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Yaremenko AV, Pechnikova NA, Porpodis K, Damdoumis S, Aggeli A, Theodora P, Domvri K. Association of Fetal Lung Development Disorders with Adult Diseases: A Comprehensive Review. J Pers Med 2024; 14:368. [PMID: 38672994 PMCID: PMC11051200 DOI: 10.3390/jpm14040368] [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: 02/22/2024] [Revised: 03/24/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
Fetal lung development is a crucial and complex process that lays the groundwork for postnatal respiratory health. However, disruptions in this delicate developmental journey can lead to fetal lung development disorders, impacting neonatal outcomes and potentially influencing health outcomes well into adulthood. Recent research has shed light on the intriguing association between fetal lung development disorders and the development of adult diseases. Understanding these links can provide valuable insights into the developmental origins of health and disease, paving the way for targeted preventive measures and clinical interventions. This review article aims to comprehensively explore the association of fetal lung development disorders with adult diseases. We delve into the stages of fetal lung development, examining key factors influencing fetal lung maturation. Subsequently, we investigate specific fetal lung development disorders, such as respiratory distress syndrome (RDS), bronchopulmonary dysplasia (BPD), congenital diaphragmatic hernia (CDH), and other abnormalities. Furthermore, we explore the potential mechanisms underlying these associations, considering the role of epigenetic modifications, transgenerational effects, and intrauterine environmental factors. Additionally, we examine the epidemiological evidence and clinical findings linking fetal lung development disorders to adult respiratory diseases, including asthma, chronic obstructive pulmonary disease (COPD), and other respiratory ailments. This review provides valuable insights for healthcare professionals and researchers, guiding future investigations and shaping strategies for preventive interventions and long-term care.
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Affiliation(s)
- Alexey V. Yaremenko
- Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Oncology Unit, Pulmonary Department, George Papanikolaou Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (K.P.); (S.D.)
| | - Nadezhda A. Pechnikova
- Laboratory of Chemical Engineering A’, School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (N.A.P.); (A.A.)
- Saint Petersburg Pasteur Institute, Saint Petersburg 197101, Russia
| | - Konstantinos Porpodis
- Oncology Unit, Pulmonary Department, George Papanikolaou Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (K.P.); (S.D.)
| | - Savvas Damdoumis
- Oncology Unit, Pulmonary Department, George Papanikolaou Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (K.P.); (S.D.)
| | - Amalia Aggeli
- Laboratory of Chemical Engineering A’, School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (N.A.P.); (A.A.)
| | - Papamitsou Theodora
- Laboratory of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece;
| | - Kalliopi Domvri
- Oncology Unit, Pulmonary Department, George Papanikolaou Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (K.P.); (S.D.)
- Laboratory of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece;
- Pathology Department, George Papanikolaou Hospital, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece
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Pitou M, Papachristou E, Bratsios D, Kefala GM, Tsagkarakou AS, Leonidas DD, Aggeli A, Papadopoulos GE, Papi RM, Choli-Papadopoulou T. In Vitro Chondrogenesis Induction by Short Peptides of the Carboxy-Terminal Domain of Transforming Growth Factor β1. Biomedicines 2023; 11:3182. [PMID: 38137403 PMCID: PMC10740954 DOI: 10.3390/biomedicines11123182] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 12/24/2023] Open
Abstract
Τransforming growth factor β1 (TGF-β1) comprises a key regulator protein in many cellular processes, including in vivo chondrogenesis. The treatment of human dental pulp stem cells, separately, with Leu83-Ser112 (C-terminal domain of TGF-β1), as well as two very short peptides, namely, 90-YYVGRKPK-97 (peptide 8) and 91-YVGRKP-96 (peptide 6) remarkably enhanced the chondrogenic differentiation capacity in comparison to their full-length mature TGF-β1 counterpart either in monolayer cultures or 3D scaffolds. In 3D scaffolds, the reduction of the elastic modulus and viscous modulus verified the production of different amounts and types of ECM components. Molecular dynamics simulations suggested a mode of the peptides' binding to the receptor complex TβRII-ALK5 and provided a possible structural explanation for their role in inducing chondrogenesis, along with endogenous TGF-β1. Further experiments clearly verified the aforementioned hypothesis, indicating the signal transduction pathway and the involvement of TβRII-ALK5 receptor complex. Real-time PCR experiments and Western blot analysis showed that peptides favor the ERK1/2 and Smad2 pathways, leading to an articular, extracellular matrix formation, while TGF-β1 also favors the Smad1/5/8 pathway which leads to the expression of the metalloproteinases ADAMTS-5 and MMP13 and, therefore, to a hypertrophic chondrocyte phenotype. Taken together, the two short peptides, and, mainly, peptide 8, could be delivered with a scaffold to induce in vivo chondrogenesis in damaged articular cartilage, constituting, thus, an alternative therapeutic approach for osteoarthritis.
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Affiliation(s)
- Maria Pitou
- Laboratory of Biochemistry, School of Chemistry, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
| | - Eleni Papachristou
- Laboratory of Biochemistry, School of Chemistry, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
| | - Dimitrios Bratsios
- Laboratory of Biomedical Engineering, School of Chemical Engineering, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
| | - Georgia-Maria Kefala
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Anastasia S. Tsagkarakou
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Demetrios D. Leonidas
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Amalia Aggeli
- Laboratory of Biomedical Engineering, School of Chemical Engineering, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
| | - Georgios E. Papadopoulos
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500 Larissa, Greece
| | - Rigini M. Papi
- Laboratory of Biochemistry, School of Chemistry, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
| | - Theodora Choli-Papadopoulou
- Laboratory of Biochemistry, School of Chemistry, Aristotle University of Thessaloniki (AUTh), 54124 Thessaloniki, Greece
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Mantsou A, Papachristou E, Keramidas P, Lamprou P, Pitou M, Papi RM, Dimitriou K, Aggeli A, Choli-Papadopoulou T. Fabrication of a Smart Fibrous Biomaterial That Harbors an Active TGF-β1 Peptide: A Promising Approach for Cartilage Regeneration. Biomedicines 2023; 11:1890. [PMID: 37509529 PMCID: PMC10377373 DOI: 10.3390/biomedicines11071890] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023] Open
Abstract
The regeneration of articular cartilage remains a serious problem in various pathological conditions such as osteoarthritis, due to the tissue's low self-healing capacity. The latest therapeutic approaches focus on the construction of biomaterials that induce cartilage repair. This research describes the design, synthesis, and investigation of a safe, "smart", fibrous scaffold containing a genetically incorporated active peptide for chondrogenic induction. While possessing specific sequences and the respective mechanical properties from natural fibrous proteins, the fibers also incorporate a Transforming Growth Factor-β1 (TGF-β1)-derived peptide (YYVGRKPK) that can promote chondrogenesis. The scaffold formed stable porous networks with shear-thinning properties at 37 °C, as shown by SEM imaging and rheological characterization, and were proven to be non-toxic to human dental pulp stem cells (hDPSCs). Its chondrogenic capacity was evidenced by a strong increase in the expression of specific chondrogenesis gene markers SOX9, COL2, ACAN, TGFBR1A, and TGFBR2 in cells cultured on "scaffold-TGFβ1" for 21 days and by increased phosphorylation of intracellular signaling proteins Smad-2 and Erk-1/2. Additionally, intense staining of glycosaminoglycans was observed in these cells. According to our results, "scaffold-TGFβ1" is proposed for clinical studies as a safe, injectable treatment for cartilage degeneration.
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Affiliation(s)
- Aglaia Mantsou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Eleni Papachristou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Panagiotis Keramidas
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Paraskevas Lamprou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Maria Pitou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Rigini M Papi
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Katerina Dimitriou
- Laboratory of Chemical Engineering A', School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Amalia Aggeli
- Laboratory of Chemical Engineering A', School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Theodora Choli-Papadopoulou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
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Katrilaka C, Karipidou N, Petrou N, Manglaris C, Katrilakas G, Tzavellas AN, Pitou M, Tsiridis EE, Choli-Papadopoulou T, Aggeli A. Freeze-Drying Process for the Fabrication of Collagen-Based Sponges as Medical Devices in Biomedical Engineering. Materials (Basel) 2023; 16:4425. [PMID: 37374608 DOI: 10.3390/ma16124425] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
This paper presents a systematic review of a key sector of the much promising and rapidly evolving field of biomedical engineering, specifically on the fabrication of three-dimensional open, porous collagen-based medical devices, using the prominent freeze-drying process. Collagen and its derivatives are the most popular biopolymers in this field, as they constitute the main components of the extracellular matrix, and therefore exhibit desirable properties, such as biocompatibility and biodegradability, for in vivo applications. For this reason, freeze-dried collagen-based sponges with a wide variety of attributes can be produced and have already led to a wide range of successful commercial medical devices, chiefly for dental, orthopedic, hemostatic, and neuronal applications. However, collagen sponges display some vulnerabilities in other key properties, such as low mechanical strength and poor control of their internal architecture, and therefore many studies focus on the settlement of these defects, either by tampering with the steps of the freeze-drying process or by combining collagen with other additives. Furthermore, freeze drying is still considered a high-cost and time-consuming process that is often used in a non-optimized manner. By applying an interdisciplinary approach and combining advances in other technological fields, such as in statistical analysis, implementing the Design of Experiments, and Artificial Intelligence, the opportunity arises to further evolve this process in a sustainable and strategic manner, and optimize the resulting products as well as create new opportunities in this field.
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Affiliation(s)
- Chrysoula Katrilaka
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Niki Karipidou
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Nestor Petrou
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Chris Manglaris
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - George Katrilakas
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Anastasios Nektarios Tzavellas
- 3rd Department of Orthopedics, School of Medicine, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Maria Pitou
- School of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Eleftherios E Tsiridis
- 3rd Department of Orthopedics, School of Medicine, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | | | - Amalia Aggeli
- Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
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Tsirigka A, Theodosiou E, Patsios SI, Tsoureki A, Andreadelli A, Papa E, Aggeli A, Karabelas AJ, Makris AM. Novel evolved Yarrowia lipolytica strains for enhanced growth and lipid content under high concentrations of crude glycerol. Microb Cell Fact 2023; 22:62. [PMID: 37004109 PMCID: PMC10067222 DOI: 10.1186/s12934-023-02072-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/24/2023] [Indexed: 04/03/2023] Open
Abstract
BACKGROUND Yarrowia lipolytica is a well-studied oleaginous yeast known for its ability to accumulate and store intracellular lipids, while growing on diverse, non-conventional substrates. Amongst them, crude glycerol, a low-cost by-product of the biodiesel industry, appears to be an interesting option for scaling up a sustainable single-cell oil production process. Adaptive laboratory evolution (ALE) is a powerful tool to force metabolic adaptations endowing tolerance to stressful environmental conditions, generating superior phenotypes with industrial relevance. RESULTS Y. lipolytica MUCL 28849 underwent ALE in a synthetic medium with increasing concentration of pure or crude glycerol as a stressing factor (9-20% v/v) for 520 generations. In one case of pure glycerol, chemical mutagenesis with ethyl methanesulfonate (EMS) was applied prior to ALE. Growth profile, biomass production and lipid content of 660 evolved strains (EVS), revealed 5 superior isolates; exhibiting from 1.9 to 3.6-fold increase of dry biomass and from 1.1 to 1.6-fold increase of lipid concentration compared to the parental strain, when grown in 15% v/v crude glycerol. NGS for differential gene expression analysis, showed induced expression in all EVS affecting nucleosomal structure and regulation of transcription. As strains differentiated, further changes accumulated in membrane transport and protein transport processes. Genes involved in glycerol catabolism and triacylglycerol biosynthesis were overexpressed in two EVS. Mismatches and gaps in the expressed sequences identified altered splicing and mutations in the EVS, with most of them, affecting different components of septin ring formation in the budding process. The selected YLE155 EVS, used for scale-up cultivation in a 3L benchtop bioreactor with 20% v/v crude glycerol, achieved extended exponential phase, twofold increase of dry biomass and lipid yields at 48 h, while citric acid secretion and glycerol consumption rates were 40% and 50% lower, respectively, compared to the parental strain, after 24 h of cultivation. CONCLUSION ALE and EMS-ALE under increasing concentrations of pure or crude glycerol generated novel Y. lipolytica strains with enhanced biomass and lipid content. Differential gene expression analysis and scale-up of YLE155, illustrated the potential of the evolved strains to serve as suitable "chassis" for rational engineering approaches towards both increased lipid accumulation, and production of high-added value compounds, through efficient utilization of crude glycerol.
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Affiliation(s)
- Asimina Tsirigka
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eleni Theodosiou
- Institute of Applied Biosciences, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
| | - Sotiris I Patsios
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
| | - Antiopi Tsoureki
- Institute of Applied Biosciences, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
| | - Aggeliki Andreadelli
- Institute of Applied Biosciences, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
| | - Elisavet Papa
- Institute of Applied Biosciences, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
- Department of Computer Science and Biomedical Informatics, University of Thessaly, Lamia, Greece
| | - Amalia Aggeli
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Anastasios J Karabelas
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece
| | - Antonios M Makris
- Institute of Applied Biosciences, Centre for Research and Technology - Hellas, Thermi, Thessaloniki, Greece.
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Mantsou A, Papachristou E, Keramidas P, Lamprou P, Pavlidis A, Papi RM, Dimitriou K, Aggeli A, Choli-Papadopoulou T. A Novel Drastic Peptide Genetically Adapted to Biomimetic Scaffolds "Delivers" Osteogenic Signals to Human Mesenchymal Stem Cells. Nanomaterials (Basel) 2023; 13:1236. [PMID: 37049329 PMCID: PMC10096854 DOI: 10.3390/nano13071236] [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] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
This work describes the design, preparation, and deep investigation of "intelligent nanobiomaterials" that fulfill the safety rules and aim to serve as "signal deliverers" for osteogenesis, harboring a specific peptide that promotes and enhances osteogenesis at the end of their hydrogel fibers. The de novo synthesized protein fibers, besides their mechanical properties owed to their protein constituents from elastin, silk fibroin and mussel-foot adhesive protein-1 as well as to cell-attachment peptides from extracellular matrix glycoproteins, incorporate the Bone Morphogenetic Protein-2 (BMP2) peptide (AISMLYLDEN) that, according to our studies, serves as "signal deliverer" for osteogenesis. The osteogenetic capacity of the biomaterial has been evidenced by investigating the osteogenic marker genes ALP, RUNX2, Osteocalcin, COL1A1, BMPR1A, and BMPR2, which were increased drastically in cells cultured on scaffold-BMP2 for 21 days, even in the absence of osteogenesis medium. In addition, the induction of phosphorylation of intracellular Smad-1/5 and Erk-1/2 proteins clearly supported the osteogenetic capacity of the biomaterial.
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Affiliation(s)
- Aglaia Mantsou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Eleni Papachristou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Panagiotis Keramidas
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Paraskevas Lamprou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Alexandros Pavlidis
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Rigini M. Papi
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
| | - Katerina Dimitriou
- Laboratory of Chemical Engineering A’, School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (K.D.); (A.A.)
| | - Amalia Aggeli
- Laboratory of Chemical Engineering A’, School of Chemical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (K.D.); (A.A.)
| | - Theodora Choli-Papadopoulou
- Laboratory of Biochemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (A.M.); (E.P.); (P.K.); (P.L.); (A.P.); (R.M.P.)
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Kanakakis I, Stafylas P, Tsigkas G, Nikas D, Synetos A, Avramidis D, Tsiafoutis I, Dagre A, Tzikas S, Latsios G, Patsourakos N, Sanidas I, Skalidis E, Pipilis A, Bamidis P, Davlouros P, Kanakakis I, Tselegkidi M, Sertedaki E, Mamarelis I, Fraggos E, Mantzouranis E, Karvounis C, Manolis A, Chatzilymperis G, Chiotelis I, Gryllis D, Poulimenos L, Triantafyllis A, Alexopoulos D, Varlamos C, Almpanis G, Aggeli A, Sakkas A, Trikas A, Tsiamis S, Triantafylloy K, Mpenia D, Oikonomou D, Papadopoulou E, Avramidis D, Kousta M, Moulianitaki E, Poulianitis G, Mavrou G, Latsios G, Synetos A, Tousoulis D, Kafkas N, Godwin S, Mertzanos G, Koytouzis M, Tsiafoutis I, Papadopoulos A, Tsoumeleas A, Barbetseas I, Sanidas I, Athanasiou A, Paizis I, Kakkavas A, Papafanis T, Mantas I, Neroutsos G, Gkoliopoulou A, Tafrali V, Diakakis G, Grammatikopoulos K, Sinanis T, Kartalis A, Afendoulis D, Voutas P, Kardamis C, Doulis A, Kalantzis N, Vergis K, Chasikidis C, Armatas G, Damelou A, Ntogka M, Serafetinidis I, Zagkas K, Tselempis T, Makridis P, Karantoumanis I, Karapatsoudi E, Oikonomou K, Foukarakis E, Kafarakis P, Pitarokoilis M, Rogdakis E, Stavrakis S, Koudounis G, Karampetsos V, Lionakis N, Panotopoulos C, Svoronos D, Tsorlalis I, Tsatiris K, Beneki E, Papadopoulos N, Sawafta A, Kozatsani D, Spyromitros G, Bostanitis I, Dimitriadis G, Nikoloulis N, Kampouridis N, Giampatzis V, Patsilinakos S, Andrikou E, Katsiadas N, Papanagnou G, Kotsakis A, Ioannidis E, Platogiannis N, Psychari S, Pissimissis E, Gavrielatos G, Maritsa D, Papakonstantinou N, Patsourakos N, Oikonomou G, Katsanou K, Lazaris E, Moschos N, Giakoumakis T, Papagiannis N, Goudis C, Daios S, Devliotis K, Dimitriadis F, Giannadaki M, Savvidis M, Tsinopoulos G, Zarifis I, Askalidou T, Vasileiadis I, Kleitsiotou P, Sidiropoulos S, Tsaousidis A, Tzikas S, Vassilikos V, Papadopoulos C, Zarvalis Ε, Gogos C, Moschovidis V, Styliadis I, Laschos V, Spathoulas K, Vogiatzis I, Kasmeridis C, Papadopoulos A, Pittas S, Sdogkos E, Dagre A, Mpounas P, Rodis I, Pipilis A, Konstantinidis S, Makrygiannis S, Masdrakis A, Magginas A, Sevastos G, Katsimagklis G, Skalidis E, Petousis S, Davlouros P, Tsigkas G, Hahalis G, Koufou E, Tziakas D, Chalikias G, Thomaidi A, Stakos D, Chotidis A, Nikas D, Sakellariou X, Skoularigkis I, Dimos A, Iakovis N, Mpourazana A, Zagouras A, Lygkouri G, Bamidis P, Lagakis P, Spachos D, Stafylas P, Chalitsios C, Karaiskou M, Tychala C. Epidemiology, reperfusion management and outcomes of patients with myocardial infarction in Greece: The ILIAKTIS study. Hellenic J Cardiol 2022; 67:1-8. [DOI: 10.1016/j.hjc.2022.03.003] [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] [Received: 07/21/2021] [Revised: 01/20/2022] [Accepted: 03/08/2022] [Indexed: 11/26/2022] Open
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Tyrnenopoulou PC, Rizos ED, Kritsepi-Konstantinou M, Papadopoulou PL, Patsikas MN, Papazoglou LG, Aggeli A, Diakakis NE. Quantitative characterization of viscoelastic properties of synovial fluid from forelimb joints of orthopedically normal Thoroughbreds and warmblood horses. Am J Vet Res 2019; 80:342-346. [PMID: 30919681 DOI: 10.2460/ajvr.80.4.342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine whether differences existed in the viscoelastic properties of synovial fluid samples from the metacarpophalangeal, intercarpal, and distal interphalangeal joints of orthopedically normal athletic horses. ANIMALS 45 warmblood horses and 30 Thoroughbreds (age range, 4 to 16 years). PROCEDURES Synovial fluid samples were aseptically obtained via arthrocentesis from 1 metacarpophalangeal, intercarpal, and distal interphalangeal joint of each horse, and nucleated cell counts were performed. A commercial ELISA was used to measure sample hyaluronic acid concentrations, and full rheological characterization of samples was performed to measure the elastic or storage modulus G' and viscous or loss modulus G" at 37.5°C (representing the body temperature of horses). Findings were compared among joints and between breed groups by means of ANOVA. RESULTS Significant differences in synovial fluid G' and G" values were identified between Thoroughbreds and warmblood horses for the metacarpophalangeal joint, between the metacarpophalangeal and intercarpal joints of Thoroughbreds, and between the metacarpophalangeal and distal interphalangeal joints and intercarpal and distal interphalangeal joints of warmblood horses. No significant differences were identified between breed groups or among joints in synovial fluid hyaluronic concentrations or nucleated cell counts. CONCLUSIONS AND CLINICAL RELEVANCE Viscoelastic properties of the forelimb joints of orthopedically normal Thoroughbreds and warmblood horses differed within and between these 2 groups, mainly as a function of the evaluated joint. To the authors' knowledge, this was the first study of its kind, and additional research is warranted to better understand the viscoelastic properties of synovial fluid in horses to optimize their locomotive function.
