1
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Kim H, Taslakjian B, Kim S, Tirrell MV, Guler MO. Therapeutic Peptides, Proteins and their Nanostructures for Drug Delivery and Precision Medicine. Chembiochem 2024; 25:e202300831. [PMID: 38408302 DOI: 10.1002/cbic.202300831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/05/2024] [Accepted: 02/22/2024] [Indexed: 02/28/2024]
Abstract
Peptide and protein nanostructures with tunable structural features, multifunctionality, biocompatibility and biomolecular recognition capacity enable development of efficient targeted drug delivery tools for precision medicine applications. In this review article, we present various techniques employed for the synthesis and self-assembly of peptides and proteins into nanostructures. We discuss design strategies utilized to enhance their stability, drug-loading capacity, and controlled release properties, in addition to the mechanisms by which peptide nanostructures interact with target cells, including receptor-mediated endocytosis and cell-penetrating capabilities. We also explore the potential of peptide and protein nanostructures for precision medicine, focusing on applications in personalized therapies and disease-specific targeting for diagnostics and therapeutics in diseases such as cancer.
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Affiliation(s)
- HaRam Kim
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Boghos Taslakjian
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Sarah Kim
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Matthew V Tirrell
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, 60637, IL, USA
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2
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Slezak A, Chang K, Hossainy S, Mansurov A, Rowan SJ, Hubbell JA, Guler MO. Therapeutic synthetic and natural materials for immunoengineering. Chem Soc Rev 2024; 53:1789-1822. [PMID: 38170619 DOI: 10.1039/d3cs00805c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Immunoengineering is a rapidly evolving field that has been driving innovations in manipulating immune system for new treatment tools and methods. The need for materials for immunoengineering applications has gained significant attention in recent years due to the growing demand for effective therapies that can target and regulate the immune system. Biologics and biomaterials are emerging as promising tools for controlling immune responses, and a wide variety of materials, including proteins, polymers, nanoparticles, and hydrogels, are being developed for this purpose. In this review article, we explore the different types of materials used in immunoengineering applications, their properties and design principles, and highlight the latest therapeutic materials advancements. Recent works in adjuvants, vaccines, immune tolerance, immunotherapy, and tissue models for immunoengineering studies are discussed.
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Affiliation(s)
- Anna Slezak
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
| | - Kevin Chang
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
| | - Samir Hossainy
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
| | - Aslan Mansurov
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
| | - Stuart J Rowan
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA
| | - Jeffrey A Hubbell
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.
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3
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Mitrovic J, Richey G, Kim S, Guler MO. Peptide Hydrogels and Nanostructures Controlling Biological Machinery. Langmuir 2023; 39:11935-11945. [PMID: 37589176 PMCID: PMC10469456 DOI: 10.1021/acs.langmuir.3c01269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Indexed: 08/18/2023]
Abstract
Peptides are versatile building blocks for the fabrication of various nanostructures that result in the formation of hydrogels and nanoparticles. Precise chemical functionalization promotes discrete structure formation, causing controlled bioactivity and physical properties for functional materials development. The conjugation of small molecules on amino acid side chains determines their intermolecular interactions in addition to their intrinsic peptide characteristics. Molecular information affects the peptide structure, formation, and activity. In this Perspective, peptide building blocks, nanostructure formation mechanisms, and the properties of these peptide materials are discussed with the results of recent publications. Bioinstructive and stimuli-responsive peptide materials have immense impacts on the nanomedicine field including drug delivery, cellular engineering, regenerative medicine, and biomedicine.
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Affiliation(s)
- Jovana Mitrovic
- The Pritzker School of Molecular
Engineering, The University of Chicago, Chicago, Illinois 60637 United States
| | - Gabriella Richey
- The Pritzker School of Molecular
Engineering, The University of Chicago, Chicago, Illinois 60637 United States
| | - Sarah Kim
- The Pritzker School of Molecular
Engineering, The University of Chicago, Chicago, Illinois 60637 United States
| | - Mustafa O. Guler
- The Pritzker School of Molecular
Engineering, The University of Chicago, Chicago, Illinois 60637 United States
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4
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Lopes M, Torrado M, Barth D, Santos SD, Sever-Bahcekapili M, Tekinay AB, Guler MO, Cleymand F, Pêgo AP, Borges J, Mano JF. Supramolecular presentation of bioinstructive peptides on soft multilayered nanobiomaterials stimulates neurite outgrowth. Biomater Sci 2023. [PMID: 37334774 DOI: 10.1039/d3bm00438d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Peptide amphiphiles (PAs) have emerged as effective molecular building blocks for creating self-assembling nanobiomaterials for multiple biomedical applications. Herein, we report a straightforward approach to assemble soft bioinstructive platforms to recreate the native neural extracellular matrix (ECM) aiming for neuronal regeneration based on the electrostatic-driven supramolecular presentation of laminin-derived IKVAV-containing self-assembling PA (IKVAV-PA) on biocompatible multilayered nanoassemblies. Spectroscopic and microscopic techniques show that the co-assembly of positively charged low-molecular-weight IKVAV-PA with oppositely charged high-molecular-weight hyaluronic acid (HA) triggers the formation of ordered β-sheet structures denoting a one-dimensional nanofibrous network. The successful functionalization of poly(L-lysine)/HA layer-by-layer nanofilms with an outer positively charged layer of self-assembling IKVAV-PA is demonstrated by the quartz crystal microbalance with dissipation monitoring and the nanofibrous morphological properties revealed by atomic force microscopy. The bioactive ECM-mimetic supramolecular nanofilms promote the enhancement of primary neuronal cells' adhesion, viability, and morphology when compared to the PA without the IKVAV sequence and PA-free biopolymeric multilayered nanofilms, and stimulate neurite outgrowth. The nanofilms hold great promise as bioinstructive platforms for enabling the assembly of customized and robust multicomponent supramolecular biomaterials for neural tissue regeneration.
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Affiliation(s)
- Maria Lopes
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Marília Torrado
- INEB - Instituto de Engenharia Biomédica & i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Daryl Barth
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
- Institut Jean Lamour, UMR 7198 CNRS - Université de Lorraine, Parc de Saurupt CS 50840, 54011 Nancy Cedex, France
| | - Sofia D Santos
- INEB - Instituto de Engenharia Biomédica & i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
| | - Melike Sever-Bahcekapili
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
- Institute of Neurological Sciences and Psychiatry, Hacettepe University, 06230 Ankara, Turkey
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA
| | - Franck Cleymand
- Institut Jean Lamour, UMR 7198 CNRS - Université de Lorraine, Parc de Saurupt CS 50840, 54011 Nancy Cedex, France
| | - Ana P Pêgo
- INEB - Instituto de Engenharia Biomédica & i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - João Borges
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - João F Mano
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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5
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Dayob K, Zengin A, Garifullin R, Guler MO, Abdullin TI, Yergeshov A, Salakhieva DV, Cong HH, Zoughaib M. Metal-Chelating Self-Assembling Peptide Nanofiber Scaffolds for Modulation of Neuronal Cell Behavior. Micromachines (Basel) 2023; 14:883. [PMID: 37421116 DOI: 10.3390/mi14040883] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 04/15/2023] [Accepted: 04/18/2023] [Indexed: 07/09/2023]
Abstract
Synthetic peptides are promising structural and functional components of bioactive and tissue-engineering scaffolds. Here, we demonstrate the design of self-assembling nanofiber scaffolds based on peptide amphiphile (PA) molecules containing multi-functional histidine residues with trace metal (TM) coordination ability. The self-assembly of PAs and characteristics of PA nanofiber scaffolds along with their interaction with Zn, Cu, and Mn essential microelements were studied. The effects of TM-activated PA scaffolds on mammalian cell behavior, reactive oxygen species (ROS), and glutathione levels were shown. The study reveals the ability of these scaffolds to modulate adhesion, proliferation, and morphological differentiation of neuronal PC-12 cells, suggesting a particular role of Mn(II) in cell-matrix interaction and neuritogenesis. The results provide a proof-of-concept for the development of histidine-functionalized peptide nanofiber scaffolds activated with ROS- and cell-modulating TMs to induce regenerative responses.
