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Chen L, Wang J, Yang Y, Wang H, Xu A, Ma J, Wang Y, Xu P. Identifying the temporal contributors and their interactions during dynamic formation of black tea cream. Food Chem 2024; 448:139138. [PMID: 38569407 DOI: 10.1016/j.foodchem.2024.139138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 03/05/2024] [Accepted: 03/24/2024] [Indexed: 04/05/2024]
Abstract
Tea cream formed in hot and strong tea infusion while cooling deteriorates quality and health benefits of tea. However, the interactions among temporal contributors during dynamic formation of tea cream are still elusive. Here, by deletional recombination experiments and molecular dynamics simulation, it was found that proteins, caffeine (CAF), and phenolics played a dominant role throughout the cream formation, and the contribution of amino acids was highlighted in the early stage. Furthermore, CAF was prominent due to its extensive binding capacity and the filling complex voids property, and caffeine-theaflavins (TFs) complexation may be the core skeleton of the growing particles in black tea infusion. In addition to TFs, the unidentified phenolic oxidation-derived products (PODP) were confirmed to contribute greatly to the cream formation.
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Affiliation(s)
- Lin Chen
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Jingyi Wang
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Yijun Yang
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Huajie Wang
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Anan Xu
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Junhui Ma
- Lishui Agriculture and Rural Affairs Bureau, Lishui 323000, China
| | - Yuefei Wang
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Ping Xu
- Institute of Tea Science, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou 310058, China.
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2
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Kalinke AH, Marcolino-Junior LH, Bergamini MF, Zarbin AJG. Platinum Nanoparticles Supported by Carbon Nanotubes: Improvement in electrochemical sensor performance for caffeine determination. AN ACAD BRAS CIENC 2024; 96:e20230067. [PMID: 38656055 DOI: 10.1590/0001-3765202420230067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/13/2023] [Indexed: 04/26/2024] Open
Abstract
Platinum nanoparticles supported by carbon nanotubes were obtained by a simple chemical route and used for preparation of electrochemical sensor towards caffeine determination. Carbon nanotubes were used before and after an acid treatment, yielding two different materials. Morphological and structural characterization of these materials showed platinum nanoparticles (size around 12 nm) distributed randomly along carbon nanotubes. Modified electrodes were directly prepared through a dispersion of these materials. Voltammetric studies in the presence of caffeine revealed an electrocatalytic effect of platinum oxides, electrochemically produced from the chemical oxidation of the platinum nanoparticles. This behavior was explored in the development a selective method for caffeine determination based on platinum oxide reduction at a lower potential value (+0.45 V vs. Ag/AgCl). Using the best set of experimental conditions, it was shown a linear relationship for the caffeine concentration ranging from 5.0 to 25 µmol L-1 with a sensitivity of 449 nA L µmol-1. Limits of detection and quantification of 0.54 and 1.80 µmol L-1 were calculated, respectively. Recovery values for real samples of caffeine pharmaceutical formulations between 98.6% and 101.0% (n = 3) were obtained using the proposed procedure. Statistical calculations showed good concordance (95% confidence level) between the added and recovery values.
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Affiliation(s)
- Adir H Kalinke
- Universidade Federal do Paraná, Grupo de Química de Materiais (GQM), Departamento de Química, Caixa Postal 19032, 81531-980 Curitiba, PR, Brazil
| | - Luiz H Marcolino-Junior
- Universidade Federal do Paraná, Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Caixa Postal 19032, 81531-980 Curitiba, PR, Brazil
| | - Marcio F Bergamini
- Universidade Federal do Paraná, Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Caixa Postal 19032, 81531-980 Curitiba, PR, Brazil
| | - Aldo J G Zarbin
- Universidade Federal do Paraná, Grupo de Química de Materiais (GQM), Departamento de Química, Caixa Postal 19032, 81531-980 Curitiba, PR, Brazil
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3
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Ebrahimi F, Xu H, Fuenmayor E, Major I. Tailoring drug release in bilayer tablets through droplet deposition modeling and injection molding. Int J Pharm 2024; 653:123859. [PMID: 38307401 DOI: 10.1016/j.ijpharm.2024.123859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/04/2024]
Abstract
This study explores the innovative production of personalized bilayer tablets, integrating two advanced manufacturing techniques: Droplet Deposition Modeling (DDM) and Injection Molding (IM). Unlike traditional methods limited to customizing dense bilayer medicines, our approach uses Additive Manufacturing (AM) to effectively adjust drug release profiles. Focusing on Caffeine and Paracetamol, we found successful processing for both DDM and IM using Caffeine formulation. The high viscosity of Paracetamol formulation posed challenges during DDM processing. Integrating Paracetamol formulation for the over-molding process proved effective, demonstrating IM's versatility in handling complex formulations. Varying infill percentages in DDM tablets led to distinct porosities affecting diverse drug release profiles in DDM-fabricated tablets. In contrast, tablets with high-density structures formed through the over-molding process displayed slower and more uniform release patterns. Combining DDM and IM techniques allows for overcoming the inherent limitations of each technique independently, enabling the production of bilayer tablets with customizable drug release profiles. The study's results offer promising insights into the future of personalized medicine, suggesting new pathways for the development of customized oral dosage forms.
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Affiliation(s)
- Farnoosh Ebrahimi
- PRISM Research Institute, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Han Xu
- PRISM Research Institute, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Evert Fuenmayor
- PRISM Research Institute, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Ian Major
- PRISM Research Institute, Technological University of the Shannon, N37 HD68 Athlone, Ireland.
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4
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Hareendran C, Alsirawan B, Paradkar A, Ajithkumar TG. In Situ Monitoring of Competitive Coformer Exchange Reaction by 1H MAS Solid-State NMR. Mol Pharm 2024; 21:1479-1489. [PMID: 38373877 DOI: 10.1021/acs.molpharmaceut.3c01118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
In a competitive coformer exchange reaction, a recent topic of interest in pharmaceutical research, the coformer in a pharmaceutical cocrystal is exchanged with another coformer that is expected to form a cocrystal that is more stable. There will be a competition between coformers to form the most stable product through the formation of hydrogen bonds. This will cause destabilization of the pharmaceutical products during processing or storage. Therefore, it is important to develop a mechanistic understanding of this transformation by monitoring each and every step of the reaction, employing a technique such as 1H nuclear magnetic resonance (NMR). In this study, an in situ monitoring of a coformer exchange reaction is carried out by 1H magic angle spinning (MAS) solid-state NMR (SSNMR) at a spinning frequency of 60 kHz. The changes in caffeine maleic acid cocrystals on addition of glutaric acid and caffeine glutaric cocrystals on addition of maleic acid were monitored. In all of the reactions, it has been observed that caffeine glutaric acid Form I is formed. When glutaric acid was added to 2:1 caffeine maleic acid, the formation of metastable 1:1 caffeine glutaric acid Form I was observed at the start of the experiment, indicating that the centrifugal pressure is enough for the formation. The difference in the end product of the reactions with a similar reaction pathway of 1:1 and 2:1 reactant stoichiometry indicates that a complete replacement of maleic acid has occurred only in the 1:1 stoichiometry of the reactants. The polymorphic transition of caffeine glutaric acid Form II to Form I at higher temperatures was a crucial reason that triggered the exchange of glutaric acid with maleic acid in the reaction of caffeine glutaric acid and maleic acid. Our results are novel since the new reaction pathways in competitive coformer exchange reactions enabled understanding the remarkable role of stoichiometry, polymorphism, temperature, and centrifugal pressure.
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Affiliation(s)
- Chaithanya Hareendran
- Central NMR Facility, and Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bashir Alsirawan
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Anant Paradkar
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - T G Ajithkumar
- Central NMR Facility, and Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Dos Santos ÉM, de Macedo LM, Ataide JA, Delafiori J, de Oliveira Guarnieri JP, Rosa PCP, Ruiz ALTG, Lancellotti M, Jozala AF, Catharino RR, Camargo GA, Paiva-Santos AC, Mazzola PG. Antioxidant, antimicrobial and healing properties of an extract from coffee pulp for the development of a phytocosmetic. Sci Rep 2024; 14:4453. [PMID: 38396007 PMCID: PMC10891086 DOI: 10.1038/s41598-024-54797-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
Consumer demand for natural, chemical-free products has grown. Food industry residues, like coffee pulp, rich in caffeine, chlorogenic acid and phenolic compounds, offer potential for pharmaceutical and cosmetic applications due to their antioxidant, anti-inflammatory, and antibacterial properties. Therefore, the objective of this work was to develop a phytocosmetic only with natural products containing coffee pulp extract as active pharmaceutical ingredient with antioxidant, antimicrobial and healing activity. Eight samples from Coffea arabica and Coffea canephora Pierre were analyzed for caffeine, chlorogenic acid, phenolic compounds, tannins, flavonoids, cytotoxicity, antibacterial activity, and healing potential. The Robusta IAC-extract had the greatest prominence with 192.92 μg/mL of chlorogenic acid, 58.98 ± 2.88 mg GAE/g sample in the FRAP test, 79.53 ± 5.61 mg GAE/g sample in the test of total phenolics, was not cytotoxic, and MIC 3 mg/mL against Staphylococcus aureus. This extract was incorporated into a stable formulation and preferred by 88% of volunteers. At last, a scratch assay exhibited the formulation promoted cell migration after 24 h, therefore, increased scratch retraction. In this way, it was possible to develop a phytocosmetic with the coffee pulp that showed desirable antioxidant, antimicrobial and healing properties.
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Affiliation(s)
- Érica Mendes Dos Santos
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Lucas Malvezzi de Macedo
- Faculdade de Ciências Médicas, Universidade de Campinas (UNICAMP), Rua Tessália Vieira de Camargo, 126, Campinas, São Paulo, 13083-887, Brazil
| | - Janaína Artem Ataide
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil.
| | - Jeany Delafiori
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - João Paulo de Oliveira Guarnieri
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Paulo César Pires Rosa
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Ana Lucia Tasca Gois Ruiz
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Marcelo Lancellotti
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Angela Faustino Jozala
- Laboratory of Industrial Microbiology and Fermentation Process (LAMINFE), University of Sorocaba, Sorocaba, São Paulo, 18023-000, Brazil
| | - Rodrigo Ramos Catharino
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
| | - Gisele Anne Camargo
- Institute of Food Technology, ITAL, Av. Brasil, 2880, Campinas, São Paulo, 13070-178, Brazil
| | - Ana Cláudia Paiva-Santos
- Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
- REQUIMTE/LAQV, Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - Priscila Gava Mazzola
- Faculdade de Ciências Farmacêuticas, Universidade de Campinas (UNICAMP), Rua Cândido Portinari, 200, Campinas, São Paulo, 13083-871, Brazil
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Li Z, Li Z, Ma H, Fu S, Liu G, Hao C, Liu Y. Molecular insight into binding behavior of caffeine with lactoferrin: Spectroscopic, molecular docking, and simulation study. J Dairy Sci 2023; 106:8249-8261. [PMID: 37641325 DOI: 10.3168/jds.2023-23631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/29/2023] [Indexed: 08/31/2023]
Abstract
The majority of bioactive substances in the human diet come from polyphenols. Here, we use spectroscopy, molecular docking, molecular dynamics simulations, and in vitro digestion to look at the relationship between caffeine (CAF) and bovine lactoferrin (BLF). The correlation analysis of the CAF-BLF fluorescence quenching process revealed that the reaction was spontaneous and that the CAF-BLF fluorescence quenching process may have been static. The predominant intrinsic binding forces were hydrogen bonds and van der Waals forces, which were also supported by molecular docking and molecular dynamics simulations. Through Fourier infrared and circular dichroism spectroscopy experiments, it was found that CAF changed the secondary structure of BLF and might bind to the hydrophobic amino acids of BLF. Compared with BLF, CAF-BLF showed inhibitory effects on digestion in simulated in vitro digestion. It will be helpful to better understand the interaction between CAF and BLF and provide the basis for the development of innovative dairy products.
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Affiliation(s)
- Zekun Li
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Zhixi Li
- College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Haorui Ma
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Shangchen Fu
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Guanxu Liu
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Changchun Hao
- College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, China.
| | - Yongfeng Liu
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, Shaanxi, China.
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7
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Song X, Kirtipal N, Lee S, Malý P, Bharadwaj S. Current therapeutic targets and multifaceted physiological impacts of caffeine. Phytother Res 2023; 37:5558-5598. [PMID: 37679309 DOI: 10.1002/ptr.8000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/04/2023] [Accepted: 08/17/2023] [Indexed: 09/09/2023]
Abstract
Caffeine, which shares consubstantial structural similarity with purine adenosine, has been demonstrated as a nonselective adenosine receptor antagonist for eliciting most of the biological functions at physiologically relevant dosages. Accumulating evidence supports caffeine's beneficial effects against different disorders, such as total cardiovascular diseases and type 2 diabetes. Conversely, paradoxical effects are also linked to caffeine ingestion in humans including hypertension-hypotension and tachycardia-bradycardia. These observations suggest the association of caffeine action with its ingested concentration and/or concurrent interaction with preferential molecular targets to direct explicit events in the human body. Thus, a coherent analysis of the functional targets of caffeine, relevant to normal physiology, and disease pathophysiology, is required to understand the pharmacology of caffeine. This review provides a broad overview of the experimentally validated targets of caffeine, particularly those of therapeutic interest, and the impacts of caffeine on organ-specific physiology and pathophysiology. Overall, the available empirical and epidemiological evidence supports the dose-dependent functional activities of caffeine and advocates for further studies to get insights into the caffeine-induced changes under specific conditions, such as asthma, DNA repair, and cancer, in view of its therapeutic applications.
