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Effects of capsaicin, dihydrocapsaicin and curcumin on copper-induced oxidation of human serum lipids

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posted on 2023-05-16, 17:56 authored by Kiran AhujaKiran Ahuja, Kunde, DA, Madeleine BallMadeleine Ball, Dominic GeraghtyDominic Geraghty
The oxidation of low-density lipoprotein (LDL) is believed to be the initiating factor for the development and progression of atherosclerosis. The active ingredients of spices such as chili and turmeric (capsaicin and curcumin, respectively) have been shown to reduce the susceptibility of LDL to oxidation. One of the techniques used to study the oxidation of LDL is to isolate LDL and subject it to metal-induced (copper or iron) oxidation. However, whole serum may represent a closer situation to in vivo conditions than using isolated LDL. We investigated the effects of different concentrations (0.1-3 μM) of capsaicin, dihydrocapsaicin, and curcumin on copper-induced oxidation of serum lipoproteins. The lag time (before initiation of oxidation) and rate of oxidation (slope of propagation phase) were calculated. The lag time increased, and the rate of oxidation decreased with increasing concentrations of the tested antioxidants (p < 0.05). A 50% increase in lag time (from control) was observed at concentrations between 0.5 and 0.7 μM for capsaicin, dihydrocapsaicin, and curcumin. This study shows that oxidation of serum lipids is reduced by capsaicinoids and curcumin in a concentration-dependent manner. © 2006 American Chemical Society.

History

Publication title

Journal of Agricultural and Food Chemistry

Volume

54

Issue

17

Pagination

6436-6439

ISSN

0021-8561

Department/School

School of Health Sciences

Publisher

American Chemical Society

Place of publication

Washington USA

Repository Status

  • Restricted

Socio-economic Objectives

Nutrition

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