Vitamin E Acetate Research Articles

Quality Control of Vitamins A and E and Coenzyme Q10 in Commercial Anti-Ageing Cosmetic Products

Vitamins A and E and coenzyme Q10 are common ingredients in anti-ageing cosmetic products. Within this study, we evaluated the quality of commercial cosmetics with vitamin A (35 products), vitamin E (49 products), and coenzyme Q10 (27 products) by using validated HPLC–UV methods. Vitamin A was determined as retinol, retinyl palmitate, retinyl propionate, β carotene, and hydroxypinacolone retinoate in concentrations ranging from 950 ng/g to 19 mg/g. Total vitamin A contents, expressed with retinol equivalents, ranged from 160 ng/g to 19 mg/g, and were above the maximum concentration recommended by the SCCS in six of the 35 tested cosmetics. The content-related quality control of 10 cosmetics with specified vitamin A content revealed significant deviations (between 0% and 400%) of the label claim. Vitamin E was determined as both tocopherol and tocopheryl acetate in concentrations between 8.5 µg/g and 16 mg/g. Coenzyme Q10 was determined as ubiquinone in 24 tested cosmetics, which labelled it, in concentrations between 4.2 µg/g and 100 µg/g. Labelling irregularities were observed in all three active compound groups, resulting in a significant share (42%) of improperly labelled cosmetic products. The results of this study reveal the need for stricter cosmetics regulation and highlight the importance of their quality control, especially by evaluating the contents of the active compounds, in their efficacy and safety assurance.

Physicochemical Characteristics and HPLC Determination of Alpha-Tocopherol in Eighteen Edible Vegetable Oils Marketed in Nigeria

Eighteen brands of vegetable oils available in the local market were extracted with n-hexane before analysis for alpha-tocopherol by RP-HPLC method. The chromatographic separation occurred isocratically with methanol-water [96:4%v/v] at 0.9 ml/min flow rate. Tocopheryl acetate was the internal standard and alpha-tocopherol was eluted at 7.87 min. Free fatty acids value [FFAVs], peroxide value [PV], iodine value [IV] and saponification values [SV] were determined as quality parameters. Calibration curve was linear [r2 0.9969] and the method was precise with relative standard deviation of 0.35% and mean recovery, 87.39%. Alpha-tocopherol concentration ranged from 0-9.22 mg/100g with the highest in Tropical sunflower oil [9.22 mg/100g] and the lowest [1.16 mg/100g] in Laziz oil. Alpha-tocopherol was not detected in unbranded, local palm oil. The calculated percentage daily value [% DV] of vitamin E ranged from 0- 8.60%. Significant difference [p<0.05] between % DV and recommended dietary allowance [RDA] of vitamin E was observed. FFAs and PV ranged from 0.11-0.74% and 0.99-11.55 meq/kg while IV and SV ranged from 26.71-37.03 g/100g and 4.14-43.68 mg KOH/g, respectively. Seventeen samples [94%] were found to be within the acceptable limits while one [6%], failed for both quality parameters and α-tocopherol test. Strict regulatory control is advocated for these oils to safeguard the public health.
 Dhaka Univ. J. Pharm. Sci. 20(1): 49-57, 2021 (June)

Alpha-tocopherol acetate and alpha lipoic acid may mitigate the development of wooden breast myopathy in broilers at an early age

ABSTRACT 1. The objective of this study was to identify the effects of the antioxidant alpha-tocopherol acetate (ATA) and alpha lipoic acid (ALA) which have anti-inflammatory effects on developmental onset, severity and the progression of wooden breast (WB) based on Pectoralis major (P. major) muscle morphology and expression of genes associated with WB during the first three weeks post-hatch. 2. A total of 160 newly hatched Ross 708 broiler chicks were randomly assigned in a replicated trial to either a control group or three dietary treatments (ATA 160 mg/kg feed, ALA 500 mg/kg feed or in combination). 3. Microscopic changes associated with WB began at one week of age in all groups. The ATA acetate and ALA fed in combination decreased WB severity at two weeks of age (P = 0.05) and ATA alone or in combination reduced severity at three weeks of age compared to the control group (P = 0.05). Expression of myogenic determination factor 1 and peroxisome proliferator-activated receptor gamma was reduced in all dietary treatments compared to the control at three weeks of age (P ≤ 0.05), which suggested reduced muscle degeneration and lipid deposition. 4. ATA and ALA fed both independently and in combination had a positive effect on mitigating WB severity microscopically as early as two weeks of age.

