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https://www.readbyqxmd.com/read/28212283/the-effects-of-tocotrienol-and-lovastatin-co-supplementation-on-bone-dynamic-histomorphometry-and-bone-morphogenetic-protein-2-expression-in-rats-with-estrogen-deficiency
#1
Kok-Yong Chin, Saif Abdul-Majeed, Norazlina Mohamed, Soelaiman Ima-Nirwana
Both tocotrienol and statins are suppressors of the mevalonate pathway. Supplementation of tocotrienol among statin users could potentially protect them against osteoporosis. This study aimed to compare the effects of tocotrienol and lovastatin co-supplementation with individual treatments on bone dynamic histomorphometric indices and bone morphogenetic protein-2 (BMP-2) gene expression in ovariectomized rats. Forty-eight female Sprague-Dawley rats were randomized equally into six groups. The baseline was sacrificed upon receipt...
February 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28165404/chromatographic-separation-of-vitamin-e-enantiomers
#2
REVIEW
Ju-Yen Fu, Thet-Thet Htar, Leanne De Silva, Doryn Meam-Yee Tan, Lay-Hong Chuah
Vitamin E is recognized as an essential vitamin since its discovery in 1922. Most vegetable oils contain a mixture of tocopherols and tocotrienols in the vitamin E composition. Structurally, tocopherols and tocotrienols share a similar chromanol ring and a side chain at the C-2 position. Owing to the three chiral centers in tocopherols, they can appear as eight different stereoisomers. Plant sources of tocopherol are naturally occurring in the form of RRR while synthetic tocopherols are usually in the form of all-racemic mixture...
February 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28145432/succinate-ester-derivative-of-%C3%AE-tocopherol-enhances-the-protective-effects-against-60-co-%C3%AE-ray-induced-hematopoietic-injury-through-granulocyte-colony-stimulating-factor-induction-in-mice
#3
Zhong-Tang Li, Li-Mei Wang, Li-Rong Yi, Chao Jia, Fan Bai, Ren-Jun Peng, Zu-Yin Yu, Guo-Lin Xiong, Shuang Xing, Ya-Jun Shan, Ri-Fang Yang, Jun-Xing Dong, Yu-Wen Cong
α-tocopherol succinate (α-TOS), γ-tocotrienol (GT3) and δ-tocotrienol (DT3) have drawn large attention due to their efficacy as radioprotective agents. α-TOS has been shown to act superior to α-tocopherol (α-TOH) in mice by reducing lethality following total body irradiation (TBI). Because α-TOS has been shown to act superior to α-tocopherol (α-TOH) in mice by reducing lethality following total body irradiation (TBI), we hypothesized succinate may be contribute to the radioprotection of α-TOS. To study the contributions of succinate and to identify stronger radioprotective agents, we synthesized α-, γ- and δ-TOS...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28137215/targeting-cancer-stem-cells-for-chemoprevention-of-pancreatic-cancer
#4
Dharmalingam Subramaniam, Gaurav Kaushik, Prasad Dandawate, Shrikant Anant
Pancreatic ductal adenocarcinoma is one of the deadliest cancers worldwide and the fourth leading cause of cancer-related deaths in United States. Regardless of the advances in molecular pathogenesis and consequential efforts to suppress the disease, this cancer remains a major health problem in United States. By 2030, the projection is that pancreatic cancer will be climb up to be the second leading cause of cancer-related deaths in the United States. Pancreatic cancer is a rapidly invasive and highly metastatic cancer, and does not respond to standard therapies...
January 26, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28135396/chemical-composition-analysis-sensory-and-feasibility-study-of-tree-peony-seed
#5
Yingyi Mao, Jigang Han, Fang Tian, Xue Tang, Yonghong Hu, Yan Guan
Eight wild species in Sect. Moutan DC (tree peony) of the genus Paeonia grown in natural habitats and 1 cultivated specie were investigated to analyze their fatty acid and bioactive phenolic compound profiles. For fatty acid composition, P. ludlowii contained the lowest α-linolenic acid (27.68%) and P. jishanensis contained the highest (51.96 %) content of the 9 species. For phenolic compounds, P. qiui contained the highest resveratrol (2.12 mg/g), P. delavayi contained the highest β-gentiobiosylpaeoniflorin (26...
January 30, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28095736/development-of-multifunctional-foods
#6
Koji Yamada
Foods contain various biologically active substances with extent physiological effects. Among them, some substances, such as dietary fibers, polyunsaturated fatty acids, and antioxidants, exert multiple activities. In addition, combinational uses of some components, such as sesamin and α-tocopherol, enhance their biological effects each other. The expression of multiple effect leads to the production of multifunctional foods which prevent the occurrence of various diseases. Furthermore, synergic effects between biologically active substances allow us to decrease the dose of each component, which lead to the improvement of safety and reduction of production cost of multifunctional foods...
January 18, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28093324/synthesis-characterization-and-in-vitro-antitumor-activity-of-the-polyethylene-glycol-350-and-1000-succinate-derivatives-of-the-tocopherol-and-tocotrienol-isomers-of-vitamin-e
#7
Ahmed Abu-Fayyad, Sami Nazzal
Vitamin E refers to a group of saturated tocopherol (T) isomers and the biologically more active unsaturated tocotrienol (T3) isomers. PEGylated α-tocopherol, commercially known as Vitamin E TPGS, has been used as an emulsifier and therapeutic agent for children with vitamin E deficiency. Limited information, however, is available about the PEG conjugates of the tocotrienol isomers of vitamin E. The current work was therefore undertaken to synthesize and characterize the water soluble polyethylene glycol (PEG 350 and 1000) derivatives of T and T3...
January 16, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28087759/separation-of-vitamin-e-on-a-100-%C3%A3-phenogel-column
#8
Salisa Chumsantea, Kornkanok Aryusuk, Supathra Lilitchan, Narumon Jeyashoke, Kanit Krisnangkura
The effect of π-electrons and hydroxyl group on the separations of vitamin E on a swelling-controlled polystyrene-divinylbenzene (Phenogel) column using toluene/isooctane as the mobile phase was investigated. The effect of the π-electrons was demonstrated in the baseline separation of α-tocopherol and α-tocotrienol on a 100-Å Phenogel column. In addition, baseline separation of α-, (β- + γ-)- and δ-tocopherol could be achieved on this column. The separation mechanism of these isomers are due to the difference in the interactions between the hydroxyl group on the chromanol ring of each tocopherol and the gel matrix caused by the steric hindrance of methyl group(s)...
February 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28056572/biochemical-characterization-anti-inflammatory-properties-and-ulcerogenic-traits-of-some-cold-pressed-oils-in-experimental-animals
#9
Faten M Ibrahim, Hanan Naeim Attia, Yousreya Aly Aly Maklad, Kawkab A Ahmed, Mohamed F Ramadan
CONTEXT: Cold-pressed oils (CPO) are commercially available in the market and characterized by their health-promoting properties. OBJECTIVE: Clove oil (CLO), coriander seed oil (COO) and black cumin oil (BCO) were evaluated for their bioactive lipids. Pharmacological screening was performed to evaluate acute toxicity, anti-inflammatory and ulcerogenic effects as well as histopathological changes in tissues of albino rats fed with CPO. MATERIALS AND METHODS: Fatty acids, tocols and total phenolics were analyzed...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28029115/development-of-orally-administered-%C3%AE-tocotrienol-gt3-nanoemulsion-for-radioprotection
#10
Grace A Ledet, Shukla Biswas, Vidya P Kumar, Richard A Graves, Demaurian M Mitchner, Taylor M Parker, Levon A Bostanian, Sanchita P Ghosh, Tarun K Mandal
The purpose of this study was two-fold: (1) to formulate γ-tocotrienol (GT3) in a nanoemulsion formulation as a prophylactic orally administered radioprotective agent; and (2) to optimize the storage conditions to preserve the structural integrity of both the formulation and the compound. γ-tocotrienol was incorporated into a nanoemulsion and lyophilized with lactose. Ultra performance liquid chromatography-mass spectroscopy (UPLC-MS) was used to monitor the chemical stability of GT3 over time, the particle size and ζ potential, and scanning electron microscopy (SEM) were used to study the physical stability of the nanoemulsion...
December 24, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28011809/safety-and-efficacy-of-tocotrienol-supplementation-for-bone-health-in-postmenopausal-women-protocol-for-a-dose-response-double-blinded-placebo-controlled-randomised-trial
#11
Chwan-Li Shen, Huanbiao Mo, Shengping Yang, Shu Wang, Carol K Felton, Michael D Tomison, Ima Nirwana Soelaiman
INTRODUCTION: Osteoporosis is a major health concern in postmenopausal women, and oxidative stress contributes to the development of bone loss. Cellular studies and ovariectomised rat model mimicking bone loss in postmenopausal women show the bone-protective effect of tocotrienols (TTs) with antioxidant capability. We aim to access the safety and efficacy of TT consumption for bone health in postmenopausal women. METHODS AND ANALYSIS: In this 12-week randomised double-blinded placebo-controlled trial for the effects of dietary TT supplementation in postmenopausal women, postmenopausal women aged 45 years and older with at least 1 year after menopause and bone mineral density T-score at the spine and/or hip 2...
December 23, 2016: BMJ Open
https://www.readbyqxmd.com/read/27993600/tumor-regression-after-intravenous-administration-of-targeted-vesicles-entrapping-the-vitamin-e-%C3%AE-tocotrienol
#12
Reatul Karim, Sukrut Somani, Majed Al Robaian, Margaret Mullin, Rumelo Amor, Gail McConnell, Christine Dufès
The therapeutic potential of tocotrienol, a member of the vitamin E family of compounds with potent in vitro anti-cancer properties, is limited by its inability to specifically reach tumors following intravenous administration. The purpose of this study is to determine whether a novel tumor-targeted vesicular formulation of tocotrienol would suppress the growth of A431 epidermoid carcinoma and B16-F10 melanoma in vitro and in vivo. In this work, we demonstrated that novel transferrin-bearing multilamellar vesicles entrapping α-T3 resulted in a dramatically improved (by at least 52-fold) therapeutic efficacy in vitro on A431 cell line, compared to the free drug...
December 18, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27983628/the-effects-of-annatto-tocotrienol-on-bone-biomechanical-strength-and-bone-calcium-content-in-an-animal-model-of-osteoporosis-due-to-testosterone-deficiency
#13
Kok-Yong Chin, Dhivakaran Gengatharan, Fadlin Sakina Mohd Nasru, Rehan Amalia Khairussam, Sherlyn Lai Hui Ern, Siti Aina Wahidah Aminuddin, Soelaiman Ima-Nirwana
Osteoporosis reduces the skeletal strength and increases the risk for fracture. It is an underdiagnosed disease in men. Annatto tocotrienol has been shown to improve bone structural indices and increase expression of bone formation genes in orchidectomized rats. This study aimed to evaluate the effects of annatto tocotrienol on biomechanical strength and calcium content of the bone in orchidectomized rats. Thirty three-month-old male Sprague-Dawley rats were randomly assigned to five groups. The baseline control (BC) group was sacrificed at the onset of the study...
December 14, 2016: Nutrients
https://www.readbyqxmd.com/read/27983595/genetic-variations-involved-in-vitamin-e-status
#14
REVIEW
Patrick Borel, Charles Desmarchelier
Vitamin E (VE) is the generic term for four tocopherols and four tocotrienols that exhibit the biological activity of α-tocopherol. VE status, which is usually estimated by measuring fasting blood VE concentration, is affected by numerous factors, such as dietary VE intake, VE absorption efficiency, and VE catabolism. Several of these factors are in turn modulated by genetic variations in genes encoding proteins involved in these factors. To identify these genetic variations, two strategies have been used: genome-wide association studies and candidate gene association studies...
December 13, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27960280/identification-of-a-genetic-factor-required-for-high-%C3%AE-isoform-concentration-in-rice-vitamin-e
#15
Daisuke Sekine, Kazumasa Murata, Toshiyuki Kimura, Kiyotaka Nakagawa, Teruo Miyazawa
The γ-isoforms of tocopherols (Tc) and tocotrienols (T3) possess high biological activities in comparison to the α-isoforms. The concentrations of Tc and T3 isoforms in rice (Oriza sativa) was cultivar-dependent. Using chromosome segment substitution lines (CSSLs) and near isogenic lines (NILs) of indica cultivar "Kasalath" in a japonica cultivar "Koshihikari" genetic background, the Kasalath genomic segment on chromosome 2 was determined to be responsible for the high γ-isoform concentration: γ-tocopherol methyltransferase (γ-TMT) was identified as a candidate gene...
