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Takasu S, Watanabe R, Sugito N, Morikawa K, Iio A, Esaka Y, Akao Y. Unveiling the vitamin E profile in rice bran extracellular vesicles: evaluation of extraction and preparation methods. ANAL SCI 2024; 40:935-941. [PMID: 38556585 DOI: 10.1007/s44211-024-00550-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/27/2024] [Indexed: 04/02/2024]
Abstract
Extracellular vesicles (EVs) are nanoscale entities secreted by various cells, encapsulating various nucleic acids and proteins that play important roles in cellular activities. Although rice bran is known for its richness in phytochemicals such as tocopherol and tocotrienol, the distribution of these compounds within EVs has not been extensively studied. The objective of this study was to detect and analyze the presence of vitamin E in EVs extracted from rice bran. We investigated several EV extraction methods, including rotation, vortex mixing, and ultrasonication, followed by post-extraction techniques such as ultracentrifugation, ultrafiltration, and lyophilization. Vitamin E in the EVs from rice bran was analyzed using LC-FLD. This study is the first to identify tocopherol and tocotrienol in rice bran-derived EVs. Our results indicate that ultracentrifugation followed by rotation is the most effective method for the preparation of rice bran-derived EVs. Notably, the vitamin E profile in EVs varies depending on the preparation method and differs from that in rice bran extracts. The pronounced presence of vitamin E in EVs suggests unique pharmacokinetics and underscores the potential of EVs as carriers for drug delivery systems. This study not only confirms the presence of vitamin E in EVs, but also underscores the potential of EVs and their phytochemical content for therapeutic applications.
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Affiliation(s)
- Soo Takasu
- Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu, 501-1196, Japan
| | - Risa Watanabe
- Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu, 501-1196, Japan
| | - Nobuhiko Sugito
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Kohei Morikawa
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Akio Iio
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan
| | - Yukihiro Esaka
- Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu, 501-1196, Japan.
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
| | - Yukihiro Akao
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan
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Konda AR, Gelli M, Pedersen C, Cahoon RE, Zhang C, Obata T, Cahoon EB. Vitamin E biofortification: Maximizing oilseed tocotrienol and total vitamin E tocochromanol production by use of metabolic bypass combinations. Metab Eng 2023; 79:66-77. [PMID: 37429412 DOI: 10.1016/j.ymben.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/20/2023] [Accepted: 06/20/2023] [Indexed: 07/12/2023]
Abstract
Vitamin E tocochromanols are generated in plants by prenylation of homogentisate using geranylgeranyl diphosphate (GGDP) for tocotrienol biosynthesis and phytyl diphosphate (PDP) for tocopherol biosynthesis. Homogentisate geranylgeranyl transferase (HGGT), which uses GGDP for prenylation, is a proven target for oilseed tocochromanol biofortification that effectively bypasses the chlorophyll-linked pathway that limits PDP for vitamin E biosynthesis. In this report, we explored the feasibility of maximizing tocochromanol production in the oilseed crop camelina (Camelina sativa) by combining seed-specific HGGT expression with increased biosynthesis and/or reduced homogentisate catabolism. Plastid-targeted Escherichia coli TyrA-encoded chorismate mutase/prephenate dehydrogenase and Arabidopsis hydroxyphenylpyruvate dioxygenase (HPPD) cDNA were co-expressed in seeds to bypass feedback-regulated steps and increase flux into homogentisate biosynthesis. Homogentisate catabolism was also suppressed by seed-specific RNAi of the gene for homogentisate oxygenase (HGO), which initiates homogentisate degradation. In the absence of HGGT expression, tocochromanols were increased by ∼2.5-fold with HPPD/TyrA co-expression, and ∼1.4-fold with HGO suppression compared to levels in non-transformed seeds. No further increase in tocochromanols was observed in HPPD/TyrA lines with the addition of HGO RNAi. HGGT expression alone increased tocochromanol concentrations in seeds by ∼four-fold to ≤1400 μg/g seed weight. When combined with HPPD/TyrA co-expression, we obtained an additional three-fold increase in tocochromanol concentrations indicating that homogentisate concentrations limit HGGT's capacity for maximal tocochromanol production. The addition of HGO RNAi further increased tocochromanol concentrations to 5000 μg/g seed weight, an unprecedented tocochromanol concentration in an engineered oilseed. Metabolomic data obtained from engineered seeds provide insights into phenotypic changes associated with "extreme" tocochromanol production.
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Affiliation(s)
- Anji Reddy Konda
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588 USA; USA
| | - Malleswari Gelli
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Connor Pedersen
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588 USA; USA
| | - Rebecca E Cahoon
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588 USA; USA
| | - Chunyu Zhang
- National Key Laboratory of Crop Genetic Improvement and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Toshihiro Obata
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588 USA; USA
| | - Edgar B Cahoon
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588 USA; USA.
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Ekeuku SO, Etim EP, Pang KL, Chin KY, Mai CW. Vitamin E in the management of pancreatic cancer: A scoping review. World J Gastrointest Oncol 2023; 15:943-958. [PMID: 37389119 PMCID: PMC10302993 DOI: 10.4251/wjgo.v15.i6.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/03/2023] [Accepted: 04/07/2023] [Indexed: 06/14/2023] Open
Abstract
Pancreatic cancer is the leading cause of cancer mortality worldwide. Research investigating effective management strategies for pancreatic cancer is ongoing. Vitamin E, consisting of both tocopherol and tocotrienol, has demonstrated debatable effects on pancreatic cancer cells. Therefore, this scoping review aims to summarize the effects of vitamin E on pancreatic cancer. In October 2022, a literature search was conducted using PubMed and Scopus since their inception. Original studies on the effects of vitamin E on pancreatic cancer, including cell cultures, animal models and human clinical trials, were considered for this review. The literature search found 75 articles on this topic, but only 24 articles met the inclusion criteria. The available evidence showed that vitamin E modulated proliferation, cell death, angiogenesis, metastasis and inflammation in pancreatic cancer cells. However, the safety and bioavailability concerns remain to be answered with more extensive preclinical and clinical studies. More in-depth analysis is necessary to investigate further the role of vitamin E in the management of pancreatic cancers.
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Affiliation(s)
- Sophia Ogechi Ekeuku
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Effiong Paul Etim
- Faculty of Applied Sciences, UCSI University, Kuala Lumpur 56000, Malaysia
| | - Kok-Lun Pang
- Newcastle University Medicine Malaysia, Iskandar Puteri 79200, Johor, Malaysia
| | - Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Chun-Wai Mai
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, UCSI University, Kuala Lumpur 56000, Malaysia
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Gupta L, Sood PK, Nehru B, Sharma S. Ameliorative Effect of Palm Oil in Aluminum Lactate Induced Biochemical and Histological Implications in Rat Brain. Biol Trace Elem Res 2023; 201:2843-2853. [PMID: 35869376 DOI: 10.1007/s12011-022-03366-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 07/15/2022] [Indexed: 11/28/2022]
Abstract
α-Tocotrienol is one of the major constituents of palm oil. It is a well-known antioxidant and cholesterol-lowering neuroprotectant. To prevent the initiation of Alzheimer's like symptoms, much attention has been shifted to the major role played by antioxidants. Previous epidemiological reports correlate the increasing incidence of developing Alzheimer's disease (AD), to the aluminum (Al) content in drinking water. Al, being a ubiquitous element, has a long history of being particularly reactive towards multiple aspects of neurobiology. So, the current study examines the effect of Al-induced behavioral, biochemical, and histopathological changes in rat brain; and the ameliorative effect of palm oil in reducing the resulting neurotoxicity. The experimental design consisted of 4 groups: control group which received rodent chow diet and water ad libitum; Al group received aluminum lactate (50 mg/kg bw); Al + palm oil group was administered with Al (50 mg/kg bw) and palm oil (60 mg/kg bw); and palm oil group received palm oil (60 mg/kg bw). Al was given by oral gavage once daily for 6 weeks and palm oil was administered intraperitoneally. After 6 weeks of supplementation, Al + palm oil group showed significantly lower malondialdehyde (MDA) content, but higher superoxide dismutase (SOD), catalase (CAT), GST, and GPx activity as compared to Al group. Al group has significantly higher level of MDA content, but lower SOD, CAT, GST, and GPx activity as compared to control group. In conclusion, this study suggested that palm oil was effective in preventing the Al-induced brain damage in rats.
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Affiliation(s)
- Liza Gupta
- Department of Biophysics, Panjab University, Chandigarh, India
| | | | - Bimla Nehru
- Department of Biophysics, Panjab University, Chandigarh, India
| | - Sheetal Sharma
- Department of Biophysics, Panjab University, Chandigarh, India.
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Iguchi N, Dönmez Mİ, Malykhina AP, Wilcox DT. Anti-fibrotic effect of tocotrienols for bladder dysfunction due to partial bladder outlet obstruction. Investig Clin Urol 2023; 64:189-196. [PMID: 36882179 PMCID: PMC9995959 DOI: 10.4111/icu.20220328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/20/2022] [Accepted: 01/11/2023] [Indexed: 02/16/2023] Open
Abstract
PURPOSE To investigate potential beneficial effects of tocotrienols which have been suggested to inhibit hypoxia-inducible factor (HIF) pathway, on partial bladder outlet obstruction (PBOO)-induced bladder pathology. MATERIALS AND METHODS PBOO was surgically created in juvenile male mice. Sham-operated mice were used as controls. Animals received daily oral administration of either tocotrienols (T3) or soybean oil (SBO, vehicle) from day 0 to 13 post-surgery. Bladder function was examined in vivo by void spot assay. At 2 weeks post-surgery, the bladders were subjected to physiological evaluation of detrusor contractility in vitro using bladder strips, histology by H&E staining and collagen imaging, and gene expression analyses by quantitative PCR. RESULTS A significant increase in the number of small voids was observed after 1 week of PBOO compared to the control groups. At 2 weeks post-surgery, PBOO+SBO mice showed a further increase in the number of small voids, which was not observed in PBOO+T3 group. PBOO-induced decrease in detrusor contractility was similar between two treatments. PBOO induced bladder hypertrophy to the same degree in both SBO and T3 treatment groups, however, fibrosis in the bladder was significantly less prominent in the T3 group than the SBO group following PBOO (1.8- vs. 3.0-fold increase in collagen content compared to the control). Enhanced levels of HIF target genes in the bladders were observed in PBOO+SBO group, but not in PBOO+T3 group compared to the control. CONCLUSIONS Oral tocotrienol treatment reduced the progression of urinary frequency and bladder fibrosis by suppressing HIF pathways triggered by PBOO.
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Affiliation(s)
- Nao Iguchi
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, Aurora, CO, USA
| | - M İrfan Dönmez
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, Aurora, CO, USA.,Division of Pediatric Urology, Department of Urology, Istanbul University Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Anna P Malykhina
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, Aurora, CO, USA
| | - Duncan T Wilcox
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, Aurora, CO, USA.,Department of Pediatric Urology, Children's Hospital Colorado, Aurora, CO, USA.
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Siger A, Górnaś P. Free tocopherols and tocotrienols in 82 plant species' oil: Chemotaxonomic relation as demonstrated by PCA and HCA. Food Res Int 2023; 164:112386. [PMID: 36737971 DOI: 10.1016/j.foodres.2022.112386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/13/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
The tocopherol (T) and tocotrienol (T3) profile were investigated in the present study for four hundred and eighteen plant oil samples, including thirty-one families, eighty-two species, and five cross-species. Fifteen species were dominated by tocotrienols, while sixty-seven - by tocopherols. The mean proportion of γ-T was almost half of the total tocochromanol content (49.3%) in the investigated samples, while α-T constituted to one quarter (25.0%), and the remaining other tocochromanols were present as minor constituents. A strong relationship between the taxonomic plant origin and the presence of the characteristic tocochromanol profile in oils obtained from those plants was noted. This is the first study to demonstrate that not only monocotyledonous, but also dicotyledons families can be rich in tocotrienols. The usefulness of statistical tools - principal component analysis (PCA) and hierarchical cluster analysis (HCA) for plant sample discrimination based on their tocochromanol profile was also shown.
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Chiba R, Urano Y, Noguchi N. α-Tocopherol suppresses 24(S)-hydroxycholesterol-induced cell death via inhibition of endoplasmic reticulum membrane disruption. Steroids 2023; 189:109136. [PMID: 36351491 DOI: 10.1016/j.steroids.2022.109136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/08/2022] [Accepted: 11/02/2022] [Indexed: 11/08/2022]
Abstract
The brain-specific cholesterol metabolite 24(S)-hydroxycholesterol (24S-OHC) has been shown to cause neuronal cell death when subjected to esterification by acyl-CoA:cholesterol acyltransferase 1 (ACAT1). Accumulating 24S-OHC esters in the endoplasmic reticulum (ER) provoked ER membrane disruption and an integrated stress response (ISR), a signaling pathway that regulates adaptation to various stresses. We have previously reported that α-tocopherol (α-Toc) but not α-tocotrienol (α-Toc3), among vitamin E homologs, suppressed 24S-OHC-induced cell death without affecting ACAT1 activity in human neuroblastoma SH-SY5Y cells. However, the precise mechanisms underlying the inhibitory activity of α-Toc have yet to be elucidated. In the present study, we aimed to investigate the effects of α-Toc on the 24S-OHC-induced cell death machinery. We showed that α-Toc, but not α Toc3, suppressed 24S-OHC-induced ISR and downstream eukaryotic translation initiator factor 2α (eIF2α) phosphorylation. We also found that α-Toc inhibited stress granule formation and robust downregulation of nascent protein synthesis, which were induced by 24S-OHC treatment. Furthermore, disruption of ER membrane integrity was suppressed by α-Toc, but not by α-Toc3. Our findings suggest that the inhibitory effects of α-Toc on 24S-OHC-induced cell death may be attributed to its protective function against ER membrane disruption.