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Affiliation(s)
- Xinjie Song
- Zhejiang Provincial Key Lab for Chemical and Biological Processing Technology of Farm Product, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, China
| | - Nikhil Kirtipal
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Sunjae Lee
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Petr Malý
- Laboratory of Ligand Engineering, Institute of Biotechnology of the Czech Academy of Sciences v.v.i, BIOCEV Research Center, Vestec, Czech Republic
| | - Shiv Bharadwaj
- Laboratory of Ligand Engineering, Institute of Biotechnology of the Czech Academy of Sciences v.v.i, BIOCEV Research Center, Vestec, Czech Republic
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8
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Shen Y, Xiao Y, Edkins RM, Youngs TGA, Hughes TL, Tellam J, Edkins K. Elucidating the hydrotropism behaviour of aqueous caffeine and sodium benzoate solution through NMR and neutron total scattering analysis. Int J Pharm 2023; 647:123520. [PMID: 37858637 DOI: 10.1016/j.ijpharm.2023.123520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
Hydrotropism is a convenient way to increase the solubility of drugs by up to several orders of magnitude, and even though it has been researched for decades with both experimental and simulation methods, its mechanism is still unknown. Here, we use caffeine/sodium benzoate (CAF-SB) as model system to explore the behaviour of caffeine solubility enhancement in water through NMR spectroscopy and neutron total scattering. 1H NMR shows strong interaction between caffeine and sodium benzoate in water. Neutron total scattering combined with empirical potential structure refinement, a systematic method to study the solution structure, reveals π-stacking between caffeine and the benzoate anion as well as Coulombic interactions with the sodium cation. The strongest hydrogen bond interaction in the system is between benzoate and water, which help dissolve CAF-SB complex and increase the solubility of CAF in water. Besides, the stronger interaction between CAF and water and the distortion of water structure are further mechanisms of the CAF solubility enhancement. It is likely that the variety of mechanisms for hydrotropism shown in this system can be found for other hydrotropes, and NMR spectroscopy and neutron total scattering can be used as complementary techniques to generate a holistic picture of hydrotropic solutions.
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Affiliation(s)
- Yichun Shen
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - Yitian Xiao
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - Robert M Edkins
- Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295, Cathedral Street, Glasgow, G1 1XL, UK
| | - Tristan G A Youngs
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - Terri-Louise Hughes
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - James Tellam
- ISIS Deuteration Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - Katharina Edkins
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK.
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Guo C, Shen W, Jin W, Jia X, Ji Z, Li J, Li B. Aggregation kinetics of green tea nanoparticles: Effects of pH, metal ions, and temperature. J Food Sci 2023; 88:4068-4078. [PMID: 37623917 DOI: 10.1111/1750-3841.16750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023]
Abstract
Colloidal nanoparticles in tea infusion are the link connecting micromolecular mechanism and macro-aggregation process of tea cream formation. In order to elucidate, the kinetics mechanism of green tea nanoparticles (gTNPs) aggregation, zeta-potentials, total average aggregation (TAA) rates, and critical coagulation concentration (CCC) in the presence of various pH and metal ions were investigated. Additionally, the effect of temperature on gTNPs aggregation was further explored. The results revealed that the TAA rate of gTNPs increased with decreasing pH values, the CCC of gTNPs increased in the order Mg2+ ≈ Ca2+ < Na+ ≈ K+ . The reason was that different positive ions changed the surface electric field strength of gTNPs to a different extent. Furthermore, it was indicated that low temperature could promote gTNPs aggregation in indirect way. Low temperature promoted the binding of epigallocatechin gallate (EGCG) and caffeine, and the combination between gTNPs and EGCG-caffeine complexes weakened the stability of gTNPs resulting from reduction in electrostatic repulsion. PRACTICAL APPLICATION: Tea is a popular beverage all over the world. This research revealed the mechanism of green tea nanoparticles aggregation and laid a theoretical foundation for the regulation of tea cream formation in tea beverage.
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Affiliation(s)
- Cheng Guo
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Wangyang Shen
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Weiping Jin
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Xiwu Jia
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Zhili Ji
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Jinling Li
- College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, Wuhan, China
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, China
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10
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Sevrioukova IF. Interaction of CYP3A4 with caffeine: First insights into multiple substrate binding. J Biol Chem 2023; 299:105117. [PMID: 37524132 PMCID: PMC10470200 DOI: 10.1016/j.jbc.2023.105117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/18/2023] [Accepted: 07/27/2023] [Indexed: 08/02/2023] Open
Abstract
Human cytochrome P450 3A4 (CYP3A4) is a major drug-metabolizing enzyme that shows extreme substrate promiscuity. Moreover, its large and malleable active site can simultaneously accommodate several substrate molecules of the same or different nature, which may lead to cooperative binding and allosteric behavior. Due to difficulty of crystallization of CYP3A4-substrate complexes, it remains unknown how multiple substrates can arrange in the active site. We determined crystal structures of CYP3A4 bound to three and six molecules of caffeine, a psychoactive alkaloid serving as a substrate and modulator of CYP3A4. In the ternary complex, one caffeine binds to the active site suitably for C8-hydroxylation, most preferable for CYP3A4. In the senary complex, three caffeine molecules stack parallel to the heme with the proximal ligand poised for 3-N-demethylation. However, the caffeine stack forms extensive hydrophobic interactions that could preclude product dissociation and multiple turnovers. In both complexes, caffeine is also bound in the substrate channel and on the outer surface known as a peripheral site. At all sites, aromatic stacking with the caffeine ring(s) is likely a dominant interaction, while direct and water-mediated polar contacts provide additional stabilization for the substrate-bound complexes. Protein-ligand interactions via the active site R212, intrachannel T224, and peripheral F219 were experimentally confirmed, and the latter two residues were identified as important for caffeine association. Collectively, the structural, spectral, and mutagenesis data provide valuable insights on the ligand binding mechanism and help better understand how purine-based pharmaceuticals and other aromatic compounds could interact with CYP3A4 and mediate drug-drug interactions.
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Affiliation(s)
- Irina F Sevrioukova
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California, USA.
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11
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Matsumura N, Aoyama K. Glutathione-Mediated Neuroprotective Effect of Purine Derivatives. Int J Mol Sci 2023; 24:13067. [PMID: 37685879 PMCID: PMC10487553 DOI: 10.3390/ijms241713067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/19/2023] [Accepted: 08/20/2023] [Indexed: 09/10/2023] Open
Abstract
Numerous basic studies have reported on the neuroprotective properties of several purine derivatives such as caffeine and uric acid (UA). Epidemiological studies have also shown the inverse association of appropriate caffeine intake or serum urate levels with neurodegenerative diseases such as Alzheimer disease (AD) and Parkinson's disease (PD). The well-established neuroprotective mechanisms of caffeine and UA involve adenosine A2A receptor antagonism and antioxidant activity, respectively. Our recent study found that another purine derivative, paraxanthine, has neuroprotective effects similar to those of caffeine and UA. These purine derivatives can promote neuronal cysteine uptake through excitatory amino acid carrier protein 1 (EAAC1) to increase neuronal glutathione (GSH) levels in the brain. This review summarizes the GSH-mediated neuroprotective effects of purine derivatives. Considering the fact that GSH depletion is a manifestation in the brains of AD and PD patients, administration of purine derivatives may be a new therapeutic approach to prevent or delay the onset of these neurodegenerative diseases.
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Affiliation(s)
- Nobuko Matsumura
- Department of Pharmacology, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi, Tokyo 173-8605, Japan
| | - Koji Aoyama
- Department of Pharmacology, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi, Tokyo 173-8605, Japan
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12
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Abstract
The classical DNA aptamer for adenosine and ATP was selected twice using ATP as the target in 1995 and 2005, respectively. In 2022, this motif appeared four more times from selections using adenosine, ATP, theophylline, and caffeine as targets, suggesting that this aptamer can also bind methylxanthines. In this work, using thioflavin T fluorescence spectroscopy, this classical DNA aptamer showed Kd values for adenosine, theophylline, and caffeine of 9.5, 101, and 131 μM, respectively, and similar Kd values were obtained using isothermal titration calorimetry. Binding to the methylxanthines was also observed for the newly selected Ade1301 aptamer but not for the Ade1304 aptamer. The RNA aptamer for ATP also had no binding to the methylxanthines. Molecular dynamics simulations were performed using the classical DNA and RNA aptamers based on their NMR structures, and the simulation results were consistent with the experimental observations, explaining the selectivity profiles. This study suggests that a broader range of target analogues need to be tested for aptamers. For the detection of adenosine and ATP, the Ade1304 aptamer is a better choice due to its better selectivity.
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Affiliation(s)
- Yuzhe Ding
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Yachen Xie
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Albert Zehan Li
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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13
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Krueger L, Cao Y, Zheng Z, Ward J, Miles JA, Popat A. 3D printing tablets for high-precision dose titration of caffeine. Int J Pharm 2023; 642:123132. [PMID: 37315638 DOI: 10.1016/j.ijpharm.2023.123132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/16/2023]
Abstract
Through 3D printing (3DP), many parameters of solid oral dosage forms can be customised, allowing for truly personalised medicine in a way that traditional pharmaceutical manufacturing would struggle to achieve. One of the many options for customisation involves dose titration, allowing for gradual weaning of a medication at dose intervals smaller than what is available commercially. In this study we demonstrate the high accuracy and precision of 3DP dose titration of caffeine, selected due to its global prevalence as a behavioural drug and well-known titration-dependent adverse reactions in humans. This was achieved using a simple filament base of polyvinyl alcohol, glycerol, and starch, utilising hot melt extrusion coupled with fused deposition modelling 3DP. Tablets containing 25 mg, 50 mg, and 100 mg doses of caffeine were successfully printed with drug content in the accepted range prescribed for conventional tablets (90 - 110%), and excellent precision whereby the weights of all doses showed a relative standard deviation of no more than 3%. Importantly, these results proved 3D printed tablets to be far superior to splitting a commercially available caffeine tablet. Additional assessment of filament and tablet samples were reviewed by differential scanning calorimetry, thermogravimetric analysis, HPLC, and scanning electron microscopy, showing no evidence of degradation of caffeine or the raw materials, with smooth and consistent filament extrusion. Upon dissolution, all tablets achieved greater than 70% release between 50 and 60 min, showing a predictable rapid release profile regardless of dose. The outcomes of this study highlight the benefits that dose titration with 3DP can offer, especially to more commonly prescribed medications that can have even more harmful withdrawal-induced adverse reactions.
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Affiliation(s)
- Liam Krueger
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Yuxue Cao
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Zheng Zheng
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Jason Ward
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Jared A Miles
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia.
| | - Amirali Popat
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia.
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14
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Inoue M, Osada T, Hisada H, Koide T, Fukami T, Roy A, Carriere J. Quantitative Monitoring of Cocrystal Polymorphisms in Model Tablets Using Transmission Low-Frequency Raman Spectroscopy. J Pharm Sci 2023; 112:225-229. [PMID: 36126759 DOI: 10.1016/j.xphs.2022.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 11/19/2022]
Abstract
Cocrystallization is a technique for improving the physical properties of active pharmaceutical ingredients. However, cocrystals can transform into more stable polymorphs as well as dissociate to original materials. Therefore, an analytical technique is required to determine the polymorphic transformation quickly and accurately in tablets. The purpose of this study is to develop a method to monitor cocrystal polymorphs in model tablets using transmission low-frequency Raman spectroscopy. The tablets, consisting of only metastable polymorphs of caffeine-glutaric acid cocrystals, were stored under various relative humidity levels. The composition of the cocrystal polymorphs were calculated from a calibration curve relating the actual composition to the predicted values calculated by partial least squares regression processing of low-frequency Raman spectra. The metastable form gradually converted to a stable form, and polymorphic phase transformation occurred with increasing relative humidity. Ninety-six percent of the metastable form converted into a stable form stored at 25 °C after 3 h at 95% RH. In conclusion, transmission low-frequency Raman spectroscopy can be used to quantitatively monitor cocrystal polymorphs. This technique is one of the candidate techniques to quantifiably evaluate the physico-chemical stability of cocrystal polymorphs in tablets.
