Vaccine-Linked Chemotherapy Improves Benznidazole Efficacy for Acute Chagas Disease
| Autor: | Brian Keegan, Jeroen Pollet, Leroy Versteeg, Julio Vladimir Cruz-Chan, Peter J. Hotez, Maria Elena Bottazzi, Kathryn M. Jones, Fabian Gusovsky, Ashish Damania, April Kendricks |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Chagas disease Chagas Cardiomyopathy Protozoan Vaccines Trypanosoma cruzi 030231 tropical medicine Immunology Epitopes T-Lymphocyte Disease Biology CD8-Positive T-Lymphocytes Microbiology Parasite Load 03 medical and health sciences 0302 clinical medicine Immune system T-Lymphocyte Subsets medicine Humans Chagas Disease Nifurtimox Adverse effect Vaccination medicine.disease Immunohistochemistry Trypanocidal Agents 030104 developmental biology Infectious Diseases Tolerability Benznidazole Nitroimidazoles Acute Disease Microbial Immunity and Vaccines Cytokines Parasitology Female medicine.drug |
| Zdroj: | Infection and immunity. 86(4) |
| ISSN: | 1098-5522 |
| Popis: | Chagas disease affects 6 to 7 million people worldwide, resulting in significant disease burdens and health care costs in countries of endemicity. Chemotherapeutic treatment is restricted to two parasiticidal drugs, benznidazole and nifurtimox. Both drugs are highly effective during acute disease but are only minimally effective during chronic disease and fraught with significant adverse clinical effects. In experimental models, vaccines can be used to induce parasite-specific balanced T H 1/T H 2 immune responses that effectively reduce parasite burdens and associated inflammation while minimizing adverse effects. The objective of this study was to determine the feasibility of vaccine-linked chemotherapy for reducing the amount of benznidazole required to significantly reduce blood and tissue parasite burdens. In this study, we were able to achieve a 4-fold reduction in the amount of benznidazole required to significantly reduce blood and tissue parasite burdens by combining the low-dose benznidazole with a recombinant vaccine candidate, Tc24 C4, formulated with a synthetic Toll-like 4 receptor agonist, E6020, in a squalene oil-in-water emulsion. Additionally, vaccination induced a robust parasite-specific balanced T H 1/T H 2 immune response. We concluded that vaccine-linked chemotherapy is a feasible option for advancement to clinical use for improving the tolerability and efficacy of benznidazole. |
| Databáze: | OpenAIRE |
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