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Bilkay M, Yazıcı S, Erkmen C, Celik I, Satana Kara HE. Unraveling the interaction mechanism between orphan drug Nitisinone and bovine serum albumin through spectroscopic and in silico approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124818. [PMID: 39029202 DOI: 10.1016/j.saa.2024.124818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 07/09/2024] [Accepted: 07/13/2024] [Indexed: 07/21/2024]
Abstract
The interaction between Nitisinone (NTBC) and bovine serum albumin (BSA) as the transport protein in a circulating system was investigated for the first time utilizing various analytical (UV-Vis spectrophotometry, fluorescence spectroscopy, dynamic light scattering, and differential scanning calorimetry) and computational (molecular docking and molecular dynamics simulations) methods. The BSA fluorescence intensity was quenched upon interaction with NTBC, and the quenching mechanism was observed as static. The interaction between NTBC and BSA was examined at 288 K, 298 K, and 308 K where the binding constants were found to be 1.44 × 105 ± 0.22 M-1, 5.18 × 104 ± 0.20 M-1, and 3.02 × 104 ± 0.22 M-1 respectively, suggesting an intermediate binding affinity between NTBC and BSA. Changes in the microenvironment surrounding tryptophan and tyrosine residues of BSA were elucidated using 3-D fluorescence spectroscopy. Thermodynamic studies revealed the calculated values of ΔH = - 54.34 ± 5 kJ/mol and ΔS = - 0.0908 ± 0.24 kJ/mol K-1, indicating the involvement of van der Waals forces and hydrogen bonds in the interaction between NTBC and BSA. Moreover, the interaction's spontaneous nature was evidenced by negative ΔG values across all temperatures. Using dynamic light scattering, it was observed that higher NTBC concentrations led to a gradual rise in hydrodynamic diameter and notable aggregation of the NTBC-BSA complex. Moreover, changing signal values and shifted peaks of BSA, NTBC, and complex in differential scanning calorimetry curves, meant there were molecular interactions between the NTBC and BSA. In silico approaches also elucidated how NTBC binds to active sites on BSA, further supporting other findings. Moreover, molecular docking studies offer a more profound insight into the changing dynamics of hydrophobic, hydrogen, and halogen bonding involved in stabilizing the NTBC-BSA complex.
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Affiliation(s)
- Mehmetcan Bilkay
- Gazi University, Faculty of Pharmacy, Department of Analytical Chemistry, 06330 Ankara, Türkiye
| | - Sule Yazıcı
- Gazi University, Faculty of Pharmacy, Department of Analytical Chemistry, 06330 Ankara, Türkiye
| | - Cem Erkmen
- Istanbul Aydın University, Faculty of Pharmacy, Department of Analytical Chemistry, Istanbul 34295, Türkiye.
| | - Ismail Celik
- Erciyes University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Kayseri 38039, Türkiye
| | - Hayriye Eda Satana Kara
- Gazi University, Faculty of Pharmacy, Department of Analytical Chemistry, 06330 Ankara, Türkiye
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Žiberna MB, Grabnar PA, Gašperlin M, Matjaž MG. Lyophilised protein formulations as a patient-centric dosage form: A contribution toward sustainability paradigm. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2024; 74:289-300. [PMID: 38815206 DOI: 10.2478/acph-2024-0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/08/2024] [Indexed: 06/01/2024]
Abstract
At present, society has embraced the fact apropos population aging and climate changes, that demand, amongst others, innovative pharmaceutical technologies, emphasising the development of patient-specific delivery systems and thus the provision of efficient and sustainable drugs. Protein drugs for subcutaneous administration, by allowing less frequent application, represent one of the most important parts of the pharmaceutical field, but their development is inevitably faced with obstacles in providing protein stability and suitable formulation viscosity. To gain further knowledge and fill the gaps in the already constructed data platform for the development of monoclonal antibody formulations, we designed a study that examines small model proteins, i.e., bovine serum albumin. The main aim of the presented work is to evaluate the effect of protein concentrations on critical quality attributes of both, pre-lyophilised liquid formulations, and lyophilised products. Through the study, the hypothesis that increasing protein concentration leads to higher viscosity and higher reconstitution time without affecting the stability of the protein was confirmed. The most important finding is that sucrose plays a key role in the lyophilisation of investigated protein, nevertheless, it can be predicted that, to ensure the beneficial effect of mannitol, its amount has to prevail over the amount of sucrose.
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Affiliation(s)
- Maja Bjelošević Žiberna
- 1University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Technology, 1000 Ljubljana, Slovenia
| | - Pegi Ahlin Grabnar
- 1University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Technology, 1000 Ljubljana, Slovenia
| | - Mirjana Gašperlin
- 1University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Technology, 1000 Ljubljana, Slovenia
| | - Mirjam Gosenca Matjaž
- 1University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Technology, 1000 Ljubljana, Slovenia
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Li X, Gao X, Fu B, Lu C, Han H, Zhou Q, Xu H. Study on the toxicity prediction model ofacetolactate synthase inhibitor herbicides based on human serum albumin and superoxide dismutase binding information. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123789. [PMID: 38154301 DOI: 10.1016/j.saa.2023.123789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 12/30/2023]
Abstract
Toxicity significantly influences the successful development of drugs. Based on the toxicity prediction method (carrier protein binding information-toxicity relationship) previously established by the our group, this paper introduces information on the interaction between pesticides and environmental markers (SOD) into the model for the first time, so that the toxicity prediction model can not only predict the toxicity of pesticides to humans and animals, but also predict the toxicity of pesticides to the environment. Firstly, the interaction of acetolactate synthase inhibitor herbicides (ALS inhibitor herbicides) with human serum albumin (HSA) and superoxide dismutase (SOD) was investigated systematically from theory combined with experiments by spectroscopy methods and molecular docking, and important fluorescence parameters were obtained. Then, the fluorescence parameters, pesticides acute toxicity LD50 and structural splitting information were used to construct predictive modeling of ALS inhibitor herbicides based on the carrier protein binding information (R2 = 0.977) and the predictive modeling of drug acute toxicity based on carrier protein binding information and conformational relationship (R2 = 0.991), which had effectively predicted pesticides toxicity in humans and animals. To predict potential environmental toxicity, the predictive modeling of drug acute toxicity based on superoxide dismutase binding information was established (R2 = 0.883) by ALS inhibitor herbicides-SOD binding information, which has a good predictive ability in the potential toxicity of pesticides to the environment. This study lays the foundation for developing low toxicity pesticides.
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Affiliation(s)
- Xiangfen Li
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Heilongjiang University, Harbin 150080, China; Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Xiaojie Gao
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Bowen Fu
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Chang Lu
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - He Han
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Qin Zhou
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China.
| | - Hongliang Xu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Heilongjiang University, Harbin 150080, China; Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China.
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4
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Lopez-Cavestany M, Wright OA, Cassidy AM, Carter AT, King MR. Dual Affinity Nanoparticles for the Transport of Therapeutics from Carrier Cells to Target Cells under Physiological Flow Conditions. ACS OMEGA 2023; 8:42748-42761. [PMID: 38024679 PMCID: PMC10652824 DOI: 10.1021/acsomega.3c05605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/06/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023]
Abstract
In this study, a novel two-stage nanoparticle delivery platform was developed based on the dual functionalization of a liposome with moieties that have fundamentally different strengths of adhesion and binding kinetics. The essential concept of this system is that the nanoparticles are designed to loosely bind to the carrier cell until they come into contact with the target cell, to which they bind with greater strength. This allows the nanoparticle to be transferred from one cell to another, circulating for longer periods of time in the blood and delivering the therapeutic agent to the target circulating tumor cell. Liposomes were prepared using the lipid cake and extrusion technique, then functionalized with E-selectin (ES), anti-cell surface vimentin antibody fragments, and TRAIL via click chemistry. The binding of dual affinity (DA) liposomes was confirmed with the neutrophil-like cell line PLB985, the colorectal cancer cell line HCT116, and healthy granulocytes isolated from peripheral whole blood under physiologically relevant fluid shear stress (FSS) in a cone-and-plate viscometer. Transfer of the DA liposomes from PLB985 to HCT116 cells under FSS was greater compared to all of the control liposome formulations. Additionally, DA liposomes demonstrated enhanced apoptotic effects on HCT116 cells in whole blood under FSS, surpassing the efficacy of the ES/TRAIL liposomes previously developed by the King Lab.
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Affiliation(s)
- Maria Lopez-Cavestany
- Department of Biomedical
Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Olivia A. Wright
- Department of Biomedical
Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Ava M. Cassidy
- Department of Biomedical
Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Alexandria T. Carter
- Department of Biomedical
Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Michael R. King
- Department of Biomedical
Engineering, Vanderbilt University, Nashville, Tennessee 37235, United States
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Sebők-Nagy K, Kóta Z, Kincses A, Fazekas ÁF, Dér A, László Z, Páli T. Spin-Label Electron Paramagnetic Resonance Spectroscopy Reveals Effects of Wastewater Filter Membrane Coated with Titanium Dioxide Nanoparticles on Bovine Serum Albumin. Molecules 2023; 28:6750. [PMID: 37836593 PMCID: PMC10574081 DOI: 10.3390/molecules28196750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
The accumulation of proteins in filter membranes limits the efficiency of filtering technologies for cleaning wastewater. Efforts are ongoing to coat commercial filters with different materials (such as titanium dioxide, TiO2) to reduce the fouling of the membrane. Beyond monitoring the desired effect of the retention of biomolecules, it is necessary to understand what the biophysical changes are in water-soluble proteins caused by their interaction with the new coated filter membranes, an aspect that has received little attention so far. Using spin-label electron paramagnetic resonance (EPR), aided with native fluorescence spectroscopy and dynamic light scattering (DLS), here, we report the changes in the structure and dynamics of bovine serum albumin (BSA) exposed to TiO2 (P25) nanoparticles or passing through commercial polyvinylidene fluoride (PVDF) membranes coated with the same nanoparticles. We have found that the filtering process and prolonged exposure to TiO2 nanoparticles had significant effects on different regions of BSA, and denaturation of the protein was not observed, neither with the TiO2 nanoparticles nor when passing through the TiO2-coated filter membranes.
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Affiliation(s)
- Krisztina Sebők-Nagy
- Institute of Biophysics, Biological Research Centre Szeged, 6726 Szeged, Hungary; (K.S.-N.); (Z.K.); (A.K.); (A.D.)
| | - Zoltán Kóta
- Institute of Biophysics, Biological Research Centre Szeged, 6726 Szeged, Hungary; (K.S.-N.); (Z.K.); (A.K.); (A.D.)
| | - András Kincses
- Institute of Biophysics, Biological Research Centre Szeged, 6726 Szeged, Hungary; (K.S.-N.); (Z.K.); (A.K.); (A.D.)
| | - Ákos Ferenc Fazekas
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, 6725 Szeged, Hungary; (Á.F.F.); (Z.L.)
| | - András Dér
- Institute of Biophysics, Biological Research Centre Szeged, 6726 Szeged, Hungary; (K.S.-N.); (Z.K.); (A.K.); (A.D.)
| | - Zsuzsanna László
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, 6725 Szeged, Hungary; (Á.F.F.); (Z.L.)
| | - Tibor Páli
- Institute of Biophysics, Biological Research Centre Szeged, 6726 Szeged, Hungary; (K.S.-N.); (Z.K.); (A.K.); (A.D.)
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Li Y, Zhao Z, Nai X, Li M, Kong J, Chen Y, Liu M, Zhang Q, Liu J, Yan H. Effects of Temperature, Metal Ions and Biosurfactants on Interaction Mechanism between Caffeic Acid Phenethyl Ester and Hemoglobin. Molecules 2023; 28:molecules28083440. [PMID: 37110675 PMCID: PMC10144779 DOI: 10.3390/molecules28083440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Caffeic acid phenylethyl ester (CAPE) is a natural polyphenol extracted from propolis, which is reported to have several pharmacological effects such as antibacterial, antitumor, antioxidant and anti-inflammatory activities. Hemoglobin (Hb) is closely related to the transport of drugs, and some drugs, including CAPE, can lead to a change in Hb concentration. Herein, the effects of temperature, metal ions and biosurfactants on the interaction between CAPE and Hb were studied using ultraviolet-visible spectroscopy (UV-Vis), fluorescence spectroscopy, circular dichroism (CD), dynamic light scattering (DLS) and molecular docking analysis. The results showed that the addition of CAPE led to changes in the microenvironment of Hb amino acid residues as well as the secondary structure of Hb. Hydrogen bonding and van der Waals force were found to be the main driving forces for the interaction between CAPE and Hb through fluorescence spectroscopy and thermodynamic parameter data. The results of fluorescence spectroscopy also showed that lowering the temperature, adding biosurfactants (sodium cholate (NaC) and sodium deoxycholate (NaDC)) and the presence of Cu2+ increased the binding force between CAPE and Hb. These results provide useful data for the targeted delivery and absorption of CAPE and other drugs.
