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Güler G, Acikgoz E, Mukhtarova G, Oktem G. Biomolecular fingerprints of the effect of zoledronic acid on prostate cancer stem cells: Comparison of 2D and 3D cell culture models. Arch Biochem Biophys 2024; 753:109920. [PMID: 38307315 DOI: 10.1016/j.abb.2024.109920] [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: 09/21/2023] [Revised: 12/23/2023] [Accepted: 01/30/2024] [Indexed: 02/04/2024]
Abstract
Revealing the potential of candidate drugs against different cancer types without disrupting normal cells depends on the drug mode of action. In the current study, the drug response of prostate cancer stem cells (PCSCs) to zoledronic acid (ZOL) grown in two-dimensional (2D) and three-dimensional (3D) culture systems was compared using Fourier transform-infrared (FT-IR) spectroscopy which is a vibrational spectroscopic technique, supporting by biochemical assays and imaging techniques. Based on our data, in 2D cell culture conditions, the ZOL treatment of PCSCs isolated according to both C133 and CD44 cell surface properties induced early/late apoptosis and suppressed migration ability. The CD133 gene expression and protein levels were altered, depending on culture systems. CD133 expression was significantly reduced in 2D cells upon ZOL treatment. FT-IR data revealed that the integrity, fluidity, and ordering/disordering states of the cell membrane and nucleic acid content were altered in both 2D and 3D cells after ZOL treatment. Regular protein structures decrease in 2D cells while glycogen and protein contents increase in 3D cells, indicating a more pronounced cytotoxic effect of ZOL for 2D cells. Untreated 3D PCSCs exhibited an even different spectral profile associated with IR signals of lipids, proteins, nucleic acids, and glycogen in comparison to untreated 2D cells. Our study revealed significant differences in the drug response and cellular constituents between 2D and 3D cells. Exploring molecular targets and/or drug-action mechanisms is significant in cancer treatment approaches; thus, FT-IR spectroscopy can be successfully applied as a novel drug-screening method in clinical research.
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Affiliation(s)
- Günnur Güler
- Biophysics Laboratory, Department of Physics, Izmir Institute of Technology, Urla, 35433, Izmir, Turkey.
| | - Eda Acikgoz
- Department of Histology and Embryology, Faculty of Medicine, Van Yuzuncu Yil University, 65080, Van, Turkey.
| | - Günel Mukhtarova
- Department of Basic Oncology, Faculty of Medicine, Ege University, 35550, Izmir, Turkey
| | - Gulperi Oktem
- Department of Histology and Embryology, Faculty of Medicine, Ege University, 35100, Izmir, Turkey
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Gharibzahedi SMT, Ahmadigol A, Khubber S, Altintas Z. Bionanocomposite films with plasticized WPI-jujube polysaccharide/starch nanocrystal blends for packaging fresh-cut carrots. Food Packag Shelf Life 2023. [DOI: 10.1016/j.fpsl.2023.101042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Deciphering the Biochemical Similarities and Differences Among Human Neuroglial Cells and Glioma Cells Using Fourier Transform Infrared Spectroscopy. World Neurosurg 2022; 168:e562-e569. [DOI: 10.1016/j.wneu.2022.10.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022]
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Gharibzahedi SMT, Ahmadigol A, Khubber S, Altintas Z. Whey protein isolate/jujube polysaccharide-based edible nanocomposite films reinforced with starch nanocrystals for the shelf-life extension of banana: Optimization and characterization. Int J Biol Macromol 2022; 222:1063-1077. [PMID: 36181883 DOI: 10.1016/j.ijbiomac.2022.09.232] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 09/14/2022] [Accepted: 09/26/2022] [Indexed: 11/05/2022]
Abstract
The formulation of new bionanocomposite (BNC) films using whey protein isolates (WPI, 3.3-11.7 %)-jujube polysaccharide (JPS, 1.59-18.41 %)/starch nanocrystals (SNCs, 0.32-3.68 %) blends was optimized. The ultrasound-assisted acid hydrolysis produced ~63.1 nm SNCs from native starch with -24.3 mV ζ-potential. The extracted JPS purification led to a single symmetrical peak for galactoarabinan-rich fraction (1.35 × 105 Da). The optimal levels of barrier (oxygen (11.85 cm3 m-2 d-1 atm-1) and water vapor (3.22 × 10-10 g m-1 s-1 Pa-1) permeability rate), optical (opacity index (2.7 AU μm-1), total color difference (18.69), and whiteness index (77.40)), and thermal (glass transition temperature (-8.29 °C) and melting point (110.38 °C)) properties were obtained at 5.0 % WPI, 15.0 % JPS, and 3.0 % SNCs. The film-forming solution of optimal BNCs had a significant antibacterial effect against Staphylococcus aureus and Escherichia coli. The improved crystallinity of BNCs at an optimal SNC level was confirmed by the XRD. The AFM and SEM images confirmed a continuous and uniform network for the optimal BNCs without any pores or cracks accompanied by low surface roughness. The FTIR spectroscopy proved covalent interaction and hydrogen bonding among chemical functional groups of WPI and JPS reinforced with SNCs. The optimal BNC could preserve banana fruits with favorable physicochemical and microbial quality during storage.
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Affiliation(s)
- Seyed Mohammad Taghi Gharibzahedi
- Institute of Chemistry, Technical University of Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany; Institute of Materials Science, Faculty of Engineering, Kiel University, 24143 Kiel, Germany.
| | - Adel Ahmadigol
- College of Food Science and Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Sucheta Khubber
- School of Biotechnology & Bioinformatics, D.Y. Patil University, CBD Belapur, Navi Mumbai, India
| | - Zeynep Altintas
- Institute of Chemistry, Technical University of Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany; Institute of Materials Science, Faculty of Engineering, Kiel University, 24143 Kiel, Germany.
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Del Alamo D, Meiler J, Mchaourab HS. Principles of Alternating Access in LeuT-fold Transporters: Commonalities and Divergences. J Mol Biol 2022; 434:167746. [PMID: 35843285 DOI: 10.1016/j.jmb.2022.167746] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/08/2022] [Accepted: 07/09/2022] [Indexed: 11/15/2022]
Abstract
Found in all domains of life, transporters belonging to the LeuT-fold class mediate the import and exchange of hydrophilic and charged compounds such as amino acids, metals, and sugar molecules. Nearly two decades of investigations on the eponymous bacterial transporter LeuT have yielded a library of high-resolution snapshots of its conformational cycle linked by solution-state experimental data obtained from multiple techniques. In parallel, its topology has been observed in symporters and antiporters characterized by a spectrum of substrate specificities and coupled to gradients of distinct ions. Here we review and compare mechanistic models of transport for LeuT, its well-studied homologs, as well as functionally distant members of the fold, emphasizing the commonalities and divergences in alternating access and the corresponding energy landscapes. Our integrated summary illustrates how fold conservation, a hallmark of the LeuT fold, coincides with divergent choreographies of alternating access that nevertheless capitalize on recurrent structural motifs. In addition, it highlights the knowledge gap that hinders the leveraging of the current body of research into detailed mechanisms of transport for this important class of membrane proteins.
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Affiliation(s)
- Diego Del Alamo
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA; Department of Chemistry, Vanderbilt University, Nashville, TN, USA. https://twitter.com/DdelAlamo
| | - Jens Meiler
- Department of Chemistry, Vanderbilt University, Nashville, TN, USA; Institute for Drug Discovery, Leipzig University, Leipzig, DE, USA. https://twitter.com/MeilerLab
| | - Hassane S Mchaourab
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA.