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Affiliation(s)
- Ren Chiba
- From the Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Yasuomi Urano
- From the Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan.
| | - Noriko Noguchi
- From the Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan.
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Gore AJ, Bhagwat SS. Separation of tocol (tocopherol & tocotrienol) and phytosterols from palm fatty acid distillate by saponification and purification by low temperature solvent crystallization. J Food Sci Technol 2022; 59:2962-2971. [PMID: 35872719 PMCID: PMC9304468 DOI: 10.1007/s13197-022-05402-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/24/2022] [Accepted: 02/09/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED The tocotrienols (T3) are the vitamin E family members with excellent antioxidant properties and prevent autocatalytic lipid peroxidation. Palm Fatty Acid Distillate (PFAD) is a volatile organic material obtained during palm oil refining and consists of tocol (α-tocopherol/T, α, γ, β, and δ- tocotrienol/T3) up to 0.8% and represents a potential source for recovering these valuable compounds. Various methods have been studied to extract vitamin E; however, only a few are commercially available. To fulfil the need for technology for recovering these minor components, leaching the tocotrienol from solidified PFAD was carried out. In this study, the fatty acid of PFAD was saponified using NaHCO3/Ca(OH)2 and extracted the unsaponifiable fraction using solvent. Further, fraction was purified by low temperature solvent based crystallization using hexane at 5 ± 1.0 °C for 24 h and removed sterol. The best determined parameters like reaction time (30 min), the ratio of PFAD to Ca(OH)2 (1,w/w), reaction temperature (30 °C) and stirring speed 300 rpm were yielded up to 98.6% fatty acid conversion to calcium soap and extraction with hexane obtained higher concentration of tocol (28.1%). The sterol separated from the tocol rich fraction by low temperature solvent crystallization contains up to 37.1% of phytosterol (β-sitosterol) concentration. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13197-022-05402-7.
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Affiliation(s)
- Amol Jayavant Gore
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 400019 India
| | - Sunil Subhash Bhagwat
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 400019 India
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Teo CWL, Png SJY, Ung YW, Yap WN. Therapeutic effects of intranasal tocotrienol-rich fraction on rhinitis symptoms in platelet-activating factor induced allergic rhinitis. Allergy Asthma Clin Immunol 2022; 18:52. [PMID: 35698169 PMCID: PMC9195334 DOI: 10.1186/s13223-022-00695-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 05/30/2022] [Indexed: 12/22/2022] Open
Abstract
Background Platelet-activating factor (PAF) has been suggested to be a potent inflammatory mediator in Allergic rhinitis (AR) pathogenesis. Vitamin E, an essential nutrient that comprises tocopherol and tocotrienol, is known as a potential therapeutic agent for airway allergic inflammation. This study aimed to investigate the beneficial effects of intranasal Tocotrienol-rich fraction (TRF) on PAF-induced AR in a rat model. Methods Sprague Dawley rats were randomly assigned into 3 groups: Control, PAF-induced AR and PAF-induced AR with TRF treatment. To induce AR, 50 μl of 16 μg/ml PAF was nasally instilled into each nostril. From day 1 to 7 after AR induction, 10 μl of 16 μg/μl TRF was delivered intranasally to the TRF treatment group. Complete upper skulls were collected for histopathological evaluation on day 8. Results The average severity scores of AR were significantly higher in the PAF-induced AR rats compared to both control and PAF-induced AR with TRF treatment. The histologic examination of the nasal structures showed moderate degree of inflammation and polymorphonuclear cells infiltration in the lamina propria, mucosa damage and vascular congestion in the PAF-induced AR rats. TRF was able to ameliorate the AR symptoms by restoring the nasal structures back to normal. H&E staining demonstrated a statistically significant benefit upon TRF treatment, where minimal degree of inflammation, and a reduction in the infiltration of polymorphonuclear cells, mucosa damage and vascular congestion were observed. Conclusion TRF exhibited symptomatic relief action in AR potentially due to its antioxidant, anti-inflammatory and anti-allergic properties.
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Affiliation(s)
- Cheryl Wei Ling Teo
- Research and Development Department, Davos Life Science, 3 Biopolis Drive, #04-19, Synapse, 138623, Singapore, Singapore. .,Research and Development Department, KL-Kepong Oleomas (KLK Oleo), Level 8, Menara KLK, No 1, Jalan PJU 7/6, Mutiara Damansara, 47810, Petaling Jaya, Selangor, Malaysia.
| | - Stephanie Jia Ying Png
- School of Biological Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
| | - Yee Wei Ung
- Research and Development Department, KL-Kepong Oleomas (KLK Oleo), Level 8, Menara KLK, No 1, Jalan PJU 7/6, Mutiara Damansara, 47810, Petaling Jaya, Selangor, Malaysia
| | - Wei Ney Yap
- Research and Development Department, Davos Life Science, 3 Biopolis Drive, #04-19, Synapse, 138623, Singapore, Singapore.,Research and Development Department, KL-Kepong Oleomas (KLK Oleo), Level 8, Menara KLK, No 1, Jalan PJU 7/6, Mutiara Damansara, 47810, Petaling Jaya, Selangor, Malaysia
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Abstract
Natural forms of vitamin E comprise four tocopherols and four tocotrienols. During the last twenty years, there have been breakthroughs in our understanding of vitamin E metabolism and biological activities of vitamin E metabolites. Research has established that tocopherols and tocotrienols are metabolized via ω-hydroxylase (CYP4F2)-initiated side chain oxidation to form 13'-hydroxychromanol and 13'-carobyxychromanol (13'-COOH). 13'-COOHs are further metabolized via β-oxidation and sulfation to intermediate carboxychromanols, terminal metabolite carboxyethyl-hydroxychroman (CEHC), and sulfated analogs. Animal and human studies show that γ-, δ-tocopherol and tocotrienols are more extensively metabolized than α-tocopherol (αT), as indicated by higher formation of CEHCs and 13'-COOHs from non-αT forms than those from αT. 13'-COOHs are shown to be inhibitors of cyclooxygenase-1/-2 and 5-lipoxygenase and much stronger than CEHCs for these activities. 13'-COOHs inhibit cancer cell growth, modulate cellular lipids and activate peroxisome proliferator-activated receptor-γ and pregnane X receptor. Consistent with mechanistic findings, αT-13'-COOH or δTE-13'-COOH, respective metabolites of αT or δ-tocotrienol, show anti-inflammatory and cancer-preventive effects, modulates the gut microbiota and prevents β-amyloid formation in mice. Therefore, 13'-COOHs are a new class of bioactive compounds with anti-inflammatory and anti-cancer activities and potentially capable of modulating lipid and drug metabolism. Based on the existing evidence, this author proposes that metabolites may contribute to disease-preventing effects of γ-, δ-tocopherol and tocotrienols. The role of metabolites in αT's actions may be somewhat limited considering controlled metabolism of αT because of its association with tocopherol-transport protein and less catabolism by CYP4F2 than other vitamin E forms.
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Affiliation(s)
- Qing Jiang
- Department of Nutrition Science, Purdue University, IN, 47907, West Lafayette, USA.
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11
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Abstract
The early history of vitamin E from its discovery by Herbert M. Evans and Katharine J. S. Bishop in 1922 up to its chemical synthesis by Paul Karrer and coworkers in 1938 and the development of the concept that vitamin E acts as an antioxidant in vivo are recalled. Some more recent results shedding doubt on this hypothesis are reviewed. They comprise influence of vitamin E on enzyme activities, signaling cascades, gene expression and bio-membrane structure. The overall conclusion is that our knowledge of the vitamin's mechanism of action still remains fragmentary. The metabolism of tocopherols and tocotrienols is presented and discussed in respect to bioactivity of the metabolites, interference with drug metabolism and the future design of clinical trials. Some strategies are recommended how to reach the final goal: the identification of the primary vitamin E target(s) and the analysis of the downstream events up to the physiological phenomena.
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Affiliation(s)
- Regina Brigelius-Flohé
- German Institute of Human Nutrition Potsdam Rehbrücke, Arthur-Scheunert-Alle 114-116, 14558, Nuthetal, Germany.
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12
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Suzuki A, Urano Y, Ishida T, Noguchi N. Different functions of vitamin E homologues in the various types of cell death induced by oxysterols. Free Radic Biol Med 2021; 176:356-365. [PMID: 34648906 DOI: 10.1016/j.freeradbiomed.2021.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 01/18/2023]
Abstract
24(S)-Hydroxycholesterol (24S-OHC) and 25-hydroxycholesterol (25-OHC) are produced by cholesterol 24-hydroxylase and cholesterol 25-hydroxylase, respectively. The purpose of the present study was to determine the type of cell death induced by these oxysterols in neuronal cells, hepatic cells, and keratinocytes, and to elucidate the inhibitory effect of vitamin E homologues on various types of cell death. In human neuronal cells (SH-SY5Y cells), 24S-OHC and 25-OHC caused a cell death that was independent of caspase activation. We reported previously that the esterification of 24S-OHC by acyl-CoA:cholesterol acyltransferase 1 (ACAT1) and the resulting formation of a lipid droplet (LD)-like structure are responsible for the 24S-OHC-induced neuronal cell death. Here, we found that 25-OHC also induced ACAT1-mediated 25-OHC esterification and LD formation in neuronal cells. 25-OHC-induced cell death was inhibited by α-tocopherol (α-Toc) but not by α-tocotrienol (α-Toc3), as observed for 24S-OHC-induced cell death in SH-SY5Y cells. In human hepatic cells (HepG2 cells), these oxysterols caused a cell death that was caspase- and oxysterol-esterification-independent. This cell death was suppressed by both α-Toc and α-Toc3, suggesting the involvement of free-radical-mediated lipid peroxidation in the cell death induced by these oxysterols in hepatic cells. In human keratinocytes (HaCaT cells), these oxysterols caused a caspase-dependent but oxysterol-esterification-independent cell death that was inhibited by α-Toc but not by α-Toc3. These results suggest that α-Toc and α-Toc3 act as radical-scavenging antioxidants against oxysterol-induced cell death in the same way in hepatic cells, whereas their behavior is different in inhibition of cell death in neuronal cells and keratinocytes. Collectively, these results demonstrated that 24S-OHC and 25-OHC induced the same type of cell death in each of the cell types examined, and that α-Toc and α-Toc3 exerted different effects, depending on the type of cell death.
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Affiliation(s)
- Atsuki Suzuki
- Systems Life Sciences Laboratory, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto, 610-0394, Japan
| | - Yasuomi Urano
- Systems Life Sciences Laboratory, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto, 610-0394, Japan
| | - Tomohisa Ishida
- Systems Life Sciences Laboratory, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto, 610-0394, Japan
| | - Noriko Noguchi
- Systems Life Sciences Laboratory, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto, 610-0394, Japan.
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Saito Y. Diverse cytoprotective actions of vitamin E isoforms- role as peroxyl radical scavengers and complementary functions with selenoproteins. Free Radic Biol Med 2021; 175:121-129. [PMID: 34481936 DOI: 10.1016/j.freeradbiomed.2021.08.234] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 02/05/2023]
Abstract
Vitamin E, a generic term for tocopherol (T) and tocotrienol (T3), is one of the most potent lipid-soluble antioxidants in the body. It is classified into T and T3 based on the difference in the side chain structure. T and T3 have four isoforms: α-, β-, γ-, and δ, which have different chroman rings. Both T and T3 exhibit a similar ability to scavenge free radicals, and the extent of this ability depends on the difference in the chroman structure. However, they display unique cytoprotective activities in cultured cells depending on the difference in the side chain structure. The cytoprotective effects of vitamin E have received much attention in the prevention of ferroptosis, which is a distinct form of cell death involving iron-dependent lipid peroxidation. This review focuses on the cytoprotective actions of vitamin E isoforms against oxidative stress, particularly the difference between T and T3 and its relation to cellular uptake and distribution. Moreover, the molecular mechanism for cytoprotection of vitamin E oxidation products is explained, and the complementary role of vitamin E and selenoproteins to prevent lipid peroxidation and ferroptosis is described. Furthermore, the evaluation of vitamin E's radical scavenging activity in vivo using oxidative stress markers is discussed, particularly based on kinetic data and the physiological molar ratio of vitamin E to substrates, and the limited role of vitamin E as a peroxyl radical scavenger is described. The future directions and unresolved issues related to vitamin E and lipid peroxidation are also discussed.
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Affiliation(s)
- Yoshiro Saito
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University C301, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
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Shichiri M, Ishida N, Aoki Y, Koike T, Hagihara Y. Stress-activated leukocyte 12/15-lipoxygenase metabolite enhances struggle behaviour and tocotrienols relieve stress-induced behaviour alteration. Free Radic Biol Med 2021; 175:171-183. [PMID: 34474105 DOI: 10.1016/j.freeradbiomed.2021.08.236] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/05/2021] [Accepted: 08/11/2021] [Indexed: 11/22/2022]
Abstract
Stress induces emotional arousal causing anxiety, irritability, exaggerated startle behaviour, and hypervigilance observed in patients with trauma and stress-related mental disorders, including acute stress disorder and post-traumatic stress disorder. Central norepinephrine release promotes stress-induced emotional arousal. However, the regulator of emotional arousal remains unknown. Here, we show that the arachidonate-derived metabolite produced by stress-activated leukocyte 12/15-lipoxygenase is remarkably elevated in the plasma and upregulates the central norepinephrine release, resulting in the enhancement of the struggle behaviour (= escape behaviour) in the tail suspension test. Struggle behaviour is mimicking a symptom of emotional arousal. This stress-induced struggle behaviour was absent in 12/15-lipoxygenase deficient mice; however, intravenous administration of a 12/15-lipoxygenase metabolite to these mice after stress exposure rekindled the struggle behaviour. Furthermore, tocotrienols and geranylgeraniol reduced stress-induced 12/15-lipoxygenase metabolite production and suppressed the struggle behaviour. Our findings indicate that arachidonate-derived 12/15-lipoxygenase metabolite is involved in the regulation of stress-enhanced central norepinephrine release and struggle behaviour. In addition, we propose 12/15-lipoxygenase as a potential therapeutic target for the treatment of emotional arousal observed in stress-related mental disorders.
