201
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Curcumin and o-Vanillin Exhibit Evidence of Senolytic Activity in Human IVD Cells In Vitro. J Clin Med 2019; 8:jcm8040433. [PMID: 30934902 PMCID: PMC6518239 DOI: 10.3390/jcm8040433] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 03/26/2019] [Indexed: 01/21/2023] Open
Abstract
Curcumin and o-Vanillin cleared senescent intervertebral disc (IVD) cells and reduced the senescence-associated secretory phenotype (SASP) associated with inflammation and back pain. Cells from degenerate and non-mildly-degenerate human IVD were obtained from organ donors and from patients undergoing surgery for low back pain. Gene expression of senescence and SASP markers was evaluated by RT-qPCR in isolated cells, and protein expression of senescence, proliferation, and apoptotic markers was evaluated by immunocytochemistry (ICC). The expression levels of SASP factors were evaluated by enzyme-linked immunosorbent assay (ELISA). Matrix synthesis was verified with safranin-O staining and the Dimethyl-Methylene Blue Assay for proteoglycan content. Western blotting and ICC were used to determine the molecular pathways targeted by the drugs. We found a 40% higher level of senescent cells in degenerate compared to non-mildly-degenerate discs from unrelated individuals and a 10% higher level in degenerate compared to non-mildly-degenerate discs from the same individual. Higher levels of senescence were associated with increased SASP. Both drugs cleared senescent cells, and treatment increased the number of proliferating as well as apoptotic cells in cultures from degenerate IVDs. The expression of SASP factors was decreased, and matrix synthesis increased following treatment. These effects were mediated through the Nrf2 and NFkB pathways.
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202
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Zhang B, Xu C, Sun C, Yu C. Polyphosphoester-Based Nanocarrier for Combined Radio-Photothermal Therapy of Breast Cancer. ACS Biomater Sci Eng 2019; 5:1868-1877. [PMID: 33405560 DOI: 10.1021/acsbiomaterials.9b00051] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Recently, clinical research on tumor therapy has gradually shifted from traditional monotherapy toward combination therapy as tumors are complex, diverse, and heterogeneous. Combination therapy may be essential for achieving the optimized treatment efficacy of tumors through distinct tumor-inhibiting mechanisms. At the same time, nanocarriers are emerging as an excellent strategy for delivering both drugs simultaneously. This work presents utilization of a polyphosphoester-based nanocarrier (NPIR/Cur) to achieve the codelivery of hydrophobic photothermal agent IR-780 and radiosensitizer curcumin (Cur). The IR-780 and curcumin coencapsulated NPIR/Cur exhibited adequate drug loading, a prolonged blood half-life, enhanced passive tumor homing, and improved curcumin bioavailability as well as combined therapeutic functions. Briefly, NPIR/Cur could not only achieve effective thermal ablation through the conversion of near-infrared light to heat, but also give rise to a significant boosted local radiation dose to trigger promoted radiation damages, thus resulting in enhanced tumor cell growth inhibition. In conclusion, the as-prepared NPIR/Cur manifested excellent performance in facilitating combined photothermal and radiation therapy, thus expanding the application range of PPE-based carriers in nanomedicine, and also prompting exploration of their potential for other effective combination therapies.
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Affiliation(s)
- Beibei Zhang
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Congfei Xu
- Institutes for Life Sciences, School of Medicine and National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, Guandong 510006, P. R. China
| | - Chunyang Sun
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China.,State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, P.R. China
| | - Chunshui Yu
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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203
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Momekova D, Ugrinova I, Slavkova M, Momekov G, Grancharov G, Gancheva V, Petrov PD. Superior proapoptotic activity of curcumin-loaded mixed block copolymer micelles with mitochondrial targeting properties. Biomater Sci 2019; 6:3309-3317. [PMID: 30357130 DOI: 10.1039/c8bm00644j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Targeting tumor cell mitochondria is a prospective strategy for highly effective anticancer therapy. Consequently, the development of potent systems for the targeted delivery of mitochondria-acting therapeutics to mitochondria has the potential to boost this sector of nanomedicine. In this study, a functional mixed micellar system based on two co-assembled triblock copolymers, poly(2-(dimethylamino)ethyl methacrylate)-b-poly(ε-caprolactone)-b-poly(2-(dimethylamino)ethyl methacrylate) bearing triphenylphosphonium ligands (PDMAEMA(TPP+)20-b-PCL70-b-PDMAEMA(TPP+)20) and poly(ethylene oxide)-b-poly(ε-caprolactone)-b-poly(ethylene oxide) (PEO113-b-PCL70-b-PEO113), was assessed for the mitochondria targeted delivery of curcumin. The high proapoptotic activity of the system and the sub-cellular mechanisms of cytotoxicity were demonstrated using a chemosensitive HL-60 cell line and its resistant alternative HL-60/DOX. Next, the successful localization of nanocarriers in mitochondria was proved by fluorescence microscopy with the aid of DAPI (4',6-diamidino-2-phenylindole) as a cellular localization tracker. The in vitro experiments revealed the great potential of the functional system developed for the targeted delivery of curcumin to mitochondria, causing programmed tumor cell death.
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Affiliation(s)
- Denitsa Momekova
- Faculty of Pharmacy, Medical University of Sofia, 2 Dunav St., 1000 Sofia, Bulgaria
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204
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Reolon JB, Brustolin M, Accarini T, Viçozzi GP, Sari MHM, Bender EA, Haas SE, Brum MCS, Gündel A, Colomé LM. Co-encapsulation of acyclovir and curcumin into microparticles improves the physicochemical characteristics and potentiates in vitro antiviral action: Influence of the polymeric composition. Eur J Pharm Sci 2019; 131:167-176. [PMID: 30790703 DOI: 10.1016/j.ejps.2019.02.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 12/21/2018] [Accepted: 02/14/2019] [Indexed: 01/23/2023]
Abstract
The present study developed and characterized microparticles formulations containing acyclovir and curcumin co-encapsulated in order to overcome the biopharmaceutical limitations and increase the antiviral effect of both drugs. The microparticles were prepared by a spray drying methodology following the ratio 1:3 (drug:polymer), which were made by hydroxypropylmethylcellulose (HPMC) and/or Eudragit® RS100 (EUD). The MP-1 formulation was composed of HPMC and EUD (1:1), MP-2 formulation was composed only of HPMC and MP-3 formulation was composed only of EUD. All formulations showed yielding around 50% and acceptable powder flowability. Drug content determination around 82.1-96.8% and 81.8-87% for acyclovir and curcumin, respectively. The microparticles had spherical shape, size within 11.5-15.3 μm, unimodal distribution and no chemical interactions among the components of the formulations. Of particular importance, the polymeric composition considerably influenced on the release profile of the drugs. The in vitro release experiment demonstrated that the microencapsulation provided a sustained release of acyclovir as well as increased the solubility of curcumin. Besides, mathematical modeling indicated that the experimental fit biexponential equation. Importantly, drugs microencapsulation promoted superior antiviral effect against BoVH-1 virus in comparison to their free form, which could be attributed to the improvement in the aforementioned physicochemical parameters. Therefore, these formulations could be promising technological drug carriers for acyclovir and curcumin, which highlight the great offering a potential alternative treatment for viral herpes.
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Affiliation(s)
- Jéssica Brandão Reolon
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Maicon Brustolin
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Thainá Accarini
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Gabriel Pedroso Viçozzi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Marcel Henrique Marcondes Sari
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Tecnologia Farmacêutica, Departamento de Farmácia Industrial, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Eduardo André Bender
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Sandra Elisa Haas
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Mario Celso Sperrotto Brum
- Programa de pós-graduação em Ciência Animal, Laboratório de Virologia, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - André Gündel
- Curso de Licenciatura em Física, Universidade Federal do Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, Bagé 96413-170, RS, Brazil
| | - Letícia Marques Colomé
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil.
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205
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The delivery of sensitive food bioactive ingredients: Absorption mechanisms, influencing factors, encapsulation techniques and evaluation models. Food Res Int 2019; 120:130-140. [PMID: 31000223 DOI: 10.1016/j.foodres.2019.02.024] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 02/10/2019] [Accepted: 02/14/2019] [Indexed: 02/07/2023]
Abstract
Food-sourced bioactive compounds have drawn much attention due to their health benefits such as anti-oxidant, anti-cancer, anti-diabetes and cardiovascular disease-preventing functions. However, the poor solubility, low stability and limited bioavailability of sensitive bioactive compounds greatly limited their application in food industry. Therefore, numbers of carriers were developed for improving their dispersibility, stability and bioavailability. This review addresses the digestion and absorption mechanisms of bioactive compounds in epithelial cells based on several well-known in vitro and in vivo models. Factors such as environmental stimuli, stomach conditions and mucus barrier influencing the utilization efficacy of the bioactive compounds are discussed. Delivery systems with enhanced utilization efficacy, such as complex coacervates, cross-linked polysaccharides, self-assembled micro-/nano-particles and Pickering emulsions are compared. It is a comprehensive multidisciplinary review which provides useful guidelines for application of bioactive compounds in food industry.