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Nešić MD, Dučić T, Algarra M, Popović I, Stepić M, Gonçalves M, Petković M. Lipid Status of A2780 Ovarian Cancer Cells after Treatment with Ruthenium Complex Modified with Carbon Dot Nanocarriers: A Multimodal SR-FTIR Spectroscopy and MALDI TOF Mass Spectrometry Study. Cancers (Basel) 2022; 14:cancers14051182. [PMID: 35267490 PMCID: PMC8909423 DOI: 10.3390/cancers14051182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/08/2022] [Accepted: 02/12/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Developing new anticancer medicaments is focused on inducing controlled elimination of tumor tissue without severe side effects. It is essential to enable the medicament to reach the target molecule without provoking the immune response too early. The first cellular changes might occur already at the level of the cell membrane, composed mainly of lipids. Therefore, we used spectroscopic techniques to study the interaction of potential metallodrug [Ru(η5-C5H5)(PPh3)2CN] (RuCN) with lipids of A2780 ovarian cancer cells and investigated if these changes are affected by the presence of drug carriers (carbon dots (CDs) and nitrogen-doped carbon dots (N-CDs)). Our results showed that CDs and N-CDs prevent lysis and moderate oxidative stress of lipids caused by metallodrug, still keeping the antitumor activity and potential to penetrate through the lipid bilayer. Therefore, Ru drug loading to carriers balances the anticancer efficiency and leads to better anticancer outcomes by reducing the oxidative stress that has been linked to cancer progression. Abstract In the last decade, targeting membrane lipids in cancer cells has been a promising approach that deserves attention in the field of anticancer drug development. To get a comprehensive understanding of the effect of the drug [Ru(η5-Cp)(PPh3)2CN] (RuCN) on cell lipidic components, we combine complementary analytical approaches, matrix-assisted laser desorption and ionization time-of-flight mass spectrometry (MALDI TOF MS) and synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectroscopy. Techniques are used for screening the effect of potential metallodrug, RuCN, without and with drug carriers (carbon dots (CDs) and nitrogen-doped carbon dots (N-CDs)) on the lipids of the human ovarian cancer cell line A2780. MALDI TOF MS results revealed that the lysis of ovarian cancer membrane lipids is promoted by RuCN and not by drug carriers (CDs and N-CDs). Furthermore, SR-FTIR results strongly suggested that the phospholipids of cancer cells undergo oxidative stress after the treatment with RuCN that was accompanied by the disordering of the fatty acid chains. On the other hand, using (N-)CDs as RuCN nanocarriers prevented the oxidative stress caused by RuCN but did not prevent the disordering of the fatty acid chain packing. Finally, we demonstrated that RuCN and RuCN/(N-)CDs alter the hydration of the membrane surface in the membrane–water interface region.
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Affiliation(s)
- Maja D. Nešić
- Center for Light-Based Research and Technologies COHERENCE, Department of Atomic Physics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.P.); (M.S.); (M.P.)
- Correspondence: (M.D.N.); (M.A.); Tel.: +381-113408770 (M.D.N.)
| | - Tanja Dučić
- ALBA-CELLS Synchrotron, MIRAS Beamline, 08290 Cerdanyola del Vallès, Spain;
| | - Manuel Algarra
- INAMAT2—Institute for Advanced Materials and Mathematics, Department of Science, Public University of Navarre, Campus de Arrosadia, 31006 Pamplona, Spain
- Correspondence: (M.D.N.); (M.A.); Tel.: +381-113408770 (M.D.N.)
| | - Iva Popović
- Center for Light-Based Research and Technologies COHERENCE, Department of Atomic Physics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.P.); (M.S.); (M.P.)
| | - Milutin Stepić
- Center for Light-Based Research and Technologies COHERENCE, Department of Atomic Physics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.P.); (M.S.); (M.P.)
| | - Mara Gonçalves
- CQM—Centro de Química da Madeira, Universidade da Madeira, 9020-105 Funchal, Portugal;
| | - Marijana Petković
- Center for Light-Based Research and Technologies COHERENCE, Department of Atomic Physics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.P.); (M.S.); (M.P.)
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Yu Y, Wang T, Gong Y, Wang W, Wang X, Yu D, Wu F, Wang L. Effect of ultrasound on the structural characteristics and oxidative stability of walnut oil oleogel coated with soy protein isolate-phosphatidylserine. ULTRASONICS SONOCHEMISTRY 2022; 83:105945. [PMID: 35149379 PMCID: PMC8841881 DOI: 10.1016/j.ultsonch.2022.105945] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/30/2022] [Accepted: 02/03/2022] [Indexed: 05/24/2023]
Abstract
In this study, the three-dimensional network system formed by rice bran wax (RBW) was used as the internal structure, and the external structure formed by soybean protein isolate (SPI) and phosphatidylserine (PS) was added on the basis of the internal structure to prepare walnut oil oleogel (SPI-PS-WOG). Ultrasonic treatment was applied to the mixed solution to make SPI-PS-WOG, on the basis, the effects of ultrasonic treatment on SPI-PS-WOG were investigated. The results showed that both β and β' crystalline forms were present in all SPI-PS-WOG samples. When the ultrasonic power was 450 W, the first weight loss peak in the thermogravimetric (TGA) curve appeared at 326 °C, which was shifted to the right compared to the peak that occurred when the ultrasonic power was 0 W, indicating that the thermal stability of the SPI-PS-WOG was improved by the ultrasonic treatment. Moreover, when the ultrasonic power was 450 W, the oil holding capacity (OHC) reached 95.3 %, which was the best compared with other groups. Both confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) showed that the ultrasonic treatment of appropriate power succeeded in making the SPI-PS-WOG samples more evenly dispersed in the internal structure and denser in the external structure. In terms of oxidative stability, it was found that the peroxide value of SPI-PS-WOG remained at 9.8 mmol/kg oil for 50 days under 450 W ultrasonic power treatment, which was significantly improved compared with liquid walnut oil (WO). These results provide a new idea for the preparation of oleogels, and also lay a theoretical foundation for the application of ultrasonic treatment in oleogels.
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Affiliation(s)
- Yingjie Yu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Tong Wang
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yuhang Gong
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Weining Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
| | - Xue Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
| | - Dianyu Yu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China.
| | - Fei Wu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China.
| | - Liqi Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
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Chotphruethipong L, Hutamekalin P, Sukketsiri W, Benjakul S. Effects of sonication and ultrasound on properties and bioactivities of liposomes loaded with hydrolyzed collagen from defatted sea bass skin conjugated with epigallocatechin gallate. J Food Biochem 2021; 45:e13809. [PMID: 34145603 DOI: 10.1111/jfbc.13809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 11/28/2022]
Abstract
Hydrolyzed collagen (HC) from defatted sea bass skin conjugated with 3% epigallocatechin gallate (EGCG) was prepared and the resulting HC-EGCG conjugate at various levels (0.25%-2%, w/v) was loaded into liposome. The obtained liposomes were subjected to sonication (S). Liposome loaded with 1% conjugate showed the highest encapsulation efficiency (EE) (p < .05). When the ultrasound-assisted process (UAP) at different amplitudes (20% and 40%) and times (2, 5, 10, and 15 min) were implemented, the highest EE of conjugate-loaded liposome was found at 20% amplitude for 2 min (p < .05). When S-liposome and UAP-liposome were lyophilized, decreasing EE of both samples was observed (p < .05). Lyophilized UAP-liposome had higher stability than lyophilized S-liposome during storage at 25℃ for 28 days. Additionally, antioxidant activity in the gastrointestinal track model system (GIMs) and digest obtained from GIMs were higher for UAP-liposome (p < .05). Therefore, liposome can be used for the delivery of conjugate. PRACTICAL APPLICATIONS: HC from defatted sea bass skin is considered to possess several bioactivities, especially skin nourishment and bone strengthening. Nevertheless, antioxidant activity, related to the treatment of several ailments, is still low for HC. Thus, grafting of HC with polyphenol such as EGCG via free radical method can be used for the enhancement of the antioxidant activity of HC. Although the resulting conjugate has augmented activity, it is unstable during storage and in the gastrointestinal digestion system. Liposome is a promising means to stabilize the conjugate under harsh condition, especially with the aid of the UAP. Thus, liposome loaded with conjugate having the reduced size has higher antioxidant activity with increased stability, which can have a wider range of applications.
