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Pham PC, Taylor M, Nguyen GTH, Beltran J, Bennett JL, Ho J, Donald WA. Binding of Per- and Polyfluoroalkyl Substances to β-Lactoglobulin from Bovine Milk. Chem Res Toxicol 2024; 37:757-770. [PMID: 38625865 DOI: 10.1021/acs.chemrestox.4c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are known for their high environmental persistence and potential toxicity. The presence of PFAS has been reported in many dairy products. However, the mechanisms underlying the accumulation of PFAS in these products remain unclear. Here, we used native mass spectrometry and molecular dynamics simulations to probe the interactions between 19 PFAS of environmental concern and two isoforms of the major bovine whey protein β-lactoglobulin (β-LG). We observed that six of these PFAS bound to both protein isoforms with low- to mid-micromolar dissociation constants. Based on quantitative, competitive binding experiments with endogenous ligands, PFAS can bind orthosterically and preferentially to β-LG's hydrophobic ligand-binding calyx. β-Cyclodextrin can also suppress binding of PFAS to β-LG owing to the ability of β-cyclodextrin to directly sequester PFAS from solution. This research sheds light on PFAS-β-LG binding, suggesting that such interactions could impact lipid-fatty acid transport in bovine mammary glands at high PFAS concentrations. Furthermore, our results highlight the potential use of β-cyclodextrin in mitigating PFAS binding, providing insights toward the development of strategies to reduce PFAS accumulation in dairy products and other biological systems.
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Affiliation(s)
- P Chi Pham
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Mackenzie Taylor
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Giang T H Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jeunesse Beltran
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jack L Bennett
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Junming Ho
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - William A Donald
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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2
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Lamichhane HB, Arrigan DWM. Modulating the ion-transfer electrochemistry of perfluorooctanoate with serum albumin and β-cyclodextrin. Analyst 2024; 149:2647-2654. [PMID: 38546701 DOI: 10.1039/d3an02164e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are durable synthetic pollutants that persist in the environment and resist biodegradation. Ion-transfer electrochemistry at aqueous-organic interfaces is a simple strategy for the detection of ionised PFAS. Herein, we investigate the modulation of the ion transfer voltammetry of perfluorooctanoate (PFOA) at liquid-liquid micro-interface arrays by aqueous phase bovine serum albumin (BSA) or β-cyclodextrin (β-CD) and examine the determination of association constants for these binding interactions. By tracking the ion transfer current due to ionised, uncomplexed PFOA as a function of BSA or β-CD concentration, titration curves are produced. Fitting of a binding isotherm to these data provides the association constants. The association constant of PFOA with the BSA determined in this way was ca. 105 M-1 assuming a 1 : 1 binding. Likewise, the association constant for PFOA with β-CD was ca. 104 M-1 for a 1 : 1 β-CD-PFOA complex. Finally, the simultaneous effect of both BSA and β-CD on the ion transfer voltammetry of PFOA was studied, showing clearly that PFOA bound to BSA is released (de-complexed) upon addition of β-CD. The results presented here show ion transfer voltammetry as a simple strategy for the study of molecular and biomolecular binding of ionised PFAS and is potentially useful in understanding the affinity of different PFAS with aqueous phase binding agents such as proteins and carbohydrates.
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Affiliation(s)
- Hum Bahadur Lamichhane
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia.
| | - Damien W M Arrigan
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia.