Antioxidant activity of some promising fatty oils: comparative study <i>in vitro</i>

This paper presents the results of the comparative study of the in vitro antioxidant activity of fatty oils obtained by cold-pressing (black cumin, argania prickly, olive oil) which are promising for the use in medical practice. An oil solution of alpha-tocopherol acetate was also used as a comparison. Antioxidant activity was determined by registration of chemiluminescence on the device HLM-003 in systems simulating the production of reactive oxygen species and lipid peroxidation. The study revealed the ability of most samples of the investigated fatty oils to inhibit the generation of reactive oxygen species and lipid peroxidation in model systems in vitro which characterized their antioxidant properties in the comparative aspect with the reference preparation. Samples of black cumin fatty oil showed the greatest antioxidant activity. The optimum fatty oil concentrations for each model system (1 mg/ml and 5 mg/ml) were also selected and the dose-dependent effect on the oil concentration in the system was established.

EFFECT OF THE PHYSALIS PERUVIANA AND LINUM USITATISSIMUM EXTRACTS AGAINST TOLUENE-INDUCED OXIDATIVE DAMAGES IN KIDNEY AND LIVER TISSUES OF RATS

. Toluen, causes a great environmental problem because it is widely used in the industry. This study was intended to examine the effect of goldenberry, Physalis peruviana (PP) and flaxseed, Linum usitatissimum (LU) extracts on the malondialdehyde (MDA), reduced glutathione (GSH) fatty acid and lipophilic vitamin content in the kidney and liver tissue of Sprague Dawley male rats which were oxidative stressed by toluene. PP and LU were extracted and subjected to vitamin and flavonoid analyses. The rats were divided into four groups as control (C), toluene (T), toluene + P. peruviana (T + PP), toluene + L. usitatissimum (T + LU). T was injected intraperitoneally at a concentration of 0.3 mL/kg. In addition, PP and LU were also injected intraperitoneally at a concentration of 0.5 mL/kg. The treatment was maintained for two months. The rats were decapitated and tissues were removed. Tissue samples were homogenized using buffer solutions. MDA, GSH, lipophilic vitamin, cholesterol and fatty acid content was determined. MDA and GSH concentration were significantly high and low in all toluene-treated groups, respectively (p<0.001). GSH level increased and the MDA concentration decreased in PP and LU treated groups (p<0.01). The palmitic (C16:0), stearic (C18:0), oleic (C18:n-9), docosahexaenoic (C22:6n-3) and arachidonic (C20:4n-6) acid concentrations were mainly higher in the kidney and liver tissues collected from the PP and LU treated groups than those collected from the control group. The K1, delta-tocopherol and alfa–tocopherol acetate vitamin concentrations were higher in PP and LU treated groups than those at group treated with the toxin group. The measured concentrations were similar to those measured in the control group. PP and LU decreased the cholesterol concentration in the kidney and liver tissues (p<0.05 and 0.01, respectively). Our results indicate that antioxidant defense systems of toluene groups have decreased. PP and LU possessed a protective feature against the oxidative stress caused by toluen.

Preparation of liposomes composed of supercritical carbon dioxide-philic phospholipids using the rapid expansion of supercritical solution process

The synthesis of supercritical carbon dioxide-philic phospholipids allowed the vitamin E acetate (VEA) liposomes composed of them to be successfully prepared using the rapid expansion of supercritical solution (RESS) process without any organic solvent. The single-factor analysis and the response surface methodology combined with Box–Behnken design were used to optimize the operation conditions. The results indicated that pressure was the most important factor to the encapsulation efficiency of the liposomes, which was increased with a higher pressure. Temperature and mass ratio also had some effects, while the interaction of the three factors was not significant. The liposomes prepared under the optimal conditions (i.e., temperature of 55.45 °C, pressure of 25.00 MPa, and mass ratio of 6.35:1) showed good stability as well as the slow and continuous release behavior. The encapsulation efficiency, average particle size, PDI, and zeta-potential of the prepared liposomes were 92.84 ± 0.98%, 247.4 ± 6.5 nm, 0.295 ± 0.012, and −42.55 ± 0.64 mV, respectively.

Toxicological assessment of e‐cigarette or vaping product use associated lung injury (EVALI) cartridges and constituents

Rationale Definitive causative agents of the outbreak associated with the use of e-cigarette, or vaping product use associated lung injury (EVALI) are unknown. Patients diagnosed with EVALI have used vape products containing tetrahydrocannabinol (THC) and vitamin E acetate (VEA). Hypothesis We hypothesized that inhalation of these EVALI vape cartridges and their constituents induce pulmonary toxicity, mediated by oxidative damage and inflammatory responses, leading to acute lung injury, and alters SARS-CoV-2 related proteins. Methods Vaping products were recovered from hospitalized patients at the University of Rochester Medical Center. Cartridge constituents were characterized by gas chromatography and mass spectrometry. Comparative toxicity of exposure to common vape cartridge components such as medium-chain triglyceride (MCT) oil, VEA, and patient-derived cartridge aerosols was assessed by in vitro and in vivo models. Lung epithelial cells (BEAS-2B) and monocytes (Mono-Mac-6). Cells were exposed to MCT, VEA, and cartridge aerosols and the elicited inflammatory response, barrier function, and lipid-laden index were determined. C57BL/6 mice were exposed to MCT, VEA, and vape cartridge aerosols for three days (1 hr/day). The immune response was determined by differential cell counts, cytokine milieu, and lipidomics analysis in bronchoalveolar lavage fluid (BALF). Lung surfactant protein (SP-A), SARS-CoV-2 proteins (ACE2 and TMPRSS2) were quantified in the lung homogenates. Results Constituents identified patient-derived vaping products included reactive hydrocarbons and various forms of cannabinoids. VEA and cartridge aerosols induced significantly increased IL-6 and IL-8 responses in lung epithelial cells and monocytes. MCT, VEA, and cartridge aerosols induced barrier dysfunction. Increased lipid-laden indices were observed in MM6 cells. In mice, acute exposure to cartridge aerosols caused a significant infiltration of leukocytes in BALF and increased IL-6, eotaxin, and G-CSF in the BALF. Lipidomics analysis showed significantly increased eicosanoid inflammatory mediators and leukotrienes. Reduced levels of SP-A levels were seen in lung homogenates. Exposure to cartridge aerosols showed the most significant effects and toxicity compared to MCT and VEA. SARS-CoV-2 related proteins were not affected. Conclusion Acute exposure to vape cartridges induces cytotoxicity, barrier dysfunction, and elicit an inflammatory response in lung cells and mice, which are potential predictive toxicological markers of EVALI. Toxicity of vape cartridges was independent of SARS-CoV-2 proteins. This study provides important identification of potential chemical constituents, toxicological responses, and potential biomarkers of EVALI.

Modulation of CD36‐mediated Lipid Accumulation and Senescence by Vitamin E Analogues in Monocytes and Macrophages

The CD36/FAT scavenger receptor/fatty acids transporter regulates cellular lipid accumulation important for inflammation, atherosclerosis, lipotoxicity and initiation of cellular senescence. During stress-induced premature senescence (SIPS), a number of stimuli (e.g., oxLDL, β-amyloid and 4-hydroxynonenal) may lead to up-regulation of CD36-mediated lipid uptake triggering signaling and the expression of lipid-regulating and inflammatory genes involved in the senescence-associated secretory phenotype (SASP) characterized by secretion of cytokines, chemokines, lipids and proteases. Both, SIPS and SASP may be modulated by vitamin E (alpha-tocopherol, αT), since it inhibits CD36 expression, cell surface exposition and CD36-associated signaling. Here we compared the regulatory effects of αT, αTP (alpha-tocopheryl phosphate, αTP) and αTP/βCD (a nanocarrier complex between αTP and β-cyclodextrin (βCD)) and investigated their regulatory effects on lipid accumulation, phagocytosis and senescence in THP-1 monocytes and macrophages. Both, αTP and αTP/βCD inhibited CD36 surface exposition stronger that αT leading to more pronounced CD36-mediated events such as inhibition of DiI-labelled oxLDL uptake, phagocytosis of fluorescent Staphylococcus aureus bioparticles, and cell proliferation. When compared to βCD, the complex of αTP/βCD extracted cholesterol from cellular membranes with higher efficiency and was associated with delivery of αTP to the cells, thus forming a Dual-Action Lipid-lowering complex (DALC). Interestingly, both, αTP and more so αTP/βCD inhibited lysosomal senescent-associated beta-galactosidase (SA-β-gal) activity and increased lysosomal pH, suggesting CD36-mediated uptake into the endo-lysosomal phagocytic compartment. Accordingly, the observed pH increase was more pronounced with αTP/βCD in macrophages when compared to monocytes, possibly due to their increased ability to phagocytose the αTP/βCD complex, whereas no significant change of pH occurred with αT, alpha-tocopherol acetate (αTA) or βCD. In contrast to αT and αTA, the αTP molecule is di-anionic at neutral pH (calculated pKa1 1.64 and pKa2 6.07), but upon moving into the acidic endo-lysosomal compartment becomes protonated and thus is acting as a base. Moreover, it is expected to be retained in lysosomes since it still carries one negative charge, as it occurs also with lysosomotropic drugs such as chloroquine and hydroxychloroquine. Thus, treatment with αTP or αTP/βCD and/or inhibition of conversion of αTP to αT as it occurs in aged cells may counteract CD36-mediated overlapping inflammatory, senescent, and atherosclerotic events.

Assessment of the Technological Properties of Idebenone and Tocopheryl Acetate Co-Loaded Lipid Nanoparticles

Several liquid lipids have been proposed to obtain nanostructured lipid carriers (NLC) with improved efficiency. An attractive strategy is the use of oils that could elicit a synergic effect with the loaded drug. In this work, different percentages (0–4% w/w) of tocopheryl acetate (TA), an oily antioxidant, were used as liquid lipid to prepare NLC loading idebenone (IDE), a synthetic antioxidant investigated for the treatment of neurodegenerative and topical diseases. The technological properties of such NLC were evaluated, as well as the interactions among lipid core components. Loading different percentages of IDE (1–4% w/w) into NLC containing TA up to 4% w/w, no significant change of mean size and polydispersity index was observed. IDE loading capacity was 4% w/w but NLC containing IDE percentages greater than 1.5% w/w showed poor stability during long-term storage. Differential scanning calorimetry analyses highlighted linear relationships between peak temperature and TA percentages, while the enthalpy variation and recrystallization index values showed that increasing the percentage of TA led to less crystalline structure of the NLC core. Therefore, NLC co-loading IDE and TA could be useful to design new delivery systems for the treatment of diseases that could benefit from the co-administration of these antioxidants.

α-Tocopherol Attenuates Oxidative Phosphorylation of CD34+ Cells, Enhances Their G0 Phase Fraction and Promotes Hematopoietic Stem and Primitive Progenitor Cell Maintenance.

Alpha tocopherol acetate (αTOA) is an analogue of alpha tocopherol (αTOC) that exists in the form of an injectable drug. In the context of the metabolic hypothesis of stem cells, we studied the impact of αTOA on the metabolic energetic profile and functional properties of hematopoietic stem and progenitor cells. In ex vivo experiments performed on cord blood CD34+ cells, we found that αTOA effectively attenuates oxidative phosphorylation without affecting the glycolysis rate. This effect concerns complex I and complex II of the mitochondrial respiratory chain and is related to the relatively late increase (3 days) in ROS (Reactive Oxygen Species). The most interesting effect was the inhibition of Hypoxia-Inducible Factor (HIF)-2α (Hexpression, which is a determinant of the most pronounced biological effect—the accumulation of CD34+ cells in the G0 phase of the cell cycle. In parallel, better maintenance of the primitive stem cell activity was revealed by the expansion seen in secondary cultures (higher production of colony forming cells (CFC) and Severe Combined Immunodeficiency-mice (scid)-repopulating cells (SRC)). While the presence of αTOA enhanced the maintenance of Hematopoietic Stem Cells (HSC) and contained their proliferation ex vivo, whether it could play the same role in vivo remained unknown. Creating αTOC deficiency via a vitamin E-free diet in mice, we found an accelerated proliferation of CFC and an expanded compartment of LSK (lineagenegative Sca-1+cKit+) and SLAM (cells expressing Signaling Lymphocytic Activation Molecule family receptors) bone marrow cell populations whose in vivo repopulating capacity was decreased. These in vivo data are in favor of our hypothesis that αTOC may have a physiological role in the maintenance of stem cells. Taking into account that αTOC also exhibits an effect on proliferative capacity, it may also be relevant for the ex vivo manipulation of hematopoietic stem cells. For this purpose, low non-toxic doses of αTOA should be used.

Interventions Preventing Vaginitis, Vaginal Atrophy after Brachytherapy or Radiotherapy Due to Malignant Tumors of the Female Reproductive Organs-A Systematic Review.

Background: Radiotherapy, as a method of treatment of cervical and uterine cancers, may induce severe late-onset vaginal side effects. Unfortunately, little evidence on the management of adverse effects has been presented. This study aimed to evaluate the available interventions which reduce symptoms of vaginitis and vaginal atrophy by improving dyspareunia, mucosal inflammation, vaginal pH and vaginal dryness in women who have undergone brachytherapy or radiotherapy due to uterine or cervical malignancies. Materials and methods: A comprehensive literature search was performed following PRISMA guidelines. The systematic search was conducted using electronic databases, namely Scopus, Web of Science and PubMed, between October and November 2020 to identify randomized controlled trials (RCT) and, prospective randomized studies (PRS). Results: The analyzed population consists of 376 patients with uterine or cervical cancer, treated with hyaluronic acid, vitamin A, vitamin E, alpha-tocopherol acetate and dienestrol. Intervention with HA along with vitamin A and vitamin E revealed advantage in endpoints such as reduced dyspareunia, vaginal mucosal inflammation, vaginal dryness, bleeding, fibrosis and cellular atypia. Administration of alpha-tocopherol acetate reduced vaginal mucosal inflammation and improved vaginal acanthosis, whereas dienestrol resulted in reduced dyspareunia, vaginal caliber and bleeding. Conclusions: Vaginal suppositories were found to be clinically effective at the management of late-onset vulvovaginal side effects after radiotherapy.

Assessment of a feed additive consisting of all‐rac‐alpha tocopheryl acetate (vitamin E) for all animal species for the renewal of its authorisation (DSM)

Following a request from the European Commission, the EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the assessment of the application for renewal of authorisation of all-rac-alpha tocopheryl acetate (vitamin E) as a feed additive for all animal species. The applicant provided data demonstrating that the additive currently in the market complies with the conditions of authorisation. The FEEDAP Panel confirms that the use of all-rac-alpha-tocopheryl acetate under the current authorised conditions of use is safe for the target species, the consumers and the environment. No concern for user safety is expected from the use of the active substance however, due to the lack of information, the FEEDAP Panel is not able to conclude on its skin sensitisation potential. To draw conclusions on the safety for the user of the final formulated additives, specific studies would be required. There is no need to assess the efficacy of all-rac-alpha-tocopheryl acetate in the context of the renewal of the authorisation.

Assessment of a feed additive consisting of all-rac-alpha tocopheryl acetate (vitamin E) for all animal species for the renewal of its authorisation (EUROPE-ASIA Import Export GmbH).

Following a request from the European Commission, the EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the assessment of the application for renewal of authorisation of all‐rac‐alpha tocopheryl acetate (vitamin E) as a feed additive for all animal species. The applicant provided data demonstrating that the additive currently in the market complies with the conditions of authorisation. The FEEDAP Panel confirms that the use of all‐rac‐alpha‐tocopheryl acetate under the current authorised conditions of use is safe for the target species, the consumers and the environment. No concern for user safety is expected from the use of the active substance; however, due to the lack of information, the FEEDAP Panel is not able to conclude on its skin sensitisation potential. To draw conclusions on the safety for the user of the final formulated additives, specific studies would be required. There is no need to assess the efficacy of all‐rac‐alpha‐tocopheryl acetate in the context of the renewal of the authorisation.

Assessment of a feed additive consisting of all-rac-alpha tocopheryl acetate (vitamin E) for all animal species for the renewal of its authorisation (BASF SE).

Following a request from the European Commission, the EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the assessment of the application for renewal of authorisation of all‐rac‐alpha‐tocopheryl acetate (vitamin E) as a feed additive for all animal species. The applicant provided data demonstrating that the additive currently in the market complies with the conditions of authorisation. The FEEDAP Panel confirms that the use of all‐rac‐alpha‐tocopheryl acetate under the current authorised conditions of use is safe for the target species, the consumers and the environment. No concern for user safety is expected from the use of the active substance however, due to the lack of information, the FEEDAP Panel is not able to conclude on its skin sensitisation potential. To draw conclusions on the safety for the user of the final formulated additives, specific studies would be required. There is no need to assess the efficacy of all‐rac‐alpha‐tocopheryl acetate in the context of the renewal of the authorisation.

Common Kilka oil and its primary and secondary oxidative dynamics stabilized by different variants of clove essential oil

The objective of this study was to investigate the properties of clove essential oil extracted by different microwave-assisted methods and to evaluate its effects on the stability of common Kilka oil. Each of these methods was hypothesized to yield a clove essential oil that would have a distinguishable composition and effect when added to common Kilka oil by maintaining its oxidative stability. The oxidation of common Kilka oil was examined by accelerated oxidation using the active oxygen method and Rancimat test. The clove essential oil extracted by microwave-assisted hydrodistillation showed the highest induction period according to the active oxygen method (16.56 h) and the Rancimat induction period (3.64 h) in common Kilka oil and its antioxidant activity was comparable to that of BHT (16.59 h and 4.34 h, respectively) and tocopheryl acetate (16.30 h and 4.02 h, respectively). Furthermore, the microwaveassisted hydrodistillation method resulted in the amount of eugenol that exhibited the highest antioxidant capacity for preserving PUFA in common Kilka oil. Ultimately, clove essential oil can become an efficient natural antioxidant for the oxidative stability of common Kilka oil.

Liquid chromatography-tandem mass spectrometry method for measuring vitamin E acetate in bronchoalveolar lavage fluid

We investigated the suitability of isotope-dilution liquid chromatography coupled with tandem mass spectrometry for identifying vitamin E acetate (VEA) in bronchoalveolar lavage (BAL) fluid. This new method demonstrates high accuracy, selectivity, and sensitivity, with mean recoveries higher than 90%, coefficients of variation ranging from 1.5% to 4.5%, and a limit of detection of 1.10 ng/mL. Calibration curves were linear (R2 > 0.99). The linear range and detection limit of the method were adequate for identifying VEA in 48 of 51 BAL fluid samples collected from people with lung injury resulting from e-cigarettes, or vaping, product use. We conclude that this method is an effective tool for studying VEA accumulation in lungs caused by using e-cigarettes, or vaping, products that contain VEA.

Supplementation Effect of Oleuropein Extract Combined with Betaine, Magnesium, and Vitamin E on Pigs' Performance and Meat Quality Characteristics.

Simple SummaryOleuropein, betaine, magnesium, and vitamin E show antioxidant and/or metabolic effects on the organism that are reflected, in many cases, in performances and meat quality. This study evaluated whether the combination of these nutrients at two doses manifest different effects on the final product. Both combinations were enough to improve the oxidative status of pigs, although performances were not affected. However, the higher doses increased n-6 and n-3 PUFA in the triglycerides and free fatty acid fractions that resulted in meat that was more susceptible to oxidation.This study evaluates the effect of the dietary combination of oleuropein extract (1200 mg/kg) and betaine (1000 mg/kg), magnesium oxide (600 mg/kg), and α–tocopheryl acetate (400 mg/kg), or a half-dose of these compounds, on pigs’ performance, oxidative status, and meat quality characteristics (drip loss, TBARS, and texture and fatty acid profile of intramuscular fat). Sixty-six barrows and females were slaughtered at 120 kg of BW. Performance and carcass yield were not changed by treatments. The high-dose mixture resulted in higher serum ferric reducing/antioxidant power (p = 0.0026), lower glucose (p = 0.03) and a tendency to have lower serum TBARS (p = 0.07) when compared to control. Percentage of drip loss, moisture content, intramuscular fat, or texture parameters were not modified by dietary treatments. Pigs supplemented with the high-dose mixture had higher PUFA (p = 0.0001), n-6 (p = 0.0001), n-3 (p = 0.0095) and lower MUFA (p = 0.0064) in the neutral lipid fraction of intramuscular fat. Free PUFA, mainly n-3 fatty acids (p = 0.0009), were also higher in the meat of pigs fed the high-dose mixture compared with the others. A higher mobilization (neutral to free fatty acids hydrolysis) of n-3 and MUFA fatty acids in the muscle from pigs fed the high-dose mixture was observed. However, dietary mixture supplementation tended to increase MUFA (p = 0.056) and decrease the total PUFA (p = 0.0074) proportions in muscle polar lipids. This specific fatty acid composition of meat from pigs supplemented with the high-dose mixture could be responsible for the higher meat lipid oxidation observed in this group when compared to the other groups. Consequently, the low-dose mixture would be more adequate for maintaining the oxidative status of pigs and, meat lipid stability.

Compiling Evidence for EVALI: A Scoping Review of In Vivo Pulmonary Effects After Inhaling Vitamin E or Vitamin E Acetate.

Vitamin E acetate (VEA) has come under significant scrutiny due to its association with E-cigarette or vaping product use-associated lung injury (EVALI). Various theoretical mechanisms have been proposed for toxicity, including tocopherol (vitamin E)-mediated surfactant damage, recruitment of inflammation, and pyrolysis of acetate to the pulmonary irritant ketene. Characterize studies in mammals evaluating inhaled VEA, vitamin E analogues, or pyrolyzed acetate that describe subsequent effects on the lung. Research in all languages from time of inception to October 1, 2020, regarding mammals (human or animal) exposed to inhaled vitamin E analogues, or any compound containing acetate administered via inhalation after pyrolysis, and subsequent description of pulmonary effect. Ovid MEDLINE, Scopus, and Web of Science Core Collection. In total, 786 unique articles were identified. After duplicate reviewer screening, 16 articles were eligible for inclusion. Tocopherol was evaluated in 68.8% (11/16) of the studies, VEA in 18.8% (3/16), and both VEA and tocopherol were evaluated in 12.5% (2/16). Of the five studies evaluating VEA, it was given by pyrolysis in 60.0% (3/5). No human studies were identified. All included trials were conducted on non-human mammals: 75.0% (12/16) rodent models and 25.0% (4/16) sheep models. Outcomes assessed were heterogeneous and included 57 unique outcomes. Several questions still exist regarding the pulmonary toxicity of inhaled tocopherol and VEA. More studies are needed to determine whether tocopherol alone (i.e., without acetate) can cause pulmonary injury. Additionally, further studies of VEA should evaluate the impact that pyrolysis and co-administration with other compounds, such as tetrahydrocannabinol, have on the toxic potential of VEA.

Determination of Vitamin E (α-Tocopherol Acetate) on the Surface of Human Skin by IR Fourier-Transform Spectrometry and Study of Some Aspects of Its Transdermal Transfer

Possibilities of using FTIR spectrometry for determining organic substances on the surface of human skin and studying some aspects of the transdermal transfer of cosmetic products from the surface to the inner layers of skin were considered. Vitamin E as alpha-tocopherol acetate was selected as a cosmetic product under study. A procedure for determining changes in the concentration of vitamin E over time was proposed, sampling using standard tablets of potassium bromide was used, and a dependence illustrating a decrease in the concentration of the cosmetic product over time was obtained. It was shown that FTIR spectrometry can be used as a simple and rapid method for studying mechanisms of substance transfer and transdermal properties of the skin.

α-Tocopherol Acetate Attenuates Mitochondrial Oxygen Consumption and Maintains Primitive Cells within Mesenchymal Stromal Cell Population.

We present here the data showing, in standard cultures exposed to atmospheric O2 concentration, that alpha-tocopherol acetate (α-TOA) has a positive impact on primitive cells inside mesenchymal stromal cell (MstroC) population, by maintaining their proliferative capacity. α-TOA decreases the O2 consumption rate of MStroC probably by impacting respiratory chain complex II activity. This action, however, is not associated with a compensatory increase in glycolysis activity, in spite of the fact that the degradation of HIF-1α was decreased in presence of α-TOA. This is in line with a moderate enhancement of mtROS upon α-TOA treatment. However, the absence of glycolysis stimulation implies the inactivity of HIF-1α which might - if it were active - be related to the maintenance of stemness. It should be stressed that α-TOA might act directly on the gene expression as well as the mtROS themselves, which remains to be elucidated. Alpha-tocopherol acetate (α-TOA), a synthetic vitamin E ester, attenuates electron flow through electron transport chain (ETC) which is probably associated with a moderate increase in mtROS in Mesenchymal Stromal Cells. α-TOA action results in enhancement of the proliferative capacity and maintenance of the differentiation potential of the mesenchymal stem and progenitor cells.