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Affiliation(s)
- Lalita Chotphruethipong
- International Center of Excellence in Seafood Science and Innovation, Faculty of Agro-Industry, Prince of Songkla University, Songkhla, Thailand
| | - Pilaiwanwadee Hutamekalin
- Division of Health and Applied Science, Faculty of Science, Prince of Songkla University, Songkhla, Thailand
| | - Wanida Sukketsiri
- Division of Health and Applied Science, Faculty of Science, Prince of Songkla University, Songkhla, Thailand
| | - Soottawat Benjakul
- International Center of Excellence in Seafood Science and Innovation, Faculty of Agro-Industry, Prince of Songkla University, Songkhla, Thailand
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Ripanti F, Di Venere A, Cestelli Guidi M, Romani M, Filabozzi A, Carbonaro M, Piro MC, Sinibaldi F, Nucara A, Mei G. The Puzzling Problem of Cardiolipin Membrane-Cytochrome c Interactions: A Combined Infrared and Fluorescence Study. Int J Mol Sci 2021; 22:ijms22031334. [PMID: 33572777 PMCID: PMC7866282 DOI: 10.3390/ijms22031334] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 12/30/2022] Open
Abstract
The interaction of cytochrome c (cyt c) with natural and synthetic membranes is known to be a complex phenomenon, involving both protein and lipid conformational changes. In this paper, we combined infrared and fluorescence spectroscopy to study the structural transformation occurring to the lipid network of cardiolipin-containing large unilamellar vesicles (LUVs). The data, collected at increasing protein/lipid ratio, demonstrate the existence of a multi-phase process, which is characterized by: (i) the interaction of cyt c with the lipid polar heads; (ii) the lipid anchorage of the protein on the membrane surface; and (iii) a long-distance order/disorder transition of the cardiolipin acyl chains. Such effects have been quantitatively interpreted introducing specific order parameters and discussed in the frame of the models on cyt c activity reported in literature.
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Affiliation(s)
- Francesca Ripanti
- Department of Physics, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy;
| | - Almerinda Di Venere
- Department of Experimental Medicine, Tor Vergata University of Rome, Via Montpellier 1, 00133 Rome, Italy; (A.D.V.); (M.C.P.); (F.S.); (G.M.)
| | | | - Martina Romani
- INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, 00044 Frascati, Italy; (M.C.G.); (M.R.)
| | - Alessandra Filabozzi
- Department of Physics, Tor Vergata University of Rome, Via della Ricerca Scientifica 1, 00133 Rome, Italy;
| | - Marina Carbonaro
- Council for Agricultural Research and Economics (CREA), Research Centre for Food and Nutrition, Via Ardeatina 546, 00178 Rome, Italy;
| | - Maria Cristina Piro
- Department of Experimental Medicine, Tor Vergata University of Rome, Via Montpellier 1, 00133 Rome, Italy; (A.D.V.); (M.C.P.); (F.S.); (G.M.)
| | - Federica Sinibaldi
- Department of Experimental Medicine, Tor Vergata University of Rome, Via Montpellier 1, 00133 Rome, Italy; (A.D.V.); (M.C.P.); (F.S.); (G.M.)
| | - Alessandro Nucara
- Department of Physics, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy;
- Correspondence:
| | - Giampiero Mei
- Department of Experimental Medicine, Tor Vergata University of Rome, Via Montpellier 1, 00133 Rome, Italy; (A.D.V.); (M.C.P.); (F.S.); (G.M.)
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Hasda AM, Vuppaladadium SSR, Qureshi D, Prasad G, Mohanty B, Banerjee I, Shaikh H, Anis A, Sarkar P, Pal K. Graphene oxide reinforced nanocomposite oleogels improves corneal permeation of drugs. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.102024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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α-Helical protein absorption at post-traumatic epileptic foci monitored by Fourier transform infrared mapping. J Biosci 2020. [DOI: 10.1007/s12038-020-00028-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Pinilla CMB, Brandelli A, López-Caballero ME, Montero P, Gómez-Guillén MDC. Structural features of myofibrillar fish protein interacting with phosphatidylcholine liposomes. Food Res Int 2020; 137:109687. [DOI: 10.1016/j.foodres.2020.109687] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/20/2020] [Accepted: 09/06/2020] [Indexed: 01/12/2023]
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13
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Mechanisms of detoxification of high copper concentrations by the microalga Chlorella sorokiniana. Biochem J 2020; 477:3729-3741. [DOI: 10.1042/bcj20200600] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 11/17/2022]
Abstract
Microalgae have evolved mechanisms to respond to changes in copper ion availability, which are very important for normal cellular function, to tolerate metal pollution of aquatic ecosystems, and for modulation of copper bioavailability and toxicity to other organisms. Knowledge and application of these mechanisms will benefit the use of microalgae in wastewater processing and biomass production, and the use of copper compounds in the suppression of harmful algal blooms. Here, using electron microscopy, synchrotron radiation-based Fourier transform infrared spectroscopy, electron paramagnetic resonance spectroscopy, and X-ray absorption fine structure spectroscopy, we show that the microalga Chlorella sorokiniana responds promptly to Cu2+ at high non-toxic concentration, by mucilage release, alterations in the architecture of the outer cell wall layer and lipid structures, and polyphosphate accumulation within mucilage matrix. The main route of copper detoxification is by Cu2+ coordination to polyphosphates in penta-coordinated geometry. The sequestrated Cu2+ was accessible and could be released by extracellular chelating agents. Finally, the reduction in Cu2+ to Cu1+ appears also to take place. These findings reveal the biochemical basis of the capacity of microalgae to adapt to high external copper concentrations and to serve as both, sinks and pools of environmental copper.