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Affiliation(s)
- Kenana Dayob
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Scientific and Educational Center of Pharmaceutics, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
| | - Aygul Zengin
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Department of Aeronautical Engineering, University of Turkish Aeronautical Association, Türkkuşu Kampüsü, Ankara 06790, Turkey
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA
| | - Timur I Abdullin
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Scientific and Educational Center of Pharmaceutics, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
| | - Abdulla Yergeshov
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Scientific and Educational Center of Pharmaceutics, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
| | - Diana V Salakhieva
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Scientific and Educational Center of Pharmaceutics, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
| | - Hong Hanh Cong
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St., Hanoi 100000, Vietnam
| | - Mohamed Zoughaib
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
- Scientific and Educational Center of Pharmaceutics, Kazan (Volga Region) Federal University, 18 Kremlyovskaya St., 420008 Kazan, Russia
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6
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Yaylaci S, Dinç E, Aydın B, Tekinay AB, Guler MO. Peptide Nanofiber System for Sustained Delivery of Anti-VEGF Proteins to the Eye Vitreous. Pharmaceutics 2023; 15:pharmaceutics15041264. [PMID: 37111749 PMCID: PMC10141348 DOI: 10.3390/pharmaceutics15041264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023] Open
Abstract
Ranibizumab is a recombinant VEGF-A antibody used to treat the wet form of age-related macular degeneration. It is intravitreally administered to ocular compartments, and the treatment requires frequent injections, which may cause complications and patient discomfort. To reduce the number of injections, alternative treatment strategies based on relatively non-invasive ranibizumab delivery are desired for more effective and sustained release in the eye vitreous than the current clinical practice. Here, we present self-assembled hydrogels composed of peptide amphiphile molecules for the sustained release of ranibizumab, enabling local high-dose treatment. Peptide amphiphile molecules self-assemble into biodegradable supramolecular filaments in the presence of electrolytes without the need for a curing agent and enable ease of use due to their injectable nature-a feature provided by shear thinning properties. In this study, the release profile of ranibizumab was evaluated by using different peptide-based hydrogels at varying concentrations for improved treatment of the wet form of age-related macular degeneration. We observed that the slow release of ranibizumab from the hydrogel system follows extended- and sustainable release patterns without any dose dumping. Moreover, the released drug was biologically functional and effective in blocking the angiogenesis of human endothelial cells in a dose-dependent manner. In addition, an in vivo study shows that the drug released from the hydrogel nanofiber system can stay in the rabbit eye's posterior chamber for longer than a control group that received only a drug injection. The tunable physiochemical characteristics, injectable nature, and biodegradable and biocompatible features of the peptide-based hydrogel nanofiber show that this delivery system has promising potential for intravitreal anti-VEGF drug delivery in clinics to treat the wet form age-related macular degeneration.
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Affiliation(s)
- Seher Yaylaci
- Faculty of Medicine, Lokman Hekim University, Ankara 06800, Turkey
| | - Erdem Dinç
- Department of Ophthalmology, Faculty of Medicine, Mersin University, Mersin 33000, Turkey
| | - Bahri Aydın
- Department of Ophthalmology, Faculty of Medicine, Gazi University, Ankara 06560, Turkey
| | | | - Mustafa O Guler
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637, USA
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7
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Yaylaci S, Guler MO, Tekinay AB. Sulfated GAG mimetic peptide nanofibers enhance chondrogenic differentiation of mesenchymal stem cells in 3D in vitro models. Regen Biomater 2022; 10:rbac084. [PMID: 36683737 PMCID: PMC9847523 DOI: 10.1093/rb/rbac084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/27/2022] [Accepted: 10/08/2022] [Indexed: 11/09/2022] Open
Abstract
Articular cartilage, which is exposed to continuous repetitive compressive stress, has limited self-healing capacity in the case of trauma. Thus, it is crucial to develop new treatment options for the effective regeneration of the cartilage tissue. Current cellular therapy treatment options are microfracture and autologous chondrocyte implantation; however, these treatments induce the formation of fibrous cartilage, which degenerates over time, rather than functional hyaline cartilage tissue. Tissue engineering studies using biodegradable scaffolds and autologous cells are vital for developing an effective long-term treatment option. 3D scaffolds composed of glycosaminoglycan-like peptide nanofibers are synthetic, bioactive, biocompatible, and biodegradable and trigger cell-cell interactions that enhance chondrogenic differentiation of cells without using any growth factors. We showed differentiation of mesenchymal stem cells into chondrocytes in both 2D and 3D culture, which produce a functional cartilage extracellular matrix, employing bioactive cues integrated into the peptide nanofiber scaffold without adding exogenous growth factors.
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Affiliation(s)
| | - Mustafa O Guler
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
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8
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Garifullin R, Guler MO. Retraction notice to "Electroactive peptide-based supramolecular polymers" [Materials Today Bio, Volume 10, March 2021, 100099]. Mater Today Bio 2022; 16:100443. [PMID: 36311162 PMCID: PMC9597355 DOI: 10.1016/j.mtbio.2022.100443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
[This retracts the article DOI: 10.1016/j.mtbio.2021.100099.].
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Affiliation(s)
- Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420021, Kazan, Russian Federation
| | - Mustafa O. Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA,Corresponding author.
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9
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Abstract
The electroactivity as a supramolecular feature of intelligently designed self-assembled systems stimulates a wide interest in development of new stimuli-responsive biomaterials. A diverse set of nanostructures are fabricated through programmed self-assembly of molecules for functional materials. Electroactive groups are conjugated as a functional moiety for organic semiconductor applications. In this review, we present recent examples of self-assembling peptide molecules and electroactive units for supramolecular functional electronic and optical materials with potential biomedical and bioelectronics applications.
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Affiliation(s)
- Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420021 Kazan, Russian Federation
| | - Mustafa O. Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA
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10
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Sever-Bahcekapili M, Yilmaz C, Demirel A, Kilinc MC, Dogan I, Caglar YS, Guler MO, Tekinay AB. Neuroactive Peptide Nanofibers for Regeneration of Spinal Cord after Injury. Macromol Biosci 2020; 21:e2000234. [PMID: 33043585 DOI: 10.1002/mabi.202000234] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/23/2020] [Indexed: 12/27/2022]
Abstract
The highly complex nature of spinal cord injuries (SCIs) requires design of novel biomaterials that can stimulate cellular regeneration and functional recovery. Promising SCI treatments use biomaterial scaffolds, which provide bioactive cues to the cells in order to trigger neural regeneration in the spinal cord. In this work, the use of peptide nanofibers is demonstrated, presenting protein binding and cellular adhesion epitopes in a rat model of SCI. The self-assembling peptide molecules are designed to form nanofibers, which display heparan sulfate mimetic and laminin mimetic epitopes to the cells in the spinal cord. These neuroactive nanofibers are found to support adhesion and viability of dorsal root ganglion neurons as well as neurite outgrowth in vitro and enhance tissue integrity after 6 weeks of injury in vivo. Treatment with the peptide nanofiber scaffolds also show significant behavioral improvement. These results demonstrate that it is possible to facilitate regeneration especially in the white matter of the spinal cord, which is usually damaged during the accidents using bioactive 3D nanostructures displaying high densities of laminin and heparan sulfate-mimetic epitopes on their surfaces.
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Affiliation(s)
- Melike Sever-Bahcekapili
- Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
| | - Canelif Yilmaz
- Neuroscience Graduate Program, Bilkent University, Ankara, 06800, Turkey
| | - Altan Demirel
- Department of Neurosurgery, Aksaray State Hospital, Aksaray, 68200, Turkey
| | - Mustafa Cemil Kilinc
- Faculty of Medicine, Department of Neurosurgery, Ankara University, Ankara, 06100, Turkey
| | - Ihsan Dogan
- Faculty of Medicine, Department of Neurosurgery, Ankara University, Ankara, 06100, Turkey
| | - Yusuf Sukru Caglar
- Faculty of Medicine, Department of Neurosurgery, Ankara University, Ankara, 06100, Turkey
| | - Mustafa O Guler
- The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA
| | - Ayse B Tekinay
- Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.,The Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.,Eryigit Research and Development Center, Ankara, 06380, Turkey
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11
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Luong TD, Zoughaib M, Garifullin R, Kuznetsova S, Guler MO, Abdullin TI. In Situ functionalization of Poly(hydroxyethyl methacrylate) Cryogels with Oligopeptides via β-Cyclodextrin–Adamantane Complexation for Studying Cell-Instructive Peptide Environment. ACS Appl Bio Mater 2019; 3:1116-1128. [DOI: 10.1021/acsabm.9b01059] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Thai Duong Luong
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
| | - Mohamed Zoughaib
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
| | - Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
- Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey
| | - Svetlana Kuznetsova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
| | - Mustafa O. Guler
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Timur I. Abdullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
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12
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Eren Cimenci C, Kurtulus GU, Caliskan OS, Guler MO, Tekinay AB. N-Cadherin Mimetic Peptide Nanofiber System Induces Chondrogenic Differentiation of Mesenchymal Stem Cells. Bioconjug Chem 2019; 30:2417-2426. [PMID: 31415164 DOI: 10.1021/acs.bioconjchem.9b00514] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cadherins are vital for cell-to-cell interactions during tissue growth, migration, and differentiation processes. Both biophysical and biochemical inputs are generated upon cell-to-cell adhesions, which determine the fate of the mesenchymal stem cells (MSCs). The effect of cadherin interactions on the MSC differentiation still remains elusive. Here we combined the N-Cadherin mimetic peptide (HAV-PA) with the self-assembling E-PA and the resultant N-cadherin mimetic peptide nanofibers promoted chondrogenic differentiation of MSCs in conjunction with chondrogenic factors as a synthetic extracellular matrix system. Self-assembly of the precursor peptide amphiphile molecules HAV-PA and E-PA enable the organization of HAV peptide residues in close proximity to the cell interaction site, forming a supramolecular N-cadherin-like system. These bioactive peptide nanofibers not only promoted viability and enhanced adhesion of MSCs but also augmented the expression of cartilage specific matrix components compared to the nonbioactive control nanofibers. Overall, the N-cadherin mimetic peptide nanofiber system facilitated MSC commitment into the chondrogenic lineage presenting an alternative bioactive platform for stem-cell-based cartilage regeneration.
