA, de Jesus AR, Carvalho EM, Dutra WO. Decreased in situ expression of interleukin-10 receptor is correlated with the exacerbated inflammatory and cytotoxic responses observed in mucosal leishmaniasis. Infect Immun 2006; 73:7853-9. [PMID: 16299275 PMCID: PMC1307048 DOI: 10.1128/iai.73.12.7853-7859.2005] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Human infection with Leishmania braziliensis can lead to cutaneous leishmaniasis (CL) or mucosal leishmaniasis (ML). We hypothesize that the intense tissue destruction observed in ML is a consequence of an uncontrolled exacerbated inflammatory immune response, with cytotoxic activity. For the first time, this work identifies the cellular sources of inflammatory and antiinflammatory cytokines, the expression of effector molecules, and the expression of interleukin-10 (IL-10) receptor in ML and CL lesions by using confocal microscopy. ML lesions displayed a higher number of gamma interferon (IFN-gamma)-producing cells than did CL lesions. In both ML and CL, CD4+ cells represented the majority of IFN-gamma-producing cells, followed by CD8+ cells and CD4- CD8- cells. The numbers of tumor necrosis factor alpha-positive cells, as well as those of IL-10-producing cells, were similar in ML and CL lesions. The effector molecule granzyme A showed greater expression in ML than in CL lesions, while inducible nitric oxide synthase did not. Finally, the expression of IL-10 receptor was lower in ML than in CL lesions. Thus, our data identified distinct cytokine and cell population profiles for CL versus ML patients and provide a possible mechanism for the development of ML disease through the demonstration that low expression of IL-10 receptor is present in conjunction with a cytotoxic and inflammatory profile in ML.
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Affiliation(s)
- Daniela R Faria
- Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Brazil
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34
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Bertholet S, Debrabant A, Afrin F, Caler E, Mendez S, Tabbara KS, Belkaid Y, Sacks DL. Antigen requirements for efficient priming of CD8+ T cells by Leishmania major-infected dendritic cells. Infect Immun 2005; 73:6620-8. [PMID: 16177338 PMCID: PMC1230980 DOI: 10.1128/iai.73.10.6620-6628.2005] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CD4(+) and CD8(+) T-cell responses have been shown to be critical for the development and maintenance of acquired resistance to infections with the protozoan parasite Leishmania major. Monitoring the development of immunodominant or clonally restricted T-cell subsets in response to infection has been difficult, however, due to the paucity of known epitopes. We have analyzed the potential of L. major transgenic parasites, expressing the model antigen ovalbumin (OVA), to be presented by antigen-presenting cells to OVA-specific OT-II CD4(+) or OT-I CD8(+) T cells. Truncated OVA was expressed in L. major as part of a secreted or nonsecreted chimeric protein with L. donovani 3' nucleotidase (NT-OVA). Dendritic cells (DC) but not macrophages infected with L. major that secreted NT-OVA could prime OT-I T cells to proliferate and release gamma interferon. A diminished T-cell response was observed when DC were infected with parasites expressing nonsecreted NT-OVA or with heat-killed parasites. Inoculation of mice with transgenic parasites elicited the proliferation of adoptively transferred OT-I T cells and their recruitment to the site of infection in the skin. Together, these results demonstrate the possibility of targeting heterologous antigens to specific cellular compartments in L. major and suggest that proteins secreted or released by L. major in infected DC are a major source of peptides for the generation of parasite-specific CD8(+) T cells. The ability of L. major transgenic parasites to activate OT-I CD8(+) T cells in vivo will permit the analysis of parasite-driven T-cell expansion, differentiation, and recruitment at the clonal level.
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Affiliation(s)
- Sylvie Bertholet
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
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35
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Becker I, Salaiza N, Aguirre M, Delgado J, Carrillo-Carrasco N, Kobeh LG, Ruiz A, Cervantes R, Torres AP, Cabrera N, González A, Maldonado C, Isibasi A. Leishmania lipophosphoglycan (LPG) activates NK cells through toll-like receptor-2. Mol Biochem Parasitol 2003; 130:65-74. [PMID: 12946842 DOI: 10.1016/s0166-6851(03)00160-9] [Citation(s) in RCA: 273] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Toll-like receptors (TLRs) mediate the cellular response to conserved molecular patterns shared by microorganisms. We report that TLR-2 on human NK cells is upregulated and stimulated by Leishmania major lipophosphoglycan (LPG), a phosphoglycan belonging to a family of unique Leishmania glycoconjugates. We found that purified L. major LPG upregulates both mRNA and the membrane expression of TLR-2 in NK cells. Additionally, IFN-gamma and TNF-alpha production and nuclear translocation of NF-kappaB was enhanced. The activation effect was more intense with LPG purified from infectious metacyclic parasites than from noninfectious procyclic Leishmania. Since the difference between the molecules derived from these two stages of the parasite growth cycle lies exclusively in the number of phosphosaccharide repeat domains and in the composition of glycan side chains that branch off these domains, we propose that TLR-2 possibly distinguishes between phosphorylated glycan repeats on LPG molecules. The effect of LPG on cytokine production and on membrane expression of TLR-2 could be blocked with F(ab')2 fragments of the mAb against LPG (WIC 79.3). Confocal microscopy demonstrated the co-localization of LPG and TLR-2 on the NK cell membrane. Binding of LPG to TLR-2 in NK cells was demonstrated by immunoprecipitations done with anti-TLR-2 and anti-LPG mAb followed by immunoblotting with anti-LPG and anti-TLR-2, respectively. Both antibodies recognized the immune complexes. These results suggest that NK cells are capable of recognition of, and activation by, Leishmania LPG through TLR-2, enabling them to participate autonomously in the innate immune system and thereby increasing the effective destruction of the parasite.
