1
|
Araujo Flores GV, Sandoval Pacheco CM, Ferreira AF, Tomokane TY, Nunes JB, Colombo FA, Sosa-Ochoa WH, Zúniga C, Silveira FT, Corbett CEP, Laurenti MD. Leishmania (L.) infantum chagasi isolated from skin lesions of patients affected by non-ulcerated cutaneous leishmaniasis lead to visceral lesion in hamsters. Parasitol Int 2023; 93:102723. [PMID: 36566911 DOI: 10.1016/j.parint.2022.102723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
In Central America, Leishmania (L.) infantum chagasi infection causes visceral leishmaniasis (VL) and non-ulcerated cutaneous leishmaniasis (NUCL). The aim of the present study was to evaluate the course of an experimental infection in hamsters caused by L. (L.) infantum chagasi isolated from patients affected by NUCL compared with a strain isolated from a patient with VL. Stationary phase parasites in culture were inoculated through subcutaneous and intraperitoneal routes in hamsters. Following the post-infection times, a histopathological study, parasite load and cytokine determination in skin from the cutaneous inoculation site and viscera were performed. Animals subcutaneously infected with the different strains did not develop macroscopic lesions at the inoculation site, and the histopathological changes in the dermis were very slight. Regarding the histopathological study of the viscera, we observed the portal mononuclear inflammatory infiltrate, the presence of nodules in the hepatic parenchyma and the proliferation of macrophages in the spleen, which increased over the infection course. Overall, the parasite load in the liver and spleen and in the total IgG titres in the sera of infected hamster showed an increase with the time of infection, regardless of the route of inoculation. Regarding cellular immunity, we did not observe an increase or decrease in pro- and anti-inflammatory cytokines compared to the healthy control, except for IL-10, which was evident in the infected animals. The data showed that strains isolated from NUCL cause visceral lesions in the hamsters regardless of the route of inoculation, and they were similar to parasites isolated from VL humans.
Collapse
Affiliation(s)
- Gabriela V Araujo Flores
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Carmen M Sandoval Pacheco
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Aurea F Ferreira
- Laboratório de Investigação Médica, LIM50, Hospital das Clinicas, Faculdade de Medicina, Universidade de São Paulo, HCFMUSP, SP, Brazil
| | - Thaise Yumie Tomokane
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | | | - Wilfredo H Sosa-Ochoa
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil; Instituto de Investigaciones en Microbiologia, Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
| | - Concepción Zúniga
- Departamento de Vigilancia de la Salud, Hospital Escuela, Tegucigalpa, Honduras
| | - Fernando T Silveira
- Instituto Evandro Chagas, Belém, PA, Brazil; Universidade Federal do Pará, Belém, PA, Brazil
| | - Carlos E P Corbett
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Márcia D Laurenti
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| |
Collapse
|
2
|
Tafuri WL, Tomokane TY, Silva AMG, Kanashiro‐Galo L, Mosser DM, Quaresma JAS, Pagliari C, Sotto MN. Skin fibrosis associated with keloid, scleroderma and Jorge Lobo's disease (lacaziosis): An immuno-histochemical study. Int J Exp Pathol 2022; 103:234-244. [PMID: 36183172 PMCID: PMC9664412 DOI: 10.1111/iep.12456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/08/2022] [Accepted: 07/27/2022] [Indexed: 11/30/2022] Open
Abstract
Fibrosis is a common pathophysiological response of many tissues and organs subjected to chronic injury. Despite the diverse aetiology of keloid, lacaziosis and localized scleroderma, the process of fibrosis is present in the pathogenesis of all of these three entities beyond other individual clinical and histological distinct characteristics. Fibrosis was studied in 20 samples each of these three chronic cutaneous inflammatory diseases. An immunohistochemical study was carried out to explore the presence of α-smooth muscle actin (α-SMA) and vimentin cytoskeleton antigens, CD31, CD34, Ki67, p16; CD105, CD163, CD206 and FOXP3 antigens; and the central fibrotic cytokine TGF-β. Higher expression of vimentin in comparison to α-SMA in all three lesion types was found. CD31- and CD34-positive blood vessel endothelial cells were observed throughout the reticular dermis. Ki67 expression was low and almost absent in scleroderma. p16-positive levels were higher than ki67 and observed in reticular dermis of keloidal collagen in keloids, in collagen bundles in scleroderma and in the external layers of the granulomas in lacaziosis. The presence of α-actin positive cells and rarely CD34 positive cells, observed primarily in keloids, may be related to higher p16 antigen expression, a measure of cell senescence. Low FOXP3 expression was observed in all lesion types. CD105-positive cells were mainly found in perivascular tissue in close contact with the adventitia in keloids and scleroderma, while, in lacaziosis, these cells were chiefly observed in conjunction with collagen deposition in the external granuloma layer. We did not find high involvement of CD163 or CD206-positive cells in the fibrotic process. TGF-β was notable only in keloid and lacaziosis lesions. In conclusion, we have suggested vimentin to be the main myofibroblast general marker of the fibrotic process in all three studied diseases, while endothelial-to-mesenchymal transition (EndoMT) and mesenchymal stem cells (MSCs) and M2 macrophages may not play an important role.
