In vivo antioksidativni potencijal biljke Teucrium polium u usporedbi s α-tokoferolom

The present study was undertaken to explore antioxidant potential of Teucrium polium (Lamiaceae) in vivo. Antioxidant activity was measured by three tests including inhibition of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, total antioxidant power (TAP), and thiobarbituric acid reactive substances (TBARS) in serum. Rats received dry extract of T. polium in 80% ethanol by intragastric intubation at doses of 50, 100 and 200 mg kg-1 daily for 14 days. Treatment of rats with T. polium extract showed significant antioxidant activity in the DPPH test as compared to the control. T. polium extract at doses of 50 and 100 mg kg-1 significantly increased rats\u27 TAP and decreased TBARS compared to the control. Administration of T. polium at a dose of 200 mg kg-1 per day did not significantly alter serum TAP and TBARS. Antioxidant activities of T. polium at doses of 50 and 100 mg kg-1 were comparable to that of -tocopherol (10 mg kg-1) in all experiments.U okviru ovih istraživanja ispitan je antioksidativni potencijal biljke Teucrium polium L. Lamiaceae in vivo. Antioksidativni učinak je mjeren pomoću tri testa koji uključuju inhibiciju 1,1-difenil-2-pikrilhidrazil (DPPH) radikala, ukupnu antioksidativnu snagu (TAP) i reaktivne supstancije tiobarbiturne kiseline (TBARS) u serumu. Štakorima je davan suhi ekstrakt T. polium u 80%-tnom etanolu intragastričnom intubacijom u dozama od 50, 100 i 200 mg kg-1 dnevno tijekom 14 dana. Pokusi su pokazali značajno antioksidativno djelovanje T. polium DPPH testom u usporedbi s kontrolom. T. polium je u dozama 50 i 100 mg kg-1 značajno povisio TAP i snizio TBARS u usporedbi s kontrolom. Primjena ekstrakta T. polium u dozi od 200 mg kg-1 dnevno nije značajno mijenjala serumske TAP i TBARS vrijednosti. Antioksidativni učinak T. polium u dozama 50 i 100 mg kg-1 u svim eksperimentima bio je sličan učincima α-tokoferola (10 mg kg-1). Preliminarna ispitivanja ukazuje na antistresni učinak T. polium koji je usporediv antioksidativnom učinku. Međutim, potrebna su daljnja ispitivanja da se rasvijetli bi li T. polium mogla biti korisna u uklanjanju posljedica oksidativnog stresa

Effects of Satureja khuzestanica on Serum Glucose, Lipids and Markers of Oxidative Stress in Patients with Type 2 Diabetes Mellitus: A Double-Blind Randomized Controlled Trial

Satureja khuzestanica is an endemic plant of Iran that is widely distributed in the Southern part of the country. It has antioxidant properties and thus it seems to be useful in diseases related to oxidative stress such as diabetes and hyperlipidemia. The present study investigates the effect of S. khuzestanica supplement in metabolic parameters of hyperlipidemic patients with type 2 diabetes mellitus. Twenty-one hyperlipidemic patients with type 2 diabetes mellitus were randomized in a double blind, placebo controlled clinical trial to receive either S. khuzestanica (tablets contain 250 mg dried leaves) or placebo once a day for 60 days. Blood samples were obtained at baseline and at the end of the study. Samples were analyzed for levels of glucose, total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, creatinine, thiobarbituric acid reactive substances (TBARS) as marker of lipid peroxidation and ferric reducing ability (total antioxidant power, TAP). Treatment of patients by S. khuzestanica for 60 days induced significant decrease in total cholesterol (P = 0.008) and LDL-cholesterol (P = 0.03) while increased HDL-cholesterol (P = 0.02) and TAP (P = 0.007) in comparison with the baseline values. S. khuzestanica did not alter blood glucose, triglyceride, creatinin and TBARS levels. In comparison with baseline values, no significant change was observed in blood glucose, total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, creatinine, TBARS and TAP in placebo-treated group. Usage of S. khuzestanica as a supplement to drug regimen of diabetic type 2 patients with hyperlipidemia is recommended