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Ultrastructural and enzymatic alterations in the ovary of rhodnius prolixus infected with Trypanosoma rangeli

Asian Pacific Journal of Tropical Medicine 2022年第2期15卷 71-78页

作者： Guilherme S.Machado rosane L.Lopes Simone S.C.Oliveira Simone P.C.Freitas jacenir r.santos-mallet AndréL.S.santos Denise Feder Suzete A.O.Gomes Programa de Pós-Graduação em Ciências e Biotecnologia Instituto de BiologiaUniversidade Federal FluminenseNiteróiRJBrazil Laboratório de Biodiversidade de Insetos e Patógenos Departamento de Biologia GeralInstituto de BiologiaUniversidade Federal FluminenseNiteróiRJBrazil Laboratório de Estudos Avançados de Microrganismos Emergentes e resistentes Departamento de Microbiologia GeralInstituto de Microbiologia Paulo de GóesUniversidade Federal do Rio de JaneiroRJBrazil Fundação Oswaldo Cruz Piauí TeresinaPIBrazil Laboratório Interdisciplinar de Vigilância Entomológica em Díptera e Hemíptera Instituto Oswaldo CruzFundação Oswaldo CruzRio de JaneiroRJBrazil Universidade Iguaçu Nova IguaçuRJBrazil Laboratório de Biologia de Insetos Departamento de Biologia GeralInstituto de BiologiaUniversidade Federal FluminenseNiteróiRJBrazil

Objective:To investigate the morphological structure of ovarian follicular cells and biochemical parameters of both ovaries and fat bodies(sites of vitellogenesis)from rhodnius(r.)prolixus infected with Trypanosoma(T.)***:Adult virgin females of *** were fed upon a membrane apparatus containing heat-inactivated citrated rabbit blood and a suspension of *** epimastigotes(Macias strain).Females from the control group and all the males received parasite-free *** electron microscopy was used to reveal the morphological aspects of ovarian follicle cells in both control and parasite-infected *** profile,proteolytic activities and Western blotting analyses were performed in either ovary or fat body samples of control and parasite-infected ***:According to the ultrastructural data,*** infection elicited a degeneration process in the ovarian follicular cells of *** assays indicated a reduction in the activity of aspartic peptidases in the ovary and fat body from parasite-infected group,while a significant increase in the cysteine peptidase activity was measured in both insect ***,immunoblotting revealed that vitellogenin was overexpressed in the ovary of parasite-infected ***:*** infection seems to elicit an early programmed cell death in the ovarian follicle cells as well as induces the modulation on the activities of different peptidase classes in either ovaries or fat bodies and the overexpression of the vitellogenin in the ovary of ***.

关键词： Trypanosoma rangeli rhodnius prolixus Ovarian follicle Vitellogenin Aspartic protease Cysteine protease

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