Collapse
Affiliation(s)
- Wagner Luiz Tafuri
- Departamento de Patologia GeralInstituto de Ciências BiológicasUniversidade Federal de Minas GeraisBelo HorizonteBrazil
- Faculdade de Medicina, Departamento de PatologiaUniversidade de São PauloSao PauloBrazil
| | - Thaise Yumie Tomokane
- Laboratório de Patologia das Moléstias Infecciosas – LIM50, Departamento de PatologiaFaculdade de Medicina da Universidade de São PauloSão PauloBrazil
| | | | - Luciane Kanashiro‐Galo
- Faculdade de Medicina, Departamento de PatologiaUniversidade de São PauloSao PauloBrazil
| | | | | | - Carla Pagliari
- Faculdade de Medicina, Departamento de PatologiaUniversidade de São PauloSao PauloBrazil
- Instituto de Assistência Médica ao Servidor Público Estadual e Programa de pós‐graduação em Ciências da SaúdeSão PauloBrazil
| | - Mirian N. Sotto
- Faculdade de Medicina, Departamento de PatologiaUniversidade de São PauloSao PauloBrazil
| |
Collapse
|
3
|
Laurenti MD, Sosa-Ochoa W, Araujo Flores GV, Sandoval Pacheco CM, Tomokane TY, Oliveira LMDS, Zúniga C, Silveira FT, Corbett CEP. Evaluation of systemic immunity in atypical cutaneous leishmaniasis caused by Leishmania (L.) infantum chagasi. Parasite Immunol 2021; 44:e12896. [PMID: 34748659 DOI: 10.1111/pim.12896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/05/2021] [Accepted: 11/03/2021] [Indexed: 12/01/2022]
Abstract
In some central-American countries, Leishmania (L.) infantum chagasi infection can cause non-ulcerated or atypical cutaneous leishmaniasis (NUCL) in addition to the classic clinical form, visceral leishmaniasis (VL). Little is known about the host-parasite relationship that can contribute to the determination of one or another clinical form. The present study had the objective to evaluate the humoral and cellular immunity in the sera of individuals affected by NUCL to improve the comprehension of this atypical host-parasite interaction. Based on clinical and laboratory diagnosis, serum of 80 individuals was collected to evaluate the cytokines and immunoglobulins profile of NUCL (n = 47), VL patients (n = 5), and negative controls (n = 28). Cytokines were detected using Cytokine Bead Array (CBA) Human Th1/Th2/Th17 kit according to the manufacturer's instructions; class (IgG and IgM), and subclass of (IgG1 and IgG2) immunoglobulins was evaluated by ELISA using specific antigens. The concentration of TNF-α, IFN-γ, IL-2 and IL-4 cytokines in NUCL, VL and control was present below the detection threshold of CBA kit. IL-6, IL-10 and IL-17A cytokines was lower in NUCL compared to LV patients. Regarding to immunoglobulins, NUCL patients produced 4.0 times more IgG than the control, while VL patients produced 6.6 times more; and IgM level was 1.6 times higher in NUCL and 2.6 times in VL patients compared to the control. Concerning the immunoglobulins subclass, only VL patients showed positive reaction for IgG1, and IgG2 did not show positive reaction among the groups. The results showed a weak cellular and humoral systemic immune response in NUCL patients.
