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Banu A, Naqvi S, Qashqoosh MTA, Manea YK. Multispectroscopic and computational study of interaction of the bovine serum albumin with atropine and atropine-loaded chitosan nanoparticles (synthesized and characterized). J Biomol Struct Dyn 2023; 41:11137-11147. [PMID: 37211826 DOI: 10.1080/07391102.2023.2212802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/12/2022] [Indexed: 05/23/2023]
Abstract
Two different systems of bovine serum albumin (BSA) were used for multiple spectroscopic and computational studies to determine interaction of BSA and atropine (Atrop), that is, BSA-Atrop system and Atrop-loaded chitosan nanoparticles (Atrop@CS NPs), that is, BSA-Atrop@CS NPs system. The study suggests that BSA-Atrop system and BSA-Atrop@CS NPs system involve non-fluorescent complexes of Ksv = 3.2 × 103 Lmol-1 and 3.1 × 104 Lmol-1, kq = 3.2 × 1011 Lmol-1 s-1 and 3.1 × 1012 Lmol-1 s-1, the binding constant Kb = 1.4 × 103 Lmol-1, 2.0 × 102 Lmol-1, respectively, and number of binding sites n ∼ 1 for both the systems. The negligible conformational changes induced in BSA were also observed. Synchronous fluorescence spectroscopic study revealed that more quenching occurred in intrinsic fluorescence of tryptophan (Trp, W) than that in tyrosine residue (Tyr, Y). UV-vis spectroscopic study verified the presence of static quenching from the presence of BSA-Atrop and BSA-Atrop@CS NPs complexes. CD spectra confirmed the conformational changes induced in BSA upon increment of concentrations of Atrop and Atrop@CS NPs separately into the constant concentration of BSA. The coherent observations from various spectroscopic studies were in agreement with those of computational study, showing BSA-Atrop complex formation and other related details. The hydrogen bonds (H-bonds), van der Walls (vdW) interactions and π -type of interactions were mainly involved in stabilization of the formed BSA-Atrop complex.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Afreen Banu
- Chemistry Section, Women's College, Aligarh Muslim University, Aligarh, India
| | - Saeeda Naqvi
- Chemistry Section, Women's College, Aligarh Muslim University, Aligarh, India
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Lyu K, Zhao Y, Zhang M, Tang J, Zhang J, Liu Y, Bian X, Chen X, Chen H, Wang D. Tracking of Protein Adsorption on Poly(l-lactic acid) Film Surfaces: The Role of Molar Mass. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13534-13545. [PMID: 37712535 DOI: 10.1021/acs.langmuir.3c01571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Poly(l-lactic acid) (PLLA) has been extensively utilized as a biomaterial for various biomedical applications. The first and one of the most critical steps upon contact with biological fluids is the adsorption of proteins on the material's surface. Understanding the behavior of protein adsorption is vital for guiding the synthesis and preparation of PLLA for biomedical purposes. In this study, total internal reflection fluorescence microscopy was employed to investigate the adsorption of human serum albumin (HSA) on PLLA films with different molar masses. We found that molar mass affects HSA adsorption in such a way that it affects only the adsorption rate constants, but not the desorption rate constants. Additionally, we observed that HSA adsorption is spatially heterogeneous and exhibits many strong binding sites regardless of the molar mass of the PLLA films. We found that the free volume of PLLA plays a crucial role in determining its water uptake capacity and surface hydration, consequently impacting the adsorption of HSA.
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Affiliation(s)
- Kaixuan Lyu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yuehua Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Miaomiao Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jilin Tang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jidong Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Yanlong Liu
- Key Laboratory of Polymer Ecomaterials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Xinchao Bian
- Key Laboratory of Polymer Ecomaterials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Hongbo Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Dapeng Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
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3
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Fluorescent properties of amphi-PIC J-aggregates in the complexes with bovine serum albumin. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4
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Girmatsion M, Adhanom A, Gebremedhin H, Mahmud A, Xie Y, Cheng Y, Yu H, Yao W, Guo Y, Qian H. Ultrasensitive and selective detection of Hg 2+ using fluorescent phycocyanin in an aqueous system. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:886-895. [PMID: 34129421 DOI: 10.1080/10934529.2021.1935600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
Hg2+ toxicity is one of the most common chemical poisonings that occurs mainly from drinking polluted water. In the current work, Phycocyanin (PC) was exploited as a fluorescent sensor for sensitive and selective detection of Hg2+ in an aqueous system. PC-Hg2+ interaction was monitored using a spectro-fluorometer under different buffered solutions at pH values of 6,7,8,9, or 10 above the isoelectric point of PC (5.18). A remarkable decrease of PC fluorescence intensity was observed under Tris-buffer at pH 6 upon the addition of increasing Hg2+ concentrations (1-120 nM). Under the maintained experimental conditions, the current sensor showed a good linear relationship with R2 = 0.9971 and a limit of detection as low as 0.7 nM was achieved. In addition, a notable selectivity of Hg2+ over other nine heavy metals (Cu2+, Zn2+, Pb2+, Mg2+, Mn4+, Li+, Fe3+, Co2+, and Al3+) was achieved in the presence of 120 nM of each metal. Moreover, the current fluorescent detection assay was also tested in real samples of pond water, and recoveries as well as relative standard deviations within the acceptable limits were recorded.