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Affiliation(s)
- Cagla Eren Cimenci
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM) , Bilkent University , Ankara 06800 , Turkey
| | - Gozde Uzunalli Kurtulus
- Department of Comparative Pathobiology , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Ozum S Caliskan
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM) , Bilkent University , Ankara 06800 , Turkey
| | - Mustafa O Guler
- Pritzker School of Molecular Engineering , University of Chicago , Chicago , Illinois 60637 , United States
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM) , Bilkent University , Ankara 06800 , Turkey.,Eryigit Biomedical Devices Research and Development Center , Ankara 06380 , Turkey.,Neuroscience Graduate Program , Bilkent University , Ankara 06800 , Turkey
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13
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Uysal O, Arslan E, Gulseren G, Kilinc MC, Dogan I, Ozalp H, Caglar YS, Guler MO, Tekinay AB. Collagen Peptide Presenting Nanofibrous Scaffold for Intervertebral Disc Regeneration. ACS Appl Bio Mater 2019; 2:1686-1695. [DOI: 10.1021/acsabm.9b00062] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
| | | | | | - Mustafa Cemil Kilinc
- Department of Neurosurgery, Ankara University Faculty of Medicine, Ankara 06100, Turkey
| | - Ihsan Dogan
- Department of Neurosurgery, Ankara University Faculty of Medicine, Ankara 06100, Turkey
| | - Hakan Ozalp
- Department of Neurosurgery, Mersin University Faculty of Medicine, Mersin 33343, Turkey
| | - Yusuf Sukru Caglar
- Department of Neurosurgery, Ankara University Faculty of Medicine, Ankara 06100, Turkey
| | - Mustafa O. Guler
- Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
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14
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Okur Z, Senturk OI, Yilmaz C, Gulseren G, Mammadov B, Guler MO, Tekinay AB. Promotion of neurite outgrowth by rationally designed NGF-β binding peptide nanofibers. Biomater Sci 2018; 6:1777-1790. [PMID: 29770392 DOI: 10.1039/c8bm00311d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Promotion of neurite outgrowth is an important limiting step for regeneration in nerve injury and depends strongly on the local expression of nerve growth factor (NGF). The rational design of bioactive materials is a promising approach for the development of novel therapeutic methods for nerve regeneration, and biomaterials capable of presenting NGF to nerve cells are especially suitable for this purpose. In this study, we show bioactive peptide amphiphile (PA) nanofibers capable of promoting neurite outgrowth by displaying high density binding epitopes for NGF. A high-affinity NGF-binding sequence was identified by phage display and combined with a beta-sheet forming motif to produce a self-assembling PA molecule. The bioactive nanofiber had higher affinity for NGF compared to control nanofibers and in vitro studies revealed that the NGF binding peptide amphiphile nanofibers (NGFB-PA nanofiber) significantly promote the neurite outgrowth of PC-12 cells. In addition, the nanofibers induced differentiation of PC-12 cells into neuron-like cells by enhancing NGF/high-activity NGF receptor (TrkA) interactions and activating MAPK pathway elements. The NGFB-PA nanofiber was further shown as a promising material to support axonal outgrowth from primary sensory neurons. These materials will pave the way for the development of new therapeutic agents for peripheral nervous system injuries.
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Affiliation(s)
- Zeynep Okur
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
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15
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Sever M, Gunay G, Guler MO, Tekinay AB. Tenascin-C derived signaling induces neuronal differentiation in a three-dimensional peptide nanofiber gel. Biomater Sci 2018; 6:1859-1868. [PMID: 29799029 DOI: 10.1039/c7bm00850c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The development of new biomaterials mimicking the neuronal extracellular matrix (ECM) requires signals for the induction of neuronal differentiation and regeneration. In addition to the biological and chemical cues, the physical properties of the ECM should also be considered while designing regenerative materials for nervous tissue. In this study, we investigated the influence of the microenvironment on tenascin-C signaling using 2D surfaces and 3D scaffolds generated by a peptide amphiphile nanofiber gel with a tenascin-C derived peptide epitope (VFDNFVLK). While tenascin-C mimetic PA nanofibers significantly increased the length and number of neurites produced by PC12 cells on 2D cell culture, more extensive neurite outgrowth was observed in the 3D gel environment. PC12 cells encapsulated within the 3D tenascin-C mimetic peptide nanofiber gel also exhibited significantly increased expression of neural markers compared to the cells on 2D surfaces. Our results emphasize the synergistic effects of the 3D conformation of peptide nanofibers along with the tenascin-C signaling and growth factors on the neuronal differentiation of PC12 cells, which may further provide more tissue-like morphology for therapeutic applications.
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Affiliation(s)
- Melike Sever
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey.
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16
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Dikecoglu FB, Topal AE, Ozkan AD, Tekin ED, Tekinay AB, Guler MO, Dana A. Force and time-dependent self-assembly, disruption and recovery of supramolecular peptide amphiphile nanofibers. Nanotechnology 2018; 29:285701. [PMID: 29664418 DOI: 10.1088/1361-6528/aabeb4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biological feedback mechanisms exert precise control over the initiation and termination of molecular self-assembly in response to environmental stimuli, while minimizing the formation and propagation of defects through self-repair processes. Peptide amphiphile (PA) molecules can self-assemble at physiological conditions to form supramolecular nanostructures that structurally and functionally resemble the nanofibrous proteins of the extracellular matrix, and their ability to reconfigure themselves in response to external stimuli is crucial for the design of intelligent biomaterials systems. Here, we investigated real-time self-assembly, deformation, and recovery of PA nanofibers in aqueous solution by using a force-stabilizing double-pass scanning atomic force microscopy imaging method to disrupt the self-assembled peptide nanofibers in a force-dependent manner. We demonstrate that nanofiber damage occurs at tip-sample interaction forces exceeding 1 nN, and the damaged fibers subsequently recover when the tip pressure is reduced. Nanofiber ends occasionally fail to reconnect following breakage and continue to grow as two individual nanofibers. Energy minimization calculations of nanofibers with increasing cross-sectional ellipticity (corresponding to varying levels of tip-induced fiber deformation) support our observations, with high-ellipticity nanofibers exhibiting lower stability compared to their non-deformed counterparts. Consequently, tip-mediated mechanical forces can provide an effective means of altering nanofiber integrity and visualizing the self-recovery of PA assemblies.
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Affiliation(s)
- F Begum Dikecoglu
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey. Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, A-4020 Linz, Austria
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17
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Arslan E, Sardan Ekiz M, Eren Cimenci C, Can N, Gemci MH, Ozkan H, Guler MO, Tekinay AB. Protective therapeutic effects of peptide nanofiber and hyaluronic acid hybrid membrane in in vivo osteoarthritis model. Acta Biomater 2018; 73:263-274. [PMID: 29656073 DOI: 10.1016/j.actbio.2018.04.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 04/02/2018] [Accepted: 04/05/2018] [Indexed: 01/27/2023]
Abstract
Osteoarthritis (OA) is a condition where tissue function is lost through a combination of secondary inflammation and deterioration in articular cartilage. One of the most common causes of OA is age-related tissue impairment because of wear and tear due to mechanical erosion. Hyaluronic acid-based viscoelastic supplements have been widely used for the treatment of knee injuries. However, the current formulations of hyaluronic acid are unable to provide efficient healing and recovery. Here, a nanofiber-hyaluronic acid membrane system that was prepared by using a quarter of the concentration of commercially available hyaluronic acid supplement, Hyalgan®, was used for the treatment of an osteoarthritis model, and Synvisc®, which is another commercially available hyaluronic acid containing viscoelastic supplement, was used as a control. The results show that this system provides efficient protection of arthritic cartilage tissue through the preservation of cartilage morphology with reduced osteophyte formation, protection of the subchondral region from deterioration, and maintenance of cartilage specific matrix proteins in vivo. In addition, the hybrid nanofiber membrane enabled chondrocyte encapsulation and provided a suitable culturing environment for stem cell growth in vitro. Overall, our results suggest that this hybrid nanofibrous scaffold provides a potential platform the treatment of OA. STATEMENT OF SIGNIFICANCE Osteoarthritis is a debilitating joint disease affecting millions of people worldwide. It occurs especially in knees due to aging, sport injuries or obesity. Although hyaluronic acid-based viscoelastic supplements are widely used, there is still no effective treatment method for osteoarthritis, which necessitates surgical operation as an only choice for severe cases. Therefore, there is an urgent need for efficient therapeutics. In this study, a nanofiber-HA membrane system was developed for the efficient protection of arthritic cartilage tissue from degeneration. This hybrid nanofiber system provided superior therapeutic activity at a relatively lower concentration of hyaluronic acid than Hyalgan® and Synvisc® gels, which are currently used in clinics. This work demonstrates for the first time that this hybrid nanofiber membrane scaffold can be utilized as a potential candidate for osteoarthritis treatment.
