Aldose reductase inhibitory compounds from Xanthium strumarium
Ha Na Yoon1, Min Young Lee, Jin-Kyu Kim
1Department of Food Science and Nutrition, Hallym University, Chuncheon, 200-702, Korea.
Archives of Pharmacal Research
|April 23, 2013
Summary
Researchers explored Xanthium strumarium for natural diabetic complication treatments. Methyl-3,5-di-O-caffeoylquinate demonstrated potent inhibition of aldose reductase and reduced galactitol formation, suggesting its therapeutic potential.
Area of Science:
- Pharmacology
- Natural Products Chemistry
- Biochemistry
Background:
- Diabetic complications are a major health concern.
- Aldose reductase (AR) plays a key role in diabetic complications by promoting galactitol formation.
- Natural products are a promising source for novel therapeutic agents.
Purpose of the Study:
- To investigate the potential of Xanthium strumarium fruit components as inhibitors of aldose reductase (AR).
- To identify specific compounds from X. strumarium that can prevent diabetic complications by inhibiting AR and galactitol formation.
Main Methods:
- Isolation and structural elucidation of 10 compounds from X. strumarium.
- In vitro assays to evaluate the inhibitory effects of isolated compounds on rat lens AR (rAR) and recombinant human AR (rhAR).
- Kinetic analysis (Lineweaver-Burk plots) to determine the inhibition mechanism.
- Assessment of galactitol formation inhibition in rat lenses and erythrocytes.
Main Results:
- Ten compounds, including 7 caffeoylquinic acids and 3 phenolic compounds, were isolated and identified.
- Methyl-3,5-di-O-caffeoylquinate exhibited potent inhibition of rAR (IC₅₀ = 0.30 μM) and rhAR (IC₅₀ = 0.67 μM).
- Methyl-3,5-di-O-caffeoylquinate competitively inhibited rhAR and effectively reduced glucose-induced galactitol formation in vitro.
Conclusions:
- Methyl-3,5-di-O-caffeoylquinate is a potent aldose reductase inhibitor derived from X. strumarium.
- This compound demonstrates potential for preventing diabetic complications by inhibiting galactitol accumulation.
- X. strumarium is a valuable source of natural compounds with therapeutic applications for diabetes management.
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