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Affiliation(s)
- Mogos Girmatsion
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
| | - Awet Adhanom
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
- Ministry of Marine Resources, Quality control laboratory, Massawa, Eritrea
| | - Henok Gebremedhin
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
- Ministry of Marine Resources, Quality control laboratory, Massawa, Eritrea
| | - Abdu Mahmud
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
- Department of Marine Food and Biotechnology, Massawa College of Marine Science and Technology, Massawa, Eritrea
| | - Yunfei Xie
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yuliang Cheng
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Hang Yu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Weirong Yao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yahui Guo
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - He Qian
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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Ma Y, Tonelli M, Unsworth LD. Effect of carbamylation on protein structure and adsorption to self-assembled monolayer surfaces. Colloids Surf B Biointerfaces 2021; 203:111719. [PMID: 33831751 DOI: 10.1016/j.colsurfb.2021.111719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/25/2021] [Accepted: 03/22/2021] [Indexed: 11/19/2022]
Abstract
Protein adsorption research has primarily focused upon the effects of surface chemistry, with almost no emphasis on how changes to proteins that occur in various disease states may influence their adsorption. One such situation occurs with chronic kidney disease where, despite hemodialysis treatment, the retention of urea within the blood compartment leads to protein carbamylation. Protein carbamylation has been shown to alter the function and structure of proteins. This work is focused on understanding how different degrees of carbamylation affect the physicochemical properties (structure, charge, water interactions) of single proteins (α-lactalbumin, albumin, and fibrinogen) and their adsorption to self-assembled monolayers. It was found that, unlike its secondary structure, the protein's tertiary structure was significantly altered upon carbamylation. Also, compared to native proteins, an increase in carbamylation lead to an increase in the negative surface charge of the protein and a weaker hydration state of the protein. In order to study the effects of different types of neutral surfaces, of different surface-water properties, on protein adsorption both bare and alkanethiol modified (-CH3 or -OH end-groups) Au surfaces with were used as model surfaces. A significant decrease in adsorbed amounts of carbamylated fibrinogen and carbamylated α-lactalbumin, but not for carbamylated albumin, relative to native proteins was observed for both surfaces; suggesting that the increase in negative surface charge is more influential on adsorption than the change in hydration that occurs throughout the protein upon carbamylation. This data suggests that protein alterations that occur due to disease states have a significant effect on the overall protein structure and these changes affect their adsorption to surfaces.
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Affiliation(s)
- Yuhao Ma
- Department of Biomedical Engineering, University of Alberta, Edmonton, AB, T6G 2V2, Canada
| | - Marcello Tonelli
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Larry D Unsworth
- Department of Biomedical Engineering, University of Alberta, Edmonton, AB, T6G 2V2, Canada; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada.
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Malomuzh NP, Khorolskyi AV. Analyzing the Size of Albumin Macromolecules in Aqueous Solutions. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421020199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Seyedi S, Parvin P, Jafargholi A, Jelvani S, Shahabi M, Shahbazi M, Mohammadimatin P, Moafi A. Fluorescence properties of Phycocyanin and Phycocyanin-human serum albumin complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118468. [PMID: 32470806 DOI: 10.1016/j.saa.2020.118468] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 04/21/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
In this work, the fluorescence properties of Phycocyanin (PC) and the corresponding quenching effects are investigated in attendance of human serum albumin (HSA). At first, PC is excited at 532 nm using CW SHG Nd:YAG laser, then the emission wavelength, Stokes shift, quantum yield, extinction constant and self-quenching coefficient are obtained based on the modified Beer-Lambert equation. It is shown that a notable red shift appears in terms of PC concentration. According to the fluorescence spectra, the addition of HSA in PC solution leads to a significant reduction in the fluorescence signal via quenching events, however a lucid blue shift takes place in the same time. Stern-Volmer formalism is used to determine the quenching constant (KS), the number of binding sites (n) between PC and HSA as well as the association constant Ka for the purpose of facile transportation to the target in the context of drug delivery. Eventually, temperature dependent coefficients and corresponding spectral shifts are investigated over a wide range of temperatures at a couple of distinct PC concentrations to attest the dominant static quenching takes place. The rate of conjugate formations elevates at low temperatures leading to a certain blue shift. Furthermore, large KS is measured in the course of signal reduction, particularly at low PC populations. In fact, PC conjugation to HSA is essential interaction to enhance chemo drug transportation. Here, at the body temperature, the quenching coefficient decreases to facilitate the drug release. Moreover, the spectral shift of fluorescence emission can be useful for simultaneous monitoring and drug delivery treatment.