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3
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John R, Aravindakumar CT, Aravind UK. Delineating the cascade of molecular events in protein aggregation triggered by Glyphosate, aminomethylphosphonic acid, and Roundup in serum albumins. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132158. [PMID: 37567142 DOI: 10.1016/j.jhazmat.2023.132158] [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: 04/18/2023] [Revised: 07/14/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023]
Abstract
The molecular basis of protein unfolding on exposure to the widely used herbicide, Glyphosate (GLY), its metabolite aminomethylphosphonic acid (AMPA), and the commercial formulation Roundup have been probed using human and bovine serum albumins (HSA and BSA). Protein solutions were exposed to chemical stress at set experimental conditions. The study proceeds with spectroscopic and imaging tools. Steady-state and time-resolved fluorescence (TRF) measurements indicated polarity changes with the possibility of forming a ground-state complex. Atomic force microscopy imaging results revealed the formation of fibrils from BSA and dimer, trimer, and tetramer forms of oligomers from HSA under the chemical stress of GLY. In the presence of AMPA, serum albumins (SAs) form a compact network of oligomers. The compact network of oligomers was transformed into fibrils for HSA with increasing concentrations of AMPA. In contrast, Roundup triggered the formation of amorphous aggregates from SAs. Analysis of the Raman amide I band of all aggregates showed a significant increase in antiparallel β-sheet fractions at the expense of α-helix. The highest percentage, 24.6%, of antiparallel β-sheet fractions was present in amorphous aggregate formed from HSA under the influence of Roundup. These results demonstrated protein unfolding, which led to the formation of oligomers and fibrils.
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Affiliation(s)
- Reshmi John
- Inter University Instrumentation Centre (IUIC), India
| | - Charuvila T Aravindakumar
- Inter University Instrumentation Centre (IUIC), India; School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India.
| | - Usha K Aravind
- School of Environmental Studies, Cochin University of Science and Technology (CUSAT), Kochi 682022, Kerala, India.
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4
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Perera ND, Betancourt J, Miksovska J, O'Shea KE. Detail study on the interaction between perfluorooctanoic acid (PFOA) with human hemoglobin (Hb). Curr Res Toxicol 2023; 5:100130. [PMID: 37822784 PMCID: PMC10563006 DOI: 10.1016/j.crtox.2023.100130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023] Open
Abstract
Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) are often referred to as legacy perfluoroalkyl substances (PFAS). Human exposure to PFAS leads to severe negative health impacts including cancers, infertility, and dysfunction in the kidneys. Steady-state absorbance, fluorescence, and circular dichroism (CD) methods were used to study the interactions between PFOA and Hb. The results demonstrate the presence of multiple PFOA binding sites on the Hb protein. The detailed analysis of the ferric hemoglobin protein (met Hb) absorbance data as a function of PFOA concentration indicates the presence of at least two binding sites with equilibrium dissociation constants of 0.8 ± (0.2) × 10-6 M and 63 ± (15) × 10-5 M. A competitive binding study with 1,8-ANS showed PFOA can bind to the same binding site as 1,8-ANS on the Hb protein. The titration curve for PFOA binding to Hb in its CO bound form (CO-Hb) yields a single equilibrium dissociation constant of 139 ± (20) × 10-6 M. PFOA binding at low concentrations occurs at the high-affinity sites leading to the destabilization of the protein structure as reflected by changes in the CD spectrum. PFOA interactions with Hb also interfere with the kinetics of CO association to this protein. The rate for CO association to Hb increases at low PFOA concentrations, whereas at elevated PFOA concentrations, the ligand association is biphasic as a new kinetic process with a different rate constant was observed. Overall, this study provides a detailed explanation of PFOA-induced structural and conformational changes to the Hb protein based on the spectroscopy data.
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Affiliation(s)
- N.L. Dilani Perera
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8 Street, Miami, FL 33199, United States
| | - Jovany Betancourt
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8 Street, Miami, FL 33199, United States
| | - Jaroslava Miksovska
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8 Street, Miami, FL 33199, United States
| | - Kevin E. O'Shea
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8 Street, Miami, FL 33199, United States
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5
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Yang YD, Tian R, Lu N. Binding of serum albumin to perfluorooctanoic acid reduced cytotoxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 876:162738. [PMID: 36906033 DOI: 10.1016/j.scitotenv.2023.162738] [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: 01/07/2023] [Revised: 03/03/2023] [Accepted: 03/05/2023] [Indexed: 06/18/2023]
Abstract
With the ubiquitous applications of perfluorinated compounds such as perfluorooctanoic acid (PFOA) in industrial and commercial products, the toxicity of these engineered materials in environmental and public health is received growing attention. As a typical organic pollutant, PFOA has been extensively found in wildlife and human bodies, and can preferentially bind to serum albumin in vivo. However, the importance of protein-PFOA interactions on the cytotoxicity of PFOA could not be stressed enough. In this study, we used both experimental and theoretical approaches, to investigate the interactions of PFOA with bovine serum albumin (BSA, the most abundant protein in blood). It was found that PFOA could mainly interact with Sudlow site I of BSA to form BSA-PFOA complex, in which van der Waals forces and hydrogen bonds played dominant roles. Moreover, the strong binding of BSA could greatly alter the cellular uptake and distribution of PFOA in human endothelial cells, and result in the decreases of reactive oxygen species formation and cytotoxicity for these BSA-coated PFOA. Consistently, the addition of fetal bovine serum into cell culture medium also significantly mitigated PFOA-induced cytotoxicity, which was attributed to the extracellular complexation between PFOA and serum proteins. Altogether, our study demonstrates that the binding of serum albumin to PFOA could reduce its toxicity by affecting the cellular responses.