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Fratzl-Zelman N, Gamsjaeger S, Blouin S, Kocijan R, Plasenzotti P, Rokidi S, Nawrot-Wawrzyniak K, Roetzer K, Uyanik G, Haeusler G, Shane E, Cohen A, Klaushofer K, Paschalis EP, Roschger P, Fratzl P, Zwerina J, Zwettler E. Alterations of bone material properties in adult patients with X-linked hypophosphatemia (XLH). J Struct Biol 2020; 211:107556. [PMID: 32619592 DOI: 10.1016/j.jsb.2020.107556] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/18/2020] [Accepted: 06/23/2020] [Indexed: 01/08/2023]
Abstract
X-linked hypophosphatemia (XLH) caused by PHEX mutations results in elevated serum FGF23 levels, renal phosphate wasting and low 1,25-dihydroxyvitamin D. The glycophosphoprotein osteopontin, a potent inhibitor of mineralization normally degraded by PHEX, accumulates within the bone matrix. Conventional therapy consisting of supplementation with phosphate and vitamin D analogs is burdensome and the effects on bone material poorly characterized. We analyzed transiliac bone biopsies from four adult patients, two of them severely affected due to no diagnosis and no treatment until adulthood. We used light microscopy, qBEI and FTIRI to study histology, histomorphometry, bone mineralization density distribution, properties of the organic matrix and size of hypomineralized periosteocytic lesions. Non-treatment resulted in severe osteomalacia, twice the amount of mineralized trabecular volume, multiple osteon-like perforations, continuity of lamellae from mineralized to unmineralized areas and distinctive patches of woven bone. Periosteocytic lesions were larger than in treated patients. The latter had nearly normal osteoid thicknesses, although surface was still elevated. The median calcium content of the matrix was always within normal range, although the percentage of lowly mineralized bone areas was highly increased in non-treated patients, resulting in a marked heterogeneity in mineralization. Divalent collagen cross-links were evident independently of the mineral content of the matrix. Broad osteoid seams lacked measurable pyridinoline, a mature trivalent cross-link and exhibited considerable acidic lipid content, typically found in matrix vesicles. Based on our results, we propose a model that possibly integrates the relationship between the observed mineralization disturbances, FGF23 secretion and the known osteopontin accumulation in XLH.
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Affiliation(s)
- Nadja Fratzl-Zelman
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria.
| | - Sonja Gamsjaeger
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Stéphane Blouin
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Roland Kocijan
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria; 1st Medical Department, Hanusch Hospital, Vienna, Austria
| | | | - Stamatia Rokidi
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Kamilla Nawrot-Wawrzyniak
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Katharina Roetzer
- Center for Medical Genetics, Hanusch Hospital, Vienna, Austria; Medical School, Sigmund Freud Private University, Vienna, Austria
| | - Gökhan Uyanik
- Center for Medical Genetics, Hanusch Hospital, Vienna, Austria; Medical School, Sigmund Freud Private University, Vienna, Austria
| | - Gabriele Haeusler
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - Elizabeth Shane
- Division of Endocrinology, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Adi Cohen
- Division of Endocrinology, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Klaus Klaushofer
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Eleftherios P Paschalis
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Paul Roschger
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria
| | - Peter Fratzl
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Potsdam, Germany
| | - Jochen Zwerina
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria; 1st Medical Department, Hanusch Hospital, Vienna, Austria
| | - Elisabeth Zwettler
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, Vienna, Austria; Medical Directorate, Hanusch Hospital, Vienna, Austria
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15
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Mecheta A, Hanachi A, Jeandel C, Arab-Tehrany E, Bianchi A, Velot E, Mezali K, Linder M. Physicochemical Properties and Liposomal Formulations of Hydrolysate Fractions of Four Sea Cucumbers (Holothuroidea: Echinodermata) from the Northwestern Algerian Coast. Molecules 2020; 25:E2972. [PMID: 32605291 PMCID: PMC7412306 DOI: 10.3390/molecules25132972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 06/22/2020] [Accepted: 06/26/2020] [Indexed: 11/21/2022] Open
Abstract
To promote the nutritional and pharmacological values of four sea cucumber species (Holothuria poli, H. tubulosa, H. arguinensis, and H. sanctori), harvested from the Algerian coast, we aimed to study their proximate composition, fatty acid profile and angiotensin-converting enzyme (ACE) inhibitory activity. Their phospholipids were also used to elaborate nanoliposomes and to encapsulate peptides obtained from the same source. After the physico-chemical characterization of nanoliposomes and peptides, in vitro analyses were realized. The four holothurian species showed a high amount of protein (49.26-69.34%), and an impressive lipid profile of 27 fatty acids, mainly composed of polar fatty acids (91.16-93.85%), with a high polyunsaturated fatty acids (PUFA) content (50.90-71.80%), particularly eicosapentaenoic acid (EPA) (5.07-8.76%) and docosahexaenoic acid (DHA) (4.86-7.25%). A high phospholipids amount was also found (55.20-69.85%), mainly composed of phosphatidylcholine (PC) (51.48-58.56%). Their peptide fractions exhibited a high ACE inhibitory activity (IC50 0.30 to 0.51 mg/mL). The results also showed that the nanoliposomes do not induce cytotoxicity and cell death in human MSCs and no perturbation of proliferation for all the times and the tested concentrations, as well as the combined nanoliposomes and hydrolysates (HTS) at a concentration of 0.1 mg/mL. All four sea cucumbers show potential as a new source for omega-3, omega-6, and bioactive peptides.
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Affiliation(s)
- Asmaa Mecheta
- Laboratory of Protection and Development of Coastal Marine Resources and Molecular Systematics, Department of Marine Sciences and Aquaculture, Faculty of Natural and Life Sciences, Abdelhamid Ibn Badis University Mostaganem, BP 227, National road N° 11, Kharrouba 27000, Mostaganem, Algeria
| | - Amine Hanachi
- Laboratoire d’Ingénierie des Biomolécules (LIBio), Lorraine University, 2, Forêt de Haye avenue TSA 40602, 54518 Vandœuvre CEDEX, France; (A.H.); (C.J.); (E.A.-T.)
| | - Carole Jeandel
- Laboratoire d’Ingénierie des Biomolécules (LIBio), Lorraine University, 2, Forêt de Haye avenue TSA 40602, 54518 Vandœuvre CEDEX, France; (A.H.); (C.J.); (E.A.-T.)
| | - Elmira Arab-Tehrany
- Laboratoire d’Ingénierie des Biomolécules (LIBio), Lorraine University, 2, Forêt de Haye avenue TSA 40602, 54518 Vandœuvre CEDEX, France; (A.H.); (C.J.); (E.A.-T.)
| | - Arnaud Bianchi
- UMR 7365 CNRS- Molecular Engineering and Articular Physiopathology, 9 Forêt de Haye Avenue, BP 20199, 54505 Vandœuvre-Lès-Nancy, France;
| | - Emilie Velot
- Faculty of Pharmacy, Laboratory of Practical Work in Physiology, Lorraine University, Brabois-Health Campus, 7 Forêt de Haye Avenue, BP 90170, F-54505 Vandœuvre-lès-Nancy CEDEX, France;
| | - Karim Mezali
- Laboratory of Protection and Development of Coastal Marine Resources and Molecular Systematics, Department of Marine Sciences and Aquaculture, Faculty of Natural and Life Sciences, Abdelhamid Ibn Badis University Mostaganem, BP 227, National road N° 11, Kharrouba 27000, Mostaganem, Algeria
| | - Michel Linder
- Laboratoire d’Ingénierie des Biomolécules (LIBio), Lorraine University, 2, Forêt de Haye avenue TSA 40602, 54518 Vandœuvre CEDEX, France; (A.H.); (C.J.); (E.A.-T.)
