Common Deletion (CD) in mitochondrial DNA of irradiated rat heart.

Autor: Siqueira RG; Laboratório de Ciências Radiológicas, Departamento de Biofísica, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil., Silva DA; Laboratório de Diagnósticos por DNA, Departamento de Biologia Geral, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil., Melo LD; Laboratório de Parasitologia Molecular, Departamento de Biofísica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil., Carvalho EF; Laboratório de Diagnósticos por DNA, Departamento de Biologia Geral, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil., Ferreira-Machado SC; Laboratório de Ciências Radiológicas, Departamento de Biofísica, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil., Almeida CE; Laboratório de Ciências Radiológicas, Departamento de Biofísica, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
Jazyk: angličtina
Zdroj: Anais da Academia Brasileira de Ciencias [An Acad Bras Cienc] 2014 Jun; Vol. 86 (2), pp. 685-694. Date of Electronic Publication: 2014 Apr 25.
DOI: 10.1590/0001-37652014110912
Abstrakt: The purpose of this study was to map the common deletion (CD) area in mtDNA and investigate the levels of this deletion in irradiated heart. The assays were developed in male Wistar rats that were irradiated with three different single doses (5, 10 or 15 Gy) delivered directly to the heart and the analyses were performed at various times post-irradiation (3, 15 or 120 days). The CDs area were sequenced and the CD quantified by real-time PCR. Our study demonstrated that the CD levels progressively decreased from the 3rd until the 15th day after irradiation, and then increased thereafter. Additionally, it was observed that the levels of CD are modulated differently according to the different categories of doses (moderate and high). This study demonstrated an immediate response to ionizing radiation, measured by the presence of mutations in the CD area and a decrease in the CD levels.
Databáze: MEDLINE