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Affiliation(s)
- S Seyedi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - P Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
| | - A Jafargholi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - S Jelvani
- Photonics and Quantum Technologies Research School, Nuclear Science and Technology Research Institute, P.O. Box 1439951113, Tehran, Iran
| | - M Shahabi
- High Institute for Research and Education in Transfusion Medicine, P.O. Box 14665-1157, Tehran, Iran
| | - M Shahbazi
- Gorgan University of Agricultural Sciences & Natural Resources, P.O. Box 4913815739, Gorgan, Iran
| | - P Mohammadimatin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - A Moafi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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8
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Kitayama Y, Isomura M. Molecularly imprinted polymer particles with gas-stimuli responsive affinity toward target proteins prepared using switchable functional monomer. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122781] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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Plisko TV, Bildyukevich AV, Burts KS, Ermakov SS, Penkova AV, Kuzminova AI, Dmitrenko ME, Hliavitskaya TA, Ulbricht M. One-Step Preparation of Antifouling Polysulfone Ultrafiltration Membranes via Modification by a Cationic Polyelectrolyte Based on Polyacrylamide. Polymers (Basel) 2020; 12:E1017. [PMID: 32365754 PMCID: PMC7284957 DOI: 10.3390/polym12051017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 12/03/2022] Open
Abstract
A novel method for one-step preparation of antifouling ultrafiltration membranes via a non-solvent induced phase separation (NIPS) technique is proposed. It involves using aqueous 0.05-0.3 wt.% solutions of cationic polyelectrolyte based on a copolymer of acrylamide and 2-acryloxyethyltrimethylammonium chloride (Praestol 859) as a coagulant in NIPS. A systematic study of the effect of the cationic polyelectrolyte addition to the coagulant on the structure, performance and antifouling stability of polysulfone membranes was carried out. The methods for membrane characterization involved scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), contact angle and zeta-potential measurements and evaluation of the permeability, rejection and antifouling performance in human serum albumin solution and surface water ultrafiltration. It was revealed that in the presence of cationic polyelectrolyte in the coagulation bath, its concentration has a major influence on the rate of "solvent-non-solvent" exchange and thus also on the rate of phase separation which significantly affects membrane structure. The immobilization of cationic polyelectrolyte macromolecules into the selective layer was confirmed by FTIR spectroscopy. It was revealed that polyelectrolyte macromolecules predominately immobilize on the surface of the selective layer and not on the bottom layer. Membrane modification was found to improve the hydrophilicity of the selective layer, to increase surface roughness and to change zeta-potential which yields the substantial improvement of membrane antifouling stability toward natural organic matter and human serum albumin.
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Affiliation(s)
- Tatiana V. Plisko
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia; (S.S.E.); (A.V.P.); (A.I.K.); (M.E.D.)
| | - Alexandr V. Bildyukevich
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganov str., 220072 Minsk, Belarus; (A.V.B.); (K.S.B.); (T.A.H.)
| | - Katsiaryna S. Burts
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganov str., 220072 Minsk, Belarus; (A.V.B.); (K.S.B.); (T.A.H.)
| | - Sergey S. Ermakov
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia; (S.S.E.); (A.V.P.); (A.I.K.); (M.E.D.)
| | - Anastasia V. Penkova
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia; (S.S.E.); (A.V.P.); (A.I.K.); (M.E.D.)
| | - Anna I. Kuzminova
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia; (S.S.E.); (A.V.P.); (A.I.K.); (M.E.D.)
| | - Maria E. Dmitrenko
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia; (S.S.E.); (A.V.P.); (A.I.K.); (M.E.D.)
| | - Tatiana A. Hliavitskaya
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganov str., 220072 Minsk, Belarus; (A.V.B.); (K.S.B.); (T.A.H.)
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II, and Center for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45141 Essen, Germany;
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V. Khorolskyi O, P. Malomuzh N. Macromolecular sizes of serum albumins in its aqueous solutions. AIMS BIOPHYSICS 2020. [DOI: 10.3934/biophy.2020017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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11
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Raghav A, Ahmad J, Alam K, Khan AU. New insights into non-enzymatic glycation of human serum albumin biopolymer: A study to unveil its impaired structure and function. Int J Biol Macromol 2017; 101:84-99. [DOI: 10.1016/j.ijbiomac.2017.03.086] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/13/2017] [Accepted: 03/15/2017] [Indexed: 12/31/2022]
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12
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Bruni R, Possenti P, Bordignon C, Li M, Ordanini S, Messa P, Rastaldi MP, Cellesi F. Ultrasmall polymeric nanocarriers for drug delivery to podocytes in kidney glomerulus. J Control Release 2017; 255:94-107. [PMID: 28395969 DOI: 10.1016/j.jconrel.2017.04.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 10/19/2022]
Abstract
We explored the use of new drug-loaded nanocarriers and their targeted delivery to the kidney glomerulus and in particular to podocytes, in order to overcome the failure of current therapeutic regimens in patients with proteinuric (i.e. abnormal amount of proteins in the urine) diseases. Podocytes are glomerular cells which are mainly responsible for glomerular filtration and are primarily or secondarily involved in chronic kidney diseases. Therefore, the possibility to utilise a podocyte-targeted drug delivery could represent a major breakthrough in kidney disease research, particularly in terms of dosage reduction and elimination of systemic side effects of current therapies. Four-arm star-shaped polymers, with/without a hydrophobic poly-ε-caprolactone core and a brush-like polyethylene glycol (PEG) hydrophilic shell, were synthesised by controlled/living polymerisation (ROP and ATRP) to allow the formation of stable ultrasmall colloidal nanomaterials of tuneable size (5-30nm), which are able to cross the glomerular filtration barrier (GFB). The effects of these nanomaterials on glomerular cells were evaluated in vitro. Nanomaterial accumulation and permeability in the kidney glomerulus were also assessed in mice under physiological and pathological conditions. Drug (dexamethasone) encapsulation was performed in order to test loading capacity, release kinetics, and podocyte repairing effects. The marked efficacy of these drug-loaded nanocarriers in repairing damaged podocytes may pave the way for developing a cell-targeted administration of new and traditional drugs, increasing efficacy and limiting side effects.
