Use este identificador para citar ou linkar para este item:
https://www.arca.fiocruz.br/handle/icict/59612
Tipo de documento
ArtigoDireito Autoral
Acesso restrito
Data de embargo
2099-12-31
Coleções
Metadata
Mostrar registro completo
THE LARVAL MIDGUT OF ANOPHELES, AEDES, AND TOXORHYNCHITES MOSQUITOES (DIPTERA, CULICIDAE): A COMPARATIVE APPROACH IN MORPHOPHYSIOLOGY AND EVOLUTION
Histology
Histochemistry
Gastric caecum
Enterocytes
Enteroendocrine cells
Autor(es)
Afiliação
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil/Fundação Oswaldo Cruz. Instituto René Rachou. Belo Horizonte, MG, Brazil
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
The W. Harry Feinstone Department of Molecular Microbiology and Immunology. Johns Hopkins Malaria Research Institute. Bloomberg School of Public Health. Johns Hopkins University. Baltimore, MD, USA
Fundação Oswaldo Cruz. Instituto René Rachou. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Instituto René Rachou. Belo Horizonte, MG, Brazil
The W. Harry Feinstone Department of Molecular Microbiology and Immunology. Johns Hopkins Malaria Research Institute. Bloomberg School of Public Health. Johns Hopkins University. Baltimore, MD, USA
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
The W. Harry Feinstone Department of Molecular Microbiology and Immunology. Johns Hopkins Malaria Research Institute. Bloomberg School of Public Health. Johns Hopkins University. Baltimore, MD, USA
Fundação Oswaldo Cruz. Instituto René Rachou. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Instituto René Rachou. Belo Horizonte, MG, Brazil
The W. Harry Feinstone Department of Molecular Microbiology and Immunology. Johns Hopkins Malaria Research Institute. Bloomberg School of Public Health. Johns Hopkins University. Baltimore, MD, USA
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
Resumo em Inglês
The mosquito larval midgut is responsible for acquiring and storing most of the nutrients that will sustain the events of metamorphosis and the insect’s adult life. Despite its importance, the basic biology of this larval organ is poorly understood. To help fll this gap, we carried out a comparative morphophysiological investigation of three larval midgut regions (gastric caeca, anterior midgut, and posterior midgut) of phylogenetically distant mosquitoes: Anopheles gambiae (Anopheles albimanus was occasionally used as an alternate), Aedes aegypti, and Toxorhynchites theobaldi. Larvae of Toxorhynchites mosquitoes are predacious, in contrast to the other two species, that are detritivorous. In this work, we show that the larval gut of the three species shares basic histological characteristics, but difer in other aspects. The lipid and carbohydrate metabolism of the An. gambiae larval midgut is diferent compared with that of Ae. aegypti and Tx. theobaldi. The gastric caecum is the most variable region, with diferences probably related to the chemical composition of the diet. The peritrophic matrix is morphologically similar in the three species, and processes involved in the post-embryonic development of the organ, such as cell diferentiation and proliferation, were also similar. FMRF-positive enteroendocrine cells are grouped in the posterior midgut of Tx. theobaldi, but individualized in An. gambiae and Ae. aegypti. We hypothesize that Tx. theobaldi larval predation is an ancestral condition in mosquito evolution
Palavras-chave em inglês
Digestive tractHistology
Histochemistry
Gastric caecum
Enterocytes
Enteroendocrine cells
Compartilhar