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Affiliation(s)
- Ya-Di Yang
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China
| | - Rong Tian
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China
| | - Naihao Lu
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China.
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6
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Perera NLD, Miksovska J, O'Shea KE. Elucidation of specific binding sites and extraction of toxic Gen X from HSA employing cyclodextrin. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:127765. [PMID: 34838360 DOI: 10.1016/j.jhazmat.2021.127765] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
The presence of per and poly-fluoroalkyl substances (PFAS), commonly referred to as forever chemicals, in aquatic systems is a serious global health problem. While the remediation of PFAS from aqueous media has been extensively investigated, their interactions with and removal from biological systems have received far less attention. We report herein structural alterations to human serum albumin (HSA) upon addition of perfluoro(2-methyl-3-oxahexanoic) acid (Gen X) monitored by changes to the fluorescence and circular dichroism (CD) spectra of HSA. The equilibrium association constant for Gen X binding to HSA is 7( ± 1) × 103 M-1 determined from changes in HSA fluorescence emission data during titration. Site-specific HSA binding fluorophores, 8-anilinonaphthalene-1-sulfonic acid (1,8-ANS), warfarin and dansyl-L-proline were used to investigate the specific binding sites of Gen X on HSA. A competitive displacement study yields association constants for Gen X to HSA at the 1,8-ANS, warfarin, and dansyl-L-proline binding sites to be 6.25 ( ± 0.5) × 104 M-1, 1.1 × 106 M-1, and 2.5( ± 0.2) × 109 M-1 respectively. Addition of β-cyclodextrin (β-CD) and heptakis(6-deoxy-6-amino)-β-cyclodextrin heptahydrochloride to the HSA:Gen X complex leads to the effective extraction of Gen X from the complex with the return of HSA in its native form. Gen X also leads to displacement of site-specific binding fluorophores bound to HSA, while subsequent addition of β-CD extracts Gen X from HSA with the return of the characteristic fluorescence of the HSA bound site-specific agent. These results illustrate the strong and specific binding sites of Gen X on HSA and demonstrate the principles for the potential application of β-CD for the remediation of PFAS from biological systems.
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Affiliation(s)
- N L Dilani Perera
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th street, Miami, FL 33199, United States
| | - Jaroslava Miksovska
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th street, Miami, FL 33199, United States
| | - Kevin E O'Shea
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th street, Miami, FL 33199, United States.
