Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/341596
Type: Artigo
Title: Spatial distribution of heterochromatin bodies in the nuclei of Triatoma infestans (Klug)
Author: Imperador, Carlos Henrique L.
Bardella, Vanessa B.
dos Anjos, Eli Heber M.
Rodrigues, Vera L.C.C.
Cabral-de-Mello, Diogo C.
Mello, Maria Luiza S.
Abstract: Constitutive heterochromatin typically exhibits low gene density and is commonly found adjacent or close to the nuclear periphery, in contrast to transcriptionally active genes concentrated in the innermost nuclear region. In Triatoma infestans cells, conspicuous constitutive heterochromatin forms deeply stained structures named chromocenters. However, to the best of our knowledge, no information exists regarding whether these chromocenters acquire a precise topology in the cell nuclei or whether their 18S rDNA, which is important for ribosome function, faces the nuclear center preferentially. In this work, the spatial distribution of fluorescent Feulgen-stained chromocenters and the distribution of their 18S rDNA was analyzed in Malpighian tubule cells of T. infestans using confocal microscopy. The chromocenters were shown to be spatially positioned relatively close to the nuclear periphery, though not adjacent to it. The variable distance between the chromocenters and the nuclear periphery suggests mobility of these bodies within the cell nuclei. The distribution of 18S rDNA at the edge of the chromocenters was not found to face the nuclear interior exclusively. Because the genome regions containing 18S rDNA in the chromocenters also face the nuclear periphery, the proximity of the chromocenters to this nuclear region is not assumed to be associated with overall gene silencing.
Subject: Microscopia confocal
Cromatina
Células - Núcleo
Hibridização in situ fluorescente
Heterocromatina
DNA ribossômico
Country: Reino Unido
Editor: Cambridge University Press
Rights: Aberto
Identifier DOI: 10.1017/S143192762000149X
Address: https://www.cambridge.org/core/journals/microscopy-and-microanalysis/article/spatial-distribution-of-heterochromatin-bodies-in-the-nuclei-of-triatoma-infestans-klug/C9BF3BB46B7F160D6F8634039B8DAEDC
Date Issue: 12-May-2020
Appears in Collections:IB - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
C9BF3BB46B7F160D6F8634039B8DAEDC.pdf (1).pdf2.19 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.