Inhibitory effect of vanillic acid on methylglyoxal-mediated glycation in apoptotic Neuro-2A cells

Neurotoxicology
Shang-Ming HuangGow-Chin Yen

Abstract

Methylglyoxal is a reactive dicarbonyl compound generated as an intermediate of glycolysis during the physical glycation in the diabetic condition. It is considered to be a potent precursor of advanced glycation end products (AGEs) formation. Methylglyoxal itself and methylglyoxal-derived AGEs have been commonly implicated in the development of diabetic neuropathy. Our previous study indicated that vanillic acid showed an inhibitory effect against methylglyoxal-mediated Neuro-2A cell apoptosis, suggesting that vanillic acid might possess cytoprotective properties in the prevention of diabetic neuropathy complication. In this study, the effects of vanillic acid on the methylglyoxal-mediated glycation system involved in the progression of Neuro-2A cell apoptosis were further investigated. Our findings indicated that methylglyoxal-induced Neuro-2A cell apoptosis was mediated through the possible glycation mechanism of oxidative stress, activation of the MAPK signaling pathway (p38 and JNK) and oxidation-sensitive protein expression (PKC and p47(phox)) and methylglyoxal-derived N-epsilon-(carboxymethyl)lysine (CML) formation. Vanillic acid, however, suppressed methylglyoxal-induced Neuro-2A cell apoptosis via inhibition of glycatio...Continue Reading

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis