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Effect of C7 modifications on benzothiadiazine-1,1-dioxide derivatives on their inhibitory activity and selectivity

Shuzhen Zhang1, Xin Chen, Shagufta Parveen

  • 1Department of Applied Chemistry, Beijing Institute of Technology, Zhongguancun South Street, 100081 Beijing, China.

Chemmedchem
|November 9, 2012
PubMed

Insights

Researchers developed novel 1,2,4-benzothiadiazine-1,1-dioxide derivatives to inhibit aldose reductase (ALR2), a key factor in diabetic complications. The most effective compounds showed high potency and selectivity, offering potential therapeutic benefits.

Area of Science:

  • Medicinal Chemistry
  • Biochemistry
  • Pharmacology

Background:

  • Diabetic chronic complications like retinopathy and nephropathy are linked to aldose reductase (ALR2) overactivation.
  • Aldose reductase (ALR2) is a crucial enzyme in the aldo-keto reductase superfamily implicated in polyol pathway overflux.

Purpose of the Study:

  • To discover potent and selective aldose reductase (ALR2) inhibitors.
  • To explore structure-activity relationships at the C7 position of 1,2,4-benzothiadiazine-1,1-dioxide derivatives.

Main Methods:

  • Synthesis of novel C7-substituted 1,2,4-benzothiadiazine-1,1-dioxide derivatives.
  • In vitro evaluation of inhibitory activity against aldose reductase (ALR2) and aldehyde reductase (ALR1).
  • Structure-activity relationship (SAR) analysis and molecular modeling.

Main Results:

  • A series of new C7-substituted compounds were synthesized and evaluated.
  • IC(50) values for ALR2 inhibition ranged from 2.80 to 45.13 nM.
  • Two compounds with C7-dimethylcarbamoyl and C7-diethylcarbamoyl substituents demonstrated the highest potency and excellent selectivity for ALR2 over ALR1.

Conclusions:

  • Hydrophobic and bulky groups at the C7 position are crucial for potent and selective ALR2 inhibition.
  • The developed compounds represent promising leads for ALR2 inhibitor drug discovery.
  • Targeting ALR2 with novel inhibitors may offer a therapeutic strategy for diabetic complications.

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