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206
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Jeyaraman P, Alagarraj A, Natarajan R. In silico and in vitro studies of transition metal complexes derived from curcumin-isoniazid Schiff base. J Biomol Struct Dyn 2019; 38:488-499. [PMID: 30767624 DOI: 10.1080/07391102.2019.1581090] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A series of transition metal complexes have been synthesized from biologically active curcumin and isoniazid Schiff base. They are characterized by various spectral techniques like UV-Vis, Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR) and mass spectroscopies. Moreover, elemental analysis, magnetic susceptibility and molar conductivity measurements are also carried out. All these data evidence that the metal complexes acquire square planar except zinc(II) which adopts a tetrahedral geometry, and they are non-electrolytic in nature. Groove mode of binding between the calf thymus DNA (CT DNA) and metal complexes is confirmed by electronic absorption titration, viscosity and cyclic voltammetry studies. In addition to that, all the metal complexes are able to cleave pUC 19 DNA. Optimized geometry and ground-state electronic structure calculations of all the synthesized compounds are established out by density functional theory (DFT) using B3LYP method which theoretically reveals that copper(II) complex explores higher stability and higher biological accessibility. This is experimentally corroborated by antimicrobial studies. In silico Absorption, Distribution, Metabolism, Excretion (ADME) studies reveal the biological potential of all synthesized complexes, and also biological activity of the ligand is predicted by PASS online biological activity prediction software. Molecular docking studies are also carried out to confirm the groove mode of binding and receptor-complex interactions.
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Affiliation(s)
- Porkodi Jeyaraman
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu, India
| | - Arunadevi Alagarraj
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu, India
| | - Raman Natarajan
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu, India
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207
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Ettari R, Previti S, Maiorana S, Allegra A, Schirmeister T, Grasso S, Zappalà M. Evaluation of curcumin irreversibility. Nat Prod Res 2019; 34:3159-3162. [PMID: 30676764 DOI: 10.1080/14786419.2018.1557658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Santo Previti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Santina Maiorana
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Alessandro Allegra
- Division of Hematology Department of General Surgery Pathological Anatomy and Oncology, University of Messina, Messina, Italy
| | - Tanja Schirmeister
- Institute of Pharmacy and Biochemistry, University of Mainz, Mainz, DE, Germany
| | - Silvana Grasso
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Maria Zappalà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
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208
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Luca SV, Macovei I, Bujor A, Miron A, Skalicka-Woźniak K, Aprotosoaie AC, Trifan A. Bioactivity of dietary polyphenols: The role of metabolites. Crit Rev Food Sci Nutr 2019; 60:626-659. [PMID: 30614249 DOI: 10.1080/10408398.2018.1546669] [Citation(s) in RCA: 329] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A polyphenol-rich diet protects against chronic pathologies by modulating numerous physiological processes, such as cellular redox potential, enzymatic activity, cell proliferation and signaling transduction pathways. However, polyphenols have a low oral bioavailability mainly due to an extensive biotransformation mediated by phase I and phase II reactions in enterocytes and liver but also by gut microbiota. Despite low oral bioavailability, most polyphenols proved significant biological effects which brought into attention the low bioavailability/high bioactivity paradox. In recent years, polyphenol metabolites have attracted great interest as many of them showed similar or higher intrinsic biological effects in comparison to the parent compounds. There is a huge body of literature reporting on the biological functions of polyphenol metabolites generated by phase I and phase II metabolic reactions and gut microbiota-mediated biotransformation. In this respect, the review highlights the pharmacokinetic fate of the major dietary polyphenols (resveratrol, curcumin, quercetin, rutin, genistein, daidzein, ellagitannins, proanthocyanidins) in order to further address the efficacy of biometabolites as compared to parent molecules. The present work strongly supports the contribution of metabolites to the health benefits of polyphenols, thus offering a better perspective in understanding the role played by dietary polyphenols in human health.
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Affiliation(s)
- Simon Vlad Luca
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania.,Department of Pharmacognosy with Medicinal Plant Unit, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, Lublin, Poland
| | - Irina Macovei
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Alexandra Bujor
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Anca Miron
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Krystyna Skalicka-Woźniak
- Department of Pharmacognosy with Medicinal Plant Unit, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, Lublin, Poland
| | - Ana Clara Aprotosoaie
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Adriana Trifan
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
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209
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210
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Shen L, Ji HF. Bidirectional interactions between dietary curcumin and gut microbiota. Crit Rev Food Sci Nutr 2018; 59:2896-2902. [DOI: 10.1080/10408398.2018.1478388] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Liang Shen
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
| | - Hong-Fang Ji
- Institute of Biomedical Research, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, School of Life Sciences, Shandong University of Technology, Zibo, Shandong, People’s Republic of China
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211
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Joseph AI, Luis PB, Schneider C. A Curcumin Degradation Product, 7-Norcyclopentadione, Formed by Aryl Migration and Loss of a Carbon from the Heptadienedione Chain. JOURNAL OF NATURAL PRODUCTS 2018; 81:2756-2762. [PMID: 30560664 PMCID: PMC6474840 DOI: 10.1021/acs.jnatprod.8b00822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Evidence that anti-inflammatory and other biological effects of curcumin may at least in part be mediated by its metabolites underscores the importance of identifying novel transformation products. Spontaneous degradation of curcumin in buffer pH 7.5 results mainly in dioxygenated products with a characteristic cyclopentadione ring composed of carbons 2 through 6 of the former heptadienedione chain. When analyzing degradation reactions of 4'- O-methylcurcumin, a product was identified missing one of the terminal carbons of the heptadienedione moiety while containing a cyclopentadione ring and adjacent hydroxy group typical of curcumin degradation products. Analysis of curcumin autoxidation reactions showed formation of an analogous compound, 7-norcyclopentadione, a degradation product exhibiting net loss of a carbon and gain of an oxygen atom. Removal of the carbon is proposed to occur via a peroxide-linked curcumin dimer in conjunction with radical-mediated 1,2-aryl migration of a guaiacol moiety. Oxidation reactions of demethoxycurcumin gave demethoxy-7-norcyclopentadione, whereas an analogous product was not observed from bis-demethoxycurcumin. Incubation of RAW264.7 macrophage-like cells with curcumin showed the presence of 7-norcyclopentadione, the formation of which was not increased upon activation of the cells with 12- O-tetradecanoylphorbol-13-acetate . 7-Norcyclopentadione is a novel type of degradation product that is most likely formed via autoxidative processes when cells are incubated with curcumin.
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Affiliation(s)
- Akil I. Joseph
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, Tennessee 37232, United States
| | - Paula B. Luis
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, Tennessee 37232, United States
| | - Claus Schneider
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, Tennessee 37232, United States
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212
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Sorasitthiyanukarn FN, Muangnoi C, Ratnatilaka Na Bhuket P, Rojsitthisak P, Rojsitthisak P. Chitosan/alginate nanoparticles as a promising approach for oral delivery of curcumin diglutaric acid for cancer treatment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:178-190. [DOI: 10.1016/j.msec.2018.07.069] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 06/25/2018] [Accepted: 07/24/2018] [Indexed: 12/21/2022]
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213
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Li WJ, Zhang XY, Wu RT, Song YH, Xie MY. Ganoderma atrum polysaccharide improves doxorubicin-induced cardiotoxicity in mice by regulation of apoptotic pathway in mitochondria. Carbohydr Polym 2018; 202:581-590. [DOI: 10.1016/j.carbpol.2018.08.144] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 12/20/2022]
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214
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Seyed Hosseini E, Alizadeh Zarei M, Babashah S, Nakhaei Sistani R, Sadeghizadeh M, Haddad Kashani H, Amini Mahabadi J, Izadpanah F, Atlasi MA, Nikzad H. Studies on combination of oxaliplatin and dendrosomal nanocurcumin on proliferation, apoptosis induction, and long non-coding RNA expression in ovarian cancer cells. Cell Biol Toxicol 2018; 35:247-266. [DOI: 10.1007/s10565-018-09450-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 10/17/2018] [Indexed: 12/12/2022]
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215
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Bromophenol curcumin analog BCA-5 exerts an antiangiogenic effect through the HIF-1α/VEGF/Akt signaling pathway in human umbilical vein endothelial cells. Anticancer Drugs 2018; 29:965-974. [DOI: 10.1097/cad.0000000000000671] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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216
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Spaeth A, Graeler A, Maisch T, Plaetzer K. CureCuma–cationic curcuminoids with improved properties and enhanced antimicrobial photodynamic activity. Eur J Med Chem 2018; 159:423-440. [DOI: 10.1016/j.ejmech.2017.09.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 06/20/2017] [Accepted: 09/29/2017] [Indexed: 11/27/2022]
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217
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Mafra D, Gidlund EK, Borges NA, Magliano DC, Lindholm B, Stenvinkel P, von Walden F. Bioactive food and exercise in chronic kidney disease: Targeting the mitochondria. Eur J Clin Invest 2018; 48:e13020. [PMID: 30144313 DOI: 10.1111/eci.13020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 08/11/2018] [Accepted: 08/22/2018] [Indexed: 12/16/2022]
Abstract
Chronic kidney disease (CKD), which affects 10%-15% of the population, associates with a range of complications-such as cardiovascular disease, frailty, infections, muscle and bone disorders and premature ageing-that could be related to alterations of mitochondrial number, distribution, structure and function. As mitochondrial biogenesis, bioenergetics and the dynamic mitochondrial networks directly or indirectly regulate numerous intra- and extracellular functions, the mitochondria have emerged as an important target for interventions aiming at preventing or improving the treatment of complications in CKD. In this review, we discuss the possible role of bioactive food compounds and exercise in the modulation of the disturbed mitochondrial function in a uraemic milieu.