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Affiliation(s)
- Ingeborg Becker
- Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Dr. Balmis 148, Colonia Doctores, 06726 Mexico D.F., Mexico.
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36
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Abstract
American cutaneous leishmaniasis is endemic in widespread areas of Latin America. The causative agents include L. (V.) braziliensis, L. (L.) mexicana, L. (V.) panamensis, and related species. The spectrum of disease includes single, localized, cutaneous ulcers, diffuse cutaneous leishmaniasis, and mucosal disease. The main reservoirs for L. (V.) braziliensis and other Leishmania (Vianna) spp. are small forest rodents. The vectors are ground-dwelling or arboreal Lutzomyia sandflies, which are abundant in the forest. Disease is most common in persons working at the edge of the forest and among rural settlers. The incubation period of cutaneous leishmaniasis varies from two weeks to several months. A wide variety of skin manifestations ranging from small, dry, crusted lesions to large, deep, mutilating ulcers may be seen. Ulcerative lesions are usually shallow and circular with well-defined, raised borders and a bed of granulation tissue. In L. (V.) braziliensis infection, regional lymphadenopathy often precedes the development of cutaneous lesions by one to 12 weeks. A definite diagnosis depends on the identification of amastigotes in tissue or promastigotes in culture. Antileishmanial antibodies are present in the serum of some patients with cutaneous leishmaniasis as detected by ELISA, immunofluorescent assays, direct agglutination tests or other assays, but the titers are usually low. The leishmanin skin test result usually becomes positive during the course of the disease. For treatment two pentavalent antimony-containing drugs are used: stibogluconate sodium, and meglumine antimoniate (Glucantime). Amphotericin B deoxycholate is an alternative for persons who fail to respond to pentavalent antimony. Immunoprophylaxis and immunotherapy are promising new approaches to prevention and treatment.
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Affiliation(s)
- Bernardo Gontijo
- Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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37
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Bacellar O, Lessa H, Schriefer A, Machado P, Ribeiro de Jesus A, Dutra WO, Gollob KJ, Carvalho EM. Up-regulation of Th1-type responses in mucosal leishmaniasis patients. Infect Immun 2002; 70:6734-40. [PMID: 12438348 PMCID: PMC132996 DOI: 10.1128/iai.70.12.6734-6740.2002] [Citation(s) in RCA: 244] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The cytokine profile produced by peripheral blood mononuclear cells (PBMC) in response to leishmania antigens and the ability of interleukin-10 (IL-10) and transforming growth factor beta (TGF-beta) to modulate the immune response were evaluated in 21 mucosal leishmaniasis patients. Patients with mucosal disease exhibited increased gamma interferon (IFN-gamma) and tumor necrosis factor alpha (TNF-alpha) secretion and decreased IL-10 secretion compared to patients with classical cutaneous leishmaniasis. CD4(+) Th1 cells were the main source of IFN-gamma and TNF-alpha production in mucosal leishmaniasis patients. Evaluation of cytokine gene expression in PBMC of these patients showed that there was strong up-regulation of IFN-gamma transcripts upon stimulation with leishmania antigen, in contrast to the baseline levels of IL-10 mRNA. IL-10 suppressed IFN-gamma production by 48% in cell cultures from cutaneous leishmaniasis patients and by 86% in cell cultures from healthy subjects stimulated with purified protein derivative, whereas in similar conditions IL-10 suppressed IFN-gamma production by 19% in cell cultures from mucosal leishmaniasis patients stimulated with leishmania antigen. TGF-beta suppressed IFN-gamma levels to a greater extent in healthy subjects than in mucosal leishmaniasis and cutaneous leishmaniasis patients. These data indicate that a poorly modulated T-cell response in mucosal leishmaniasis patients leads to production of high levels of proinflammatory cytokines, such as IFN-gamma and TNF-alpha, as well as a decreased ability of IL-10 and TGF-beta to modulate this response. These abnormalities may be the basis for the pathological findings observed in this disease.