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Affiliation(s)
- Riccardo Bruni
- Fondazione CEN - European Centre for Nanomedicine, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Paolo Possenti
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy
| | - Carlotta Bordignon
- Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Min Li
- Fondazione CEN - European Centre for Nanomedicine, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Stefania Ordanini
- Fondazione CEN - European Centre for Nanomedicine, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Piergiorgio Messa
- Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Maria Pia Rastaldi
- Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy
| | - Francesco Cellesi
- Fondazione CEN - European Centre for Nanomedicine, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; Dipartimento di Chimica, Materiali ed Ingegneria Chimica "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; Renal Research Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
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Yu S, Schuchardt M, Tölle M, van der Giet M, Zidek W, Dzubiella J, Ballauff M. Interaction of human serum albumin with uremic toxins: a thermodynamic study. RSC Adv 2017. [DOI: 10.1039/c7ra02838e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Interaction of uremic toxins with HSA is studied by ITC and understood in terms of thermodynamic driving forces.
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Affiliation(s)
- Shun Yu
- Soft Matter and Functional Materials
- Helmholtz-Zentrum Berlin
- 14109 Berlin
- Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”
| | - Mirjam Schuchardt
- Medizinische Klinik für Nephrologie
- Universitätsmedizin Berlin
- Campus Benjamin Franklin
- 12203 Berlin
- Germany
| | - Markus Tölle
- Medizinische Klinik für Nephrologie
- Universitätsmedizin Berlin
- Campus Benjamin Franklin
- 12203 Berlin
- Germany
| | - Markus van der Giet
- Medizinische Klinik für Nephrologie
- Universitätsmedizin Berlin
- Campus Benjamin Franklin
- 12203 Berlin
- Germany
| | - Walter Zidek
- Medizinische Klinik für Nephrologie
- Universitätsmedizin Berlin
- Campus Benjamin Franklin
- 12203 Berlin
- Germany
| | - Joachim Dzubiella
- Soft Matter and Functional Materials
- Helmholtz-Zentrum Berlin
- 14109 Berlin
- Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”
| | - Matthias Ballauff
- Soft Matter and Functional Materials
- Helmholtz-Zentrum Berlin
- 14109 Berlin
- Germany
- Helmholtz Virtual Institute “Multifunctional Biomaterials for Medicine”
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14
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Tan L, He R, Li Y, Liang Y, Li H, Tang Y. Fabrication of a biomimetic adsorbent imprinted with a common specificity determinant for the removal of α- and β-amanitin from plasma. J Chromatogr A 2016; 1459:1-8. [DOI: 10.1016/j.chroma.2016.06.072] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 06/20/2016] [Accepted: 06/22/2016] [Indexed: 01/24/2023]
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15
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Cai Y, Schwartz DK. Influence of Protein Surface Coverage on Anomalously Strong Adsorption Sites. ACS APPLIED MATERIALS & INTERFACES 2016; 8:511-520. [PMID: 26651508 DOI: 10.1021/acsami.5b09459] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Serum albumin is commonly used as a blocking agent to reduce nonspecific protein adsorption in bioassays and biodevices; however, the details of this process remain poorly understood. Using single molecule techniques, we investigated the dynamics of human serum albumin (HSA) on four model surfaces as a function of protein concentration. By constructing super-resolution maps, identifying anomalously strong adsorption sites, and quantifying surface heterogeneity, we found that the concentration required for site blocking varied dramatically with surface chemistry. When expressed in terms of protein surface coverage, however, a more consistent picture emerged, where a significant fraction of strong sites were passivated at a fractional coverage of 10(-4). On fused silica (FS), "non-fouling" oligo (ethylene glycol) functionalized FS, and hydrophobically modified FS, a modest additional site blocking effect continued at higher coverage. However, on amine-functionalized surfaces, the surface heterogeneity exhibited a minimum at a coverage of ∼10(-4). Using intermolecular Förster resonance energy transfer (FRET), we determined that new anomalous strong sites were created at higher coverage on amine surfaces and that adsorption to these sites was associated with protein-protein interactions, i.e., surface-induced aggregation.
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Affiliation(s)
- Yu Cai
- Department of Chemical and Biological Engineering, University of Colorado Boulder , 596 UCB, Boulder, Colorado 80309-0596, United States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado Boulder , 596 UCB, Boulder, Colorado 80309-0596, United States
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16
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Beiranvand Z, Bani F, Kakanejadifard A, Laurini E, Fermeglia M, Pricl S, Adeli M. Anticancer drug delivery systems based on specific interactions between albumin and polyglycerol. RSC Adv 2016. [DOI: 10.1039/c5ra25463a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Since albumin is the main transporter and the most abundant protein in the blood, interactions between this protein and drug/gene nanocarriers are of great importance to ensure successful delivery to target tissue(s) in the body.
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Affiliation(s)
- Zahra Beiranvand
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
| | - Farhad Bani
- Institue of Biochemistry and Biophysic
- University of Tehran
- Iran
| | - Ali Kakanejadifard
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
| | - Erik Laurini
- Molecular Simulation Engineering (MOSE) Laboratory
- DEA
- University of Trieste
- 34127 Trieste
- Italy
| | - Maurizio Fermeglia
- Molecular Simulation Engineering (MOSE) Laboratory
- DEA
- University of Trieste
- 34127 Trieste
- Italy
| | - Sabrina Pricl
- Molecular Simulation Engineering (MOSE) Laboratory
- DEA
- University of Trieste
- 34127 Trieste
- Italy
| | - Mohsen Adeli
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
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17
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Madsen JB, Pakkanen KI, Duelund L, Svensson B, Hachem MA, Lee S. A simplified chromatographic approach to purify commercially available bovine submaxillary mucins (BSM). Prep Biochem Biotechnol 2015; 45:84-99. [PMID: 24547990 DOI: 10.1080/10826068.2014.887583] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
In this study, a simple purification protocol is developed to reduce the bovine serum albumin (BSA) content in commercially available bovine submaxillary mucin (BSM). This involved purification of the BSM by one-column anion-exchange chromatography protocol resulting in BSM with greatly reduced BSA content and homogeneously distributed size, and in a high yield of ∼43% from BSM as received from the manufacturer. The purity and composition of commercially acquired BSM were assessed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and mass spectrometry, which verified that BSA is the most abundant nonmucinous protein component. The purification effect was evident from a significantly altered circular dichroism (CD) spectrum of BSM after anion-exchange chromatography.