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Affiliation(s)
- Denise Mafra
- Graduate Program in Medical Sciences, Fluminense Federal University (UFF), Niterói, Rio de Janeiro, Brazil.,Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói, Rio de Janeiro, Brazil
| | - Eva-Karin Gidlund
- Division of Molecular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Natália Alvarenga Borges
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói, Rio de Janeiro, Brazil
| | - D'Angelo Carlo Magliano
- Graduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói, Rio de Janeiro, Brazil
| | - Bengt Lindholm
- Division of Renal Medicine, Department of Clinical Science Intervention and Technology, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Peter Stenvinkel
- Division of Renal Medicine, Department of Clinical Science Intervention and Technology, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Ferdinand von Walden
- Division of Pediatric Neurology, Department of Women's and Children's health, Karolinska Institutet, Stockholm, Sweden
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218
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Abbasi S, Kajimoto K, Harashima H. Critical parameters dictating efficiency of membrane-mediated drug transfer using nanoparticles. Int J Pharm 2018; 553:398-407. [PMID: 30393168 DOI: 10.1016/j.ijpharm.2018.10.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/21/2018] [Accepted: 10/17/2018] [Indexed: 12/24/2022]
Abstract
Curcumin, a low molecular weight, hydrophobic compound, exhibits strong anti-cancer effects and has a high margin of safety. However, its poor water solubility, rapid metabolism and degradation make it relatively ineffective, but intracellular delivery using nanoparticles (NPs) would solve these problems. In this study, we formulated curcumin in two-structurally distinct NPs: a nanoemulsion (Cur-NE) and a Niosome (Cur-NIO), evaluated their in-vitro cytotoxic effects and examined their mechanisms of drug delivery. The use of Cur-NIO resulted in an unexpected increase in the intracellular accumulation of curcumin and induced a potent cytotoxic effect compared to Cur-NE. To our surprise, however, the effects of the endocytosis of NIO as well as that for NE on the cellular delivery of curcumin were negligible. Consequently, we concluded that Cur-NIO delivers curcumin directly to the cytosol via transfer from the NIO to the cell membrane. The results of Förster resonance energy transfer (FRET) and phase-transfer studies indicate that Cur-NIO exhibits efficient transfer into model membranes or organic interfaces. Moreover, we found that Cur-NE shows a poor transfer efficiency. This could be due to the presence of a hydrophobic oil core that reduces the probability of curcumin to transfer upon contact with the membrane. To the best of our knowledge, this is the first study of the effect of NP structure on the membrane-mediated transfer efficiency of low molecular weight, hydrophobic compounds.
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Affiliation(s)
- Saed Abbasi
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, Hokkaido 060 0812, Japan
| | - Kazuaki Kajimoto
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu, 761-0395 Kagawa, Japan
| | - Hideyoshi Harashima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, Hokkaido 060 0812, Japan.
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Zheng B, Peng S, Zhang X, McClements DJ. Impact of Delivery System Type on Curcumin Bioaccessibility: Comparison of Curcumin-Loaded Nanoemulsions with Commercial Curcumin Supplements. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:10816-10826. [PMID: 30252460 DOI: 10.1021/acs.jafc.8b03174] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In this study, nanoemulsion-based delivery systems fabricated using three different methods were compared with three commercially available curcumin supplements. Powdered curcumin was dispersed into the oil-in-water nanoemulsions using three methods: the conventional oil-loading method, the heat-driven method, and the pH-driven method. The conventional method involved dissolving powdered curcumin in the oil phase (60 °C, 2 h) and then forming a nanoemulsion. The heat-driven method involved forming a nanoemulsion and then adding powdered curcumin and incubating at an elevated temperature (100 °C, 15 min). The pH-driven method involved dissolving curcumin in an alkaline solution (pH 12.5) and then adding this solution to an acidified nanoemulsion (pH 6.0). The three commercial curcumin products were capsules or tablets purchased from an online supplier: Nature Made, Full Spectrum, and CurcuWin. Initially, the encapsulation efficiency of the curcumin in the three nanoemulsions was determined and decreased in the following order: pH-driven (93%) > heat-driven (76%) > conventional (56%) method. The different curcumin formulations were then subjected to a simulated gastrointestinal tract (GIT) model consisting of mouth, stomach, and small intestine phases. All three nanoemulsions had fairly similar curcumin bioaccessibility values (74-79%) but the absolute amount of curcumin in the mixed micelle phase was highest for the pH-driven method. A comparison of these nanoemulsions and commercial products indicated that the curcumin concentration in the mixed micelles decreased in the following order: CurcuWin ≈ pH-driven method > heat-driven method > conventional method ≫ Full spectrum > Nature Made. This study provides valuable information about the impact of the delivery system type on curcumin bioavailability. It suggests that encapsulating curcumin within small lipid particles may be advantageous for improving its absorption form the GIT.
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Affiliation(s)
- Bingjing Zheng
- Biopolymers and Colloids Laboratory, Department of Food Science , University of Massachusetts Amherst , Amherst , Massachusetts 01003 , United States
| | - Shengfeng Peng
- Biopolymers and Colloids Laboratory, Department of Food Science , University of Massachusetts Amherst , Amherst , Massachusetts 01003 , United States
- State Key Laboratory of Food Science and Technology , Nanchang University , Nanchang 330047 Jiangxi , People's Republic of China
| | - Xiaoyun Zhang
- Biopolymers and Colloids Laboratory, Department of Food Science , University of Massachusetts Amherst , Amherst , Massachusetts 01003 , United States
| | - David Julian McClements
- Biopolymers and Colloids Laboratory, Department of Food Science , University of Massachusetts Amherst , Amherst , Massachusetts 01003 , United States
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McClements DJ. Recent developments in encapsulation and release of functional food ingredients: delivery by design. Curr Opin Food Sci 2018. [DOI: 10.1016/j.cofs.2018.06.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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221
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Khoshnevisan K, Maleki H, Samadian H, Shahsavari S, Sarrafzadeh MH, Larijani B, Dorkoosh FA, Haghpanah V, Khorramizadeh MR. Cellulose acetate electrospun nanofibers for drug delivery systems: Applications and recent advances. Carbohydr Polym 2018; 198:131-141. [DOI: 10.1016/j.carbpol.2018.06.072] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/16/2018] [Accepted: 06/14/2018] [Indexed: 01/31/2023]
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Kharat M, Zhang G, McClements DJ. Stability of curcumin in oil-in-water emulsions: Impact of emulsifier type and concentration on chemical degradation. Food Res Int 2018; 111:178-186. [DOI: 10.1016/j.foodres.2018.05.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 04/23/2018] [Accepted: 05/08/2018] [Indexed: 12/21/2022]
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Hocking AJ, Elliot D, Hua J, Klebe S. Administering Fixed Oral Doses of Curcumin to Rats through Voluntary Consumption. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2018; 57:508-512. [PMID: 30157991 DOI: 10.30802/aalas-jaalas-17-000143] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Curcumin, a polyphenol derived from turmeric, has a wide variety of therapeutic benefits including antiinflammatory, antioxidative, and chemopreventative effects. Oral gavage is widely performed to administer curcumin in laboratory rodents in several experimental models. Although effective, this method can increase stress in the animal, potentially influencing experimental results. Moreover, oral gavage can result in mortality due to accidental instillation of fluid into the lungs, serious mechanical damage, and gavage-related reflux. Here we describe a method for the administration of fixed dosages of curcumin to rats through voluntary consumption of peanut butter, to reduce gavage-related morbidity and distress to animals and to provide environmental enrichment. Fischer 344 (n = 6) rats received 1100 mg/kg of a commercial curcumin product (equivalent to approximately 200 mg/kg of curcumin) in 8 g/kg of peanut butter daily for 5 wk. Curcumin concentrations in rat plasma were measured by using UPLC-MS at 2 to 4 h after administration. All rats voluntarily consumed the peanut butter-curcumin mixture consistently over the 5-wk period. Total curcumin concentrations in plasma samples collected 2 to 4 h after curcumin consumption were 171 ± 48.4 ng/mL (mean ± 1 SD; range, 103 to 240 ng/mL). This noninvasive curcumin delivery method was effective, eliminated the stress caused by daily oral gavage, and added environmental enrichment.
