Maqui berry (Aristotelia chilensis) and the constituent delphinidin glycoside inhibit photoreceptor cell death induced by visible light.
The protective effects of maqui berry (Aristotelia chilensis) extract (MBE) and its major anthocyanins [delphinidin 3,5-O-diglucoside (D3G5G) and delphinidin 3-O-sambubioside-5-O-glucoside (D3S5G)] against light-induced murine photoreceptor cells (661W) death were evaluated. Viability of 661W after light treatment for 24h, assessed by the tetrazolium salt (WST-8) assay and Hoechst 33342 nuclear staining, was improved by addition of MBE, D3G5G, and D3S5G. Intracellular radical activation in 661W, evaluated using the reactive oxygen species (ROS)-sensitive probe 5-(and-6)-chloromethyl-2,7-dichlorodihydro fluorescein diacetate acetyl ester (CM-H2DCFDA), was reduced by MBE and its anthocyanins. The anti-apoptosis mechanism of MBE was evaluated by light-induced phosphorylation of p38. MBE significantly suppressed the light-induced phosphorylation of p38. These findings indicate that MBE and its anthocyanidins suppress the light-induced photoreceptor cell death by inhibiting ROS production, suggesting that the inhibition of phosphorylated-p38 may be involved in the underlying mechanism.
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CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL GENE-N GENE-N GENE-N GENE-N CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL
5-(and-6)-chloromethyl-2,7-dichlorodihydro fluorescein diacetate acetyl ester CM-H2DCFDA anthocyanins anthocyanins anthocyanidins delphinidin glycoside phosphorylated-p38 p38 p38 photoreceptor delphinidin 3,5-O-diglucoside D3G5G delphinidin 3-O-sambubioside-5-O-glucoside D3S5G tetrazolium Hoechst 33342 D3G5G D3S5G oxygen