Detail publikace

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

POBOŘILOVÁ, Z. OHLSSON, A. BERGLUND, T. VILDOVA, A. PROVAZNÍK, I. BABULA, P.

Originální název

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

Český název

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

Anglický název

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

Typ

článek v časopise

Jazyk

en

Originální abstrakt

Juglone, 5-hydroxy-1,4-naphthoquinone, is a naturally occurring plant secondary metabolite with allelopathic and cytotoxic properties. The cytotoxic effect of juglone and changes at the level of DNA methylation were investigated on a plant cell model, tobacco BY-2 cell suspension culture. We found that juglone in a concentration-dependent manner inhibits cell growth and causes creation of reactive oxygen species (ROS) that were visible mainly in nucleus, nucleolus, cytoplasm, and plasma membrane. Analysis of the changes in DNA methylation level using Luminometric Methylation Assay showed that juglone at the concentrations of 60 and 80 mu m causes hypomethylation of DNA. Decrease in DNA methylation was confirmed by the more sensitive technique, confocal immunofluorescence microscopy, already at 30 mu m, and was accompanied by significant overproduction of hydrogen peroxide, hydroxyl radicals, and superoxide anion radicals. The highest percentage of the signs of programed cell death, especially apoptic-like bodies that indicate DNA fragmentation was observed at 30 mu m of juglone. On the basis of results we suggest that overproduction of ROS is the main mechanism that causes hypomethylation of DNA, which may contribute to the initiation of the programmed cell death.

Český abstrakt

Juglone, 5-hydroxy-1,4-naphthoquinone, is a naturally occurring plant secondary metabolite with allelopathic and cytotoxic properties. The cytotoxic effect of juglone and changes at the level of DNA methylation were investigated on a plant cell model, tobacco BY-2 cell suspension culture. We found that juglone in a concentration-dependent manner inhibits cell growth and causes creation of reactive oxygen species (ROS) that were visible mainly in nucleus, nucleolus, cytoplasm, and plasma membrane. Analysis of the changes in DNA methylation level using Luminometric Methylation Assay showed that juglone at the concentrations of 60 and 80 mu m causes hypomethylation of DNA. Decrease in DNA methylation was confirmed by the more sensitive technique, confocal immunofluorescence microscopy, already at 30 mu m, and was accompanied by significant overproduction of hydrogen peroxide, hydroxyl radicals, and superoxide anion radicals. The highest percentage of the signs of programed cell death, especially apoptic-like bodies that indicate DNA fragmentation was observed at 30 mu m of juglone. On the basis of results we suggest that overproduction of ROS is the main mechanism that causes hypomethylation of DNA, which may contribute to the initiation of the programmed cell death.

Anglický abstrakt

Juglone, 5-hydroxy-1,4-naphthoquinone, is a naturally occurring plant secondary metabolite with allelopathic and cytotoxic properties. The cytotoxic effect of juglone and changes at the level of DNA methylation were investigated on a plant cell model, tobacco BY-2 cell suspension culture. We found that juglone in a concentration-dependent manner inhibits cell growth and causes creation of reactive oxygen species (ROS) that were visible mainly in nucleus, nucleolus, cytoplasm, and plasma membrane. Analysis of the changes in DNA methylation level using Luminometric Methylation Assay showed that juglone at the concentrations of 60 and 80 mu m causes hypomethylation of DNA. Decrease in DNA methylation was confirmed by the more sensitive technique, confocal immunofluorescence microscopy, already at 30 mu m, and was accompanied by significant overproduction of hydrogen peroxide, hydroxyl radicals, and superoxide anion radicals. The highest percentage of the signs of programed cell death, especially apoptic-like bodies that indicate DNA fragmentation was observed at 30 mu m of juglone. On the basis of results we suggest that overproduction of ROS is the main mechanism that causes hypomethylation of DNA, which may contribute to the initiation of the programmed cell death.

Klíčová slova

DNA methylation; Juglone; Naphthoquinone; Programmed cell death; Reactive oxygen species; Tobacco BY-2 cell suspension culture

Rok RIV

2015

Vydáno

01.05.2015

Strany od

28

Strany do

39

Strany počet

12

BibTex


@article{BUT114727,
  author="Zuzana {Pobořilová} and Anna B. {Ohlsson} and Torkel {Berglund} and Anna {Vildova} and Ivo {Provazník} and Petr {Babula}",
  title="DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells",
  annote="Juglone, 5-hydroxy-1,4-naphthoquinone, is a naturally occurring plant secondary metabolite with allelopathic and cytotoxic properties. The cytotoxic effect of juglone and changes at the level of DNA methylation were investigated on a plant cell model, tobacco BY-2 cell suspension culture. We found that juglone in a concentration-dependent manner inhibits cell growth and causes creation of reactive oxygen species (ROS) that were visible mainly in nucleus, nucleolus, cytoplasm, and plasma membrane. Analysis of the changes in DNA methylation level using Luminometric Methylation Assay showed that juglone at the concentrations of 60 and 80 mu m causes hypomethylation of DNA. Decrease in DNA methylation was confirmed by the more sensitive technique, confocal immunofluorescence microscopy, already at 30 mu m, and was accompanied by significant overproduction of hydrogen peroxide, hydroxyl radicals, and superoxide anion radicals. The highest percentage of the signs of programed cell death, especially apoptic-like bodies that indicate DNA fragmentation was observed at 30 mu m of juglone. On the basis of results we suggest that overproduction of ROS is the main mechanism that causes hypomethylation of DNA, which may contribute to the initiation of the programmed cell death.",
  chapter="114727",
  doi="10.1016/j.envexpbot.2015.01.005",
  howpublished="online",
  number="1",
  volume="113",
  year="2015",
  month="may",
  pages="28--39",
  type="journal article"
}