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Segura GBR, Ochoa WHS, da Matta VLR, Martínez M, Tercero CR, Gonzalez RR, Pacheco CMS, Flores GVA, Silveira FT, Henriquez MMR, Laurenti MD. Can domestic dogs be considered a good reservoir of Leishmania (L.) infantum chagasi in an endemic area of nonulcerated cutaneous leishmaniasis in Southern Honduras? Rev Inst Med Trop Sao Paulo 2023; 65:e24. [PMID: 36995877 PMCID: PMC10041965 DOI: 10.1590/s1678-9946202365024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 02/03/2023] [Indexed: 03/30/2023] Open
Abstract
Dogs are considered to be the main domestic reservoir associated with the transmission of Leishmania (L.) infantum chagasi to humans in endemic areas of visceral leishmaniasis in America. However, little is known about the role of canines as a source of infection in endemic areas of nonulcerated cutaneous leishmaniasis (NUCL). Therefore, the objective of the present study was to investigate the role of dogs as a possible reservoir of the parasite in Southern Honduras. Dogs (n = 107) living with individuals affected by NUCL were clinically examined and biological material was collected for parasitological and immunological diagnosis. Most animals showed a healthy appearance and a few presented slight weight loss (64%), alopecia (7%), onychogryphosis (5%) and skin lesions (1%). The overall seroprevalence of Leishmania infection based on the DDP ® quick test and/or in-house ELISA serological test was 41%. The presence of the parasite’s DNA was confirmed in 94% of the dogs; however, the average parasite load in the buffy coat was low at 6.09 parasites/µL, ranging between 0.221 and 50.2. The skin of seropositive dogs examined by histopathology using paraffin sections stained by hematoxylin and immunohistochemistry did not show cutaneous lesions or parasite amastigotes. Based on the absence of parasites in the skin and the low parasite load detected in the buffy coat, it seems that the dog does not represent a good source of infection for the vector in the endemic area of NUCL transmission in Southern Honduras. Other domestic and/or wild animals should be investigated.
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Affiliation(s)
- Gabriela Beatriz Rodriguez Segura
- Universidad Nacional Autónoma de Honduras , Instituto de Investigaciones en Microbiologia , Tegucigalpa , Honduras
- Universidad Nacional Autónoma de Honduras , Posgrado en Salud Pública , Tegucigalpa , Honduras
| | - Wilfredo Humberto Sosa Ochoa
- Universidad Nacional Autónoma de Honduras , Instituto de Investigaciones en Microbiologia , Tegucigalpa , Honduras
| | - Vânia Lúcia Ribeiro da Matta
- Universidade de São Paulo , Faculdade de Medicina , Hospital das Clínicas , Laboratório de Investigação Médica (LIM-50), São Paulo , São Paulo , Brazil
| | - Mercedes Martínez
- Universidad Nacional Autónoma de Honduras , Posgrado en Salud Pública , Tegucigalpa , Honduras
| | - Carol Rodriguez Tercero
- Universidad Nacional Autónoma de Honduras , Instituto de Investigaciones en Microbiologia , Tegucigalpa , Honduras
| | - Raquel Romero Gonzalez
- Universidad Nacional Autónoma de Honduras , Instituto de Investigaciones en Microbiologia , Tegucigalpa , Honduras
| | - Carmen M. Sandoval Pacheco
- Universidade de São Paulo , Faculdade de Medicina , Laboratório de Patologia de Moléstias Infecciosas , São Paulo , São Paulo , Brazil
| | - Gabriela V. Araujo Flores
- Universidade de São Paulo , Faculdade de Medicina , Laboratório de Patologia de Moléstias Infecciosas , São Paulo , São Paulo , Brazil
| | - Fernando Tobias Silveira
- Instituto Evandro Chagas , Laboratório de Leishmanioses , Belém , Pará , Brazil
- Universidade Federal do Pará , Núcleo de Medicina Tropical , Belém , Pará , Brazil
| | | | - Márcia Dalastra Laurenti
- Universidade de São Paulo , Faculdade de Medicina , Laboratório de Patologia de Moléstias Infecciosas , São Paulo , São Paulo , Brazil
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Kim CJ, Park SC, Lee SH, Lim YJ, Yoon M, Park JG, Baek YB, Cho KO, Hong JW, Shin DJ, Kim SK. Safety analysis of ex vivo-expanded canine natural killer cells in a xenogeneic mouse model of graft-versus-host disease. J Leukoc Biol 2021; 111:439-450. [PMID: 33884654 DOI: 10.1002/jlb.5a1019-501rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Canine natural killer (NK) cells are large, granular lymphocytes that are neither B lymphocytes nor T lymphocytes. However, it has been reported that canine NK cells share some of the phenotypic characteristics of T lymphocytes, such as CD3 and CD5. Studies are needed to assess the safety of canine NK cells for immunotherapy, especially because the safety of using allogeneic NK cells as an immunotherapy for dogs has yet to be shown. In this study, the safety of cultured canine NK cells was assessed using a xenogeneic mouse model of graft-versus-host disease (GVHD). Mice were injected with either canine peripheral blood mononuclear cells (PBMCs) or cultured NK cells for 2 or 3 weeks. Data were then collected on changes in mice body weights, disease severity scores, and survival rates. Histopathological and immunohistochemical evaluations were also performed. All mice injected with canine PBMCs died within 45 days after injection. Severe clinical signs were caused by GVHD. The histopathological and immunohistochemical evaluations showed that mice injected with canine PBMCs had multiple lesions, including necrosis in their lungs, livers, kidneys, and stomachs, and the injected cells were present around the lesions. By contrast, no mice injected with cultured NK cells without removing the CD3+ TCR- cells exhibited any clinical abnormalities. Moreover, they all survived the 90-day experimental period without exhibiting any histopathological changes. Accordingly, the results of this study suggest that canine NK cells do not cause significant side effects such as GVHD and allogeneic NK cells can safely be used for cancer immunotherapy in dogs.
