Stimulation of poly(ADP-ribose) synthetase activity in the lungs of mice exposed to a low level of ozone.
Stimulation of poly(ADP-ribose) synthetase activity in the lungs of mice exposed to a low level of ozone.
复制标题
刺激暴露于低水平臭氧的小鼠肺部的聚(ADP-核糖)合成酶活性。
DOI:
10.1016/0003-9861(85)90573-9
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发表时间:
1985
影响因子:
3.9
通讯作者:
Bhatnagar,RS
中科院分区:
文献类型:
--
作者:
Hussain,MZ;Mustafa,MG;Ghani,QP;Bhatnagar,RS
Toxic effects of O3are mediated through the formation of free radicals, which can cause DNA strand breaks. Cellular DNA repair is dependent upon the formation of poly(ADP-ribose) (polyADPR) catalyzed by polyADPR synthetase. In order to evaluate whether O3exposure inflicted DNA damage in lung tissue, we measured the activity of polyADPR synthetase (known to be activated in response to DNA damage) in mouse lungs after exposure to 0.45 ppm (882 μg/m3) O3for up to 7 days. The enzyme activity was stimulated with O3exposure relative to unexposed controls, showing a 20% (P< 0.05) increase at Day 5 and 42% (P< 0.001) at Day 7 of O3exposure. In addition, the activity of superoxide dismutase (SOD), known to be stimulated in response to production of superoxide anion (.O2−), was measured as an indicator of free radical involvement. Relative to unexposed controls, the SOD activity in exposed animal lungs increased to the peak level at Day 5 (48%,P< 0.001) and then declined at Day 7 of O3exposure but was still higher than controls (17%,P< 0.05). When animals, after 5 days of O3exposure, were allowed to recover in filtered room air, the activities of both enzymes declined to their respective control values in 6 days. These results suggest a possible temporal relationship between O3injury and the activities of polyADPR synthetase and a free radical scavenging enzyme, SOD. The stimulation of polyADPR synthetase activity with O3exposure, reflecting a response to lung cellular DNA repair, may be a sensitive indicator for assessing DNA damage in oxidant injury.
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DOI:
--
发表时间:
1978
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
Q. P. Ghani;M. Hollenberg
通讯作者:
M. Hollenberg
影响因子:
4.8
作者:
J. B. Stevens;A. P. Autor
通讯作者:
A. P. Autor
DOI:
--
发表时间:
1967
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
S. Hasegawa;S. Fujimura;Yoshiko Shimizu;T. Sugimura
通讯作者:
T. Sugimura
DOI:
10.3109/10408447709101341
发表时间:
1977
期刊:
CRC critical reviews in toxicology
影响因子:
--
作者:
H. Witschi;Michel G. C○té;Carroll E. Cross
通讯作者:
Carroll E. Cross
影响因子:
15.9
作者:
N. Berger;G. W. Sikorski;S. Petzold;Kevin K. Kurohara
通讯作者:
Kevin K. Kurohara