Cell death and tissue reorganization in Rhynchosciara americana (Sciaridae: Diptera) metamorphosis and their relation to molting hormone titers

Autor(es)

Brandao, Amanda dos Santos ^{[1, 2]} ; do Amaral, Jonatas Bussador ^[1] ; Rezende-Teixeira, Paula ^[1] ; Hartfelder, Klaus ^[3] ; Siviero, Fablo ^[1] ; Machado-Santelli, Glaucia Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biomed Sci, Dept Cell & Dev Biol, BR-05508000 Sao Paulo - Brazil

^[2] Postgrad Interunits Program Biotechnol, BR-05508900 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Cell & Mol Biol, BR-14049900 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ARTHROPOD STRUCTURE & DEVELOPMENT; v. 43, n. 5, p. 511-522, SEP 2014.
• Citações Web of Science: 8

Resumo

Programmed cell death (PCD) is a focal topic for understanding processes underlying metamorphosis in insects, especially so in holometabolous orders. During adult morphogenesis it allows for the elimination of larva-specific tissues and the reorganization of others for their functionalities in adult life. In Rhynchosciara, this PCD process could be classified as autophagic cell death, yet the expression of apoptosis-related genes and certain morphological aspects suggest that processes, autophagy and apoptosis may be involved. Aiming to reveal the morphological changes that salivary gland and fat body cells undergo during metamorphosis we conducted microscopy analyses to detect chromatin condensation and fragmentation, as well as alterations in the cytoplasm of late pupal tissues of Rhynchosciara americana. Transmission electron microscopy and confocal microscopy revealed cells in variable stages of death. By analyzing the morphological structure of the salivary gland we observed the presence of cells with autophagic vacuoles and apoptotic bodies and DNA fragmentation was confirmed with the TUNEL assay in salivary gland. The reorganization of fat body occurs with discrete detection of cell death by TUNEL assay. However, both salivary gland histolysis and fat body reorganization occur under control of the hormone ecdysone. Published by Elsevier Ltd. (AU)

• Processo FAPESP: 08/50036-3 - Aspectos celulares e moleculares das glândulas salivares de Rhynchosciara americana durante a metamorfose: e sua comparação com o corpo gorduroso
• Beneficiário: Amanda dos Santos Brandão
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto