scholarly journals Enjoy Carefully: The Multifaceted Role of Vitamin E in Neuro-Nutrition

2021 ◽  
Vol 22 (18) ◽  
pp. 10087
Author(s):  
Liesa Regner-Nelke ◽  
Christopher Nelke ◽  
Christina B. Schroeter ◽  
Rainer Dziewas ◽  
Tobias Warnecke ◽  
...  
Keyword(s):  
Vitamin E ◽  
Neurodegenerative Disorders ◽  
Genetic Variants ◽  
Current Knowledge ◽  
Amyloid Β ◽  
Nutritional Profile ◽  
Randomized Controlled ◽  
Study Designs ◽  
Vitamin E Supplementation

Vitamin E is often associated with health benefits, such as antioxidant, anti-inflammatory and cholesterol-lowering effects. These properties make its supplementation a suitable therapeutic approach in neurodegenerative disorders, for example, Alzheimer’s or Parkinson’s disease. However, trials evaluating the effects of vitamin E supplementation are inconsistent. In randomized controlled trials, the observed associations often cannot be substantiated. This could be due to the wide variety of study designs regarding the dosage and duration of vitamin E supplementation. Furthermore, genetic variants can influence vitamin E uptake and/or metabolism, thereby distorting its overall effect. Recent studies also show adverse effects of vitamin E supplementation regarding Alzheimer’s disease due to the increased synthesis of amyloid β. These diverse effects may underline the inhomogeneous outcomes associated with its supplementation and argue for a more thoughtful usage of vitamin E. Specifically, the genetic and nutritional profile should be taken into consideration to identify suitable candidates who will benefit from supplementation. In this review, we will provide an overview of the current knowledge of vitamin E supplementation in neurodegenerative disease and give an outlook on individualized, sustainable neuro-nutrition, with a focus on vitamin E supplementation.

Microglia in Alzheimer’s Disease

2020 ◽  
Vol 17 (1) ◽  
pp. 29-43 ◽  
Author(s):  
Patrick Süß ◽  
Johannes C.M. Schlachetzki
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Neurodegenerative Disorder ◽  
Current Knowledge ◽  
Imaging Techniques ◽  
Amyloid Β ◽  
Disease Stage ◽  
Disease Modifying Therapy ◽  
Transcriptomic Signature

: Alzheimer’s Disease (AD) is the most frequent neurodegenerative disorder. Although proteinaceous aggregates of extracellular Amyloid-β (Aβ) and intracellular hyperphosphorylated microtubule- associated tau have long been identified as characteristic neuropathological hallmarks of AD, a disease- modifying therapy against these targets has not been successful. An emerging concept is that microglia, the innate immune cells of the brain, are major players in AD pathogenesis. Microglia are longlived tissue-resident professional phagocytes that survey and rapidly respond to changes in their microenvironment. Subpopulations of microglia cluster around Aβ plaques and adopt a transcriptomic signature specifically linked to neurodegeneration. A plethora of molecules and pathways associated with microglia function and dysfunction has been identified as important players in mediating neurodegeneration. However, whether microglia exert either beneficial or detrimental effects in AD pathology may depend on the disease stage. : In this review, we summarize the current knowledge about the stage-dependent role of microglia in AD, including recent insights from genetic and gene expression profiling studies as well as novel imaging techniques focusing on microglia in human AD pathology and AD mouse models.