Collapse
Affiliation(s)
- Márcia Dalastra Laurenti
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Wilfredo Sosa-Ochoa
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.,Instituto de Investigaciones en Microbiología, Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
| | - Gabriela Venicia Araujo Flores
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Carmen Maria Sandoval Pacheco
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Thaise Yumie Tomokane
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Luanda Mara da Silva Oliveira
- Laboratório de Dermatologia e Imunodeficiências (LIM-56), Departamento de Dermatologia, Faculdade de Medicina e Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Concepción Zúniga
- Departamento de Vigilancia de la Salud, Hospital Escuela, Tegucigalpa, Honduras
| | - Fernando Tobias Silveira
- Laboratório de Parasitologia, Instituto Evandro Chagas (Ministério da Saúde), Belém, PA, Brasil.,Núcleo de Medicina Tropical, Universidade Federal do Pará, Belém, PA, Brasil
| | - Carlos Eduardo Pereira Corbett
- Laboratório de Patologia de Moléstias Infecciosas (LIM-50), Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| |
Collapse
|
4
|
Gonzalez K, Calzada JE, Tomokane TY, Pacheco CMS, Flores GVA, Castro Gomes CM, Pereira Corbett CE, Saldaña A, Laurenti MD. In situ study of cellular immune response in human cutaneous lesions caused by Leishmania (Viannia) panamensis in Panama. Parasite Immunol 2020; 43:e12801. [PMID: 33068443 DOI: 10.1111/pim.12801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 12/19/2022]
Abstract
AIMS Leishmaniasis is considered a disease with multiple clinical/immunopathological characteristics, depending on the immunity of the host and the species of the parasite. In Panama, the most prevalent species that causes localized cutaneous leishmaniasis (LCL) is Leishmania (Viannia) panamensis, and its immune response is poorly studied. Therefore, we evaluated by immunohistochemistry, the in situ immune response during this infection. METHODS AND RESULTS Biopsies from Panamanian patients with LCL were collected and processed by histological techniques. Infection by L. (V.) panamensis was demonstrated by isolation in culture and molecular characterization by Hsp70-RFLP. The in situ immune response was assessed by immunohistochemistry. The immune response was characterized by predominance of T cells, mainly CD8 cells that showed positive correlation with IFN-γ and Granzyme B. CD4 cells presented positive correlation with both IFN-γ and IL-13, pointed by mixed cellular immune response. Regulatory response was characterized by FoxP3 cells, which showed positive correlation to IL-10 but not with TGF-β. CONCLUSIONS L. (V.) panamensis infection triggers a mixed cellular immune response, characterized by the presence of pro-inflammatory, anti-inflammatory and regulatory elements in the skin lesion of Panamanian patients. These data contribute to a better understanding of the immunopathogenesis of Leishmania Viannia infection in Panama.
Collapse
Affiliation(s)
- Kadir Gonzalez
- Departamento de Parasitología Molecular, Instituto Conmemorativo Gorgas de Estudios de la Salud, Panama, Panamá.,Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - José Eduardo Calzada
- Departamento de Parasitología Molecular, Instituto Conmemorativo Gorgas de Estudios de la Salud, Panama, Panamá.,Facultad de Medicina Veterinaria, Universidad de Panamá, Panamá, Panamá
| | - Thaise Yumie Tomokane
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - Carmen Maria Sandoval Pacheco
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - Gabriela Venicia Araujo Flores
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - Cláudia Maria Castro Gomes
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - Carlos Eduardo Pereira Corbett
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| | - Azael Saldaña
- Departamento de Parasitología Molecular, Instituto Conmemorativo Gorgas de Estudios de la Salud, Panama, Panamá.,Centro de Investigación y Diagnóstico de Enfermedades Parasitarias, Facultad de Medicina, Universidad de Panamá, Panamá, Panamá
| | - Marcia Dalastra Laurenti
- Departamento de Patologia, Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
| |
Collapse
|
5
|
da Silva TBF, Silveira FT, Tomokane TY, Batista LFDS, Nunes JB, da Matta VLR, Passero LFD, Laurenti MD. Reactivity of purified and axenic amastigotes as a source of antigens to be used in serodiagnosis of canine visceral leishmaniasis. Parasitol Int 2020; 79:102177. [PMID: 32791320 DOI: 10.1016/j.parint.2020.102177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 06/10/2020] [Accepted: 07/24/2020] [Indexed: 11/27/2022]
Abstract
Although there is a great diversity of techniques and antigens used in the serodiagnosis of canine visceral leishmaniasis (CVL), total sensitivity and specificity have not yet been found. Since the use of amastigote forms in the indirect immunofluorescence assay has shown an improvement in the specificity of the test for the diagnosis of CVL, the performance of amastigotes forms of L. (L.) infantum chagasi as antigen source were evaluated in automatized ELISA test using crude antigen of axenic amastigote and purified amastigote from spleen of hamster chronically infected comparing with ELISA using total antigen produced with promastigote forms of L. (L.) infantum chagasi. One hundred and fifteen sera from dogs with positive parasitological diagnosis by PCR were used. The animals were classified into 2 groups: symptomatic (n = 67) and asymptomatic (n = 48) animals, in accordance with the clinical signs and laboratory tests were. As control, ninety-four sera from dogs with negative parasitological diagnosis were included. No significant difference was found in sensitivity, specificity, predictive values and accuracy between ELISA using whole antigens produced with both axenic and purified amastigotes in comparison with promastigotes forms. Correlation and concordance between the three total antigens tested in ELISA was observed. According to the similar performance among antigens, data pointed out to use antigen from promastigote forms for diagnosing canine leishmaniasis, especially due the easily in the production, lower cost and the abundance of correlative literature.
