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Benzoxazinone-thiosemicarbazones as Antidiabetic Leads via Aldose Reductase Inhibition: Synthesis, Biological Screening and Molecular Docking Study

Muhammad Tariq Shehzad, Aqeel Imran, Guy Sedar Singor Njateng, Abdul Hameed, Muhammad Islam, Mariya Al-Rashida, Maliha Uroos, Asnuzilawati Asari, Zahid Shafiq, Jamshed Iqbal

Bioorg Chem. 2019 Jun;87:857-866.

PMID: 30551808

Abstract:

Aldose reductase is an important enzyme in the polyol pathway, where glucose is converted to fructose, and sorbitol is released. Aldose reductase activity increases in diabetes as the glucose levels increase, resulting in increased sorbitol production. Sorbitol, being less cell permeable tends to accumulate in tissues such as eye lenses, peripheral nerves and glomerulus that are not insulin sensitive. This excessive build-up of sorbitol is responsible for diabetes associated complications such as retinopathy and neuropathy. In continuation of our interest to design and discover potent inhibitors of aldo-keto reductases (AKRs; aldehyde reductase ALR1 or AKR1A, and aldose reductase ALR2 or AKR1B), herein we designed and investigated a series of new benzoxazinone-thiosemicarbazones (3a-r) as ALR2 and ALR1 inhibitors. Most compounds exhibited excellent inhibitory activities with IC50 values in lower micro-molar range. Compounds 3b and 3l were found to be most active ALR2 inhibitors with IC50 values of 0.52 ± 0.04 and 0.19 ± 0.03 μM, respectively, both compounds were more effective inhibitors as compared to the standard ALR2 inhibitor (sorbinil, with IC50 value of 3.14 ± 0.02 μM).

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AS23125 Fructose standard for IC Fructose standard for IC Price
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