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Affiliation(s)
- Jan Busk Madsen
- a Department of Mechanical Engineering , Technical University of Denmark , Kgs. Lyngby , Denmark
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18
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Ishtikhar M, Rabbani G, Khan S, Khan RH. Biophysical investigation of thymoquinone binding to ‘N’ and ‘B’ isoforms of human serum albumin: exploring the interaction mechanism and radical scavenging activity. RSC Adv 2015. [DOI: 10.1039/c4ra09892g] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thymoquinone more strongly interacts with the ‘N’ isoform in comparison to the ‘B’ isoform of HSA and also increases its thermal stability but the antioxidant activity is significantly higher at the ‘B’ isoform of HSA.
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Affiliation(s)
- Mohd Ishtikhar
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Gulam Rabbani
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202002
- India
| | - Shawez Khan
- Department of Computer Science
- Jamia Millia Islamia
- New Delhi-110025
- India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202002
- India
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19
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Nikogeorgos N, Madsen JB, Lee S. Influence of impurities and contact scale on the lubricating properties of bovine submaxillary mucin (BSM) films on a hydrophobic surface. Colloids Surf B Biointerfaces 2014; 122:760-766. [PMID: 25189473 DOI: 10.1016/j.colsurfb.2014.08.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 08/05/2014] [Accepted: 08/13/2014] [Indexed: 01/01/2023]
Abstract
Lubricating properties of bovine submaxillary mucin (BSM) on a compliant, hydrophobic surface were studied as influenced by impurities, in particular bovine serum albumin (BSA), at macro and nanoscale contacts by means of pin-on-disk tribometry and friction force microscopy (FFM), respectively. At both contact scales, the purity of BSM and the presence of BSA were quantitatively discriminated. The presence of BSA was responsible for higher frictional forces observed from BSM samples containing relatively larger amount of BSA. But, the mechanisms contributing to higher friction forces by BSA were different at different contact scales. At the macroscale contact, higher friction forces were caused by faster and dominant adsorption of BSA into the contacting area under a continuous cycle of desorption and re-adsorption of the macromolecules from tribostress. Nevertheless, all BSMs lowered the interfacial friction forces due to large contact area and a large number of BSM molecules in the contact area. At the nanoscale contact, however, no significant desorption of the macromolecules is expected in tribological contacts because of too small contact area and extremely small number of BSM molecules involved in the contact area. Instead, increasingly higher friction forces with increasing amount of BSA in BSM layer are attributed to higher viscosity caused by BSA in the layer. Comparable size of AFM probes with BSM molecules allowed them to penetrate through the BSM layers and to scratch on the underlying substrates, and thus induced higher friction forces compared to the sliding contact on bare substrates.
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Affiliation(s)
- Nikolaos Nikogeorgos
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Jan Busk Madsen
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
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20
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Musante L, Saraswat M, Ravidà A, Byrne B, Holthofer H. Recovery of urinary nanovesicles from ultracentrifugation supernatants. Nephrol Dial Transplant 2013; 28:1425-1433. [DOI: 10.1093/ndt/gfs564] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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21
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Reichenwallner J, Hinderberger D. Using bound fatty acids to disclose the functional structure of serum albumin. Biochim Biophys Acta Gen Subj 2013; 1830:5382-93. [PMID: 23643928 DOI: 10.1016/j.bbagen.2013.04.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 11/16/2022]
Abstract
BACKGROUND Serum albumin is a major transport protein in mammals and is known to have at least seven binding sites for long-chain fatty acids (FAs). SCOPE OF REVIEW We have devised a new electron paramagnetic resonance (EPR) spectroscopic approach to gain information on the functional structure of serum albumin in solution in a "coarse-grained" manner from the ligands' point of view. Our approach is based on using spin labeled (paramagnetic) stearic acids self-assembled with albumin and subsequent nanoscale distance measurements between the FAs using double electron-electron resonance spectroscopy (DEER). Simple continuous wave (CW) EPR spectroscopy, which allows for quantification of bound ligands, complements our studies. MAJOR CONCLUSIONS Based on DEER nanoscale distance measurements, the functional solution structure of human serum albumin (HSA) has remarkably been found to have a much more symmetric distribution of entry points to the FA binding sites than expected from the crystal structure, indicating increased surface flexibility and plasticity for HSA in solution. In contrast, for bovine serum albumin (BSA), the entry point topology is in good agreement with that expected from the crystal structure of HSA. Changes in the solution structures between albumins can hence be revealed and extended to more albumins to detect functional differences at the nanoscale. Going beyond fundamental structural studies, our research platform is also excellently suited for general studies of protein-solvent interactions, temperature effects and ligand binding. GENERAL SIGNIFICANCE We discuss how our research platform helps illuminate protein dynamics and function and can be used to characterize albumin-based hybrid materials. This article is part of a Special Issue entitled Serum Albumin.