Collapse
Affiliation(s)
- Thais Bruna Ferreira da Silva
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Fernando Tobias Silveira
- Laboratório de Leishmanioses, Instituto Evandro Chagas, Belém, PA, Brazil; Núcleo de Medicina Tropical, Universidade Feral do Pará, Belém, PA, Brazil
| | - Thaise Yumie Tomokane
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Luis Fábio da Silva Batista
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Juliana Barbosa Nunes
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Vânia Lúcia Ribeiro da Matta
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | - Márcia Dalastra Laurenti
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| |
Collapse
|
6
|
Hirata KY, Oliveira Sobrinho EBD, Rigon L, Utsunomiya YT, Tomokane TY, Laurenti MD, Marcondes M. Exposure to Leishmania spp. infection and Lutzomyia spp. in individuals living in an area endemic for visceral leishmaniasis in Brazil. Rev Soc Bras Med Trop 2019; 53:e20190320. [PMID: 31859954 PMCID: PMC7083366 DOI: 10.1590/0037-8682-0320-2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 08/30/2019] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION: This study aimed to investigate human exposure to Leishmania
spp. infection and sandflies in an area endemic for the disease. METHODS: The presence of antibodies specific for Leishmania spp. and
saliva of Lutzomyia spp. and that of L.
infantum DNA in blood were evaluated. RESULTS: Antibodies against Leishmania spp. and sandfly saliva were
observed in 20.8% and 37.7% of individuals, respectively. DNA of
Leishmania spp. was amplified from the blood of one
patient. CONCLUSIONS: The results suggest that Leishmania spp. infection may be
underdiagnosed in this area.
Collapse
Affiliation(s)
- Karina Yukie Hirata
- Universidade Estadual Paulista, Faculdade de Medicina Veterinária de Araçatuba, Programa de Pós-Graduação em Ciência Animal, Araçatuba, SP, Brasil.,Universidade Estadual do Norte do Paraná, Faculdade de Medicina Veterinária, Centro de Ciências Agrárias, Bandeirantes, PR, Brasil
| | | | - Lais Rigon
- Universidade Estadual Paulista, Faculdade de Medicina Veterinária de Araçatuba, Programa de Pós-Graduação em Ciência Animal, Araçatuba, SP, Brasil
| | - Yuri Tani Utsunomiya
- Universidade Estadual Paulista, Faculdade de Medicina Veterinária de Araçatuba, Departamento de Apoio, Produção e Saúde Animal, Araçatuba, SP, Brasil
| | - Thaise Yumie Tomokane
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Patologia, São Paulo, SP, Brasil
| | - Márcia Dalastra Laurenti
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Patologia, São Paulo, SP, Brasil
| | - Mary Marcondes
- Universidade Estadual Paulista, Faculdade de Medicina Veterinária de Araçatuba, Departamento de Clínica, Cirurgia e Reprodução Animal, Araçatuba, SP, Brasil
| |
Collapse
|
7
|
Rossi CN, Tomokane TY, Batista LFDS, Marcondes M, Larsson CE, Laurenti MD. In situ CUTANEOUS CELLULAR IMMUNE RESPONSE IN DOGS NATURALLY AFFECTED BY VISCERAL LEISHMANIASIS. Rev Inst Med Trop Sao Paulo 2017; 58:48. [PMID: 27410908 PMCID: PMC4964317 DOI: 10.1590/s1678-9946201658048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/17/2015] [Indexed: 12/01/2022] Open
Abstract
Thirty-eight dogs naturally affected by visceral leishmaniasis were recruited in
Araçatuba, São Paulo State, Brazil - an endemic area for visceral
leishmaniasis. The animals were distributed into one of two groups, according to
their clinical and laboratory features, as either symptomatic or asymptomatic dogs.