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Affiliation(s)
- Mototada Shichiri
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan; DBT-AIST International Laboratory for Advanced Biomedicine (DAILAB), 1-1-1 Higashi, Tsukuba-shi, Ibaraki, 305-8562, Japan.
| | - Noriko Ishida
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
| | - Yoshinori Aoki
- Healthcare Solutions Unit, Life Solutions Sector, Amenity Life Division, Advanced Solutions Domain, Mitsubishi Chemical Corporation, 1-1-1, Marunouchi, Chiyoda-ku, Tokyo, 100-8251, Japan
| | - Taisuke Koike
- Strategy Department, Advanced Solutions Planning Division, Advanced Solutions Domain, Mitsubishi Chemical Corporation, 1-1-1, Marunouchi, Chiyoda-ku, Tokyo, 100-8251, Japan
| | - Yoshihisa Hagihara
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
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Park NY, Im S, Jiang Q. Different forms of vitamin E and metabolite 13'-carboxychromanols inhibit cyclooxygenase-1 and its catalyzed thromboxane in platelets, and tocotrienols and 13'-carboxychromanols are competitive inhibitors of 5-lipoxygenase. J Nutr Biochem 2021; 100:108884. [PMID: 34710615 DOI: 10.1016/j.jnutbio.2021.108884] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 08/01/2021] [Accepted: 09/22/2021] [Indexed: 12/12/2022]
Abstract
Cyclooxygenase (COX-1 and COX-2)- and 5-lipoxygenase (5-LOX)-catalyzed biosynthesis of eicosanoids play important roles in inflammation and chronic diseases. The vitamin E family has four tocopherols and tocotrienols. We have shown that the metabolites of δ-tocopherol (δT) and δ-tocotrienol (δTE), i.e., δT-13'-carboxychromanol (COOH) and δTE-13'-COOH, respectively, inhibit COX-1/-2 and 5-LOX activity, but the nature of how they inhibit 5-LOX is not clear. Further, the impact of tocopherols and tocotrienols on COX-1/-2 or 5-LOX activity has not been fully delineated. In this study, we found that tocopherols and tocotrienols inhibited human recombinant COX-1 with IC50s of 1-12 µM, and suppressed COX-1-mediated formation of thromboxane in collagen-stimulated rat's platelets with IC50s of 8-50 µM. None of the vitamin E forms directly inhibited COX-2 activity. 13'-COOHs inhibited COX-1 and COX-2 enzyme activity with IC50s of 3-4 and 4-10 µM, respectively, blocked thromboxane formation in collagen- and ionophore-stimulated rats' platelets with IC50s of 1.5-2.5 µM, and also inhibited COX-2-mediated prostaglandins in stimulated cells. Using enzyme kinetics, we observed that δT-13'-COOH, δTE-13'-COOH and δTE competitively inhibited 5-LOX activity with Ki of 1.6, 0.8 and 2.2 µM, respectively. These compounds decreased leukotriene B4 from stimulated neutrophil-like cells without affecting translocation of 5-LOX from cytosol to the nucleus. Our study reveals inhibitory effects of vitamin E forms and 13'-COOHs on COX-1 activity and thromboxane formation in platelets, and elucidates mechanisms underlying their inhibition of 5-LOX. These observations are useful for understanding the role of these compounds in disease prevention and therapy.
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Affiliation(s)
- Na-Young Park
- Department of Nutrition Science, Interdepartmental Nutrition Program, College of Health and Human Sciences, Purdue University, West Lafayette, Indiana, USA
| | - Suji Im
- Department of Nutrition Science, Interdepartmental Nutrition Program, College of Health and Human Sciences, Purdue University, West Lafayette, Indiana, USA
| | - Qing Jiang
- Department of Nutrition Science, Interdepartmental Nutrition Program, College of Health and Human Sciences, Purdue University, West Lafayette, Indiana, USA.
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Ibrahim NF, Hamezah HS, Yanagisawa D, Tsuji M, Kiuchi Y, Ono K, Tooyama I. The effect of α-tocopherol, α- and γ- tocotrienols on amyloid-β aggregation and disaggregation in vitro. Biochem Biophys Rep 2021; 28:101131. [PMID: 34541343 PMCID: PMC8435913 DOI: 10.1016/j.bbrep.2021.101131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 11/27/2022] Open
Abstract
One of the neuropathological hallmarks of Alzheimer's disease (AD)-causing neurodegeneration and consequent memory deterioration, and eventually, cognitive decline-is amyloid-β (Aβ) aggregation forming amyloid plaques. Our previous study showed the potential of a tocotrienol-rich fraction-a mixture of naturally occurring of vitamin E analogs-to inhibit Aβ aggregation and restore cognitive function in an AD mouse model. The current study examined the effect of three vitamin E analogs-α-tocopherol (α-TOC), α-tocotrienol (α-T3), and γ-tocotrienol (γ-T3)-on Aβ aggregation, disaggregation, and oligomerization in vitro. Thioflavin T (ThT) assay showed α-T3 reduced Aβ aggregation at 10 μM concentration. Furthermore, both α-T3 and γ-T3 demonstrated Aβ disaggregation, as shown by the reduction of ThT fluorescence. However, α-TOC showed no significant effect. We confirmed the results for ThT assays with scanning electron microscopy imaging. Further investigation in photo-induced cross-linking of unmodified protein assay indicated a reduction in Aβ oligomerization by γ-T3. The present study thus revealed the individual effect of each tocotrienol analog in reducing Aβ aggregation and oligomerization as well as disaggregating preformed fibrils.
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Affiliation(s)
- Nor Faeizah Ibrahim
- Department of Biochemistry, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Cheras, Kuala Lumpur, 56000, Malaysia
| | - Hamizah Shahirah Hamezah
- Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - Daijiro Yanagisawa
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, 520-2192, Japan
| | - Mayumi Tsuji
- Department of Pharmacology, Showa University School of Medicine, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Yuji Kiuchi
- Department of Pharmacology, Showa University School of Medicine, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Kenjiro Ono
- Department of Neurology, Showa University School of Medicine, Shinagawa-ku, Tokyo, 142-8666, Japan
| | - Ikuo Tooyama
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, 520-2192, Japan
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Garcia-Moreno PJ, de la Rosa LA, Stevens-Barron JC, Rodríguez-Ramirez R, Corral-Diaz B, Alvarez-Parrilla E, Olivas-Aguirre FJ, Wall-Medrano A. Dehiscence and prolonged storage of 'Kerman' Pistachios: Effects on morphometry and nutraceutical value. J Food Sci Technol 2021; 58:1958-1968. [PMID: 33897032 PMCID: PMC8021622 DOI: 10.1007/s13197-020-04707-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/08/2020] [Accepted: 08/11/2020] [Indexed: 06/12/2023]
Abstract
'Kerman' pistachios (KP; Pistacia vera L.) are an important crop for several countries but their commercial value is diminished by their shell dehiscence status and prolonged storage in popular marketplaces. The aim was to evaluate the independent/synergistic effect of prolonged storage (1-4 year) and dehiscence status (split/unsplit) on KP's morphometry and chemical composition. Whole nut's and kernel's length, width, thickness, surface area, and volume were more affected by dehiscence (split > unsplit; p ≤ 0.01) than storage time; Kernel's mass, macronutrient composition and tocopherols (T)/tocotrienols (T3) were not much affected by dehiscence but time-trend correlations were observed with macronutrient composition (split/unsplit; ρ = - 0.57-0.42) and T + T3 (unsplit; ρ = 0.81). Specific/total fatty acids were affected by a complex dehiscence × storage time interaction, and they linearly correlated with certain morphometric characteristics (r ≥ 0.6). Shell dehiscence status more than prolonged storage substantially modifies KP's quality.
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Affiliation(s)
- Perla Judith Garcia-Moreno
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
| | - Laura Alejandra de la Rosa
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
| | - Jazmin Cristina Stevens-Barron
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
| | - Roberto Rodríguez-Ramirez
- Departamento de Biotecnología Y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 sur, Col. Centro, Ciudad Obregón, Son. Mexico
| | - Baltazar Corral-Diaz
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
| | - Emilio Alvarez-Parrilla
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
| | - Francisco Javier Olivas-Aguirre
- Departamento de Ciencias de La Salud, Universidad de Sonora (Campus Cajeme), Blvd. Bordo Nuevo s/n, Antiguo Ejido Providencia, 85010 Ciudad Obregón, Son. Mexico
| | - Abraham Wall-Medrano
- Departamento de Ciencias Químico-Biológicas/Ciencias de La Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, 32310 Ciudad Juárez, Chihuahua, Mexico
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Li F, Xu B, Soltanieh S, Zanghelini F, Abu-Zaid A, Sun J. The effects of tocotrienols intake on obesity, blood pressure, inflammation, liver and glucose biomarkers: a meta-analysis of randomized controlled trials. Crit Rev Food Sci Nutr 2021; 62:7154-7167. [PMID: 33909529 DOI: 10.1080/10408398.2021.1911926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The objective of this study is to accomplish a systematic review and meta-analysis of all randomized controlled trials that dissected the influence of tocotrienol supplementation on various anthropometric and cardiometabolic indices in all individuals, irrespective of health condition. This research was carried out in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement guidelines. 17 eligible articles were included in the final quantitative analysis. Current study revealed that tocotrienol consumption was not associated with CRP, WC, MDA, BMI, IL-6, HbA1C, ALT, AST, creatinine TNF-α, FPG, BW, DBP, and SBP. We did observe an overall increase in BW (SMD: 0.063 kg, 95% CI: -0.200, 0.327, p = 0.637) and DBP (SMD: 0.249 mmHg, 95% CI: 0.053, 0.446, p = 0.013). In addition, a significant reduction in SBP was observed (SMD: -0.616 mmHg, 95% CI: -1.123, -0.110, p = 0.017). In summary, our meta-analysis revealed that tocotrienol consumption was associated with increase in BW and DBP and decrease in SBP. Significant associations were not observed for other outcomes.
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Affiliation(s)
- Fengxiang Li
- Second Department of Cardiology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, China
| | - Biao Xu
- Second Department of Cardiology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, China
| | - Samira Soltanieh
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fernando Zanghelini
- Postgraduate Program in Therapeutic Innovation, Federal University of Pernambuco, Pernambuco, Brazil
| | - Ahmed Abu-Zaid
- Department of Pharmacology, College of Graduate Health Sciences, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Jian Sun
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
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Shadisvaaran S, Chin KY, Shahida MS, Ima-Nirwana S, Leong XF. Effect of vitamin E on periodontitis: Evidence and proposed mechanisms of action. J Oral Biosci 2021; 63:97-103. [PMID: 33864905 DOI: 10.1016/j.job.2021.04.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Periodontitis is a noncommunicable inflammatory disease of the soft tissue and bone surrounding the teeth in the jaw, which affects susceptible individuals with poor oral hygiene. A growing interest has been seen in the use of dietary supplements and natural products for the treatment and prevention of periodontitis. Vitamin E consists of two major groups, namely tocopherols and tocotrienols, which are botanical lipophilic compounds with excellent anti-inflammatory and antioxidant properties. HIGHLIGHT This review aimed to summarize the preclinical and clinical findings on the effects of vitamin E on periodontitis. The current literature suggests that vitamin E could improve the periodontal status by correcting redox status imbalance, reducing inflammatory responses, and promoting wound healing, thus highlighting the potential of vitamin E in the management of periodontitis. CONCLUSION Direct evidence for the use of vitamin E supplementation or treatment of periodontitis in humans is still limited. More well-designed and controlled studies are required to ascertain its effectiveness.
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Mohamad NV, Ima-Nirwana S, Chin KY. Therapeutic potential of annatto tocotrienol with self-emulsifying drug delivery system in a rat model of postmenopausal bone loss. Biomed Pharmacother 2021; 137:111368. [PMID: 33582449 DOI: 10.1016/j.biopha.2021.111368] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/31/2021] [Accepted: 02/03/2021] [Indexed: 02/06/2023] Open
Abstract
Tocotrienol has been shown to prevent bone loss in animal models of postmenopausal osteoporosis, but the low oral bioavailability might limit its use. A self-emulsifying drug delivery system (SEDDS) could increase the bioavailability of tocotrienol. However, evidence of this system in improving the skeletal effects of tocotrienol is scanty. This study aims to evaluate the therapeutic efficacy of annatto tocotrienol with SEDDS in a rat model of postmenopausal bone loss. Ten-month-old female Sprague Dawley rats were randomized into six groups. The baseline group was euthanatized at the onset of the study. Four other groups underwent ovariectomy to induce estrogen deficiency. The sham underwent similar surgery procedure, but their ovaries were retained. Eight weeks after surgery, the ovariectomized rats received one of the four different regimens orally daily: (a) SEDDS, (b) annatto tocotrienol [60 mg/kg body weight (b.w.)] without SEDDS, (c) annatto-tocotrienol (60 mg/kg b.w.) with SEDDS, (d) raloxifene (1 mg/kg b.w.). After eight weeks of treatment, blood was collected for the measurement of delta-tocotrienol level and oxidative stress markers. The rats were euthanized and their bones were harvested for the evaluation of the bone microstructure, calcium content and strength. Circulating delta-tocotrienol level was significantly higher in rats receiving annatto tocotrienol with SEDDS compared to the group receiving unformulated annatto-tocotrienol (p < 0.05). Treatment with unformulated or SEDDS-formulated annatto tocotrienol improved cortical bone thickness, preserved bone calcium content, increased bone biomechanical strength and increased antioxidant enzyme activities compared with the ovariectomized group (p < 0.05). Only SEDDS-formulated annatto tocotrienol improved trabecular microstructure, bone stiffness and lowered malondialdehyde level (p < 0.05 vs the ovariectomized group). The improvement caused by annatto tocotrienol was comparable to raloxifene. In conclusion, SEDDS improves the bioavailability and skeletal therapeutic effects of annatto tocotrienol in a rat model of postmenopausal bone loss. This formulation should be tested in a human clinical trial to validate its efficacy.
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Zuo S, Wang G, Han Q, Xiao H, O Santos H, Avelar Rodriguez D, Khani V, Tang J. The effects of tocotrienol supplementation on lipid profile: A meta-analysis of randomized controlled trials. Complement Ther Med 2020; 52:102450. [PMID: 32951713 DOI: 10.1016/j.ctim.2020.102450] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND & OBJECTIVE Tocotrienol supplementation has been emerged as a potent candidate for the treatment of dyslipidemia. In the present study, a systematic review and meta-analysis of randomized controlled trials was performed with the aim of examining the effects of tocotrienol supplementation on the lipid profile. METHODS Four databases (Scopus, PubMed/Medline, Web of Science and Embase) were used to accomplish the literature search up to November 2019. Clinical trials encompassing the impact of tocotrienol supplementation on lipid profile were extracted regardless of clinical condition, with studies included involving only adults patients. RESULTS A total of 15 articles with 20 arms were eligible and included in the meta-analysis to estimate the pooled effect size. Overall results showed a significant effect of tocotrienol supplementation on increasing high-density lipoprotein cholesterol (HDL-C) levels (weight mean difference (WMD): 0.146 mmol/L, I2 = 85.9%) and a non-significant influence on total cholesterol (TC) (WMD: 0.010 mmol/L, I2 = 64.5%), low-density lipoprotein cholesterol (LDL-C) (WMD: 0.095 mmol/L, I2 = 87.4%), and triglycerides (TG) (WMD: -0.112 mmol/L, I2 = 67.4%) levels. Increment in HDL-C levels was significant greater for the tocotrienol dosage ≥ 200 mg/d (WMD: 0.202 mmol/L) and ≤8 weeks (WMD: 0.278 mmol/L). Moreover, studies that investigated tocotrienol dose ≥200 mg had no heterogeneity, while showing a significant decrease in TG levels (WMD: -0.177 mmol/L). CONCLUSION The present meta-analysis demonstrated that supplementing with tocotrienols does not decrease the concentrations of LDL-C, TC and TG. However, tocotrienol supplementation was considered a candidate for increasing HDL-C levels.
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Affiliation(s)
- Shuping Zuo
- Department of cardiology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Guiping Wang
- Department of cardiology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - QuanLe Han
- Department of cardiology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Hongling Xiao
- School of Nursing, Anhui University of Chinese Medicine, Hefei 230038, China
| | - Heitor O Santos
- School of Medicine, Federal University of Uberlandia (UFU), Uberlandia, Minas Gerais, Brazil
| | - David Avelar Rodriguez
- Department of Pediatric Gastroenterology and Nutrition, Instituto Nacional De Pediatría, Mexico City, Mexico
| | - Vahid Khani
- Department of Radiology, Taleghani Hospital, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jianlei Tang
- Endocrinology, Second People's Hospital of Lianyungang, Jiangsu, Lianyungang 222000, China.
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Liu X, Gao Z, Fu Q, Song L, Zhang P, Zhang X, Hendrickson H, Crooks PA, Zhou D, Zheng G. Deuteration of the farnesyl terminal methyl groups of δ- tocotrienol and its effects on the metabolic stability and ability of inducing G-CSF production. Bioorg Med Chem 2020; 28:115498. [PMID: 32291146 DOI: 10.1016/j.bmc.2020.115498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 01/22/2023]
Abstract
δ-tocotrienol (DT3), a member of vitamin E family, has been shown to have a potent radio-protective effect. However, its application as a radioprotectant is limited, at least in part, by its short plasma elimination half-life and low bioavailability. In an effort to increase the metabolic stability of DT3, a deuterium substituted DT3 derivative, d6-DT3, was designed and synthesized. d6-DT3 showed improved in vitro and in vivo metabolic stability compared to DT3. The unexpected lower potency of d6-DT3 in inducing granulocyte-colony stimulating factor (G-CSF) production in mouse revealed that the metabolite(s) of DT3 might play a major role in inducing G-CSF induction.
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Affiliation(s)
- Xingui Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States
| | - Zhengya Gao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Qiang Fu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Lin Song
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Peiyi Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States
| | - Xuan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States
| | - Howard Hendrickson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Pharmaceutical, Social and Administrative Sciences, School of Pharmacy, Samford University, Birmingham, AL 35229, United States
| | - Peter A Crooks
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Daohong Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States
| | - Guangrong Zheng
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States; Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States.
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Konda AR, Nazarenus TJ, Nguyen H, Yang J, Gelli M, Swenson S, Shipp JM, Schmidt MA, Cahoon RE, Ciftci ON, Zhang C, Clemente TE, Cahoon EB. Metabolic engineering of soybean seeds for enhanced vitamin E tocochromanol content and effects on oil antioxidant properties in polyunsaturated fatty acid-rich germplasm. Metab Eng 2020; 57:63-73. [PMID: 31654815 DOI: 10.1016/j.ymben.2019.10.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/17/2019] [Indexed: 11/26/2022]
Abstract
Soybean seeds produce oil enriched in oxidatively unstable polyunsaturated fatty acids (PUFAs) and are also a potential biotechnological platform for synthesis of oils with nutritional omega-3 PUFAs. In this study, we engineered soybeans for seed-specific expression of a barley homogentisate geranylgeranyl transferase (HGGT) transgene alone and with a soybean γ-tocopherol methyltransferase (γ-TMT) transgene. Seeds for HGGT-expressing lines had 8- to 10-fold increases in total vitamin E tocochromanols, principally as tocotrienols, with little effect on seed oil or protein concentrations. Tocochromanols were primarily in δ- and γ-forms, which were shifted largely to α- and β-tocochromanols with γ-TMT co-expression. We tested whether oxidative stability of conventional or PUFA-enhanced soybean oil could be improved by metabolic engineering for increased vitamin E antioxidants. Selected lines were crossed with a stearidonic acid (SDA, 18:4Δ6,9,12,15)-producing line, resulting in progeny with oil enriched in SDA and α- or γ-linoleic acid (ALA, 18:3Δ9,12,15 or GLA, 18:3Δ6,9,12), from transgene segregation. Oil extracted from HGGT-expressing lines had ≥6-fold increase in free radical scavenging activity compared to controls. However, the oxidative stability index of oil from vitamin E-enhanced lines was ~15% lower than that of oil from non-engineered seeds and nearly the same or modestly increased in oil from the GLA, ALA and SDA backgrounds relative to controls. These findings show that soybean is an effective platform for producing high levels of free-radical scavenging vitamin E antioxidants, but this trait may have negative effects on oxidative stability of conventional oil or only modest improvement of the oxidative stability of PUFA-enhanced oil.
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Affiliation(s)
- Anji Reddy Konda
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Tara J Nazarenus
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Hanh Nguyen
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Junsi Yang
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Malleswari Gelli
- Systems and Innovations for Breeding and Seed Products, Corteva Agriscience, Johnston, IA, 50131, USA
| | - Samantha Swenson
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Jamie M Shipp
- USDA-ARS Plant Genetics Research Unit, Donald Danforth Plant Science Center, 975 North Warson Road, St. Louis, Missouri, 63132, USA
| | - Monica A Schmidt
- USDA-ARS Plant Genetics Research Unit, Donald Danforth Plant Science Center, 975 North Warson Road, St. Louis, Missouri, 63132, USA
| | - Rebecca E Cahoon
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Ozan N Ciftci
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Chunyu Zhang
- National Key Laboratory of Crop Genetic Improvement and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Tom Elmo Clemente
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Edgar B Cahoon
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
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24
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Shah AK, Yeganehjoo H. The stimulatory impact of d-δ- Tocotrienol on the differentiation of murine MC3T3-E1 preosteoblasts. Mol Cell Biochem 2019; 462:173-183. [PMID: 31620952 DOI: 10.1007/s11010-019-03620-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/24/2019] [Indexed: 02/06/2023]
Abstract
Osteoblasts and osteoclasts play essential and opposite roles in maintaining bone homeostasis. Osteoblasts fill cavities excavated by osteoclasts. The mevalonate pathway provides essential prenyl pyrophosphates for the activities of GTPases that promote differentiation of osteoclasts but suppress that of osteoblasts. Preclinical and clinical studies suggest that mevalonate suppressors such as statins increase bone mineral density and reduce risk of bone fracture. Tocotrienols down-regulate 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase, the rate-limiting enzyme in the mevalonate pathway. In vivo studies have shown the bone-protective activity of tocotrienols. We hypothesize that d-δ-tocotrienol, a mevalonate suppressor, induces differentiation of murine MC3T3-E1 preosteoblasts. Alizarin staining showed that d-δ-tocotrienol (0-25 μmol/L) induced mineralized nodule formation in a concentration-dependent manner in MC3T3-E1 preosteoblasts. d-δ-Tocotrienol (0-25 μmol/L), but not D-α-tocopherol (25 μmol/L), significantly induced alkaline phosphatase activity, an indicator of preosteoblast differentiation. The expression of differentiation marker genes including BMP-2 and VEGFα was stimulated dose dependently by d-δ-tocotrienol (0-25 μmol/L). Concomitantly, Western blot analysis showed that d-δ-tocotrienol down-regulated HMG CoA reductase. d-δ-Tocotrienol (0-25 μmol/L) had no impact on the viability of MC3T3-E1 preosteoblasts following 48-h incubation, suggesting lack of cytotoxicity at these doses. Tocotrienols and other mevalonate suppressors have potential in maintaining bone health.
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Affiliation(s)
- Anureet Kaur Shah
- Department of Nutrition and Food Science, Texas Woman's University, Denton, TX, USA. .,Department of Kinesiology and Nutritional Science, California State University, Los Angeles, USA. .,School of Kinesiology and Nutritional Science, California State University, Los Angeles, USA.
| | - Hoda Yeganehjoo
- Department of Nutrition and Food Science, Texas Woman's University, Denton, TX, USA.,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Casati L, Pagani F, Limonta P, Vanetti C, Stancari G, Sibilia V. Beneficial effects of δ- tocotrienol against oxidative stress in osteoblastic cells: studies on the mechanisms of action. Eur J Nutr 2020; 59:1975-87. [PMID: 31280345 DOI: 10.1007/s00394-019-02047-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 07/02/2019] [Indexed: 12/22/2022]
Abstract
Purpose Natural antioxidants are considered as promising compounds in the prevention/treatment of osteoporosis. We studied the ability of purified δ-tocotrienol (δ-TT) isolated from a commercial palm oil (Elaeis guineensis) fraction to protect osteoblast MC3T3-E1 and osteocyte MLO-Y4 cells against tert-butyl hydroperoxide (t-BHP)-induced oxidative damage and the mechanisms involved in its protective action in MC3T3-E1. Methods MC3T3-E1 and MLO-Y4 cells were treated with δ-TT (1.25–20 µg/ml for 2 h) followed by t-BHP at 250 µM or 125 µM for 3 h, respectively. MTT test was used to measure cell viability. Apoptotic cells were stained with Hoechst-33258 dye. Intracellular ROS levels were measured by dichlorofluorescein CM-DCFA. The OPT fluorimetric assay was used to detect the reduced glutathione to oxidized glutathione ratio (GSH/GSSG) contents. Results δ-TT significantly prevented the effects of t-BHP on cell viability and apoptosis reaching a maximum protective activity at 10 and 5 µg/ml in MC3T3-E1 and MLO-Y4 cells, respectively. This protective effect was due to a reduction of intracellular ROS levels and an increase in the defense systems shown by the increase in the GSH/GSSG. GSH loss induced by an inhibitor of GSH synthesis significantly reduced the δ-TT-positive effect on ROS levels. δ-TT prevention of oxidative damage was completely removed by combined treatment with the specific inhibitors of PI3K/AKT (LY294002) and Nrf2 (ML385). Conclusions The δ-TT protective effect against oxidative damage in MC3T3-E1 cells is due to a reduction of intracellular ROS levels and an increase of the GSH/GSSG ratio, and involves an interaction between the PI3K/Akt–Nrf2 signaling pathways.
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Abstract
Vitamin E is a family of related compounds with different vitamin E activities and antioxidant properties that includes tocopherols, tocotrienols and plastochromanol-8. Plant oils could serve as an industrial source not only of tocopherols, but also tocotrienols and plastochromanol-8, which exhibit much stronger antioxidant activities than tocopherols. The aim of this study was a quantitative and qualitative analysis of vitamin E in certain plant oils. We demonstrated the presence of vitamin E derivatives in all the plant oils tested. The highest tocopherol contents were in pomegranate, wheat germ and raspberry seed oils. In general, γ-tocopherol was the predominant tocopherol homologue. Tocotrienols were also identified in most of the oils, but their content was much lower. The highest concentration of tocotrienols was in coriander seed oil. Plastochromanol-8 was present in most of the oils, but wheat germ oil was the richest source.
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Affiliation(s)
- Agnieszka Trela
- Department of Medical Physics and Biophysics, AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Reymonta 19, 30-059 Krakow, Poland
| | - Renata Szymańska
- Department of Medical Physics and Biophysics, AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Reymonta 19, 30-059 Krakow, Poland.
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Abstract
Phytol, the prenyl side chain of chlorophyll, is derived from geranylgeraniol by reduction of three double bonds. Recent results demonstrated that the conversion of geranylgeraniol to phytol is linked to chlorophyll synthesis, which is catalyzed by protein complexes associated with the thylakoid membranes. One of these complexes contains light harvesting chlorophyll binding like proteins (LIL3), enzymes of chlorophyll synthesis (protoporphyrinogen oxidoreductase, POR; chlorophyll synthase, CHLG) and geranylgeranyl reductase (GGR). Phytol is not only employed for the synthesis of chlorophyll, but also for tocopherol (vitamin E), phylloquinol (vitamin K) and fatty acid phytyl ester production. Previously, it was believed that phytol is derived from reduction of geranylgeranyl-diphosphate originating from the 4-methylerythritol-5-phosphate (MEP) pathway. The identification and characterization of two kinases, VTE5 and VTE6, involved in phytol and phytyl-phosphate phosphorylation, respectively, indicated that most phytol employed for tocopherol synthesis is derived from reduction of geranylgeranylated chlorophyll to (phytol-) chlorophyll. After hydrolysis from chlorophyll, free phytol is phosphorylated by the two kinases, and phytyl-diphosphate employed for the synthesis of tocopherol and phylloquinol. The reason why some chloroplast lipids, i.e. chlorophyll, tocopherol and phylloquinol, are derived from phytol, while others, i.e. carotenoids and tocotrienols (in some plant species) are synthesized from geranylgeraniol, remains unclear.
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Razak AM, Khor SC, Jaafar F, Karim NA, Makpol S. Targeting myomiRs by tocotrienol-rich fraction to promote myoblast differentiation. Genes Nutr 2018; 13:31. [PMID: 30519366 PMCID: PMC6267085 DOI: 10.1186/s12263-018-0618-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/05/2018] [Indexed: 11/10/2022]
Abstract
Background Several muscle-specific microRNAs (myomiRs) are differentially expressed during cellular senescence. However, the role of dietary compounds on myomiRs remains elusive. This study aimed to elucidate the modulatory role of tocotrienol-rich fraction (TRF) on myomiRs and myogenic genes during differentiation of human myoblasts. Young and senescent human skeletal muscle myoblasts (HSMM) were treated with 50 μg/mL TRF for 24 h before and after inducing differentiation. Results The fusion index and myotube surface area were higher (p < 0.05) on days 3 and 5 than that on day 1 of differentiation. Ageing reduced the differentiation rate, as observed by a decrease in both fusion index and myotube surface area in senescent cells (p < 0.05). Treatment with TRF significantly increased differentiation at days 1, 3 and 5 of young and senescent myoblasts. In senescent myoblasts, TRF increased the expression of miR-206 and miR-486 and decreased PTEN and PAX7 expression. However, the expression of IGF1R was upregulated during early differentiation and decreased at late differentiation when treated with TRF. In young myoblasts, TRF promoted differentiation by modulating the expression of miR-206, which resulted in the reduction of PAX7 expression and upregulation of IGF1R. Conclusion TRF can potentially promote myoblast differentiation by modulating the expression of myomiRs, which regulate the expression of myogenic genes.
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Affiliation(s)
- Azraul Mumtazah Razak
- Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaakob Latif, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
| | - Shy Cian Khor
- Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaakob Latif, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
| | - Faizul Jaafar
- Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaakob Latif, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
| | - Norwahidah Abdul Karim
- Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaakob Latif, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
| | - Suzana Makpol
- Department of Biochemistry, Faculty of Medicine, Level 17, Preclinical Building, Universiti Kebangsaan Malaysia Medical Centre (UKMMC), Jalan Yaakob Latif, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
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Yang C, Jiang Q. Vitamin E δ- tocotrienol inhibits TNF-α-stimulated NF-κB activation by up-regulation of anti-inflammatory A20 via modulation of sphingolipid including elevation of intracellular dihydroceramides. J Nutr Biochem 2019; 64:101-9. [PMID: 30471562 DOI: 10.1016/j.jnutbio.2018.10.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/30/2018] [Accepted: 10/29/2018] [Indexed: 12/24/2022]
Abstract
Nuclear factor-κB (NF-κB) regulates inflammation and cell survival, and is considered a potential target for anti-inflammatory and anti-cancer therapy. δ-Tocotrienol (δTE), a vitamin E form, has been shown to inhibit NF-κB, but the mechanism underlying this action is not clear. In the present study, we show that δTE inhibited TNF-α-induced activation of NF-κB and LPS-stimulated IL-6 in a dose- and time-dependent manner in Raw 264.7 macrophages. δTE potently inhibited TNF-α-induced phosphorylation of transforming growth factor β-activated kinase 1 (TAK1), an upstream kinase essential for the activation of NF-κB. Interestingly, δTE significantly increased the expression of A20 and to a less extent, cylindromatosis (CYLD), both of which are inhibitors of NF-κB. The importance of induction of A20 in δTE's anti-NF-κB effect is validated in A20 knockout cells where δTE's inhibition of NF-κB was largely diminished. In pursuit of the cause for A20 induction, we found that δTE treatment caused rapid and persistent elevation of dihydroceramides, while decreased ceramides initially but increased ceramides during prolonged treatment. These changes of sphingolipids were accompanied by increased cellular stress markers. Importantly, δTE's induction of A20 and inhibition of NF-κB activation were partially counteracted by myriocin, a potent inhibitor of de novo synthesis of sphingolipids, indicating a critical role of sphingolipid modulation in δTE-mediated effects. Since dihydroceramide has been shown to induce A20 and inhibit NF-κB in RAW cells, we conclude that that δTE inhibits NF-κB activation by enhancing its negative regulator A20 as a result of modulating sphingolipids especially elevation of dihydroceramides.
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Abstract
Recent studies suggested that combined treatment approaches can be used to improve anticancer potency and circumvent the limitations of high-dose tocotrienols administration. Acalypha wilkesiana is a medicinal plant that has been used as an adjunct treatment for cancers in traditional medicine. Herein, the effects of single and combined treatments of β-, γ- and δ-tocotrienols and ethyl acetate extract (9EA) of Acalypha wilkesiana on lung (A549) and brain (U87MG) cancer cells were investigated. γ- and δ-tocotrienols exhibited higher potent antiproliferative effects against A549 (12.1 μg/ml and 13.6 μg/ml) and U87MG cells (3.3 μg/ml and 5.2 μg/ml) compared to β-tocotrienols (9.4 μg/ml and 92.4 μg/ml), respectively. Whereas, 9EA induced potent antiproliferative effects against U87MG cells only (2.0 μg/ml). Combined treatments of tocotrienols and 9EA induced a synergistic growth inhibition with up to 8.4-fold reduction in potent doses of β-, γ- and δ-tocotrienols on A549 cells. Apoptotic features were also evidenced on A549 cells receiving single and combined treatments. The synergism may greatly improve the therapeutic outcome for lung cancer.
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Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, 43500 Semenyih, Malaysia
| | - Su-Wen Lim
- Biotechnology Research Centre, The University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, 43500 Semenyih, Malaysia.,Biotechnology Research Centre, The University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia
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Abu-Fayyad A, Kamal MM, Carroll JL, Dragoi AM, Cody R, Cardelli J, Nazzal S. Development and in-vitro characterization of nanoemulsions loaded with paclitaxel/γ- tocotrienol lipid conjugates. Int J Pharm 2017; 536:146-157. [PMID: 29195915 DOI: 10.1016/j.ijpharm.2017.11.062] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/24/2017] [Accepted: 11/26/2017] [Indexed: 12/14/2022]
Abstract
Vitamin E TPGS is a tocopherol (α-T) based nonionic surfactant that was used in the formulation of the Tocosol™ paclitaxel nanoemulsion, which was withdrawn from phase III clinical trials. Unlike tocopherols, however, the tocotrienol (T3) isomers of vitamin E were found to have innate anticancer activity and were shown to potentiate the antitumor activity of paclitaxel. The primary objective of the present study was therefore to develop a paclitaxel nanoemulsions by substituting α-T oil core of Tocosol™ with γ-T3 in, and vitamin E TPGS with PEGylated γ-T3 as the shell, and test the nanoemulsions against Bx-PC-3 and PANC-1 pancreatic tumor cells. A secondary objective was to test the activity of paclitaxel when directly conjugated with the γ-T3 isomer of vitamin E. The synthesis of the conjugates was confirmed by NMR and mass spectroscopy. Developed nanoemulsions were loaded with free or lipid conjugated paclitaxel. Nanoemulsions droplets were <300 nm with fastest release observed with formulations loaded with free paclitaxel when γ-T3 was used as the core. Substituting α-T with γ-T3 was also found to potentiate the anticancer activity of the nanoemulsions. Although marginal increase in activity was observed when nanoemulsions were loaded with free paclitaxel, a significant increase in activity was observed when lipid conjugates were used. The results from this study suggest that the developed paclitaxel nanoemulsions with either γ-T3, PEGylated γ-T3, or paclitaxel lipid conjugates may represent a more promising option for paclitaxel delivery in cancer chemotherapy.
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Affiliation(s)
- Ahmed Abu-Fayyad
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA; Modavar Pharmaceuticals, Washington, DC, USA
| | - Mohammad M Kamal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Jennifer L Carroll
- Feist-Weiller Cancer Center, Innovative Northwest Louisiana Experimental Therapeutics (INLET), Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Ana-Maria Dragoi
- Feist-Weiller Cancer Center, Innovative Northwest Louisiana Experimental Therapeutics (INLET), Louisiana State University Health Sciences Center, Shreveport, LA, USA; Department of Medicine, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | | | | | - Sami Nazzal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA.
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Nur Azlina MF, Qodriyah HMS, Chua KH, Kamisah Y. Comparison between tocotrienol and omeprazole on gastric growth factors in stress-exposed rats. World J Gastroenterol 2017; 23:5887-5894. [PMID: 28932080 PMCID: PMC5583573 DOI: 10.3748/wjg.v23.i32.5887] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/08/2017] [Accepted: 07/24/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate and compare the effects of tocotrienol and omeprazole on gastric growth factors in rats exposed to water-immersion restraint stress (WIRS).
METHODS Twenty-eight male Wistar rats were randomly assigned to four groups of seven rats. The two control groups were administered vitamin-free palm oil (vehicle) and the two treatment groups were given omeprazole (20 mg/kg) or tocotrienol (60 mg/kg) by oral gavage. After 28 d of treatment, rats from one control group and both treated groups were subjected to WIRS one time for 3.5 h. Gastric lesions were measured and gastric tissues were obtained to measure vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), and transforming growth factor-alpha (TGF-α) mRNA expression.
RESULTS Rats exposed to WIRS for 3.5 h demonstrated the presence of considerable ulcers in the form of gastric erosion. The lesion index in the stressed control (S) group was increased (P < 0.001) compared to the tocotrienol treated and omeprazole treated groups. Stress led to a decrease in gastric VEGF (P < 0.001), bFGF (P < 0.001) and TGF-α (P < 0.001) mRNA levels and caused an increase in EGF mRNA (P < 0.001) that was statistically significant compared to the non-stressed control group. Although both treatment agents exerted similar ulcer reducing ability, only treatment with tocotrienol led to increased expression of VEGF (P = 0.008), bFGF (P = 0.001) and TGF-α (P = 0.002) mRNA.
CONCLUSION Tocotrienol provides gastroprotective effects in WIRS-induced ulcers. Compared to omeprazole, tocotrienol exerts a similar protective effect, albeit through multiple mechanisms of protection, particularly through up-regulation of growth factors that assist in repair of gastric tissue injuries.
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Affiliation(s)
- Mohd Fahami Nur Azlina
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Hj Mohd Saad Qodriyah
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Kien Hui Chua
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Yusof Kamisah
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
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Abstract
Vitamin E refers to a family of eight tocopherols (T) and tocotrienol (T3) isomers. Due to the unique pharmacological and anticancer activity of the individual isomers, there is a need to extract and separate the individual T3 isomers from T/T3 rich fractions of palm oil. The objective of the present study was to present a detailed protocol for the extraction of gram quantities of vitamin E isomers from a T3 rich fraction (Tocotrol™) that was obtained from palm oil, by column chromatography using a binary hexane:EtOAc (1-12%) phase system. The chemical integrity and identity of the extracted isomers was confirmed by TLC, HPLC, 1H-NMR, and Raman analysis. To evaluate their anticancer activity, vitamin E isomers were first entrapped into nanoemulsions and then tested against a panel of breast and pancreatic cancer cell lines. Nanoemulsions were prepared by the solvent evaporation technique. They had an average droplet size between 156-200 nm. In confirmation to what has been reported in the literature, γ-T3 and δ-T3 isomers were found to be significantly more active against tumor cells than the α-T and α-T3 isomers. The current study has demonstrated the feasibility of extracting the individual vitamin E isomers at high yields from natural sources while maintaining their chemical integrity and pharmacological activity.
