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Cells from individuals with SOD-1 associated familial amyotrophic lateral sclerosis do not have an increased susceptibility to radiation-induced free radical production or DNA damage.

Mithal, Natasha P. and Radunovic, Aleksandar and Figlewicz, Denise A. and Leigh, P. Nigel and McMillan, Trevor J. (1999) Cells from individuals with SOD-1 associated familial amyotrophic lateral sclerosis do not have an increased susceptibility to radiation-induced free radical production or DNA damage. Journal of the Neurological Sciences, 164 (1). pp. 89-92. ISSN 0022-510X

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Abstract

Oxidative stress may play a role in the pathogenesis of familial amyotrophic lateral sclerosis (FALS). Superoxide dismutases (SODs) are enzymes that can influence free radical processes in irradiated cells and there is some evidence that manipulation of SODs can affect survival of cells after radiation treatments. SOD-1 associated FALS mutants may have an altered radiation response due to an enhanced generation of hydroxyl radicals or a compromised ability to neutralize free radicals. We have investigated the ability of the lymphoblastoid cell lines from FALS patients with SOD-1 gene mutations, patients with sporadic ALS and controls to handle oxidative stress induced by ionising radiation by measuring levels of intracellular reactive oxygen species and production of DNA double-strand breaks. Levels of reactive oxygen species, expressed as the slope of the relative fluorescence of a radical-reactive fluorochrome, in the cells from familial ALS patients with SOD-1 gene mutations (2.14±1.06 Gy−1) and patients with sporadic ALS (1.38±0.21 Gy−1) were not significantly different from the controls (1.54±0.39 Gy−1). No significant difference was observed in the production of DNA double-strand breaks between three groups. The ability of lymphoblastoid cells from FALS patients with SOD-1 gene mutations to scavenge radiation-induced free radicals is not compromised nor is their ability to protect DNA damage induced by ionising radiation.

Item Type: Article
Journal or Publication Title: Journal of the Neurological Sciences
Uncontrolled Keywords: Amyotrophic lateral sclerosis ; SOD-1 ; Reactive oxygen species ; DNA damage ; Ionising radiation
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
Faculty of Science and Technology > Engineering
VC's Office
ID Code: 8729
Deposited By: Professor Trevor McMillan
Deposited On: 09 May 2008 10:12
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:25
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/8729

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