Rafaelle de Paula Freire, Francisco Rafael Marciano Fonseca, Naya Lúcia Rodrigues de Castro, Carrel Xavier Martins Lima, Raquel Peralva Ribeiro-Romão, Diane Isabelle Magno Cavalcante, Clarissa Romero Teixeira, Regis Gomes, Alda Maria Da-Cruz, Maria Jania Teixeira
{"title":"不同接种浓度的巴西利什曼原虫影响皮肤利什曼病耳真皮仓鼠模型的免疫发病机制和临床演变。","authors":"Rafaelle de Paula Freire, Francisco Rafael Marciano Fonseca, Naya Lúcia Rodrigues de Castro, Carrel Xavier Martins Lima, Raquel Peralva Ribeiro-Romão, Diane Isabelle Magno Cavalcante, Clarissa Romero Teixeira, Regis Gomes, Alda Maria Da-Cruz, Maria Jania Teixeira","doi":"10.1111/pim.12947","DOIUrl":null,"url":null,"abstract":"<p><p>The golden hamster (Mesocricetus auratus) is commonly used as a promising model for Leishmania braziliensis infection developing skin-ulcerated lesions. However, different protocols using high concentration of parasites inoculated in the footpad result in severe clinical disease. Here, we further investigate the outcome of the site of infection and concentration of L. braziliensis parasites inoculated on the immunopathogenesis and clinical evolution. Initially, hamsters were infected in the ear dermis or hind footpad with a concentration of 1 × 10<sup>5</sup> parasites. Animals infected in the ear dermis developed a disease, with an increased parasite load that more closely resembled human cutaneous leishmaniasis lesions comparing to the group infected in the footpad. Next, we evaluated if different parasite concentrations (10<sup>4</sup> , 10<sup>5</sup> and 10<sup>6</sup> ) inoculated in the ear dermis would impact the course and clinical aspects of infection. Hamsters infected with 10<sup>4</sup> and 10<sup>5</sup> parasites developed mild lesions compared to the group infected with 10<sup>6</sup> that presented severe and persistent lesions. The parasite load varied between the different parasite concentrations. The inflammatory response was more intense when infection was initiated with 10<sup>6</sup> parasites accompanied by an increased initial expression of IL-4, IL-10 and arginase in the lymph node followed by expression of both pro-and anti-inflammatory cytokines comparing to groups infected with 10<sup>4</sup> and 10<sup>5</sup> parasites. In conclusion, the number of parasites inoculated, and the initial site of infection could influence the inflammatory response, and clinical presentation. Our results suggest that the ear dermis infection model induces a chronic disease that relates to immunopathological aspects of CL natural infection.</p>","PeriodicalId":19931,"journal":{"name":"Parasite Immunology","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Different inoculum of Leishmania braziliensis concentrations influence immunopathogenesis and clinical evolution in the ear dermis hamster model of cutaneous leishmaniasis.\",\"authors\":\"Rafaelle de Paula Freire, Francisco Rafael Marciano Fonseca, Naya Lúcia Rodrigues de Castro, Carrel Xavier Martins Lima, Raquel Peralva Ribeiro-Romão, Diane Isabelle Magno Cavalcante, Clarissa Romero Teixeira, Regis Gomes, Alda Maria Da-Cruz, Maria Jania Teixeira\",\"doi\":\"10.1111/pim.12947\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The golden hamster (Mesocricetus auratus) is commonly used as a promising model for Leishmania braziliensis infection developing skin-ulcerated lesions. However, different protocols using high concentration of parasites inoculated in the footpad result in severe clinical disease. Here, we further investigate the outcome of the site of infection and concentration of L. braziliensis parasites inoculated on the immunopathogenesis and clinical evolution. Initially, hamsters were infected in the ear dermis or hind footpad with a concentration of 1 × 10<sup>5</sup> parasites. Animals infected in the ear dermis developed a disease, with an increased parasite load that more closely resembled human cutaneous leishmaniasis lesions comparing to the group infected in the footpad. Next, we evaluated if different parasite concentrations (10<sup>4</sup> , 10<sup>5</sup> and 10<sup>6</sup> ) inoculated in the ear dermis would impact the course and clinical aspects of infection. Hamsters infected with 10<sup>4</sup> and 10<sup>5</sup> parasites developed mild lesions compared to the group infected with 10<sup>6</sup> that presented severe and persistent lesions. The parasite load varied between the different parasite concentrations. The inflammatory response was more intense when infection was initiated with 10<sup>6</sup> parasites accompanied by an increased initial expression of IL-4, IL-10 and arginase in the lymph node followed by expression of both pro-and anti-inflammatory cytokines comparing to groups infected with 10<sup>4</sup> and 10<sup>5</sup> parasites. In conclusion, the number of parasites inoculated, and the initial site of infection could influence the inflammatory response, and clinical presentation. Our results suggest that the ear dermis infection model induces a chronic disease that relates to immunopathological aspects of CL natural infection.</p>\",\"PeriodicalId\":19931,\"journal\":{\"name\":\"Parasite Immunology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2022-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Parasite Immunology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1111/pim.12947\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2022/9/23 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q4\",\"JCRName\":\"IMMUNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Parasite Immunology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1111/pim.12947","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/9/23 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"IMMUNOLOGY","Score":null,"Total":0}
Different inoculum of Leishmania braziliensis concentrations influence immunopathogenesis and clinical evolution in the ear dermis hamster model of cutaneous leishmaniasis.
The golden hamster (Mesocricetus auratus) is commonly used as a promising model for Leishmania braziliensis infection developing skin-ulcerated lesions. However, different protocols using high concentration of parasites inoculated in the footpad result in severe clinical disease. Here, we further investigate the outcome of the site of infection and concentration of L. braziliensis parasites inoculated on the immunopathogenesis and clinical evolution. Initially, hamsters were infected in the ear dermis or hind footpad with a concentration of 1 × 105 parasites. Animals infected in the ear dermis developed a disease, with an increased parasite load that more closely resembled human cutaneous leishmaniasis lesions comparing to the group infected in the footpad. Next, we evaluated if different parasite concentrations (104 , 105 and 106 ) inoculated in the ear dermis would impact the course and clinical aspects of infection. Hamsters infected with 104 and 105 parasites developed mild lesions compared to the group infected with 106 that presented severe and persistent lesions. The parasite load varied between the different parasite concentrations. The inflammatory response was more intense when infection was initiated with 106 parasites accompanied by an increased initial expression of IL-4, IL-10 and arginase in the lymph node followed by expression of both pro-and anti-inflammatory cytokines comparing to groups infected with 104 and 105 parasites. In conclusion, the number of parasites inoculated, and the initial site of infection could influence the inflammatory response, and clinical presentation. Our results suggest that the ear dermis infection model induces a chronic disease that relates to immunopathological aspects of CL natural infection.
期刊介绍:
Parasite Immunology is an international journal devoted to research on all aspects of parasite immunology in human and animal hosts. Emphasis has been placed on how hosts control parasites, and the immunopathological reactions which take place in the course of parasitic infections. The Journal welcomes original work on all parasites, particularly human parasitology, helminths, protozoa and ectoparasites.