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18
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Khalily MA, Usta H, Ozdemir M, Bakan G, Dikecoglu FB, Edwards-Gayle C, Hutchinson JA, Hamley IW, Dana A, Guler MO. The design and fabrication of supramolecular semiconductor nanowires formed by benzothienobenzothiophene (BTBT)-conjugated peptides. Nanoscale 2018; 10:9987-9995. [PMID: 29774920 DOI: 10.1039/c8nr01604f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
π-Conjugated small molecules based on a [1]benzothieno[3,2-b]benzothiophene (BTBT) unit are of great research interest in the development of solution-processable semiconducting materials owing to their excellent charge-transport characteristics. However, the BTBT π-core has yet to be demonstrated in the form of electro-active one-dimensional (1D) nanowires that are self-assembled in aqueous media for potential use in bioelectronics and tissue engineering. Here we report the design, synthesis, and self-assembly of benzothienobenzothiophene (BTBT)-peptide conjugates, the BTBT-peptide (BTBT-C3-COHN-Ahx-VVAGKK-Am) and the C8-BTBT-peptide (C8-BTBT-C3-COHN-Ahx-VVAGKK-Am), as β-sheet forming amphiphilic molecules, which self-assemble into highly uniform nanofibers in water with diameters of 11-13(±1) nm and micron-size lengths. Spectroscopic characterization studies demonstrate the J-type π-π interactions among the BTBT molecules within the hydrophobic core of the self-assembled nanofibers yielding an electrical conductivity as high as 6.0 × 10-6 S cm-1. The BTBT π-core is demonstrated, for the first time, in the formation of self-assembled peptide 1D nanostructures in aqueous media for potential use in tissue engineering, bioelectronics and (opto)electronics. The conductivity achieved here is one of the highest reported to date in a non-doped state.
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Affiliation(s)
- Mohammad Aref Khalily
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
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19
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Gulseren G, Tansik G, Garifullin R, Tekinay AB, Guler MO. Dentin Phosphoprotein Mimetic Peptide Nanofibers Promote Biomineralization. Macromol Biosci 2018; 19:e1800080. [PMID: 29745025 DOI: 10.1002/mabi.201800080] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 03/22/2018] [Indexed: 12/24/2022]
Abstract
Dentin phosphoprotein (DPP) is a major component of the dentin matrix playing crucial role in hydroxyapatite deposition during bone mineralization, making it a prime candidate for the design of novel materials for bone and tooth regeneration. The bioactivity of DPP-derived proteins is controlled by the phosphorylation and dephosphorylation of the serine residues. Here an enzyme-responsive peptide nanofiber system inducing biomineralization is demonstrated. It closely emulates the structural and functional properties of DPP and facilitates apatite-like mineral deposition. The DPP-mimetic peptide molecules self-assemble through dephosphorylation by alkaline phosphatase (ALP), an enzyme participating in tooth and bone matrix mineralization. Nanofiber network formation is also induced through addition of calcium ions. The gelation process following nanofiber formation produces a mineralized extracellular matrix like material, where scaffold properties and phosphate groups promote mineralization. It is demonstrated that the DPP-mimetic peptide nanofiber networks can be used for apatite-like mineral deposition for bone regeneration.
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Affiliation(s)
- Gulcihan Gulseren
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
| | - Gulistan Tansik
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.,Department of Biomedical Engineering, Department of Pathology, DJTMF Biomedical Nanotechnology Institute, University of Miami, Coral Gables, FL, 33136, USA
| | - Ruslan Garifullin
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.,Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, 420021, Russia
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
| | - Mustafa O Guler
- Institute for Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
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20
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Cinar G, Ozdemir A, Hamsici S, Gunay G, Dana A, Tekinay AB, Guler MO. Local delivery of doxorubicin through supramolecular peptide amphiphile nanofiber gels. Biomater Sci 2018; 5:67-76. [PMID: 27819087 DOI: 10.1039/c6bm00656f] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Peptide amphiphiles (PAs) self-assemble into supramolecular nanofiber gels that provide a suitable environment for encapsulation of both hydrophobic and hydrophilic molecules. The PA gels have significant advantages for controlled delivery applications due to their high capacity to retain water, biocompatibility, and biodegradability. In this study, we demonstrate injectable supramolecular PA nanofiber gels for drug delivery applications. Doxorubicin (Dox), as a widely used chemotherapeutic drug for breast cancer treatment, was encapsulated within the PA gels prepared at different concentrations. Physical and chemical properties of the gels were characterized, and slow release of the Dox molecules through the supramolecular PA nanofiber gels was studied. In addition, the diffusion constants of the drug molecules within the PA nanofiber gels were estimated using fluorescence recovery after the photobleaching (FRAP) method. The PA nanofiber gels did not show any cytotoxicity and the encapsulation strategy enhanced the activity of drug molecules on cellular viability through prolonged release compared to direct administration under in vitro conditions. Moreover, the local in vivo injection of the Dox encapsulated PA nanofiber gels (Dox/PA) to the tumor site demonstrated the lowest tumor growth rate compared to the direct Dox injection and increased the apoptotic cells within the tumor tissue for local drug release through the PA nanofiber gels under in vivo conditions.
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Affiliation(s)
- Goksu Cinar
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Ayse Ozdemir
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Seren Hamsici
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Gokhan Gunay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Aykutlu Dana
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
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21
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Arioz I, Erol O, Bakan G, Dikecoglu FB, Topal AE, Urel M, Dana A, Tekinay AB, Guler MO. Biocompatible Electroactive Tetra(aniline)-Conjugated Peptide Nanofibers for Neural Differentiation. ACS Appl Mater Interfaces 2018; 10:308-317. [PMID: 29232108 DOI: 10.1021/acsami.7b16509] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Peripheral nerve injuries cause devastating problems for the quality of patients' lives, and regeneration following damage to the peripheral nervous system is limited depending on the degree of the damage. Use of nanobiomaterials can provide therapeutic approaches for the treatment of peripheral nerve injuries. Electroactive biomaterials, in particular, can provide a promising cure for the regeneration of nerve defects. Here, a supramolecular electroactive nanosystem with tetra(aniline) (TA)-containing peptide nanofibers was developed and utilized for nerve regeneration. Self-assembled TA-conjugated peptide nanofibers demonstrated electroactive behavior. The electroactive self-assembled peptide nanofibers formed a well-defined three-dimensional nanofiber network mimicking the extracellular matrix of the neuronal cells. Neurite outgrowth was improved on the electroactive TA nanofiber gels. The neural differentiation of PC-12 cells was more advanced on electroactive peptide nanofiber gels, and these biomaterials are promising for further use in therapeutic neural regeneration applications.
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Affiliation(s)
| | - Ozlem Erol
- School of Chemistry, University of Bristol , Bristol BS8 1TS, U.K
| | - Gokhan Bakan
- Department of Electrical and Electronics Engineering, Atilim University , Ankara 06836, Turkey
| | | | | | | | | | | | - Mustafa O Guler
- Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States
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22
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Ozkan AD, Topal AE, Dikecoglu FB, Guler MO, Dana A, Tekinay AB. Probe microscopy methods and applications in imaging of biological materials. Semin Cell Dev Biol 2018; 73:153-164. [DOI: 10.1016/j.semcdb.2017.08.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/04/2017] [Accepted: 08/04/2017] [Indexed: 01/21/2023]
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23
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Beter M, Kara HK, Topal AE, Dana A, Tekinay AB, Guler MO. Multivalent Presentation of Cationic Peptides on Supramolecular Nanofibers for Antimicrobial Activity. Mol Pharm 2017; 14:3660-3668. [DOI: 10.1021/acs.molpharmaceut.7b00434] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mustafa Beter
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Hatice K. Kara
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Ahmet E. Topal
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Aykutlu Dana
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Ayse B. Tekinay
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
- Neuroscience
Graduate Program, Bilkent University, Ankara 06800, Turkey
| | - Mustafa O. Guler
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
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24
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Gunay G, Sever M, Tekinay AB, Guler MO. Three-Dimensional Laminin Mimetic Peptide Nanofiber Gels for In Vitro Neural Differentiation. Biotechnol J 2017; 12. [PMID: 28786563 DOI: 10.1002/biot.201700080] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/26/2017] [Indexed: 11/08/2022]
Abstract
The extracellular matrix (ECM) provides biochemical signals and structural support for cells, and its functional imitation is a fundamental aspect of biomaterial design for regenerative medicine applications. The stimulation of neural differentiation by a laminin protein-derived epitope in two-dimensional (2D) and three-dimensional (3D) environments is investigated. The 3D gel system is found to be superior to its 2D counterpart for the induction of neural differentiation, even in the absence of a crucial biological inducer in nerve growth factor (NGF). In addition, cells cultured in 3D gels exhibits a spherical morphology that is consistent with their form under in vivo conditions. Overall, the present study underlines the impact of bioactivity, dimension, and NGF addition, as well as the cooperative effects thereof, on the neural differentiation of PC-12 cells. These results underline the significance of 3D culture systems in the development of scaffolds that closely replicate in vivo environments for the formation of cellular organoid models in vitro.
