Mehrnoosh Sedighi
Mostafa Cheraghi
Mahdieh Faghihi
Mohammad Rahimi-Madiseh
Ali Asghar Kiani
Mostafa Dehghani
Bahram Rasoulian
Afshin Nazari

Introduction: Oxidative stress is involved in many diseases, including hypertension, kidney failure, and heart disease. This study aimed to evaluate the effect of hydroalcoholic Cichorium intybus extract on blood pressure in rats. Antioxidant activity, phenolic and flavonoid contents of the plant extract were also evaluated. Methods: In this study, ۳۲ male Wistar rats weighing ۲۵۰-۳۰۰ g were divided into four groups of eight each. Animals in the control group were administered with normal saline and in the C. intybus groups with extract at ۲۵, ۵۰, and ۱۰۰ mg/kg for two weeks. Then, the homodynamic parameters were examined by the Power lab. The phenolic and flavonoid contents were also evaluated by a spectrophotometer and the rate of free radical scavenging activity was measured by the diphenyl-۱-picyryl-hydrazyl (DPPH) free radical method. Results: The free radical scavenging activity of C. intybus extract was obtained ۴۷.۸۵% of DPPH, and flavonoid and phenolic contents were ۸.۲۱ and ۲۷.۱۹ mg/g of dry extract, respectively. Meanwhile, median (MAP), systolic (SAP) and diastolic arterial pressure (DAP) significantly decreased in the ۵۰ mg/kg extract-treated group compared to the control and ۲۰۰ mg/kg extract-treated groups. Conclusion: Ethanol extract of C. intybus plays a protective role against hypertension, which, in part, might be due to antioxidant compounds of the plant against free radicals.