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7
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Zhang W, Liu Z, Zhou Y, Lai C, Sun B, He M, Zhai Z, Wang J, Wang Q, Wang X, Wang F, Pan Y. Elucidating the molecular mechanisms of perfluorooctanoic acid-serum protein interactions by structural mass spectrometry. CHEMOSPHERE 2022; 291:132945. [PMID: 34798108 DOI: 10.1016/j.chemosphere.2021.132945] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/08/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a persistent environmental pollutant and will continually accumulate in blood due to its chemical inertness and strong interaction with serum proteins, especially serum albumin (SA), inducing highly adverse health risks. However, the molecular mechanisms of dynamic interactions between PFOA with serum proteins remain unclear, limiting the development of potential therapeutic strategies. Herein, we developed an integrated structural strategy to systematically profile the molecular details of dynamic interactions among PFOA, SA, and β-cyclodextrin (β-CD) by combing native mass spectrometry (nMS), lysine reactivity profiling (LRP), and molecular docking (MD) simulation. The SA site 1, site 2 pockets, and cleft nearby are observed as the primary interaction regions of PFOA. Further, β-CD can disrupt the PFOA combinations with bovine SA regions around sites Lys20, Lys280, Lys350, and Lys431-Lys439, with an overall reversing efficiency of about 26% at an identical concentration to PFOA. The interactome of PFOA with complex human serum proteins is globally profiled with molecular interaction details, including human serum albumin, apolipoprotein A-I, alpha-2-macroglobulin, and complement C3. Our results reveal molecular insights into the detail of the interaction between PFOA and serum proteins, beneficial to understanding PFOA toxicology.
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Affiliation(s)
- Wenxiang Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China; CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Zheyi Liu
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Ye Zhou
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Can Lai
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Binwen Sun
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Min He
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ziyang Zhai
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jian Wang
- The Second Hospital of Dalian Medical University, Dalian, 116023, China
| | - Qi Wang
- The Second Hospital of Dalian Medical University, Dalian, 116023, China
| | - Xian Wang
- Key Laboratory of Analytical Chemistry of State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Fangjun Wang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yuanjiang Pan
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, China.
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8
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Mondal M, Basak S, Roy D, Saha S, Ghosh B, Ali S, Ghosh NN, Dutta A, Kumar A, Roy MN. Cyclic oligosaccharides as controlled release complexes with food additives (TZ) for reducing hazardous effects. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Wei X, Wang Q, Liu C. Nanopore sensing of γ-cyclodextrin induced host-guest interaction to reverse the binding of perfluorooctanoic acid to human serum albumin. Proteomics 2021; 22:e2100058. [PMID: 34648224 DOI: 10.1002/pmic.202100058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/10/2021] [Indexed: 01/09/2023]
Abstract
Perfluorooctanoic acid (PFOA) has been one of the most common perfluorochemicals, which are globally pervasive contaminants that are persistent, bioaccumulative, toxic, and have adverse impacts on human health. The highest concentration of PFOA occurs in the blood, where it strongly binds to human serum albumins (HSA). Thus, a method to reverse the HSA-PFOA binding is critical to help facilitate the faster elimination of PFOA from the body to minimize its toxicological effects. Inspired by the remediation effect of cyclodextrin (CD) to PFOA through host-guest interactions, herein, by elucidating inter-molecular interactions using a nanopore sensor, we demonstrated in vitro reversal of the binding of PFOA to HSA using γ-cyclodextrin (γ-CD). The competition behavior for the complexation of PFOA between HSA and γ-CD was discussed in combination with in situ nanopore current recording and nuclear magnetic resonance (NMR) characterization. The present work not only demonstrates the potential therapeutic application of γ-CD for PFOA removal from human blood, but also provides an emerging method for investigating interactions between organic compounds and proteins.