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Affiliation(s)
- Ahmed Abu-Fayyad
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutical Sciences, University of Louisiana at Monroe, 1800 Bienville Drive, Monroe, LA 71201, USA
| | - Sami Nazzal
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutical Sciences, University of Louisiana at Monroe, 1800 Bienville Drive, Monroe, LA 71201, USA.,College of Pharmacy, Taipei Medical University, Taipei, Taiwan
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Goon JA, Nor Azman NHE, Abdul Ghani SM, Hamid Z, Wan Ngah WZ. Comparing palm oil tocotrienol rich fraction with α-tocopherol supplementation on oxidative stress in healthy older adults. Clin Nutr ESPEN 2017; 21:1-12. [PMID: 30014863 DOI: 10.1016/j.clnesp.2017.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 07/16/2017] [Indexed: 11/23/2022]
Abstract
Vitamin E is a fat-soluble compound and powerful antioxidant that have been shown to protect the cell membranes against damage caused by free radicals. Human vitamin E supplementation studies are usually limited to α-tocopherol but currently tocotrienols are also available. This study aims to compare the effects of tocotrienol rich fraction (TRF) with α-tocopherol (α-TF) supplementation on oxidative stress in healthy male and female older adults aged 50-55 years old. A total of 71 subjects both male and female aged between 50 and 55 years were divided into groups receiving placebo (n = 23), α-TF (n = 24) and TRF (n = 24) for six months. Blood was taken at baseline (month 0), 3 months and 6 months osf supplementation for determination of plasma malondialdehyde (MDA), protein carbonyl, total DNA damage, vitamin D concentration and vitamin E isomers. α-TF supplementation reduced plasma MDA and protein carbonyl in female subjects after 3 and 6 months. TRF supplementation reduced MDA levels in both males and females as early as 3 months while DNA damage was reduced in females only at 6 months. Supplementation with α-TF and TRF increased plasma vitamin D concentration in both males and females after 6 months, but vitamin D concentration in male subjects were significantly higher compared to female subjects in TRF group. Vitamin E isomer determination showed α-TF, α-tocotrienol and γ-tocotrienol were increased in both male and female subjects. In conclusion, TRF supplementation effects were different from α-TF in reducing oxidative stress markers and vitamin D levels with a more pronounced effect in female subjects.
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Shibata A, Kobayashi T, Asai A, Eitsuka T, Oikawa S, Miyazawa T, Nakagawa K. High purity tocotrienols attenuate atherosclerotic lesion formation in apoE-KO mice. J Nutr Biochem 2017; 48:44-50. [PMID: 28759786 DOI: 10.1016/j.jnutbio.2017.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 06/19/2017] [Accepted: 06/19/2017] [Indexed: 12/24/2022]
Abstract
Previous studies have demonstrated that tocotrienol (T3) has antiatherogenic effects. However, the T3 preparations used in those studies contained considerable amounts of tocopherol (Toc), which might affect the biological activity of T3. There is little information on the effect of highly purified T3 on atherosclerosis formation. This study investigated the effect of high-purity T3 on atherosclerotic lesion formation and the underlying mechanisms. Male apolipoprotein E knockout (apoE-KO) mice were fed a cholesterol-containing diet either alone or supplemented with T3 concentrate (Toc-free T3) or with α-Toc for 12 weeks. ApoE-KO mice fed the 0.2% T3-supplemented diet showed reduced atherosclerotic lesion formation in the aortic root. The 0.2% T3 diet induced Slc27a1 and Ldlr gene expression levels in the liver, whereas the α-Toc-supplemented diet did not affect those expression levels. T3 was predominantly deposited in fat tissue in the T3 diet-fed mice, whereas α-Toc was preferentially accumulated in liver in the α-Toc diet-fed mice. Considered together, these data demonstrate that dietary T3 exerts anti-atherosclerotic effect in apoE-KO mice. The characteristic tissue distribution and biological effects of T3, that are substantially different from those of Toc, may contribute to the antiatherogenic properties of T3.
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Affiliation(s)
- Akira Shibata
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
| | - Teiko Kobayashi
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
| | - Akira Asai
- Food and Health Science Research Unit, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan; Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo 113-0023, Japan
| | - Takahiro Eitsuka
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
| | - Shinichi Oikawa
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo 113-0023, Japan
| | - Teruo Miyazawa
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan; Food and Health Science Research Unit, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan; Food and Biotechnology Innovation Project, New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan
| | - Kiyotaka Nakagawa
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
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Abu-Fayyad A, Nazzal S. Synthesis, physiochemical characterization, and in vitro antitumor activity of the amide and pH cleavable hydrazone conjugates of γ- tocotrienol isomer of vitamin E with methoxy-poly(ethylene) glycol. Int J Pharm 2017. [PMID: 28627454 DOI: 10.1016/j.ijpharm.2017.06.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The anticancer activity of water soluble methoxy polyethylene glycol (mPEG) derivatives of tocotrienol (T3) isomers of vitamin E was previously found to be reduced when compared to the parent free isomers. This could be due to the ester bond formation between the mPEG and the 6-OH group on the chroman moiety of the T3 isomer. To further investigate, the objectives of the current study were to (1) synthesize and characterize stable amide and cleavable hydrazone conjugates between mPEG and carbon-5 on the chroman moiety of T3, and (2) examine the cytotoxicity of the newly synthesized mPEG conjugates against breast (MCF-7 and MDA-MB-231) and pancreatic (BxPC-3 and PANC-1) cancer cells. Conjugates were synthesized by direct conjugation of succinyl chloride derivatives of mPEG to the α-tocopherol and γ-tocotrienol isomers of vitamin E, and were characterized by 1H NMR, FT-IR, and mass spectrometry. The micelles of the amide and hydrazone self-assembled conjugates were characterized for size, zeta, CMC, and stability at different pH media. The hydrolysis of the hydrazone conjugate was pH dependent with highest release at acidic (pH 5.5) conditions, whereas the amide conjugate was stable in all tested media. The amide conjugate nonetheless showed greater cytotoxicity than the hydrazone conjugate, which suggested that maintaining solubility and the presence of free 6-OH group are important for γ-T3 to exert anticancer activity in vitro. The results from the current study demonstrated the importance of considering the nature of the chemical bond between T3 and mPEG when designing functional ingredients for use in drug delivery.
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Affiliation(s)
- Ahmed Abu-Fayyad
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sami Nazzal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA; College of Pharmacy, Taipei Medical University, Taipei, Taiwan.
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Jang Y, Rao X, Jiang Q. Gamma- tocotrienol profoundly alters sphingolipids in cancer cells by inhibition of dihydroceramide desaturase and possibly activation of sphingolipid hydrolysis during prolonged treatment. J Nutr Biochem 2017; 46:49-56. [PMID: 28456081 DOI: 10.1016/j.jnutbio.2017.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/11/2017] [Accepted: 04/06/2017] [Indexed: 01/10/2023]
Abstract
Vitamin E gamma-tocotrienol (γTE) is known to have anticancer effects, but mechanisms underlying these actions are not clear. Here using liquid chromatography tandem mass spectrometry, we show that γTE induced marked changes of sphingolipids including rapid elevation of dihydrosphingosine and dihydroceramides (dhCers) in various types of cancer cells. The elevation of dihydrosphingolipids coincided with increased cellular stress, as indicated by JNK phosphorylation, and was prior to any sign of induction of apoptosis. Chemically blocking de novo synthesis of sphingolipids partially counteracted γTE-induced apoptosis and autophagy. Experiments using 13C3, 15N-labeled l-serine together with enzyme assays indicate that γTE inhibited cellular dihydroceramide desaturase (DEGS) activity without affecting its protein expression or de novo synthesis of sphingolipids. Unlike the effect on dhCers, γTE decreased ceramides (Cers) after 8-h treatment but increased C18:0-Cer and C16:0-Cer after 16 and 24 h, respectively. The increase of Cers coincides with γTE-induced apoptosis and autophagy. Since γTE inhibits DEGS and decreases de novo Cer synthesis, elevation of Cers during prolonged γTE treatment is likely caused by sphingomeylinase-mediated hydrolysis of sphingomyelin. This idea is supported by the observation that an acid sphingomeylinase inhibitor partially reversed γTE-induced cell death. Our study demonstrates that γTE altered sphingolipid metabolism by inhibiting DEGS activity and possibly by activating SM hydrolysis during prolonged treatment in cancer cells.
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Affiliation(s)
- Yumi Jang
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907
| | - Xiayu Rao
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907
| | - Qing Jiang
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907.
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Comitato R, Guantario B, Leoni G, Nesaretnam K, Ronci MB, Canali R, Virgili F. Tocotrienols induce endoplasmic reticulum stress and apoptosis in cervical cancer cells. Genes Nutr 2016; 11:32. [PMID: 28031751 PMCID: PMC5180413 DOI: 10.1186/s12263-016-0543-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 10/02/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND We have previously reported that γ- and δ-tocotrienols (γ- and δ-T3) induce gene expression and apoptosis in human breast cancer cells (MDA-MB-231 and MCF-7). This effect is mediated, at least in part, by a specific binding and activation of the estrogen receptor-β (ERβ). Transcriptomic data obtained within our previous studies, interrogated by different bioinformatic tools, suggested the existence of an alternative pathway, activated by specific T3 forms and leading to apoptosis, also in tumor cells not expressing ER. In order to confirm this hypothesis, we conducted a study in HeLa cells, a line of human cervical cancer cells void of any canonical ER form. RESULTS Cells were synchronized by starvation and treated either with a T3-rich fraction from palm oil (10-20 μg/ml) or with purified α-, γ-, and δ-T3 (5-20 μg/ml). α-tocopherol (TOC) was utilized as a negative control. Apoptosis, accompanied by a significant expression of caspase 8, caspase 10, and caspase 12 was observed at 12 h from treatments. The interrogation of data obtained from transcriptomic platforms (NuGO Affymetrix Human Genechip NuGO_Hs1a520180), further confirmed by RT-PCR, suggested that the administration of γ- and δ-T3 associates with Ca2+ release. Data interrogation were confirmed in living cells; in fact, Ca-dependent signals were observed followed by the expression and activation of IRE-1α and of other molecules involved in the unfolded protein response, the core pathway coping with endoplasmic reticulum stress in eukaryotic cells, finally leading to apoptosis. CONCLUSIONS Our study demonstrates that γ- and δ-T3 induce apoptosis also in tumor cells lacking of ERβ by triggering signals originating from endoplasmic reticulum stress. Our observations suggest that tocotrienols could have a significant role in tumor cell physiology and a possible therapeutic potential.
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Affiliation(s)
- Raffaella Comitato
- Council for Agricultural Research and Economics - Food and Nutrition Research Centre (C.R.E.A.-AN), via Ardeatina 546, 00178 Rome, Italy
| | - Barbara Guantario
- Council for Agricultural Research and Economics - Food and Nutrition Research Centre (C.R.E.A.-AN), via Ardeatina 546, 00178 Rome, Italy
| | - Guido Leoni
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Kalanithi Nesaretnam
- Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, 4300 Selangor, Malaysia
| | - Maria Beatrice Ronci
- Council for Agricultural Research and Economics - Food and Nutrition Research Centre (C.R.E.A.-AN), via Ardeatina 546, 00178 Rome, Italy
| | - Raffaella Canali
- Council for Agricultural Research and Economics - Food and Nutrition Research Centre (C.R.E.A.-AN), via Ardeatina 546, 00178 Rome, Italy
| | - Fabio Virgili
- Council for Agricultural Research and Economics - Food and Nutrition Research Centre (C.R.E.A.-AN), via Ardeatina 546, 00178 Rome, Italy
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Karim R, Somani S, Al Robaian M, Mullin M, Amor R, McConnell G, Dufès C. Tumor regression after intravenous administration of targeted vesicles entrapping the vitamin E α- tocotrienol. J Control Release 2016; 246:79-87. [PMID: 27993600 DOI: 10.1016/j.jconrel.2016.12.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/07/2016] [Accepted: 12/12/2016] [Indexed: 10/20/2022]
Abstract
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. In addition, the intravenous administration of tocotrienol entrapped in transferrin-bearing vesicles resulted in tumor suppression for 30% of A431 and 60% of B16-F10 tumors, without visible toxicity. Mouse survival was enhanced by >13days compared to controls administered with the drug solution only. This tumor-targeted, tocotrienol-based nanomedicine therefore significantly improved the therapeutic response in cancer treatment.
