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Zhou F, Xue Q, Duan X. A novel ultrasonic-electric-based microsystem for the investigation of mechanical aging on lipid membranes. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083663 DOI: 10.1109/embc40787.2023.10340884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Aging cells experience a gradual degeneration of their chemical and physical characteristics, resulting in the declining body functions that are commonly observed in old age. In this paper, we propose a novel microsystem that utilizes acoustics and electricity to investigate the effects of mechanical cyclic loading on cellular aging. Our study is the first to examine how mechanical loading influences the physicochemical characteristics of lipid bilayer at the subcellular level. By providing a new method for understanding the mechanism of cellular aging and aging-related diseases, our microsystem has significant implications for the development of treatments and therapies.Clinical Relevance- This ultrasonic-electric-based microsystem, as an in vitro model with sensitive quantitative capabilities, could have significant clinical implications in terms of understanding cellular responses to mechanical forces, elucidating the pathogenesis of aging-related diseases, and developing therapeutic strategies.
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Adin SN, Gupta I, Aqil M, Mujeeb M. Application of QbD based approach in development and validation of RP-HPLC method for simultaneous estimation of methotrexate and baicalin in dual-drug-loaded liposomes. Biomed Chromatogr 2023; 37:e5581. [PMID: 36609805 DOI: 10.1002/bmc.5581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/13/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
The present study delineates the development of a novel, rugged and sensitive stability-indicating risk-based HPLC method for the concurrent estimation of methotrexate (MTX) and baicalin (BCL) in dual-drug-loaded-nanopharmaceuticals based on an analytical quality-by-design approach. Preliminary screening trials along with systemic risk analysis were performed, endeavouring to explicate the critical method attributes, namely pH, percentage of orthophosphoric acid and percentage of acetonitrile, that influence the critical quality attributes. Box-Behnken design was utilized for the optimization of the tailing factor as the response for MTX and BCL in a short run time. The chromatographic conditions were optimized by performing 17 experimental runs using design expert software. The chromatographic conditions were selected after the analysis of the optimized zone within the confines of the design space: water:acetonitrile adjusted to a pH of 3.0 with 0.05% orthophosphoric acid (60:40, %v/v) was the mobile phase, the flow rate was 1.0 ml/min and an analytical C18 column was used at an isobestic wavelength of 282 nm. Furthermore, the optimized method was validated in accordance with the International Council for Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use guidelines and was found to be within the prescribed limits. Therefore, the developed reversed-phase-high-performance liquid chromatography method has a high degree of practical utility for synchronous detection of MTX and BCL in pharmaceutical nano-dosage forms such as protein-based nanoparticles, nanocrystals, polymeric nanoparticles and metallic nanoparticles in in vivo and in vitro studies.
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Affiliation(s)
- Syeda Nashvia Adin
- Phytomedicine Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Isha Gupta
- Phytomedicine Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Mohd Aqil
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Mohd Mujeeb
- Phytomedicine Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
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Holanda FH, Ribeiro AN, Sánchez-Ortiz BL, de Souza GC, Borges SF, Ferreira AM, Florentino AC, Yoshioka SA, Moraes LS, Carvalho JCT, Ferreira IM. Anti-inflammatory potential of baicalein combined with silk fibroin protein in a zebrafish model (Danio rerio). Biotechnol Lett 2023; 45:235-253. [PMID: 36550336 PMCID: PMC9778464 DOI: 10.1007/s10529-022-03334-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/19/2022] [Accepted: 11/17/2022] [Indexed: 12/24/2022]
Abstract
Baicalein (BA) is a flavonoid with wide-ranging pharmacological activity. However, its biological evaluation is hampered by its low solubility in aqueous medium, making forms of incorporation that improve its solubility necessary. In the present study, BA was combined with a solution of silk fibroin protein (SF), a biomaterial used too as a drug carrier, to evaluate the anti-inflammatory potential of this combination, in vivo, in an experimental model, zebrafish (Danio rerio). Baicalein-silk fibroin (BASF) improved the DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) free radical scavenging rate (95%) in comparison with BA in solution. The acute toxicity study and histopathological analysis in zebrafish showed that BASF has low cytotoxic potential, except for the maxim dose of 2000 mg/kg. The use of BA in combination with SF enhanced the anti-inflammatory effect of flavonoids by inducing inflammatory peritoneal edema through carrageenan and achieved 77.6% inhibition of abdominal edema at a dose of 75 mg/kg. The results showed that the BASF, significantly increases the bioavailability and therapeutic effect of flavonoids and several results observed in this study may help in the development of new drugs.
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Affiliation(s)
- Fabrício H. Holanda
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Arlefe N. Ribeiro
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Brenda L. Sánchez-Ortiz
- Drug Research Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Gisele C. de Souza
- Drug Research Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Swanny F. Borges
- Drug Research Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Adriana M. Ferreira
- Drug Research Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Alexandro C. Florentino
- Laboratório de Ictio e Genotoxidade, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Sérgio A. Yoshioka
- Biochemistry and Biomaterials Laboratory, Institute of Chemistry of São Carlos, University of São Paulo, Universidade de São Paulo, São Carlos, SP Brazil
| | - Lienne S. Moraes
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - José Carlos T. Carvalho
- Drug Research Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
| | - Irlon M. Ferreira
- Biocatalysis and Applied Organic Synthesis Laboratory, Federal University of Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP Brazil
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4
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Guo YY, Li WJ, Guo PY, Han XR, Deng ZR, Zhang S, Cai ZF. One facile fluorescence strategy for sensitive determination of baicalein using trypsin-templated copper nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120689. [PMID: 34894569 DOI: 10.1016/j.saa.2021.120689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/23/2021] [Accepted: 11/27/2021] [Indexed: 06/14/2023]
Abstract
Herein, we established a fluorescent detection platform for baicalein (Bai) based on copper nanoclusters, which were prepared by using copper sulfate as the precursor, trypsin (Tryp) as the template and hydrazine hydrate as the reducing agent. The entire preparation and testing process were rapid, facile and green. Many characterization methods, such as UV-vis absorption spectroscopy, fluorescence spectroscopy, fourier transform infrared spectroscopy (FT-IR), fluorescence lifetime, transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS), were applied for the analysis of trypsin-templated copper nanoclusters (Cu NCs@Tryp). The Cu NCs@Tryp released green fluorescence at maximum emission wavelength of 457 nm under maximum excitation wavelength of 377 nm. More importantly, the fluorescence of Cu NCs@Tryp was efficiently quenched by Bai. According to this phenomenon, a facile, rapid and selective turn-off fluorescence probe for Bai sensing was developed. Under the optimized testing conditions, the ln(F0/F) value and concentration of Bai displayed excellent linear relationship changing from 0.5 to 60 μM (R2 = 0.9969), and the detection limit was 0.078 μM. Furthermore, the Cu NCs@Tryp has been successfully employed to measure the amount of Bai in bovine serum samples with satisfactory recoveries.
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Affiliation(s)
- Yu-Yu Guo
- College of Arts, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
| | - Wen-Jing Li
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Peng-Yu Guo
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Xin-Rui Han
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Zi-Rong Deng
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Shen Zhang
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
| | - Zhi-Feng Cai
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, China
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Labbé E, Buriez O. Electrode‐supported and free‐standing bilayer lipid membranes: Formation and uses in molecular electrochemistry. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Eric Labbé
- PASTEUR Département de Chimie Ecole Normale Supérieure PSL University Sorbonne Université CNRS Paris 75005 France
| | - Olivier Buriez
- PASTEUR Département de Chimie Ecole Normale Supérieure PSL University Sorbonne Université CNRS Paris 75005 France
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Souza JCP, Macedo LJA, Hassan A, Sedenho GC, Modenez IA, Crespilho FN. In Situ
and
Operando
Techniques for Investigating Electron Transfer in Biological Systems. ChemElectroChem 2020. [DOI: 10.1002/celc.202001327] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- João C. P. Souza
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
- Campus Rio Verde Goiano Federal Institute of Education, Science and Technology 75901-970 Rio Verde Goiás Brazil
| | - Lucyano J. A. Macedo
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
| | - Ayaz Hassan
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
| | - Graziela C. Sedenho
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
| | - Iago A. Modenez
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
| | - Frank N. Crespilho
- São Carlos Institute of Chemistry University of São Paulo 13560-970 São Carlos São Paulo Brazil
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Zhang Y, Li Q, Dong M, Han X. Effect of cholesterol on the fluidity of supported lipid bilayers. Colloids Surf B Biointerfaces 2020; 196:111353. [DOI: 10.1016/j.colsurfb.2020.111353] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 01/12/2023]
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8
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Xin X, Zhang M, Li XF, Zhao G. Biocatalytic Synthesis of Lipophilic Baicalin Derivatives as Antimicrobial Agents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11684-11693. [PMID: 31564105 DOI: 10.1021/acs.jafc.9b04667] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Enzymatic acylation is commonly used to increase the lipophilicity of flavonoids. However, the absence of primary hydroxyl groups makes it challenging to acylate baicalin using traditional acylation methods. In this study, an enzymatic esterification strategy was developed to introduce fatty-acid chains into baicalin at its carboxyl group, hence successfully synthesizing a new series of baicalin ester derivatives in nonaqueous media. Under the optimal reaction conditions, up to 95% conversion of baicalin was achieved. Antimicrobial evaluation of the baicalin ester derivatives indicated a corresponding increase to that of C log P values, with a cutoff effect at C log P = 5.2. Baicalin ester derivatives with C log P values of 4.9-5.2 exhibited the most potent antimicrobial activity. Interestingly, the introduction of medium-length fatty alcohol chains not only increased lipophilicity but also endowed them with membrane-disrupting properties. This study, therefore, provides an understanding of the esterification of flavonoid glycosides and a prospective application of the ester derivatives.
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Zhang J, Nan D, Pan S, Liu H, Yang H, Hu X. N,S co-doped carbon dots as a dual-functional fluorescent sensor for sensitive detection of baicalein and temperature. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 221:117161. [PMID: 31158757 DOI: 10.1016/j.saa.2019.117161] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/23/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
In this work, nitrogen and sulfur dual-doped CDs (N,S-CDs) were prepared via a facile one-pot hydrothermal method from citric acid and N-acetyl-L-cysteine with a high quantum yield (QY) of 49%. As-fabricated N,S-CDs had a size around 2.5 nm and exhibited excitation-independent emission and excellent luminescent properties. The fluorescent sensor based on the N,S-CDs showed a highly sensitive detection of baicalein with a detection limit (LOD) of 0.21 μmol L-1 in the linear range from 0.69 to 70.0 μmol L-1. The fluorescence of the N,S-CDs could be effectively quenched by baicalein based on static quenching. In addition, the temperature sensor based on the synthesized N,S-CDs showed a good linear relationship between temperature and fluorescence (FL) intensity with a temperature range from 5 °C to 75 °C. Furthermore, the synthesized N,S-CDs were successfully applied to the measurement of baicalein in real samples. In a word, the N,S-CDs had great potential to be worked as fluorescence sensors to monitor the concentration of baicalein and temperature.
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Affiliation(s)
- Jun Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Danyang Nan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Shuang Pan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Hui Liu
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Huan Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoli Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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Gut microbial transformation, a potential improving factor in the therapeutic activities of four groups of natural compounds isolated from herbal medicines. Fitoterapia 2019; 138:104293. [PMID: 31398447 DOI: 10.1016/j.fitote.2019.104293] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/04/2019] [Accepted: 08/05/2019] [Indexed: 12/19/2022]
Abstract
Herbal medicines (HMs) have attracted widespread attention because of their significant contributions to the prevention and treatment of many human diseases. Recently, gut microbiota has become an important frontier to understand the therapeutic mechanisms of medicines. Gut microbiota-mediated transformation is a microbial metabolic form after oral administrations of HMs compounds. A great number of studies showed that gut microbiota could transform some HMs compounds by the variation of chemical structures into several active metabolites, which exerted better bioavailabilities and therapeutic activities than their parent compounds. Among these HMs compounds, alkaloids, flavonoids, polyphenols and terpenoids were the representative ones. However, there is no systemic review focusing on the potential improved therapeutic activities of these natural compounds caused by gut microbial transformation. Here, this review summarizes the therapeutic activities that are more potent in microbial transformed metabolites than in their parent compounds (alkaloids, flavonoids, polyphenols and terpenoids) from HMs. We hope this review will be conducive to deepening the understanding of the relationship between gut microbial transformation and therapeutic activities of HMs compounds.