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Affiliation(s)
- Motoki Inoue
- Department of Molecular Pharmaceutics, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan.
| | - Takumi Osada
- Department of Molecular Pharmaceutics, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Hiroshi Hisada
- Department of Molecular Pharmaceutics, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Tatsuo Koide
- National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Toshiro Fukami
- Department of Molecular Pharmaceutics, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Anjan Roy
- Coherent Inc., 850 East, Duarte Road, Monrovia, California 91016, United States
| | - James Carriere
- Coherent Inc., 850 East, Duarte Road, Monrovia, California 91016, United States
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15
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Silva RMS, Santos AM, Wong A, Fatibello-Filho O, Moraes FC, Farias MAS. Determination of ofloxacin in the presence of dopamine, paracetamol, and caffeine using a glassy carbon electrode based on carbon nanomaterials and gold nanoparticles. Anal Methods 2022; 14:3859-3866. [PMID: 36129055 DOI: 10.1039/d2ay01177h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A new electrode was prepared based on functionalized graphene and gold nanoparticles dispersed in a chitosan film. Such an electrochemical sensor determines ofloxacin in the presence of dopamine, paracetamol, and caffeine. Characterization (morphological and electrochemical) was done using scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltammetry. The sensor design improved the analytical signal, the electrochemical activity, and the electron transfer rate. Ofloxacin was determined by square-wave voltammetry, with a linear concentration range of 0.10-4.9 μmol L-1 (r = 0.999, LOD = 12 nmol L-1). The proposed sensor showed good repeatability and selectivity and was applied successfully to the determination of ofloxacin in pharmaceutical formulations, synthetic urine, and water river samples. The proposed method proved to be excellent; therefore, it is an alternative method for the determination of ofloxacin.
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Affiliation(s)
- Rebeca M S Silva
- Department of Chemistry, Federal University of Amazonas, 69080-900, Manaus, AM, Brazil
| | - Anderson M Santos
- Department of Chemistry, Federal University of São Carlos, 13560-970, São Carlos, SP, Brazil
| | - Ademar Wong
- Department of Chemistry, Federal University of São Carlos, 13560-970, São Carlos, SP, Brazil
| | - Orlando Fatibello-Filho
- Department of Chemistry, Federal University of São Carlos, 13560-970, São Carlos, SP, Brazil
| | - Fernando C Moraes
- Department of Chemistry, Federal University of São Carlos, 13560-970, São Carlos, SP, Brazil
| | - Marco A S Farias
- Department of Agroindustrial Technology and Rural Socioeconomics, Federal University of São Carlos, 13600-970, Araras, SP, Brazil.
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16
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Tran BT, Tran TN, Tran AMT, Nguyen GCD, Nguyen QTT. Simultaneous Determination of Paracetamol, Ibuprofen, and Caffeine in Tablets by Molecular Absorption Spectroscopy Combined with Classical Least Square Method. Molecules 2022; 27:2657. [PMID: 35566008 PMCID: PMC9103904 DOI: 10.3390/molecules27092657] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 11/28/2022] Open
Abstract
In this paper, the classical least-squares (CLS) method with molecular absorption spectrophotometric measurement was used to determine simultaneously paracetamol (PAR), ibuprofen (IBU), and caffeine (CAF) in tablets. The absorbance spectra of the standard solutions and samples were measured over a wavelength from 220 to 300 nm with a 0.5 nm step. The concentration of PAR, IBU, and CAF in the sample solutions was calculated by using Visual Basic for Applications (VBA) and a program called CLS-Excel written in Microsoft Excel 2016. The method and the CLS-Excel program were tested on mixed standard laboratory samples with different PAR, IBU, and CAF concentration ratios, and they showed only small errors and a satisfying repeatability. An analytical procedure for tablets containing PAR, IBU, and CAF was developed. The reliability of the procedure was proved via the recovery and repeatability of the analysis results with an actual tablet sample and by comparing the mean contents of active substances in the tablets obtained from the analytical procedure with the HPLC method. The procedure is simple with a reduced cost compared with the HPLC standard method.
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Affiliation(s)
- Binh Thuc Tran
- Chemistry Department, University of Sciences, Hue University, Hue 530000, Vietnam; (T.N.T.); (A.M.T.T.); (G.C.D.N.)
| | - Tuyen Ngoc Tran
- Chemistry Department, University of Sciences, Hue University, Hue 530000, Vietnam; (T.N.T.); (A.M.T.T.); (G.C.D.N.)
| | - Ai My Thi Tran
- Chemistry Department, University of Sciences, Hue University, Hue 530000, Vietnam; (T.N.T.); (A.M.T.T.); (G.C.D.N.)
| | - Giang Chau Dang Nguyen
- Chemistry Department, University of Sciences, Hue University, Hue 530000, Vietnam; (T.N.T.); (A.M.T.T.); (G.C.D.N.)
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17
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Mussa ZH, Al-Qaim FF, Alqaim ZH, Latip J. Electrochemical Oxidation of Different Therapeutic Classes of Pharmaceuticals Using Graphite-PVC Composite Electrode. Acta Chim Slov 2021; 68:811-820. [PMID: 34918774 DOI: 10.17344/acsi.2021.6784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 08/13/2021] [Accepted: 10/21/2021] [Indexed: 11/19/2022] Open
Abstract
This study reports electrochemical treatment of different therapeutic classes of pharmaceuticals (caffeine, prazosin, enalapril, carbamazepine, nifedipine, levonorgestrel, and simvastatin) in a mixture. The electrochemical process was investigated using graphite-PVC anode at different applied voltages (3, 5, and 12 V), initial concentrations of studied pharmaceuticals in aqueous solution (5 and 10 mg/L), and concentrations of sodium chloride (1 and 2 g/L). The % removal of pharmaceuticals increased with the applied voltage, and was found higher than 98% after 50 min of electrolysis at 5 V. Energy consumption ranged between 0.760 and 3.300 Wh/mg using 12 V being the highest value compared to 3 and 5 V. The formation of chlorinated by-products from four selected pharmaceuticals, simvastatin (C11H13Cl3O5, and C10H12Cl4O3), prazosin (C13H12Cl3N5O3 and C10H11Cl4N2O2), carbamazepine and caffeine (C15H11N2O2Cl and C8H9N4O2Cl) was identified and elucidated using liquid chromatography-time of flight mass spectrometry (LC-TOF/MS).
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Affiliation(s)
- Zainab H Mussa
- 1- Faculty of Pharmacy, University of Al-Ameed, Karbala, Iraq.
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18
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Enderle AG, Bosso M, Groß R, Heiland M, Bollini M, Culzoni MJ, Kirchhoff F, Münch J, Streb C. Increased in vitro Anti-HIV Activity of Caffeinium-Functionalized Polyoxometalates. ChemMedChem 2021; 16:2727-2730. [PMID: 33908695 PMCID: PMC8518980 DOI: 10.1002/cmdc.202100281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Indexed: 11/10/2022]
Abstract
Polyoxometalates (POMs), molecular metal oxide anions, are inorganic clusters with promising antiviral activity. Herein we report increased anti-HIV-1 activity of a POM when electrostatically combined with organic counter-cations. To this end, Keggin-type cerium tungstate POMs have been combined with organic methyl-caffeinium (Caf) cations, and their cytotoxicity, antiviral activity and mode of action have been studied. The novel compound, Caf4 K[β2 -CeSiW11 O39 ]×H2 O, exhibits sub-nanomolar antiviral activity and inhibits HIV-1 infectivity by acting on an early step of the viral infection cycle. This work demonstrates that combination of POM anions and organic bioactive cations can be a powerful new strategy to increase antiviral activity of these inorganic compounds.
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Affiliation(s)
- Ana G. Enderle
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
- Medicinal Chemistry LabCentro de Investigaciones en Bionanociencias (CIBION), CONICETGodoy Cruz, 2390C1425FQDCiudad de Buenos AiresArgentina
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ)Universidad Nacional del Litoral – CONICETCiudad UniversitariaParaje El Pozo, CC242S3000Santa FeArgentina
| | - Matteo Bosso
- Institute of Molecular VirologyUlm University Medical CenterMeyerhofstraße 189081UlmGermany
| | - Rüdiger Groß
- Institute of Molecular VirologyUlm University Medical CenterMeyerhofstraße 189081UlmGermany
| | - Magdalena Heiland
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Mariela Bollini
- Medicinal Chemistry LabCentro de Investigaciones en Bionanociencias (CIBION), CONICETGodoy Cruz, 2390C1425FQDCiudad de Buenos AiresArgentina
| | - María J. Culzoni
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ)Universidad Nacional del Litoral – CONICETCiudad UniversitariaParaje El Pozo, CC242S3000Santa FeArgentina
| | - Frank Kirchhoff
- Institute of Molecular VirologyUlm University Medical CenterMeyerhofstraße 189081UlmGermany
| | - Jan Münch
- Institute of Molecular VirologyUlm University Medical CenterMeyerhofstraße 189081UlmGermany
| | - Carsten Streb
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
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19
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Chirasani VR, Pasek DA, Meissner G. Structural and functional interactions between the Ca 2+-, ATP-, and caffeine-binding sites of skeletal muscle ryanodine receptor (RyR1). J Biol Chem 2021; 297:101040. [PMID: 34352272 PMCID: PMC8408527 DOI: 10.1016/j.jbc.2021.101040] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 07/28/2021] [Accepted: 07/30/2021] [Indexed: 11/22/2022] Open
Abstract
Ryanodine receptor type 1 (RyR1) releases Ca2+ ions from the sarcoplasmic reticulum of skeletal muscle cells to initiate muscle contraction. Multiple endogenous and exogenous effectors regulate RyR1, such as ATP, Ca2+, caffeine (Caf), and ryanodine. Cryo-EM identified binding sites for the three coactivators Ca2+, ATP, and Caf. However, the mechanism of coregulation and synergy between these activators remains to be determined. Here, we used [3H]ryanodine ligand-binding assays and molecular dynamics simulations to test the hypothesis that both the ATP- and Caf-binding sites communicate with the Ca2+-binding site to sensitize RyR1 to Ca2+. We report that either phosphomethylphosphonic acid adenylate ester (AMPPCP), a nonhydrolyzable ATP analog, or Caf can activate RyR1 in the absence or the presence of Ca2+. However, enhanced RyR1 activation occurred in the presence of Ca2+, AMPPCP, and Caf. In the absence of Ca2+, Na+ inhibited [3H]ryanodine binding without impairing RyR1 activation by AMPPCP and Caf. Computational analysis suggested that Ca2+-, ATP-, and Caf-binding sites modulate RyR1 protein stability through interactions with the carboxyterminal domain and other domains in the activation core. In the presence of ATP and Caf but the absence of Ca2+, Na+ is predicted to inhibit RyR1 by interacting with the Ca2+-binding site. Our data suggested that ATP and Caf binding affected the conformation of the Ca2+-binding site, and conversely, Ca2+ binding affected the conformation of the ATP- and Caf-binding sites. We conclude that Ca2+, ATP, and Caf regulate RyR1 through a network of allosteric interactions involving the Ca2+-, ATP-, and Caf-binding sites.
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Affiliation(s)
- Venkat R Chirasani
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina, USA.
| | - Daniel A Pasek
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Gerhard Meissner
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina, USA
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20
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Grabska J, Beć KB, Ozaki Y, Huck CW. Anharmonic DFT Study of Near-Infrared Spectra of Caffeine: Vibrational Analysis of the Second Overtones and Ternary Combinations. Molecules 2021; 26:molecules26175212. [PMID: 34500645 PMCID: PMC8433751 DOI: 10.3390/molecules26175212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022] Open
Abstract
Anharmonic quantum chemical calculations were employed to simulate and interpret a near-infrared (NIR) spectrum of caffeine. First and second overtones, as well as binary and ternary combination bands, were obtained, accurately reproducing the lineshape of the experimental spectrum in the region of 10,000–4000 cm−1 (1000–2500 nm). The calculations enabled performing a detailed analysis of NIR spectra of caffeine, including weak bands due to the second overtones and ternary combinations. A highly convoluted nature of NIR spectrum of caffeine was unveiled, with numerous overlapping bands found beneath the observed spectral lineshape. To properly reflect that intrinsic complexity, the band assignments were provided in the form of heat maps presenting the contributions to the NIR spectrum from various kinds of vibrational transitions. These contributions were also quantitatively assessed in terms of the integral intensities. It was found that the combination bands provide the decisively dominant contributions to the NIR spectrum of caffeine. The first overtones gain significant importance between 6500–5500 cm−1, while the second overtones are meaningful in the higher wavenumber regions, particularly in the 10,000–7000 cm−1 region. The obtained detailed band assignments enabled deep interpretation of the absorption regions of caffeine identified in the literature as meaningful for analytical applications of NIR spectroscopy focused on quantitative analysis of caffeine content in drugs and natural products.
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Affiliation(s)
- Justyna Grabska
- CCB—Center for Chemistry and Biomedicine, Institute of Analytical Chemistry and Radiochemistry, Leopold-Franzens University, Innrain 80/82, 6020 Innsbruck, Austria; (K.B.B.); (C.W.H.)
- Correspondence:
| | - Krzysztof B. Beć
- CCB—Center for Chemistry and Biomedicine, Institute of Analytical Chemistry and Radiochemistry, Leopold-Franzens University, Innrain 80/82, 6020 Innsbruck, Austria; (K.B.B.); (C.W.H.)
| | - Yukihiro Ozaki
- School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda 669-1337, Hyogo, Japan;
- Toyota Physical and Chemical Research Institute, Yokomichi, Nagakute 480-1192, Aichi, Japan
| | - Christian W. Huck
- CCB—Center for Chemistry and Biomedicine, Institute of Analytical Chemistry and Radiochemistry, Leopold-Franzens University, Innrain 80/82, 6020 Innsbruck, Austria; (K.B.B.); (C.W.H.)