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Affiliation(s)
- Yutong Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Zhen Zhao
- College of Pharmacy, Liaocheng University, Liaocheng 252059, China
| | - Xiao Nai
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Mingyuan Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Jing Kong
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Yanrong Chen
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Min Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Qian Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Jie Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Hui Yan
- College of Pharmacy, Liaocheng University, Liaocheng 252059, China
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Liu H, Wang B, Xing M, Meng F, Zhang S, Yang G, Cheng A, Yan C, Xu B, Gao Y. Thermal stability of exenatide encapsulated in stratified dissolving microneedles during storage. Int J Pharm 2023; 636:122863. [PMID: 36934885 DOI: 10.1016/j.ijpharm.2023.122863] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023]
Abstract
As low-temperature storage and transportation of peptides require high costs, improving the dosage form of peptides can reduce costs. We developed a thermostable and fast-releasing stratified dissolving microneedle (SDMN) system for delivering exenatide (EXT) to patients with type 2 diabetes. Among the tested polymers, dextran and polyvinyl alcohol (PVA) were the best at stabilizing EXT under high-temperature storage for 9 weeks. The two polymers possess a relatively high glass transition temperature (Tg) and weak hydrogen bonding between PVA and EXT. Additionally, zinc sulfate (ZnSO4) had a stabilizing effect on EXT among the selected stabilizers, suggesting that EXT formed a dimer after coordination with zinc ions (Zn2+). In addition, the denaturation temperature (Tm) of EXT was increased by adding ZnSO4, thus stabilizing EXT. Accordingly, SDMNs consisting of a tip layer (dextran encapsulating the Zn2+-EXT complex) and a base layer (PVA) were fabricated. Within 2 min of implantation, the EXT loaded on the patch was quickly released into the skin. Transdermal pharmacokinetics studies showed that manufactured SDMNs generated comparable efficacy to subcutaneous injection. Significantly, the remaining EXT amount was not significantly different under storage at 40 °C and -20 °C for 3 months, supporting that the SDMN system had excellent delivery efficiency and stability, thus reducing the dependence on the cold chain.
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Affiliation(s)
- Han Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baorui Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengzhen Xing
- Key Laboratory of New Material Research Institute, Department of Pharmaceutical Research Institute, Shandong University of Traditional Chinese Medicine, No. 4655, Daxue Road, Jinan 250355, China
| | - Fanda Meng
- School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 6699, Qingdao Road, Huaiyin District, Jinan 250000, China
| | - Suohui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; Beijing CAS Microneedle Technology Ltd., Beijing 102609, China
| | - Guozhong Yang
- Beijing CAS Microneedle Technology Ltd., Beijing 102609, China
| | - Aguo Cheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chenxin Yan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Xu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunhua Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; Beijing CAS Microneedle Technology Ltd., Beijing 102609, China.
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8
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Protein-Nanoparticle Interactions Govern the Interfacial Behavior of Polymeric Nanogels: Study of Protein Corona Formation at the Air/Water Interface. Int J Mol Sci 2023; 24:ijms24032810. [PMID: 36769129 PMCID: PMC9917661 DOI: 10.3390/ijms24032810] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
Biomedical applications of nanoparticles require a fundamental understanding of their interactions and behavior with biological interfaces. Protein corona formation can alter the morphology and properties of nanomaterials, and knowledge of the interfacial behavior of the complexes, using in situ analytical techniques, will impact the development of nanocarriers to maximize uptake and permeability at cellular interfaces. In this study we evaluate the interactions of acrylamide-based nanogels, with neutral, positive, and negative charges, with serum-abundant proteins albumin, fibrinogen, and immunoglobulin G. The formation of a protein corona complex between positively charged nanoparticles and albumin is characterized by dynamic light scattering, circular dichroism, and surface tensiometry; we use neutron reflectometry to resolve the complex structure at the air/water interface and demonstrate the effect of increased protein concentration on the interface. Surface tensiometry data suggest that the structure of the proteins can impact the interfacial properties of the complex formed. These results contribute to the understanding of the factors that influence the bio-nano interface, which will help to design nanomaterials with improved properties for applications in drug delivery.
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9
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Hybrid protein-polymer nanoparticles based on P(NVCL-co-DMAEMA) loaded with cisplatin as a potential anti-cancer agent. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Takechi-Haraya Y, Ohgita T, Demizu Y, Saito H, Izutsu KI, Sakai-Kato K. Current Status and Challenges of Analytical Methods for Evaluation of Size and Surface Modification of Nanoparticle-Based Drug Formulations. AAPS PharmSciTech 2022; 23:150. [PMID: 35596094 PMCID: PMC9122548 DOI: 10.1208/s12249-022-02303-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/09/2022] [Indexed: 01/02/2023] Open
Abstract
The present review discusses the current status and difficulties of the analytical methods used to evaluate size and surface modifications of nanoparticle-based pharmaceutical products (NPs) such as liposomal drugs and new SARS-CoV-2 vaccines. We identified the challenges in the development of methods for (1) measurement of a wide range of solid-state NPs, (2) evaluation of the sizes of polydisperse NPs, and (3) measurement of non-spherical NPs. Although a few methods have been established to analyze surface modifications of NPs, the feasibility of their application to NPs is unknown. The present review also examined the trends in standardization required to validate the size and surface measurements of NPs. It was determined that there is a lack of available reference materials and it is difficult to select appropriate ones for modified NP surface characterization. Research and development are in progress on innovative surface-modified NP-based cancer and gene therapies targeting cells, tissues, and organs. Next-generation nanomedicine should compile studies on the practice and standardization of the measurement methods for NPs to design surface modifications and ensure the quality of NPs.
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Affiliation(s)
- Yuki Takechi-Haraya
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, 210-9501, Japan.
| | - Takashi Ohgita
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, 5 Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto, 607-8414, Japan
| | - Yosuke Demizu
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, 210-9501, Japan
| | - Hiroyuki Saito
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, 5 Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto, 607-8414, Japan
| | - Ken-Ichi Izutsu
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, 210-9501, Japan
| | - Kumiko Sakai-Kato
- School of Pharmacy, Kitasato University, Shirokane 5-9-1, Minato-ku, Tokyo, 108-8641, Japan.
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11
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Second-Order Scattering Quenching in Fluorescence Spectra of Natural Humates as a Tracer of Formation Stable Supramolecular System for the Delivery of Poorly Soluble Antiviral Drugs on the Example of Mangiferin and Favipiravir. Pharmaceutics 2022; 14:pharmaceutics14040767. [PMID: 35456601 PMCID: PMC9030643 DOI: 10.3390/pharmaceutics14040767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 12/04/2022] Open
Abstract
In the present work, the methods of dynamic light scattering and fluorescence spectroscopy were applied to study the optical properties of aqueous dilutions of the humic substances complex (HC) as a potential drug delivery system. The supramolecular structures in the humate solution were characterized as monodisperse systems of the submicron range with a tendency to decrease in particle size with a decrease in the dry matter concentration. The slightly alkaline medium (8.3) of the studied aqueous dilutions of HC causes the absence of a pronounced fluorescence maximum in the region from 400 to 500 nm. However, the presence of an analytically significant, inversely proportional to the concentration second-order scattering (SOS) signal at 2λex = λem was shown. In the examples of the antiviral substances mangiferin and favipiravir, it was shown that the use of the humic complex as a drug carrier makes it possible to increase the solubility by several times and simultaneously obtain a system with a smaller particle size of the dispersed phase. It has been shown that HC can interact with mangiferin and favipiravir to form stable structures, which lead to a significant decrease in SOS intensities on HC SOS spectra. The scattering wavelengths, λex/λem, were registered at 350 nm/750 nm for mangiferin and 365 nm/730 nm for favipiravir, respectively. The increments of the scattering intensities (I0/I) turned out to be proportional to the concentration of antiviral components in a certain range of concentrations.