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Affiliation(s)
- Ashleigh J Hocking
- Department of Anatomical Pathology, Flinders University, Flinders Medical Centre, Adelaide, South Australia;,
| | - David Elliot
- Department of Clinical Pharmacology, Flinders Medical Centre, Adelaide, South Australia
| | - Jin Hua
- Department of Anatomical Pathology, Flinders University, Flinders Medical Centre, Adelaide, South Australia
| | - Sonja Klebe
- Department of Anatomical Pathology, Flinders University, Flinders Medical Centre, Adelaide, South Australia
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225
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den Haan J, Morrema THJ, Rozemuller AJ, Bouwman FH, Hoozemans JJM. Different curcumin forms selectively bind fibrillar amyloid beta in post mortem Alzheimer's disease brains: Implications for in-vivo diagnostics. Acta Neuropathol Commun 2018; 6:75. [PMID: 30092839 PMCID: PMC6083624 DOI: 10.1186/s40478-018-0577-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 07/27/2018] [Indexed: 01/09/2023] Open
Abstract
The combined fluorescent and Aβ-binding properties of the dietary spice curcumin could yield diagnostic purpose in the search for a non-invasive Aβ-biomarker for Alzheimer's disease (AD). However, evidence on the binding properties of curcumin, its conjugates and clinically used bio-available formulations to AD neuropathological hallmarks is scarce. We therefore assessed the binding properties of different curcumin forms to different neuropathological deposits in post-mortem brain tissue of cases with AD, other neurodegenerative diseases, and controls. Post mortem brain tissue was histochemically assessed for the binding of curcumin, its isoforms, conjugates and bio-available forms and compared to routinely used staining methods. For this study we included brains of early onset AD, late onset AD, primary age-related tauopathy (PART), cerebral amyloid angiopathy (CAA), frontotemporal lobar degeneration (FTLD) with tau or TAR DNA-binding protein 43 (TDP-43) inclusions, dementia with Lewy bodies (DLB), Parkinson's disease (PD) and control cases without brain pathology. We found that curcumin binds to fibrillar amyloid beta (Aβ) in plaques and CAA. It does not specifically bind to inclusions of protein aggregates in FTLD-tau cases, TDP-43, or Lewy bodies. Curcumin isoforms, conjugates and bio-available forms show affinity for the same Aβ structures. Curcumin staining overlaps with immunohistochemical detection of Aβ in fibrillar plaques and CAA, and to a lesser extent cored plaques. A weak staining of neurofibrillary tangles was observed, while other structures immunopositive for phosphorylated tau remained negative. In conclusion, curcumin, its isoforms, conjugates and bio-available forms selectively bind fibrillar Aβ in plaques and CAA in post mortem AD brain tissue. Curcumin, being a food additive with fluorescent properties, is therefore an interesting candidate for in-vivo diagnostics in AD, for example in retinal fluorescent imaging.
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Affiliation(s)
- Jurre den Haan
- Department of Neurology, Amsterdam Neuroscience, VU University Medical Center Alzheimer Center, Mailbox 7057, 1007 MB Amsterdam, the Netherlands
| | - Tjado H. J. Morrema
- Department of Pathology, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Annemieke J. Rozemuller
- Department of Pathology, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Femke H. Bouwman
- Department of Neurology, Amsterdam Neuroscience, VU University Medical Center Alzheimer Center, Mailbox 7057, 1007 MB Amsterdam, the Netherlands
| | - Jeroen J. M. Hoozemans
- Department of Pathology, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
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226
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Vincek AS, Patel J, Jaganathan A, Green A, Pierre-Louis V, Arora V, Rehmann J, Mezei M, Zhou MM, Ohlmeyer M, Mujtaba S. Inhibitor of CBP Histone Acetyltransferase Downregulates p53 Activation and Facilitates Methylation at Lysine 27 on Histone H3. Molecules 2018; 23:molecules23081930. [PMID: 30072621 PMCID: PMC6222455 DOI: 10.3390/molecules23081930] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 12/22/2022] Open
Abstract
Tumor suppressor p53-directed apoptosis triggers loss of normal cells, which contributes to the side-effects from anticancer therapies. Thus, small molecules with potential to downregulate the activation of p53 could minimize pathology emerging from anticancer therapies. Acetylation of p53 by the histone acetyltransferase (HAT) domain is the hallmark of coactivator CREB-binding protein (CBP) epigenetic function. During genotoxic stress, CBP HAT-mediated acetylation is essential for the activation of p53 to transcriptionally govern target genes, which control cellular responses. Here, we present a small molecule, NiCur, which blocks CBP HAT activity and downregulates p53 activation upon genotoxic stress. Computational modeling reveals that NiCur docks into the active site of CBP HAT. On CDKN1A promoter, the recruitment of p53 as well as RNA Polymerase II and levels of acetylation on histone H3 were diminished by NiCur. Specifically, NiCur reduces the levels of acetylation at lysine 27 on histone H3, which concomitantly increases the levels of trimethylation at lysine 27. Finally, NiCur attenuates p53-directed apoptosis by inhibiting the Caspase 3 activity and cleavage of Poly (ADP-ribose) polymerase (PARP) in normal gastrointestinal epithelial cells. Collectively, NiCur demonstrates the potential to reprogram the chromatin landscape and modulate biological outcomes of CBP-mediated acetylation under normal and disease conditions.
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Affiliation(s)
- Adam S Vincek
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Jigneshkumar Patel
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Anbalagan Jaganathan
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
- One Bungtown Rd, Cold Spring Harbor Laboratories, Cold Spring Harbor, NY 11724, USA.
| | - Antonia Green
- Department of Physical Science, St. Joseph's College, 245 Clinton Avenue, Brooklyn, NY 11205, USA.
| | - Valerie Pierre-Louis
- Department of Physical Science, St. Joseph's College, 245 Clinton Avenue, Brooklyn, NY 11205, USA.
| | - Vimal Arora
- Department of Biology, City University of New York, Medgar Evers College, Brooklyn, NY 11225, USA.
| | - Jill Rehmann
- Department of Physical Science, St. Joseph's College, 245 Clinton Avenue, Brooklyn, NY 11205, USA.
| | - Mihaly Mezei
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Ming-Ming Zhou
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Michael Ohlmeyer
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Shiraz Mujtaba
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
- Department of Biology, City University of New York, Medgar Evers College, Brooklyn, NY 11225, USA.
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227
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Rao G, Houson H, Nkepang G, Yari H, Teng C, Awasthi V. Induction of gut proteasome activity in hemorrhagic shock and its recovery by treatment with diphenyldihaloketones CLEFMA and EF24. Am J Physiol Gastrointest Liver Physiol 2018; 315:G318-G327. [PMID: 29746173 PMCID: PMC6139642 DOI: 10.1152/ajpgi.00066.2018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 05/02/2018] [Accepted: 05/02/2018] [Indexed: 01/31/2023]
Abstract
Multiorgan failure in hemorrhagic shock is triggered by gut barrier dysfunction and consequent systemic infiltration of proinflammatory factors. Our previous study has shown that diphenyldihaloketone drugs 4-[3,5-bis[(2-chlorophenyl)methylene]-4-oxo-1-piperidinyl]-4-oxo-2-butenoic acid (CLEFMA) and 3,5-bis[(2-fluorophenyl)methylene]-4-piperidinone (EF24) restore gut barrier dysfunction and reduce systemic inflammatory response in hemorrhagic shock. We investigated the effect of hemorrhagic shock on proteasome activity of intestinal epithelium and how CLEFMA and EF24 treatments modulate proteasome function in hemorrhagic shock. CLEFMA or EF24 (0.4 mg/kg) were given 1 h after withdrawing 50% of blood from Sprague-Dawley rats; no other resuscitation was provided. After another 5 h of compensation, small gut was collected to process tissue for proteasome activity, immunoblotting, and mRNA levels of genes responsible for unfolded-protein response (XBP1, ATF4, glucose-regulated protein of 78/95 kDa, and growth arrest and DNA damage inducible genes 153/34), polyubiquitin B and C, and immunoproteasome subunits β type-8 and -10 and proteasome activator subunit 1. We found that hemorrhagic shock induced proteasome activity in gut tissue and reduced the amounts of ubiquitinated proteins displayed on antiubiquitin immunoblots. However, simultaneous induction of unfolded-protein response or immunoproteasome genes was not observed. CLEFMA and EF24 treatments abolished the hemorrhagic shock-induced increase in proteasome activity. Further investigations revealed that the induction of proteasome in hemorrhagic shock is associated with disassembly of 26S proteasome; CLEFMA and EF24 prevented this disassembly. Consistent with these data, CLEFMA and EF24 reduced hemorrhagic shock-induced degradation of 20S substrate ornithine decarboxylase in gut tissue. These results suggest that activated proteasome plays an important role in ischemic gut pathophysiology, and it can be a druggable target in shock-induced gut dysfunction. NEW & NOTEWORTHY Ischemic injury to the gut is a trigger for the systemic inflammatory response and multiple organ failure in trauma and hemorrhagic shock. We show for the first time that hemorrhagic shock induces the gut proteasome activity by engendering 26S proteasome disassembly. Diphenyldihaloketones 4-[3,5-bis[(2-chlorophenyl)methylene]-4-oxo-1-piperidinyl]-4-oxo-2-butenoic acid and 3,5-bis[(2-fluorophenyl)methylene]-4-piperidinone treatment prevented the 26S disassembly. Understanding the role of proteasome in shock-associated gut injury will assist in the development of therapeutic means to address it.
