Abstract
Resveratrol (3,4′,5-trihydroxy-trans-stilbene) is a natural phytoalexin found in grapes and wine. It has antioxidant and antiproliferative activities, and has been shown to induce NAD(P)H:quinone oxidoreductase, also known as DT-diaphorase, in cultured mouse hepatoma cells. DT-diaphorase is a detoxifying enzyme for quinone-containing substances, due to its ability to prevent their one-electron reduction and the consequent generation of reactive oxygen species (ROS). The aim of the present study was to investigate whether oral administration of trans-resveratrol to guinea pigs (60 mg/l in tap water for 16 days, ad libitum) increases cardiac DT-diaphorase and, consequently, reduces the response of isolated atria to 2-methyl-1,4-naphthoquinone (menadione), the positive inotropic effect of which is related to the amount of ROS generated by its cardiac metabolism. In the cardiac tissue of resveratrol-treated animals, DT-diaphorase activity was significantly higher than that measured in control animals, the Vmax of the enzyme reaction being 75.47 ± 3.87 and 50.73 ± 0.63 nmoles/mg protein/min, respectively (p < 0.05). Resveratrol administration also significantly increased the activity of cardiac catalase (32.20 ± 2.39 vs. 25.14 ± 3.85 units/mg protein in treated and control animals, respectively; p < 0.001). As a consequence, menadione metabolism by the cardiac homogenate obtained from resveratrol-treated animals generated a smaller amount of ROS and, in electrically driven left atria, menadione produced a significantly lower increase in the force of contraction than in atria isolated from control animals. These results indicate that oral administration of resveratrol exerts cardioprotection against ROS-mediated menadione toxicity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2741-2750 |
| Number of pages | 10 |
| Journal | Life Sciences |
| Volume | 72 |
| Issue number | 24 |
| DOIs | |
| State | Published - May 2 2003 |
| Externally published | Yes |
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Keywords
- Cardiotoxicity
- Catalase
- DT-diaphorase
- Guinea pigs
- Menadione
- Resveratrol
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Pharmacology, Toxicology and Pharmaceutics(all)
Cite this
Oral administration of trans-resveratrol to guinea pigs increases cardiac DT-diaphorase and catalase activities, and protects isolated atria from menadione toxicity. / Floreani, Maura; Napoli, Eleonora; Quintieri, Luigi; Palatini, Pietro.
In: Life Sciences, Vol. 72, No. 24, 02.05.2003, p. 2741-2750.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Oral administration of trans-resveratrol to guinea pigs increases cardiac DT-diaphorase and catalase activities, and protects isolated atria from menadione toxicity
AU - Floreani, Maura
AU - Napoli, Eleonora
AU - Quintieri, Luigi
AU - Palatini, Pietro
PY - 2003/5/2
Y1 - 2003/5/2
N2 - Resveratrol (3,4′,5-trihydroxy-trans-stilbene) is a natural phytoalexin found in grapes and wine. It has antioxidant and antiproliferative activities, and has been shown to induce NAD(P)H:quinone oxidoreductase, also known as DT-diaphorase, in cultured mouse hepatoma cells. DT-diaphorase is a detoxifying enzyme for quinone-containing substances, due to its ability to prevent their one-electron reduction and the consequent generation of reactive oxygen species (ROS). The aim of the present study was to investigate whether oral administration of trans-resveratrol to guinea pigs (60 mg/l in tap water for 16 days, ad libitum) increases cardiac DT-diaphorase and, consequently, reduces the response of isolated atria to 2-methyl-1,4-naphthoquinone (menadione), the positive inotropic effect of which is related to the amount of ROS generated by its cardiac metabolism. In the cardiac tissue of resveratrol-treated animals, DT-diaphorase activity was significantly higher than that measured in control animals, the Vmax of the enzyme reaction being 75.47 ± 3.87 and 50.73 ± 0.63 nmoles/mg protein/min, respectively (p < 0.05). Resveratrol administration also significantly increased the activity of cardiac catalase (32.20 ± 2.39 vs. 25.14 ± 3.85 units/mg protein in treated and control animals, respectively; p < 0.001). As a consequence, menadione metabolism by the cardiac homogenate obtained from resveratrol-treated animals generated a smaller amount of ROS and, in electrically driven left atria, menadione produced a significantly lower increase in the force of contraction than in atria isolated from control animals. These results indicate that oral administration of resveratrol exerts cardioprotection against ROS-mediated menadione toxicity.
AB - Resveratrol (3,4′,5-trihydroxy-trans-stilbene) is a natural phytoalexin found in grapes and wine. It has antioxidant and antiproliferative activities, and has been shown to induce NAD(P)H:quinone oxidoreductase, also known as DT-diaphorase, in cultured mouse hepatoma cells. DT-diaphorase is a detoxifying enzyme for quinone-containing substances, due to its ability to prevent their one-electron reduction and the consequent generation of reactive oxygen species (ROS). The aim of the present study was to investigate whether oral administration of trans-resveratrol to guinea pigs (60 mg/l in tap water for 16 days, ad libitum) increases cardiac DT-diaphorase and, consequently, reduces the response of isolated atria to 2-methyl-1,4-naphthoquinone (menadione), the positive inotropic effect of which is related to the amount of ROS generated by its cardiac metabolism. In the cardiac tissue of resveratrol-treated animals, DT-diaphorase activity was significantly higher than that measured in control animals, the Vmax of the enzyme reaction being 75.47 ± 3.87 and 50.73 ± 0.63 nmoles/mg protein/min, respectively (p < 0.05). Resveratrol administration also significantly increased the activity of cardiac catalase (32.20 ± 2.39 vs. 25.14 ± 3.85 units/mg protein in treated and control animals, respectively; p < 0.001). As a consequence, menadione metabolism by the cardiac homogenate obtained from resveratrol-treated animals generated a smaller amount of ROS and, in electrically driven left atria, menadione produced a significantly lower increase in the force of contraction than in atria isolated from control animals. These results indicate that oral administration of resveratrol exerts cardioprotection against ROS-mediated menadione toxicity.
KW - Cardiotoxicity
KW - Catalase
KW - DT-diaphorase
KW - Guinea pigs
KW - Menadione
KW - Resveratrol
UR - http://www.scopus.com/inward/record.url?scp=0037414403&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037414403&partnerID=8YFLogxK
U2 - 10.1016/S0024-3205(03)00179-6
DO - 10.1016/S0024-3205(03)00179-6
M3 - Article
C2 - 12679191
AN - SCOPUS:0037414403
VL - 72
SP - 2741
EP - 2750
JO - Life Sciences
JF - Life Sciences
SN - 0024-3205
IS - 24
ER -