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Affiliation(s)
- Xiaojun Wei
- Biomedical Engineering Program, University of South Carolina, Columbia, South Carolina, USA.,Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, USA
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, USA
| | - Chang Liu
- Biomedical Engineering Program, University of South Carolina, Columbia, South Carolina, USA.,Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, USA
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10
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Zhang J, Zhu Y, Zhang Y. Potential ability of different types of cyclodextrins to modulate the interaction between bovine serum albumin and 1-hydroxypyrene. Food Chem 2020; 343:128516. [PMID: 33183870 DOI: 10.1016/j.foodchem.2020.128516] [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: 07/30/2020] [Revised: 10/03/2020] [Accepted: 10/27/2020] [Indexed: 01/22/2023]
Abstract
Hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) can bind with functional biomacromolecules and thus cause toxic effects in vivo. Four types of cyclodextrins (CDs) were selected to explore their potential ability to regulate the bindings between 1-hydroxypyrene (1-OHPyr) and bovine serum albumin (BSA) using multi-spectroscopic methods combined with molecular docking. The results showed that the four CDs caused varied modulating effects on the binding of BSA with 1-OHPyr, and the effects of γ-CD and (2-hydroxypropyl)-β-CD (HPCD) are the most significant. Specifically, γ-CD and HPCD could significantly reduce the binding affinity between 1-OHPyr and BSA, inhibit the micro-environmental changes of tryptophan residues, and slightly recover the helicity of BSA. The interactions and inclusion behavior of CDs with 1-OHPyr was the main reason why CDs could affect the binding of 1-OHPyr to BSA. The results indicated that γ-CD and HPCD might have potential application value in regulating the toxic effects of OH-PAHs.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Estuarine Ecological Security and Environmental Health (Fujian Province University), Tan Kah Kee College, Xiamen University, Zhangzhou 363105, PR China
| | - Yaxian Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
| | - Yong Zhang
- State Key Laboratory of Marine Environmental Sciences of China (Xiamen University), College of Environment and Ecology, Xiamen University, Xiamen 361102, PR China.
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11
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Šabović I, Cosci I, De Toni L, Ferramosca A, Stornaiuolo M, Di Nisio A, Dall'Acqua S, Garolla A, Foresta C. Perfluoro-octanoic acid impairs sperm motility through the alteration of plasma membrane. J Endocrinol Invest 2020; 43:641-652. [PMID: 31776969 DOI: 10.1007/s40618-019-01152-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/19/2019] [Indexed: 12/27/2022]
Abstract
CONTEXT Perfluoroalkyl-substances (PFAS) are chemical additives considered harmful for humans. We recently showed that accumulation of perfluoro-octanoic acid (PFOA) in human semen of exposed subjects was associated with altered motility parameters of sperm cells, suggesting direct toxicity. OBJECTIVES To determine whether direct exposure of human spermatozoa to PFOA was associated to impairment of cell function. PATIENTS AND METHODS Spermatozoa isolated from semen samples of ten normozoospermic healthy donors were exposed up to 2 h to PFOA, at concentrations from 0.1 to 10 ng/mL. Viability and motility parameters were evaluated by Sperm Class Analyser. Cell respiratory function was assessed by both mitochondrial probe JC-1 and respiratory control ratio (RCR) determination. Sperm accumulation of PFOA was quantified by liquid chromatography-mass spectrometry. Expression of organic ion-transporters OATP1 and SLCO1B2 was assessed by immunofluorescence and respective role in PFOA accumulation was evaluated by either blockade with probenecid or membrane scavenging through β-cyclodextrin (β-CD). Plasma membrane fluidity and electrochemical potential (ΔΨp) were evaluated, respectively, with Merocyanine-540 and Di-3-ANEPPDHQ fluorescent probes. RESULTS Compared to untreated controls, a threefold increase of the percentage of non-motile sperms was observed after 2 h of exposure to PFOA regardless of the concentration of PFOA, whilst RCR was significantly reduced. Only scavenging with β-CD was effective in reducing PFOA accumulation, suggesting membrane involvement. Altered membrane fluidity, reduced ΔΨp and sperm motility loss associated with exposure to PFOA were reverted by β-CD treatment. CONCLUSION PFOA alters human sperm motility through plasma-membrane disruption, an effect recovered by incubation with β-CD.
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Affiliation(s)
- I Šabović
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - I Cosci
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
- Familial Cancer Clinic, Veneto Institute of Oncology (IOV-IRCCS), Padua, Italy
| | - L De Toni
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - A Ferramosca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - M Stornaiuolo
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - A Di Nisio
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - S Dall'Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padua, Italy
| | - A Garolla
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - C Foresta
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy.
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12
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Patel BK, Sepay N, Mahapatra A. Structural alteration of myoglobin with two homologous cationic surfactants and effect of β-cyclodextrin: multifaceted insight and molecular docking study. NEW J CHEM 2020. [DOI: 10.1039/d0nj01113d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural alteration and regeneration of myoglobin.