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Affiliation(s)
- Cheol-Jung Kim
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
| | - Se-Cheol Park
- Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, Chungnam, Republic of Korea.,Korea Testing & Research Institute, Hwasun, Jeollanamdo, Republic of Korea
| | - Soo-Hyeon Lee
- Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
| | - Yu-Jin Lim
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
| | - Meesun Yoon
- Department of Radiation Oncology, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jun-Gyu Park
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Yeong-Bin Baek
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Kyoung-Oh Cho
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Jeong Won Hong
- Research Institute for Natural Products, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
| | - Dong-Jun Shin
- Research Institute for Natural Products, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
| | - Sang-Ki Kim
- Department of Laboratory and Companion Animal Science, College of Industrial Science, Kongju National University, Yesan-gun, Chungnam, Republic of Korea.,Department of Integrated Life Science and Technology, Kongju National University, Yesan-gun, Chungnam, Republic of Korea.,Research Institute for Natural Products, Kongju National University, Yesan-gun, Chungnam, Republic of Korea
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Moura CRLDP, Costa CHN, Moura RDD, Braga ARF, Silva VC, Costa DL. Cutaneous parasitism in patients with American visceral leishmaniasis in an endemic area. Rev Soc Bras Med Trop 2020; 53:e20190446. [PMID: 32130324 PMCID: PMC7094057 DOI: 10.1590/0037-8682-0446-2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/20/2020] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION: Visceral leishmaniasis (VL) represents a public health concern in several
areas of the world. In the American continent, VL transmission is typically
zoonotic, but humans with active VL caused by Leishmania
infantum are able to infect sandflies. Thus, individuals with
cutaneous parasitic infections may act as reservoirs and allow interhuman
transmission. Additionally, the skin may be responsible for reactivation of
the disease after therapy. This study’s objective was to evaluate cutaneous
parasitism in humans with VL in an American endemic area. METHODS: A cross-sectional hospital-based study was conducted in northeast Brazil
from October 2016 to April 2017. Biopsies of healthy skin for histopathology
and immunohistochemistry were performed prior to treatment in all study
patients. RESULTS: Twenty-two patients between the ages of five months to 78 years were
included in the study. Seven patients (31.8%) tested positive for HIV. Only
one patient had cutaneous parasitism, as confirmed by immunohistochemistry
prior to treatment. Parasitism was not detected after treatment. CONCLUSIONS: Cutaneous parasitism in the healthy skin of humans with visceral
leishmaniasis, although unusual, may be a source of infection for
phlebotomine sandflies.
