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In Vitro and In Vivo Aldose Reductase Inhibitory Activity of Standardized Extracts and the Major Constituent of Andrographis paniculata
Author(s) -
Veeresham Ciddi,
Swetha Ettireddy,
Rao Ajmeera Rama,
Asres Kaleab
Publication year - 2013
Publication title -
phytotherapy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.019
H-Index - 129
eISSN - 1099-1573
pISSN - 0951-418X
DOI - 10.1002/ptr.4722
Subject(s) - aldose reductase , galactitol , andrographis paniculata , in vivo , polyol pathway , sorbitol , aldehyde reductase , biochemistry , in vitro , sorbinil , andrographolide , ex vivo , chemistry , biology , pharmacology , enzyme , aldose reductase inhibitor , medicine , alternative medicine , microbiology and biotechnology , pathology , galactose
Aldose reductase is the first enzyme in the polyol pathway and catalyzes the reduction of glucose to sorbitol by coupling with the oxidation of NADPH to NADP + . This sorbitol accumulation leads to various diabetic complications, including neuropathy, nephropathy, cataracts, and retinopathy. In the present study, aldose reductase inhibitory (ARI) activity of the methanolic as well as standardized extracts of Andrographis paniculata (Burm. f.) Wall. ex Nees (Acanthaceae) and its chief constituent, andrographolide, were studied using in vitro and in vivo methods. In the in vitro method, rat lens as well as kidney homogenates were used for the preparation of enzyme, whereas the effect of these test samples on the galactitol level in the eye lens was studied in a galactosemic rat model in vivo . The results of the study revealed that both extracts of the plant and its major compound, andrographolide, possess ARI activity in vitro . They were also found to significantly decrease galactitol accumulation in vivo . Copyright © 2012 John Wiley & Sons, Ltd.