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Preparation Methods for Phospholipid Vesicle Arrays and Their Applications in Biological Analysis. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61179-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Gál M, Sokolová R, Naumowicz M, Híveš J, Krahulec J. Electrochemical and AFM study of the interaction of recombinant human cathelicidin LL-37 with various supported bilayer lipid membranes. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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13
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Wang X, Li X, Chen W, Wang R, Bian W, Choi MMF. Phosphorus doped graphitic carbon nitride nanosheets as fluorescence probe for the detection of baicalein. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 198:1-6. [PMID: 29501001 DOI: 10.1016/j.saa.2018.02.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 02/03/2018] [Accepted: 02/22/2018] [Indexed: 05/25/2023]
Abstract
Phosphorus doped graphitic carbon nitride (P-g-C3N4) nanosheets were synthesized by calcination. P-g-C3N4 nanosheets were characterized by XRD, XPS, TEM, fluorescence, ultraviolet-visible absorption and Fourier transform infrared spectroscopy. The fluorescence of the P-g-C3N4 nanosheets was gradually quenched with the increase in the concentration of baicalein at room temperature. The proposed probe was used for the determination of baicalein in the concentration 2.0-30μM with a detection limit of 53nM. The quenching mechanism was discussed. The P-g-C3N4 nanosheets have been successfully applied for effective and selective detection of baicalein in human urine samples and blood samples.
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Affiliation(s)
- Xuan Wang
- College of Pharmacy, Shanxi Medical University, Taiyuan 030001, PR China
| | - Xuebing Li
- School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Wenfang Chen
- School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Rulin Wang
- School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, PR China
| | - Wei Bian
- School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, PR China.
| | - Martin M F Choi
- Bristol Chinese Christian Church, Tyndale Baptist Church, 137-139 Whiteladies Road, Bristol BS8 2QG, United Kingdom
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Zhai C, Zhang P, Peng P, Hou B, Li L. Hydrogen bonding and π-π stacking in nicotinamide/H 2O mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 184:294-298. [PMID: 28525864 DOI: 10.1016/j.saa.2017.05.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/05/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
The interactions between nicotinamide (NA) and H2O were studied using UV-visible spectra (UV-Vis), cyclic voltammetry (CV), nuclear magnetic resonance (NMR), density functional theory (DFT) and atoms in molecules (AIM) analysis. According to the changes of the UV-Vis spectra and the oxidation and reduction potentials in cyclic voltammograms of NA in aqueous solution, it was found that hydrogen bonding occurred between NA and H2O molecules. Quantum chemistry calculations and AIM analysis further confirmed the existence of hydrogen bonding between H2O molecules and the amide group, the nitrogen atom, and hydrogen atoms on the pyridine ring of NA molecules. In addition, the NMR results demonstrated that the π-π stacking between NA pyridine rings could be formed at higher concentrations.
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Affiliation(s)
- Cuiping Zhai
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China.
| | - Ping Zhang
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Peng Peng
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Bingbing Hou
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
| | - Lina Li
- Institute of Fine Chemical and Engineering, Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, China
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15
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On Electrochemical Methods for Determination of Protein-Lipid Interaction. Methods Mol Biol 2017. [PMID: 28660589 DOI: 10.1007/978-1-4939-6996-8_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Amyloid-β (Aβ) peptides are important and reliable molecular biomarkers for the diagnosis and prognosis of Alzheimer's disease. Aggregation and fibrillization of Aβ peptides on ganglioside GM1 (GM1)-containing lipid membranes is considered a cause of neurodegenerative disease. Because GM1 is abundant in the central nervous system and plays a key role in the aggregation of Aβ, the interaction of Aβ with supported planar lipid bilayers (SPBs) containing GM1 is of great significance. We have prepared SPBs containing GM1 in order to study the electrochemical characteristics of GM1/sphingomyelin/cholesterol SPBs and their interaction with Aβ(1-40) by cyclic voltammetry and electrochemical impedance spectroscopy (EIS), which proves that electrochemical is a promising method for analyzing the interaction between peptides and lipid membranes.
