Borrelia burgdorferi membranes are the primary targets of reactive oxygen species.
Borrelia burgdorferi membranes are the primary targets of reactive oxygen species.
复制标题
DOI:
10.1111/j.1365-2958.2008.06204.x
复制
发表时间:
2008-05
影响因子:
3.6
通讯作者:
Gherardini FC
中科院分区:
文献类型:
--
作者:
Boylan JA;Lawrence KA;Downey JS;Gherardini FC
Spirochetes living in an oxygen-rich environment or when challenged by host immune cells are exposed to reactive oxygen species (ROS). These species can harm/destroy cysteinyl residues, iron-sulphur clusters, DNA and polyunsaturated lipids, leading to inhibition of growth or cell death. Because Borrelia burgdorferi contains no intracellular iron, DNA is most likely not a major target for ROS via Fenton reaction. In support of this, growth of B. burgdorferi in the presence of 5 mM H2O2 had no effect on the DNA mutation rate (spontaneous coumermycin A1 resistance), and cells treated with 10 mM t-butyl hydroperoxide or 10 mM H2O2 show no increase in DNA damage. Unlike most bacteria, B. burgdorferi incorporates ROS-susceptible polyunsaturated fatty acids from the environment into their membranes. Analysis of lipoxidase-treated B. burgdorferi cells by Electron Microscopy showed significant irregularities indicative of membrane damage. Fatty acid analysis of cells treated with lipoxidase indicated that host-derived linoleic acid had been dramatically reduced (50-fold) in these cells, with a corresponding increase in the levels of malondialdehyde by-product (fourfold). These data suggest that B. burgdorferi membrane lipids are targets for attack by ROS encountered in the various stages of the infective cycle.
登录
查看更多内容
影响因子:
3.2
作者:
HINNEBUSCH, J;BARBOUR, AG
通讯作者:
BARBOUR, AG
影响因子:
3.2
作者:
STORZ, G;JACOBSON, FS;AMES, BN
通讯作者:
AMES, BN
影响因子:
3.5
作者:
Okimoto, Y;Watanabe, A;Noguchi, N
通讯作者:
Noguchi, N
影响因子:
13.8
作者:
GUTTERIDGE, JMC;HALLIWELL, B
通讯作者:
HALLIWELL, B
影响因子:
2.9
作者:
LINDAHL, T;NYBERG, B
通讯作者:
NYBERG, B