December 14, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27928113/a-combination-of-%C3%AE-tocotrienol-and-ferulic-acid-synergistically-inhibits-telomerase-activity-in-dld-1-human-colorectal-adenocarcinoma-cells
#16
Takahiro Eitsuka, Naoto Tatewaki, Hiroshi Nishida, Kiyotaka Nakagawa, Teruo Miyazawa
Rice bran is a rich source of functional compounds, including tocotrienol (T3) and ferulic acid (FA). We previously investigated the anti-cancer properties of T3, and reported on the potent inhibitory effects of δ-T3 on angiogenesis and telomerase activity. In this study, we examined the synergistic suppressive effects of the combination of δ-T3 and FA on telomerase activity in DLD-1 human colorectal adenocarcinoma cells. Co-treatment with δ-T3 and FA significantly decreased cellular telomerase activity compared to treatment with δ-T3 alone, whereas FA alone had no inhibitory effect...
2016: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/27926612/inhibitory-effect-of-a-redox-silent-analogue-of-tocotrienol-on-hypoxia-adaptation-in-prostate-cancer-cells
#17
Nobuya Shiozawa, Ryosuke Sugahara, Kozue Namiki, Chiaki Sato, Akira Ando, Ayami Sato, Nantiga Virgona, Tomohiro Yano
Prostate cancer (PCa) is one of the most common cancers in Western countries and acquires a malignant phenotype, androgen-independent growth. PCa under hypoxia often has resistance to chemotherapy and radiotherapy. However, an effective therapy against PCa under hypoxia has not yet been established. In this report, we investigated the inhibitory effect of a redox-silent analogue of tocotrienol on the survival of a human androgen-independent PCa cell line (PC3) under hypoxia. We found that the redox-silent analogue exerted a cytotoxic effect on PC3 cells in a dose-dependent manner irrespective of either hypoxia or normoxia...
March 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/27904039/role-of-rac1-wave2-signaling-in-mediating-the-inhibitory-effects-of-%C3%AE-tocotrienol-on-mammary-cancer-cell-migration-and-invasion
#18
Ibrahim Gayadh Algayadh, Venkateshwararao Dronamraju, Paul William Sylvester
The majority of breast cancer deaths result from the progression of this disease to a metastatic phenotype. Rac1 and Cdc42 are Rho family members that together with their downstream effectors, Wiskott-Aldrich Syndrome protein-family verprolin-homologous protein 2 (WAVE2) and Arp2/3, play an important role in cytoskeletal reorganization and the formation of membrane protrusions that promote cancer cell migration and invasion. γ-Tocotrienol, is a natural isoform within the vitamin E family of compounds that inhibits breast cancer cell growth and progression by suppressing various signaling pathways involved in mitogenic signaling and metastatic progression...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903918/reactive-oxygen-species-in-hevea-brasiliensis-latex-and-relevance-to-tapping-panel-dryness
#19
REVIEW
Yi Zhang, Julie Leclercq, Pascal Montoro
Environmental stress can lead to oxidative stress resulting from an increase in reactive oxygen species (ROS) and involves redox adjustments. Natural rubber is synthesized in laticifers, which is a non-photosynthetic tissue particularly prone to oxidative stress. This paper reviews the current state of knowledge on the ROS production and ROS-scavenging systems in laticifers. These regulations have been the subject of intense research into a physiological syndrome, called Tapping Panel Dryness (TPD), affecting latex production in Hevea brasiliensis In order to prevent TPD occurrence, monitoring thiol content appeared to be a crucial factor of latex diagnosis...
November 29, 2016: Tree Physiology
https://www.readbyqxmd.com/read/27899927/regulation-of-on-tree-vitamin-e-biosynthesis-in-olive-fruit-during-successive-growing-years-the-impact-of-fruit-development-and-environmental-cues
#20
Egli C Georgiadou, Vlasios Goulas, Thessaloniki Ntourou, George A Manganaris, Panagiotis Kalaitzis, Vasileios Fotopoulos
The term vitamin E refers to a group of eight lipophilic compounds known as tocochromanols. The tocochromanols are divided into two groups, that is, tocopherols and tocotrienols, with four forms each, namely α-, β-, γ-, and δ-. In order to explore the temporal biosynthesis of tocochromanols in olive (Olea europaea cv. 'Koroneiki') fruit during on-tree development and ripening over successive growing years, a combined array of analytical, molecular, bioinformatic, immunoblotting, and antioxidant techniques were employed...
2016: Frontiers in Plant Science
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