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Affiliation(s)
| | - Nayim Sepay
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
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13
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Rajbanshi B, Dutta A, Mahato B, Roy D, Maiti DK, Bhattacharyya S, Roy MN. Study to explore host guest inclusion complexes of vitamin B1 with CD molecules for enhancing stability and innovative application in biological system. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111952] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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14
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Sammi SR, Foguth RM, Nieves CS, De Perre C, Wipf P, McMurray CT, Lee LS, Cannon JR. Perfluorooctane Sulfonate (PFOS) Produces Dopaminergic Neuropathology in Caenorhabditis elegans. Toxicol Sci 2019; 172:417-434. [PMID: 31428778 PMCID: PMC6876260 DOI: 10.1093/toxsci/kfz191] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Perfluorooctane sulfonate (PFOS) has been widely utilized in numerous industries. Due to long environmental and biological half-lives, PFOS is a major public health concern. Although the literature suggests that PFOS may induce neurotoxicity, neurotoxic mechanisms, and neuropathology are poorly understood. Thus, the primary goal of this study was to determine if PFOS is selectively neurotoxic and potentially relevant to specific neurological diseases. Nematodes (Caenorhabditis elegans) were exposed to PFOS or related per- and polyfluoroalkyl substances (PFAS) for 72 h and tested for evidence of neuropathology through examination of cholinergic, dopaminergic, gamma-amino butyric acid (GABA)ergic, and serotoninergic neuronal morphologies. Dopaminergic and cholinergic functional analyses were assessed through 1-nonanol and Aldicarb assay. Mechanistic studies assessed total reactive oxygen species, superoxide ions, and mitochondrial content. Finally, therapeutic approaches were utilized to further examine pathogenic mechanisms. Dopaminergic neuropathology occurred at lower exposure levels (25 ppm, approximately 50 µM) than required to produce neuropathology in GABAergic, serotonergic, and cholinergic neurons (100 ppm, approximately 200 µM). Further, PFOS exposure led to dopamine-dependent functional deficits, without altering acetylcholine-dependent paralysis. Mitochondrial content was affected by PFOS at far lower exposure level than required to induce pathology (≥1 ppm, approximately 2 µM). Perfluorooctane sulfonate exposure also enhanced oxidative stress. Further, mutation in mitochondrial superoxide dismutase rendered animals more vulnerable. Neuroprotective approaches such as antioxidants, PFAS-protein dissociation, and targeted (mitochondrial) radical and electron scavenging were neuroprotective, suggesting specific mechanisms of action. In general, other tested PFAS were less neurotoxic. The primary impact is to prompt research into potential adverse outcomes related to PFAS-induced dopaminergic neurotoxicity in humans.
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Affiliation(s)
- Shreesh Raj Sammi
- School of Health Sciences
- Purdue Institute for Integrative Neurosciences
| | - Rachel M Foguth
- School of Health Sciences
- Purdue Institute for Integrative Neurosciences
| | | | - Chloe De Perre
- Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
| | - Peter Wipf
- Departments of Chemistry, Pharmaceutical Sciences, and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Cynthia T McMurray
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Linda S Lee
- Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
| | - Jason R Cannon
- School of Health Sciences
- Purdue Institute for Integrative Neurosciences
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15
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Patel BK, Sepay N, Mahapatra A. Curious Results in the Prospective Binding Interactions of the Food Additive Tartrazine with β-Lactoglobulin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11579-11589. [PMID: 31385703 DOI: 10.1021/acs.langmuir.9b01242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The detailed characterizations of the binding interactions between food additive tartrazine (TZ) and β-lactoglobulin (β-LG) have been investigated through spectroscopic techniques combined with a molecular modeling study. A series of analyses, such as hyperchromic change in the UV-visible spectra, temperature-dependent quenching constant, time-resolved fluorescence, and Rayleigh scattering measurements, show that quenching of β-LG proceeds by a static quenching mechanism. TZ specifically binds with β-LG in a stoichiometry ratio of 1:1, and the observed binding constants (104, K) are 7.64, 9.13, 9.72, and 10.79 at 293, 298, 303, and 308 K, respectively. However, the curious results of binding constants (K) with temperature, encountered in the static quenching, have been well explained on the basis of Le Chatelier's principle. Thermodynamic data and pH-dependent studies along with the surface hydrophobicity binding displacement assay reveal that the durable mode of binding is chiefly entropy-driven, revealing noteworthy interactions of such ionic molecules with the hydrophobic part of β-LG. The modulation of protein conformation has been investigated through steady-state absorption spectroscopy, synchronous emission spectroscopy, circular dichroism, and dynamic light scattering studies. TZ acts as a potential inhibitor in fibrillogenesis. Furthermore, the molecular docking study offers accurate insights about the binding of TZ with β-LG, in consistence with the experimental results. This study would be helpful in pharmaceutical, food, and industrial engineering chemistry research.