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12
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Sahoo AK, Schreiber F, Netz RR, Maiti PK. Role of entropy in determining the phase behavior of protein solutions induced by multivalent ions. SOFT MATTER 2022; 18:592-601. [PMID: 34928291 DOI: 10.1039/d1sm00730k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Recent experiments have reported lower critical solution temperature (LCST) phase behavior of aqueous solutions of proteins induced by multivalent ions, where the solution phase separates upon heating. This phenomenon is linked to complex hydration effects that result in a net entropy gain upon phase separation. To decipher the underlying molecular mechanism, we use all-atom molecular dynamics simulations along with the two-phase thermodynamic method for entropy calculation. Based on simulations of a single BSA protein in various salt solutions (NaCl, CaCl2, MgCl2, and YCl3) at temperatures (T) ranging 283-323 K, we find that the cation-protein binding affinity increases with T, reflecting its thermodynamic driving force to be entropic in origin. We show that in the cation binding process, many tightly bound water molecules from the solvation shells of a cation and the protein are released to the bulk, resulting in entropy gain. To rationalize the LCST behavior, we calculate the ζ-potential that shows charge inversion of the protein for solutions containing multivalent ions. The ζ-potential increases with T. Performing simulations of two BSA proteins, we demonstrate that the protein-protein binding is mediated by multiple cation bridges and involves similar dehydration effects that cause a large entropy gain which more than compensates for rotational and translational entropy losses of the proteins. Thus, the LCST behavior is entropy-driven, but the associated solvation effects are markedly different from hydrophobic hydration. Our findings have direct implications for tuning the phase behavior of biological and soft-matter systems, e.g., protein condensation and crystallization.
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Affiliation(s)
- Anil Kumar Sahoo
- Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore-560012, India.
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Frank Schreiber
- Institute for Applied Physics, University of Tübingen, 72076 Tübingen, Germany
| | - Roland R Netz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
- Department of Physics, Indian Institute of Science, Bangalore-560012, India
| | - Prabal K Maiti
- Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore-560012, India.
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13
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Polat H, Eren MC, Polat M. The effect of protein BSA on the stability of lipophilic drug (docetaxel)-loaded polymeric micelles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Deciphering the DNA-binding affinity, cytotoxicity and apoptosis induce as the anticancer mechanism of Bavachinin: An experimental and computational investigation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117373] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Espeche Turbay MB, Rey V, Dorado RD, Sosa MC, Borsarelli CD. Silver nanoparticle-protein interactions and the role of lysozyme as an antagonistic antibacterial agent. Colloids Surf B Biointerfaces 2021; 208:112030. [PMID: 34419807 DOI: 10.1016/j.colsurfb.2021.112030] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/30/2021] [Accepted: 08/07/2021] [Indexed: 11/30/2022]
Abstract
The photoreductive synthesis and antibacterial activity of silver nanoparticles (AgNP) prepared in the presence of bovine serum albumin (BSA) and lysozyme (LZ) were evaluated. AgNP@BSA showed similar antibacterial activity to those stabilized with citrate (AgNP@CIT) and to an AgNO3 solution, suggesting the releases of Ag+ as the mechanism of death. In contrast, AgNP@LZ solutions showed no activity, although LZ behaves as a moderately antibacterial peptide. Furthermore, the addition of LZ to the AgNP@CIT or AgNP@BSA solutions induced their agglomeration and suppressed their original antibacterial efficacy. This antagonistic antibacterial effect exerted by LZ on AgNPs is associated with electrostatic interactions exerted by LZ. Specific metal-LZ interactions produce a harder protein corona on AgNP@LZ that retains Ag+, while LZ acts as a glue for AgNP@CIT or AgNP@LZ due to its opposite electrical charge, besides strong binding to Ag+avoiding the bactericide effect. Therefore, bactericidal effects of AgNP in biological media may be modulated by specific protein interactions.
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Affiliation(s)
- M Beatriz Espeche Turbay
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, G4206XCP, Santiago del Estero, Argentina; ICQ - Facultad de Agronomía y Agroindustrias, UNSE, Av. Belgrano (S) 1912, Santiago del Estero, Argentina.
| | - Valentina Rey
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, G4206XCP, Santiago del Estero, Argentina; ICQ - Facultad de Agronomía y Agroindustrias, UNSE, Av. Belgrano (S) 1912, Santiago del Estero, Argentina
| | - Rita D Dorado
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, G4206XCP, Santiago del Estero, Argentina
| | - Marcelo C Sosa
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, G4206XCP, Santiago del Estero, Argentina
| | - Claudio D Borsarelli
- Instituto de Bionanotecnología del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, G4206XCP, Santiago del Estero, Argentina; ICQ - Facultad de Agronomía y Agroindustrias, UNSE, Av. Belgrano (S) 1912, Santiago del Estero, Argentina.
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16
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Protein corona components of polyethylene glycol-conjugated organosilica nanoparticles modulates macrophage uptake. Colloids Surf B Biointerfaces 2021; 199:111527. [DOI: 10.1016/j.colsurfb.2020.111527] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/01/2020] [Accepted: 12/07/2020] [Indexed: 12/25/2022]
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17
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Shoaebargh S, Wright E, Csordas M, Medina MFC, Lichty B, Latulippe DR. Probing effects of additives on the filterability of oncolytic viruses via a microfiltration process. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Interaction of artemisinin protects the activity of antioxidant enzyme catalase: A biophysical study. Int J Biol Macromol 2021; 172:418-428. [PMID: 33460658 DOI: 10.1016/j.ijbiomac.2021.01.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/22/2020] [Accepted: 01/12/2021] [Indexed: 01/09/2023]
Abstract
The major antioxidant enzyme catalase is downregulated and the enzyme activity is compromised in various disease conditions such as malarial and cancer. Hence, the restoration and protection of catalase is a promising therapeutic strategy in disease management. In the present study, for the first time we have demonstrated the protective role of well-known anti-malarial drug Artemisinin (ART) on the time and temperature-induced degradation of bovine liver catalase (BLC) activity. The findings at different time intervals and at higher temperature showed the protective role of ART on BLC activity. Molecular docking studies suggested specific binding of ART on BLC through heme group interface which was further supported by cyclic voltammetry and dynamic light scattering study. The stabilization of BLC in presence of ART was mediated through forming a BLC-ART complex with reduced and shifted electrochemical peak and increased hydrodynamic diameter. ART substantially prevents the temperature-induced reduction in α-helical content with simultaneous increment in other secondary structures like antiparallel, parallel, β-turn and random coils. Nevertheless, the protective role of ART was accepted from the enhanced thermal stability and increased Tm value of BLC in presence of ART at higher temperatures. Our results uncover the mechanism of interaction between ART with BLC and suggest the protective role of ART towards spatiotemporal alteration of BLC by preventing the structural and molecular change in BLC. Thus, the findings advocate ART as a potential therapeutic drug for diseases associated with reduced catalase activity.