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Affiliation(s)
- Jörg Reichenwallner
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany; Institute for Pharmacy and Biochemistry, Johannes Gutenberg-Universität Mainz, Johann-Joachim-Becher-Weg 30, D-55128 Mainz, Germany
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22
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Zergani F, Roohizadeh R, Dayer MR, Namdari M, Farokhnia A, Sobhany Y, Ghayour O. In Silico Study of Global Structure of Human Serum Albumin. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/19430892.2012.739454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Krayukhina E, Uchiyama S, Fukui K. Effects of rotational speed on the hydrodynamic properties of pharmaceutical antibodies measured by analytical ultracentrifugation sedimentation velocity. Eur J Pharm Sci 2012; 47:367-74. [PMID: 22728396 DOI: 10.1016/j.ejps.2012.06.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 06/04/2012] [Accepted: 06/08/2012] [Indexed: 11/30/2022]
Abstract
Analytical ultracentrifugation sedimentation velocity (AUC-SV) has recently become one of the most important tools for the measurement of hydrodynamic properties of proteins. Although a number of studies using AUC-SV as applied to pharmaceutical antibodies have been conducted, the effect of rotational speed on molecular properties has not been systematically examined. The present study aimed to elucidate the influence of rotational speed on the hydrodynamic parameters of pharmaceutical antibodies. A monoclonal and a polyclonal antibody were studied by using AUC-SV at 5 different rotor speeds, and the acquired data were analyzed either by using the computer programs SEDFIT or UltraScan. The frictional ratio of the studied antibodies decreased at high rotor speeds, resulting in underestimation of molecular weight. The frictional ratio value of the monoclonal antibody measured at the low rotor speed was consistent with that of human immunoglobulin G1 computed from its three-dimensional structure. The best agreement between the measured molecular weight and the value calculated from the antibody sequence was achieved at the lower rotor speed. Similar to the results obtained using antibodies, AUC-SV analysis of human serum albumin revealed that the frictional ratio and apparent molecular weight behave in a speed-dependent manner. We deduced that the findings were mainly attributable to the hydrostatic pressure in the analytical ultracentrifuge. The current study implies that rotor speed should be carefully considered in antibody studies using AUC-SV.
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Affiliation(s)
- Elena Krayukhina
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
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24
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Wells MA, Abid A, Kennedy IM, Barakat AI. Serum proteins prevent aggregation of Fe2O3 and ZnO nanoparticles. Nanotoxicology 2011; 6:837-46. [PMID: 22149273 DOI: 10.3109/17435390.2011.625131] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Aggregation of metal oxide nanoparticles in aqueous media complicates interpretation of in vitro studies of nanoparticle-cell interactions. We used dynamic light scattering to investigate the aggregation dynamics of iron oxide and zinc oxide nanoparticles. Our results show that iron oxide particles aggregate more readily than zinc oxide particles. Pretreatment with serum stabilises iron oxide and zinc oxide nanoparticles against aggregation. Serum-treated iron oxide is stable only in pure water, while zinc oxide is stable in water or cell culture media. These findings, combined with zeta potential measurements and quantification of proteins adsorbed on particle surface, suggest that serum stabilisation of iron oxide particles occurs primarily through protein adsorption and resulting net surface charge. Zinc oxide stabilisation, however, also involves steric hindrance of particle aggregation. Fluid shear at levels used in flow experiments breaks up iron oxide particle aggregates. These results enhance our understanding of nanoparticle aggregation and its consequences for research on the biological effects of nanomaterials.
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Affiliation(s)
- Mark A Wells
- Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA
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25
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Tripisciano C, Kozynchenko OP, Linsberger I, Phillips GJ, Howell CA, Sandeman SR, Tennison SR, Mikhalovsky SV, Weber V, Falkenhagen D. Activation-dependent adsorption of cytokines and toxins related to liver failure to carbon beads. Biomacromolecules 2011; 12:3733-40. [PMID: 21842874 DOI: 10.1021/bm200982g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the course of severe pathological conditions, such as acute liver failure and sepsis, toxic metabolites and mediators of inflammation are released into the patient's circulation. One option for the supportive treatment of these conditions is plasmapheresis, in which plasma, after being separated from the cellular components of the blood, is cleansed by adsorption of harmful molecules on polymers or activated carbon. In this work, the adsorption characteristics of activated carbon beads with levels of activation ranging from 0 to 86% were assessed for both hydrophobic compounds accumulating in liver failure (bilirubin, cholic acid, phenol and tryptophan) and cytokines (tumor necrosis factor α and interleukin-6). Progressive activation resulted in significant gradual reduction of both bulk density and mean particle size, in an increase in the specific surface area, and to changes in pore size distribution with progressive broadening of micropores. These structural changes went hand in hand with enhanced adsorption of small adsorbates, such as IL-6 and cholic acid and, to a lesser extent, also of large molecules, such as TNF-α.
