Neuroprotective effects of hydrogen sulfide on sodium azide-induced oxidative stress in PC12 cells.

Title Neuroprotective effects of hydrogen sulfide on sodium azide-induced oxidative stress in PC12 cells.
Authors C. Gao; P. Chang; L. Yang; Y. Wang; S. Zhu; H. Shan; M. Zhang; L. Tao
Journal Int J Mol Med
DOI 10.3892/ijmm.2017.3227
Abstract

Alzheimer's disease (AD) is the most common neurodegenerative disorder, responsible for >50% of all dementia cases. Sodium azide (NaN3) inhibits cytochrome oxidase by irreversibly binding to the heme cofactor and selectively reducing the complex IV activity, which is present in post?mortem AD brains. Previous data demonstrated that hydrogen sulfide (H2S), the third endogenous gaseous mediator, exerted protective effects against neuronal damage. Therefore, it was hypothesized that H2S may be able to scavenge excess reactive oxygen species (ROS), thereby protecting against oxidative stress and cell death. In the present study, it was observed that cell viability decreased in a concentration-dependent manner 12 h after NaN3 treatment (20, 30 and 50 mmol/l). A decrease in cell viability (to 51±3%) was observed 12 h after treatment with 30 mM NaN3. NaN3 treatment also led to decreased mitochondrial membrane potential, increased lipid peroxidation (excessive production of malondialdehyde), and increased the protein expression levels of caspase-3. Pretreatment with H2S (200 µmol/l) attenuated NaN3-mediated apoptosis, and the anti-apoptotic action of H2S was partially dependent on suppressing the production of ROS. The findings of the present study suggested that H2S exerted a neuroprotective effect against NaN3-induced neurotoxicity through mechanisms related to anti-oxidation and anti-apoptosis. Therefore, the findings of the present study suggest there may be a promising future for H2S-based preventions and therapies for neuronal damage following exposure to NaN3.

Citation C. Gao; P. Chang; L. Yang; Y. Wang; S. Zhu; H. Shan; M. Zhang; L. Tao.Neuroprotective effects of hydrogen sulfide on sodium azide-induced oxidative stress in PC12 cells.. Int J Mol Med. 2018;41(1):242250. doi:10.3892/ijmm.2017.3227

Related Elements

Sodium

Sodium Bohr ModelSee more Sodium products. Sodium (atomic symbol: Na, atomic number: 11) is a Block D, Group 5, Period 4 element with an atomic weight of 22.989769. The number of electrons in each of Sodium's shells is [2, 8, 1] and its electron configuration is [Ne] 3s1. The sodium atom has a radius of 185.8 pm and a Van der Waals radius of 227 pm. Sodium was discovered and first isolated by Sir Humphrey Davy in 1807. In its elemental form, sodium has a silvery-white metallic appearance. It is the sixth most abundant element, making up 2.6 % of the earth's crust. Sodium does not occur in nature as a free element and must be extracted from its compounds (e.g., feldspars, sodalite, and rock salt). The name Sodium is thought to come from the Arabic word suda, meaning "headache" (due to sodium carbonate's headache-alleviating properties), and its elemental symbol Na comes from natrium, its Latin name.

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