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Affiliation(s)
- Reatul Karim
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Sukrut Somani
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Majed Al Robaian
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Margaret Mullin
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Rumelo Amor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gail McConnell
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Christine Dufès
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
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Gafar AA, Draz HM, Goldberg AA, Bashandy MA, Bakry S, Khalifa MA, AbuShair W, Titorenko VI, Sanderson JT. Lithocholic acid induces endoplasmic reticulum stress, autophagy and mitochondrial dysfunction in human prostate cancer cells. PeerJ 2016; 4:e2445. [PMID: 27896021 PMCID: PMC5119235 DOI: 10.7717/peerj.2445] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 08/13/2016] [Indexed: 12/13/2022] Open
Abstract
Lithocholic acid (LCA) is a secondary bile acid that is selectively toxic to human neuroblastoma, breast and prostate cancer cells, whilst sparing normal cells. We previously reported that LCA inhibited cell viability and proliferation and induced apoptosis and necrosis of androgen-dependent LNCaP and androgen-independent PC-3 human prostate cancer cells. In the present study, we investigated the roles of endoplasmic reticulum (ER) stress, autophagy and mitochondrial dysfunction in the toxicity of LCA in PC-3 and autophagy deficient, androgen-independent DU-145 cells. LCA induced ER stress-related proteins, such as CCAAT-enhancer-binding protein homologous protein (CHOP), and the phosphorylation of eukaryotic initiation factor 2-alpha (p-eIF2α) and c-Jun N-terminal kinases (p-JNK) in both cancer cell-types. The p53 upregulated modulator of apoptosis (PUMA) and B cell lymphoma-like protein 11 (BIM) levels were decreased at overtly toxic LCA concentrations, although PUMA levels increased at lower LCA concentrations in both cell lines. LCA induced autophagy-related conversion of microtubule-associated proteins 1A/1B light chain 3B (LC3BI-LC3BII), and autophagy-related protein ATG5 in PC-3 cells, but not in autophagy-deficient DU-145 cells. LCA (>10 µM) increased levels of reactive oxygen species (ROS) concentration-dependently in PC-3 cells, whereas ROS levels were not affected in DU-145 cells. Salubrinal, an inhibitor of eIF2α dephosphorylation and ER stress, reduced LCA-induced CHOP levels slightly in PC-3, but not DU-145 cells. Salubrinal pre-treatment increased the cytotoxicity of LCA in PC-3 and DU-145 cells and resulted in a statistically significant loss of cell viability at normally non-toxic concentrations of LCA. The late-stage autophagy inhibitor bafilomycin A1 exacerbated LCA toxicity at subtoxic LCA concentrations in PC-3 cells. The antioxidant α-tocotrienol strongly inhibited the toxicity of LCA in PC-3 cells, but not in DU-145 cells. Collectively, although LCA induces autophagy and ER stress in PC-3 cells, these processes appear to be initially of protective nature and subsequently consequential to, but not critical for the ROS-mediated mitochondrial dysfunction and cytotoxicity of LCA. The full mechanism of LCA-induced mitochondrial dysfunction and cytotoxicity in the similarly sensitive DU-145 cells remains to be elucidated.
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Affiliation(s)
- Ahmed A Gafar
- Institut Armand-Frappier, Institut National de la Recherche Scientifique (INRS), Laval, QC, Canada; Zoology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Hossam M Draz
- Institut Armand-Frappier, Institut National de la Recherche Scientifique (INRS), Laval, QC, Canada; Department of Biochemistry, National Research Centre, Dokki, Cairo, Egypt
| | - Alexander A Goldberg
- Institut Armand-Frappier, Institut National de la Recherche Scientifique (INRS), Laval, QC, Canada; McGill University Health Centre, Montréal, QC, Canada
| | - Mohamed A Bashandy
- Zoology Department, Faculty of Science, Al-Azhar University , Cairo , Egypt
| | - Sayed Bakry
- Zoology Department, Faculty of Science, Al-Azhar University , Cairo , Egypt
| | - Mahmoud A Khalifa
- Zoology Department, Faculty of Science, Al-Azhar University , Cairo , Egypt
| | - Walid AbuShair
- Zoology Department, Faculty of Science, Al-Azhar University , Cairo , Egypt
| | | | - J Thomas Sanderson
- Institut Armand-Frappier, Institut National de la Recherche Scientifique (INRS) , Laval , QC , Canada
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Huang Y, Wu R, Su ZY, Guo Y, Zheng X, Yang CS, Kong AN. A naturally occurring mixture of tocotrienols inhibits the growth of human prostate tumor, associated with epigenetic modifications of cyclin-dependent kinase inhibitors p21 and p27. J Nutr Biochem 2016; 40:155-163. [PMID: 27889685 DOI: 10.1016/j.jnutbio.2016.10.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 10/19/2016] [Accepted: 10/30/2016] [Indexed: 11/25/2022]
Abstract
Tocotrienols, members of the vitamin E family, have three unsaturated bonds in their side chains. Recently, it has been suggested that the biological effects of tocotrienols may differ from that of tocopherols. Several in vitro studies have shown that tocotrienols have stronger anticancer effects than tocopherols. VCaP cell line used in this study is from a vertebral bone metastasis from a patient with prostate cancer. Eight-week-old male NCr(-/-) nude mice were subcutaneously injected with VCaP-luc cells in matrigel and then administered a tocotrienol mixture for 8 weeks. The tocotrienol mixture inhibited the growth of human prostate tumor xenografts in a dose-dependent manner. The concentrations of tocotrienols and their metabolites were significantly increased in treatment groups. Tocotrienols inhibited prostate tumor growth by suppressing cell proliferation, which was associated with the induction of the cyclin-dependent kinase (CDK) inhibitors p21 and p27. In addition, tocotrienol treatment was associated with elevated H3K9 acetylation levels at proximal promoter regions of p21 and p27 and with decreased expression of histone deacetylases. Tocotrienols inhibited human prostate tumor growth, associated with up-regulation of the CDK inhibitors p21 and p27. Elevated expression of p21 and p27 could be partly due to the suppressed expression of HDACs.
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Affiliation(s)
- Ying Huang
- Department of Pharmaceutics, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Renyi Wu
- Department of Pharmaceutics, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Zheng-Yuan Su
- Department of Pharmaceutics, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Department of Bioscience Technology, Chung Yuan Christian University, Chung Li District, Taoyuan City 32023, Taiwan (R.O.C.)
| | - Yue Guo
- Department of Pharmaceutics, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Xi Zheng
- Department of Chemical Biology, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Chung S Yang
- Department of Chemical Biology, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Ah-Ng Kong
- Department of Pharmaceutics, Earnest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
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Torabi S, Yeganehjoo H, Shen CL, Mo H. Peroxisome proliferator-activated receptor γ down-regulation mediates the inhibitory effect of d-δ- tocotrienol on the differentiation of murine 3T3-F442A preadipocytes. Nutr Res 2016; 36:1345-1352. [PMID: 27884413 DOI: 10.1016/j.nutres.2016.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 10/06/2016] [Accepted: 11/01/2016] [Indexed: 11/26/2022]
Abstract
Tocotrienols accelerate the degradation of 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase that catalyzes the biosynthesis of mevalonate; the latter is essential for preadipocyte differentiation. Tocotrienols also down-regulate peroxisome proliferator-activated receptor γ (PPARγ), a key regulator of adipocyte differentiation. We hypothesized that mevalonate deprivation and PPARγ down-regulation mediate d-δ-tocotrienol-induced inhibition of adipocyte differentiation. The objectives of this study were to determine the effect of d-δ-tocotrienol on 3T3-F442A preadipocyte differentiation and the involvement of PPARγ and mevalonate. Murine 3T3-F442A preadipocytes were incubated with d-δ-tocotrienol (2.5-10 μmol/L) for 8 days. AdipoRed assay and Oil Red O staining showed that d-δ-tocotrienol dose-dependently reduced the intracellular triglyceride content. Concomitantly, d-δ-tocotrienol dose-dependently inhibited glucose uptake by 3T3-F442A cells and the expression of GLUT4, HMG CoA reductase, and p-Akt proteins. The effects of d-δ-tocotrienol on intracellular triglyceride content and glucose uptake were attenuated by rosiglitazone, an agonist of PPARγ, but not supplemental mevalonate (100 μmol/L). In contrast, mevalonate, but not rosiglitazone, reversed the effects of lovastatin, a competitive inhibitor of HMG CoA reductase shown to inhibit adipocyte differentiation via mevalonate deprivation. Trypan blue staining revealed no changes in cell viability after a 48-hour incubation of 3T3-F442A cells with d-δ-tocotrienol (0-80 μmol/L), suggesting that the adipogenesis-suppressive activity of d-δ-tocotrienol was independent of cytotoxicity. In conclusion, these findings demonstrate the antiadipogenic effect of d-δ-tocotrienol via PPARγ down-regulation.
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Affiliation(s)
- Sheida Torabi
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, TX, USA.
| | - Hoda Yeganehjoo
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
| | - Huanbiao Mo
- Department of Nutrition, Byrdine F. Lewis School of Nursing and Health Professions, Georgia State University, Atlanta, GA, USA; Center for Obesity Reversal, Georgia State University, Atlanta, GA, USA.
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43
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Liu X, Gujarathi S, Zhang X, Shao L, Boerma M, Compadre CM, Crooks PA, Hauer-Jensen M, Zhou D, Zheng G. Synthesis of (2 R,8' S,3' E)-δ-tocodienol, a tocoflexol family member designed to have a superior pharmacokinetic profile compared to δ- tocotrienol. Tetrahedron 2016; 72:4001-4006. [PMID: 27773949 PMCID: PMC5070675 DOI: 10.1016/j.tet.2016.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A group of side chain partially saturated tocotrienol analogues, namely tocoflexols, have been previously designed in an effort to improve the pharmacokinetic properties of tocotrienols. (2R,8'S,3'E,11'E)-δ-Tocodienol (1) was predicted to be a high value tocoflexol for further pharmacological evaluation. We now report here an efficient 8-step synthetic route to compound 1 utilizing naturally-occurring δ-tocotrienol as a starting material (24% total yield). The key step in the synthesis is oxidative olefin cleavage of δ-tocotrienol to afford the chroman core of 1 with retention of chirality at the C-2 stereocenter.
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Affiliation(s)
- Xingui Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Satheesh Gujarathi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Xuan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Lijian Shao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Marjan Boerma
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Cesar M. Compadre
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Peter A. Crooks
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Martin Hauer-Jensen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Daohong Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Guangrong Zheng
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
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Cheishvili D, Maayan C, Holzer N, Tsenter J, Lax E, Petropoulos S, Razin A. Tocotrienol Treatment in Familial Dysautonomia: Open-Label Pilot Study. J Mol Neurosci 2016; 59:382-91. [PMID: 27129499 DOI: 10.1007/s12031-016-0760-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/22/2016] [Indexed: 10/21/2022]
Abstract
Familial dysautonomia (FD) is an autosomal recessive congenital neuropathy, primarily presented in Ashkenazi Jews. The most common mutation in FD patients results from a single base pair substitution of an intronic splice site in the IKBKAP gene which disrupts normal mRNA splicing and leads to tissue-specific reduction of IKBKAP protein (IKAP). To date, treatment of FD patients remains preventative, symptomatic and supportive. Based on previous in vitro evidence that tocotrienols, members of the vitamin E family, upregulate transcription of the IKBKAP gene, we aimed to investigate whether a similar effects was observed in vivo. In the current study, we assessed the effects of tocotrienol treatment on FD patients' symptoms and IKBKAP expression in white blood cells. The initial daily doses of 50 or 100 mg tocotrienol, doubled after 3 months, was administered to 32 FD patients. Twenty-eight FD patients completed the 6-month study. The first 3 months of tocotrienol treatment was associated with a significant increase in IKBKAP expression level in FD patients' blood. Despite doubling the dose after the initial 3 months of treatment, IKBKAP expression level returned to baseline by the end of the 6-month treatment. Clinical improvement was noted in the reported clinical questionnaire (with regard to dizziness, bloching, sweating, number of pneumonia, cough episodes, and walking stability), however, no significant effect was observed in any clinical measurements (weight, height, oxygen saturation, blood pressure, tear production, histamine test, vibration threshold test, nerve conduction, and heart rate variability) following Tocotrienol treatment. In conclusion, tocotrienol treatment appears significantly beneficial by clinical evaluation for some FD patients in a few clinical parameters; however it was not significant by clinical measurements. This open-label study shows the complexity of effect of tocotrienol treatment on FD patients' clinical outcomes and on IKBKAP expression level compared to in vitro results. A longitudinal study with an increased sample size is required in the future to better understand tocotrienol affect on FD patients.
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Affiliation(s)
- David Cheishvili
- The Israeli Familial Dysautonomia Center at the Department of Pediatrics, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel. .,Department of Rehabilitation, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel. .,Department of Pharmacology & Therapeutics, McGill University Medical School, 3655 Promenade Sir William Osler, Montreal, QC, H3G 1Y6, Canada. .,Department of Developmental Biology and Cancer Research, The Hebrew University, Hadassah School of Medicine, Jerusalem, Israel.
| | - Channa Maayan
- The Israeli Familial Dysautonomia Center at the Department of Pediatrics, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel.,Department of Rehabilitation, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Naama Holzer
- The Israeli Familial Dysautonomia Center at the Department of Pediatrics, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel.,Department of Rehabilitation, Hadassah University Hospital Mount Scopus, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Jeanna Tsenter
- Department of Developmental Biology and Cancer Research, The Hebrew University, Hadassah School of Medicine, Jerusalem, Israel
| | - Elad Lax
- Department of Pharmacology & Therapeutics, McGill University Medical School, 3655 Promenade Sir William Osler, Montreal, QC, H3G 1Y6, Canada
| | - Sophie Petropoulos
- Department of Pharmacology & Therapeutics, McGill University Medical School, 3655 Promenade Sir William Osler, Montreal, QC, H3G 1Y6, Canada
| | - Aharon Razin
- Department of Developmental Biology and Cancer Research, The Hebrew University, Hadassah School of Medicine, Jerusalem, Israel
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Srichamnong W, Thiyajai P, Charoenkiatkul S. Conventional steaming retains tocols and γ-oryzanol better than boiling and frying in the jasmine rice variety Khao dok mali 105. Food Chem 2016; 191:113-9. [PMID: 26258709 DOI: 10.1016/j.foodchem.2015.05.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/30/2015] [Accepted: 05/05/2015] [Indexed: 11/24/2022]
Abstract
The aim of this study was to determine the effect of various cooking methods on the white rice (WR), brown rice (BR) and parboiled geminated brown rice (PGBR) of the same variety, focusing on γ-oryzanol and tocols. The methods used for analysis of γ-oryzanol and tocols included solvent extraction and HPLC. The results indicated that PGBR had a higher content of γ-oryzanol and tocols compared to BR and WR, when different cooking methods (raw, steamed, boiled and fried) were used. Steaming method retained the higher γ-oryzanol content (53.6-62.2mg/100g) in both PGBR and BR, in comparison with boiling (53.0-60.6mg/100g) and frying (23.4-31.5mg/100g) methods. Frying reduced the γ-oryzanol content significantly regardless of the rice type. Regarding tocols, a similar trend was noticed in all the methods studied. Tocotrienol was the most abundant tocol found in PGBR and BR. Therefore, steaming is the best cooking method to preserved most of the bioactive compounds; however, a slight increase in total tocols was observed after frying.