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Affiliation(s)
- Geeta Rao
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
| | - Hailey Houson
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
| | - Gregory Nkepang
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
| | - Hooman Yari
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
| | - Chengwen Teng
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
| | - Vibhudutta Awasthi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Science Center , Oklahoma City, Oklahoma
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228
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Morão LG, Polaquini CR, Kopacz M, Torrezan GS, Ayusso GM, Dilarri G, Cavalca LB, Zielińska A, Scheffers DJ, Regasini LO, Ferreira H. A simplified curcumin targets the membrane of Bacillus subtilis. Microbiologyopen 2018; 8:e00683. [PMID: 30051597 PMCID: PMC6460283 DOI: 10.1002/mbo3.683] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/19/2018] [Accepted: 06/07/2018] [Indexed: 11/21/2022] Open
Abstract
Curcumin is the main constituent of turmeric, a seasoning popularized around the world with Indian cuisine. Among the benefits attributed to curcumin are anti‐inflammatory, antimicrobial, antitumoral, and chemopreventive effects. Besides, curcumin inhibits the growth of the gram‐positive bacterium Bacillus subtilis. The anti‐B. subtilis action happens by interference with the division protein FtsZ, an ancestral tubulin widespread in Bacteria. FtsZ forms protofilaments in a GTP‐dependent manner, with the concomitant recruitment of essential factors to operate cell division. By stimulating the GTPase activity of FtsZ, curcumin destabilizes its function. Recently, curcumin was shown to promote membrane permeabilization in B. subtilis. Here, we used molecular simplification to dissect the functionalities of curcumin. A simplified form, in which a monocarbonyl group substituted the β‐diketone moiety, showed antibacterial action against gram‐positive and gram‐negative bacteria of clinical interest. The simplified curcumin also disrupted the divisional septum of B. subtilis; however, subsequent biochemical analysis did not support a direct action on FtsZ. Our results suggest that the simplified curcumin exerted its function mainly through membrane permeabilization, with disruption of the membrane potential necessary for FtsZ intra‐cellular localization. Finally, we show here experimental evidence for the requirement of the β‐diketone group of curcumin for its interaction with FtsZ.
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Affiliation(s)
- Luana G Morão
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, Brazil
| | - Carlos R Polaquini
- Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Malgorzata Kopacz
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Guilherme S Torrezan
- Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Gabriela M Ayusso
- Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Guilherme Dilarri
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, Brazil
| | - Lúcia B Cavalca
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, Brazil
| | - Aleksandra Zielińska
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Dirk-Jan Scheffers
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Luis O Regasini
- Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Henrique Ferreira
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, Brazil
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229
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Shen L, Jiang HH, Ji HF. Is boiled food spice curcumin still biologically active? An experimental exploration. Food Nutr Res 2018; 62:1397. [PMID: 29942246 PMCID: PMC6013419 DOI: 10.29219/fnr.v62.1397] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/22/2018] [Accepted: 05/29/2018] [Indexed: 02/01/2023] Open
Abstract
Background As the major active component of turmeric (Curcuma longa), curcumin is widely used as a spice and food coloring agent, and also possesses multiple biological activities and therapeutic potential for neurodegenerative diseases. To answer the paradox between curcumin’s biological activities and poor systemic bioavailability, we proposed that degradation products of curcumin may make important contributions to its biological activities, which needs to be verified. In addition, curcumin is usually heated or boiled used as a spice, it is necessary to explore whether boiled curcumin, which degrades readily, is still biologically active. Methods Thus, in the present study we investigated the protective effects of curcumin and boiled curcumin mixture on H2O2-induced oxidative damage in PC12 cells, a widely used model for neurons. Results Results showed that in spite of high degradation rates, boiled curcumin mixture still possessed similar protective activities like parent curcumin, and could effectively rescue PC12 cells against H2O2-induced damage, via decreasing production of reactive oxygen species and malondialdehyde, reducing caspase-3 and caspase-9 activities. Moreover, curcumin’s degradation products including ferulic acid, vanillin and vanillic acid could also improve PC12 cells survival rate. Conclusion Our findings indicated that boiled curcumin mixtures still possessed protective activity for PC12 cells, and supported the contribution of degradation products to biological activities of curcumin.
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Affiliation(s)
- Liang Shen
- Institute of Biomedical Research, Shandong University of Technology, Zibo, China.,Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Shandong University of Technology, Zibo, China
| | - Hui-Hui Jiang
- Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Shandong University of Technology, Zibo, China
| | - Hong-Fang Ji
- Institute of Biomedical Research, Shandong University of Technology, Zibo, China.,Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Shandong University of Technology, Zibo, China
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230
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Dhir A. Curcumin in epilepsy disorders. Phytother Res 2018; 32:1865-1875. [PMID: 29917276 DOI: 10.1002/ptr.6125] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/01/2018] [Accepted: 05/11/2018] [Indexed: 12/20/2022]
Abstract
Curcumin, a principal curcuminoid present in turmeric, has an antioxidant, anti-inflammatory and neuroprotective properties. Preclinical studies have indicated its beneficial effect for the treatment of epilepsy disorders. The molecule has an anti-seizure potential in preclinical studies, including chemical and electrical models of acute and chronic epilepsy. Curcumin also possesses an anti-epileptogenic activity as it reduces spontaneous recurrent seizures severity in a kainate model of temporal lobe epilepsy. The antioxidant and anti-inflammatory nature of curcumin might be responsible for its observed anti-seizure effects; nevertheless, the exact mechanism is not yet clear. The poor availability of curcumin to the brain limits its use in clinics. The application of nanoliposome and liposome technologies has been tested to enhance its brain availability and penetrability. Unfortunately, there are no randomized, double-blinded controlled clinical trials validating the use of curcumin in epilepsy. The present article analyzes different preclinical evidence illustrating the effect of curcumin in seizure models. The review encourages carrying out clinical trials in this important area of research. In conclusion, curcumin might be beneficial in patients with epilepsy disorders, if its bioavailability issues are resolved.
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Affiliation(s)
- Ashish Dhir
- Department of Neurology, School of Medicine, University of California, Davis, CA, 95817
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231
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Dietary Intake of Curcumin Improves eIF2 Signaling and Reduces Lipid Levels in the White Adipose Tissue of Obese Mice. Sci Rep 2018; 8:9081. [PMID: 29899429 PMCID: PMC5998036 DOI: 10.1038/s41598-018-27105-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 05/23/2018] [Indexed: 12/13/2022] Open
Abstract
White adipose tissue (eWAT) plays a crucial role in preventing metabolic syndrome. We aimed to investigate WAT distribution and gene expression and lipidomic profiles in epididymal WAT (eWAT) in diet-induced obese mice, reflecting a Western-style diet of humans to elucidate the bioactive properties of the dietary antioxidant curcumin in preventing lifestyle-related diseases. For 16 weeks, we fed C57BL/6J mice with a control diet, a high-fat, high-sucrose and high-cholesterol Western diet or Western diet supplemented with 0.1% (w/w) curcumin. Although the dietary intake of curcumin did not affect eWAT weight or plasma lipid levels, it reduced lipid peroxidation markers’ levels in eWAT. Curcumin accumulated in eWAT and changed gene expressions related to eukaryotic translation initiation factor 2 (eIF2) signalling. Curcumin suppressed eIF2α phosphorylation, which is induced by endoplasmic reticulum (ER) stress, macrophage accumulation and nuclear factor-κB (NF-κB) p65 and leptin expression, whereas it’s anti-inflammatory effect was inadequate to decrease TNF-α and IFN-γ levels. Lipidomic and gene expression analysis revealed that curcumin decreased some diacylglycerols (DAGs) and DAG-derived glycerophospholipids levels by suppressing the glycerol-3-phosphate acyltransferase 1 and adipose triglyceride lipase expression, which are associated with lipogenesis and lipolysis, respectively. Presumably, these intertwined effects contribute to metabolic syndrome prevention by dietary modification.
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232
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Curcumin as Treatment for Bladder Cancer: A Preclinical Study of Cyclodextrin-Curcumin Complex and BCG as Intravesical Treatment in an Orthotopic Bladder Cancer Rat Model. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9634902. [PMID: 29984253 PMCID: PMC6015703 DOI: 10.1155/2018/9634902] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/09/2018] [Indexed: 12/14/2022]
Abstract
Objective To evaluate the antitumor effect of cyclodextrin-curcumin complex (CDC) on human and rat urothelial carcinoma cells in vitro and to evaluate the effect of intravesical instillations of CDC, BCG, and the combination in vivo in the AY-F344 orthotopic bladder cancer rat model. Curcumin has anticarcinogenic activity on urothelial carcinoma and is therefore under investigation for the treatment of non-muscle invasive bladder cancer. Curcumin and BCG share immunomodulating pathways against urothelial carcinoma. Methods Curcumin was complexed with cyclodextrin to improve solubility. Four human urothelial carcinoma cell lines and the AY-27 rat cell line were exposed to various concentrations of CDC in vitro. For the in vivo experiment, the AY-27 orthotopic bladder cancer F344 rat model was used. Rats were treated with consecutive intravesical instillations of CDC, BCG, the combination of CDC+BCG, or NaCl as control. Results CDC showed a dose-dependent antiproliferative effect on all human urothelial carcinoma cell lines tested and the rat AY-27 urothelial carcinoma cell line. Moreover, intravesical treatment with CDC and CDC+BCG results in a lower percentage of tumors (60% and 68%, respectively) compared to BCG (75%) or control (85%). This difference with placebo was not statistically significant (p=0.078 and 0.199, respectively). However, tumors present in the placebo and BCG-treated rats were generally of higher stage. Conclusions Cyclodextrin-curcumin complex showed an antiproliferative effect on human and rat urothelial carcinoma cell lines in vitro. In the aggressive orthotopic bladder cancer rat model, we observed a promising effect of CDC treatment and CDC in combination with BCG.