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Affiliation(s)
- Olívia Bacellar
- Serviço de Imunologia do Hospital Universitário Prof. Edgard Santos, Universidade Federal da Bahia, Salvador, Brazil
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Salaiza-Suazo N, Volkow P, Tamayo R, Moll H, Gillitzer R, Pérez-Torres A, Pérez-Montfort R, Domínguez JD, Velasco-Castrejón O, Crippa M, Becker I. Treatment of two patients with diffuse cutaneous leishmaniasis caused by Leishmania mexicana modifies the immunohistological profile but not the disease outcome. Trop Med Int Health 1999; 4:801-11. [PMID: 10632987 DOI: 10.1046/j.1365-3156.1999.00491.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Two patients with diffuse cutaneous leishmaniasis caused by Leishmania mexicana were treated with two leishmanicidal drugs (pentamidine and allopurinol) combined with recombinant interferon-gamma restoring Th-1 favouring conditions in the patients. Parasites decreased dramatically in the lesions and macrophages diminished concomitantly, while IL-12-producing Langerhans cells and interferon-gamma- producing NK and CD8 + lymphocytes increased in a reciprocal manner. The CD4+/CD8 + ratio in the peripheral blood normalized. During exogenous administration of interferon-gamma the parasites' capacity to inhibit the oxidative burst of the patients' monocytes was abolished. Even though Th-1-favouring conditions were restored, both patients relapsed two months after therapy was discontinued. We conclude that the tendency to develop a disease-promoting Th-2 response in DCL patients is unaffected by, and independent of, parasite numbers. Even though intensive treatment in DCL patients induced Th-1 disease restricting conditions, the disease-promoting immunomodulation of few persistent Leishmania sufficed to revert the immune response.
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Affiliation(s)
- N Salaiza-Suazo
- Departamento de Medicina Experimental, Faculdad de Medicina, UNAM, Mexico
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Russo DM, Chakrabarti P, Higgins AY. Leishmania: naive human T cells sensitized with promastigote antigen and IL-12 develop into potent Th1 and CD8(+) cytotoxic effectors. Exp Parasitol 1999; 93:161-70. [PMID: 10529358 DOI: 10.1006/expr.1999.4452] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Russo, D. M., Chakrabarti, P., and Higgins, A. Y. 1999. Leishmania: Naive human T cells sensitized with promastigote antigen and IL-12 develop into potent Th1 and CD8(+) cytotoxic effectors. Experimental Parasitology 93, 161-170. The differentiation of naive human T cells into Leishmania-specific Th1 or cytotoxic effector cells was examined by sensitizing T cells in vitro with dead Leishmania antigen in the presence or absence of IFN-gamma or IL-12. These Leishmania-specific T cell lines proliferated and produced cytokines in response to challenge with autologous Leishmania-infected macrophages. Sensitization in the presence of IL-12 or IFN-gamma induced Leishmania-specific human Th1 responses, with IL-12 inducing more potent Th1 responses. However, IL-12-induced Th1 responses were IFN-gamma dependent. T cell lines exhibited Th2 or Th0 phenotypes when primed in the absence of cytokines. Only T cell lines primed in the presence of IL-12 contained high percentages of CD8(+) cells. These cells lysed autologous Leishmania-infected but not uninfected macrophages in an MHC-dependent manner. Thus, this in vitro sensitization system can be used to delineate the conditions for optimally priming human Leishmania-specific effector cells.
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Affiliation(s)
- D M Russo
- Department of Microbiology, Meharry Medical College, Nashville, Tennessee 37208, USA
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Kopecký J, Kuthejlová M, Pechová J. Salivary gland extract from Ixodes ricinus ticks inhibits production of interferon-gamma by the upregulation of interleukin-10. Parasite Immunol 1999; 21:351-6. [PMID: 10417669 DOI: 10.1046/j.1365-3024.1999.00233.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Tick saliva has been shown to modulate host immunity by a so far unknown mechanism. We have demonstrated an inverted effect of salivary gland extract (SGE), derived from partially fed Ixodes ricinus females, on the production of two cytokines, interferon (IFN)-gamma and interleukin (IL)-10, in vitro. While SGE markedly suppressed the elaboration of IFN-gamma by mouse splenocytes stimulated with lipopolysaccharide (LPS), the production of IL-10 was increased in comparison with SGE-untreated cultures. The suppressive effect of SGE could be abolished by the addition of an IL-10 neutralizing monoclonal antibody to splenocyte cultures. Similar results were obtained when live Borrelia afzelii spirochetes, which are transmitted in Europe by I. ricinus ticks, were used for the cytokine induction. These results suggest that tick saliva can upregulate the IL-10 production at the tick feeding site, which consecutively inhibits the elaboration of pro-inflammatory cytokines, for example IFN-gamma. This immunosuppression may facilitate the establishment of tick-transmitted pathogens in the host.
