Roles of oxidative stress and endoplasmic reticulum stress in selenium deficiency-induced apoptosis in chicken liver

This study assessed the molecular mechanism of selenium (Se) protecting against kidney injury induced by zearalenone (ZEA) in mice. The experimental mice were divided into 4 groups including the control group, the Se group, the ZEA group, and the Se+ZEA group; ZEA and Se were administered orally for 28 days. The changes in renal biochemical index (BUN, UA, and CRE), biochemical change of kidney damage such as BUN, UA, and CRE, and oxidative damage such as MDA, T-SOD, and GSH-Px were investigated. Pathological sections and TUNEL staining were used to analyze renal pathological changes and cell apoptosis. qRT-PCR and Western blot were employed to detect the expression of genes and proteins which were related with endoplasmic reticulum stress. The results showed that ZEA increased the concentration of BUN, UA, and CRE and the content of MDA and decreased the activities of T-SOD and GSH-Px in the mouse kidneys. However, Se reversed above changes of the biochemical and antioxidant indexes of renal injury. Moreover, the results also showed that ZEA can increase the expression of Bax, caspase-12, caspase-3, Bip, CHOP, JNK protein, and mRNA and decrease the expression of Bcl-2 protein and mRNA. But Se reversed these proteins and genes related to endoplasmic reticulum stress and apoptosis. It can be concluded that Se protected against the kidney damage induced by ZEA. Se may protect the kidney from ZEA-induced apoptosis and oxidative stress by inhibiting ERS.

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PO9-246 HUMAN PARAOXONASE 2: AN ENDOGENOUS ENZYME AS DEFENSE SYSTEM AGAINST VASCULAR OXIDATIVE STRESS AND ENDOPLASMIC RETICULUM STRESS-INDUCED APOPTOSIS

Atherosclerosis Supplements ◽

10.1016/s1567-5688(07)71256-4 ◽

2007 ◽

Vol 8 (1) ◽

pp. 77-78

Author(s):

S. Horke ◽

I. Witte ◽

P. Wilgenbus ◽

M. Krueger ◽

D. Strand ◽

...

Keyword(s):

Oxidative Stress ◽

Endoplasmic Reticulum ◽

Endoplasmic Reticulum Stress ◽

Defense System ◽

Induced Apoptosis ◽

Vascular Oxidative Stress

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Acetaldehyde Induces Neurotoxicity In Vitro via Oxidative Stress- and Ca2+ Imbalance-Mediated Endoplasmic Reticulum Stress

Oxidative Medicine and Cellular Longevity ◽

10.1155/2019/2593742 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 5

Author(s):

Jiahui Cui ◽

Yang Liu ◽

Xing Chang ◽

Wenfeng Gou ◽

Xuejiao Zhou ◽

...

Keyword(s):

Oxidative Stress ◽

Endoplasmic Reticulum ◽

Endoplasmic Reticulum Stress ◽

Early Stage ◽

Neuronal Cells ◽

Toxic Metabolite ◽

Related Protein ◽

Ht22 Cells ◽

Induced Apoptosis

Excessive drinking can damage brain tissue and cause cognitive dysfunction. Studies have found that the early stage of neurodegenerative disease is closely related to heavy drinking. Acetaldehyde (ADE) is the main toxic metabolite of alcohol. However, the exact mechanisms of ADE-induced neurotoxicity are not fully clear. In this article, we studied the cytotoxic effect of ADE in HT22 cells and primary cultured cortical neuronal cells. We found that ADE exhibited cytotoxicities against HT22 cells and primary cultured cortical neuronal cells in dose-dependent manners. Furthermore, ADE induced apoptosis of HT22 cells by upregulating the expression of caspase family proapoptotic proteins. Moreover, ADE treatment could significantly increase the intracellular Ca2+ and reactive oxygen species (ROS) levels and activate endoplasmic reticulum stress (ERS) in HT22 cells. ADE upregulated ERS-related CHOP expression dose-dependently in primary cultured cortical neuronal cells. In addition, inhibition of ROS with antioxidant N-acetyl-L-cysteine (NAC) reduced the accumulation of ROS and reversed ADE-induced increase of ERS-related protein and apoptosis-related protein levels. Mitigation of ERS with ERS inhibitor 4-PBA obviously suppressed ADE-induced apoptosis and the expression of ERS-related proteins. Therefore, ADE induces neurotoxicity of HT22 cells via oxidative stress- and Ca2+ imbalance-mediated ERS.

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