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21
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Sobolev AP, Di Lorenzo A, Circi S, Santarcangelo C, Ingallina C, Daglia M, Mannina L. NMR, RP-HPLC-PDA-ESI-MS n, and RP-HPLC-FD Characterization of Green and Oolong Teas ( Camellia sinensis L.). Molecules 2021; 26:molecules26175125. [PMID: 34500554 PMCID: PMC8434197 DOI: 10.3390/molecules26175125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022] Open
Abstract
Untargeted (NMR) and targeted (RP-HPLC-PDA-ESI-MSn, RP-HPLC-FD) analytical methodologies were used to determine the bioactive components of 19 tea samples, characterized by different production processes (common tea and GABA tea), degrees of fermentation (green and oolong teas), and harvesting season (autumn and spring). The combination of NMR data and a multivariate statistical approach led to a statistical model able to discriminate between GABA and non-GABA teas and green and oolong teas. Targeted analyses showed that green and GABA green teas had similar polyphenol and caffeine contents, but the GABA level was higher in GABA green teas than in regular green tea samples. GABA oolong teas showed lower contents of polyphenols, caffeine, and amino acids, and a higher content of GABA, in comparison with non-GABA oolong teas. In conclusion, the results of this study suggest that the healthy properties of teas, especially GABA teas, have to be evaluated via comprehensive metabolic profiling rather than only the GABA content.
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Affiliation(s)
- Anatoly P. Sobolev
- Institute for Biological Systems, Magnetic Resonance Laboratory “Segre-Capitani”, CNR, Via Salaria Km 29.300, 00015 Monterotondo, Italy;
| | - Arianna Di Lorenzo
- Dipartimento di Scienze del Farmaco, Università degli Studi di Pavia, Viale Taramelli 12, 27100 Pavia, Italy;
| | - Simone Circi
- Department of Chemistry and Technologies of Drugs, Laboratory of Food Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy; (S.C.); (L.M.)
| | | | - Cinzia Ingallina
- Department of Chemistry and Technologies of Drugs, Laboratory of Food Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy; (S.C.); (L.M.)
- Correspondence: (C.I.); (M.D.)
| | - Maria Daglia
- Department of Pharmacy, University of Naples Federico II, 80138 Naples, Italy;
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China
- Correspondence: (C.I.); (M.D.)
| | - Luisa Mannina
- Department of Chemistry and Technologies of Drugs, Laboratory of Food Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy; (S.C.); (L.M.)
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22
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Piechocka J, Gramza-Michałowska A, Szymandera-Buszka K. The Changes in Antioxidant Activity of Selected Flavonoids and Caffeine Depending on the Dosage and Form of Thiamine. Molecules 2021; 26:molecules26154702. [PMID: 34361853 PMCID: PMC8347205 DOI: 10.3390/molecules26154702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/24/2021] [Accepted: 07/28/2021] [Indexed: 11/16/2022] Open
Abstract
Phenolic compounds and thiamine may serve as therapies against oxidative stress-related neurodegenerative diseases. However, it is important to note that these components show high instability under changing conditions. The study’s aim was to determine the impact of the thiamine concentration (hydrochloride—TH and pyrophosphate—TP; in the range 0.02 to 20 mg/100 g on the indices of the chelating properties and reducing power, and free radicals scavenging indices of EGCG, EGC, ECG and caffeine added from 0.04 to 6.0 mg/100 g. Our research confirmed that higher concentrations of TH and TP can exhibit significant activity against the test antioxidant indices of all components. When above 5.0 mg/100 g of thiamine was used, the radical scavenging abilities of the compound decreased in the following order: EGCG > ECG > EGC > caffeine. The highest correlation was found for the concentration of thiamine pyrophosphate to 20.0 mg/100 g and EGCG. Knowledge of the impact of factors associated with the concentration of both EGCG, EGC, ECG or caffeine and thiamine on their activity could carry weight in regulating the quality supplemented foods, especially of nutrition support for people of all ages were oral, enteral tube feeding and parenteral nutrition).
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Quintero-Jaramillo JA, Carrero-Mantilla JI, Sanabria-González NR. A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents. ScientificWorldJournal 2021; 2021:9998924. [PMID: 34335116 PMCID: PMC8315881 DOI: 10.1155/2021/9998924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/26/2021] [Accepted: 06/30/2021] [Indexed: 12/03/2022] Open
Abstract
A systematic literature review of publications from 2000 to 2020 was carried out to identify research trends on adsorbent materials for the removal of caffeine from aqueous solutions. Publications were retrieved from three databases (Scopus, Web of Science, and Google Scholar). Words "adsorption AND caffeine" were examined into titles, abstracts, and keywords. A brief bibliometric analysis was performed with emphasis on the type of publication and of most cited articles. Materials for the removal of caffeine were classified according to the type of material into three main groups: organic, inorganic, and composites, each of them subdivided into different subgroups consistent with their origin or production. Tables resume for each subgroup of adsorbents the key information: specific surface area, dose, pH, maximum adsorption capacity, and isotherm models for the removal of caffeine. The highest adsorption capacities were achieved by organic adsorbents, specifically those with granular activated carbon (1961.3 mg/g) and grape stalk activated carbon (916.7 mg/g). Phenyl-phosphate-based porous organic polymer (301 mg/g), natural sandy loam sediment (221.2 mg/g), composites of MCM-48 encapsulated graphene oxide (153.8 mg/g), and organically modified clay (143.7 mg/g) showed adsorption capacities lower than those of activated carbons. In some activated carbons, a relation between the specific surface area (SSA) and the maximum adsorption capacity (Q max) was found.
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Affiliation(s)
- Javier Andrés Quintero-Jaramillo
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Javier Ignacio Carrero-Mantilla
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Nancy Rocío Sanabria-González
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
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Woziwodzka A, Krychowiak-Maśnicka M, Gołuński G, Felberg A, Borowik A, Wyrzykowski D, Piosik J. Modulatory Effects of Caffeine and Pentoxifylline on Aromatic Antibiotics: A Role for Hetero-Complex Formation. Molecules 2021; 26:molecules26123628. [PMID: 34198510 PMCID: PMC8231999 DOI: 10.3390/molecules26123628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 01/15/2023] Open
Abstract
Antimicrobial resistance is a major healthcare threat globally. Xanthines, including caffeine and pentoxifylline, are attractive candidates for drug repurposing, given their well-established safety and pharmacological profiles. This study aimed to analyze potential interactions between xanthines and aromatic antibiotics (i.e., tetracycline and ciprofloxacin), and their impact on antibiotic antibacterial activity. UV-vis spectroscopy, statistical-thermodynamical modeling, and isothermal titration calorimetry were used to quantitatively evaluate xanthine-antibiotic interactions. The antibacterial profiles of xanthines, and xanthine-antibiotic mixtures, towards important human pathogens Staphylococcus aureus, Enterococcus faecium, Escherichia coli, Acinetobacter baumannii, Klebsiella pneumoniae, and Enterobacter cloacae were examined. Caffeine and pentoxifylline directly interact with ciprofloxacin and tetracycline, with neighborhood association constant values of 15.8-45.6 M-1 and enthalpy change values up to -4 kJ·M-1. Caffeine, used in mixtures with tested antibiotics, enhanced their antibacterial activity in most pathogens tested. However, antagonistic effects of caffeine were also observed, but only with ciprofloxacin toward Gram-positive pathogens. Xanthines interact with aromatic antibiotics at the molecular and in vitro antibacterial activity level. Given considerable exposure to caffeine and pentoxifylline, these interactions might be relevant for the effectiveness of antibacterial pharmacotherapy, and may help to identify optimal treatment regimens in the era of multidrug resistance.
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Affiliation(s)
- Anna Woziwodzka
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland; (G.G.); (A.F.); (A.B.); (J.P.)
- Correspondence:
| | - Marta Krychowiak-Maśnicka
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland;
| | - Grzegorz Gołuński
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland; (G.G.); (A.F.); (A.B.); (J.P.)
| | - Anna Felberg
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland; (G.G.); (A.F.); (A.B.); (J.P.)
| | - Agnieszka Borowik
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland; (G.G.); (A.F.); (A.B.); (J.P.)
| | - Dariusz Wyrzykowski
- Department of Inorganic Biological Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
| | - Jacek Piosik
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland; (G.G.); (A.F.); (A.B.); (J.P.)
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Oliveira J, Azevedo J, Teixeira N, Araújo P, de Freitas V, Basílio N, Pina F. On the Limits of Anthocyanins Co-Pigmentation Models and Respective Equations. J Agric Food Chem 2021; 69:1359-1367. [PMID: 33470110 DOI: 10.1021/acs.jafc.0c05954] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Anthocyanins co-pigmentation models with application on 1:1 complexes were revisited, and their limitations were critically commented. The flavylium multistate of species is dramatically simplified to a single acid-base equilibrium between flavylium cation and its conjugated base CB, equal to the sum of quinoidal base, hemiketal, and cis and trans-chalcones. Bearing this, a new equation that simultaneously allows calculation of the co-pigmentation constant with flavylium cation (KAH+CP) and with its conjugated base CB (KCBCP) was deduced. This equation can be used at a fixed co-pigment concentration with pH as a variable or at fixed pH and co-pigment concentration variable. A global fitting of all data allows us to calculate both association constants with good accuracy. The model was applied to the co-pigmentation of malvidin-3-glucoside with caffeine and pentagalloyl glucose (PGG). Caffeine gives rise to complexes not only with flavylium cation KAH+CP = 125 ± 7 M-1 but also with CB with KCBCP = 23 ± 3 M-1. PGG complexes exclusively with flavylium cation, KAH+CP = 914 ± 10 M-1, and the possible interaction with quinoidal base is lower than the detection limits that the inherent experimental error permits.
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Affiliation(s)
- Joana Oliveira
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Joana Azevedo
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Natércia Teixeira
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Paula Araújo
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Victor de Freitas
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Nuno Basílio
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Fernando Pina
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Van Meter MI, Khan SM, Taulbee-Cotton BV, Dimmitt NH, Hubbard ND, Green AM, Webster GK, McVey PA. Diagnosis of Agglomeration and Crystallinity of Active Pharmaceutical Ingredients in Over the Counter Headache Medication by Electrospray Laser Desorption Ionization Mass Spectrometry Imaging. Molecules 2021; 26:molecules26030610. [PMID: 33503894 PMCID: PMC7865442 DOI: 10.3390/molecules26030610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 11/17/2022] Open
Abstract
Agglomeration of active pharmaceutical ingredients (API) in tablets can lead to decreased bioavailability in some enabling formulations. In a previous study, we determined that crystalline APIs can be detected as agglomeration in tablets formulated with amorphous acetaminophen tablets. Multiple method advancements are presented to better resolve agglomeration caused by crystallinity in standard tablets. In this study, we also evaluate three “budget” over-the-counter headache medications (subsequently labeled as brands A, B, and C) for agglomeration of the three APIs in the formulation: Acetaminophen, aspirin, and caffeine. Electrospray laser desorption ionization mass spectrometry imaging (ELDI-MSI) was used to diagnose agglomeration in the tablets by creating molecular images and observing the spatial distributions of the APIs. Brand A had virtually no agglomeration or clustering of the active ingredients. Brand B had extensive clustering of aspirin and caffeine, but acetaminophen was observed in near equal abundance across the tablet. Brand C also had extensive clustering of aspirin and caffeine, and minor clustering of acetaminophen. These results show that agglomeration with active ingredients in over-the-counter tablets can be simultaneously detected using ELDI-MS imaging.
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Affiliation(s)
- Mariann Inga Van Meter
- Department of Chemistry, Marian University, Indianapolis, IN 46222, USA; (M.I.V.M.); (B.V.T.-C.); (N.H.D.); (N.D.H.)
| | - Salah M. Khan
- College of Osteopathic Medicine, Marian University, Indianapolis, IN 46222, USA; (S.M.K.); (A.M.G.)
| | - Brynne V. Taulbee-Cotton
- Department of Chemistry, Marian University, Indianapolis, IN 46222, USA; (M.I.V.M.); (B.V.T.-C.); (N.H.D.); (N.D.H.)
| | - Nathan H. Dimmitt
- Department of Chemistry, Marian University, Indianapolis, IN 46222, USA; (M.I.V.M.); (B.V.T.-C.); (N.H.D.); (N.D.H.)
| | - Nathan D. Hubbard
- Department of Chemistry, Marian University, Indianapolis, IN 46222, USA; (M.I.V.M.); (B.V.T.-C.); (N.H.D.); (N.D.H.)
| | - Adam M. Green
- College of Osteopathic Medicine, Marian University, Indianapolis, IN 46222, USA; (S.M.K.); (A.M.G.)
| | | | - Patrick A. McVey
- Department of Chemistry, Marian University, Indianapolis, IN 46222, USA; (M.I.V.M.); (B.V.T.-C.); (N.H.D.); (N.D.H.)
- College of Osteopathic Medicine, Marian University, Indianapolis, IN 46222, USA; (S.M.K.); (A.M.G.)
