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Inhibitory effect on curcumin on mammalian phospholipase D activity
H Yamamoto1, K Hanada, K Kawasaki
1Department of Biochemistry and Cell Biology, National Institute of Infectious Diseases, Toyama, Tokyo, Japan.
FEBS Letters
|December 12, 1997
Summary
Curcumin, a compound from turmeric, effectively inhibits phospholipase D (PLD) and other enzymes. This inhibition may explain curcumin's anti-inflammatory and anti-carcinogenic properties.
Area of Science:
- Biochemistry
- Pharmacology
Background:
- Curcumin, derived from turmeric (Curcuma longa), exhibits significant anti-carcinogenic and anti-inflammatory properties.
- Phospholipases are key enzymes involved in cellular signaling pathways relevant to inflammation and cancer.
Purpose of the Study:
- To investigate the effects of curcumin on the enzymatic activities of various phospholipases.
- To determine if curcumin's known biological activities are mediated through phospholipase inhibition.
Main Methods:
- Enzyme activity assays were performed in a cell-free system using purified enzymes and cell extracts.
- Tested phospholipases included G protein-mediated phospholipase D (PLD), phosphatidylinositol-specific phospholipase C, phospholipase A2, sphingomyelinase, and phosphatidylcholine-phospholipase C.
- Curcumin's effect on 12-O-tetradecanoylphorbol-13-acetate-induced PLD activation in intact J774.1 cells was also assessed.
Main Results:
- Curcumin demonstrated inhibitory effects on several tested phospholipases.
- Phospholipase D (PLD) was the most effectively inhibited enzyme by curcumin.
- Curcumin inhibited PLD activation in intact J774.1 cells in a dose-dependent manner.
Conclusions:
- Curcumin's inhibition of phospholipase D (PLD) activity is a significant finding.
- These results suggest that PLD inhibition by curcumin contributes to its observed anti-inflammatory and anti-carcinogenic effects.