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19
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Pasqua M, Pereira U, de Lartigue C, Nicolas J, Vigneron P, Dermigny Q, Legallais C. Preclinical characterization of alginate-poly-L-lysine encapsulated HepaRG for extracorporeal liver supply. Biotechnol Bioeng 2020; 118:453-464. [PMID: 32997339 DOI: 10.1002/bit.27583] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/15/2020] [Accepted: 09/26/2020] [Indexed: 12/26/2022]
Abstract
We recently demonstrated that HepaRG cells encapsulated into 1.5% alginate beads are capable of self-assembling into spheroids. They adequately differentiate into hepatocyte-like cells, with hepatic features observed at Day 14 post-encapsulation required for external bioartificial liver applications. Preliminary investigations performed within a bioreactor under shear stress conditions and using a culture medium mimicking acute liver failure (ALF) highlighted the need to reinforce beads with a polymer coating. We demonstrated in a first step that a poly-l-lysine coating improved the mechanical stability, without altering the metabolic activities necessary for bioartificial liver applications (such as ammonia and lactate elimination). In a second step, we tested the optimized biomass in a newly designed perfused dynamic bioreactor, in the presence of the medium model for pathological plasma for 6 h. Performances of the biomass were enhanced as compared to the steady configuration, demonstrating its efficacy in decreasing the typical toxins of ALF. This type of bioreactor is easy to scale up as it relies on the number of micro-encapsulated cells, and could provide an adequate hepatic biomass for liver supply. Its design allows it to be integrated into a hybrid artificial/bioartificial liver setup for further clinical studies regarding its impact on ALF animal models.
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Affiliation(s)
- Mattia Pasqua
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Ulysse Pereira
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Claire de Lartigue
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Jonathan Nicolas
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Pascale Vigneron
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Quentin Dermigny
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France
| | - Cécile Legallais
- Université de technologie de Compiègne, CNRS, Laboratoire de Biomécanique et Bioingénierie, Centre de recherche de Royallieu, Compiègne, France.,DHU Hépatinov, Villejuif, France
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20
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Polat H, Kutluay G, Polat M. Analysis of dilution induced disintegration of micellar drug carriers in the presence of inter and intra micellar species. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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21
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Liu Y, Huang L, Li D, Wang Y, Chen Z, Zou C, Liu W, Ma Y, Cao MJ, Liu GM. Re-assembled oleic acid-protein complexes as nano-vehicles for astaxanthin: Multispectral analysis and molecular docking. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105689] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Hekmat A, Salavati F, Hesami Tackallou S. The Effects of Paclitaxel in the Combination of Diamond Nanoparticles on the Structure of Human Serum Albumin (HSA) and Their Antiproliferative Role on MDA-MB-231cells. Protein J 2020; 39:268-283. [DOI: 10.1007/s10930-020-09882-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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23
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Guo Q, Liu M, Zhao Y, Wu Y, Liu J, Cai C, Shi Y, Han J. Spectroscopic and cytotoxicity studies on the combined interaction of (-)-epigallocatechin-3-gallate and anthracycline drugs with human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117213. [PMID: 31177010 DOI: 10.1016/j.saa.2019.117213] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/26/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
The interactions of (-)-epigallocatechin-3-Gallate (EGCG) and anthracycline drugs (doxorubicin, DOX and epirubicin, EPI) alone or in combination with human serum albumin (HSA) under physiological condition were studied by fluorescence spectroscopy, UV-vis absorption spectroscopy, circular dichroism (CD) spectroscopy, and dynamic light scattering (DLS). The cytotoxic activity of the single drug, combined drugs, and their complexes with HSA against human cervical cancer HeLa cell line was determined by MTT assay. Fluorescence quenching result and difference spectra of UV absorption revealed the formation of static complex between EGCG, DOX, or EPI and HSA. The binding of EGCG with HSA was driven by both enthalpy and entropy while the binding of DOX or EPI was mainly entropy driven. The nature of binding was expounded based on the effect of sodium chloride, tetrabutylammonium bromide, and sucrose which interfere in electrostatic, hydrophobic, and hydrogen bonding interactions, respectively. Site marker competitive experiments combined with synchronous fluorescence spectra showed that these three ligands mainly bound to subdomain IIA of HSA and were closer to tryptophan residues. In EGCG + DOX/EPI + HSA ternary system, the effect of one drug on the binding ability of another drug was discussed. The influences of the individual and combined binding of EGCG and DOX/EPI on the secondary structure and particle size of HSA were investigated by CD spectroscopy and DLS, respectively. Moreover, the synergistic cytotoxicity of EGCG and DOX/EPI as well as their complexes with HSA were discussed. Obtained results would provide beneficial information on the combination of EGCG and anthracyclines in clinic.
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Affiliation(s)
- Qingying Guo
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Min Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China; Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China.
| | - Yanna Zhao
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China
| | - Yushu Wu
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China
| | - Jie Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Chang Cai
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China
| | - Yabo Shi
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China
| | - Jun Han
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China
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24
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Liu R, Gang L, Shen X, Xu H, Wu F, Sheng L. Binding Characteristics and Superimposed Antioxidant Properties of Caffeine Combined with Superoxide Dismutase. ACS OMEGA 2019; 4:17417-17424. [PMID: 31656914 PMCID: PMC6812128 DOI: 10.1021/acsomega.9b02205] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/24/2019] [Indexed: 05/08/2023]
Abstract
The binding characteristics and superimposed antioxidant properties of caffeine combined with copper/zinc superoxide dismutase (SOD) were studied. The superimposed antioxidant activity of caffeine with SOD was investigated by detecting the concentration of malondialdehyde (MDA) present in cells, which was induced by hyperthermia and heavy metal exposure. The interactions between the SOD enzyme and caffeine were researched by ultraviolet spectrum, fluorescence spectrum, and molecular computation. The relative amounts of MDA contents of caffeine (0.1 mmol/L), SOD (0.1 mg/L), and caffeine (0.1 mmol/L) and SOD (0.1 mg/L) to water in cells were 0.70, 0.72, and 0.54, respectively, indicating that the antioxidant properties of caffeine combined with SOD may be superimposed. The fluorescence spectroscopy and molecular computation results show that the mixture of caffeine and SOD can result in the formation of a 1:1 complex through hydrogen bond and van der Waals forces spontaneously. The binding constant (K a) of caffeine with SOD at five different temperatures are 4.41 × 104, 3.30 × 104, 2.29 × 104, 1.71 × 104, and 1.17 × 104 L/mol. The changes of Gibbs-free energy (ΔG) are -26.50, -26.21, -25.71, -25.12, and -24.29 KJ/mol and the ΔG of molecular docking calculation is -26.95 KJ/mol. The experimental results are in accordance with the results of theoretical calculations. The combination of caffeine with SOD can change the conformation and microenvironment of SOD but does not change the activity of SOD. In addition, the combination can superimpose the antioxidant activity of caffeine and SOD.