Protective Effects of Vitamin E on Chemotherapy-Induced Peripheral Neuropathy: A Meta-Analysis of Randomized Controlled Trials

2020 ◽  
Author(s):  
Huikai Miao ◽  
Rongzhen Li ◽  
Dongni Chen ◽  
Jia Hu ◽  
Youfang Chen ◽  
...  
Keyword(s):  
Vitamin E ◽  
Peripheral Neuropathy ◽  
Randomized Controlled Trials ◽  
Lower Incidence ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Modest Improvement ◽  
Randomized Controlled ◽  
Significant Difference ◽  
Vitamin E Supplementation

Abstract Background Chemotherapy often causes chemotherapy-induced peripheral neuropathy (CIPN), but effective prevention measures are still lacking. Whether vitamin E can prevent peripheral neurotoxicity caused by chemotherapy is inconclusive. Therefore, we collected related randomized controlled trials (RCTs) and conducted a meta-analysis to examine whether vitamin E could prevent CIPN. Methods We searched PubMed, EMBASE and the Cochrane databases in November 2019 for eligible trials. Two reviewers conducted the analysis independently when studies were homogeneous enough. Results Eight RCTs, involving 555 patients, were identified. Upon pooling these RCTs, patients who received vitamin E supplementation of 600 mg/day had a significantly lower incidence of peripheral neuropathy (RR 0.31; 95% CI 0.14 to 0.65; P = 0.002) induced by chemotherapy compared with the placebo group. Vitamin E played a key role in decreasing the incidence of peripheral neuropathy in the cisplatin chemotherapy group (RR 0.28; 95% CI 0.14 to 0.54; P = 0.0001). With regard to improvements in sural amplitude, vitamin E supplementation significantly decreased patients’ sural amplitude after three rounds of chemotherapy (RR -2.66; 95% CI -5.09 to -0.24; P =0.03) in contrast with that of placebo supplementation, while no significant difference was observed when patients were treated with vitamin E after six rounds of chemotherapy. In addition, the vitamin E group had better improvement in the neurotoxicity score (RR -2.65; 95% CI -4.01to -1.29; P = 0.0001) and a lower incidence of reflexes and distal paraesthesias (RR 0.50; 95% CI 0.29 to 0.87; P = 0.01) compared to the control group. Conclusion Available data included in this meta-analysis showed that vitamin E supplementation can confer modest improvement in the prevention of CIPN. However, large-scale, well-designed RCTs are needed to confirm the exact role of vitamin E supplementation in the prevention of CIPN.

scholarly journals Role of Vitamin E for Nonalcoholic Steatohepatitis in Patients With Type 2 Diabetes: A Randomized Controlled Trial

Diabetes Care ◽  
2019 ◽  
Vol 42 (8) ◽  
pp. 1481-1488 ◽  
Author(s):  
Fernando Bril ◽  
Diane M. Biernacki ◽  
Srilaxmi Kalavalapalli ◽  
Romina Lomonaco ◽  
Sreevidya K. Subbarayan ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Randomized Controlled Trial ◽  
Vitamin E ◽  
Nonalcoholic Steatohepatitis ◽  
Controlled Trial ◽  
Randomized Controlled

Vitamin E in the neuroprotection of cisplatin induced peripheral neurotoxicity and ototoxicity

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 9114-9114 ◽  
Author(s):  
A. Pace ◽  
S. Carpano ◽  
E. Galiè ◽  
A. Savarese ◽  
M. Della Giulia ◽  
...  
Keyword(s):  
Placebo Group ◽  
Vitamin E ◽  
Peripheral Neurotoxicity ◽  
Double Blind ◽  
Multicentric Study ◽  
Phase Ii Studies ◽  
Significant Difference ◽  
Before And After ◽  
Vitamin E Supplementation