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Zhang L, Cheng X, Xu S, Bao J, Yu H. Curcumin induces endoplasmic reticulum stress-associated apoptosis in human papillary thyroid carcinoma BCPAP cells via disruption of intracellular calcium homeostasis. Medicine (Baltimore) 2018; 97:e11095. [PMID: 29901626 PMCID: PMC6023948 DOI: 10.1097/md.0000000000011095] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Thyroid cancer is the most common endocrine tumor. Our previous studies have demonstrated that curcumin can induce apoptosis in human papillary thyroid carcinoma BCPAP cells. However, the underlined mechanism has not been clearly elucidated. Endoplasmic reticulum (ER) is a major organelle for synthesis, maturation, and folding proteins as well as a large store for Ca. Overcoming chronically activated ER stress by triggering pro-apoptotic pathways of the unfolded protein response (UPR) is a novel strategy for cancer therapeutics. Our study aimed to uncover the ER stress pathway involved in the apoptosis caused by curcumin. METHODS BCPAP cells were treated with different doses of curcumin (12.5-50 μM). Annexin V/PI double staining was used to determine cell apoptosis. Rhod-2/AM calcium fluorescence probe assay was performed to measure the calcium level of endoplasmic reticulum. Western blot was used to examine the expression of ER stress marker C/EBP homologous protein 10 (CHOP) and glucose-regulated protein 78 (GRP78). X-box binding protein1 (XBP-1) spliced form was examined by reverse transcriptase-polymerase chain reaction (RT-PCR). RESULTS Curcumin significantly inhibited anchorage-independent cell growth and induced apoptosis in BCPAP cells. Curcumin induced ER stress and UPR responses in a dose- and time-dependent manner, and the chemical chaperone 4-phenylbutyrate (4-PBA) partially reversed the antigrowth activity of curcumin. Moreover, curcumin significantly increased inositol-requiring enzyme 1α (IRE1α) phosphorylation and XBP-1 mRNA splicing to induce a subsets of ER chaperones. Increased cleavage of activating transcription factor 6 (ATF6), which enhances expression of its downstream target CHOP was also observed. Furthermore, curcumin induced intracellular Ca influx through inhibition of the sarco-endoplasmic reticulum ATPase 2A (SERCA2) pump. The increased cytosolic Ca then bound to calmodulin to activate calcium/calmodulin-dependent protein kinase II (CaMKII) signaling, leading to mitochondrial apoptosis pathway activation. Ca chelator BAPTA partially reversed curcumin-induced ER stress and growth suppression, confirming the possible involvement of calcium homeostasis disruption in this response. CONCLUSIONS Curcumin inhibits thyroid cancer cell growth, at least partially, through ER stress-associated apoptosis. Our observations provoked that ER stress activation may be a promising therapeutic target for thyroid cancer treatment.(Figure is included in full-text article.).
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Fabrication and characterization of protein-phenolic conjugate nanoparticles for co-delivery of curcumin and resveratrol. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.01.017] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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235
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Pluronics modified liposomes for curcumin encapsulation: Sustained release, stability and bioaccessibility. Food Res Int 2018; 108:246-253. [DOI: 10.1016/j.foodres.2018.03.048] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/06/2018] [Accepted: 03/15/2018] [Indexed: 11/23/2022]
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Maiti P, Dunbar GL. Use of Curcumin, a Natural Polyphenol for Targeting Molecular Pathways in Treating Age-Related Neurodegenerative Diseases. Int J Mol Sci 2018; 19:E1637. [PMID: 29857538 PMCID: PMC6032333 DOI: 10.3390/ijms19061637] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/02/2018] [Accepted: 05/25/2018] [Indexed: 12/27/2022] Open
Abstract
Progressive accumulation of misfolded amyloid proteins in intracellular and extracellular spaces is one of the principal reasons for synaptic damage and impairment of neuronal communication in several neurodegenerative diseases. Effective treatments for these diseases are still lacking but remain the focus of much active investigation. Despite testing several synthesized compounds, small molecules, and drugs over the past few decades, very few of them can inhibit aggregation of amyloid proteins and lessen their neurotoxic effects. Recently, the natural polyphenol curcumin (Cur) has been shown to be a promising anti-amyloid, anti-inflammatory and neuroprotective agent for several neurodegenerative diseases. Because of its pleotropic actions on the central nervous system, including preferential binding to amyloid proteins, Cur is being touted as a promising treatment for age-related brain diseases. Here, we focus on molecular targeting of Cur to reduce amyloid burden, rescue neuronal damage, and restore normal cognitive and sensory motor functions in different animal models of neurodegenerative diseases. We specifically highlight Cur as a potential treatment for Alzheimer's, Parkinson's, Huntington's, and prion diseases. In addition, we discuss the major issues and limitations of using Cur for treating these diseases, along with ways of circumventing those shortcomings. Finally, we provide specific recommendations for optimal dosing with Cur for treating neurological diseases.
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Affiliation(s)
- Panchanan Maiti
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
- Department of Biology, Saginaw Valley State University, Saginaw, MI 48610, USA.
- Brain Research Laboratory, Saginaw Valley State University, Saginaw, MI 48610, USA.
| | - Gary Leo Dunbar
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
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Siddiqui FA, Prakasam G, Chattopadhyay S, Rehman AU, Padder RA, Ansari MA, Irshad R, Mangalhara K, Bamezai RNK, Husain M, Ali SM, Iqbal MA. Curcumin decreases Warburg effect in cancer cells by down-regulating pyruvate kinase M2 via mTOR-HIF1α inhibition. Sci Rep 2018; 8:8323. [PMID: 29844464 PMCID: PMC5974195 DOI: 10.1038/s41598-018-25524-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 04/18/2018] [Indexed: 12/21/2022] Open
Abstract
Warburg effect is an emerging hallmark of cancer cells with pyruvate kinase M2 (PKM2) as its key regulator. Curcumin is an extensively-studied anti-cancer compound, however, its role in affecting cancer metabolism remains poorly understood. Herein, we show that curcumin inhibits glucose uptake and lactate production (Warburg effect) in a variety of cancer cell lines by down-regulating PKM2 expression, via inhibition of mTOR-HIF1α axis. Stable PKM2 silencing revealed that PKM2 is required for Warburg effect and proliferation of cancer cells. PKM2 over-expression abrogated the effects of curcumin, demonstrating that inhibition of Warburg effect by curcumin is PKM2-mediated. High PKM2 expression correlated strongly with poor overall survival in cancer, suggesting the requirement of PKM2 in cancer progression. The study unravels novel PKM2-mediated inhibitory effect of curcumin on metabolic capacities of cancer cells. To the best of our knowledge, this is the first study linking curcumin with PKM2-driven cancer glycolysis, thus, providing new perspectives into the mechanism of its anticancer activity.
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Affiliation(s)
- Farid Ahmad Siddiqui
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Gopinath Prakasam
- School of Life Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi, 110067, India
| | - Shilpi Chattopadhyay
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard (Deemed University), New Delhi, 110062, India
| | - Asad Ur Rehman
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
- Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Rayees Ahmad Padder
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Mohammad Afaque Ansari
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Rasha Irshad
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Kailash Mangalhara
- School of Life Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi, 110067, India
| | - Rameshwar N K Bamezai
- School of Life Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi, 110067, India
| | - Mohammad Husain
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Syed Mansoor Ali
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India
| | - Mohammad Askandar Iqbal
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi, 110025, India.
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Joseph AI, Edwards RL, Luis PB, Presley SH, Porter NA, Schneider C. Stability and anti-inflammatory activity of the reduction-resistant curcumin analog, 2,6-dimethyl-curcumin. Org Biomol Chem 2018; 16:3273-3281. [PMID: 29664496 PMCID: PMC5932260 DOI: 10.1039/c8ob00639c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The efficacy of the curry spice compound curcumin as a natural anti-inflammatory agent is limited by its rapid reductive metabolism in vivo. A recent report described a novel synthetic derivative, 2,6-dimethyl-curcumin, with increased stability against reduction in vitro and in vivo. It is also known that curcumin is unstable at physiological pH in vitro and undergoes rapid autoxidative transformation. Since the oxidation products may contribute to the biological effects of curcumin, we tested oxidative stability of 2,6-dimethyl-curcumin in buffer (pH 7.5). The rate of degradation was similar to curcumin. The degradation products were identified as a one-carbon chain-shortened alcohol, vanillin, and two isomeric epoxides that underwent cleavage to vanillin and a corresponding hydroxylated cleavage product. 2,6-Dimethyl-curcumin was more potent than curcumin in inhibiting NF-κB activity but less potent in inhibiting expression of cyclooxygenase-2 in LPS-activated RAW264.7 cells. 2,6-Dimethyl-curcumin and some of its degradation products covalently bound to a peptide that contains the redox-sensitive cysteine of IKKβ kinase, the activating kinase upstream of NF-κB, providing a mechanism for the anti-inflammatory activity. In RAW264.7 cells vanillin, the chain-shortened alcohol, and reduced 2,6-dimethyl-curcumin were detected as major metabolites. These studies provide new insight into the oxidative transformation mechanism of curcumin and related compounds. The products resulting from oxidative transformation contribute to the anti-inflammatory activity of 2,6-dimethyl-curcumin in addition to its enhanced resistance against enzymatic reduction.