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Affiliation(s)
- J Kopecký
- Institute of Parasitology, Academy of Sciences of the Czech Republic, and Faculty of Biology, University of South Bohemia, Branisovská 31, 37005 Ceské Budejovice, Czech Republic
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Toossi Z, Ellner JJ. The role of TGF beta in the pathogenesis of human tuberculosis. CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY 1998; 87:107-14. [PMID: 9614924 DOI: 10.1006/clin.1998.4528] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Z Toossi
- Case Western Reserve University, Cleveland, Ohio, USA
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42
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Abstract
The cell-mediated immune response is critical in the resistance to and recovery from leishmaniasis. Cytokines are central elements in mounting an immune response and have received a great deal of attention in both human and experimental leishmaniasis. IFN-gamma is responsible for macrophage activation leading to leishmanicidal mechanisms. Understanding the balance of cytokines that lead to enhanced production of or synergize with IFN-gamma, and those cytokines that counterbalance its effects is fundamental for developing rational immunotherapeutic or immunoprophylactic approaches to leishmaniasis. Here we focus on the cytokine balance in human leishmaniasis, particularly IL-10 as an IFN-gamma opposing cytokine, and IL-12 as an IFN-gamma inducer. The effects of these cytokines were evaluated in terms of several parameters of the human immune response. IL-10 reduced lymphocyte proliferation, IFN-gamma production and cytotoxic activity of responsive human peripheral blood mononuclear cells. Neutralization of IL-10 led to partial restoration of lymphoproliferation, IFN-gamma production and cytotoxic activity in unresponsive visceral leishmaniasis patients. IL-12 also restored the responses of peripheral blood mononuclear cells from visceral leishmaniasis patients. The responses obtained with IL-12 are higher than those obtained with anti-IL-10, even when anti-IL-10 is combined with anti-IL-4.
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Affiliation(s)
- M Barral-Netto
- Centro de Pesquisas Gonçalo Moniz, FIOCRUZ, Salvador, BA, Brasil.
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Vouldoukis I, Bécherel PA, Riveros-Moreno V, Arock M, da Silva O, Debré P, Mazier D, Mossalayi MD. Interleukin-10 and interleukin-4 inhibit intracellular killing of Leishmania infantum and Leishmania major by human macrophages by decreasing nitric oxide generation. Eur J Immunol 1997; 27:860-5. [PMID: 9130636 DOI: 10.1002/eji.1830270409] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The host response to Leishmania infection is regulated by a specific pattern of local cytokine production. We investigated the effect of interleukin (IL)-10 and IL-4 on the leishmanicidal activity of human macrophages (M phi). As with L. major, intracellular killing of L. infantum by human M phi was obtained following ligation of surface CD23 or cell treatment with interferon-gamma (IFN-gamma). This leishmanicidal activity required nitric oxide (NO) generation by activated M phi, and it was partially mimicked by cell treatment with chemical NO donors. Addition of recombinant human IL-10 or IL-4 to CD23 mAb or IFN-gamma decreased L. infantum and L. major killing by infected M phi. IL-10 was more potent than IL-4 in inhibiting the leishmanicidal activity of human M phi. Inhibition of Leishmania killing by IL-4 and IL-10 correlated with decreased NO generation from M phi, and was reversed when exogenous NO was added to cell cultures. Therefore, IL-10 and IL-4 down-regulate leishmanicidal activity of human M phi, in part by inhibiting NO generation by these cells.
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Affiliation(s)
- I Vouldoukis
- INSERM U318, Pitié-Salpêtrière Hospital, Paris, France
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44
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Scharton-Kersten TM, Sher A. Role of natural killer cells in innate resistance to protozoan infections. Curr Opin Immunol 1997; 9:44-51. [PMID: 9039777 DOI: 10.1016/s0952-7915(97)80157-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Natural killer cells are now recognized as major effectors of innate resistance to protozoan parasites. The principal mechanism by which they control the growth of these pathogens is indirect, involving cytokine production rather than cytolytic activity. Recent studies have identified a series of positive and negative signals provided by cytokines and cellular interactions which regulate protozoa-induced natural killer cell function.
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Affiliation(s)
- T M Scharton-Kersten
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute for Allergy and Infectious Diseases, 9000 Rockville Pike, Building 4, Room 126, Bethesda, MD 20892-0425, USA.
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