Review Article

Antioxidant Effects of Protocatechuic Acid and Protocatechuic Aldehyde: Old Wine in a New Bottle

Table 3

Summary of the effects on antioxidants of PCA and PAL in vivo.

DiseasesPCA/PAL dosagesModel usedOxidative stress mechanismsReferences

Neurodegenerative diseasesPCA (5 mg/kg/day, i.p.)Male SD ratsDownregulation of lipid peroxidation and upregulation of glutathione peroxidase and superoxide dismutase activity[118]
PDPAL mice (7.5, 15, and 30 mg/kg/12 h p.o.) and rats (20 and 40 mg/kg/12 h, p.o.)MPTP-induced PD in mice and 6-OHDA-induced SD ratsInduction of DJ-1 and reduction of a-synuclein expression[100]
PDPCA (10 and 20 mg/kg/day, i.p.)MPTP-intoxicated miceMitigation of oxidative damage and mitochondrial dysfunction through PLK2/p-GSK3β/Nrf2 pathway[101]
PDPCA (6, 12, and 25 μM)6-OHDA-induced PD zebrafishDownregulation of lipid peroxidation and induction of antioxidant enzymes (SOD, CAT, and GSH) activity[102]
Cerebral ischemicPCA (200 mg/kg/day, i.p.)Cerebral ischemic ratsSuppression of MDA formation and induction of endogenous antioxidant (SOD, CAT, and GSH) activity[117]
DepressionPCA (100 and 200 mg/kg/day, p.o.)OBX induced depressive-like behavior in Wistar rat modelInduction of BDNF, 5-HT, DA, and NE and suppression of MDA, IL-6, and TNF-α[121]
DepressionPCA (100 and 200 mg/kg/day, p.o.)ARS-induced depressive-like behavior in Swiss albino miceInduction of antioxidant marker levels/activities[106]
I/R injuryPAL (40 mg/kg/day, i.v.)Middle cerebral artery occlusion- (MCAO-) induced I/R injury in SD ratsActivation of PKCε/Nrf2/HO-1 pathway[104]
DiabetesPCA (50, 100, and 200 mg/kg/day, p.o.)STZ-diabetic ratsInduction of antihyperglycemic effect[128]
DiabetesPCA (50 and 100 mg/kg/day, p.o.)T1DM adult male SD ratsInhibition of brain oxidative stress by improving brain mitochondrial function in T1DM rats[91]
DiabetesPCA (50 and 100 mg/kg/day, p.o.)DC-treated Wistar ratsInduction of antioxidant, hypoglycemic, insulin-sensitizing, and anti-inflammatory effects[7]
DiabetesPCA (50 mg/kg/day, p.o.)STZ-diabetic ratsInduction of endogenous antioxidant, suppression of lipid peroxidation, inflammation, caspase-3, and acetylcholinesterase activities[107]
CVDPCA (50, 100, and 200 mg/kg/day, p.o.)Glucocorticoid-induced hypertension in ratsSuppression of plasma H2O2 concentration and induction of FRAP values[140]
CVDPCA (200 mg/kg/day, p.o.)Male aging spontaneously hypertensive ratsInduction of insulin and IGF-1 in aging hypertension by PI3K-NOS-NO signaling[139]
CVDPCA (100 mg/kg/day, p.o.)TCDD-induced cardiotoxicity in male SD ratsSuppression of oxidative stress[136]
CVDPCA (50 and 100 mg/kg/day, p.o.)Dex-induced hypertensive male Wistar ratsInduction of eNOS and suppression of NOX4 expression[132]
CVDPCA (100 mg/kg/day, p.o.)HFD-fed male C57BL/6J miceSuppression of Ac-CoA or Sirt1 and Sirt3 activation through CD36/AMPK signaling[146]
CVDPAL (10, 30, and 100 mg/kg/day, i.g.)Isoproterenol-induced cardiac hypertrophy in SD ratsInhibition of JAK2/STAT3 signaling[141]
CVDPAL (100 mg/kg/day, p.o.)Common Carotid Balloon injury SD ratsReduction of ROS activity and inflammation, increase of cAMP and GPER-1, increased CD31 and GPER-1, and decreased VCAM-1 and CD40 expression[143]
Myocardial fibrosisPAL (30 mg/kg/day, i.p.), PCA (30 mg/kg/day, i.p.)Isoprenaline- (ISO-) treated C57BL/6 miceModulation of collagen conformational dynamics[142]
Ischemic injuryPCA (4 mg/kg, i.p.)I/R injury SD ratsElevation of GSH levels and reduction of ROS[148]
ObesityPCA (100 μM)Visceral adipose tissue from female obese individualsSuppression of PTP1B activity[8]
NAFLDPCA, rats (10 and 20 mg/kg/day), mice (30 mg/kg/day)HFD-fed male SD rats, C57BL/6 mice, and SIRT3−/− miceSuppression of NAFLD through the SIRT3/ACSF3 signaling[150]
Liver injuryPCA (0.45, 0.9, and 1.8 mg/kg/day, i.p.)Cisplatin-induced acute kidney injury in miceSuppression of cisplatin-induced death through inhibition of Nox4[164]
Liver injuryPCA (50 and 100 mg/kg/day, p.o.)t-BHP-treated male SD ratsInduction of antioxidant enzymatic activities and suppression of stress signal transduction[88]
Liver injuryPCA (10 and 20 mg/kg/day, p.o.)ALD male SD rat modelInduction of miR-219a-5p expression and suppression of p66shc-mediated ROS formation[149]
Liver injuryPCA (100 mg/kg/day, p.o.)D-GalN-induced hepatotoxicity in male albino Wistar ratsInduction of antihyperlipidemic activity and DNA damage protection[152]
Liver and kidney injuryPCA (10 and 20 mg/kg/day, p.o.)Cadmium-induced hepatotoxicity and nephrotoxicity in male Wistar ratsSuppression of lipid peroxidation and elevation of kidney parameters and liver marker enzymes[153]
Kidney injuryPCA (10 and 20 mg/kg/day, i.p.)DOX-treated Wistar ratsReversion of kidney antioxidant enzymes CAT, SOD, GPx, GSH, and GST levels[166]
AgingPCA (100 and 200 μM)Age-synchronized N2 Caenorhabditis elegansInhibition of intracellular ROS level and antioxidant enzyme activities of nematodes[120]
Reproductive damagePCA (10 and 40 mg/kg/day, p.o.)Testosterone propionate- (TP-) induced BPH castrated albino Wistar ratReduction of MPO activity, MDA, and NO level[168]
SepsisPAL (25, 50, and 100 mg/kg, injection into the tail vein)CLP-induced sepsis in male Sprague-Dawley ratsSuppression of HMGB1 and NF-κB signaling[14]