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16
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Kwiatkowski P, Wojciuk B, Wojciechowska-Koszko I, Łopusiewicz Ł, Grygorcewicz B, Pruss A, Sienkiewicz M, Fijałkowski K, Kowalczyk E, Dołęgowska B. Innate Immune Response against Staphylococcus aureus Preincubated with Subinhibitory Concentration of trans-Anethole. Int J Mol Sci 2020; 21:ijms21114178. [PMID: 32545315 PMCID: PMC7312609 DOI: 10.3390/ijms21114178] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
The study aimed to analyze morphological and functional changes of Staphylococcus aureus cells due to trans-anethole (a terpenoid and the major constituent of fennel, anise, or star anise essential oils) exposition, and their consequences for human neutrophils phagocytic activity as well as IL-8 production (recognized as the major chemoattractant). The investigation included the evaluation of changes occurring in S. aureus cultures, i.e., staphyloxanthin production, antioxidant activities, cell size distribution, and cells composition as a result of incubation with trans-anethole. It was found that the presence of trans-anethole in the culture medium reduced the level of staphyloxanthin production, as well as decreased antioxidant activities. Furthermore, trans-anethole-treated cells were characterized by larger size and a tendency to diffuse in comparison to the non-treated cells. Several cell components, such as phospholipids and peptidoglycan, were found remarkably elevated in the cultures treated with trans-anethole. As a result of the aforementioned cellular changes, the bacteria were phagocytized by neutrophils more efficiently (ingestion and parameters associated with killing activity were at a higher level as compared to the control system). Additionally, IL-8 production was at a higher level for trans-anethole modified bacteria. Our results suggest that trans-anethole represents a promising measure in combating severe staphylococcal infections, which has an important translational potential for clinical applications.
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Affiliation(s)
- Paweł Kwiatkowski
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
- Correspondence: ; Tel.: +48-91-466-1659
| | - Bartosz Wojciuk
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
| | - Iwona Wojciechowska-Koszko
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
| | - Łukasz Łopusiewicz
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, 71-270 Szczecin, Poland;
| | - Bartłomiej Grygorcewicz
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
| | - Agata Pruss
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
| | - Monika Sienkiewicz
- Department of Allergology and Respiratory Rehabilitation, Medical University of Łódź, 90-752 Łódź, Poland;
| | - Karol Fijałkowski
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology Szczecin, 70-311 Szczecin, Poland;
| | - Edward Kowalczyk
- Department of Pharmacology and Toxicology, Medical University of Łódź, 90-752 Łódź, Poland;
| | - Barbara Dołęgowska
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
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17
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A-R Ahmed G, Khalil SKH, El Hotaby W, Abbas L, Sherif HHA, Abdel-Rahman EA, Saber SH, Hassan M, Hassan MH, Ali SS. ATR-IR and EPR spectroscopy for detecting the alterations in cortical synaptosomes induced by aluminium stress. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117535. [PMID: 31748152 DOI: 10.1016/j.saa.2019.117535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/13/2019] [Accepted: 09/15/2019] [Indexed: 05/26/2023]
Abstract
Aluminium (Al) is reported to promote free radical production, decrease the antioxidant enzyme status and disturb the enzyme activity involved in acetylcholine metabolism leading to cognitive dysfunction that are strongly associated with Alzheimer's disease (AD) pathogenesis. This work aimed at investigating the effect of Al-toxicity on synaptosomal membrane biophysical properties and lipid peroxidation during 65 days. We utilized ATR-IR spectroscopy to study the changes in membrane biochemical structure and biophysical properties of isolated rat cortical synaptosomes, and EPR spin trapping and labeling to follow NADPH oxidase activity and changes of membrane order parameter, respectively. The results showed increase in membrane fluidity and disorder in early 21d of AlCl3 treatment, while after 42d the membrane rigidity, packing, and order increased. The late (65d) an increase in the amount of unsaturated fatty acids, the accumulation of lipid peroxide end products, and ROS production were detected in rat cortex synaptosomes mediated by Al toxicity and oxidative stress (OS). A dramatic increase was also detected in Ca2+ level, synaptic membrane polarity, and EPR-detected order S-parameter. These outcomes strongly suggest that the synaptosomal membrane phospholipids underwent free radical attacks mediated by AlCl3 due to greater NOX activity, and the release of synaptic vesicles into synaptic cleft might be hindered. The adopted spectroscopic techniques have shed light on the biomolecular structure and membrane biophysical changes of isolated cortical synaptosomes for the first time, allowing researchers to move closer to a complete understanding of pathological tissues.
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Affiliation(s)
- Gehan A-R Ahmed
- Spectroscopy Dept., Physics Division, National Research Centre, Cairo, Egypt, P.O.12622, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, Egypt.
| | - Safaa K H Khalil
- Spectroscopy Dept., Physics Division, National Research Centre, Cairo, Egypt, P.O.12622, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, Egypt
| | - W El Hotaby
- Spectroscopy Dept., Physics Division, National Research Centre, Cairo, Egypt, P.O.12622, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, Egypt
| | - Lamyaa Abbas
- Spectroscopy Dept., Physics Division, National Research Centre, Cairo, Egypt, P.O.12622, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, Egypt
| | - Hadeer H A Sherif
- Spectroscopy Dept., Physics Division, National Research Centre, Cairo, Egypt, P.O.12622, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, Egypt
| | - Engy A Abdel-Rahman
- Center for Aging and Associated Diseases, Helmy Institute of Medical Sciences, Zewail City of Science and Technology, Giza, Egypt; Pharmacology Department, Faculty of Medicine, Assuit University, Assuit, Egypt; Children's Cancer Hospital, 57357, Cairo, Egypt
| | - Saber H Saber
- Center for Aging and Associated Diseases, Helmy Institute of Medical Sciences, Zewail City of Science and Technology, Giza, Egypt
| | - Mahmoud Hassan
- Center for Aging and Associated Diseases, Helmy Institute of Medical Sciences, Zewail City of Science and Technology, Giza, Egypt
| | - Mohamed H Hassan
- Centre for Materials Science, Zewail City of Science and Technology, Giza, Egypt
| | - Sameh S Ali
- Center for Aging and Associated Diseases, Helmy Institute of Medical Sciences, Zewail City of Science and Technology, Giza, Egypt; Children's Cancer Hospital, 57357, Cairo, Egypt.
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18
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Xiang S, Zhao D, Hao H, Wang XU, Li L, Yang T. α-Helical protein absorption at post-traumatic epileptic foci monitored by Fourier transform infrared mapping. J Biosci 2020; 45:55. [PMID: 32345781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tissue analysis by Fourier transform infrared (FTIR) imaging can determine the biodistribution of molecules, without pre-analytical modification. We aimed to study the infrared spectroscopic changes of α-helical proteins at post-traumatic epileptic (PTE) foci by FTIR. FITR mapping was applied to detect α-helical proteins in rat brain tissue samples with post-traumatic epilepsy. Histological examination of brain sections showed that the rat model of PTE was successfully established. At the PTE foci, high α-helical absorption regions were evident, where the color difference and absorption were significantly different from those in the low-absorption regions. This provided a distinctive and characteristic pattern at the site of lesions. The use of FTIR imaging means that it is possible to measure the molecular structural changes resulting from PTE pathologies in tissues, providing a novel adjunct to conventional pathological diagnostic techniques.