- Correspondence: ; Tel.: +1-317-955-6481
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Shao XT, Cong ZX, Liu SY, Wang Z, Zheng XY, Wang DG. Spatial analysis of metformin use compared with nicotine and caffeine consumption through wastewater-based epidemiology in China. Ecotoxicol Environ Saf 2021; 208:111623. [PMID: 33396143 DOI: 10.1016/j.ecoenv.2020.111623] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/30/2020] [Accepted: 11/04/2020] [Indexed: 05/08/2023]
Abstract
Monitoring the consumption of pharmaceuticals and licit drugs is important for assessing the needs of public health owing to the impact on individuals as well as society. The present work applied wastewater-based epidemiology to profile the spatial patterns of metformin, nicotine, and caffeine use and their correlations. Influent wastewater samples were collected from 27 wastewater treatment plants in 22 typical Chinese cities that covered all geographic regions of the country. The consumption of metformin ranged from 0.02 g/d/1000 inh to 8.92 g/d/1000 inh, whereas caffeine and nicotine consumption ranged from 4.33 g/d/1000 inh to 394 g/d/1000 inh and 0.17 g/d/1000 inh to 1.88 g/d/1000 inh, respectively. There were significant regional differences in the consumption of caffeine, with the highest consumption in East China and the lowest consumption in Northeast China. The consumption and concentration of caffeine were related to the gross domestic product and per capita disposable income of urban residents, respectively. There was a correlation between the concentrations of caffeine and cotinine (a nicotine metabolite), thereby indicating that individuals that use one of these substances are likely to use the other substance. A significant relationship was found between the concentration of metformin and cotinine, thereby implying that the use of tobacco may be correlated with type 2 diabetes. Co-analysis of these substances in wastewater may provide a more accurate picture of substance use situations within different communities and provide more information on human health, human behavior, and the economy. This report describes the newest study related to the consumption of metformin among the general population in China.
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Affiliation(s)
- Xue-Ting Shao
- College of Environmental Science and Engineering, Dalian Maritime University, No. 1 Linghai Road, Dalian 116026, China
| | - Zi-Xiang Cong
- College of Environmental Science and Engineering, Dalian Maritime University, No. 1 Linghai Road, Dalian 116026, China
| | - Si-Yu Liu
- College of Environmental Science and Engineering, Dalian Maritime University, No. 1 Linghai Road, Dalian 116026, China
| | - Zhuang Wang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, No. 219 Ningliu Road, Nanjing 210044, China
| | - Xiao-Yu Zheng
- Institute of Forensic Science, Ministry of Public Security, China
| | - De-Gao Wang
- College of Environmental Science and Engineering, Dalian Maritime University, No. 1 Linghai Road, Dalian 116026, China.
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Jiang X, Lu Y, Lv L. Trapping Acrolein by Theophylline/Caffeine and Their Metabolites from Green Tea and Coffee in Mice and Humans. J Agric Food Chem 2020; 68:14471-14479. [PMID: 33253558 DOI: 10.1021/acs.jafc.0c05483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Acrolein (ACR) is found exogenously as a widespread environmental pollutant and endogenously, where it is thought to be involved as a pathogenic factor in the progression of many pathological conditions. Eliminating ACR by dietary-active substances has been found to be one potential strategy to prevent ACR-associated chronic diseases. This study first compared the scavenging ACR efficacy of four purine alkaloids, theophylline (TP), paraxanthine (PXT), theobromine (TB), and caffeine (CAF), and then, TP, CAF, and their metabolites were investigated for their ability to trap ACR in vivo. Our results indicated that TP, which possesses an -NH moiety at the N-7 position, exhibits the best ACR-trapping capacity in vitro, while CAF has a slight ability to trap ACR due to the substitutions by -CH3 at the N-1, N-3, and N-7 positions. After oral administration of TP or CAF, the ACR adducts of TP and the metabolites of TP or CAF (e.g., mono- and di-ACR-TP, mono-ACR-1,3-DMU, and mono-ACR-1-MU) were detected in urinary samples obtained from both TP- and CAF-treated mouse groups by using ultra-performance liquid chromatography-tandem mass spectrometry. The quantification studies demonstrated that TP and its metabolites significantly trapped ACR in a dose-dependent manner in vivo. Furthermore, we also detected those ACR adducts of TP and TP/CAF's metabolites in human urine after four cups of green tea (2 g tea leaf/cup) or two cups of coffee (4 g coffee/cup) were consumed per day. Those results indicated that dietary TP or CAF has the potential capacity to scavenge ACR in vivo.
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Affiliation(s)
- Xiaoyun Jiang
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Nanjing 210023, P.R. China
| | - Yongling Lu
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Nanjing 210023, P.R. China
| | - Lishuang Lv
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Nanjing 210023, P.R. China
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Meier‐Menches SM, Neuditschko B, Zappe K, Schaier M, Gerner MC, Schmetterer KG, Del Favero G, Bonsignore R, Cichna‐Markl M, Koellensperger G, Casini A, Gerner C. An Organometallic Gold(I) Bis-N-Heterocyclic Carbene Complex with Multimodal Activity in Ovarian Cancer Cells. Chemistry 2020; 26:15528-15537. [PMID: 32902006 PMCID: PMC7756355 DOI: 10.1002/chem.202003495] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Indexed: 02/06/2023]
Abstract
The organometallic AuI bis-N-heterocyclic carbene complex [Au(9-methylcaffeine-8-ylidene)2 ]+ (AuTMX2 ) was previously shown to selectively and potently stabilise telomeric DNA G-quadruplex (G4) structures. This study sheds light on the molecular reactivity and mode of action of AuTMX2 in the cellular context using mass spectrometry-based methods, including shotgun proteomics in A2780 ovarian cancer cells. In contrast to other metal-based anticancer agents, this organogold compound is less prone to form coordinative bonds with biological nucleophiles and is expected to exert its drug effects mainly by non-covalent interactions. Global protein expression changes of treated cancer cells revealed a multimodal mode of action of AuTMX2 by alterations in the nucleolus, telomeres, actin stress-fibres and stress-responses, which were further supported by pharmacological assays, fluorescence microscopy and cellular accumulation experiments. Proteomic data are available via ProteomeXchange with identifier PXD020560.
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Affiliation(s)
- Samuel M. Meier‐Menches
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Benjamin Neuditschko
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
- Institute of Inorganic ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 421090ViennaAustria
| | - Katja Zappe
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Martin Schaier
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Marlene C. Gerner
- Department of Laboratory MedicineMedical University of ViennaWaehringer Guertel 18–201090ViennaAustria
| | - Klaus G. Schmetterer
- Department of Laboratory MedicineMedical University of ViennaWaehringer Guertel 18–201090ViennaAustria
| | - Giorgia Del Favero
- Department of Food Chemistry and ToxicologyFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
- Core Facility Multimodal ImagingFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Riccardo Bonsignore
- Department of ChemistryTechnical University of MunichLichtenbergstr. 485747GarchingGermany
| | - Margit Cichna‐Markl
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Gunda Koellensperger
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
| | - Angela Casini
- Department of ChemistryTechnical University of MunichLichtenbergstr. 485747GarchingGermany
| | - Christopher Gerner
- Department of Analytical ChemistryFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
- Core Facility Multimodal ImagingFaculty of ChemistryUniversity of ViennaWaehringer Str. 381090ViennaAustria
- Joint Metabolome FacilityUniversity of Vienna and Medical University of ViennaWaehringer Str. 381090ViennaAustria
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Wang YJ, Li TH, Li LQ, Ning JM, Zhang ZZ. Micro-NIR spectrometer for quality assessment of tea: Comparison of local and global models. Spectrochim Acta A Mol Biomol Spectrosc 2020; 237:118403. [PMID: 32361319 DOI: 10.1016/j.saa.2020.118403] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/10/2020] [Accepted: 04/20/2020] [Indexed: 05/25/2023]
Abstract
Near-infrared (NIR) spectroscopy is an effective tool for analyzing components relevant to tea quality, especially catechins and caffeine. In this study, we predicted catechins and caffeine content in green and black tea, the main consumed tea types worldwide, by using a micro-NIR spectrometer connected to a smartphone. Local models were established separately for green and black tea samples, and these samples were combined to create global models. Different spectral preprocessing methods were combined with linear partial-least squares regression and nonlinear support vector machine regression (SVR) to obtain accurate models. Standard normal variate (SNV)-based SNV-SVR models exhibited accurate predictive performance for both catechins and caffeine. For the prediction of quality components of tea, the global models obtained results comparable to those of the local models. The optimal global models for catechins and caffeine were SNV-SVR and particle swarm optimization (PSO)-simplified SNV-PSO-SVR, which achieved the best predictive performance with correlation coefficients in prediction (Rp) of 0.98 and 0.93, root mean square errors in prediction of 9.83 and 2.71, and residual predictive deviations of 4.44 and 2.60, respectively. Therefore, the proposed low-price, compact, and portable micro-NIR spectrometer connected to smartphones is an effective tool for analyzing tea quality.
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Affiliation(s)
- Yu-Jie Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Tie-Han Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Lu-Qing Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Jing-Ming Ning
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China.
| | - Zheng-Zhu Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China.
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Meneguin AB, da Silva Barud H, Sábio RM, de Sousa PZ, Manieri KF, de Freitas LAP, Pacheco G, Alonso JD, Chorilli M. Spray-dried bacterial cellulose nanofibers: A new generation of pharmaceutical excipient intended for intestinal drug delivery. Carbohydr Polym 2020; 249:116838. [PMID: 32933682 DOI: 10.1016/j.carbpol.2020.116838] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/01/2020] [Accepted: 07/28/2020] [Indexed: 12/16/2022]
Abstract
Defibrillation of bacterial cellulose by ultra-refining was efficient to release nanofibers (BCNF) which were spray dried with the matrices formers mannitol (MN), maltodextrin or hydroxypropylmethylcellulose. The best microsystem comprised the association of BCNF and MN, so the selected microparticles were loaded with diclofenac sodium or caffeine. Depending on the proportion of BCNF, the nanofibers collapse promoted by spray drying can occur onto surface or into microparticles core, leading to different release behaviors. Samples showed pH-dependent drug release, so the microsystem developed with the lowest BCNF concentration showed important trend to gastroresistance. Caffeine was spray dried as a free drug and for this reason it was devoid of any control over release rates. The set of results showed BCNF can be considered an interesting and potential pharmaceutical excipient for lipophilic drugs. Beyond that, BCNF association with MN can lead to novel enteric drug delivery systems based on natural polymers.
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Affiliation(s)
- Andréia Bagliotti Meneguin
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil.
| | - Hernane da Silva Barud
- Laboratory of Biopolymers and Biomaterials, University of Araraquara, Araraquara, São Paulo, 14801-320, Brazil
| | - Rafael Miguel Sábio
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil
| | - Paula Zanin de Sousa
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - Karyn Fernanda Manieri
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil
| | | | - Guilherme Pacheco
- Laboratory of Biopolymers and Biomaterials, University of Araraquara, Araraquara, São Paulo, 14801-320, Brazil
| | - Jovan Duran Alonso
- Analytical Chemistry Department, São Paulo State University, Araraquara, São Paulo, 14801-970, Brazil
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil
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Abraham BL, Toriki ES, Tucker NJ, Nilsson BL. Electrostatic interactions regulate the release of small molecules from supramolecular hydrogels. J Mater Chem B 2020; 8:6366-6377. [PMID: 32596699 PMCID: PMC7429908 DOI: 10.1039/d0tb01157f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Supramolecular hydrogels have great potential as biomaterials for sustained delivery of therapeutics. While peptide-based supramolecular hydrogels have been developed that show promise for drug delivery applications, the high cost of production has limited their widespread adoption. Low molecular weight (LMW) supramolecular hydrogels are emerging as attractive and inexpensive alternatives to peptide-based hydrogels. We recently reported novel cationic fluorenylmethyloxycarbonyl-modified phenylalanine (Fmoc-Phe) hydrogels for localized and sustained in vivo release of an anti-inflammatory agent for functional pain remediation. In an effort to further elucidate design principles to optimize these materials for delivery of a variety of molecular agents, we herein report a systematic examination of electrostatic effects on the release of cargo molecules from Fmoc-Phe derived hydrogels. Specifically, we interrogate the release of cationic, anionic, and neutral cargo molecules from a series of cationic and anionic Fmoc-Phe derived hydrogels. We observed that cargo was readily released from the hydrogels except when the cargo and hydrogel network had complementary charges, in which case the cargo was highly retained in the network. These results demonstrate that the electrostatic characteristics of both the hydrogel network and the specific cargo are critical design parameters in the formulation of LMW supramolecular hydrogel systems in the development of next-generation materials for drug delivery applications.
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Affiliation(s)
- Brittany L Abraham
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
| | - Ethan S Toriki
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
| | - N'Dea J Tucker
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
| | - Bradley L Nilsson
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
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Unno K, Furushima D, Nomura Y, Yamada H, Iguchi K, Taguchi K, Suzuki T, Ozeki M, Nakamura Y. Antidepressant Effect of Shaded White Leaf Tea Containing High Levels of Caffeine and Amino Acids. Molecules 2020; 25:molecules25153550. [PMID: 32756488 PMCID: PMC7435365 DOI: 10.3390/molecules25153550] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/21/2020] [Accepted: 07/31/2020] [Indexed: 12/19/2022] Open
Abstract
The young leaves of green tea become lighter in color than usual when protected from sunlight by a shading net for about two weeks while growing. These leaves are called "shaded white leaf tea" or SWLT. In the eluate of SWLT, the amount of amino acids (361 mg/L) was significantly higher than that in regular tea (53.5 mg/L). Since theanine and arginine, the first and second most abundant amino acids in SWLT, have significant antistress effects, we examined the antistress effect of SWLT on humans. SWLT or placebo green tea (3 g) was eluted with room-temperature water (500 mL). Participants consumed the tea for one week prior to pharmacy practice and continued for 10 days in the practice period. The state-trait anxiety inventory, an anxiety questionnaire, tended to be scored lower in the SWLT group than the placebo, but other stress markers showed no differences. The effect of the difference in SWLT components examined with mice showed that aspartic acid and asparagine, which are abundant in SWLT, counteracted the antistress effects of theanine and arginine. Large amounts of caffeine also interfered with SWLT's antistress effect. Thus, SWLT, which is high in caffeine and amino acids, suppressed depressant behavior in mice.
