TY - JOUR
T1 - Structure-hepatoprotective activity relationship of 3,4-dihydroxycinnamic acid (Caffeic Acid) derivatives
AU - Pérez-Alvarez, V.
AU - Bobadilla, R. A.
AU - Muriel, P.
PY - 2001
Y1 - 2001
N2 - 3,4-Dihydroxycinnamic acid (caffeic acid, CAF) is a natural product containing a catechol group with an α,β-unsaturated carboxylic acid chain that has shown hepatoprotective properties. The aim of this work was to determine the importance of the 4-hydroxy, 3-hydroxy, 3,4-dihydroxy substituents and the double bond moiety on the hepatic pharmacological effects of the molecule. We compared the ability of the caffeic, 4-hydroxycinnamic, 3-hydroxycinnamic, cinnamic and 3,4-dihydroxyhydrocinnamic (a caffeic acid analogue without the double bond) acids at a dose of 50 mg kg-1, p.o., to reduce the liver damage produced by CCl4 (4 g kg-1, p.o.) intoxication in the rat. Cinnamic acid, the non-hydroxylated analogue, only modestly protected the experimental animals challenged with CCl4, suggesting that hydroxyl groups participate in the pharmacological properties of CAF. The 3,4-dihydroxyhydrocinnamic derivative did not show any significant differences when compared with the CAF effect in this model, suggesting that the double bond does not account for the liver pharmacological properties of CAF. In contrast, the 4-hydroxy substituent seems to be very important for hepatoprotective activity because the 4-hydroxy analogue improved almost every hepatic injury marker altered by CCl4, and in a better way than CAF did.
AB - 3,4-Dihydroxycinnamic acid (caffeic acid, CAF) is a natural product containing a catechol group with an α,β-unsaturated carboxylic acid chain that has shown hepatoprotective properties. The aim of this work was to determine the importance of the 4-hydroxy, 3-hydroxy, 3,4-dihydroxy substituents and the double bond moiety on the hepatic pharmacological effects of the molecule. We compared the ability of the caffeic, 4-hydroxycinnamic, 3-hydroxycinnamic, cinnamic and 3,4-dihydroxyhydrocinnamic (a caffeic acid analogue without the double bond) acids at a dose of 50 mg kg-1, p.o., to reduce the liver damage produced by CCl4 (4 g kg-1, p.o.) intoxication in the rat. Cinnamic acid, the non-hydroxylated analogue, only modestly protected the experimental animals challenged with CCl4, suggesting that hydroxyl groups participate in the pharmacological properties of CAF. The 3,4-dihydroxyhydrocinnamic derivative did not show any significant differences when compared with the CAF effect in this model, suggesting that the double bond does not account for the liver pharmacological properties of CAF. In contrast, the 4-hydroxy substituent seems to be very important for hepatoprotective activity because the 4-hydroxy analogue improved almost every hepatic injury marker altered by CCl4, and in a better way than CAF did.
KW - Arachidonic acid
KW - CCI
KW - Caffeic acid
KW - Leucotrienes
KW - Liver damage
UR - http://www.scopus.com/inward/record.url?scp=0035203337&partnerID=8YFLogxK
U2 - 10.1002/jat.806
DO - 10.1002/jat.806
M3 - Artículo
SN - 0260-437X
VL - 21
SP - 527
EP - 531
JO - Journal of Applied Toxicology
JF - Journal of Applied Toxicology
IS - 6
ER -