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Brunton PA, Davies RPW, Burke JL, Smith A, Aggeli A, Brookes SJ, Kirkham J. Treatment of early caries lesions using biomimetic self-assembling peptides--a clinical safety trial. Br Dent J 2015; 215:E6. [PMID: 23969679 PMCID: PMC3813405 DOI: 10.1038/sj.bdj.2013.741] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2013] [Indexed: 11/09/2022]
Abstract
OBJECTIVE We previously reported that a rationally designed biomimetic self-assembling peptide, P₁₁-4, nucleated hydroxyapatite de novo and was apparently capable of in situ enamel regeneration following infiltration into caries-like lesions. Our present aim was to determine the safety and potential clinical efficacy of a single application of P₁₁-4 on early enamel lesions. MATERIALS AND METHODS Fifteen healthy adults with Class V 'white spot' lesions received a single application of P₁₁-4. Adverse events and lesion appearances were recorded over 180 days. RESULTS Patients treated with P₁₁-4 experienced a total of 11 adverse events during the study, of which two were possibly related to the protocol. Efficacy evaluation suggested that treatment with P₁₁-4 significantly decreased lesion size (p = 0.02) after 30 days and shifted the apparent progression of the lesions from 'arrested/progressing' to 'remineralising' (p <0.001). A highly significant improvement in the global impression of change was recorded at day 30 compared with baseline (p <0.001). CONCLUSIONS The results suggest that treatment of early caries lesions with P₁₁-4 is safe, and that a single application is associated with significant enamel regeneration, presumably by promoting mineral deposition within the subsurface tissue.
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Affiliation(s)
- P A Brunton
- Restorative Dentistry, Leeds Dental Institute, University of Leeds, Clarendon Way, Leeds, LS2 9LU, UK
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Abstract
Tissue engineered therapies are emerging as solutions to several of the medical challenges facing aging societies. To this end, a fundamental research goal is the development of novel biocompatible materials and scaffolds. Self-assembling peptides are materials that have undergone rapid development in the last two decades and they hold promise in meeting some of these challenges. Using amino acids as building blocks enables a great versatility to be incorporated into the structures that peptides form, their physical properties and their interactions with biological systems. This review discusses several classes of short self-assembling sequences, explaining the principles that drive their self-assembly into structures with nanoscale ordering, and highlighting in vitro and in vivo studies that demonstrate the potential of these materials as novel soft tissue engineering scaffolds.
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Affiliation(s)
- Steven Maude
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Eileen Ingham
- The Institute of Medical & Biological Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Amalia Aggeli
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK.
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Kyle S, Felton SH, McPherson MJ, Aggeli A, Ingham E. Peptide-Based Biomaterials: Rational Molecular Design of Complementary Self-Assembling Peptide Hydrogels (Adv. Healthcare Mater. 5/2012). Adv Healthc Mater 2012. [DOI: 10.1002/adhm.201290024] [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: 11/10/2022]
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Affiliation(s)
- Stuart Kyle
- Institute of Medical & Biological Engineering, Institute of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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Wang M, Yan G, Yue W, Siu C, Tse H, Perperidis A, Cusack D, White A, Macgillivray T, Mcdicken W, Anderson T, Ryabov V, Shurupov V, Suslova T, Markov V, Elmstedt N, Ferm Widlund K, Lind B, Brodin LA, Westgren M, Mantovani F, Barbieri A, Bursi F, Valenti C, Quaglia M, Modena M, Peluso D, Muraru D, Dal Bianco L, Beraldo M, Solda' E, Tuveri M, Cucchini U, Al Mamary A, Badano L, Iliceto S, Goncalves A, Almeria C, Marcos-Alberca P, Feltes G, Hernandez-Antolin R, Rodriguez H, Maroto L, Silva Cardoso J, Macaya C, Zamorano J, Squarciotta S, Innocenti F, Guzzo A, Bianchi S, Lazzeretti D, De Villa E, Vicidomini S, Del Taglia B, Donnini C, Pini R, Mennie C, Salmasi AM, Kutyifa V, Nagy V, Edes E, Apor A, Merkely B, Nyrnes S, Lovstakken L, Torp H, Haugen B, Said K, Shehata A, Ashour Z, El-Tobgy S, Cameli M, Bigio E, Lisi M, Righini F, Franchi F, Scolletta S, Mondillo S, Gayat E, Weinert L, Yodwut C, Mor-Avi V, Lang R, Hrynchyshyn N, Kachenoura N, Diebold B, Khedim R, Senesi M, Redheuil A, Mousseaux E, Perdrix L, Yurdakul S, Erdemir V, Tayyareci Y, Memic K, Yildirimturk O, Aytekin V, Gurel M, Aytekin S, Gargani L, Fernandez Cimadevilla C, La Falce S, Landi P, Picano E, Sicari R, Smedsrud MK, Gravning J, Eek C, Morkrid L, Skulstad H, Aaberge L, Bendz B, Kjekshus J, Edvardsen T, Bajraktari G, Hyseni V, Morina B, Batalli A, Tafarshiku R, Olloni R, Henein M, Mjolstad O, Snare S, Folkvord L, Helland F, Torp H, Haraldseth O, Grimsmo A, Haugen B, Berry M, Zaghden O, Nahum J, Macron L, Lairez O, Damy T, Bensaid A, Dubois Rande J, Gueret P, Lim P, Nciri N, Issaoui Z, Tlili C, Wanes I, Foudhil H, Dachraoui F, Grapsa J, Dawson D, Nihoyannopoulos P, Gianturco