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Affiliation(s)
- Gokhan Gunay
- Neuroscience Graduate Program, Bilkent University, Ankara, Turkey
| | - Melike Sever
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, Turkey
| | - Ayse B Tekinay
- Neuroscience Graduate Program, Bilkent University, Ankara, Turkey.,Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, Turkey.,Institute for Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
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25
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Eren Cimenci C, Uzunalli G, Uysal O, Yergoz F, Karaca Umay E, Guler MO, Tekinay AB. Laminin mimetic peptide nanofibers regenerate acute muscle defect. Acta Biomater 2017; 60:190-200. [PMID: 28690008 DOI: 10.1016/j.actbio.2017.07.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 06/30/2017] [Accepted: 07/05/2017] [Indexed: 02/08/2023]
Abstract
Skeletal muscle cells are terminally differentiated and require the activation of muscle progenitor (satellite) cells for their regeneration. There is a clinical need for faster and more efficient treatment methods for acute muscle injuries, and the stimulation of satellite cell proliferation is promising in this context. In this study, we designed and synthesized a laminin-mimetic bioactive peptide (LM/E-PA) system that is capable of accelerating satellite cell activation by emulating the structure and function of laminin, a major protein of the basal membrane of the skeletal muscle. The LM/E-PA nanofibers enhance myogenic differentiation in vitro and the clinical relevance of the laminin-mimetic bioactive scaffold system was demonstrated further by assessing its effect on the regeneration of acute muscle injury in a rat model. Laminin mimetic peptide nanofibers significantly promoted satellite cell activation in skeletal muscle and accelerated myofibrillar regeneration following acute muscle injury. In addition, the LM/E-PA scaffold treatment significantly reduced the time required for the structural and functional repair of skeletal muscle. This study represents one of the first examples of molecular- and tissue-level regeneration of skeletal muscle facilitated by bioactive peptide nanofibers following acute muscle injury. SIGNIFICANCE STATEMENT Sports, heavy lifting and other strength-intensive tasks are ubiquitous in modern life and likely to cause acute skeletal muscle injury. Speeding up regeneration of skeletal muscle injuries would not only shorten the duration of recovery for the patient, but also support the general health and functionality of the repaired muscle tissue. In this work, we designed and synthesized a laminin-mimetic nanosystem to enhance muscle regeneration. We tested its activity in a rat tibialis anterior muscle by injecting the bioactive nanosystem. The evaluation of the regeneration and differentiation capacity of skeletal muscle suggested that the laminin-mimetic nanosystem enhances skeletal muscle regeneration and provides a suitable platform that is highly promising for the regeneration of acute muscle injuries. This work demonstrates for the first time that laminin-mimetic self-assembled peptide nanosystems facilitate myogenic differentiation in vivo without the need for additional treatment.
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Affiliation(s)
- Cagla Eren Cimenci
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey; Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey
| | - Gozde Uzunalli
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey; Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey
| | - Ozge Uysal
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey; Neuroscience Graduate Program, Bilkent University, Ankara 06800, Turkey
| | - Fatih Yergoz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey; Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey
| | - Ebru Karaca Umay
- Diskapi Yildirim Beyazit Training and Research Hospital, Physical Medicine and Rehabilitation Clinic, Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey; Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey.
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26
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Arslan E, Hatip Koc M, Uysal O, Dikecoglu B, Topal AE, Garifullin R, Ozkan AD, Dana A, Hermida-Merino D, Castelletto V, Edwards-Gayle C, Baday S, Hamley I, Tekinay AB, Guler MO. Supramolecular Peptide Nanofiber Morphology Affects Mechanotransduction of Stem Cells. Biomacromolecules 2017; 18:3114-3130. [PMID: 28840715 DOI: 10.1021/acs.biomac.7b00773] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chirality and morphology are essential factors for protein function and interactions with other biomacromolecules. Extracellular matrix (ECM) proteins are also similar to other proteins in this sense; however, the complexity of the natural ECM makes it difficult to study these factors at the cellular level. The synthetic peptide nanomaterials harbor great promise in mimicking specific ECM molecules as model systems. In this work, we demonstrate that mechanosensory responses of stem cells are directly regulated by the chirality and morphology of ECM-mimetic peptide nanofibers with strictly controlled characteristics. Structural signals presented on l-amino acid containing cylindrical nanofibers (l-VV) favored the formation of integrin β1-based focal adhesion complexes, which increased the osteogenic potential of stem cells through the activation of nuclear YAP. On the other hand, twisted ribbon-like nanofibers (l-FF and d-FF) guided the cells into round shapes and decreased the formation of focal adhesion complexes, which resulted in the confinement of YAP proteins in the cytosol and a corresponding decrease in osteogenic potential. Interestingly, the d-form of twisted-ribbon like nanofibers (d-FF) increased the chondrogenic potential of stem cells more than their l-form (l-FF). Our results provide new insights into the importance and relevance of morphology and chirality of nanomaterials in their interactions with cells and reveal that precise control over the chemical and physical properties of nanostructures can affect stem cell fate even without the incorporation of specific epitopes.
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Affiliation(s)
| | | | | | | | | | - Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University , 420021 Kazan, Russian Federation
| | | | | | | | - Valeria Castelletto
- Department of Chemistry, University of Reading , Whiteknights, Reading RG6 6AD, U.K
| | | | - Sefer Baday
- Applied Informatics Department, Informatics Institute, Istanbul Technical University , Istanbul 34469, Turkey
| | - Ian Hamley
- Department of Chemistry, University of Reading , Whiteknights, Reading RG6 6AD, U.K
| | | | - Mustafa O Guler
- Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States
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27
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Hatip Koc M, Cinar Ciftci G, Baday S, Castelletto V, Hamley IW, Guler MO. Hierarchical Self-Assembly of Histidine-Functionalized Peptide Amphiphiles into Supramolecular Chiral Nanostructures. Langmuir 2017; 33:7947-7956. [PMID: 28753315 DOI: 10.1021/acs.langmuir.7b01266] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Controlling the hierarchical organization of self-assembling peptide amphiphiles into supramolecular nanostructures opens up the possibility of developing biocompatible functional supramolecular materials for various applications. In this study, we show that the hierarchical self-assembly of histidine- (His-) functionalized PAs containing d- or l-amino acids can be controlled by both solution pH and molecular chirality of the building blocks. An increase in solution pH resulted in the structural transition of the His-functionalized chiral PA assemblies from nanosheets to completely closed nanotubes through an enhanced hydrogen-bonding capacity and π-π stacking of imidazole ring. The effects of the stereochemistry and amino acid sequence of the PA backbone on the supramolecular organization were also analyzed by CD, TEM, SAXS, and molecular dynamics simulations. In addition, an investigation of chiral mixtures revealed the differences between the hydrogen-bonding capacities and noncovalent interactions of PAs with d- and l-amino acids.
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Affiliation(s)
- Meryem Hatip Koc
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, 06800 Turkey
| | - Goksu Cinar Ciftci
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, 06800 Turkey
| | - Sefer Baday
- Applied Informatics Department, Informatics Institute, Istanbul Technical University , Istanbul, 34469 Turkey
| | - Valeria Castelletto
- Department of Chemistry, University of Reading , Whiteknights, Reading RG6 6AD, U.K
| | - Ian W Hamley
- Department of Chemistry, University of Reading , Whiteknights, Reading RG6 6AD, U.K
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, 06800 Turkey
- Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637 United States
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Rufaihah AJ, Yasa IC, Ramanujam VS, Arularasu SC, Kofidis T, Guler MO, Tekinay AB. Angiogenic peptide nanofibers repair cardiac tissue defect after myocardial infarction. Acta Biomater 2017; 58:102-112. [PMID: 28600129 DOI: 10.1016/j.actbio.2017.06.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 06/01/2017] [Accepted: 06/05/2017] [Indexed: 12/11/2022]
Abstract
Myocardial infarction remains one of the top leading causes of death in the world and the damage sustained in the heart eventually develops into heart failure. Limited conventional treatment options due to the inability of the myocardium to regenerate after injury and shortage of organ donors require the development of alternative therapies to repair the damaged myocardium. Current efforts in repairing damage after myocardial infarction concentrates on using biologically derived molecules such as growth factors or stem cells, which carry risks of serious side effects including the formation of teratomas. Here, we demonstrate that synthetic glycosaminoglycan (GAG) mimetic peptide nanofiber scaffolds induce neovascularization in cardiovascular tissue after myocardial infarction, without the addition of any biologically derived factors or stem cells. When the GAG mimetic nanofiber gels were injected in the infarct site of rodent myocardial infarct model, increased VEGF-A expression and recruitment of vascular cells was observed. This was accompanied with significant degree of neovascularization and better cardiac performance when compared to the control saline group. The results demonstrate the potential of future clinical applications of these bioactive peptide nanofibers as a promising strategy for cardiovascular repair. STATEMENT OF SIGNIFICANCE We present a synthetic bioactive peptide nanofiber system can enhance cardiac function and enhance cardiovascular regeneration after myocardial infarction (MI) without the addition of growth factors, stem cells or other biologically derived molecules. Current state of the art in cardiac repair after MI utilize at least one of the above mentioned biologically derived molecules, thus our approach is ground-breaking for cardiovascular therapy after MI. In this work, we showed that synthetic glycosaminoglycan (GAG) mimetic peptide nanofiber scaffolds induce neovascularization and cardiomyocyte differentiation for the regeneration of cardiovascular tissue after myocardial infarction in a rat infarct model. When the peptide nanofiber gels were injected in infarct site at rodent myocardial infarct model, recruitment of vascular cells was observed, neovascularization was significantly induced and cardiac performance was improved. These results demonstrate the potential of future clinical applications of these bioactive peptide nanofibers as a promising strategy for cardiovascular repair.
