A simple and reproducible method to obtain large numbers of axenic amastigotes of different Leishmania species.

• Autor(a) principal: Teixeira, Márcia Cristina Aquino
• Data de Publicação: 2002
• Outros Autores: Santos, Regilene de Jesus, Sampaio, Romina Barreto, Pontes-de-Carvalho, Lain Carlos, dosSantos, Washington Luis Conrado
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da FIOCRUZ (ARCA)
• Texto Completo: https://www.arca.fiocruz.br/handle/icict/4212
• topic: Leishmania/crescimento & desenvolvimento; Parasitologia/métodos; Animais; Western Blotting; Cricetinae; Meios de Cultura; Humanos; Leishmania/patogenicidade; Leishmania/ultraestrutura; Leishmaniose/parasitologia; Leishmaniose/fisiopatologia; Camundongos Endogâmicos BALB C; Microscopia Eletrônica; Reprodutibilidade dos Testes

This work describes a simple method to yield large amounts of Leishmania amastigote-like forms in axenic cultures using promastigotes as the starting population. The method described induced extracellular amastigote transformation of Leishmania amazonensis (97%), Leishmania braziliensis (98%) and Leishmania chagasi (90%). The rounded parasites obtained in axenic cultures were morphologically similar, even at the ultrastructural level, to intracellular amastigotes. Moreover, the axenic amastigotes remained viable as measured by their ability to revert back to promastigotes and to infect BALB/c mice. L. amazonensis and L. braziliensis promastigotes and axenic amastigotes differed in terms of their Western blot profiles. A 46 kDa protein was recognized by specific antibodies only in axenic and lesion-derived L. amazonensis amastigotes and not in promastigotes.