Studies on aldose reductase inhibitors from natural products. Part III. Studies on aldose reductase inhibitors from medicinal plant of "Sinfito," Potentilla candicans, and further synthesis of their related compounds.

Aldose reductase inhibitors of plant origin.

Diabetic complications are attributed to hyperglycaemic condition which is in turn associated with the polyol pathway and advanced glycation end products. Aldose reductase (AR) is the principal enzyme of polyol pathway which plays a vital role in the development of diabetic complications. AR inhibitory activity can be screened by both in vitro and in vivo methods. In vitro assays for AR enzyme ...

Activators and inhibitors of lens aldose reductase.

Aldose reductase in a highly purified state is unstable. It requires the presence of thiol groups to maintain it in an active form. The enzyme apparently exists in 3 forms, only one of which is active. Tetramethylene glutaric acid (TMG) is an effective aldose reductase inhibitor. However, a relatively high level of TMG is needed to depress dulcitol synthesis in the lens incubated in a galactose...

Current status of aldose reductase inhibitors.

Selective irreversible inhibitors of aldose reductase.

A series of 5-substituted-1,3-dioxo-1H-benz[de]isoquinoline-2(3H)-acetic acid analogues have been examined as irreversible inhibitors of aldose reductase. The 5-alpha-bromoacetamide and 5-alpha-iodoacetamide analogues 5 and 6 gave irreversible inhibition of aldose reductase while the 5-alpha-chloroacetamide analogue 3 did not show this type of inhibition. Protection studies indicate that irreve...

Synthesis, activity, and molecular modeling studies of novel human aldose reductase inhibitors based on a marine natural product.

Aldose reductase (ALR2) has been implicated in the etiology of diabetic complications, including blindness. Because of the limited number of currently available drugs for the prevention of these long-term complications, the discovery of new ALR2 inhibitors appears highly desirable. In this study, a polybrominated diphenyl ether (1) naturally occurring in a marine sponge was found to inhibit rec...