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Khalily MA, Bakan G, Kucukoz B, Topal AE, Karatay A, Yaglioglu HG, Dana A, Guler MO. Fabrication of Supramolecular n/p-Nanowires via Coassembly of Oppositely Charged Peptide-Chromophore Systems in Aqueous Media. ACS Nano 2017; 11:6881-6892. [PMID: 28679051 DOI: 10.1021/acsnano.7b02025] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fabrication of supramolecular electroactive materials at the nanoscale with well-defined size, shape, composition, and organization in aqueous medium is a current challenge. Herein we report construction of supramolecular charge-transfer complex one-dimensional (1D) nanowires consisting of highly ordered mixed-stack π-electron donor-acceptor (D-A) domains. We synthesized n-type and p-type β-sheet forming short peptide-chromophore conjugates, which assemble separately into well-ordered nanofibers in aqueous media. These complementary p-type and n-type nanofibers coassemble via hydrogen bonding, charge-transfer complex, and electrostatic interactions to generate highly uniform supramolecular n/p-coassembled 1D nanowires. This molecular design ensures highly ordered arrangement of D-A stacks within n/p-coassembled supramolecular nanowires. The supramolecular n/p-coassembled nanowires were found to be formed by A-D-A unit cells having an association constant (KA) of 5.18 × 105 M-1. In addition, electrical measurements revealed that supramolecular n/p-coassembled nanowires are approximately 2400 and 10 times more conductive than individual n-type and p-type nanofibers, respectively. This facile strategy allows fabrication of well-defined supramolecular electroactive nanomaterials in aqueous media, which can find a variety of applications in optoelectronics, photovoltaics, organic chromophore arrays, and bioelectronics.
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Affiliation(s)
- Mohammad Aref Khalily
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Gokhan Bakan
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
- Department of Electrical and Electronics Engineering, Atilim University , Ankara 06836, Turkey
| | - Betul Kucukoz
- Department of Physics Engineering, Ankara University , Ankara 06100, Turkey
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology , 41296 Gothenburg, Sweden
| | - Ahmet Emin Topal
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Ahmet Karatay
- Department of Physics Engineering, Ankara University , Ankara 06100, Turkey
| | - H Gul Yaglioglu
- Department of Physics Engineering, Ankara University , Ankara 06100, Turkey
| | - Aykutlu Dana
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
- Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States
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30
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Gunay G, Sardan Ekiz M, Ferhati X, Richichi B, Nativi C, Tekinay AB, Guler MO. Antigenic GM3 Lactone Mimetic Molecule Integrated Mannosylated Glycopeptide Nanofibers for the Activation and Maturation of Dendritic Cells. ACS Appl Mater Interfaces 2017; 9:16035-16042. [PMID: 28445638 DOI: 10.1021/acsami.7b04094] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The ability of dendritic cells to coordinate innate and adaptive immune responses makes them essential targets for vaccination strategies. Presentation of specific antigens by dendritic cells is required for the activation of the immune system against many pathogens and tumors, and nanoscale materials can be functionalized for active targeting of dendritic cells. In this work, we integrated an immunogenic, carbohydrate melanoma-associated antigen-mimetic GM3-lactone molecule into mannosylated peptide amphiphile nanofibers to target dendritic cells through DC-SIGN receptor. Based on morphological and functional analyses, when dendritic cells were treated with peptide nanofiber carriers, they showed significant increase in antigen internalization and a corresponding increase in the surface expression of the activation and maturation markers CD86, CD83 and HLA-DR, in addition to exhibiting a general morphology consistent with dendritic cell maturation. These results indicate that mannosylated peptide amphiphile nanofiber carriers are promising candidates to target dendritic cells for antigen delivery.
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Affiliation(s)
- Gokhan Gunay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
- Neuroscience Graduate Program, Bilkent University , Ankara 06800, Turkey
| | - Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Xhenti Ferhati
- Department of Chemistry "Ugo Schiff", University of Florence , Sesto Fiorentino, Florence 50019, Italy
| | - Barbara Richichi
- Department of Chemistry "Ugo Schiff", University of Florence , Sesto Fiorentino, Florence 50019, Italy
| | - Cristina Nativi
- Department of Chemistry "Ugo Schiff", University of Florence , Sesto Fiorentino, Florence 50019, Italy
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
- Neuroscience Graduate Program, Bilkent University , Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
- Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States
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Abstract
Peptide nanomaterials have received a great deal of interest in drug-delivery applications due to their biodegradability, biocompatibility, suitability for large-scale synthesis, high drug-loading capacities, targeting ability, and ordered structural organization. The covalent conjugation of drugs to peptide backbones results in prolonged circulation time and improved stability of drugs. Therapeutic efficacy of gemcitabine, which is used for breast cancer treatment, is severely compromised due to its rapid plasma degradation. Its hydrophilic nature poses a challenge for both its efficient encapsulation into nanocarrier systems and its sustained release property. Here, we designed a new peptide prodrug molecule for the anticancer drug gemcitabine, which was covalently conjugated to the C-terminal of 9-fluorenylmethoxy carbonyl (Fmoc)-protected glycine. The prodrug was further integrated into peptide nanocarrier system through noncovalent interactions. A pair of oppositely charged amyloid-inspired peptides (Fmoc-AIPs) were exploited as components of the drug-carrier system and self-assembled into one-dimensional nanofibers at physiological conditions. The gemcitabine integrated nanoprodrug carrier system exhibited slow release and reduced the cellular viability of 4T1 breast cancer cell line in a time- and concentration-dependent manner.
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Affiliation(s)
- Seren Hamsici
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, Turkey 06800
| | - Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, Turkey 06800
| | - Goksu Cinar Ciftci
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, Turkey 06800
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, Turkey 06800
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara, Turkey 06800.,Institute for Molecular Engineering, University of Chicago , Chicago, Illinois 60637, United States
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Tohumeken S, Gunduz N, Demircan MB, Gunay G, Topal AE, Khalily MA, Tekinay T, Dana A, Guler MO, Tekinay AB. A Modular Antigen Presenting Peptide/Oligonucleotide Nanostructure Platform for Inducing Potent Immune Response. ACTA ACUST UNITED AC 2017; 1:e1700015. [DOI: 10.1002/adbi.201700015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/20/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Sehmus Tohumeken
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Nuray Gunduz
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - M. Burak Demircan
- Neuroscience Graduate Program; Bilkent University; Ankara 06800 Turkey
| | - Gokhan Gunay
- Neuroscience Graduate Program; Bilkent University; Ankara 06800 Turkey
| | - Ahmet E. Topal
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - M. Aref Khalily
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Turgay Tekinay
- Life Sciences Application and Research Center; Gazi University; Ankara 06830 Turkey
| | - Aykutlu Dana
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Mustafa O. Guler
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
- Institute for Molecular Engineering; University of Chicago; Chicago IL 60637 USA
| | - Ayse B. Tekinay
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
- Neuroscience Graduate Program; Bilkent University; Ankara 06800 Turkey
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Yasa O, Uysal O, Ekiz MS, Guler MO, Tekinay AB. Presentation of functional groups on self-assembled supramolecular peptide nanofibers mimicking glycosaminoglycans for directed mesenchymal stem cell differentiation. J Mater Chem B 2017; 5:4890-4900. [DOI: 10.1039/c7tb00708f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organizational complexity and functional diversity of the extracellular matrix regulate cellular behaviors.
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Affiliation(s)
- Oncay Yasa
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara 06800
- Turkey
| | - Ozge Uysal
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara 06800
- Turkey
| | - Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara 06800
- Turkey
| | - Mustafa O. Guler
- Institute for Molecular Engineering
- University of Chicago
- Chicago
- USA
| | - Ayse B. Tekinay
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara 06800
- Turkey
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34
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Senturk B, Demircan BM, Ozkan AD, Tohumeken S, Delibasi T, Guler MO, Tekinay AB. Diabetic wound regeneration using heparin-mimetic peptide amphiphile gel in db/db mice. Biomater Sci 2017; 5:1293-1303. [DOI: 10.1039/c7bm00251c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
There is an urgent need for more efficient treatment of chronic wounds in diabetic patients especially with a high risk of leg amputation.
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Affiliation(s)
- Berna Senturk
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara, 06800
- Turkey
| | | | - Alper D. Ozkan
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara, 06800
- Turkey
| | - Sehmus Tohumeken
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara, 06800
- Turkey
| | - Tuncay Delibasi
- ADACELL Cell Therapy
- Regenerative Medicine and Research Hospital Etlik Polyclinic
- Department of Endocrinology and Metabolism
- Ankara, 06010
- Turkey
| | - Mustafa O. Guler
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara, 06800
- Turkey
| | - Ayse B. Tekinay
- Institute of Materials Science and Nanotechnology
- National Nanotechnology Research Center (UNAM)
- Bilkent University
- Ankara, 06800
- Turkey
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Abstract
Cartilaginous tissue requires structural and metabolic support after traumatic or chronic injuries because of its limited capacity for regeneration. However, current techniques for cartilage regeneration are either invasive or ineffective for long-term repair. Developing alternative approaches to regenerate cartilage tissue is needed. Therefore, versatile scaffolds formed by biomaterials are promising tools for cartilage regeneration. Bioactive scaffolds further enhance the utility in a broad range of applications including the treatment of major cartilage defects. This chapter provides an overview of cartilage tissue, tissue defects, and the methods used for regeneration, with emphasis on peptide scaffold materials that can be used to supplement or replace current medical treatment options.
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Affiliation(s)
- Nurcan Hastar
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
| | - Elif Arslan
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey
- Institute for Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
- Neuroscience Graduate Program, Bilkent University, Ankara, 06800, Turkey.