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Zhang H, Wang T, Qiu Y, Fu F, Yu Y. Electrochemical behavior and determination of baicalin on a glassy carbon electrode modified with molybdenum disulfide nano-sheets. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.06.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Zhou Y, Yang ZY, Tang RC. Bioactive and UV protective silk materials containing baicalin - The multifunctional plant extract from Scutellaria baicalensis Georgi. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:336-344. [PMID: 27287129 DOI: 10.1016/j.msec.2016.05.063] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 05/02/2016] [Accepted: 05/15/2016] [Indexed: 12/23/2022]
Abstract
There has been a phenomenal increase in the research and development of new health and hygiene-related textile products. This work reports a novel approach to develop antibacterial, antioxidant and UV-protective silk using an adsorption technique of baicalin (a bioactive ingredient from the root of Scutellaria baicalensis Georgi). Baicalin displayed high adsorption capability at pH2.75, contributing to the sufficient functionalities on silk. The equilibrium adsorption research showed that the Langmuir isotherm was able to describe the behavior of baicalin, indicating the electrostatic interactions between the ionized carboxyl groups in baicalin and the positively charged amino groups in silk. The treated silk with 2% owf (on the weight of fiber) baicalin exhibited excellent antioxidant activity, high antibacterial activities against Escherichia coli and Staphylococcus aureus, and very good ultraviolet protection ability comparable to that of the commercial benzotriazole ultraviolet absorber. The baicalin treatment had no obvious impact on the functional groups, crystal structure and surface morphology of silk. The functionalities of the treated silk obviously declined after first laundering cycle and slowly decreased in the following washing cycles. Encouraging results demonstrate that the baicalin-functionalized silk is a promising material for protective clothing and medical textiles.
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Affiliation(s)
- Yuyang Zhou
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China
| | - Zhi-Yi Yang
- Lushan College, Guangxi University of Science and Technology, Liuzhou 545000, China
| | - Ren-Cheng Tang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China.
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The Ginkgo biloba Extract Reverses the Renal Effects of Titanium Dioxide Nanoparticles in Adult Male Rats. Biochem Res Int 2016; 2016:5781579. [PMID: 27042354 PMCID: PMC4794584 DOI: 10.1155/2016/5781579] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 02/08/2016] [Indexed: 01/18/2023] Open
Abstract
The Ginkgo biloba extract (GbE) is a commercial product used as a nutraceutic herbal remedy in Europe and US. It contains 27% of the polyphenols isorhamnetin, kaempferol, and quercetin, as antioxidants. We used male adult Wistar rats (200-300 g), divided into four groups: control group (treated with 5.0 mg/kg of sodium chloride, intravenous), titanium dioxide nanoparticles (TiO2-NPs) group (5.0 mg/kg, intravenous), GbE group (10 mg/kg, intraperitoneal), and GbE + TiO2-NPs group (treated 24 h before with 10 mg/kg of GbE, intraperitoneal), followed, 24 h later, by 5.0 mg/kg of TiO2-NPs intravenously. The statistical analysis was performed using Student's t-test for grouped data with ANOVA posttest. The GbE protected renal cells against the effects of TiO2-NPs because it reversed the increased activity of γ-glutamyltranspeptidase and the enzymatic activity of dipeptidylaminopeptidase IV at all times tested (0-5, 5-24, 24-48, and 48-72 h). Also it reversed the glucosuria, hypernatriuria, and urine osmolarity at three times tested (5-24, 24-48, and 48-72). Thus, we conclude that GbE has a beneficial activity in the cytoplasmic membranes of brush border cells on the renal tubules, against the adverse effects that can be produced by some xenobiotics in this case the TiO2-NPs, in experimental rats.
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Tacheva B, Georgieva R, Karabaliev M. Interactions of the spin-labeled chloroethylnitrosourea SLCNUgly with electrode-supported lipid films. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jahnke JP, Bazan GC, Sumner JJ. Effect of Modified Phospholipid Bilayers on the Electrochemical Activity of a Membrane-Spanning Conjugated Oligoelectrolyte. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11613-11620. [PMID: 26422050 DOI: 10.1021/acs.langmuir.5b03093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The incorporation and electrochemical activity of a conjugated oligoelectrolyte (COE) in model phospholipid bilayers have been characterized using cyclic voltammetry and UV-vis absorption measurements. Several other modifiers were also incorporated into the phospholipid membranes to alter properties such as charge and alkyl chain disorder. Using potassium ferricyanide to measure charge transport, it was observed that bilayers that contained cholic acid, a negatively charged additive that also promotes alkyl chain disorder, had higher COE uptake and charge permeability than unmodified bilayers. In contrast, when the positively charged choline was incorporated, charge permeability decreased and COE uptake was similar to that of unmodified bilayers. The incorporation of cholesterol at low concentrations within the phospholipid membranes was shown to enhance the COE's effectiveness at increasing membrane charge permeability without increasing the COE concentration in the bilayer. Higher concentrations of cholesterol reduce membrane fluidity and membrane charge permeability. Collectively, these results demonstrate that changes in phospholipid membrane charge permeability upon COE incorporation depend not only on the concentration in the membrane but also on interactions with the phospholipid bilayer and other additives present in the membranes. This approach of manipulating the properties of phospholipid membranes to understand COE interactions is applicable to understanding the behavior of a wide range of molecules that impart useful properties to phospholipid membranes.