L, Turiel M, Atzeni F, Sarzi-Puttini P, Stella D, Donato L, Tomasoni L, Jung P, Mueller M, Huber T, Sevilmis G, Kroetz F, Sohn H, Panoulas V, Bratsas A, Dawson D, Nihoyannopoulos P, Raso R, Tartarisco G, Gargani L, La Falce S, Pioggia G, Picano E, Gargiulo P, Petretta M, Cuocolo A, Prastaro M, D'amore C, Vassallo E, Savarese G, Marciano C, Paolillo S, Perrone Filardi P, Aggeli C, Felekos I, Roussakis G, Poulidakis E, Pietri P, Toutouzas K, Stefanadis C, Kaladaridis A, Skaltsiotis I, Kottis G, Bramos D, Takos D, Matthaios I, Agrios I, Papadopoulou E, Moulopoulos S, Toumanidis S, Carrilho-Ferreira P, Cortez-Dias N, Jorge C, Silva D, Silva Marques J, Placido R, Santos L, Ribeiro S, Fiuza M, Pinto F, Stoickov V, Ilic S, Deljanin Ilic M, Kim W, Woo J, Bae J, Kim K, Descalzo M, Rodriguez J, Moral S, Otaegui I, Mahia P, Garcia Del Blanco L, Gonzalez Alujas T, Figueras J, Evangelista A, Garcia-Dorado D, Takeuchi M, Kaku K, Otani K, Iwataki M, Kuwaki H, Haruki N, Yoshitani H, Otsuji Y, Kukucka M, Pasic M, Unbehaun A, Dreysse S, Mladenow A, Kuppe H, Hetzer R, Rajamannan N, Yurdakul S, Tayyareci Y, Tanrikulu A, Yildirimturk O, Aytekin V, Aytekin S, Kristiansson L, Gustafsson S, Lindmark K, Henein MY, Evdoridis C, Stougiannos P, Thomopoulos M, Fosteris M, Spanos P, Sionis G, Giatsios D, Paschalis A, Sakellaris C, Trikas A, Yong ZY, Boerlage-Van Dijk K, Koch K, Vis M, Bouma B, Piek J, Baan J, Abid L, Frikha Z, Makni K, Maazoun N, Abid D, Hentati M, Kammoun S, Barbier P, Staron A, Cefalu' C, Berna G, Gripari P, Andreini D, Pontone G, Pepi M, Ring L, Rana B, Ho S, Wells F, Yurdakul S, Tayyareci Y, Yildirimturk O, Dogan A, Aytekin V, Aytekin S, Karaca O, Guler G, Guler E, Gunes H, Alizade E, Agus H, Gol G, Esen O, Esen A, Turkmen M, Agricola E, Ingallina G, Ancona M, Maggio S, Slavich M, Tufaro V, Oppizzi M, Margonato A, Orsborne C, Irwin B, Pearce K, Ray S, Garcia Alonso C, Vallejo N, Labata C, Lopez Ayerbe J, Teis A, Ferrer E, Nunez Aragon R, Gual F, Pedro Botet M, Bayes Genis A, Santos CM, Carvalho M, Andrade M, Dores H, Madeira S, Cardoso G, Ventosa A, Aguiar C, Ribeiras R, Mendes M, Petrovic M, Petrovic M, Milasinovic G, Vujisic-Tesic B, Nedeljkovic I, Zamaklar-Trifunovic D, Petrovic I, Draganic G, Banovic M, Boricic M, Villarraga H, Molini-Griggs Bs C, Silen-Rivera Bs P, Payne Mph Ms B, Koshino Md Phd Y, Hsiao Md J, Monivas Palomero V, Mingo Santos S, Mitroi C, Garcia Lunar I, Garcia Pavia P, Castro Urda V, Toquero J, Gonzalez Mirelis J, Cavero Gibanel M, Fernandez Lozano I, Oko-Sarnowska Z, Wachowiak-Baszynska H, Katarzynska-Szymanska A, Trojnarska O, Grajek S, Bellavia D, Pellikka P, Dispenzieri A, Oh JK, Polizzi V, Pitrolo F, Musumeci F, Miller F, Ancona R, Comenale Pinto S, Caso P, Severino S, Cavallaro C, Vecchione F, D'onofrio A, Calabro' R, Maceira Gonzalez AM, Ripoll C, Cosin-Sales J, Igual B, Salazar J, Belloch V, Cosin-Aguilar J, Pinamonti B, Iorio A, Bobbo M, Merlo M, Barbati G, Massa L, Faganello G, Di Lenarda A, Sinagra GF, Ishizu T, Seo Y, Enomoto M, Kameda Y, Ishibashi N, Inoue M, Aonuma K, Saleh A, Matsumori A, Negm H, Fouad H, Onsy A, Hamodraka E, Paraskevaidis I, Kallistratos M, Lezos V, Zamfir T, Manetos C, Mavropoulos D, Poulimenos L, Kremastinos D, Manolis A, Citro R, Rigo F, Ciampi Q, Patella M, Provenza G, Zito C, Tagliamonte E, Rotondi F, Silvestri F, Bossone E, Monivas Palomero V, Mingo Santos S, Beltran Correas P, Gutierrez Landaluce C, Mitroi C, Garcia Lunar I, Gonzalez Mirelis J, Cavero Gibanel M, Gomez Bueno M, Segovia Cubero J, Beladan C, Matei F, Popescu B, Calin A, Rosca M, Boanta A, Enache R, Savu O, Usurelu C, Ginghina C, Ciobanu AO, Dulgheru R, Magda S, Dragoi R, Florescu M, Vinereanu D, Silva Marques J, Robalo Martins S, Jorge C, Calisto C, Goncalves S, Ribeiro S, Barrigoto I, Carvalho De Sousa J, Almeida A, Nunes Diogo A, Sargento L, Satendra M, Sousa C, Lousada N, Palma Reis R, Schiano Lomoriello V, Esposito R, Santoro A, Raia R, Schiattarella P, Dores E, Galderisi M, Mansencal N, Caille V, Dupland A, Perrot S, Bouferrache K, Vieillard-Baron A, Jouffroy R, Moceri P, Liodakis E, Gatzoulis M, Li W, Dimopoulos K, Sadron M, Seguela PE, Arnaudis B, Dulac Y, Cognet T, Acar P, Shiina Y, Gatzoulis M, Uemura H, Li W, Kupczynska K, Kasprzak J, Michalski B, Lipiec P, Carvalho V, Almeida AMG, David C, Marques J, Silva D, Cortez-Dias N, Ferreira P, Amaro M, Costa P, Diogo A, Tritakis V, Ikonomidis I, Paraskevaidis I, Lekakis J, Tzortzis S, Kadoglou N, Papadakis I, Trivilou P, Koukoulis C, Anastasiou-Nana M, Bombardini T, Picano E, Gherardi S, Arpesella G, Maccherini M, Serra W, Magnani G, Del Bene R, Pasanisi E, Sicari R, Startari U, Panchetti L, Rossi A, Piacenti M, Morales M, Mansencal N, El Hajjaji I, El Mahmoud R, Digne F, Dubourg O, Gargani L, Agoston G, Moreo A, Pratali L, Moggi Pignone A, Pavellini A, Doveri M, Musca F, Varga A, Picano E, Pratali L, Faita F, Rimoldi S, Sartori C, Alleman Y, Salinas Salmon C, Villena M, Scherrer U, Picano E, Sicari R, Baptista R, Serra S, Castro G, Martins R, Salvador M, Monteiro P, Silva J, Szudi L, Temesvary A, Fekete B, Kassai I, Szekely L, Abdel Moneim SS, Martinez M, Mankad S, Bernier M, Dhoble A, Pellikka P, Chandrasekaran K, Oh J, Mulvagh S, Hong GR, Kim JY, Lee SC, Choi SH, Sohn IS, Seo HS, Choi JH, Cho KI, Yoon SJ, Lim SJ, Lipiec P, Wejner-Mik P, Kusmierek J, Plachcinska A, Szuminski R, Kasprzak J, Stoebe S, Tarr A, Trache T, Hagendorff A, Mor-Avi V, Yodwut C, Jenkins C, Kuhl H, Nesser