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Hamsici S, Cinar G, Celebioglu A, Uyar T, Tekinay AB, Guler MO. Bioactive peptide functionalized aligned cyclodextrin nanofibers for neurite outgrowth. J Mater Chem B 2016; 5:517-524. [PMID: 32263668 DOI: 10.1039/c6tb02441f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Guidance of neurite extension and establishment of neural connectivity hold great importance for neural tissue regeneration and neural conduit implants. Although bioactive-epitope functionalized synthetic or natural polymeric materials have been proposed for the induction of neural regeneration, chemical modifications of these materials for neural differentiation still remain a challenge due to the harsh conditions of chemical reactions, along with non-homogeneous surface modifications. In this study, a facile noncovalent functionalization method is proposed by exploiting host-guest interactions between an adamantane-conjugated laminin derived bioactive IKVAV epitope and electrospun cyclodextrin nanofibers (CDNFs) to fabricate implantable scaffolds for peripheral nerve regeneration. While electrospun CDNFs introduce a three-dimensional biocompatible microenvironment to promote cellular viability and adhesion, the bioactive epitopes presented on the surface of electrospun CDNFs guide the cellular differentiation of PC-12 cells. In addition to materials synthesis and smart functionalization, physical alignment of the electrospun nanofibers guides the cells for enhanced differentiation. Cells cultured on aligned and IKVAV functionalized electrospun CDNFs had significantly higher expression of neuron-specific βIII-tubulin and synaptophysin. The neurite extension is also higher on the bioactive aligned scaffolds compared to random and non-functionalized electrospun CDNFs. Both chemical and physical cues were utilized for an effective neuronal differentiation process.
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Affiliation(s)
- Seren Hamsici
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey.
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Caliskan OS, Sardan Ekiz M, Tekinay AB, Guler MO. Spatial Organization of Functional Groups on Bioactive Supramolecular Glycopeptide Nanofibers for Differentiation of Mesenchymal Stem Cells (MSCs) to Brown Adipogenesis. Bioconjug Chem 2016; 28:740-750. [DOI: 10.1021/acs.bioconjchem.6b00632] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ozum S. Caliskan
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
| | - Melis Sardan Ekiz
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
| | - Ayse B. Tekinay
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
| | - Mustafa O. Guler
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800 Ankara, Turkey
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Sever M, Turkyilmaz M, Sevinc C, Cakir A, Ocalan B, Cansev M, Guler MO, Tekinay AB. Regenerative effects of peptide nanofibers in an experimental model of Parkinson's disease. Acta Biomater 2016; 46:79-90. [PMID: 27619838 DOI: 10.1016/j.actbio.2016.09.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 09/07/2016] [Accepted: 09/08/2016] [Indexed: 01/25/2023]
Abstract
Parkinson's disease (PD) is characterized by progressive degeneration of dopaminergic nigrostriatal neurons and reduction in striatal dopamine levels. Although there are few treatment options for PD such as Levodopa, they are used just to relieve and modify the symptoms. There are no therapies available for PD to slow down the degeneration process in the brain and recover the lost function. In this study, we used extracellular matrix (ECM) mimetic peptide amphiphile (PA) nanofibers as a potential therapeutic approach in a PD rat model. We demonstrated the effect of heparan sulfate mimetic and laminin mimetic PA nanofibers on reducing striatal injury and enhancing functional recovery after unilateral striatal injection of 6-hydroxydopamine (6-OHDA). The bioactive self-assembled PA nanofibers significantly reduced forelimb asymmetry, contralateral forelimb akinesia and d-amphetamine-induced rotational behavior in cylinder, stepping and rotation tests, respectively, in 6-OHDA-lesioned rats after 6 weeks. The behavioral improvement with PA nanofiber administration was associated with enhanced striatal dopamine and tyrosine hydroxylase content as well as reduced cleaved-Caspase-3 levels. Histological assessment also showed that PA nanofiber injection to the striatum resulted in better tissue integrity compared to control groups. In addition, PA nanofibers reduced the progressive cell loss in SH-SY5Y cells caused by 6-OHDA treatment. These data showed that the bioactive peptide nanofibers improve neurochemical and behavioral consequences of Parkinsonism in rats and provide a promising new strategy for treatment of PD. STATEMENT OF SIGNIFICANCE Biomimetic nanomaterials bearing natural bioactive signals which are derived from extracellular matrix components like laminin and heparan sulfates provide promising therapeutic strategies for regeneration of the nervous system. However, no research has been reported exploring the use of biomimetic materials against degeneration in Parkinson's disease. In this work, we investigated potential therapeutic effects of heparan sulfate and laminin mimetic PA nanofibers on reduction of striatal injury in experimental Parkinson's disease model. PA nanofibers enhanced functional recovery associated with enhanced striatal dopamine and tyrosine hydroxylase content as well as reduced cleaved-Caspase-3 levels. Overall, this study shows the improvement in consequences of Parkinsonism in rats and provides a new platform for treatment of Parkinson's disease.
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Affiliation(s)
- Melike Sever
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey.
| | - Mesut Turkyilmaz
- Department of Pharmacology, Uludag University School of Medicine, Bursa 16059, Turkey.
| | - Cansu Sevinc
- Department of Pharmacology, Uludag University School of Medicine, Bursa 16059, Turkey.
| | - Aysen Cakir
- Department of Physiology, Uludag University School of Medicine, Bursa 16059, Turkey.
| | - Busra Ocalan
- Department of Physiology, Uludag University School of Medicine, Bursa 16059, Turkey.
| | - Mehmet Cansev
- Department of Pharmacology, Uludag University School of Medicine, Bursa 16059, Turkey.
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey.
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey.
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Abstract
Nature is an important inspirational source for scientists, and presents complex and elegant examples of adaptive and intelligent systems created by self-assembly. Significant effort has been devoted to understanding these sophisticated systems. The self-assembly process enables us to create supramolecular nanostructures with high order and complexity, and peptide-based self-assembling building blocks can serve as suitable platforms to construct nanostructures showing diverse features and applications. In this review, peptide-based supramolecular assemblies will be discussed in terms of their synthesis, design, characterization and application. Peptide nanostructures are categorized based on their chemical and physical properties and will be examined by rationalizing the influence of peptide design on the resulting morphology and the methods employed to characterize these high order complex systems. Moreover, the application of self-assembled peptide nanomaterials as functional materials in information technologies and environmental sciences will be reviewed by providing examples from recently published high-impact studies.
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Affiliation(s)
- Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800 Turkey
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40
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Khalily MA, Eren H, Akbayrak S, Susapto HH, Biyikli N, Özkar S, Guler MO. Facile Synthesis of Three-Dimensional Pt-TiO2
Nano-networks: A Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia-Borane. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605577] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammad Aref Khalily
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Hamit Eren
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Serdar Akbayrak
- Department of Chemistry; Middle East Technical University; Ankara 06800 Turkey
| | - Hepi Hari Susapto
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Necmi Biyikli
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Saim Özkar
- Department of Chemistry; Middle East Technical University; Ankara 06800 Turkey
| | - Mustafa O. Guler
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
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Khalily MA, Eren H, Akbayrak S, Susapto HH, Biyikli N, Özkar S, Guler MO. Facile Synthesis of Three-Dimensional Pt-TiO2
Nano-networks: A Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia-Borane. Angew Chem Int Ed Engl 2016; 55:12257-61. [DOI: 10.1002/anie.201605577] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/28/2016] [Indexed: 02/03/2023]
Affiliation(s)
- Mohammad Aref Khalily
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Hamit Eren
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Serdar Akbayrak
- Department of Chemistry; Middle East Technical University; Ankara 06800 Turkey
| | - Hepi Hari Susapto
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Necmi Biyikli
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
| | - Saim Özkar
- Department of Chemistry; Middle East Technical University; Ankara 06800 Turkey
| | - Mustafa O. Guler
- Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
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Susapto HH, Kudu OU, Garifullin R, Yılmaz E, Guler MO. One-Dimensional Peptide Nanostructure Templated Growth of Iron Phosphate Nanostructures for Lithium-Ion Battery Cathodes. ACS Appl Mater Interfaces 2016; 8:17421-17427. [PMID: 27315038 DOI: 10.1021/acsami.6b02528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Template-directed synthesis of nanomaterials can provide benefits such as small crystalline size, high surface area, large surface-to-volume ratio, and structural stability. These properties are important for shorter distance in ion/electron movement and better electrode surface/electrolyte contact for energy storage applications. Here nanostructured FePO4 cathode materials were synthesized by using peptide nanostructures as a template inspired by biomineralization process. The amorphous, high surface area FePO4 nanostructures were utilized as a cathode for lithium-ion batteries. Discharge capacity of 155 mAh/g was achieved at C/20 current rate. The superior properties of biotemplated and nanostructured amorphous FePO4 are shown compared to template-free crystalline FePO4.