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Affiliation(s)
- Ruirui Liu
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
- Engineering
Research Centre of Biomass Conversion and Pollution Prevention Control
of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Liping Gang
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
| | - Xiaobao Shen
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
| | - Huajie Xu
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
- Engineering
Research Centre of Biomass Conversion and Pollution Prevention Control
of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Fufang Wu
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
- Engineering
Research Centre of Biomass Conversion and Pollution Prevention Control
of Anhui Provincial Department of Education, Fuyang 236037, China
- E-mail: (F.W.)
| | - Liangquan Sheng
- School
of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
- Engineering
Research Centre of Biomass Conversion and Pollution Prevention Control
of Anhui Provincial Department of Education, Fuyang 236037, China
- E-mail: . Phone: 86-0558-2593836. Fax: 86-0558-2593836 (L.S.)
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25
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Damiati S, Scheberl A, Zayni S, Damiati SA, Schuster B, Kompella UB. Albumin-bound nanodiscs as delivery vehicle candidates: Development and characterization. Biophys Chem 2019; 251:106178. [DOI: 10.1016/j.bpc.2019.106178] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 04/28/2019] [Accepted: 04/28/2019] [Indexed: 10/26/2022]
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26
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Rada JP, Bastos BSM, Anselmino L, Franco CHJ, Lanznaster M, Diniz R, Fernández CO, Menacho-Márquez M, Percebom AM, Rey NA. Binucleating Hydrazonic Ligands and Their μ-Hydroxodicopper(II) Complexes as Promising Structural Motifs for Enhanced Antitumor Activity. Inorg Chem 2019; 58:8800-8819. [DOI: 10.1021/acs.inorgchem.9b01195] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jesica Paola Rada
- Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | - Beatriz S. M. Bastos
- Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | - Luciano Anselmino
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, S2002LRK Rosario, Argentina
| | | | | | - Renata Diniz
- Federal University of Minas Gerais, Belo Horizonte, 31270-901, Brazil
| | - Claudio O. Fernández
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, S2002LRK Rosario, Argentina
| | - Mauricio Menacho-Márquez
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, S2002LRK Rosario, Argentina
| | - Ana Maria Percebom
- Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | - Nicolás A. Rey
- Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
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27
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Wu F, Liu R, Shen X, Xu H, Sheng L. Study on the interaction and antioxidant activity of theophylline and theobromine with SOD by spectra and calculation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 215:354-362. [PMID: 30852283 DOI: 10.1016/j.saa.2019.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 02/28/2019] [Accepted: 03/02/2019] [Indexed: 06/09/2023]
Abstract
Theophylline (TP) and theobromine (TB) are the methyl derivatives of xanthine. The antioxidation of TP and TB as well as the effect of the antioxidation and activity of copper‑zinc superoxide dismutase (SOD) with TP and TB were investigated. The contents of MDA in cells showed that both TP (14.49 μmol/g) and TB (14.25 μmol/g) are active in oxidation resistance and closed to the antioxidant effect of SOD (13.77 μmol/g). With the formation of TP-SOD and TB-SOD, the antioxidant ability can be superimposed. The interactions between TP/TB and SOD were studied by ultraviolet spectrum, fluorescence spectrum and molecular docking. The results showed that the complex of TP/TB and SOD with 1:1 component was stabilized by hydrogen bonding and van der Waals forces. The analysis also indicated that the microenvironment and structure of SOD were changed. All of the results indicate that the complex formation of TP-SOD and TB-SOD can maintain their respective antioxidant effects without changes in the activity of SOD.
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Affiliation(s)
- Fufang Wu
- School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China; Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Ruirui Liu
- School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China; Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Xiaobao Shen
- School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China; Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Huajie Xu
- School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China; Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang 236037, China
| | - Liangquan Sheng
- School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China; Engineering Research Center of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang 236037, China.
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28
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Abstiens K, Maslanka Figueroa S, Gregoritza M, Goepferich AM. Interaction of functionalized nanoparticles with serum proteins and its impact on colloidal stability and cargo leaching. SOFT MATTER 2019; 15:709-720. [PMID: 30624437 DOI: 10.1039/c8sm02189a] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The majority of effort in the area of polymeric nanocarriers is aimed at providing controlled drug delivery in vivo. Therefore, it is essential to understand the delicate interplay of polymeric NPs with serum proteins in order to forecast their performance in a biological system. In this study, the interaction of serum proteins with functionalized polymeric colloids as a function of particle charge and hydrophobicity was investigated. Moreover, impact on NP stability and cargo leaching was assessed. The hard protein corona of polymeric NPs with either uncharged methoxy groups (methoxy-NPs), positively charged amine groups (amine-NPs), negatively charged carboxylic acid groups (carboxyl-NPs) or zwitterionic NPs decorated with amine and carboxylic acid groups (zwitterion-NPs) was quantitatively and qualitatively analyzed and correlated with the respective colloidal stability using fluorescence resonance energy transfer. Positively charged amine-NPs displayed an enhanced interaction with serum proteins via electrostatic interactions resulting in a hard corona consisting of diverse protein components. As revealed by FRET and agarose gel electrophoresis, the enhanced adsorption of proteins onto the colloidal surface significantly altered the NP identity and severely impaired the colloidal integrity as the lipophilic cargo was continuously leached out of the hydrophobic NP core. These results highlight the importance of generating a profound knowledge of the bio-nano interface as adherence of biomolecules can severely compromise the performance of a colloidal drug delivery system by changing its identity and integrity.
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Affiliation(s)
- Kathrin Abstiens
- Department of Pharmaceutical Technology, University of Regensburg, 93040 Regensburg, Germany.
| | - Sara Maslanka Figueroa
- Department of Pharmaceutical Technology, University of Regensburg, 93040 Regensburg, Germany.
| | - Manuel Gregoritza
- Department of Pharmaceutical Technology, University of Regensburg, 93040 Regensburg, Germany.
| | - Achim M Goepferich
- Department of Pharmaceutical Technology, University of Regensburg, 93040 Regensburg, Germany.
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29
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Kumar B, K S, Chandra, Kaur M, Jasinski JP, Revanasiddappa H. 4-Chloro-2-(5,6-dihydro-benzo[4,5]imidazo[1,2-c]quinazolin-6-yl)-phenol (HL); synthesis, characterization, crystal structure, Hirshfeld surface analysis and BSA binding studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Sun X, Huang J, Zeng H, Wu J. Protein-Resistant Property of Egg White Ovomucin under Different pHs and Ionic Strengths. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11034-11042. [PMID: 30277391 DOI: 10.1021/acs.jafc.8b03905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ovomucin is a mucin-type glycoprotein accounting for 3.5% (w/w) of total egg white proteins. The purpose of the study was to explore the potential of ovomucin as a protein-resistant material. Using bovine serum albumin (BSA) as a model protein, ovomucin decreased the fluorescence intensities of the adsorbed BSA from 10.90 ± 2.18 to 0.67 ± 0.75, indicating its protein-resistant property. To understand the underlying mechanism, pure repulsive forces between ovomucin and model proteins (e.g., BSA and ovomucin) at various pHs (2.0, 6.0, and 7.2) and ionic strengths (0.1, 10, and 150 mM NaCl) were measured using a surface forces apparatus. Further studies by using atomic force microscope imaging, zeta potential, and dynamic light scattering suggested that the protein-resistant property of ovomucin was mainly attributed to strong electrostatic and steric repulsions between protein layers. This work has demonstrated that ovomucin has antifouling potential with broad applications in the areas of food processing industry and biomedical implants.
