alpha-Tocopherol

Publication Title: 
Human & Experimental Toxicology

HP-1 a herbal formulation comprising of Phyllanthus niruri and extracts of Terminalia belerica, Terminalia chebula, Phyllanthus emblica and Tinospora cordifolia has been evaluated for hepatoprotective activity against carbon tetrachloride (CCl4) induced toxicity. Results show that HP-1 reversed the leakage of lactate dehydrogenase (LDH) and glutamate pyruvate transaminase (GPT) and prevented the depletion of glutathione (GSH) levels in a primary monolayer culture of rat hepatocytes (in vitro).

Author(s): 
Tasaduq, S. A.
Singh, K.
Sethi, S.
Sharma, S. C.
Bedi, K. L.
Singh, J.
Jaggi, B. S.
Johri, R. K.
Publication Title: 
International Journal for Vitamin and Nutrition Research. Internationale Zeitschrift F¸r Vitamin- Und Ern‰hrungsforschung. Journal International De Vitaminologie Et De Nutrition

Vitamin E and carotenoid pigments are important nutrients for the maintenance of health and protection of tissues against free radical damage. They also play a potential role in disease-risk-prediction and -protection, but little is known about their physiological and sociodemographic correlates and determinants, especially in a West African context. As part of a study of reproductive health in rural Gambian women, blood samples were obtained from 1286 women aged 15 to 54 years, living in the Farafenni area of The Gambia.

Author(s): 
Bates, Christopher J.
Matthews, Neal
West, Beryl
Morison, Linda
Walraven, Gijs
Publication Title: 
Antimicrobial Agents and Chemotherapy

The in vitro antimalarial activities of artemisone and artemisone entrapped in Pheroid vesicles were compared, as was their ability to induce dormancy in Plasmodium falciparum. There was no increase in the activity of artemisone entrapped in Pheroid vesicles against multidrug-resistant P. falciparum lines. Artemisone induced the formation of dormant ring stages similar to dihydroartemisinin. Thus, the Pheroid delivery system neither improved the activity of artemisone nor prevented the induction of dormant rings.

Author(s): 
Grobler, Lizette
Chavchich, Marina
Haynes, Richard K.
Edstein, Michael D.
Grobler, Anne F.
Publication Title: 
Phytomedicine: International Journal of Phytotherapy and Phytopharmacology

Hemidesmus indicus R. Br. (Asclepiadaceae) is a well known drug in Ayurveda system of medicine. In the present study, antioxidant activity of methanolic extract of H. indicus root bark was evaluated in several in vitro and ex vivo models. Further, preliminary phytochemical analysis and TLC fingerprint profile of the extract was established to characterize the extract which showed antioxidant properties. The in vitro and ex vivo antioxidant potential of root bark of H. indicus was evaluated in different systems viz.

Author(s): 
Ravishankara, M. N.
Shrivastava, Neeta
Padh, Harish
Rajani, M.
Publication Title: 
Diabetes

Diabetes is a major risk factor for premature atherosclerosis, and oxidative stress appears to be an important mechanism. Previously, we showed that diabetic monocytes produce increased superoxide anion (O(2)(-)), and alpha-tocopherol (AT) supplementation decreases this. The aim of this study was to elucidate the mechanism(s) of O(2)(-) release and inhibition by AT under hyperglycemic (HG) conditions in monocytes.

Author(s): 
Venugopal, Senthil Kumar
Devaraj, Sridevi
Yang, Teddy
Jialal, Ishwarlal
Publication Title: 
The American Journal of Clinical Nutrition

BACKGROUND: Concord grape juice (CGJ) is a rich source of flavonoids, which have greater antioxidant efficacy in vitro than does alpha-tocopherol; however, the efficacies of flavonoids and alpha-tocopherol in vivo have not been compared. OBJECTIVE: We compared the in vivo antioxidant efficacy of CGJ with that of alpha-tocopherol in healthy adults. DESIGN: Subjects were randomly assigned to receive either 400 IU RRR-alpha-tocopherol/d (n = 17) or 10 mL CGJ. kg(-1). d(-1) (n = 15) for 2 wk.

Author(s): 
O'Byrne, Dawn J.
Devaraj, Sridevi
Grundy, Scott M.
Jialal, Ishwarlal
Publication Title: 
The American Journal of Clinical Nutrition

BACKGROUND: Dietary plant sterols effectively reduce LDL cholesterol when incorporated into fat matrices. We showed previously that supplementation with orange juice containing plant sterols (2 g/d) significantly reduced LDL cholesterol. Inflammation is pivotal in atherosclerosis. High-sensitivity C-reactive protein (hs-CRP), the prototypic marker of inflammation, is a cardiovascular disease risk marker; however, there is a paucity of data on the effect of plant sterols on CRP concentrations.

Author(s): 
Devaraj, Sridevi
Autret, Bryce C.
Jialal, Ishwarlal
Publication Title: 
Molecular Aspects of Medicine

Natural vitamin E consists of four different tocopherol and four different tocotrienol homologues (alpha,beta, gamma, delta) that all have antioxidant activity. However, recent data indicate that the different vitamin E homologues also have biological activity unrelated to their antioxidant activity. In this review, we discuss the anti-inflammatory properties of the two major forms of vitamin E, alpha-tocopherol (alphaT) and gamma-tocopherol (gammaT), and discuss the potential molecular mechanisms involved in these effects.

Author(s): 
Reiter, Elke
Jiang, Qing
Christen, Stephan
Publication Title: 
The American Journal of Clinical Nutrition

BACKGROUND: Oxidative stress and inflammation are crucial in atherogenesis. alpha-Tocopherol is both an antioxidant and an antiinflammatory agent. OBJECTIVE: We evaluated the effect of RRR-alpha-tocopherol supplementation on carotid atherosclerosis in patients with stable coronary artery disease (CAD) on drug therapy. DESIGN: Randomized, controlled, double-blind trial compared RRR-alpha-tocopherol (1200 IU/d for 2 y) with placebo in 90 patients with CAD. Intimal medial thickness (IMT) of both carotid arteries was measured by high-resolution B-mode ultrasonography at 0, 1, 1.5, and 2 y.

Author(s): 
Devaraj, Sridevi
Tang, Rong
Adams-Huet, Beverley
Harris, Andrea
Seenivasan, Thanalakshmi
de Lemos, James A.
Jialal, Ishwarlal
Publication Title: 
Free Radical Biology & Medicine

Metabolic syndrome (MetS) is associated with increased incidence of diabetes and cardiovascular disease (CVD). Prospective clinical trials with alpha-tocopherol (AT) have not yielded positive results. Because AT supplementation decreases circulating gamma-tocopherol (GT), we evaluated supplementation with GT (800 mg/day), AT (800 mg/day), the combination or placebo for 6 weeks alone AT and GT concentrations, biomarkers of oxidative stress, and inflammation in subjects with MetS (n=20/group).

Author(s): 
Devaraj, Sridevi
Leonard, Scott
Traber, Maret G.
Jialal, Ishwarlal

Pages

Subscribe to RSS - alpha-Tocopherol