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Affiliation(s)
- Keiko Unno
- Tea Science Center, Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan;
- Correspondence: ; Tel.: +81-54-264-5822
| | - Daisuke Furushima
- Department of Drug Evaluation & Informatics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.N.); (H.Y.)
| | - Yuzuki Nomura
- Department of Drug Evaluation & Informatics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.N.); (H.Y.)
| | - Hiroshi Yamada
- Department of Drug Evaluation & Informatics, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.N.); (H.Y.)
| | - Kazuaki Iguchi
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan;
| | - Kyoko Taguchi
- Tea Science Center, Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
| | - Toshikazu Suzuki
- Tea Research Center, Shizuoka Prefectural Research Institute of Agriculture and Forestry, Kikugawa, Shizuoka 439-0002, Japan;
| | - Makoto Ozeki
- Nutrition Division, R&D Group, Taiyo Kagaku Co., Ltd., Yokkaichi, Mie 510-0844, Japan;
| | - Yoriyuki Nakamura
- Tea Science Center, Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
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Escalona-Durán F, Ribeiro da Silva D, Martínez-Huitle CA, Villegas-Guzman P. The synergic persulfate-sodium dodecyl sulfate effect during the electro-oxidation of caffeine using active and non-active anodes. Chemosphere 2020; 253:126599. [PMID: 32278188 DOI: 10.1016/j.chemosphere.2020.126599] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 03/12/2020] [Accepted: 03/21/2020] [Indexed: 06/11/2023]
Abstract
It has previously been established during the elimination of organic matter that the addition of sodium dodecyl sulfate in solution is an important condition in the electrochemical oxidation approach that allows to increase the production of persulfate, enhancing the efficacy of the treatment. This outcome was observed when using the anodic oxidation with boron doped diamond (BDD), the extra production of persulfate was achieved after the SDS-sulfate released in solution and it reacts with hydroxyl radicals electrogenerated at BDD surface. However, this effect was not already tested by using active anodes. For this reason, the effect of sodium dodecyl sulfate (SDS) during the electrochemical treatment of caffeine was investigated by comparing non-active and active anodes performances. A significant decrease on the oxidation efficiency of caffeine was observed by using Ti/IrO2-Ta2O5 anode at high current density when SDS was added to the solution. Conversely, at BDD anode, the presence of SDS enhanced the degradation efficiency, depending on the applied current density. This behavior is mainly due to the degradation of SDS molecules, which allows to increase the amount of sulfate in solution, promoting the production of persulfate via the mechanism involving hydroxyl radicals when BDD is used. Meanwhile, no oxidation improvements were observed when Ti/IrO2-Ta2O5 anode was employed, limiting the caffeine oxidation. Results clearly showed that the surfactant concentration had little influence on the degradation efficiency, but this result is satisfactory for the BDD system, since it demonstrates that effluents with complex matrices containing surfactants could be effectively degraded using the electrooxidation technique. Degradation mechanisms were explained by electrochemical measurements (polarization curves) as well as the kinetic analysis. Costs and energy consumption were also evaluated.
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Affiliation(s)
- Florymar Escalona-Durán
- Institute of Chemistry, Environmental and Applied Electrochemistry Laboratory, Federal University of Rio Grande do Norte, Lagoa Nova, CEP, 59078-970, Natal, RN, Brazil
| | - Djalma Ribeiro da Silva
- Institute of Chemistry, Environmental and Applied Electrochemistry Laboratory, Federal University of Rio Grande do Norte, Lagoa Nova, CEP, 59078-970, Natal, RN, Brazil
| | - Carlos A Martínez-Huitle
- Institute of Chemistry, Environmental and Applied Electrochemistry Laboratory, Federal University of Rio Grande do Norte, Lagoa Nova, CEP, 59078-970, Natal, RN, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, Unesp, P.O. Box 355, 14800-900, Araraquara, SP, Brazil.
| | - Paola Villegas-Guzman
- Institute of Chemistry, Environmental and Applied Electrochemistry Laboratory, Federal University of Rio Grande do Norte, Lagoa Nova, CEP, 59078-970, Natal, RN, Brazil; Centro de Investigaciones UNINAVARRA - CINA, Fundación Universitaria Navarra - UNINAVARRA, Calle 10 No. 6 - 41. Primer Piso, Neiva, Huila, Colombia.
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Lang T, Lang R, Di Pizio A, Mittermeier VK, Schlagbauer V, Hofmann T, Behrens M. Numerous Compounds Orchestrate Coffee's Bitterness. J Agric Food Chem 2020; 68:6692-6700. [PMID: 32437139 DOI: 10.1021/acs.jafc.0c01373] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Coffee is one of the most consumed hot beverages worldwide and is highly regarded because of its stimulating effect despite having a pronounced bitterness. Even though numerous bitter ingredients have been identified, the detailed molecular basis for coffee's bitterness is not well understood except for caffeine, which activates five human bitter taste receptors. We elucidated the contribution of other bitter coffee constituents in addition to caffeine with functional calcium imaging experiments using mammalian cells expressing the cDNAs of human bitter taste receptors, sensory experiments, and in silico modeling approaches. We identified two human bitter taste receptors, TAS2R43 and TAS2R46, that responded to the bitter substance mozambioside with much higher sensitivity than to caffeine. Further, the structurally related bitter substances bengalensol, cafestol, and kahweol also activated the same pair of bitter taste receptors much more potently than the prototypical coffee bitter substance caffeine. However, for kahweol, a potent but weak activator of TAS2R43 and TAS2R46, we observed an inhibitory effect when simultaneously applied together with mozambioside to TAS2R43 expressing cells. Molecular modeling experiments showed overlapping binding sites in the receptor's ligand binding cavity that suggest that the partial agonist kahweol might be useful to reduce the overall bitterness of coffee-containing beverages. Taken together, we found that the bitterness of coffee is determined by a complex interaction of multiple bitter compounds with several human bitter taste receptors.
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Affiliation(s)
- Tatjana Lang
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Roman Lang
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Antonella Di Pizio
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Verena Karolin Mittermeier
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Verena Schlagbauer
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Maik Behrens
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
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Boccia AC, Scavia G, Schizzi I, Conzatti L. Biobased Cryogels from Enzymatically Oxidized Starch: Functionalized Materials as Carriers of Active Molecules. Molecules 2020; 25:molecules25112557. [PMID: 32486387 PMCID: PMC7321214 DOI: 10.3390/molecules25112557] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 11/16/2022] Open
Abstract
Starch recovered from an agrifood waste, pea pods, was enzymatically modified and used to prepare cryogels applied as drug carriers. The enzymatic modification of starch was performed using the laccase/(2,2,6,6-tetramethylpiperidin-1-yl)oxyl TEMPO system, at a variable molar ratio. The characterization of the ensuing starches by solution NMR spectroscopy showed partial conversion of the primary hydroxyl groups versus aldehyde and carboxyl groups and successive creation of hemiacetal and ester bonds. Enzymatically modified starch after simple freezing and lyophilization process provided stable and compact cryogels with a morphology characterized by irregular pores, as determined by atomic force (AFM) and scanning electron microscopy (SEM). The application of cryogels as carriers of active molecules was successfully evaluated by following two different approaches of loading with drugs: a) as loaded sponge, by adsorption of drug from the liquid phase; and b) as dry-loaded cryogel, from a dehydration step added to loaded cryogel from route (a). The efficiency of the two routes was studied and compared by determining the drug release profile by proton NMR studies over time. Preliminary results demonstrated that cryogels from modified starch are good candidates to act as drug delivery systems due to their stability and prolonged residence times of loaded molecules, opening promising applications in biomedical and food packaging scenarios.
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Affiliation(s)
- Antonella Caterina Boccia
- Institute for Chemical Sciences and Technologies-SCITEC “G. Natta”, CNR, Via Corti, 12, 20133 Milano, Italy;
- Correspondence: ; Tel.: +39-02-236-99-212
| | - Guido Scavia
- Institute for Chemical Sciences and Technologies-SCITEC “G. Natta”, CNR, Via Corti, 12, 20133 Milano, Italy;
| | - Ilaria Schizzi
- Institute for Chemical Sciences and Technologies-SCITEC “G. Natta”, CNR, Via De Marini, 6, 16149 Genova, Italy; (I.S.); (L.C.)
| | - Lucia Conzatti
- Institute for Chemical Sciences and Technologies-SCITEC “G. Natta”, CNR, Via De Marini, 6, 16149 Genova, Italy; (I.S.); (L.C.)
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Correa-Navarro YM, Giraldo L, Moreno-Piraján JC. Biochar from Fique Bagasse for Remotion of Caffeine and Diclofenac from Aqueous Solution. Molecules 2020; 25:molecules25081849. [PMID: 32316491 PMCID: PMC7221906 DOI: 10.3390/molecules25081849] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/04/2020] [Accepted: 04/06/2020] [Indexed: 01/08/2023] Open
Abstract
Caffeine and diclofenac are molecules with high human intake, and both belong to the ‘emergent’ class of contaminants. These compounds have been found at different concentrations in many sources of water worldwide and have several negative impacts on aquatic life systems; that is why the search for new alternatives for their removal from aqueous media is of transcendental importance. In this sense, adsorption processes are an option to attack this problem and for this reason, biochar could be a good alternative. In this regard, were prepared six different biochar from fique bagasse (FB), a useless agroindustry by-product from fique processing. The six biochar preparations were characterized through several physicochemical procedures, while for the adsorption processes, pH, adsorption time and concentration of caffeine and diclofenac were evaluated. Results showed that the biochar obtained by pyrolysis at 850 °C and residence time of 3 h, labeled as FB850-3, was the material with the highest adsorbent capacity with values of 40.2 mg g−1 and 5.40 mg g−1 for caffeine and diclofenac, respectively. It was also shown that the experimental data from FB850-3 fitted very well the Redlich–Peterson isotherm model and followed a pseudo-first and pseudo-second-order kinetic for caffeine and diclofenac, respectively.
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Affiliation(s)
- Yaned Milena Correa-Navarro
- Departamento de Química, Universidad de Caldas, Calle 65 No. 26–10, Manizales 170004, Caldas, Colombia;
- Departamento de Química, Universidad de los Andes, Carrera 1 No. 18 A–12, Bogotá D.C. 111711, Colombia
| | - Liliana Giraldo
- Departamento de Química, Universidad Nacional de Colombia, Sede Bogotá. Carrera 30 No. 45–03, Bogotá D.C. 11001, Colombia;
| | - Juan Carlos Moreno-Piraján
- Departamento de Química, Universidad de los Andes, Carrera 1 No. 18 A–12, Bogotá D.C. 111711, Colombia
- Correspondence: ; Tel.: +571-339-4949 (ext. 3465-3478-4753)
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Shyamlal BRK, Mathur M, Yadav DK, Chaudhary S. Microwave-assisted modified synthesis of C 8-analogues of naturally occurring methylxanthines: Synthesis, biological evaluation and their practical applications. Fitoterapia 2020; 143:104533. [PMID: 32145313 DOI: 10.1016/j.fitote.2020.104533] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/26/2020] [Accepted: 03/01/2020] [Indexed: 01/17/2023]
Abstract
An efficient, microwave-assisted, oxidant-interceded, transition-metal-free, cross-dehydrogenative Csp2-Csp3 coupling of C8-Caffeine 2/Theobromine 3/theophylline 4 with substituted aliphatic alcohols 11a-lvia CH bond activation for the preparation of series of substituted C8-(hydroxymethyl) Caffeine 12a-l/theobromine 13a-c/theophylline 14a-b has been developed using microwave irradiation upto 98% yield. The reaction proceeds smoothly in the presence of tert-butyl hydroperoxide (TBHP) under solvolysis condition at 120 °C for 20 min to corresponding substituted C8-(hydroxymethyl)-methylxanthine derivatives in good to excellent yields. The good substrate scope, control experiments, gram-scale synthesis, and practical synthetic transformations further highlights the practicality of this methodology. These C8-(hydroxymethyl) Caffeine 12a-l, 13a-c and 14a-b have been found to show promising in vitro antioxidant as well as antiplatelet activities.
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Affiliation(s)
- Bharti Rajesh Kumar Shyamlal
- Laboratory of Organic & Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
| | - Manas Mathur
- School of Agriculture, Suresh Gyan Vihar University, Mahal Road, Jagatpura, Jaipur 302017, India
| | - Dharmendra K Yadav
- Gachon Institute of Pharmaceutical Sciences, Department of Pharmacy, College of Pharmacy, Gachon University of Medicine and Science, Incheon 21936, South Korea
| | - Sandeep Chaudhary
- Laboratory of Organic & Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India.
