Neuroprotective effects of black soybean anthocyanins via inactivation of ASK1-JNK/p38 pathways and mobilization of cellular sialic acids

详细信息	查看全文 | 推荐本文 |

• 作者：Sung Min Kim^a ; ¹ ; Mi Ja Chung^a ; ¹ ; Tae Joung Ha^b ; Ha Na Choi^a ; Seong Jae Jang^a ; Sung Oog Kim^a ; Myung Hoon Chun^c ; Su Il Do^d ; Young Kug Choo^e ; Yong Il Park^a ; ^{yongil382@catholic.ac.kr}
• 关键词：Oxidative stress ; Anthocyanins ; H2O2 ; Sialic acid ; Neu1 sialidase
• 刊名：Life Sciences
• 出版年：2012
• 期刊代码：62_00243205
• 类别：imm
• 出版时间：6 June, 2012
• 卷：90
• 期：21-22
• 页码：874-882
• 文件大小：896 K

摘要

Aims

To investigate neuroprotective effects of three major anthocyanins (cyanidin-3-O-glucoside, delphinidin-3-O-glucoside, and petunidin-3-O-glucoside) isolated from the black soybean (Glycine max L.) cv. Cheongja 3 seed coat against H₂O₂-induced cell death of human brain neuroblastoma SK-N-SH cells.

Main methods

Cell viability, reactive oxygen species (ROS) generation, production and expression of heme oxygenase (HO)-1 and inactivation of mitogen-activated protein (MAP) kinase cascades were determined by MTT assay, 2,7-dichlorofluorescein diacetate (DCF-DA) assay, reverse transcriptase polymerase chain reaction (RT-PCR), and western blotting, respectively.

Key findings

Pretreatment with anthocyanins reduced the cytotoxicity of H₂O₂ on SK-N-SH cells, dose-dependently reduced the intracellular ROS level and inactivated apoptosis signal-regulating kinase (ASK1, Thr845), p38, and c-Jun N-terminal kinase (JNK) proteins. The HO-1 and Neu1 mRNA levels were increased by H₂O₂ (25 渭M) and further elevated by the pretreatment with anthocyanins. Sialic acids added to the culture plates not only attenuated the cytotoxicity of H₂O₂ (25 渭M) but also reduced intracellular ROS level. These results suggest that Cheongja 3 black soybean seed coat anthocyanins have brain neuroprotective effects against oxidative stress (H₂O₂) by inhibiting the activation of ASK1-JNK/p38 pathways, scavenging ROS, stimulating the expression of HO-1 and, more interestingly, recruiting cellular free sialic acids through up-regulation of Neu1 sialidase gene expression.

Significance

This is the first report indicating potent health benefits of black soybean seed coat anthocyanins in neuroprotection by triggering mobilization of cellular free sialic acid and utilizing it as an additional biological antioxidant in brain neural cells.