Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/200408
Type: Artigo de periódico
Title: Contribution Of At-, Gc-, And Methylated Cytidine-rich Dna To Chromatin Composition In Malpighian Tubule Cell Nuclei Of Panstrongylus Megistus (hemiptera, Reduviidae).
Author: Alvarenga, Elenice M
Mondin, Mateus
Rodrigues, Vera L C C
Andrade, Larissa M
Vidal, Benedicto de Campos
Mello, Maria Luiza S
Abstract: The Malpighian tubule cell nuclei of male Panstrongylus megistus, a vector of Chagas disease, contain one chromocenter, which is composed solely of the Y chromosome. Considering that different chromosomes contribute to the composition of chromocenters in different triatomini species, the aim of this study was to determine the contribution of AT-, GC-, and methylated cytidine-rich DNA in the chromocenter as well as in euchromatin of Malpighian tubule cell nuclei of P. megistus in comparison with published data for Triatoma infestans. Staining with 4',6-diamidino-2-phenylindole/actinomycin D and chromomycin A(3)/distamycin, immunodetection of 5-methylcytidine and AgNOR test were used. The results revealed AT-rich/GC-poor DNA in the male chromocenter, but equally distributed AT and GC DNA sequences in male and female euchromatin, like in T. infestans. Accumulation of argyrophilic proteins encircling the chromocenter did not always correlate with that of GC-rich DNA. Methylated DNA identified by immunodetection was found sparsely distributed in the euchromatin of both sexes and at some points around the chromocenter edge, but it could not be considered responsible for chromatin condensation in the chromocenter, like in T. infestans. However, unlike in T. infestans, no correlation between the chromocenter AT-rich DNA and nucleolus organizing region (NOR) DNA was found in P. megistus.
Subject: At Rich Sequence
Animals
Cell Nucleus
Cells, Cultured
Chromatin
Cytidine
Dna Methylation
Epithelial Cells
Female
Gc Rich Sequence
Genes, Insect
Male
Malpighian Tubules
Mice
Nucleolus Organizer Region
Nymph
Panstrongylus
Rights: fechado
Identifier DOI: 10.1016/j.acthis.2011.12.001
Address: http://www.ncbi.nlm.nih.gov/pubmed/22197484
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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