9114 Background: Peripheral neurotoxicity is a well recognized effect of cisplatin chemotherapy that can result in severe disability and represents a major dose-limiting factor. Several phase II studies have recently investigated the role of vitamin E as neuroprotectant in the prevention of cisplatin induced peripheral neurotoxicity and ototoxicity. Methods: An Italian randomized, placebo controlled, double blind multicentric study is ongoing to confirm the role of vitamin E supplementation in the prevention of neurotoxicity and ototoxicity induced by cisplatin Patients candidates to cisplatin chemotherapy were randomised to either vitamin E supplementation (a-tocopherol 400 mg/day) or to placebo. Patients were evaluated with neurological and neurophysiological examination before and after treatment. Neurotoxicity was measured using the comprehensive clinical and neurophysiological Total Neuropathy Score (TNS). Ototoxicity was evaluated with audiometric test and acoustic evoked potential before and after treatment. Results: 81 patients have been enrolled in 3 italian oncologic centers. An interim analysis on the first 50 patients was carried out. 25 patients (11 in the vit E group and 14 in the placebo group) received a cumulative dose higher than 300 mg/mq and were evaluable for neurotoxicity. Statistical analysis showed a significant difference (p < 0.05) in median neurotoxicity score observed in vit E group (TNS=1) respect to the placebo group (TNS=5). Conclusions: This is the first randomised, placebo controlled, double blind trial exploring the efficacy of vitamin E in the neuroprotection of cisplatin neurotoxicity. The results of this study confirm the neuroprotective effect of vitamin E supplementation against cisplatin-induced neurotoxicity. No significant financial relationships to disclose.

scholarly journals Role of the Plasma Membrane Transporter of Organic Cations OCT1 and Its Genetic Variants in Modern Liver Pharmacology

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Elisa Lozano ◽  
Elisa Herraez ◽  
Oscar Briz ◽  
Virginia S. Robledo ◽  
Jorge Hernandez-Iglesias ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Liver Cancer ◽  
Genetic Variants ◽  
Current Knowledge ◽  
Primary Liver Cancer ◽  
Target Cells ◽  
Target Tissue ◽  
Cationic Drugs ◽  
Drug Concentrations

Changes in the uptake of many drugs by the target cells may dramatically affect the pharmacological response. Thus, downregulation ofSLC22A1, which encodes the organic cation transporter type 1 (OCT1), may affect the response of healthy hepatocytes and liver cancer cells to cationic drugs, such as metformin and sorafenib, respectively. Moreover, the overall picture may be modified to a considerable extent by the preexistence or the appearance during the pathogenic process of genetic variants. Some rare OCT1 variants enhance transport activity, whereas other more frequent variants impair protein maturation, plasma membrane targeting or the function of this carrier, hence reducing intracellular active drug concentrations. Here, we review current knowledge of the role of OCT1 in modern liver pharmacology, which includes the use of cationic drugs to treat several diseases, some of them of great clinical relevance such as diabetes and primary liver cancer (cholangiocarcinoma and hepatocellular carcinoma). We conclude that modern pharmacology must consider the individual evaluation of OCT1 expression/function in the healthy liver and in the target tissue, particularly if this is a tumor, in order to predict the lack of response to cationic drugs and to be able to design individualized pharmacological treatments with the highest chances of success.

scholarly journals Role of Vitamin E in Pregnancy

2021 ◽  
Author(s):  
Mohd Aftab Siddiqui ◽  
Usama Ahmad ◽  
Asad Ali ◽  
Farogh Ahsan ◽  
Md. Faheem Haider
Keyword(s):  
Oxidative Stress ◽  
Immune System ◽  
Vitamin E ◽  
Pregnancy Complications ◽  
Blood Cells ◽  
Egg Quality ◽  
Healthy Skin ◽  
In Pregnancy ◽  
Vitamin E Supplementation

Vitamins play important roles in female health. They are essential for many functions, including menstruation and ovulation, oocyte (egg) quality and maturation. Vitamin E was first discovered in 1922 as a substance necessary for reproduction. It has become widely known as a powerful lipid-soluble antioxidant. There are various reports on the benefits of vitamin E on health in general. Vitamin E helps your body create and maintain red blood cells, healthy skin, eyes and strengthens your natural immune system. However, despite it being initially discovered as a vitamin necessary for reproduction, to date studies relating to its effects in this area are lacking. Vitamin E supplementation may help reduce the risk of pregnancy complications involving oxidative stress, such as pre-eclampsia. This chapter is written to provide a review of the known roles of vitamin E in pregnancy.

Sign in / Sign up

Export Citation Format

Share Document