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Affiliation(s)
- Xiaohong Sun
- Department of Agricultural, Food & Nutritional Science , University of Alberta , Edmonton , Alberta T6G 2P5 , Canada
- College of Food and Biological Engineering , Qiqihar University , Qiqihar , Heilongjiang 161006 , China
| | - Jun Huang
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 2 V4 , Canada
| | - Hongbo Zeng
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 2 V4 , Canada
| | - Jianping Wu
- Department of Agricultural, Food & Nutritional Science , University of Alberta , Edmonton , Alberta T6G 2P5 , Canada
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Yuan L, Liu M, Sun B, Liu J, Wei X, Wang Z, Wang B, Han J. Calorimetric and spectroscopic studies on the competitive behavior between (−)-epigallocatechin-3-gallate and 5-fluorouracil with human serum albumin. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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A Multiparticulate Delivery System for Potential Colonic Targeting Using Bovine Serum Albumin as a Model Protein : Theme: Formulation and Manufacturing of Solid Dosage Forms Guest Editors: Tony Zhou and Tonglei Li. Pharm Res 2017; 34:2663-2674. [PMID: 28808837 DOI: 10.1007/s11095-017-2237-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 07/25/2017] [Indexed: 12/18/2022]
Abstract
PURPOSE There are many important diseases whose treatment could be improved by delivering a therapeutic protein to the colon, for example, Clostridium difficile infection, ulcerative colitis and Crohn's Disease. The goal of this project was to investigate the feasibility of colonic delivery of proteins using multiparticulate beads. METHODS In this work, bovine serum albumin (BSA) was adopted as a model protein. BSA was spray layered onto beads, followed by coating of an enteric polymer EUDRAGIT® FS 30 D to develop a colonic delivery system. The secondary and tertiary structure change and aggregation of BSA during spray layering process was examined. The BSA layered beads were then challenged in an accelerated stability study using International Council for Harmonization (ICH) conditions. The in vitro release of BSA from enteric coated beads was examined using United States Pharmacopeia (USP) dissolution apparatus 1. RESULTS No significant changes in the secondary and tertiary structure or aggregation profile of BSA were observed after the spray layering process. Degradation of BSA to different extents was detected after storing at 25°C and 40°C for 38 days. Enteric coated BSA beads were intact in acidic media while released BSA in pH 7.4 phosphate buffer. CONCLUSION We showed the feasibility of delivering proteins to colon in vitro using multiparticulate system.
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Raza M, Ahmad A, Yue F, Khan Z, Jiang Y, Wei Y, Raza S, He WW, Khan FU, Qipeng Y. Biophysical and molecular docking approaches for the investigation of biomolecular interactions between amphotericin B and bovine serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 170:6-15. [DOI: 10.1016/j.jphotobiol.2017.03.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 03/20/2017] [Accepted: 03/21/2017] [Indexed: 12/16/2022]
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Kaur A, Banipal PK, Banipal TS. Study on the interactional behaviour of transition metal ions with myoglobin: A detailed calorimetric, spectroscopic and light scattering analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 174:236-244. [PMID: 27923210 DOI: 10.1016/j.saa.2016.11.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/14/2016] [Accepted: 11/24/2016] [Indexed: 06/06/2023]
Abstract
The energetics and the impact on the conformation of heme containing protein myoglobin (Mb) due to the binding of three transition metal ions (Zn2+, Ni2+, and Mn2+) have been investigated using isothermal titration calorimetry (ITC), dynamic light scattering (DLS), UV-vis, and circular dichroism (CD) spectroscopy under physiological conditions. The binding affinity of the order of 104M-1 has been observed for all metal ions from calorimetry as well as from absorption spectroscopy. The binding of these metal ions with Mb is a spontaneous process that exposes the hydrophobic groups away from the protein core as exhibited by the negative Gibbs free energy change (ΔG) and positive heat capacity change (ΔCp) values. Both light scattering and CD results demonstrates that the binding of Zn2+ and Mn2+ ions with Mb results in the folding whereas Ni2+ ion results in the unfolding of the protein. No direct interactions among the transition metal ions and heme moiety of Mb has been observed from absorption study. The results of these studies reveals that Mn2+ ion influences the biological functions of Mb to a larger extent in spite of its lowest affinity followed by Zn2+ and Ni2+ ions.
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Affiliation(s)
- Amandeep Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Parampaul K Banipal
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Tarlok S Banipal
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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Mukherjee AK, Dutta S, Kalita B, Jha DK, Deb P, Mackessy SP. Structural and functional characterization of complex formation between two Kunitz-type serine protease inhibitors from Russell's Viper venom. Biochimie 2016; 128-129:138-47. [PMID: 27523780 DOI: 10.1016/j.biochi.2016.08.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 08/10/2016] [Indexed: 11/19/2022]
Abstract
Snake venom Kunitz-type serine protease inhibitors (KSPIs) exhibit various biological functions including anticoagulant activity. This study elucidates the occurrence and subunit stoichiometry of a putative complex formed between two KSPIs (Rusvikunin and Rusvikunin-II) purified from the native Rusvikunin complex of Pakistan Russell's Viper (Daboia russelii russelii) venom (RVV). The protein components of the Rusvikunin complex were identified by LC-MS/MS analysis. The non-covalent interaction between two major components of the complex (Rusvikunin and Rusvikunin-II) at 1:2 stoichiometric ratio to form a stable complex was demonstrated by biophysical techniques such as spectrofluorometric, classical gel-filtration, equilibrium gel-filtration, circular dichroism (CD), dynamic light scattering (DLS), RP-HPLC and SDS-PAGE analyses. CD measurement showed that interaction between Rusvikunin and Rusvikunin-II did not change their overall secondary structure; however, the protein complex exhibited enhanced hydrodynamic diameter and anticoagulant activity as compared to the individual components of the complex. This study may lay the foundation for understanding the basis of protein complexes in snake venoms and their role in pathophysiology of snakebite.