Correlations between clinical features and inflammatory patterns, cellular immune
responses, and parasitism in the macroscopically uninjured skin of the ear were
investigated. Histological skin patterns were similar in both groups, and were
generally characterized by a mild to intense inflammatory infiltrate in the dermis,
mainly consisting of mononuclear cells. There was no difference in the number of
parasites in the skin (amastigotes/mm²) between the two groups. Concerning the
characterization of the cellular immune response, the number of positive inducible
nitric oxide synthase (iNOS+) cells was higher in the dermis of
symptomatic than in asymptomatic dogs (p = 0.0368). A positive
correlation between parasite density and macrophages density (p =
0.031), CD4+ T-cells (p = 0.015), and CD8+
T-cells (p = 0.023) was observed. Furthermore, a positive
correlation between density of iNOS+ cells and CD3+ T-cells
(p = 0.005), CD4+ T-cells (p =
0.001), and CD8+ T-cells (p = 0.0001) was also found. The
results showed the existence of a non-specific chronic inflammatory infiltrate in the
dermis of dogs affected by visceral leishmaniasis, characterized by the presence of
activated macrophages and T-lymphocytes, associated to cutaneous parasitism,
independent of clinical status.
Collapse
Affiliation(s)
- Claudio Nazaretian Rossi
- University of Sao Paulo, Department of Clinics, School of Veterinary Medicine and Animal Science. São Paulo, SP, Brazil
| | - Thaise Yumie Tomokane
- University of Sao Paulo, Department of Pathology (LIM-50), Medical School. São Paulo, SP, Brazil
| | - Luis Fábio da Silva Batista
- University of Sao Paulo, Department of Pathology, School of Veterinary Medicine and Animal Science. São Paulo, SP, Brazil
| | - Mary Marcondes
- Sao Paulo State University, Department of Animal Health and Production, School of Veterinary Medicine. Araçatuba, SP, Brazil
| | - Carlos Eduardo Larsson
- University of Sao Paulo, Department of Clinics, School of Veterinary Medicine and Animal Science. São Paulo, SP, Brazil
| | - Márcia Dalastra Laurenti
- University of Sao Paulo, Department of Pathology (LIM-50), Medical School. São Paulo, SP, Brazil
| |
Collapse
|
8
|
Batista LFDS, Matta VLRD, Tomokane TY, Pacheco AD, Silveira FT, Rossi CN, Marcondes M, Laurenti MD. Canine antibody response to Lutzomyia longipalpis saliva in endemic area of visceral leishmaniasis. Rev Soc Bras Med Trop 2017; 49:361-4. [PMID: 27384835 DOI: 10.1590/0037-8682-0360-2015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 02/29/2016] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Canine exposure to Lutzomyia longipalpis bites and the potential of Leishmania infantum transmissibility for the vector were evaluated. METHODS Immunoglobulin G (IgG) anti-Lu longipalpis saliva and -L. infantum, and blood parasite load were determined in dogs from endemic areas of visceral leishmaniasis. RESULTS Blood parasitism was similar between symptomatic and asymptomatic dogs. IgG anti-L. infantum was higher in symptomatic dogs, but IgG anti-Lu. longipalpis saliva was mostly observed in higher titers in asymptomatic dogs, indicating vector preference for feeding on asymptomatic dogs. CONCLUSIONS Our data suggest a pivotal role of asymptomatic dogs in L. infantum transmission in endemic areas.