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26
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Abuin E, Lissi E, Ahumada M, Calderón C. Effect of Human Serum Albumin on the Kinetics of N-glutaryl-L-phenylalanine p-nitroanilide Hydrolysis Catalyzed by α-Chymotrypsin. Protein J 2011; 30:143-7. [DOI: 10.1007/s10930-011-9315-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Wang H, Li Y, Chung TS. A fine match between the stereoselective ligands and membrane pore size for enhanced chiral separation. AIChE J 2009. [DOI: 10.1002/aic.11858] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Architectures of Multivalent Glycomimetics for Probing Carbohydrate–Lectin Interactions. GLYCOSCIENCE AND MICROBIAL ADHESION 2009; 288:183-65. [DOI: 10.1007/128_2008_30] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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29
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Cheema MA, Taboada P, Barbosa S, Castro E, Siddiq M, Mosquera V. Energetics and Conformational Changes upon Complexation of a Phenothiazine Drug with Human Serum Albumin. Biomacromolecules 2007; 8:2576-85. [PMID: 17592874 DOI: 10.1021/bm070354j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interactions and complexation process of the amphiphilic phenothiazine fluphenazine hydrochloride with human serum albumin in aqueous buffered solutions of pH 3.0 and 7.4 have been examined by zeta-potential, isothermal titration calorimetry (ITC), UV-vis spectroscopy, and dynamic light scattering (DLS) techniques with the aim of analyzing the effect of hydrophobic and electrostatic forces on the complexation process and the alteration of protein conformation upon binding. Thus, the energetics and stoichiometry of the binding process were derived from ITC data. The enthalpies of binding obtained are small and exothermic, so the Gibbs energies of binding are dominated by large increases in entropy, consistent with hydrophobic interactions at a acidic pH. However, at physiological pH, binding to the first class of binding sites is dominated by an enthalpic contribution due to the existence of electrostatic interactions and probably some hydrogen bonding. Binding isotherms were obtained from microcalorimetric data by using a theoretical model based on the Langmuir isotherm. zeta-Potential data showed a reversal in the sign of the protein charge at pH 7.4, as a consequence of the binding of the drug to the protein. Gibbs energies of drug binding per mole of drug were also derived from zeta-potential data. On the other hand, binding of the phenothiazine that causes a conformational transition on the protein structure was followed as a function of drug concentration using UV-vis spectroscopy, and the data were analyzed to obtain the Gibbs energy of the transition in water (deltaG(degree)w) and in a hydrophobic environment (deltaG(degree)hc). Finally, the population distribution of the different species in solution and the size of the complexes were analyzed through dynamic light scattering. The existence of an aggregation process of drug/protein complexes, as a consequence of the expanded structure of the protein induced by the drug and subsequent further binding, is in agreement with ITC data. In addition, detection of drug aggregates at concentrations below the drug critical micelle concentration was also detected by this technique.
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Affiliation(s)
- Mohammad Arif Cheema
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
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30
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A laser light scattering study of the interaction between human serum albumin and ampicillin sodium. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/s11426-006-0332-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Barbosa S, Taboada P, Mosquera V. Analysis of the interactions between human serum albumin/amphiphilic penicillin in different aqueous media: an isothermal titration calorimetry and dynamic light scattering study. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.10.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Taboada P, Gutiérrez-Pichel M, Mosquera V. Effects of the molecular structure of two amphiphilic antidepressant drugs on the formation of complexes with human serum albumin. Biomacromolecules 2005; 5:1116-23. [PMID: 15132707 DOI: 10.1021/bm049919r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interactions of two amphiphilic antidepressant drugs, imipramine and desipramine hydrochlorides, with the blood protein human serum albumin (HSA) were investigated to gain an understanding of the effects of drug molecular structure on the complex formation of drug-protein molecules. To elucidate the mechanisms of such effects, the protein-antidepressant interactions in aqueous buffered solutions of pH 3.0 and 5.5 (isoelectric point of HSA = 4.9) were investigated using conductivity, zeta potential, and dynamic light scattering. An increase of the critical micelle concentration of both antidepressants was detected as a consequence of extensive binding to the protein. From zeta-potential measurements, the Gibbs energies of adsorption of the drugs onto the protein were derived using the proposed models of Kayes and Ottewill and Watanabe. Measurements of the hydrodynamic radii of HSA-antidepressant complexes as a function of the drug concentration have shown a gradual increase of size of a saturation rather than a denaturation process of the protein. A larger drug adsorption at pH 5.5 than at pH 3.0 was also observed, as a consequence of a more important specific binding at the former pH.
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Affiliation(s)
- Pablo Taboada
- Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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33
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Birla L, Cristian AM, Hillebrand M. Absorption and steady state fluorescence study of interaction between eosin and bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2004; 60:551-6. [PMID: 14747078 DOI: 10.1016/s1386-1425(03)00261-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The interaction between eosin and bovine serum albumin in buffer solution, at pH 7.4 has been studied by means of absorption and emission spectroscopy. Applying the Scatchard model to the absorbance data a non-linear plot was obtained, reflecting a complex process. In the fluorescence spectra, two distinct effects were observed. Upon increasing the protein-dye ratio to about 0.60, the intensity of eosin emission band (544 nm) decreases to approximately 30% of its initial value. During this quenching, a small red shift is noticed. The data were rationalized in terms of two classes of binding sites. At higher protein concentrations, a new band localized at 556 nm appears, which could be assigned to a new fluorescent species. This second process corresponds to a 1:1 binding.
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Affiliation(s)
- Liliana Birla
- Laboratory of Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Bd, Regina Elisabeta, 70346 Bucharest, Romania
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34
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Taboada P, Gutiérrez-Pichel M, Barbosa S, Mosquera V. Determination of the interactions between an antidepressant amphiphilic drug and human serum albumin. Phys Chem Chem Phys 2004. [DOI: 10.1039/b407645a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Gun'ko VM, Klyueva AV, Levchuk YN, Leboda R. Photon correlation spectroscopy investigations of proteins. Adv Colloid Interface Sci 2003; 105:201-328. [PMID: 12969646 DOI: 10.1016/s0001-8686(03)00091-5] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Physical principles of photon correlation spectroscopy (PCS), mathematical treatment of the PCS data (converting autocorrelation functions to distribution functions or average characteristics), and PCS applications to study proteins and other biomacromolecules in aqueous media are described and analysed. The PCS investigations of conformational changes in protein molecules, their aggregation itself or in consequence of interaction with other molecules or organic (polymers) and inorganic (e.g. fumed silica) fine particles as well as the influence of low molecular compounds (surfactants, drugs, salts, metal ions, etc.) reveal unique capability of the PCS techniques for elucidation of important native functions of proteins and other biomacromolecules (DNA, RNA, etc.) or microorganisms (Escherichia coli, Pseudomonas putida, Dunaliella viridis, etc.). Special attention is paid to the interaction of proteins with fumed oxides and the impact of polymers and fine oxide particles on the motion of living flagellar microorganisms analysed by means of PCS.