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Affiliation(s)
| | | | - Rafael de Deus Moura
- Universidade Federal do Piauí, Departamento de Medicina Especializada, Teresina, PI, Brasil.,Universidade Federal do Piauí, Hospital Universitário, Laboratório de Anatomia Patológica, Teresina, PI, Brasil
| | - Aline Reis Ferro Braga
- Universidade Federal do Piauí, Hospital Universitário, Laboratório de Anatomia Patológica, Teresina, PI, Brasil
| | | | - Dorcas Lamounier Costa
- Universidade Federal do Piauí, Instituto de Doenças Tropicais Nathan Portella, Teresina, PI, Brasil
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Gonçalves AAM, Leite JC, Resende LA, Mariano RMDS, Silveira P, Melo-Júnior OADO, Ribeiro HS, de Oliveira DS, Soares DF, Santos TAP, Marques AF, Galdino AS, Martins-Filho OA, Dutra WO, da Silveira-Lemos D, Giunchetti RC. An Overview of Immunotherapeutic Approaches Against Canine Visceral Leishmaniasis: What Has Been Tested on Dogs and a New Perspective on Improving Treatment Efficacy. Front Cell Infect Microbiol 2019; 9:427. [PMID: 31921703 PMCID: PMC6930146 DOI: 10.3389/fcimb.2019.00427] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 11/29/2019] [Indexed: 12/14/2022] Open
Abstract
Visceral leishmaniasis (VL), caused by digenetic protozoa of the genus Leishmania, is the most severe form of leishmaniasis. Leishmania infantum is one of the species responsible for VL and the disease caused is considered a zoonosis whose main reservoir is the dog. Canine visceral leishmaniasis (CVL) can lead to the death of the animal if left untreated. Furthermore, the available pharmocologial treatment for CVL presents numerous disadvantages, such as relapses, toxicity, drug resistance, and the fact treated animals continue to be reservoirs when treatment fails to achieve parasitological cure. Moreover, the available VL control methods have not been adequate when it comes to controlling parasite transmission. Advances in immune response knowledge in recent years have led to a better understanding of VL pathogenesis, allowing new treatments to be developed based on immune system activation, often referred to as immunotherapy. In fact, well-defined protocols have been described, ranging from the use of immunomodulators to the use of vaccines. This treatment, which can also be associated with chemotherapy, has been shown to be effective in restoring or inducing an adequate immune response to reduce parasitic burden, leading to clinical improvement. This review focuses on immunotherapy directed at dogs infected by L. infantum, including a literature review of what has already been done in dogs. We also introduce a promising strategy to improve the efficacy of immunotherapy.
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Affiliation(s)
- Ana Alice Maia Gonçalves
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Jaqueline Costa Leite
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Lucilene Aparecida Resende
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Reysla Maria da Silveira Mariano
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Patricia Silveira
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Otoni Alves de Oliveira Melo-Júnior
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Helen Silva Ribeiro
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Diana Souza de Oliveira
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Diogo Fonseca Soares
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Thaiza Aline Pereira Santos
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Alexandre Ferreira Marques
- Laboratory of Immuno-Proteome and Parasite Biology, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Olindo Assis Martins-Filho
- Laboratory of Diagnostic and Monitoring Biomarkers, René Rachou Institute, FIOCRUZ-Minas, Belo Horizonte, Brazil
| | - Walderez Ornelas Dutra
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Denise da Silveira-Lemos
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Rodolfo Cordeiro Giunchetti
- Laboratory of Biology of Cell Interactions, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Tumor-infiltrating CD4 + and CD8 + lymphocytes and macrophages are associated with prognostic factors in triple-negative canine mammary complex type carcinoma. Res Vet Sci 2019; 126:29-36. [PMID: 31425936 DOI: 10.1016/j.rvsc.2019.08.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 08/06/2019] [Accepted: 08/12/2019] [Indexed: 02/06/2023]
Abstract
This study aimed to evaluate the association of CD3+, CD4+, and CD8+ T cells and tumor-infiltrating macrophages (TIMs) with the clinical parameters of female dogs harboring mammary gland tumors. Thirty female dogs affected with mammary carcinomas were used, and all tumors were histologically classified as complex carcinoma and were triple-negative phenotype determined by immunohistochemistry. Freshly frozen sections were used to determine CD3+, CD4+ and CD8+ T cells by immunohistochemistry, and TIMs were determined by immunofluorescence assays. Ten out of the 30 dogs showed lymph node metastasis at diagnosis. Fifteen dogs had a tumor of grade I (15/30), nine (9/30) had a tumor of grade II and six (6/30) had a tumor of grade III. The mean overall survival was 680.5 days (± 200.4). Dogs with sentinel lymph node positivity (10/30) (P = .0035) and dogs that developed metastasis (P = .0001) showed a shorter survival time. In addition, dogs with a high level of inflammatory infiltrate in tumor tissues presented a shorter survival time (P = .0001) than that of other dogs. Dogs with tumors containing higher numbers of CD3+ T cells (P = .001), CD4+ T cells (P = .001), or TIM cells (P < .0001) showed a shorter survival time than that of other dogs. Our results suggested that characteristics of immune cell infiltrates, including CD3+ T cells, CD4+ T cells, and TIMs, can be used as potential prognostic indicators for predicting clinical outcomes in dogs with mammary gland tumors, particularly tumors with a complex histological subtype and triple-negative phenotype.
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