Biological evaluation of mimetic peptides as active molecules for a new and simple skin test in an animal model.
Parasitol Res
; 118(1): 317-324, 2019 Jan.
Article
em En
| MEDLINE
| ID: mdl-30397777
ABSTRACT
A skin test is a widely used tool in diagnostic evaluations to investigate cutaneous leishmaniases (CL). The actual antigen (Montenegro skin test [MST] antigen) presents some difficulties that pertain to its manufacturing and validation. To contribute to overcoming this problem, we propose the application of new-generation molecules that are based on skin antigen tests. These antigens were obtained through biotechnology pathways by manufacturing synthetic mimetic peptides. Three peptides, which were selected by phage display, were tested as skin test antigens in an animal model (Cavia porcellus) that was immunized with Leishmania amazonensis or Leishmania braziliensis. The peptide antigens, individually (PA1, PA2, PA3) or in a mix (PAMix), promoted induration reactions at 48 and 72 h after the test was performed. The indurations varied from 0.5 to 0.7 cm. In the animals immunized with L. amazonensis, the PA3 antigen showed better results than the standard MST antigen. In animals immunized with L. braziliensis, two peptide antigens (PA2 and PAMix) promoted induration reactions for a longer period of time than the standard MST antigen. These results validate our hypothesis that peptides could be used as antigens in skin tests and may replace the current antigen for CL diagnosis.
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Base de dados:
MEDLINE
Assunto principal:
Peptídeos
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Leishmania braziliensis
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Testes Cutâneos
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Leishmaniose Cutânea
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Antígenos de Protozoários
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article