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Affiliation(s)
- Siyang Xiang
- Center of Cooperative Innovation for Judicial Civilization, Beijing 100088, China
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19
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Turner BD, Sloan SW, Currell GR. Novel remediation of per- and polyfluoroalkyl substances (PFASs) from contaminated groundwater using Cannabis Sativa L. (hemp) protein powder. CHEMOSPHERE 2019; 229:22-31. [PMID: 31071516 DOI: 10.1016/j.chemosphere.2019.04.139] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 04/16/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are a group of environmentally persistent, man-made chemicals used in many industrial products and everyday consumer items. Of the plant proteins trialled, those of hemp (Cannabis sativa L.) were found to be far superior for PFAS removal than the next best protein, soy. The use of hemp plant proteins as a possible pump-and-treat solution to PFAS remediation from groundwater has been successfully demonstrated with very good removals (>98%) of the main contaminants of PFOS and PFHxS in approximately 1 h of contact time, with salinity enhancing removal of short chain PFAS. Changes to the secondary structure of hemp proteins was found using FTIR spectroscopy analysis and calculated based on the integrated areas of the amide I component bands. The amount of β-turns increased from ∼9.3% (control) to 44.1% (undiluted groundwater); with a decrease in random coils (25.6-8.6%); α-helix (19.3-8.6%) and β-sheets (38.8-23.1%). These changes indicate that hemp proteins partially unfold during the reaction with PFAS with other FTIR evidence suggesting sorption at hydrophobic sites of the protein as well as with the side chains of the amino acids aspartic and glutamic acid. The absence of these side chains in soy protein, as evidenced from FTIR and amino acid analysis, being part of the reason why soy removed less (approx. half) of the Σ(PFHxS + PFOS) load when compared to hemp. The findings reported here will lead to new, environmentally friendly methods for PFAS remediation.
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Affiliation(s)
- Brett D Turner
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, N.S.W., 2308, Australia.
| | - Scott W Sloan
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, N.S.W., 2308, Australia
| | - Glenn R Currell
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, N.S.W., 2308, Australia
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20
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Abstract
The cytoplasm of bacterial cells is a highly crowded cellular compartment that possesses considerable osmotic potential. As a result, and owing to the semipermeable nature of the cytoplasmic membrane and the semielastic properties of the cell wall, osmotically driven water influx will generate turgor, a hydrostatic pressure considered critical for growth and viability. Both increases and decreases in the external osmolarity inevitably trigger water fluxes across the cytoplasmic membrane, thus impinging on the degree of cellular hydration, molecular crowding, magnitude of turgor, and cellular integrity. Here, we assess mechanisms that permit the perception of osmotic stress by bacterial cells and provide an overview of the systems that allow them to genetically and physiologically cope with this ubiquitous environmental cue. We highlight recent developments implicating the secondary messenger c-di-AMP in cellular adjustment to osmotic stress and the role of osmotic forces in the life of bacteria-assembled in biofilms.
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Affiliation(s)
- Erhard Bremer
- Laboratory for Microbiology, Department of Biology; and Center for Synthetic Microbiology, Philipps-Universität Marburg, 35043 Marburg, Germany;
| | - Reinhard Krämer
- Institute of Biochemistry, University of Cologne, 50674 Cologne, Germany;
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21
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Ozdil B, Güler G, Acikgoz E, Kocaturk DC, Aktug H. The effect of extracellular matrix on the differentiation of mouse embryonic stem cells. J Cell Biochem 2019; 121:269-283. [PMID: 31168838 DOI: 10.1002/jcb.29159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/21/2019] [Accepted: 05/23/2019] [Indexed: 12/18/2022]
Abstract
Embryonic stem cells (ESCs) are promising research materials to investigate cell fate determination since they have the capability to differentiate. Stem cell differentiation has been extensively studied with various microenvironment mimicking structures to modify cellular dynamics associated with the cell-extracellular matrix (ECM) interactions and cell-cell communications. In the current study, our aim was to determine the effect of microenvironmental proteins with different concentrations on the capacity and differentiation capability of mouse ESCs (mESCs), combining the biochemical assays, imaging techniques, Fourier transform infrared (FTIR) spectroscopy, and unsupervised multivariate analysis. Based on our data, coating the surface of mESCs with Matrigel, used as an acellular matrix substrate, resulted in morphological and biochemical changes. mESCs exhibited alterations in their phenotype after growing on the Matrigel-coated surfaces, including their differentiation capacity, cell cycle phase pattern, membrane fluidity, and metabolic activities. In conclusion, mESCs can be stimulated physiologically, chemically, or mechanically to convert them a new phenotype. Thus, identification of ESCs' behavior in the acellular microenvironment could be vital to elucidate the mechanism of diseases. It might also be promising to control the cell fate in the field of tissue engineering.
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Affiliation(s)
- Berrin Ozdil
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey.,Department of Histology and Embryology, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Günnur Güler
- Department of Biomedical Engineering, Izmir University of Economics, Izmir, Turkey.,Center for Drug Research & Development and Pharmacokinetic Applications, Ege University, Izmir, Turkey
| | - Eda Acikgoz
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey.,Department of Histology and Embryology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - Duygu Calik Kocaturk
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Huseyin Aktug
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
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22
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Corradi V, Sejdiu BI, Mesa-Galloso H, Abdizadeh H, Noskov SY, Marrink SJ, Tieleman DP. Emerging Diversity in Lipid-Protein Interactions. Chem Rev 2019; 119:5775-5848. [PMID: 30758191 PMCID: PMC6509647 DOI: 10.1021/acs.chemrev.8b00451] [Citation(s) in RCA: 245] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Indexed: 02/07/2023]
Abstract
Membrane lipids interact with proteins in a variety of ways, ranging from providing a stable membrane environment for proteins to being embedded in to detailed roles in complicated and well-regulated protein functions. Experimental and computational advances are converging in a rapidly expanding research area of lipid-protein interactions. Experimentally, the database of high-resolution membrane protein structures is growing, as are capabilities to identify the complex lipid composition of different membranes, to probe the challenging time and length scales of lipid-protein interactions, and to link lipid-protein interactions to protein function in a variety of proteins. Computationally, more accurate membrane models and more powerful computers now enable a detailed look at lipid-protein interactions and increasing overlap with experimental observations for validation and joint interpretation of simulation and experiment. Here we review papers that use computational approaches to study detailed lipid-protein interactions, together with brief experimental and physiological contexts, aiming at comprehensive coverage of simulation papers in the last five years. Overall, a complex picture of lipid-protein interactions emerges, through a range of mechanisms including modulation of the physical properties of the lipid environment, detailed chemical interactions between lipids and proteins, and key functional roles of very specific lipids binding to well-defined binding sites on proteins. Computationally, despite important limitations, molecular dynamics simulations with current computer power and theoretical models are now in an excellent position to answer detailed questions about lipid-protein interactions.
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Affiliation(s)
- Valentina Corradi
- Centre
for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Besian I. Sejdiu
- Centre
for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Haydee Mesa-Galloso
- Centre
for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Haleh Abdizadeh
- Groningen
Biomolecular Sciences and Biotechnology Institute and Zernike Institute
for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Sergei Yu. Noskov
- Centre
for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Siewert J. Marrink
- Groningen
Biomolecular Sciences and Biotechnology Institute and Zernike Institute
for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - D. Peter Tieleman
- Centre
for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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23
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Acikgoz E, Güler G, Camlar M, Oktem G, Aktug H. Glycogen synthase kinase-3 inhibition in glioblastoma multiforme cells induces apoptosis, cell cycle arrest and changing biomolecular structure. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 209:150-164. [PMID: 30388586 DOI: 10.1016/j.saa.2018.10.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 10/13/2018] [Accepted: 10/21/2018] [Indexed: 06/08/2023]
Abstract
Glioblastoma multiforme (GBM) is the most malignant and aggressive primary human brain tumors. The regulatory pathways of apoptosis are altered in GBMs, leading to a survival advantage of the tumor cells. Thus, identification of target molecules, which are effective in triggering of the cell death mechanisms in GBM, is an essential strategy for therapeutic purposes. Glycogen synthase kinase-3 (GSK-3) plays an important role in apoptosis, proliferation and cell cycle. This study focused on the effect of GSK-3 inhibitor IX in the GBM cells. Apoptosis induction was determined by Annexin-V assay, multicaspase activity and immunofluorescence analyses. Concentration-dependent effects of GSK-3 inhibitor IX on the cell cycle were also evaluated. Moreover, the effect of GSK inhibitor on the cellular biomolecules was assessed by using ATR-FTIR spectroscopy. Our assay results indicated that GSK-3 inhibitor IX induces apoptosis, resulting in a significant increase in the expression of caspase-3 and caspase-8 proteins. Cell cycle analyses revealed that GSK-3 inhibitor IX leads to dose-dependent G2/M-phase cell cycle arrest. Based on the FTIR data, treatment of GBM cells causes dysregulation in the carbohydrate metabolism and induces apoptotic cell death which was characterized by the spectral alterations in nucleic acids, an increment in the lipid amount with disordering state and compositional changes in the cellular proteins. These findings suggest that GSK-3 inhibitor IX exhibits anti-cancer effects by inducing apoptosis and changing biomolecular structure of membrane lipids, carbohydrates, nucleic acids and proteins, and thus, may be further evaluated as a potential effective candidate agent for the GBM combination therapies.