H, Marwick T, Franke A, Niel J, Sugeng L, Lang R, Gustafsson S, Henein M, Soderberg S, Lindmark K, Lindqvist P, Necas J, Kovalova S, Saha SK, Kiotsekoglou A, Toole R, Govind S, Gopal A, Amzulescu MS, Florian A, Bogaert J, Janssens S, Voigt J, Parisi V, Losi M, Parrella L, Contaldi C, Chiacchio E, Caputi A, Scatteia A, Buonauro A, Betocchi S, Rimbas R, Dulgheru R, Mihaila S, Vinereanu D, Caputo M, Navarri R, Innelli P, Urselli R, Capati E, Ballo P, Furiozzi F, Favilli R, Mondillo S, Lindquist R, Miller A, Reece C, O'leary P, Cetta F, Eidem BW, Cikes M, Gasparovic H, Bijnens B, Velagic V, Kopjar T, Biocina B, Milicic D, Ta-Shma A, Nir A, Perles Z, Gavri S, Golender J, Rein A, Pinnacchio G, Barone L, Battipaglia I, Cosenza A, Marinaccio L, Coviello I, Scalone G, Sestito A, Lanza G, Crea F, Cakal S, Eroglu E, Ozkan B, Kulahcioglu S, Bulut M, Koyuncu A, Acar G, Alici G, Dundar C, Esen A, Labombarda F, Zangl E, Pellissier A, Bougle D, Maragnes P, Milliez P, Saloux E, Aggeli C, Lagoudakou S, Felekos I, Gialafos E, Poulidakis E, Tsokanis A, Roussakis G, Stefanadis C, Nagy A, Kovats T, Apor A, Vago H, Toth A, Sax B, Kovacs A, Merkely B, Elnoamany MF, Badran H, Abdelfattah I, Khalil T, Salama M, Butz T, Taubenberger C, Thangarajah F, Meissner A, Van Bracht M, Prull M, Yeni H, Plehn G, Trappe H, Rydman R, Bone D, Alam M, Caidahl K, Larsen F, Staron A, Gasior Z, Tabor Z, Sengupta P, Liu D, Niemann M, Hu K, Herrmann S, Stoerk S, Morbach C, Knop S, Voelker W, Ertl G, Weidemann F, Cawley P, Hamilton-Craig C, Mitsumori L, Maki J, Otto C, Astrom Aneq M, Nylander E, Ebbers T, Engvall J, Arvanitis P, Flachskampf F, Duvernoy O, De Torres Alba F, Valbuena Lopez S, Guzman Martinez G, Gomez De Diego J, Rey Blas J, Armada Romero E, Lopez De Sa E, Moreno Yanguela M, Lopez Sendon J, Aggeli C, Felekos I, Poulidakis E, Trikalinos N, Siasos G, Aggeli A, Roussakis G, Stefanadis C, Tomaszewski A, Kutarski A, Tomaszewski M, Ikonomidis I, Lekakis J, Tritakis V, Tzortzis S, Kadoglou N, Papadakis I, Trivilou P, Anastasiou-Nana M, Koukoulis C, Paraskevaidis I, Vriz O, Driussi C, Bettio M, Pavan D, Bossone E, Antonini Canterin F, Doltra Magarolas A, Fernandez-Armenta J, Silva E, Solanes N, Rigol M, Barcelo A, Mont L, Berruezo A, Brugada J, Sitges M, Ciciarello FL, Mandolesi S, Fedele F, Agati L, Marceca A, Rhee S, Shin S, Kim S, Yun K, Yoo N, Kim N, Oh S, Jeong J, Alabdulkarim N. Poster Session 4: Friday 9 December 2011, 14:00-18:00 * Location: Poster Area. European Journal of Echocardiography 2011. [DOI: 10.1093/ejechocard/jer216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Kyle S, McPherson MJ, Aggeli A, Ingham E. WITHDRAWN: The effect of molecular design on the physical and biological properties of complementary self-assembling peptides. Biomaterials 2011:S0142-9612(11)00653-3. [PMID: 21723600 DOI: 10.1016/j.biomaterials.2011.05.082] [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] [Received: 05/09/2011] [Accepted: 05/27/2011] [Indexed: 11/16/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Stuart Kyle
- Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK; Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK; Centre for Molecular Nanoscience, School of Chemistry, Faculty of Mathematics & Physical Sciences, University of Leeds, Leeds LS2 9JT, UK; Institute of Medical & Biological Engineering, University of Leeds, Leeds LS2 9JT, UK
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Davies RPW, Aggeli A. Self-assembly of amphiphilic β-sheet peptide tapes based on aliphatic side chains. J Pept Sci 2010; 17:107-14. [DOI: 10.1002/psc.1335] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 10/28/2010] [Accepted: 11/01/2010] [Indexed: 01/10/2023]
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Abstract
Synthetic nanostructures based on self-assembling systems that aim to mimic natural extracellular matrix are now being used as substrates in tissue engineering applications. Peptides are excellent starting materials for the self-assembly process as they can be readily synthesised both chemically and biologically. P₁₁-4 is an 11 amino acid peptide that undergoes triggered self-assembly to form a self-supporting hydrogel. It exists as unimers of random coil conformations in water above pH 7.5 but at low pH adopts an antiparallel β-sheet conformation. It also self-assembles under physiological conditions in a concentration-dependent manner. Here we describe an unimer P₁₁-4 production system and the use of a simple site-directed mutagenesis approach to generate a series of other P₁₁-family peptide expression vectors. We have developed an efficient purification strategy for these peptide biomaterials using a simple procedure involving chemical cleavage with cyanogen bromide then repeated filtration, lyophilisation and wash steps. We report peptide-fusion protein yields of ca. 4.64 g/L and we believe the highest reported recovery of a recombinant self-assembling peptide at 203 mg/L of pure recombinant P₁₁-4. This peptide forms a self-supporting hydrogel under physiological conditions with essentially identical physico-chemical properties to the chemically synthesised peptide. Critically it also displays excellent cytocompatibility when tested with primary human dermal fibroblasts. This study demonstrates that high levels of a series of recombinant self-assembling peptides can be purified using a simple process for applications as scaffolds in tissue engineering.