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Affiliation(s)
- Akil I Joseph
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Ryan Wolf J, Heckler CE, Guido JJ, Peoples AR, Gewandter JS, Ling M, Vinciguerra VP, Anderson T, Evans L, Wade J, Pentland AP, Morrow GR. Oral curcumin for radiation dermatitis: a URCC NCORP study of 686 breast cancer patients. Support Care Cancer 2018; 26:1543-1552. [PMID: 29192329 PMCID: PMC5876157 DOI: 10.1007/s00520-017-3957-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 11/03/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE Despite advances in medical technology, radiation dermatitis occurs in 95% of patients receiving radiation therapy (RT) for cancer. Currently, there is no standard and effective treatment for the prevention or control of radiation dermatitis. The goal of the study was to determine the efficacy of oral curcumin, one of the biologically active components in turmeric, at reducing radiation dermatitis severity (RDS) at the end of RT, using the RDS scale, compared to placebo. METHODS This was a multisite, randomized, double-blinded, placebo-controlled trial of 686 breast cancer patients. Patients took four 500-mg capsules of placebo or curcumin three times daily throughout their prescribed course of RT until 1 week post-RT. RESULTS A total of 686 patients were included in the final analyses (87.5% white females, mean age = 58). Linear mixed-model analyses demonstrated that curcumin did not reduce radiation dermatitis severity at the end of RT compared to placebo (B (95% CI) = 0.044 (- 0.101, 0.188), p = 0.552). Fewer curcumin patients with RDS > 3.0 suggested a trend toward reduced severity (7.4 vs. 12.9%, p = 0.082). Patient-reported changes in pain, symptoms, and quality of life were not statistically significant between arms. CONCLUSIONS Oral curcumin did not significantly reduce radiation dermatitis severity compared to placebo. The skin rating variation and broad eligibility criteria could not account for the undetectable therapeutic effect. An objective measure for radiation dermatitis severity and further exploration for an effective treatment for radiation dermatitis is warranted.
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Affiliation(s)
- Julie Ryan Wolf
- Department of Dermatology, University of Rochester Medical Center, 601 Elmwood Ave, Box 697, Rochester, NY, 14642, USA.
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, NY, USA.
- URCC NCORP Research Base, University of Rochester Medical Center, Rochester, NY, USA.
| | - Charles E Heckler
- URCC NCORP Research Base, University of Rochester Medical Center, Rochester, NY, USA
- Department of Surgery, University of Rochester Medical Center, Rochester, NY, USA
| | - Joseph J Guido
- URCC NCORP Research Base, University of Rochester Medical Center, Rochester, NY, USA
- Department of Surgery, University of Rochester Medical Center, Rochester, NY, USA
| | - Anita R Peoples
- URCC NCORP Research Base, University of Rochester Medical Center, Rochester, NY, USA
| | - Jennifer S Gewandter
- Department of Anesthesiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Marilyn Ling
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, NY, USA
| | | | | | - Lisa Evans
- Southeast Clinical Oncology Research Consortium, Winston-Salem, NC, USA
| | | | - Alice P Pentland
- Department of Dermatology, University of Rochester Medical Center, 601 Elmwood Ave, Box 697, Rochester, NY, 14642, USA
| | - Gary R Morrow
- URCC NCORP Research Base, University of Rochester Medical Center, Rochester, NY, USA
- Department of Surgery, University of Rochester Medical Center, Rochester, NY, USA
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Khanji AN, Michaux F, Salameh D, Rizk T, Banon S, Jasniewski J. The study of curcumin interaction with micellar casein and lactic acid bacteria cell envelope. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.01.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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241
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Luis PB, Boeglin WE, Schneider C. Thiol Reactivity of Curcumin and Its Oxidation Products. Chem Res Toxicol 2018; 31:269-276. [PMID: 29569909 DOI: 10.1021/acs.chemrestox.7b00326] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The polypharmacological effects of the turmeric compound curcumin may be partly mediated by covalent adduction to cellular protein. Covalent binding to small molecule and protein thiols is thought to occur through a Michael-type addition at the enone moiety of the heptadienedione chain connecting the two methoxyphenol rings of curcumin. Here we show that curcumin forms the predicted thiol-Michael adducts with three model thiols, glutathione, N-acetylcysteine, and β-mercaptoethanol. More abundant, however, are respective thiol adducts of the dioxygenated spiroepoxide intermediate of curcumin autoxidation. Two electrophilic sites at the quinone-like ring of the spiroepoxide are identified. Addition of β-mercaptoethanol at the 5'-position of the ring gives a 1,7-dihydroxycyclopentadione-5' thioether, and addition at the 1'-position results in cleavage of the aromatic ring from the molecule, forming methoxyphenol-thioether and a tentatively identified cyclopentadione aldehyde. The curcuminoids demethoxy- and bisdemethoxycurcumin do not form all of the possible thioether adducts, corresponding with their increased stability toward autoxidation. RAW264.7 macrophage-like cells activated with phorbol ester form curcumin-glutathionyl and the 1,7-dihydroxycyclopentadione-5'-glutathionyl adducts. These studies indicate that the enone of the parent compound is not the only functional electrophile in curcumin, and that its oxidation products provide additional electrophilic sites. This suggests that protein binding by curcumin may involve oxidative activation into reactive quinone methide and spiroepoxide electrophiles.
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Affiliation(s)
- Paula B Luis
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology , Vanderbilt University Medical School , Nashville , Tennessee 37232 , United States
| | - William E Boeglin
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology , Vanderbilt University Medical School , Nashville , Tennessee 37232 , United States
| | - Claus Schneider
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology , Vanderbilt University Medical School , Nashville , Tennessee 37232 , United States
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Co-nanoencapsulation of antimalarial drugs increases their in vitro efficacy against Plasmodium falciparum and decreases their toxicity to Caenorhabditis elegans. Eur J Pharm Sci 2018; 118:1-12. [PMID: 29550283 DOI: 10.1016/j.ejps.2018.03.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 03/05/2018] [Accepted: 03/13/2018] [Indexed: 02/03/2023]
Abstract
Drugs used for the treatment and prevention of malaria have resistance-related problems, making them ineffective for monotherapy. If properly associated, many of these antimalarial drugs may find their way back to the treatment regimen. Among the therapeutic arsenal, quinine (QN) is a second-line treatment for uncomplicated malaria but has side effects that limit its use. Curcumin (CR) is a natural compound with anti-plasmodial activities and low bioavailability. In this context, the aim of this work was to develop and characterize co-encapsulated QN + CR-loaded polysorbate-coated polymeric nanocapsules (NC-QC) to evaluate their activity on Plasmodium falciparum and the safety of the nanoformulations for Caenorhabditis elegans. NC-QC displayed a diameter of approximately 200 nm, a negative zeta potential and a slightly basic pH. The drugs are homogeneously distributed in the NCs in the amorphous form. Co-encapsulated NCs exhibited a significant reduction in P. falciparum parasitemia, better than QN/CR. The worms exposed to NC-QC showed higher survival and longevity and no decrease in their reproductive capacity compared to free and associated drugs. It was possible to prove that the NCs were absorbed orally by the worms using fluorescence microscopy. Co-encapsulation of QN and CR was effective against P. falciparum, minimizing the toxic effects caused by chronic exposure of the free drugs in C. elegans.
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243
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Peng S, Li Z, Zou L, Liu W, Liu C, McClements DJ. Improving curcumin solubility and bioavailability by encapsulation in saponin-coated curcumin nanoparticles prepared using a simple pH-driven loading method. Food Funct 2018. [PMID: 29517797 DOI: 10.1039/c7fo01814b] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Curcumin is a bioactive phytochemical that can be utilized as a nutraceutical or pharmaceutical in functional foods, supplements, and medicines. However, the application of curcumin as a nutraceutical in commercial food and beverage products is currently limited by its low water-solubility, chemical instability, and poor oral bioavailability. In this study, all-natural colloidal delivery systems were developed to overcome these challenges, which consisted of saponin-coated curcumin nanoparticles formed using a pH-driven loading method. The physicochemical and structural properties of the curcumin nanoparticles formed using this process were characterized, including particle size distribution, surface potential, morphology, encapsulation efficiency, and loading capacity. Fourier transform infrared spectroscopy and X-ray diffraction indicated that curcumin was present in the nanoparticles in an amorphous form. The curcumin nanoparticles were unstable to aggregation at low pH values (<3) and high NaCl concentrations (>200 mM), which was attributed to a reduction in electrostatic repulsion between them. However, they were stable at higher pH values (3 to 8) and lower NaCl levels (0 to 200 mM), due to a stronger electrostatic repulsion between them. They also exhibited good stability during refrigerated storage (4 °C) or after conversion into a powdered form (lyophilized). A simulated gastrointestinal tract study demonstrated that the in vitro bioaccessibility was around 3.3-fold higher for curcumin nanoparticles than for free curcumin. Furthermore, oral administration to Sprague Dawley rats indicated that the in vivo bioavailability was around 8.9-fold higher for curcumin nanoparticles than for free curcumin. These results have important implications for the development of curcumin-enriched functional foods, supplements, and drugs.
