Synergistic Neuroprotective Effects of Two Herbal Ingredients Via CREB-Dependent Pathway

Overview

Journal Front Pharmacol

Date 2016 Oct 13

PMID 27729863

Citations 7

Authors

Xu Liu

Dongxiao Wang

Runqing Zhao

Xianzhe Dong

Yuan Hu

Ping Liu

Affiliations

Soon will be listed here.

Abstract

As two natural oligosaccharide esters, 3,6'-Disinapoyl sucrose (DISS) and tenuifolisideA (TFSA) are originating from the root of Willd, a traditional Chinese medicine used in treatment of mental disorders. Previous reports have shown that both of them possess neuroprotective effects by stimulating different upstream pathways related with cyclic AMP-responsive element-binding protein (CREB). In the present study, we investigated the additive neuroprotective effects of DISS and TFSA on Glu-induced damage of SY5Y cells and purposed the possible underlying mechanism. The interaction between DISS and TFSA showed a clear-cut synergistic effect as evidenced by combination index (CI). Additional evidence from biochemical (NOS activity) assays confirmed their additive inhibition on the Glu-induced NOS hyperactivation. Moreover, we showed that co-treatment of DISS and TFSA resulted in an additively up-regulated phosphorylation of CREB as well as increased expressions of CRTC1 and BDNF. Neuroprotective effects of DISS and TFSA on Glu-induced decrease in cell viability were blocked by MAPK/ERK1/2 inhibitor (U0126) and PI3-K inhibitor (LY290042). Nevertheless, the CRTC1 or BDNF expression induced by these two compounds was significantly reduced in the presence of either ERK or PI3-K inhibitor, indicating that the two oligosaccharide esters shared some common pathways in the regulation of CREB-BDNF pathway. Taken together, we, for the first time, showed that DISS and TFSA exerted the additive neuroprotective effects on CREB-BDNF signaling pathway through complementary mechanisms.

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