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http://dx.doi.org/10.5483/BMBRep.2015.48.5.189

One-step isolation of sappanol and brazilin from Caesalpinia sappan and their effects on oxidative stress-induced retinal death  

Uddin, Golam Mezbah (Natural Products Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute)
Kim, Chul Young (College of Pharmacy, Hanyang University)
Chung, Donghwa (Department of Marine Food Science and Technology, Gangneung-Wonju National University)
Kim, Kyung-A (Natural Products Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute)
Jung, Sang Hoon (Natural Products Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute)
Publication Information
BMB Reports / v.48, no.5, 2015 , pp. 289-294 More about this Journal
Abstract
Caesalpinia sappan is a well-distributed plant that is cultivated in Southeast Asia, Africa, and the Americas. C. sappan has been used in Asian folk medicine and its extract has been shown to have pharmacological effects. Two homoisoflavonoids, sappanol and brazilin, were isolated from C. sappan by using centrifugal partition chromatography (CPC), and tested for protective effects against retinal cell death. The isolated homoisoflavonoids produced approximately 20-fold inhibition of N-retinylidene-N-retinyl-ethanolamine (A2E) photooxidation in a dose-dependent manner. Of the 2 compounds, brazilin showed better inhibition (197.93 ± 1.59 μM of IC50). Cell viability tests and PI/Hoechst 33342 double staining method indicated that compared to the negative control, sappanol significantly attenuated H2O2-induced retinal death. The compounds significantly blunted the up-regulation of intracellular reactive oxygen species (ROS), and sappanol inhibited lipid peroxidation in a concentration-dependent manner. Thus, both compounds represent potential antioxidant treatments for retinal diseases. [BMB Reports 2015; 48(5): 289-294]
Keywords
Antioxidant; Caesalpinia sappan; Centrifugal partition chromatography; Homoisoflavonoids; N-retinylidene-N-retinyl-ethanolamine (A2E) photooxidation;
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