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Affiliation(s)
- Hepi Hari Susapto
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University , Ankara 06800, Turkey
| | - O Ulas Kudu
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University , Ankara 06800, Turkey
| | - Ruslan Garifullin
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University , Ankara 06800, Turkey
- Kazan Federal University , Institute of Fundamental Medicine and Biology, 18 Kremlyovskaya St., 420008 Kazan, Russian Federation
| | - Eda Yılmaz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University , Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University , Ankara 06800, Turkey
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Cinar G, Orujalipoor I, Su CJ, Jeng US, Ide S, Guler MO. Supramolecular Nanostructure Formation of Coassembled Amyloid Inspired Peptides. Langmuir 2016; 32:6506-6514. [PMID: 27267733 DOI: 10.1021/acs.langmuir.6b00704] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Characterization of amyloid-like aggregates through converging approaches can yield deeper understanding of their complex self-assembly mechanisms and the nature of their strong mechanical stability, which may in turn contribute to the design of novel supramolecular peptide nanostructures as functional materials. In this study, we investigated the coassembly kinetics of oppositely charged short amyloid-inspired peptides (AIPs) into supramolecular nanostructures by using confocal fluorescence imaging of thioflavin T binding, turbidity assay and in situ small-angle X-ray scattering (SAXS) analysis. We showed that coassembly kinetics of the AIP nanostructures were consistent with nucleation-dependent amyloid-like aggregation, and aggregation behavior of the AIPs was affected by the initial monomer concentration and sonication. Moreover, SAXS analysis was performed to gain structural information on the size, shape, electron density, and internal organization of the coassembled AIP nanostructures. The scattering data of the coassembled AIP nanostructures were best fitted into to a combination of polydisperse core-shell cylinder (PCSC) and decoupling flexible cylinder (FCPR) models, and the structural parameters were estimated based on the fitting results of the scattering data. The stability of the coassembled AIP nanostructures in both fiber organization and bulk viscoelastic properties was also revealed via temperature-dependent SAXS analysis and oscillatory rheology measurements, respectively.
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Affiliation(s)
- Goksu Cinar
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , 06800 Ankara, Turkey
| | - Ilghar Orujalipoor
- Department of Nanotechnology and Nanoscience, Hacettepe University , 06800 Beytepe, Ankara, Turkey
| | - Chun-Jen Su
- National Synchrotron Radiation Research Center , 101 Hsin-Ann Road, Hsinchu Park, Hsinchu, Taiwan
| | - U-Ser Jeng
- National Synchrotron Radiation Research Center , 101 Hsin-Ann Road, Hsinchu Park, Hsinchu, Taiwan
| | - Semra Ide
- Department of Nanotechnology and Nanoscience, Hacettepe University , 06800 Beytepe, Ankara, Turkey
- Department of Physics Engineering, Hacettepe University , 06800 Beytepe, Ankara, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , 06800 Ankara, Turkey
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Uzunalli G, Mammadov R, Yesildal F, Alhan D, Ozturk S, Ozgurtas T, Guler MO, Tekinay AB. Angiogenic Heparin-Mimetic Peptide Nanofiber Gel Improves Regenerative Healing of Acute Wounds. ACS Biomater Sci Eng 2016; 3:1296-1303. [DOI: 10.1021/acsbiomaterials.6b00165] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Gozde Uzunalli
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara, Turkey 06800
| | - Rashad Mammadov
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara, Turkey 06800
| | - Fatih Yesildal
- Department
of Medical Biochemistry, Diyarbakir Military Hospital, Diyarbakir, Turkey
| | - Dogan Alhan
- Gulhane Military Medical Academy, Ankara, Turkey
| | | | | | - Mustafa O. Guler
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara, Turkey 06800
| | - Ayse B. Tekinay
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara, Turkey 06800
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Gulseren G, Khalily MA, Tekinay AB, Guler MO. Catalytic supramolecular self-assembled peptide nanostructures for ester hydrolysis. J Mater Chem B 2016; 4:4605-4611. [PMID: 32263403 DOI: 10.1039/c6tb00795c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Essential amino acids in catalytic sites of native enzymes are important in nature inspired catalyst designs. Active sites of enzymes contain the coordinated assembly of multiple amino acids, and catalytic action is generated by the dynamic interactions among multiple residues. However, catalysis studies are limited by the complex and dynamic structure of the enzyme; and it is difficult to exclusively attribute a given function to a specific residue. Minimalistic approaches involving artificial catalytic sites are promising for the investigation of the enzyme function in the absence of non-essential protein components, and self-assembling peptide nanostructures are especially advantageous in this context. Here we demonstrate the design and characterization of an enzyme-mimetic catalytic nanosystem presenting essential residues (Ser, His, Asp). The function of each residue and its combinations on the nanostructures in hydrolysis reaction was studied. The catalytic self-assembled nanostructures were used for efficient ester hydrolysis such as a model substrate (pNPA) and a natural substrate (acetylcholine) highlighting the key role of self-assembly in catalytic domain formation to test the efficiency of the de novo designed catalyst as a catalytic triad model.
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Affiliation(s)
- Gulcihan Gulseren
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
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Senturk B, Mercan S, Delibasi T, Guler MO, Tekinay AB. Angiogenic Peptide Nanofibers Improve Wound Healing in STZ-Induced Diabetic Rats. ACS Biomater Sci Eng 2016; 2:1180-1189. [DOI: 10.1021/acsbiomaterials.6b00238] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Berna Senturk
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Sercan Mercan
- Department
of Endocrinology and Metabolism, ADACELL Cell Therapy, Regenerative Medicine and Research Hospital Etlik Polyclinic, Ankara, 06010, Turkey
| | - Tuncay Delibasi
- Department
of Endocrinology and Metabolism, ADACELL Cell Therapy, Regenerative Medicine and Research Hospital Etlik Polyclinic, Ankara, 06010, Turkey
- Department
of Internal Medicine, School of Medicine (Kastamonu), Hacettepe University, Ankara, 06100, Turkey
| | - Mustafa O. Guler
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Ayse B. Tekinay
- Institute
of Materials Science and Nanotechnology, National Nanotechnology Research
Center (UNAM), Bilkent University, Ankara 06800, Turkey
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Mumcuoglu D, Sardan Ekiz M, Gunay G, Tekinay T, Tekinay AB, Guler MO. Cellular Internalization of Therapeutic Oligonucleotides by Peptide Amphiphile Nanofibers and Nanospheres. ACS Appl Mater Interfaces 2016; 8:11280-11287. [PMID: 27097153 DOI: 10.1021/acsami.6b01526] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Oligonucleotides are promising drug candidates due to the exceptionally high specificity they exhibit toward their target DNA and RNA sequences. However, their poor pharmacokinetic and pharmacodynamic properties, in conjunction with problems associated with their internalization by cells, necessitates their delivery through specialized carrier systems for efficient therapy. Here, we investigate the effects of carrier morphology on the cellular internalization mechanisms of oligonucleotides by using self-assembled fibrous or spherical peptide nanostructures. Size and geometry were both found to be important parameters for the oligonucleotide internalization process; direct penetration was determined to be the major mechanism for the internalization of nanosphere carriers, whereas nanofibers were internalized by clathrin- and dynamin-dependent endocytosis pathways. We further showed that glucose conjugation to carrier nanosystems improved cellular internalization in cancer cells due to the enhanced glucose metabolism associated with oncogenesis, and the internalization of the glucose-conjugated peptide/oligonucleotide complexes was found to be dependent on glucose transporters present on the surface of the cell membrane.
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Affiliation(s)
- Didem Mumcuoglu
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Gokhan Gunay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | | | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
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Yaylaci SU, Sen M, Bulut O, Arslan E, Guler MO, Tekinay AB. Chondrogenic Differentiation of Mesenchymal Stem Cells on Glycosaminoglycan-Mimetic Peptide Nanofibers. ACS Biomater Sci Eng 2016; 2:871-878. [DOI: 10.1021/acsbiomaterials.6b00099] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seher Ustun Yaylaci
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Merve Sen
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Ozlem Bulut
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Elif Arslan
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Mustafa O. Guler
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
| | - Ayse B. Tekinay
- Institute of Materials Science
and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara 06800, Turkey
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Arslan E, Guler MO, Tekinay AB. Glycosaminoglycan-Mimetic Signals Direct the Osteo/Chondrogenic Differentiation of Mesenchymal Stem Cells in a Three-Dimensional Peptide Nanofiber Extracellular Matrix Mimetic Environment. Biomacromolecules 2016; 17:1280-91. [PMID: 26840042 DOI: 10.1021/acs.biomac.5b01637] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent efforts in bioactive scaffold development focus strongly on the elucidation of complex cellular responses through the use of synthetic systems. Designing synthetic extracellular matrix (ECM) materials must be based on understanding of cellular behaviors upon interaction with natural and artificial scaffolds. Hence, due to their ability to mimic both the biochemical and mechanical properties of the native tissue environment, supramolecular assemblies of bioactive peptide nanostructures are especially promising for development of bioactive ECM-mimetic scaffolds. In this study, we used glycosaminoglycan (GAG) mimetic peptide nanofiber gel as a three-dimensional (3D) platform to investigate how cell lineage commitment is altered by external factors. We observed that amount of fetal bovine serum (FBS) presented in the cell media had synergistic effects on the ability of GAG-mimetic nanofiber gel to mediate the differentiation of mesenchymal stem cells into osteogenic and chondrogenic lineages. In particular, lower FBS concentration in the culture medium was observed to enhance osteogenic differentiation while higher amount FBS promotes chondrogenic differentiation in tandem with the effects of the GAG-mimetic 3D peptide nanofiber network, even in the absence of externally administered growth factors. We therefore demonstrate that mesenchymal stem cell differentiation can be specifically controlled by the combined influence of growth medium components and a 3D peptide nanofiber environment.
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Affiliation(s)
- Elif Arslan
- Institute of Materials Science and Nanotechnology, Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Mustafa O Guler
- Institute of Materials Science and Nanotechnology, Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
| | - Ayse B Tekinay
- Institute of Materials Science and Nanotechnology, Nanotechnology Research Center (UNAM), Bilkent University , Ankara 06800, Turkey
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50
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Topal AE, Tekinay AB, Guler MO, Dana A. Mechanical Properties of Differentiating Stem Cells on Peptide Nanofibers. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.3345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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