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Affiliation(s)
- Eda Acikgoz
- Department of Histology and Embryology, Faculty of Medicine, Ege University, 35100 Izmir, Turkey; Department of Histology and Embryology, Faculty of Medicine, Yuzuncu Yil University, 65080 Van, Turkey.
| | - Günnur Güler
- Center for Drug Research & Development and Pharmacokinetic Applications (ARGEFAR), Ege University, 35100 Izmir, Turkey.
| | - Mahmut Camlar
- Department of Neurosurgery, Sağlık Bilimleri University Izmir Tepecik Education and Research Hospital, Izmir 35100, Turkey
| | - Gulperi Oktem
- Department of Histology and Embryology, Faculty of Medicine, Ege University, 35100 Izmir, Turkey
| | - Huseyin Aktug
- Department of Histology and Embryology, Faculty of Medicine, Ege University, 35100 Izmir, Turkey
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24
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Güler G, Guven U, Oktem G. Characterization of CD133 +/CD44 + human prostate cancer stem cells with ATR-FTIR spectroscopy. Analyst 2019; 144:2138-2149. [PMID: 30742170 DOI: 10.1039/c9an00093c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Current cancer treatments destroy the tumor mass but cannot prevent the recurrence of cancer. The heterogeneous structure of the tumor mass includes cancer stem cells that are responsible for tumor relapse, treatment resistance, invasion and metastasis. The biology of these cells is still not fully understood; therefore, effective treatments cannot be developed sufficiently. Herein, attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy, combined with unsupervised multivariate analysis, was applied to prostate cancer stem cells (CSCs), non-stem cancer cells (non-CSCs) and normal prostate epithelial cells to elucidate the molecular mechanisms and features of CSCs, which are crucial to improving the target specific therapies. This work revealed the spectral differences in the cellular mechanisms and biochemical structures among three different cell types. Particularly, prostate CSCs exhibit differences in the lipid composition and dynamics when compared to other cell types. CSCs also harbor pronounced differences in their major cellular macromolecules, including differences in the protein amount and content (mainly α-helices), the abundance of nucleic acids (DNA/RNA), altered nucleic acid conformation and carbohydrate composition. Interestingly, macromolecules containing the C[double bond, length as m-dash]O groups and negatively charged molecules having the COO- groups are abundant in prostate CSCs in comparison to prostate non-CSCs and normal prostate cells. Overall, this study demonstrates the potential use of ATR-FTIR spectroscopy as a powerful tool to obtain new insights into the understanding of the CSC features, which may provide new strategies for cancer treatment by selectively targeting the CSCs.
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Affiliation(s)
- Günnur Güler
- Center for Drug Research & Development and Pharmacokinetic Applications (ARGEFAR), Ege University, 35100, Izmir, Turkey. and Department of Physics, Science Faculty, Izmir Institute of Technology, 35430, Izmir, Turkey
| | - Ummu Guven
- Department of Stem Cell, Ege University Health Science Institute, Izmir, 35100, Turkey.
| | - Gulperi Oktem
- Department of Stem Cell, Ege University Health Science Institute, Izmir, 35100, Turkey. and Department of Embryology and Histology, School of Medicine, Ege University, 35100, Izmir, Turkey
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25
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Patil SS, Kumbhar DD, Manwar JV, Jadhao RG, Bakal RL, Wakode S. Ultrasound-Assisted Facile Synthesis of Nanostructured Hybrid Vesicle for the Nasal Delivery of Indomethacin: Response Surface Optimization, Microstructure, and Stability. AAPS PharmSciTech 2019; 20:97. [PMID: 30694405 DOI: 10.1208/s12249-018-1247-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/13/2018] [Indexed: 11/30/2022] Open
Abstract
This work is devoted to design a novel nanostructured hybrid vesicle (NHV) made of lecithin and an acrylate/C10-C30 alkyl acrylate for the nasal delivery of a model active indomethacin (IND), and further to probe its microstructure, intermolecular interactions, drug release behavior, ex vivo permeation, and stability. NHVs were prepared by cavitation technology employing RSM-based central composite design (CCD). Amount of lecithin (X1), power of ultrasound (X2), and sonication time (X3) were selected as three independent variables while the studied response included Z-Avg (nm), polydispersity index (PDI), and zeta potential (mV). The designed system (NHV) was investigated through dynamic (DLS) and electrophoretic light scattering (ELS), attenuated total reflectance (ATR-FTIR), oscillatory measurement (stress and frequency sweep), and transmission electron microscopy (TEM). CCD was found useful in optimizing NHV. An optimized formulation (S6) had Z-Avg 80 nm, PDI 0.2, and zeta potential of - 43.26 mV. Morphology investigation revealed spherical vesicles with smaller TEM diameters (the largest particle being 52.26 nm). ATR analysis demonstrated significant intermolecular interactions among the drug (IND) and the components of vesicles. The designed vesicles had an elastic predominance and displayed supercase II (n > 1) type of drug release. Besides, the vesicles possessed potential to transport IND across the nasal mucosa with the steady-state flux (μg/cm2/h) and permeability coefficient (cm/h) of 26.61 and 13.30 × 10-3, respectively. NHV exhibited an exceptional stability involving a combination of electrostatic and steric interactions while the histopathology investigation confirmed their safety for nasal administration.
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26
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Kot EF, Arseniev AS, Mineev KS. Behavior of Most Widely Spread Lipids in Isotropic Bicelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8302-8313. [PMID: 29924628 DOI: 10.1021/acs.langmuir.8b01454] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Isotropic bicelles are a widely used membrane mimetic for structural studies of membrane proteins and their transmembrane domains. Simple and cheap in preparation, they contain a patch of lipid bilayer that reproduces the native environment of membrane proteins. Despite the obvious power of bicelles in reproducing the various kinds of environments, the vast majority of structural studies employ the single lipid/detergent system. On the other hand, even if the alternative bicelle composition is used, the properties of mixtures are not characterized, and the mere presence of lipid bilayer and discoidal shape of bicelle particles is not confirmed. Here we present an extensive investigation of various bicellar mixtures and describe the behavior of bicelles with lipids other than classical DMPC, namely sphingomyelins (SM), phosphatidylethanolamines (PE), phosphatidylglycerols (PG), phosphatidylserines (PS), and cholesterol. These lipids are rarely used in modern structural biology, but can help a lot in understanding the influence of the membrane composition on the properties of both integral and peripheral membrane proteins. Additionally, the ability of diheptanoylphosphatidylcholine (DH7PC) to serve as a rim-forming agent was investigated. We followed the phase transitions as revealed by 31P NMR and size of particles measured by 1H NMR diffusion as the criteria of the proper morphology and structure of bicelles. As an outcome, we state that SM exclusively, and PG/PS in mixtures with zwitterionic lipids can form small isotropic bicelles, which reproduce the key features of lipid behavior in bilayers. Mixtures, containing exclusively the anionic lipids, fail to reveal the lipid phase transition and do not follow the size predicted for the ideal bicelle particles. PE and DH7PC are the unwanted components of bicellar mixtures, and cholesterol can be added to bicelles, however, with certain precautions. In combination with our several most recent works, this study provides a practical guide for the preparation of small isotropic bicelles.