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Affiliation(s)
- Biman Kumar Patel
- Department of Chemistry , Jadavpur University , Kolkata 700 032 , India
| | - Nayim Sepay
- Department of Chemistry , Jadavpur University , Kolkata 700 032 , India
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16
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Gao K, Zhuang T, Liu X, Fu J, Zhang J, Fu J, Wang L, Zhang A, Liang Y, Song M, Jiang G. Prenatal Exposure to Per- and Polyfluoroalkyl Substances (PFASs) and Association between the Placental Transfer Efficiencies and Dissociation Constant of Serum Proteins-PFAS Complexes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6529-6538. [PMID: 31099564 DOI: 10.1021/acs.est.9b00715] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Information on placental transfer and adverse outcomes of short-chain per- and polyfluoroalkyl substance (PFASs) is limited, and factors responsible for PFAS placental transfer are still unclear. In the present study, concentrations of 21 PFASs were analyzed in 132 paired maternal and cord serum samples collected from residents in Beijing, China, and the placental transfer efficiency (PTE) of each PFAS was calculated. PTEs of short-chain perfluoroalkyl acids (PFAAs), including PFBA (146%), PFBS (97%), PFPeA (118%), and PFHxA (110%), were first reported, and a complete U-shaped trend of PTEs from C4 to C13 of perfluoroalkyl carboxylic acids (PFCAs) was obtained. Positive association between maternal weight and PTE of perfluorooctanesulfonate (PFOS) ( p < 0.05) and negative association between maternal PFBA concentration and birth length ( p < 0.01) were observed. Using in vitro experiments, we further determined equilibrium dissociation constants ( Kds) of human serum albumin (HSA)-PFAS complexes ( Kd-HP), serum proteins-PFAS complexes ( Kd-SP), and liver-fatty acid binding protein (L-FABP)-PFAS complexes ( Kd-LP) and found that they were all significantly correlated with PTEs of PFASs. The correlation coefficient was 0.92, 0.89, and 0.86, respectively ( p < 0.01 in all three tests), suggesting that Kds of protein (serum)-PFAS complexes can play an important role in trans-placental transfer of PFASs in human and Kd-HP plays a pivotal role.
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Affiliation(s)
- Ke Gao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing , China
| | - Taifeng Zhuang
- Department of Pediatrics, Beijing Obstetrics and Gynecology Hospital , Capital Medical University , Beijing , China
| | - Xian Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
| | - Jianjie Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
| | - Jingxing Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- Institute of Environment and Health , Jianghan University , Wuhan , Hubei , China
| | - Jie Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing , China
| | - Liguo Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing , China
| | - Aiqian Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing , China
- Institute of Environment and Health , Jianghan University , Wuhan , Hubei , China
| | - Yong Liang
- Institute of Environment and Health , Jianghan University , Wuhan , Hubei , China
| | - Maoyong Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing , China
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing , China
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17
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Patel BK, Sepay N, Rudra S, Mahapatra A. Deciphering the role of the head group of cationic surfactants in their binding interactions with heme protein and their release by β-cyclodextrin. NEW J CHEM 2018. [DOI: 10.1039/c8nj02032a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We decipher the mode of binding of surfactants with hemoglobin and their release by β-cyclodextrin.
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Affiliation(s)
| | - Nayim Sepay
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
| | - Suparna Rudra
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
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