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Affiliation(s)
- Ashis K Mukherjee
- Microbial Biotechnology and Protein Research Laboratory, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784028, Assam, India; School of Biological Sciences, University of Northern Colorado, Greeley, CO 80639-0017, USA.
| | - Sumita Dutta
- Microbial Biotechnology and Protein Research Laboratory, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784028, Assam, India
| | - Bhargab Kalita
- Microbial Biotechnology and Protein Research Laboratory, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784028, Assam, India
| | - Deepak K Jha
- Advanced Functional Material Laboratory, Department of Physics, Tezpur University, Tezpur 784028, Assam, India
| | - Pritam Deb
- Advanced Functional Material Laboratory, Department of Physics, Tezpur University, Tezpur 784028, Assam, India
| | - Stephen P Mackessy
- School of Biological Sciences, University of Northern Colorado, Greeley, CO 80639-0017, USA
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Zhu L, Zeng X, Zhang F. Fluorescence resonance energy transfer for investigation of the interaction of Para Red with serum albumins. LUMINESCENCE 2015; 31:328-334. [PMID: 26178918 DOI: 10.1002/bio.2962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/18/2015] [Accepted: 05/26/2015] [Indexed: 01/04/2023]
Abstract
Para Red (PR) has been isolated from food additives, and shown to be toxic to humans. To facilitate examination of its toxicity, the interaction between PR and serum albumins (SA) was studied using fluorescence quenching and circular dichroism (CD) spectrophotometry. The experiments showed that the fluorescence intensity of serum albumins decreased with increasing concentrations of PR, which resulted from the binding of PR and SA. The binding constant, number of binding sites and thermodynamic parameters were calculated and hydrogen bond and van der Waals interactions were shown to play a key role in the binding process. Competition experiments indicated that PR mainly binds to Trp residues of SA within the site I. As the CD and three-dimensional spectra revealed, the addition of PR induced a conformational change in SA.
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Affiliation(s)
- Lin Zhu
- School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, 132022, People's Republic of China
| | - Xiaodan Zeng
- Center of Analysis and Measurement, Jilin Institute of Chemical Technology, Jilin, 132022, People's Republic of China
| | - Fusheng Zhang
- Jilin Institute of Chemical Technology, Jilin, 132022, People's Republic of China
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Ray D, Kundu A, Pramanik A, Guchhait N. Exploring the Interaction of a Micelle Entrapped Biologically Important Proton Transfer Probe with the Model Transport Protein Bovine Serum Albumin. J Phys Chem B 2014; 119:2168-79. [DOI: 10.1021/jp504037y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Debarati Ray
- Department of Chemistry, University of Calcutta, 92 A. P. C.
Road, Kolkata, 700009, India
| | - Ashis Kundu
- Department of Chemistry, University of Calcutta, 92 A. P. C.
Road, Kolkata, 700009, India
| | - Animesh Pramanik
- Department of Chemistry, University of Calcutta, 92 A. P. C.
Road, Kolkata, 700009, India
| | - Nikhil Guchhait
- Department of Chemistry, University of Calcutta, 92 A. P. C.
Road, Kolkata, 700009, India
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In vitro studies on the interaction between human serum albumin and fosfomycin disodium salt, an antibiotic drug by multi-spectroscopic and molecular docking methods. Mol Biol Rep 2014; 41:2377-87. [DOI: 10.1007/s11033-014-3092-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Accepted: 01/04/2014] [Indexed: 11/25/2022]
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Pyrgiotakis G, Blattmann CO, Pratsinis S, Demokritou P. Nanoparticle-nanoparticle interactions in biological media by atomic force microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11385-95. [PMID: 23978039 PMCID: PMC4438084 DOI: 10.1021/la4019585] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Particle-particle interactions in physiological media are important determinants for nanoparticle fate and transport. Herein, such interactions are assessed by a novel atomic force microscopy (AFM)-based platform. Industry-relevant CeO2, Fe2O3, and SiO2 nanoparticles of various diameters were made by the flame spray pyrolysis (FSP)-based Harvard Versatile Engineering Nanomaterials Generation System (Harvard VENGES). The nanoparticles were fully characterized structurally and morphologically, and their properties in water and biological media were also assessed. The nanoparticles were attached on AFM tips and deposited on Si substrates to measure particle-particle interactions. The corresponding force was measured in air, water, and biological media that are widely used in toxicological studies. The presented AFM-based approach can be used to assess the agglomeration potential of nanoparticles in physiological fluids. The agglomeration potential of CeO2 nanoparticles in water and RPMI 1640 (Roswell Park Memorial Institute formulation 1640) was inversely proportional to their primary particle (PP) diameter, but for Fe2O3 nanoparticles, that potential is independent of PP diameter in these media. Moreover, in RPMI+10% Fetal Bovine Serum (FBS), the corona thickness and dispersibility of the CeO2 are independent of PP diameter, while for Fe2O3, the corona thickness and dispersibility were inversely proportional to PP diameter. The present method can be combined with dynamic light scattering (DLS), proteomics, and computer simulations to understand the nanobio interactions, with emphasis on the agglomeration potential of nanoparticles and their transport in physiological media.
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Affiliation(s)
- Georgios Pyrgiotakis
- Center for Nanotechnology and Nanotoxicology at Harvard School of Public Health, Harvard University , 665 Huntington Avenue, Boston, Massachusetts 02115, United States
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The binding characteristics of isoniazid with copper-zinc superoxide dismutase and its effect on enzymatic activity. Chem Cent J 2013; 7:97. [PMID: 23738738 PMCID: PMC3679938 DOI: 10.1186/1752-153x-7-97] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 05/30/2013] [Indexed: 11/16/2022] Open
Abstract
Background Isoniazid (INH) is front-line anti-tuberculosis (TB) drugs, which are usually prescribed to TB patients for a total period of 6 months. Antituberculosis drug-induced hepatotoxicity (ATDH) is a serious adverse reaction of TB treatment. It is reported that INH-induced hepatotoxicity is associated with oxidative stress. Superoxide dismutase (SOD, EC 1.15.1.1) is the key enzyme for the protection of oxidative stress, which catalyzes the removal of superoxide radical anion, thereby raising the need to better understand the interaction between INH and SOD. Results The experimental results showed that the fluorescence intensity of Cu/Zn-SOD regularly decreased owing to form a 1:1 INH-SOD complex. According to the corresponding association constants (KSV) between INH and SOD obtained from Stern–Volmer plot, it is shown that values of KA are 1.01 × 104, 5.31 × 103, 3.33 × 103, 2.20 × 103 L · mol−1 at four different temperatures, respectively. The binding constants, binding sites and the corresponding thermodynamic parameters (ΔH, ΔG and ΔS) were calculated. A value of 3.93 nm for the average distance between INH and chromophore of Cu/Zn-SOD was derived from Förster theory of non-radiation energy transfer. The conformational investigation showed that the presence of INH resulted in the microenvironment and conformational changes of Cu/Zn-SOD. In addition, Effects of INH on superoxide dismutase activity was examined. Conclusions The results show that the hydrogen bonding and van der Waals forces play major roles in stabilizing the 1:1 INH-SOD complex. After addition of INH during the range of the experiment, the conformation and microenvironment of Cu/Zn-SOD are changed, but the activity of Cu/Zn-SOD is not changed.
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Chen PW, Lee CP, Chang LY, Chang J, Yeh MH, Lin LY, Vittal R, Lin JJ, Ho KC. Dye-sensitized solar cells with low-cost catalytic films of polymer-loaded carbon black on their counter electrode. RSC Adv 2013. [DOI: 10.1039/c3ra23428b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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