Vitamin E chemistry, biological activity and benefits on the skin

Author(s):  
R. Cassano
1961 ◽  
Vol 5 (4) ◽  
pp. 309-315 ◽  
Author(s):  
B.Connor Johnson ◽  
Quincy Crider ◽  
C.H. Shunk ◽  
B.O. Linn ◽  
E.L. Wong ◽  
...  

2001 ◽  
Vol 85 (05) ◽  
pp. 766-770 ◽  
Author(s):  
Fausta Micheletta ◽  
Luigi Iuliano ◽  
Francesco Violi

SummaryVitamin E, a major lipid-soluble, chain-breaking antioxidant includes several tocopherols having the biological activity of RRR-alpha-tocopherol. Vitamin E circulates in the blood as free tocopherol bound to beta-lipoproteins and is present in cell membrane where it exerts a potent defence against lipid peroxidation (1). Blood concentration of vitamin E in humans ranges from 25 to 30 μM, depending on daily intake and body’s ability to absorb fat (1). In the last decade the scientific interest on biological activity of vitamin E increased because of a growing body of evidence linking this vitamin with atherosclerosis and its complications (2). Thus, the oxidative hypothesis of atherosclerosis suggests that LDL accumulates within vessel wall, in particular in the macrophages, as a consequence of its oxidative modification mediated by resident cells (3, 4). A reduced defence against LDL oxidation could favour this process and accelerate atherosclerotic progression. Accordingly, patients with coronary heart disease have lower plasma concentration of vitamin E than controls (2) and prospective studies demonstrated that a daily assumption of vitamin E reduces cardiovascular events (5). According to the oxidative hypothesis of atherosclerosis, this effect has been attributed to the inhibition of LDL oxidation. Alternative mechanism potentially implicated in the antiatherosclerotic activity of vitamin E includes its interference with the activity of platelet and monocyte, in which the intracellular redox status plays an important functional role (6, 7). As platelets and monocytes are both involved in the pathophysiologic process leading to atherosclerotic lesion, the interference of vitamin E with the biological function of these cells may represent another important tool to explore the anti-atherosclerotic activity of vitamin E. This review will focus on the open issues related to the use of vitamin E in clinical studies and the potential usefulness in investigating platelet function and clotting activation in patients treated with vitamin E.


2020 ◽  
Vol 11 (5) ◽  
pp. 3800-3810
Author(s):  
Yang Li ◽  
Diqiong Wang ◽  
Shuang Zhang ◽  
Mingming Zhong ◽  
Chengbin Zhao ◽  
...  

Ultrasonically modified soybean lipophilic protein has improved solubility and emulsifying properties, which are advantageous for preparing emulsions that improve the bioavailability of vitamin E while protecting its biological activity.


2021 ◽  
Vol 66 (1) ◽  
Author(s):  
Jimmy Josué Ceballos-Cruz ◽  
Jean-Jacques Hélesbeux ◽  
Guillaume Viault ◽  
Denis Séraphin ◽  
Gumersindo Mirón-López ◽  
...  

Abstract. Chalcone-vitamin E hybrids 6’-O-tosyl-3,4,5-trimethoxy-δ-tocopherol-chalcone (1), 3,4,5-trimethoxy-δ-tocopherol-chalcone (2), 6’-O-tosyl-3,4,5-trimethoxy-δ-tocopherol-retrochalcone (3) and 3,4,5-trimethoxy-δ-tocopherol-retrochalcone (4) were synthesized as part of a search for new biological activities in these types of derivatives. We report herein on the photoisomerization products of hybrids 1-4, and the effects of the solvent and substitution patterns in producing secondary products such as flavanone 6, 3-deoxyanthocyanidin 8, and hemiketal 10. Photochemically-induced changes are considered important since structural modifications and/or the presence of additional products can affect the biological activity of this type of semisynthetic hybrids.   Resumen. Los híbridos de chalcona-vitamina E, 6’-O-tosil-3,4,5-trimetoxi-δ-tocoferol-chalcona (1), 3,4,5-trimetoxi-δ-tocoferol-chalcona (2), 6’-O-tosil-3,4,5-trimetoxi-δ-tocoferol-retrochalcona (3) y 3,4,5-trimetoxi-δ-tocoferol-retrochalcona (4), fueron sintetizados como parte de la búsqueda de nuevos perfiles de actividad biológica para este tipo de derivados. En este trabajo reportamos los productos de fotoisomerización de los híbridos 1-4, y los efectos del disolvente, así como de distintos patrones de sustitución en la generación de productos secundarios como la flavanona 6, la 3-deoxiantocianidina 8, y el hemicetal 10. Los cambios fotoinducidos son considerados de gran importancia debido a que la modificación en la estructura y/o la presencia de productos adicionales puede afectar la actividad biológica de este tipo de híbridos semisintéticos.


2000 ◽  
Vol 72 (1) ◽  
pp. 201-202 ◽  
Author(s):  
Herbert J Kayden ◽  
Thomas Wisniewski

2020 ◽  
Vol 100 (11) ◽  
pp. 4319-4328
Author(s):  
Tengfei Zhan ◽  
Yunsheng Han ◽  
Chaohua Tang ◽  
Qingyu Zhao ◽  
Dandan Sun ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document