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Affiliation(s)
- Shengfeng Peng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, PR China.
| | - Ziling Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, PR China. and School of Life Science, Jiangxi Science and Technology Normal University, Nanchang, 330013, Jiangxi, PR China
| | - Liqiang Zou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, PR China.
| | - Wei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, PR China.
| | - Chengmei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, PR China.
| | - David Julian McClements
- Biopolymers and Colloids Laboratory, Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA.
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Liu Y, Siard M, Adams A, Keowen ML, Miller TK, Garza F, Andrews FM, Seeram NP. Simultaneous quantification of free curcuminoids and their metabolites in equine plasma by LC-ESI-MS/MS. J Pharm Biomed Anal 2018. [PMID: 29529492 DOI: 10.1016/j.jpba.2018.03.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The human health benefits attributed to turmeric/curcumin spice has resulted in its wide utilization as a dietary supplement for companion pets and other animals including horses. While the quantification of free curcuminoids (curcumin, demethoxycurcumin, bisdemethoxycurcumin) and their phase-2 metabolites (curcumin-O-sulfate, curcumin-O-glucuronide) have been extensively investigated in human and rodent biological samples (primarily plasma and serum), there is lack of similar data for horses. Herein, we report a validated LC-ESI-MS/MS method for the simultaneous quantification of the aforementioned free curcuminoids and their metabolites in equine plasma. The linearity of the aforementioned curcuminoids and curcumin-O-sulfate was in the range of 0.5-1000 ng/mL and 1-1000 ng/mL for curcumin-O-glucuronide with 85-115% accuracy and <15% precision in equine plasma. The method was validated based on US FDA criteria and applied to characterize the pharmacokinetics of curcumin-O-sulfate in equine plasma.
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Affiliation(s)
- Yongqiang Liu
- Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Road, Kingston, RI, 02881, USA
| | - Melissa Siard
- Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, 1400 Nicholasville Road, Lexington, KY, 40546, USA
| | - Amanda Adams
- Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, 1400 Nicholasville Road, Lexington, KY, 40546, USA
| | - Michael L Keowen
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, Louisiana State University School of Veterinary Medicine, Skip Bertman Drive, 1843 Veterinary Teaching Hospital, Baton Rouge, LA, 70803, USA
| | - Travis K Miller
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, Louisiana State University School of Veterinary Medicine, Skip Bertman Drive, 1843 Veterinary Teaching Hospital, Baton Rouge, LA, 70803, USA
| | - Frank Garza
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, Louisiana State University School of Veterinary Medicine, Skip Bertman Drive, 1843 Veterinary Teaching Hospital, Baton Rouge, LA, 70803, USA
| | - Frank M Andrews
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, Louisiana State University School of Veterinary Medicine, Skip Bertman Drive, 1843 Veterinary Teaching Hospital, Baton Rouge, LA, 70803, USA
| | - Navindra P Seeram
- Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Road, Kingston, RI, 02881, USA.
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Lammer AD, Thiabaud G, Brewster JT, Alaniz J, Bender JA, Sessler JL. Lanthanide Texaphyrins as Photocatalysts. Inorg Chem 2018; 57:3458-3464. [PMID: 29498834 DOI: 10.1021/acs.inorgchem.8b00248] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron D. Lammer
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - Grégory Thiabaud
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - James T. Brewster
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - Julie Alaniz
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - Jon A. Bender
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - Jonathan L. Sessler
- Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States
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246
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Jin T, Song Z, Weng J, Fantus IG. Curcumin and other dietary polyphenols: potential mechanisms of metabolic actions and therapy for diabetes and obesity. Am J Physiol Endocrinol Metab 2018; 314:E201-E205. [PMID: 29089337 DOI: 10.1152/ajpendo.00285.2017] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Recent controversy regarding the therapeutic potential of curcumin indicates the challenges to research in this field. Here, we highlight the investigations of curcumin and other plant-derived polyphenols that demonstrate their application to metabolic diseases, in particular, obesity and diabetes. Thus, a number of preclinical and clinical investigations have shown the beneficial effect of curcumin (and other dietary polyphenols) in attenuating body weight gain, improving insulin sensitivity, and preventing diabetes development in rodent models and prediabetic subjects. Other intervention studies with dietary polyphenols have also found improvements in insulin resistance. Recent studies suggest that the metabolic effects of curcumin/polyphenols are linked to changes in the gut microbiota. Thus, research into curcumin continues to provide novel insights into metabolic regulation that may ultimately translate into effective therapy.
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Affiliation(s)
- Tianru Jin
- Department of Physiology, University of Toronto , Toronto, Ontario , Canada
- Banting and Best Diabetes Centre, University of Toronto , Toronto, Ontario , Canada
- Division of Advanced Diagnostics, Toronto General Research Institute, University Health Network , Toronto, Ontario , Canada
| | - Zhuolun Song
- Department of Physiology, University of Toronto , Toronto, Ontario , Canada
- Division of Advanced Diagnostics, Toronto General Research Institute, University Health Network , Toronto, Ontario , Canada
| | - Jianping Weng
- Department of Endocrinology and Metabolism, Third Affiliated Hospital, Sun Yat-Sen University, Guangdong Sheng, China
| | - I George Fantus
- Department of Physiology, University of Toronto , Toronto, Ontario , Canada
- Banting and Best Diabetes Centre, University of Toronto , Toronto, Ontario , Canada
- Division of Advanced Diagnostics, Toronto General Research Institute, University Health Network , Toronto, Ontario , Canada
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital , Toronto, Ontario , Canada
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247
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Azevedo M, Leite IB, Queiroz C, Fialho E. Spiced risotto: cooking processing and simulated in vitro digestion on curcuminoids, capsaicin and piperine. JOURNAL OF CULINARY SCIENCE & TECHNOLOGY 2018. [DOI: 10.1080/15428052.2018.1429973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Marcelo Azevedo
- Gastronomia, Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Iris Batista Leite
- Departamento de Nutrição Básica e Experimental, Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Christiane Queiroz
- Departamento de Nutrição, Universidade Federal do Paraná, Curitiba, Brasil
| | - Elaine Fialho
- Departamento de Nutrição Básica e Experimental, Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
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248
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Peng S, Li Z, Zou L, Liu W, Liu C, McClements DJ. Enhancement of Curcumin Bioavailability by Encapsulation in Sophorolipid-Coated Nanoparticles: An in Vitro and in Vivo Study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:1488-1497. [PMID: 29378117 DOI: 10.1021/acs.jafc.7b05478] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
There is great interest in developing colloidal delivery systems to enhance the water solubility and oral bioavailability of curcumin, which is a hydrophobic nutraceutical claimed to have several health benefits. In this study, a natural emulsifier was used to form sophorolipid-coated curcumin nanoparticles. The curcumin was loaded into sophorolipid micelles using a pH-driven mechanism based on the decrease in curcumin solubility at lower pH values. The sophorolipid-coated curcumin nanoparticles formed using this mechanism were relatively small (61 nm) and negatively charged (-41 mV). The nanoparticles also had a relatively high encapsulation efficiency (82%) and loading capacity (14%) for curcumin, which was present in an amorphous state. Both in vitro and in vivo studies showed that the curcumin nanoparticles had an appreciably higher bioavailability than that of free curcumin crystals (2.7-3.6-fold), which was mainly attributed to their higher bioaccessibility. These results may facilitate the development of natural colloidal systems that enhance the oral bioavailability and bioactivity of curcumin in food, dietary supplements, and pharmaceutical products.
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Affiliation(s)
- Shengfeng Peng
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, 330047 Jiangxi, P.R. China
| | - Ziling Li
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, 330047 Jiangxi, P.R. China
- School of Life Science, Jiangxi Science and Technology Normal University , Nanchang, 330013 Jiangxi, P.R. China
| | - Liqiang Zou
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, 330047 Jiangxi, P.R. China
| | - Wei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, 330047 Jiangxi, P.R. China
| | - Chengmei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, 330047 Jiangxi, P.R. China
| | - David Julian McClements
- Biopolymers and Colloids Laboratory, Department of Food Science, University of Massachusetts , Amherst, Massachusetts 01003, United States
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Abstract
Apoptosis, the cell’s natural mechanism for death, is a promising target for anticancer therapy. Both the intrinsic and extrinsic pathways use caspases to carry out apoptosis through the cleavage of hundreds of proteins. In cancer, the apoptotic pathway is typically inhibited through a wide variety of means including overexpression of antiapoptotic proteins and under-expression of proapoptotic proteins. Many of these changes cause intrinsic resistance to the most common anticancer therapy, chemotherapy. Promising new anticancer therapies are plant-derived compounds that exhibit anticancer activity through activating the apoptotic pathway.
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250
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Extraction of curcuminoids by using ethyl lactate and its optimisation by response surface methodology. J Pharm Biomed Anal 2018; 149:89-95. [DOI: 10.1016/j.jpba.2017.10.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 10/28/2017] [Accepted: 10/30/2017] [Indexed: 12/23/2022]
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