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Affiliation(s)
- Stuart Kyle
- Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
- Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
- Centre for Molecular Nanoscience, School of Chemistry, University of Leeds, LS2 9JT, UK
- Institute of Medical and Biological Engineering, University of Leeds, LS2 9JT, UK
| | - Amalia Aggeli
- Centre for Molecular Nanoscience, School of Chemistry, University of Leeds, LS2 9JT, UK
| | - Eileen Ingham
- Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
- Institute of Medical and Biological Engineering, University of Leeds, LS2 9JT, UK
| | - Michael J. McPherson
- Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
- Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
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Protopapa E, Ringstad L, Aggeli A, Nelson A. Interaction of self-assembling β-sheet peptides with phospholipid monolayers: The effect of serine, threonine, glutamine and asparagine amino acid side chains. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.01.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kyle S, Aggeli A, Ingham E, McPherson MJ. Production of self-assembling biomaterials for tissue engineering. Trends Biotechnol 2009; 27:423-33. [PMID: 19497631 PMCID: PMC2828541 DOI: 10.1016/j.tibtech.2009.04.002] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 04/01/2009] [Accepted: 04/01/2009] [Indexed: 11/24/2022]
Abstract
Self-assembling peptide-based biomaterials are being developed for use as 3D tissue engineering scaffolds and for therapeutic drug-release applications. Chemical synthesis provides custom-made peptides in small quantities, but production approaches based upon transgenic organisms might be more cost-effective for large-scale peptide production. Long lead times for developing appropriate animal clones or plant lines and potential negative public opinion are obstacles to these routes. Microbes, particularly safe organisms used in the food industry, offer a more rapid route to the large-scale production of recombinant self-assembling biomaterials. In this review, recent advances and challenges in the recombinant production of collagen, elastin and de novo designed self-assembling peptides are discussed.
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Affiliation(s)
- Stuart Kyle
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.
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Riley JM, Aggeli A, Koopmans RJ, McPherson MJ. Bioproduction and characterization of a pH responsive self-assembling peptide. Biotechnol Bioeng 2009; 103:241-51. [PMID: 19266471 DOI: 10.1002/bit.22274] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Peptide P(11)-4 (QQRFEWEFEQQ) was designed to self-assemble to form beta-sheets and nematic gels in the pH range 5-7 at concentrations > or =12.6 mM in water. This self-assembly is reversibly controlled by adjusting the pH of the solvent. It can also self-assemble into gels in biological media. This together with its biocompatibility and biodegradability make P(11)-4 an attractive building block for the fabrication of nanoscale materials with uses in, for example, tissue engineering. A limitation to large-scale production of such peptides is the high cost of solid phase chemical synthesis. We describe expression of peptide P(11)-4 in the bacterium Escherichia coli from constructs carrying tandem repeats of the peptide coding sequence. The vector pET31b+ was used to express P(11)-4 repeats fused to the ketosteroid isomerase protein which accumulates in easily recoverable inclusion bodies. Importantly, the use of auto-induction growth medium to enhance cell density and protein expression levels resulted in recovery of 2.5 g fusion protein/L culture in both shake flask and batch fermentation. Whole cell detergent lysis allowed recovery of inclusion bodies largely composed of the fusion protein. Cyanogen bromide cleavage followed by reverse phase HPLC allowed purification of the recombinant peptide with a C-terminal homoserine lactone (rP(11)-4(hsl)). This recombinant peptide formed pH dependent hydrogels, displayed beta-structure measured by circular dichroism and fibril formation observed by transmission electron microscopy.
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Affiliation(s)
- Jessica M Riley
- Astbury Centre for Structural Molecular Biology, Institute of Molecular and Cellular Biology, School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
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Protopapa E, Maude S, Aggeli A, Nelson A. Interaction of self-assembling beta-sheet peptides with phospholipid monolayers: the role of aggregation state, polarity, charge and applied field. Langmuir 2009; 25:3289-96. [PMID: 19437790 DOI: 10.1021/la803368r] [Citation(s) in RCA: 17] [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: 05/21/2023]
Abstract
Studies of beta-sheet peptide/phospholipid interactions are important for an understanding of the folding of beta-sheet-rich membrane proteins and the action of antimicrobial and toxic peptides. Further, self-assembling peptides have numerous applications in medicine and therefore an insight is required into the relation between peptide molecular structure and biomembrane activity. We previously developed one of the simplest known model peptide systems which, above a critical concentration (c*) in solution, undergoes nucleated one-dimensional self-assembly from a monomeric random coil into a hierarchy of well defined beta-sheet structures. Here we examine the effects of peptide aggregation, polarity, charge, and applied field on peptide interactions with dioleoyl phosphatidylcholine (DOPC) monolayers using electrochemical techniques. The interactions of six systematically altered 11 residue beta-sheet tape-forming peptides were investigated. The following findings with respect to 11 residue beta-sheet peptide-DOPC interaction arose from the study: (i) The solution monomer peptide species is the monolayer active moeity. (ii) Amphiphilic peptides are more monolayer active than polar peptides in the absence of applied electric field. (iii) Positive charge on amphiphilic peptides facilitates monolayer interaction in the absence of applied electric field. (iv) Negative applied electric field facilitates monolayer interaction with positively charged amphiphilic and polar peptides. (v) Neutral amphiphilic peptides permeabilize DOPC layers to ions to the greatest extent. (vi) The beta-sheet tape forming peptides are shown to be significantly less monolayer disruptive than antimicrobial peptides. These conclusions will greatly contribute to the rational design of new peptide-based biomaterials and biosensors.
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Affiliation(s)
- Elisabeth Protopapa
- Centre for Self-Organising Molecular Systems (SOMS), School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
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Tsopelas C, Kapsali F, Tsetsou S, Aggeli A, Kardaras K. 5-HT and Aggression: New Data. Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)71320-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Aims:Growing evidence points to the conclusion that biological factors do predispose some individuals towards violent behavior. Contemporary research suggests that serotonin is a neurotransmitter associated with expressed aggression, challenging the concept of a person's knowledge of right or wrong and the free will to choose between the two.Methods:Thorough research of the main databases (Medline, Embase, Psychinfo), and web search engines such as Goggle, Lycos for relevant studies, agencies and organizations, interested in neurotransmitter, serotonin (5-HT), aggression, hostility, violence and violent behaviour issues.Results:The neurotransmitter serotonin (5-HT) has been implicated in the modulation of aggression in animals and humans. the 5-HT system seems to be involved in either the performance or the termination of aggressive behaviours. So although an association with serotonin and aggression appears to be present, it isn't clear the way of this association or the expression of the interplay of the genes with the individuals’ environment. Genes and environment appears to be in a dynamic interplay that concludes in the observed behaviour.Conclusions:A longstanding dogma that aggression and serotonergic activity are inversely related has to be abandoned in light of many new findings. Trait and state aggression are differentially regulated by the 5-HT system and different 5-HT receptors seem to be involved. We are still far from understanding the complex role played by the serotonergic system in the modulation of a complex set of behaviors like aggression.