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Wychodnik K, Gałęzowska G, Rogowska J, Potrykus M, Plenis A, Wolska L. Poultry Farms as a Potential Source of Environmental Pollution by Pharmaceuticals. Molecules 2020; 25:molecules25051031. [PMID: 32106589 PMCID: PMC7179153 DOI: 10.3390/molecules25051031] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/21/2020] [Accepted: 02/23/2020] [Indexed: 12/28/2022] Open
Abstract
Industrial poultry breeding is associated with the need to increase productivity while maintaining low meat prices. Little is known about its impact on the environment of soil pollution by pharmaceuticals. Breeders routinely use veterinary pharmaceuticals for therapeutic and preventive purposes. The aim of this work was to determine the influence of mass breeding of hens on the soil contamination with 26 pharmaceuticals and caffeine. During two seasons—winter and summer 2019—15 soil samples were collected. Liquid extraction was used to isolate analytes from samples. Extracts were analyzed using ultra-high performance liquid chromatography coupled with tandem mass spectrometry detection (UPLC-MS/MS). The results showed the seasonal changes in pharmaceutical presence in analyzed soil samples. Ten pharmaceuticals (metoclopramide, sulphanilamide, salicic acid, metoprolol, sulphamethazine, nimesulide, carbamazepine, trimethoprim, propranolol, and paracetamol) and caffeine were determined in soil samples collected in March, and five pharmaceuticals (metoclopramide, sulphanilamide, sulphamethazine, carbamazepine, sulfanilamid) in soil samples collected in July. The highest concentrations were observed for sulphanilamide, in a range from 746.57 ± 15.61 ng/g d.w to 3518.22 ± 146.05 ng/g d.w. The level of bacterial resistance to antibiotics did not differ between samples coming from intensive breeding farm surroundings and the reference area, based on antibiotic resistance of 85 random bacterial isolates.
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Affiliation(s)
- Katarzyna Wychodnik
- Department of Environmental Toxicology, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Debowa 23A St., 80-204 Gdańsk, Poland; (K.W.); (G.G.); (J.R.); (M.P.)
| | - Grażyna Gałęzowska
- Department of Environmental Toxicology, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Debowa 23A St., 80-204 Gdańsk, Poland; (K.W.); (G.G.); (J.R.); (M.P.)
| | - Justyna Rogowska
- Department of Environmental Toxicology, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Debowa 23A St., 80-204 Gdańsk, Poland; (K.W.); (G.G.); (J.R.); (M.P.)
| | - Marta Potrykus
- Department of Environmental Toxicology, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Debowa 23A St., 80-204 Gdańsk, Poland; (K.W.); (G.G.); (J.R.); (M.P.)
| | - Alina Plenis
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Hallera 107 St., 80-416 Gdansk, Poland;
| | - Lidia Wolska
- Department of Environmental Toxicology, Faculty of Health Sciences with Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Debowa 23A St., 80-204 Gdańsk, Poland; (K.W.); (G.G.); (J.R.); (M.P.)
- Correspondence: ; Tel.: +48-58-349-19-39
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Silva NHCS, Mota JP, Santos de Almeida T, Carvalho JPF, Silvestre AJD, Vilela C, Rosado C, Freire CSR. Topical Drug Delivery Systems Based on Bacterial Nanocellulose: Accelerated Stability Testing. Int J Mol Sci 2020; 21:E1262. [PMID: 32070054 PMCID: PMC7072910 DOI: 10.3390/ijms21041262] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/08/2020] [Accepted: 02/11/2020] [Indexed: 01/06/2023] Open
Abstract
Bacterial nanocellulose (BNC) membranes have enormous potential as systems for topical drug delivery due to their intrinsic biocompatibility and three-dimensional nanoporous structure, which can house all kinds of active pharmaceutical ingredients (APIs). Thus, the present study investigated the long-term storage stability of BNC membranes loaded with both hydrophilic and lipophilic APIs, namely, caffeine, lidocaine, ibuprofen and diclofenac. The storage stability was evaluated under accelerated testing conditions at different temperatures and relative humidity (RH), i.e., 75% RH/40 °C, 60% RH/25 °C and 0% RH/40 °C. All systems were quite stable under these storage conditions with no significant structural and morphological changes or variations in the drug release profile. The only difference observed was in the moisture-uptake, which increased with RH due to the hydrophilic nature of BNC. Furthermore, the caffeine-loaded BNC membrane was selected for in vivo cutaneous compatibility studies, where patches were applied in the volar forearm of twenty volunteers for 24 h. The cutaneous responses were assessed by non-invasive measurements and the tests revealed good compatibility for caffeine-loaded BNC membranes. These results highlight the good storage stability of the API-loaded BNC membranes and their cutaneous compatibility, which confirms the real potential of these dermal delivery systems.
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Affiliation(s)
- Nuno H. C. S. Silva
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (N.H.C.S.S.); (J.P.F.C.); (A.J.D.S.); (C.V.)
| | - Joana P. Mota
- CBIOS–Research Center for Biosciences and Health Technologies, Lusófona University, Campo Grande 376, 1749-024 Lisbon, Portugal; (J.P.M.); (T.S.d.A.)
| | - Tânia Santos de Almeida
- CBIOS–Research Center for Biosciences and Health Technologies, Lusófona University, Campo Grande 376, 1749-024 Lisbon, Portugal; (J.P.M.); (T.S.d.A.)
| | - João P. F. Carvalho
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (N.H.C.S.S.); (J.P.F.C.); (A.J.D.S.); (C.V.)
| | - Armando J. D. Silvestre
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (N.H.C.S.S.); (J.P.F.C.); (A.J.D.S.); (C.V.)
| | - Carla Vilela
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (N.H.C.S.S.); (J.P.F.C.); (A.J.D.S.); (C.V.)
| | - Catarina Rosado
- CBIOS–Research Center for Biosciences and Health Technologies, Lusófona University, Campo Grande 376, 1749-024 Lisbon, Portugal; (J.P.M.); (T.S.d.A.)
| | - Carmen S. R. Freire
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (N.H.C.S.S.); (J.P.F.C.); (A.J.D.S.); (C.V.)
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Du C, Ma C, Gu J, Li L, Chen G. Fluorescence Sensing of Caffeine in Tea Beverages with 3,5-diaminobenzoic Acid. Sensors (Basel) 2020; 20:s20030819. [PMID: 32028737 PMCID: PMC7038766 DOI: 10.3390/s20030819] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/21/2020] [Accepted: 01/31/2020] [Indexed: 02/05/2023]
Abstract
A rapid, selective and sensitive method for the detection of caffeine in tea infusion and tea beverages are proposed by using 3,5-diaminobenzoic acid as a fluorescent probe. The 3,5-diaminobenzoic acid emits strong fluorescence around 410 nm under the excitation of light at 280 nm. Both the molecular electrostatic potential analysis and fluorescent lifetime measurement proved that the existence of caffeine can quench the fluorescence of 3,5-diaminobenzoic acid. Under the optimal experimental parameters, the 3,5-diaminobenzoic acid was used as a fluorescent probe to detect the caffeine aqueous solution. There exists a good linear relationship between the fluorescence quenching of the fluorescent probe and the concentration of caffeine in the range of 0.1–100 μM, with recovery within 96.0 to 106.2%, while the limit of detection of caffeine is 0.03 μM. This method shows a high selectivity for caffeine. The caffeine content in different tea infusions and tea beverages has been determined and compared with the results from HPLC measurement.
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Affiliation(s)
- Chenxu Du
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
| | - Chaoqun Ma
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
| | - Jiao Gu
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
| | - Lei Li
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
| | - Guoqing Chen
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
- Correspondence: ; Tel.: +86-139-0617-6695
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Tanji K, Navio JA, Martín-Gómez AN, Hidalgo MC, Jaramillo-Páez C, Naja J, Hassoune H, Kherbeche A. Role of Fe(III) in aqueous solution or deposited on ZnO surface in the photoassisted degradation of rhodamine B and caffeine. Chemosphere 2020; 241:125009. [PMID: 31597109 DOI: 10.1016/j.chemosphere.2019.125009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/03/2019] [Accepted: 09/28/2019] [Indexed: 06/10/2023]
Abstract
Iron (III) was incorporated, to the surface of a synthesized ZnO, using two nominal molar percentages of Fe (III): 1% and 5% Fe relative to ZnO. Samples dried and calcined at 200 °C and 400 °C for 2 h, were characterized by XRD, XPS, XRF, N2-adsorption-BET and (UV-vis)-DRS. Photocatalytic activities of the catalysts were assessed based on the degradation of rhodamine B (RhB) and caffeine (CAF) in aqueous solution under two irradiation conditions: UV and visible light illumination. Prior to the photocatalytic tests, the interaction of each one of the substrates with either Fe(III) or Fe(II) was studied in homogeneous medium under UV-illumination and oxygenated environment. It was found that Fe (III) can play an important role in homogeneous media in the photoassisted degradation, both of rhodamine B and caffeine, while Fe (II) does not exert a relevant role in the photoassisted degradation of the referred substrates. Fe-ZnO samples display similar or poorer performance than pure ZnO in the presence of UV light for both studied substrates. The phenomenon can be attributed to the formation of either goethite or ZnFe2O4 at the ZnO surface where the coupled Fe3+/Fe2+ can act as recombination centers for the photogenerated charges. On the contrary, all Fe-ZnO samples showed enhanced photocatalytic activity under visible illumination which seems to be independent of the iron content. In this context, the mechanisms for photoassisted degradation of both the substrates in homogeneous medium and photocatalytic degradation are discussed, as well as the role of Fe in the photodegradation processes.
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Affiliation(s)
- Karim Tanji
- Laboratoire de Catalyse, Materiaux et Environnement (LCME), Université Sidi Mohammed Ben Abdellah, Fès, Route d'Imouzzer, BP, 2427, Fès, Morocco
| | - J A Navio
- Instituto de Ciencia de Materiales de Sevilla (ICMS), Centro Mixto Universidad de Sevilla-CSIC, Américo Vespucio 49, 41092, Sevilla, Spain.
| | - A N Martín-Gómez
- Instituto de Ciencia de Materiales de Sevilla (ICMS), Centro Mixto Universidad de Sevilla-CSIC, Américo Vespucio 49, 41092, Sevilla, Spain
| | - M C Hidalgo
- Instituto de Ciencia de Materiales de Sevilla (ICMS), Centro Mixto Universidad de Sevilla-CSIC, Américo Vespucio 49, 41092, Sevilla, Spain
| | - C Jaramillo-Páez
- Departamento de Química, Universidad del Tolima, Barrio Santa Elena, Ibagué, Colombia
| | - Jamal Naja
- Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences et Technologies de l'Université Hassan I, Settat, Morocco
| | | | - Abdelhak Kherbeche
- Laboratoire de Catalyse, Materiaux et Environnement (LCME), Université Sidi Mohammed Ben Abdellah, Fès, Route d'Imouzzer, BP, 2427, Fès, Morocco
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Zhang K, Zhang ZH, Wang H, Wang XM, Zhang XH, Xie YF. Synergistic effects of combining ozonation, ceramic membrane filtration and biologically active carbon filtration for wastewater reclamation. J Hazard Mater 2020; 382:121091. [PMID: 31472465 DOI: 10.1016/j.jhazmat.2019.121091] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 08/19/2019] [Accepted: 08/23/2019] [Indexed: 06/10/2023]
Abstract
In this study, we proposed to apply an integrated process which is comprised of in situ ozonation, ceramic membrane filtration (CMF) and biologically active carbon (BAC) filtration to wastewater reclamation for indirect potable reuse purpose. A pilot-scale (20 m3/d) experiment had been run for ten months to validate the prospect of the process in terms of treatment performance and operational stability. Results showed that the in situ O3 + CMF + BAC process performed well in pollutant removal, with chemical oxygen demand, ammonia, nitrate nitrogen, total phosphorus and turbidity levels in the treated water being 5.1 ± 0.9, 0.05 ± 0.01, 10.5 ± 0.8, <0.06 mg/L, and <0.10 NTU, respectively. Most detected trace organic compounds were degraded by>96%. This study demonstrated that synergistic effects existed in the in situ O3 + CMF + BAC process. Compared to pre-ozonation, in situ ozonation in the membrane tank was more effective in controlling membrane fouling (maintaining operational stability) and in degrading organic pollutants, which could be attributed to the higher residual ozone concentration in the tank. Because of the removal of particulate matter by CMF, water head loss of the BAC filter increased slowly and prolonged the backwashing interval to 30 days. BAC filtration was also effective in removing ammonia and N-nitrosodimethylamine from the ozonated water.