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Affiliation(s)
- Vladimir M Gun'ko
- Institute of Surface Chemistry, 17 General Naumov Street, Kiev 03164, Ukraine.
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36
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Leis D, Barbosa S, Attwood D, Taboada P, Mosquera V. Influence of the pH on the Complexation of an Amphiphilic Antidepressant Drug and Human Serum Albumin. J Phys Chem B 2002. [DOI: 10.1021/jp020761j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Yamaguchi T, Adachi K. Hemoglobin equilibrium analysis by the multiangle laser light-scattering method. Biochem Biophys Res Commun 2002; 290:1382-7. [PMID: 11820774 DOI: 10.1006/bbrc.2002.6362] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dimer-tetramer and monomer-dimer-tetramer equilibria of tetrameric hemoglobins and their single chains in the CO form, respectively, were evaluated using the microbatch multiangle light-scattering (MALS) analysis system. The molecular weights of human Hb A and Hb F in the CO form were dependent on concentration. The dissociation constants to dimers of Hb A and Hb F were 2.58 x 10(-6) and 0.66 x 10(-6), respectively. Equilibration of single globin chains, including alpha, beta, and gamma chains, was also evaluated by the same method. The dissociation constants of alpha-chain dimers to monomers, of beta-chain tetramers to monomers, and of gamma-chain tetramers to dimers were 14 x 10(-6), 25 x 10(-17), and 6.86 x 10(-6) M, respectively. These results indicate that the MALS analysis system can not only determine molecular weight but also characterize protein-protein interactions of multi-subunit proteins.
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Affiliation(s)
- Takamasa Yamaguchi
- Division of Hematology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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38
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Ruso JM, Taboada P, Varela LM, Attwood D, Mosquera V. Adsorption of an amphiphilic penicillin onto human serum albumin: characterisation of the complex. Biophys Chem 2001; 92:141-53. [PMID: 11527586 DOI: 10.1016/s0301-4622(01)00196-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The complex formed by the interaction of the amphiphilic penicillin drug nafcillin and human serum albumin (HSA) in water at 25 degrees C has been characterised using a range of physicochemical techniques. Measurements of the solution conductivity and the electrophoretic mobility of the complexes have shown an ionic adsorption of the drug on the protein surface leading to a surface saturation at a nafcillin concentration of 0.012 mmol kg(-1) and subsequent formation of drug micelles in solutions of higher nafcillin concentration. Measurements of the size of the complex and the thickness of the adsorbed layer by static and dynamic light scattering have shown a gradual change in hydrodynamic radius of the complex with increasing drug concentration typical of a saturation rather than a denaturation process, the magnitude of the change being insufficient to account for any appreciable extension or unfolding of the HSA molecule. The interaction potential between the HSA/nafcillin complexes, and the stability of the complexes were determined from the dependence of diffusion coefficients on protein concentration by application of the DLVO colloidal stability theory. The results indicate decreasing stability of the colloidal dispersion of the drug/protein complexes with an increase in the concentration of added drug.
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Affiliation(s)
- J M Ruso
- Departamento de Física Aplicada, Grupo de Física de Coloides y Polímeros, Facultad de Física, Universidad de Santiago de Compostela, E-15706, Santiago de Compostela, Spain
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Song D, Forciniti D. Effects of Cosolvents and pH on Protein Adsorption on Polystyrene Latex: A Dynamic Light Scattering Study. J Colloid Interface Sci 2000; 221:25-37. [PMID: 10623449 DOI: 10.1006/jcis.1999.6560] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dynamic light scattering was used to study the adsorption of two proteins with different surface properties (IgG and HSA) on negatively charged polystyrene latex. The proteins were adsorbed from water and from water/methanol and water/glycerol mixtures at various pH. Some striking differences between the adsorption behaviors of the proteins were observed. Whereas the thickness of the adsorbed layer of HSA was extremely sensitive to pH and solvent composition, that of IgG was not. IgG mainly showed an end-on orientation on polystyrene whereas several different surface orientations are suggested for HSA under different conditions. The addition of methanol inhibited the adsorption of HSA on the latex, but it did not affect the adsorption of IgG. In contrast, the addition of glycerol increased the thickness of the adsorbed layers of both proteins. So, the orientation of IgG on the latex is insensitive to pH but is a function of the kind of solvent whereas both pH and solvent strongly affect the adsorption of HSA. This is a puzzling result since both cosolvents should equally affect the adsorption of both proteins if the dominant forces for adsorption are the same. Therefore, we concluded that, whereas hydrophobic interactions are the dominant force in the adsorption behavior of HSA, van der Waals forces are the main forces involved in the attachment of IgG to the lattices. Copyright 2000 Academic Press.
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Affiliation(s)
- D Song
- Department of Chemical Engineering, University of Missouri-Rolla, Rolla, Missouri, 65401
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