Collapse
Affiliation(s)
- Luís Fábio da Silva Batista
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, São Paulo, Brasil.,Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Vânia Lúcia Ribeiro da Matta
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Thaise Yumie Tomokane
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Acácio Duarte Pacheco
- Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual de São Paulo, Araçatuba, São Paulo, Brasil
| | - Fernando Tobias Silveira
- Instituto Evandro Chagas, Ministério da Saúde, Ananindeua, Pará, Brasil.,Núcleo de Medicina Tropical, Universidade Federal do Pará, Belém, Pará, Brasil
| | | | - Mary Marcondes
- Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual de São Paulo, Araçatuba, São Paulo, Brasil
| | - Márcia Dalastra Laurenti
- Laboratório de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| |
Collapse
|
9
|
Pacheco AD, Laurenti MD, Lima VMFD, Tomokane TY, Marcondes M. Infecção por Leishmania sp. em cães de Florianópolis, Santa Catarina, Brasil. Braz J Vet Res Anim Sci 2013. [DOI: 10.11606/issn.1678-4456.v50i3p220-225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
10
|
Passero LFD, Tomokane TY, Corbett CEP, Laurenti MD, Toyama MH. Comparative studies of the anti-leishmanial activity of three Crotalus durissus ssp. venoms. Parasitol Res 2007; 101:1365-71. [PMID: 17659386 DOI: 10.1007/s00436-007-0653-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Revised: 06/20/2007] [Accepted: 06/25/2007] [Indexed: 10/23/2022]
Abstract
In this study, we compared the anti-leishmanial activity of three crotalic venoms (Crotalus durissus terrificus-Cdt, Crotalus durissus cascavella-Cdca, and Crotalus durissus collilineatus-Cdcol). Different concentrations of each venom incubated with Leishmania (Leishmania) amazonensis promastigotes were used. Cdt venom exhibited a higher anti-leishmanial activity (Inhibitory concentration-IC50-value of 4.70+/-1.72 microg/ml) in comparison with that of Cdca venom (IC50 value of 9.41+/-1.21 microg/ml), while Cdcol venom increased parasite numbers in 50% at a concentration of 44.30+/-2.18 microg/ml. In addition, this venom showed a low anti-leishmanial activity in higher concentrations (IC50 value of 281.00+/-9.50 microg/ml). The main fractions of Cdca venom were isolated and assayed under similar conditions used for assessing crude venom. The most active fractions were gyroxin and crotamine that had IC50 values of 3.80+/-0.52 microg/ml and 19.95+/-4.21 microg/ml, respectively. Convulxin also inhibited parasite growth rate, although this effect was not dose-dependent. Crotoxin was the least effective fraction with an IC50 value of 99.80+/-2.21 microg/ml. None of the protein fractions presented cytotoxic effects against J774 cells in culture. In vivo assays using BALB/c mice revealed that crotoxin and crotamine were the main toxic fractions. In conclusion, C. durissus cascavella venom has three main fractions with anti-leishmanial activity. These results open new possibilities to find proteins that might be used as possible agents against cutaneous leishmaniasis.
Collapse
Affiliation(s)
- L F D Passero
- Infectious Diseases Laboratory (LIM-50), Department of Pathology, University of São Paulo Medical School, São Paulo, Brazil.
| | | | | | | | | |
Collapse
|
11
|
Passero LFD, Castro AA, Tomokane TY, Kato MJ, Paulinetti TF, Corbett CEP, Laurenti MD. Anti-leishmania activity of semi-purified fraction of Jacaranda puberula leaves. Parasitol Res 2007; 101:677-80. [PMID: 17390147 DOI: 10.1007/s00436-007-0530-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Accepted: 03/14/2007] [Indexed: 10/23/2022]
Abstract
The crude methanolic extract from leaves of Jacaranda puberula showed activity against Leishmania (Leishmania) amazonensis. The extract presented active against promastigote forms with an inhibitory concentration 50% (IC(50)) value of 88.0 mug/ml, but only moderated activity against amastigote forms; however in higher concentrations the extract showed cytotoxic effects. The bio-guided chromatographic fractionation the crude methanolic extract against amastigotes yielded a fraction with an IC(50) value of 14.0 mug/ml (without cytotoxic activity) in relation to the crude extract (IC(50) value, 359.0 microg/ml). These data indicate that J. puberula leaves contain active compounds, which should be further investigated for the development of new potential drugs against cutaneous leishmaniasis.
Collapse
Affiliation(s)
- L F D Passero
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, Av. Dr. Arnaldo 455, Cerqueira César, São Paulo 0146-903, SP, Brazil.
| | | | | | | | | | | | | |
Collapse
|