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Affiliation(s)
- Kai Zhang
- Institute for Environmental Engineering & Nano-Technology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, 518055, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zheng-Hua Zhang
- Institute for Environmental Engineering & Nano-Technology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, 518055, China
| | - Hao Wang
- Beijing Drainage Group Co., Ltd, Beijing, 100124, China
| | - Xiao-Mao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Xi-Hui Zhang
- Institute for Environmental Engineering & Nano-Technology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, 518055, China; Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Guangdong, 518055, China.
| | - Yuefeng F Xie
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; Environmental Engineering Programs, Pennsylvania State University, Middletown, PA, 17057, USA
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Abstract
4G-α-Glucopyranosylrutin (monoglucosylrutin, MGR) is a flavonol glycoside with quercetin as an aglycone, is pale yellow in color, and engages in both copigmentation and anticopigmentation. In this study, we elucidated the mechanism underlying the copigmentation of MGR upon complexation with caffeine. Three approaches were used: binding analyses based on changes in the absorbance spectrum, NOESY experiments, and DFT and TDDFT calculations using an explicit solvation model. Our findings show that copigmentation mainly results from a bathochromic shift in the absorbance spectrum and not a from hyperchromic effect. MGR and caffeine form a complex in both 1:1 and 1:2 stoichiometric ratios. The calculated optimized 1:1 and 1:2 complex structures were supported by the NOESY spectrum and form a cluster with 13 and 11 water molecules, respectively, through hydrogen bonds. Although HOMO and LUMO contribute most to the excitation of both the MGR monomer and the complexes, these frontier molecular orbitals in the complexes are distributed more widely than those in the MGR monomer. In particular, LUMO in the complexes spreads into the copigment caffeine and the solvent water molecules. This increase in electron delocalization reduces the energy gap between the frontier molecular orbitals, resulting in copigmentation with a bathochromic shift.
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Affiliation(s)
- Tomomi Ujihara
- Food Research Institute , National Agriculture and Food Research Organization (NARO) , 2-1-12 Kannondai , Tsukuba , Ibaraki 305-8642 , Japan
| | - Nobuyuki Hayashi
- Food Research Institute , National Agriculture and Food Research Organization (NARO) , 2-1-12 Kannondai , Tsukuba , Ibaraki 305-8642 , Japan
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Sebaiy MM, El-Adl SM, Mattar AA. Different techniques for overlapped UV spectra resolution of some co-administered drugs with paracetamol in their combined pharmaceutical dosage forms. Spectrochim Acta A Mol Biomol Spectrosc 2020; 224:117429. [PMID: 31394394 DOI: 10.1016/j.saa.2019.117429] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/25/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
Six simple, specific, accurate and precise spectrophotometric methods were developed for the first time analysis of some co-administered drugs with paracetamol in their mixture form without prior separation. Paracetamol & orphenadrine citrate were determined by using dual wavelength, bivariate, ratio difference, ratio derivative and mean centering of ratio spectra methods. Paracetamol & caffeine were determined by using ratio difference, ratio derivative and mean centering of ratio spectra methods. Paracetamol & diclofenac sodium were determined by using advanced absorption subtraction, ratio difference, ratio derivative and mean centering of ratio spectra methods. All of these methods were validated according to ICH guidelines where accuracy, precision, repeatability and robustness were found to be within the accepted limits. Advantages and limitations of each method are demonstrated and statistical comparison between the proposed methods was performed.
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Affiliation(s)
- Mahmoud M Sebaiy
- Medicinal Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt.
| | - Sobhy M El-Adl
- Medicinal Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Amr A Mattar
- Medicinal Chemistry Department, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo 11829, Egypt
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Marotta JC, Patel G, Carvalho M, Blakeney S. Clinical Efficacy of a Topical Compounded Formulation in Male Androgenetic Alopecia: Minoxidil 10%, Finasteride 0.1%, Biotin 0.2%, and Caffeine Citrate 0.05% Hydroalcoholic Solution. Int J Pharm Compd 2020; 24:69-76. [PMID: 32023218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Androgenetic alopecia is the most common form of hair loss. This condition affects both men and women causing significant psychological distress and a decrease in the quality of life. The objective of this study was to investigate the clinical efficacy and patient satisfaction of a topical compounded formulation (minoxidil 10%, finasteride 0.1%, biotin 0.2%, and caffeine citrate 0.05% hydroalcoholic solution) in male androgenetic alopecia patients. A total of five individual, prospective case studies were conducted in the private hair transplant practice of Dr. James C. Marotta. Patients were provided with the topical formulation and instructed to apply a measured 1-mL dose to the entire frontal, parietal, and occipital scalp, twice daily for 6 months. Patients visited the practice periodically (90 days, 120 days, and 180 days post-treatment) for clinical evaluation, photographic assessment, and measurement of their treatment satisfaction by the Men's Hair Growth Questionnaire. By the end of the study, at 180 days, the dermatologist-in-charge concluded that the topical treatment was successful for all five patients. Although moderate, the clinical improvements were visually noticeable as most patients had thicker, more voluminous hair; improved scalp coverage; and improved general hair appearance. These results were consistent with the photographic assessment, which demonstrated a global average increase of +1.05 in the patients' hair density. According to the patients' self-assessment, the topical compounded formulation was effective following 3 months and 6 months of continuous treatment. At 120 days, the patients' satisfaction was neutral or negative, which was likely due to negligible differences in the patients' hair growth and appearance in 90 days compared to 120 days. The results from this study suggest that the new hair-loss topical solution may be considered a safe and effective treatment option in male AGA patients.
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Affiliation(s)
| | - Gopesh Patel
- VLS Pharmacy & New Drug Loft, New York, New York
| | - Maria Carvalho
- Professional Compounding Centers of America, Houston, Texas.
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Yang Y, Sun X, Ni H, Du X, Chen F, Jiang Z, Li Q. Identification and Characterization of the Tyrosinase Inhibitory Activity of Caffeine from Camellia Pollen. J Agric Food Chem 2019; 67:12741-12751. [PMID: 31659899 DOI: 10.1021/acs.jafc.9b04929] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Tyrosinase inhibitors are important in cosmetic, medical, and food industries due to their regulation of melanin production. A tyrosinase inhibitor was purified from Camellia pollen using high-speed countercurrent chromatography and preparative high-performance liquid chromatography and was identified as caffeine by NMR and mass spectrometry. It showed strong mushroom tyrosinase inhibitory activity with an IC50 of 18.5 ± 2.31 μg/mL in a noncompetitive model. The caffeine did not interact with copper ions in the active center of the enzyme but could quench fluorescence intensity and change the secondary conformation of this tyrosinase. A molecular dynamics simulation showed that caffeine bound this tyrosinase via Lys379, Lys 376, Asp357, Glu356, Thr308, Gln307, Asp312, and Trp358, thus changing the binding sites of l-tyrosine and the loop conformation adjacent to the active center. In vitro cell model analysis revealed that caffeine exhibited significant inhibitory effects on both intracellular tyrosinase activity and melanin production of B16-F10 melanoma cells in a concentration-dependent manner. These comprehensive results suggest that caffeine is a strong tyrosinase inhibitor that has the potential to be developed as skin-whitening agents in the cosmetics and pharmaceutical industries or as antibrowning agents in the food industry.
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Affiliation(s)
- Yuanfan Yang
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
| | - Xu Sun
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
| | - Hui Ni
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
| | - Xiping Du
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
| | - Feng Chen
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
- Department of Food, Nutrition and Packaging Sciences , Clemson University , Clemson , South Carolina 29634 , United States
| | - Zedong Jiang
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
| | - Qingbiao Li
- College of Food and Biological Engineering , Jimei University , Xiamen , Fujian 361021 , China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering , Xiamen , Fujian 361021 , China
- Research Center of Food Biotechnology of Xiamen City , Xiamen , Fujian 361021 , China
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Paíga P, Ramos S, Jorge S, Silva JG, Delerue-Matos C. Monitoring survey of caffeine in surface waters (Lis River) and wastewaters located at Leiria Town in Portugal. Environ Sci Pollut Res Int 2019; 26:33440-33450. [PMID: 31522398 DOI: 10.1007/s11356-019-06168-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Investigation during 11-month period was performed to study the presence of caffeine in the Lis River in Leiria Town in Portugal, and a monitoring during 9-month period was realized to check the contribution of the human pollution of two wastewater treatment plants (WWTPs) that discharge their effluents to the studied river. The samples were collected in five sampling points along the river and in two influents and two effluents of the studied WWTPs. Caffeine was detected in all ninety-one collected samples. The caffeine concentration ranged from 25.3 to 321 ng/L in the river samples, from 112 to 1927 ng/L in the WWTP effluents, and from 9478 to 83,901 ng/L in the WWTP influents. The highest concentration in the river was detected in the two sampling points located after the effluent discharge points and reached 315 and 321 ng/L. Risk assessment was performed for three trophic levels using the risk quotient calculation and revealed that caffeine do not cause toxic effect on Daphnia magna and on fish but could be possibly toxic to algae. The results proved that caffeine can be an effective indicator of human-born pollution.
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Affiliation(s)
- Paula Paíga
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal
| | - Sandra Ramos
- CEAUL, Universidade de Lisboa, Portugal and LEMA, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal
| | - Sandra Jorge
- Águas do Centro Litoral, SA, Grupo Águas de Portugal, ETA da Boavista, Avenida Dr. Luís Albuquerque, 3030-410, Coimbra, Portugal
| | - Jaime Gabriel Silva
- Águas de Santo André, Cerca da Água, Rua dos Cravos, 7500-130, Vila Nova de Santo André, Portugal
- Departamento de Engenharia Civil, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Porto, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal.
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Alarie H, Roullin VG, Leclair G. Development of a safe and versatile suspension vehicle for pediatric use: Formulation development. Int J Pharm 2019; 569:118552. [PMID: 31376465 DOI: 10.1016/j.ijpharm.2019.118552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/28/2019] [Accepted: 07/19/2019] [Indexed: 11/19/2022]
Abstract
This project aimed to develop a suspension vehicle specifically designed for pediatric use. Excipients were selected according to their safety and recorded use in pediatrics. Two suspension vehicles were formulated at neutral and acidic pH. A few compositions were defined, and their physicochemical properties assessed and compared to readily-available commercial vehicles. As required for a multidose oral formulation, an antimicrobial effectiveness test was conducted according to the USP. Different microbial strains were inoculated individually in each formulation and their concentrations monitored for 28 days. Propionic acid proved to be an effective preservative against all tested strains at pH 4.5. All tested preservative failed the test at pH 7.5. The final version of the novel vehicle presented a pH of 4.5 and a viscosity of 85 cP at 25 °C. A clear shear-thinning behaviour could be observed. These properties warranted an adequate physical stability and resuspendability, when tested with prednisolone and acetaminophen tablets. A slight reduction of the viscosity was reported when stored at room temperature, but the pH remained constant for 180 days in refrigerated conditions and at room temperature. The final result is a ready-to-use compounding vehicle, containing minimal excipients, safe for children's use and stable for 6 months.
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Affiliation(s)
- Hugo Alarie
- Platform of Biopharmacy, Faculty of Pharmacy, Université de Montréal, Montréal, Canada
| | - V Gaëlle Roullin
- Platform of Biopharmacy, Faculty of Pharmacy, Université de Montréal, Montréal, Canada.
| | - Grégoire Leclair
- Platform of Biopharmacy, Faculty of Pharmacy, Université de Montréal, Montréal, Canada.
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50
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Song Y, Zhou Y, Yan XT, Bi JB, Qiu X, Bian Y, Wang KF, Zhang Y, Feng XS. Pharmacokinetics and Tissue Distribution of Alnustone in Rats after Intravenous Administration by Liquid Chromatography-Mass Spectrometry. Molecules 2019; 24:molecules24173183. [PMID: 31480657 PMCID: PMC6749364 DOI: 10.3390/molecules24173183] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 11/16/2022] Open
Abstract
Alnustone, a nonphenolic diarylheptanoid, first isolated from Alnus pendula (Betulaceae), has recently received a great deal of attention due to its various beneficial pharmacological effects. However, its pharmacokinetic profile in vivo remains unclear. The purpose of this study is to establish a fast and sensitive quantification method of alnustone using liquid chromatography tandem mass spectrometry (LC-MS/MS) and evaluate the pharmacokinetic and tissue distribution profiles of alnustone in rats. The sample was precipitated with acetonitrile with 0.5% formic acid and separated on BEH C18 Column. The mobile phase was composed of 0.1% formic acid in water and methanol at a flow rate of 0.3 mL/min. Alnustone and the internal standard (caffeine) were quantitatively monitored with precursor-to-product ion transitions of m/z 262.9→105.2 and m/z 195.2→138.0, respectively. The calibration curve for alnustone was linear from 1 to 2000 ng/mL. The intra- and inter-day assay precision (RSD) ranged from 1.1-9.0 % to 3.3-8.6%, respectively and the intra- and inter-day assay accuracy (RE) was between -8.2-9.7% and -10.3-9.9%, respectively. The validated method was successfully applied to the pharmacokinetic studies of alnustone in rats. After single-dose intravenous administration of alnustone (5 mg/kg), the mean peak plasma concentration (Cmax) value was 7066.36 ± 820.62 ng/mL, and the mean area under the concentration-time curve (AUC0-t) value was 6009.79 ± 567.30 ng/mL∙h. Our results demonstrated that the residence time of alnustone in vivo was not long and it eliminated quickly from the rat plasma. Meanwhile, the drug is mainly distributed in tissues with large blood flow, and the lung and liver might be the target organs for alnustone efficacy. The study will provide information for further application of alnustone.
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Affiliation(s)
- Yang Song
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Yu Zhou
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xiao-Ting Yan
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Jing-Bo Bi
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Xin Qiu
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Yu Bian
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Ke-Fei Wang
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Yuan Zhang
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang 110122, China.
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