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Affiliation(s)
- E F Kot
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry , Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10 , Moscow 117997, Russian Federation
- Moscow Institute of Physics and Technology , Institutsky per., 9 , Dolgoprudnyi 141700 , Russian Federation
| | - A S Arseniev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry , Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10 , Moscow 117997, Russian Federation
- Moscow Institute of Physics and Technology , Institutsky per., 9 , Dolgoprudnyi 141700 , Russian Federation
| | - K S Mineev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry , Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10 , Moscow 117997, Russian Federation
- Moscow Institute of Physics and Technology , Institutsky per., 9 , Dolgoprudnyi 141700 , Russian Federation
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27
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Jaipuria G, Ukmar-Godec T, Zweckstetter M. Challenges and approaches to understand cholesterol-binding impact on membrane protein function: an NMR view. Cell Mol Life Sci 2018; 75:2137-2151. [PMID: 29520423 PMCID: PMC11105689 DOI: 10.1007/s00018-018-2789-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/16/2018] [Accepted: 02/27/2018] [Indexed: 01/27/2023]
Abstract
Experimental evidence for a direct role of lipids in determining the structure, dynamics, and function of membrane proteins leads to the term 'functional lipids'. In particular, the sterol molecule cholesterol modulates the activity of many membrane proteins. The precise nature of cholesterol-binding sites and the consequences of modulation of local membrane micro-viscosity by cholesterol, however, is often unknown. Here, we review the current knowledge of the interaction of cholesterol with transmembrane proteins, with a special focus on structural aspects of the interaction derived from nuclear magnetic resonance approaches. We highlight examples of the importance of cholesterol modulation of membrane protein function, discuss the specificity of cholesterol binding, and review the proposed binding motifs from a molecular perspective. We conclude with a short perspective on what could be future trends in research efforts targeted towards a better understanding of cholesterol/membrane protein interactions.
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Affiliation(s)
- Garima Jaipuria
- German Center for Neurodegenerative Diseases (DZNE), Von-Siebold-Str. 3a, 37075, Göttingen, Germany
| | - Tina Ukmar-Godec
- German Center for Neurodegenerative Diseases (DZNE), Von-Siebold-Str. 3a, 37075, Göttingen, Germany
- Department of Neurology, University Medical Center Göttingen, University of Göttingen, Waldweg 33, 37073, Göttingen, Germany
| | - Markus Zweckstetter
- German Center for Neurodegenerative Diseases (DZNE), Von-Siebold-Str. 3a, 37075, Göttingen, Germany.
- Department of Neurology, University Medical Center Göttingen, University of Göttingen, Waldweg 33, 37073, Göttingen, Germany.
- Department for NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
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28
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Güler G, Acikgoz E, Karabay Yavasoglu NÜ, Bakan B, Goormaghtigh E, Aktug H. Deciphering the biochemical similarities and differences among mouse embryonic stem cells, somatic and cancer cells using ATR-FTIR spectroscopy. Analyst 2018; 143:1624-1634. [DOI: 10.1039/c8an00017d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cellular macromolecules play important roles in cellular behaviors and biological processes.
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Affiliation(s)
- Günnur Güler
- Center for Drug Research & Development and Pharmacokinetic Applications (ARGEFAR)
- Ege University
- Izmir
- Turkey
| | - Eda Acikgoz
- Department of Histology and Embryology
- Faculty of Medicine
- Ege University
- Izmir
- Turkey
| | | | - Buket Bakan
- Department of Biology
- Faculty of Science
- Ege University
- Izmir
- Turkey
| | - Erik Goormaghtigh
- Laboratory of Structure and Function of Biological Membranes
- Center of Structural Biology and Bioinformatics
- Université Libre de Bruxelles
- Brussels
- Belgium
| | - Huseyin Aktug
- Department of Histology and Embryology
- Faculty of Medicine
- Ege University
- Izmir
- Turkey
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29
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Kern C, Erdem FA, El-Kasaby A, Sandtner W, Freissmuth M, Sucic S. The N Terminus Specifies the Switch between Transport Modes of the Human Serotonin Transporter. J Biol Chem 2017; 292:3603-3613. [PMID: 28104804 PMCID: PMC5339746 DOI: 10.1074/jbc.m116.771360] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/18/2017] [Indexed: 10/25/2022] Open
Abstract
The serotonin transporter (SERT) and other monoamine transporters operate in either a forward transport mode where the transporter undergoes a full transport cycle or an exchange mode where the transporter seesaws through half-cycles. Amphetamines trigger the exchange mode, leading to substrate efflux. This efflux was proposed to rely on the N terminus, which was suggested to adopt different conformations in the inward facing, outward facing and amphetamine-bound states. This prediction was verified by tryptic digestion of SERT-expressing membranes: in the absence of Na+, the N terminus was rapidly digested. Amphetamine conferred protection against cleavage, suggesting a relay between the conformational states of the hydrophobic core and the N terminus. We searched for a candidate segment that supported the conformational switch by serial truncation removing 22 (ΔN22), 32 (ΔN32), or 42 (ΔN42) N-terminal residues. This did not affect surface expression, inhibitor binding, and substrate influx. However, amphetamine-induced efflux by SERT-ΔN32 or SERT-ΔN42 (but not by SERT-ΔN22) was markedly diminished. We examined the individual steps in the transport cycle by recording transporter-associated currents: the recovery rate of capacitive peak, but not of steady state, currents was significantly lower for SERT-ΔN32 than that of wild type SERT and SERT-ΔN22. Thus, the exchange mode of SERT-ΔN32 was selectively impaired. Our observations show that the N terminus affords the switch between transport modes. The findings are consistent with a model where the N terminus acts as a lever to support amphetamine-induced efflux by SERT.
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Affiliation(s)
- Carina Kern
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Fatma Asli Erdem
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Ali El-Kasaby
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Walter Sandtner
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Michael Freissmuth
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Sonja Sucic
- From the Institute of Pharmacology, Center of Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
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30
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Peng B, Ding XY, Sun C, Yang YN, Gao YJ, Zhao X. The chain order of binary unsaturated lipid bilayers modulated by aromatic-residue-containing peptides: an ATR-FTIR spectroscopy study. RSC Adv 2017. [DOI: 10.1039/c7ra01145h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
It highlights the importance of aromatic residues in influencing peptide binding to the membrane, demonstrates that the stability of the membranes depends on the lipid composition and the sequence, structural context, and orientation of the peptides.
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Affiliation(s)
- Bo Peng
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
| | - Xiao-Yan Ding
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
| | - Chao Sun
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
| | - Ya-Nan Yang
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
| | - Yu-Jiao Gao
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
| | - Xin Zhao
- Shanghai Key Laboratory of Magnetic Resonance
- Department of Physics
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
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