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Affiliation(s)
- Justin P Jahnke
- U.S. Army Research Laboratory Sensors & Electron Devices Directorate, Adelphi, Maryland 20783, United States
| | - Guillermo C Bazan
- Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93106, United States
| | - James J Sumner
- U.S. Army Research Laboratory Sensors & Electron Devices Directorate, Adelphi, Maryland 20783, United States
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Selvaraj S, Krishnaswamy S, Devashya V, Sethuraman S, Krishnan UM. Influence of membrane lipid composition on flavonoid-membrane interactions: Implications on their biological activity. Prog Lipid Res 2014; 58:1-13. [PMID: 25479162 DOI: 10.1016/j.plipres.2014.11.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 10/29/2014] [Accepted: 11/24/2014] [Indexed: 01/22/2023]
Abstract
The membrane interactions and localization of flavonoids play a vital role in altering membrane-mediated cell signaling cascades as well as influence the pharmacological activities such as anti-tumour, anti-microbial and anti-oxidant properties of flavonoids. Various techniques have been used to investigate the membrane interaction of flavonoids. These include partition coefficient, fluorescence anisotropy, differential scanning calorimetry, NMR spectroscopy, electrophysiological methods and molecular dynamics simulations. Each technique will provide specific information about either alteration of membrane fluidity or localization of flavonoids within the lipid bilayer. Apart from the diverse techniques employed, the concentrations of flavonoids and lipid membrane composition employed in various studies reported in literature also are different and together these variables contribute to diverse findings that sometimes contradict each other. This review highlights different techniques employed to investigate the membrane interaction of flavonoids with special emphasis on erythrocyte model membrane systems and their significance in understanding the nature and extent of flavonoid-membrane interactions. We also attempt to correlate the membrane localization and alteration in membrane fluidity with the biological activities of flavonoids such as anti-oxidant, anti-cancer and anti-microbial properties.
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Affiliation(s)
- Stalin Selvaraj
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613 401, India
| | - Sridharan Krishnaswamy
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613 401, India
| | - Venkappayya Devashya
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613 401, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613 401, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613 401, India.
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Tarahovsky YS, Kim YA, Yagolnik EA, Muzafarov EN. Flavonoid-membrane interactions: involvement of flavonoid-metal complexes in raft signaling. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:1235-46. [PMID: 24472512 DOI: 10.1016/j.bbamem.2014.01.021] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 01/13/2014] [Accepted: 01/17/2014] [Indexed: 02/07/2023]
Abstract
Flavonoids are polyphenolic compounds produced by plants and delivered to the human body through food. Although the epidemiological analyses of large human populations did not reveal a simple correlation between flavonoid consumption and health, laboratory investigations and clinical trials clearly demonstrate the effectiveness of flavonoids in the prevention of cardiovascular, carcinogenic, neurodegenerative and immune diseases, as well as other diseases. At present, the abilities of flavonoids in the regulation of cell metabolism, gene expression, and protection against oxidative stress are well-known, although certain biophysical aspects of their functioning are not yet clear. Most flavonoids are poorly soluble in water and, similar to lipophilic compounds, have a tendency to accumulate in biological membranes, particularly in lipid rafts, where they can interact with different receptors and signal transducers and influence their functioning through modulation of the lipid-phase behavior. In this study, we discuss the enhancement in the lipophilicity and antioxidative activity of flavonoids after their complexation with transient metal cations. We hypothesize that flavonoid-metal complexes are involved in the formation of molecular assemblies due to the facilitation of membrane adhesion and fusion, protein-protein and protein-membrane binding, and other processes responsible for the regulation of cell metabolism and protection against environmental hazards.
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Affiliation(s)
- Yury S Tarahovsky
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region 142290, Russia.
| | - Yuri A Kim
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290, Russia
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