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Affiliation(s)
- Warangkana Srichamnong
- Institute of Nutrition, Mahidol University, Salaya Campus, Phuttamonton, Nakhon Pathom 73170, Thailand.
| | - Parunya Thiyajai
- Institute of Nutrition, Mahidol University, Salaya Campus, Phuttamonton, Nakhon Pathom 73170, Thailand
| | - Somsri Charoenkiatkul
- Institute of Nutrition, Mahidol University, Salaya Campus, Phuttamonton, Nakhon Pathom 73170, Thailand.
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Xia W, Mo H. Potential of tocotrienols in the prevention and therapy of Alzheimer's disease. J Nutr Biochem 2015; 31:1-9. [PMID: 27133418 DOI: 10.1016/j.jnutbio.2015.10.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/19/2015] [Accepted: 10/23/2015] [Indexed: 02/07/2023]
Abstract
Currently there is no cure for Alzheimer's disease (AD); clinical trials are underway to reduce amyloid generation and deposition, a neuropathological hallmark in brains of AD patients. While genetic factors and neuroinflammation contribute significantly to AD pathogenesis, whether increased cholesterol level is a causative factor or a result of AD is equivocal. Prenylation of proteins regulating neuronal functions requires mevalonate-derived farnesyl pyrophosphate (FPP) and geranylgeranyl pyrophosphate (GGPP). The observation that the levels of FPP and GGPP, but not that of cholesterol, are elevated in AD patients is consistent with the finding that statins, competitive inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase, reduce FPP and GGPP levels and amyloid β protein production in preclinical studies. Retrospective studies show inverse correlations between incidence of AD and the intake and serum levels of the HMG CoA reductase-suppressive tocotrienols; tocopherols show mixed results. Tocotrienols, but not tocopherols, block the processing and nuclear localization of sterol regulatory element binding protein-2, the transcriptional factor for HMG CoA reductase and FPP synthase, and enhance the degradation of HMG CoA reductase. Consequently, tocotrienols deplete the pool of FPP and GGPP and potentially blunt prenylation-dependent AD pathogenesis. The antiinflammatory activity of tocotrienols further contributes to their protection against AD. The mevalonate- and inflammation-suppressive activities of tocotrienols may represent those of an estimated 23,000 mevalonate-derived plant secondary metabolites called isoprenoids, many of which are neuroprotective. Tocotrienol-containing plant foods and tocotrienol derivatives and formulations with enhanced bioavailability may offer a novel approach in AD prevention and treatment.
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Affiliation(s)
- Weiming Xia
- Geriatric Research Education and Clinical Center, ENR Memorial Veterans Hospital, Bedford, MA.
| | - Huanbiao Mo
- Department of Nutrition, Byrdine F. Lewis School of Nursing and Health Professions, Georgia State University, Atlanta, GA; Center for Obesity Reversal, Georgia State University, Atlanta, GA.
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47
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Kamisah Y, Norsidah KZ, Azizi A, Faizah O, Nonan MR, Asmadi AY. Palm tocotrienol-rich fraction inhibits methionine-induced cystathionine β-synthase in rat liver. J Physiol Biochem 2015; 71:659-67. [PMID: 26403767 DOI: 10.1007/s13105-015-0431-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 08/28/2015] [Indexed: 01/23/2023]
Abstract
Oxidative stress plays an important role in cardiovascular diseases. The study investigated the effects of dietary palm tocotrienol-rich fraction on homocysteine metabolism in rats fed a high-methionine diet. Forty-two male Wistar rats were randomly assigned to six groups. Five groups were fed with high-methionine diet (1%) for 10 weeks. Groups 2 to 5 were also given dietary folate (8 mg/kg) and three doses of palm tocotrienol-rich fraction (30, 60 and 150 mg/kg) from week 6 to week 10. The last group was only given basal rat chow. High-methionine diet increased plasma homocysteine after 10 weeks, which was prevented by the supplementations of folate and high-dose palm tocotrienol-rich fraction. Hepatic S-adenosyl methionine (SAM) content was unaffected in all groups but S-adenosyl homocysteine (SAH) content was reduced in the folate group. Folate supplementation increased the SAM/SAH ratio, while in the palm tocotrienol-rich fraction groups, the ratio was lower compared with the folate. Augmented activity of hepatic cystathionine β-synthase and lipid peroxidation content by high-methionine diet was inhibited by palm tocotrienol-rich fraction supplementations (moderate and high doses), but not by folate. The supplemented groups had lower hepatic lipid peroxidation than the high-methionine diet. In conclusion, palm tocotrienol-rich fraction reduced high-methionine-induced hyperhomocysteinaemia possibly by reducing hepatic oxidative stress in high-methionine-fed rats. It may also exert a direct inhibitory effect on hepatic cystathionine β-synthase.
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Affiliation(s)
- Yusof Kamisah
- Department of Pharmacology, Faculty of Medicine, UKMMC, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Cheras, 56000, Kuala Lumpur, Malaysia.
| | - Ku-Zaifah Norsidah
- Department of Pharmacology, Faculty of Medicine, UKMMC, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Cheras, 56000, Kuala Lumpur, Malaysia.,Department of Basic Medical Sciences, Kuliyyah of Medicine, International Islamic University of Malaysia, Kuantan, Pahang, Malaysia
| | - Ayob Azizi
- Division of Pathology, School of Medicine, International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia
| | - Othman Faizah
- Department of Anatomy, Faculty of Medicine, UKMMC, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur, Malaysia
| | - Mohd Rizal Nonan
- Department of Pathology, Faculty of Medicine, UKMMC, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur, Malaysia
| | - Ahmad Yusof Asmadi
- Faculty of Traditional and Complementary Medicine, Cyberjaya University College of Medical Sciences, Cyberjaya, Selangor, Malaysia
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48
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Gee PT, Liew CY, Thong MC, Gay MCL. Vitamin E analysis by ultra-performance convergence chromatography and structural elucidation of novel α-tocodienol by high-resolution mass spectrometry. Food Chem 2015; 196:367-73. [PMID: 26593503 DOI: 10.1016/j.foodchem.2015.09.073] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 08/30/2015] [Accepted: 09/16/2015] [Indexed: 11/27/2022]
Abstract
We have developed a method for analysing vitamin E using ultra-performance convergence chromatography with a chromatographic runtime of 5.5 min. A well-resolved chromatogram with excellent precision in retention time revealed seven vitamin E components in the palm oil derived tocotrienol-rich fraction. The major vitamin E components were α-tocopherol, α-tocotrienol, γ-tocotrienol and δ-tocotrienol whereas the minor vitamin E components were α-tocomonoenol, β-tocotrienol and an unreported trace component. The new component was positively identified by high-resolution mass spectrometry as 2-methyl-2(4',8',12'-trimethyltrideca-7',11'-dienyl)5,7,8-trimethylchroman-6-ol or α-tocodienol.
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Affiliation(s)
- Ping Tou Gee
- Palm Nutraceuticals Sdn. Bhd., Batu 7, Jalan Mawai, 81900 Kota Tinggi, Johor, Malaysia.
| | - Chen Yee Liew
- Research Instruments Sdn. Bhd., D7-1-G, Pusat Perdagangan Dana 1, Jalan PJU1A/46, 47301 Petaling Jaya, Selangor, Malaysia
| | - Meng Chil Thong
- Matrix Analytical Technologies Sdn. Bhd., 43-45B, Jalan SS 25/2, Taman Bukit Emas, 47301 Petaling Jaya, Selangor, Malaysia
| | - Melvin C L Gay
- Waters Pacific Pte Ltd., 1 Science Park Road, #02-08 The Capricorn, Singapore Science Park II, Singapore 117528
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49
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Kim NH, Kwak J, Baik JY, Yoon MR, Lee JS, Yoon SW, Kim IH. Changes in lipid substances in rice during grain development. Phytochemistry 2015; 116:170-179. [PMID: 26021733 DOI: 10.1016/j.phytochem.2015.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 04/27/2015] [Accepted: 05/13/2015] [Indexed: 05/13/2023]
Abstract
Lipid substances, such as fatty acids, γ-oryzanol, policosanols, and tocol (tocopherol+tocotrienol), were investigated in two rice cultivars, Ilpum and Dasan, during rice development. In both cultivars, the lipid extract level decreased steadily after it reached its maximum level. Additionally, there were differences in the fatty acid composition, depending on the rice developmental stage, between the two cultivars. The γ-oryzanol level increased during rice development, and there were differences in the composition of γ-oryzanol between the two cultivars. The levels of policosanols drastically decreased during the early stage of rice development in the two cultivars. The total tocol level showed a downward trend during rice development. The predominant tocol isomer in Ilpum was α-tocopherol during rice development. In Dasan, the predominant tocol isomer was α-tocopherol at the early stage, but γ-tocotrienol at the later stage. This study provided information on the levels and composition of lipid substances, such as fatty acids, γ-oryzanol, policosanols, and tocol during rice development.
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Affiliation(s)
- Nam Ho Kim
- Department of Food and Nutrition, Korea University, Seoul, Republic of Korea; BK21PLUS Program in Embodiment: Health-Society Interaction, Department of Public Health Sciences, Graduate School, Korea University, Seoul 136 703, Republic of Korea
| | - Jieun Kwak
- National Institute of Crop Science, Rural Development Administration, Suwon, Gyunggi-do, Republic of Korea
| | - Ji Yeon Baik
- Department of Food and Nutrition, Korea University, Seoul, Republic of Korea; BK21PLUS Program in Embodiment: Health-Society Interaction, Department of Public Health Sciences, Graduate School, Korea University, Seoul 136 703, Republic of Korea
| | - Mi-Ra Yoon
- National Institute of Crop Science, Rural Development Administration, Suwon, Gyunggi-do, Republic of Korea
| | - Jeom-Sig Lee
- National Institute of Crop Science, Rural Development Administration, Suwon, Gyunggi-do, Republic of Korea
| | - Sung Won Yoon
- Department of Food and Nutrition, Korea University, Seoul, Republic of Korea
| | - In-Hwan Kim
- Department of Food and Nutrition, Korea University, Seoul, Republic of Korea; BK21PLUS Program in Embodiment: Health-Society Interaction, Department of Public Health Sciences, Graduate School, Korea University, Seoul 136 703, Republic of Korea.
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50
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Abu-Fayyad A, Behery F, Sallam AA, Alqahtani S, Ebrahim H, El Sayed KA, Kaddoumi A, Sylvester PW, Carroll JL, Cardelli JA, Nazzal S. PEGylated γ- tocotrienol isomer of vitamin E: Synthesis, characterization, in vitro cytotoxicity, and oral bioavailability. Eur J Pharm Biopharm 2015; 96:185-95. [PMID: 26235392 DOI: 10.1016/j.ejpb.2015.07.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/14/2015] [Accepted: 07/24/2015] [Indexed: 12/12/2022]
Abstract
Vitamin E refers to a family of eight isomers divided into two subgroups, tocopherols and the therapeutically active tocotrienols (T3). The PEGylated α-tocopherol isomer of vitamin E (vitamin E TPGS) has been extensively investigated for its solubilizing capacity as a nonionic surfactant in various drug delivery systems. Limited information, however, is available about the PEG conjugates of the tocotrienol isomers of vitamin E. In this study two PEGylated γ-T3 variants with mPEG molecular weights of 350 (γ-T3PGS 350) and 1000 (γ-T3PGS 1000) were synthesized by a two-step reaction procedure and characterized by (1)H NMR, HPLC, and mass spectroscopy. The physical properties of their self-assemblies in water were characterized by zeta, CMC, and size analysis. Similar physical properties were found between the PEGylated T3 and vitamin E TPGS. PEGylated T3 were also found to retain the in vitro cytotoxic activity of the free T3 against the MCF-7 and the triple-negative MDA-MB-231 breast cancer cells. PEGylated γ-T3 also increased the oral bioavailability of γ-T3 by threefolds when compared to the bioavailability of γ-T3 formulated into a self-emulsified drug delivery system. No significant differences in biological activity were found between the PEG 350 and 100 conjugates. Results from this study suggest that PEGylation of γ-T3 represents a viable platform for the oral and parenteral delivery of γ-T3 for potential use in the prevention of breast cancer.
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Affiliation(s)
- Ahmed Abu-Fayyad
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Fathy Behery
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Asmaa A Sallam
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Saeed Alqahtani
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Hassan Ebrahim
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Khalid A El Sayed
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Amal Kaddoumi
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Paul W Sylvester
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Jennifer L Carroll
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, USA; Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - James A Cardelli
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, USA; Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Sami Nazzal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA; College of Pharmacy, Taipei Medical University, Taipei, Taiwan.
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