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Knapman TW, Aggeli A, Ashcroft AE. Critical concentrations of beta-sheet peptide self-assembly quantified directly by nanoelectrospray ionization mass spectrometry. Rapid Commun Mass Spectrom 2008; 22:1611-1614. [PMID: 18433088 DOI: 10.1002/rcm.3540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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Carrick LM, Aggeli A, Boden N, Fisher J, Ingham E, Waigh TA. Effect of ionic strength on the self-assembly, morphology and gelation of pH responsive β-sheet tape-forming peptides. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.05.036] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kirkham J, Firth A, Vernals D, Boden N, Robinson C, Shore RC, Brookes SJ, Aggeli A. Self-assembling peptide scaffolds promote enamel remineralization. J Dent Res 2007; 86:426-30. [PMID: 17452562 DOI: 10.1177/154405910708600507] [Citation(s) in RCA: 201] [Impact Index Per Article: 11.8] [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: 11/16/2022] Open
Abstract
Rationally designed beta-sheet-forming peptides that spontaneously form three-dimensional fibrillar scaffolds in response to specific environmental triggers may potentially be used in skeletal tissue engineering, including the treatment/prevention of dental caries, via bioactive surface groups. We hypothesized that infiltration of caries lesions with monomeric low-viscosity peptide solutions would be followed by in situ polymerization triggered by conditions of pH and ionic strength, providing a biomimetic scaffold capable of hydroxyapatite nucleation, promoting repair. Our aim was to determine the effect of an anionic peptide applied to caries-like lesions in human dental enamel under simulated intra-oral conditions of pH cycling. Peptide treatment significantly increased net mineral gain by the lesions, due to both increased remineralization and inhibition of demineralization over a five-day period. The assembled peptide was also capable of inducing hydroxyapatite nucleation de novo. The results suggest that self-assembling peptides may be useful in the modulation of mineral behavior during in situ dental tissue engineering.
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Affiliation(s)
- J Kirkham
- Department of Oral Biology, Leeds Dental Institute, University of Leeds, Clarendon Way, Leeds LS2 9LU, UK
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Protopapa E, Aggeli A, Boden N, Knowles PF, Salay LC, Nelson A. Electrochemical screening of self-assembling β-sheet peptides using supported phospholipid monolayers. Med Eng Phys 2006; 28:944-55. [PMID: 16807052 DOI: 10.1016/j.medengphy.2006.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Accepted: 05/04/2006] [Indexed: 10/24/2022]
Abstract
In the context of the medical applications of beta-sheet self-assembling peptides, it is important to be able to predict their activity at the biological membrane level. A study of the interaction of four systematically varied 11-residue (P11-1, P11-2, P11-6 and P11-7) and one 13-residue (P13-1) designed beta-sheet self-assembling peptides with DOPC monolayers on a mercury electrode is reported in this paper. Experiments were carried out in 0.1 mol dm(-3) KCl electrolyte with added phosphate buffer (0.001 mol dm(-3)) at pH approximately 7.6. The capacity-potential curves of the coated electrode in the presence and absence of the different peptides were measured using out-of-phase ac voltammetry. The frequency dependence of the complex impedance of the coated electrode surfaces in the presence and absence of the peptides was estimated between 65,000 and 0.1 Hz at -0.4V versus Ag/AgCl 3.5 mol(-3) dm(-3) KCl. The monolayer permeabilising properties of the peptides were studied by following the reduction of Tl(I) to Tl(Hg) at the coated electrode. Of the five peptides studied, P11-2, P11-7 and P13-1 interact most strongly with the DOPC layer. P11-1 which has a polar primary structure shows no obvious interaction with the phospholipid but surprisingly, it permeabilises the phospholipid layer to Tl(+).
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Affiliation(s)
- E Protopapa
- Center for Self Organising Molecular Systems, School of Chemistry, University of Leeds, LS2 9JT, UK
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27
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Affiliation(s)
- R.P.W. Davies
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - A. Aggeli
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - A.J. Beevers
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - N. Boden
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - L.M. Carrick
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - C.W.G. Fishwick
- a The University of Leeds, Centre for Self-Organising Molecular Systems, Department of Chemistry , Leeds, LS2 9JT, UK
| | - T.C.B. Mcleish
- b The University of Leeds, Department of Physics , Leeds, LS2 9JT, UK
| | - I. Nyrkova
- b The University of Leeds, Department of Physics , Leeds, LS2 9JT, UK
| | - A.N. Semenov
- b The University of Leeds, Department of Physics , Leeds, LS2 9JT, UK
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Abstract
The production of bone-, dentine- and enamel-like biomaterials for the engineering of mineralized (hard) tissues is a high-priority in regenerative medicine and dentistry. An emerging treatment approach involves the use of short biomimetic peptides that self-assemble to form micrometer-long nanofibrils with well defined surface chemistry and periodicity that display specific arrays of functional groups capable of mineral nucleation. The fibrils also give rise to dynamically stable 3D scaffold gels for the potential control of crystal disposition and growth. Peptides can also be injected in their monomeric fluid state, with subsequent self-assembly and gelation in situ triggered by physiological conditions. In this way, they can infiltrate and self-assemble within irregular or microscopic cavities, for restorative treatment of bone defects, dentinal hypersensitivity or dental decay. Cell adhesion and proliferation is also supported by these scaffolds, offering further advantages for applications in hard tissue engineering. These self-assembling matrices also provide well defined model systems that can contribute greatly to the elucidation of the biological mechanisms of protein-mediated biomineralization.
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Affiliation(s)
- Ashley Firth
- Centre for Self-Organising Molecular Systems (SOMS Centre), Dept of Chemistry, Faculty of Mathematics & Physical Sciences, Leeds, UK
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29
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Bell CJ, Carrick LM, Katta J, Jin Z, Ingham E, Aggeli A, Boden N, Waigh TA, Fisher J. Self-assembling peptides as injectable lubricants for osteoarthritis. J Biomed Mater Res A 2006; 78:236-46. [PMID: 16628707 DOI: 10.1002/jbm.a.30672] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [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: 11/11/2022]
Abstract
The self-assembly of peptides is explored as an alternative route towards the development of new injectable joint lubricants for osteoarthritis (OA). The versatility of the peptide chemistry allows the incorporation of behavior reminiscent of hyaluronic acid (HA), while the triggered in situ self-assembly provides easy delivery of the samples by injection due to the low viscosity of the peptide solutions (that are initially monomeric). Using design criteria based on the chemical properties of HA, a range of de novo peptides were prepared with systematic alterations of charge and hydrophilicity that self-assembled into nematic fluids and gels in physiological solution conditions. The frictional characteristics of the peptides were evaluated using cartilage on cartilage sliding contacts along with their rheological characteristics. Peptide P(11)-9, whose molecular, mesoscopic, and rheological properties most closely resembled HA was found to be the most effective lubricant amongst the peptides. In healthy static and dynamic friction testing (corresponding to healthy joints) P(11)-9 at 20-40 mg/mL performed similar to HA at 10 mg/mL. In friction tests with damaged cartilage (corresponding to early stage OA) P(11)-9 was a less efficient lubricant than HA, but still the best among all the peptides tested. The results indicate that de novo self-assembling peptides could be developed as an alternate therapeutic lubricant for early stage OA.
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Affiliation(s)
- Carol J Bell
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, West Yorkshire, LS2 9JT, United Kingdom
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30
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Carrick L, Tassieri M, Waigh TA, Aggeli A, Boden N, Bell C, Fisher J, Ingham E, Evans RML. The internal dynamic modes of charged self-assembled peptide fibrils. Langmuir 2005; 21:3733-3737. [PMID: 15835929 DOI: 10.1021/la046802f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Photon correlation spectroscopy is used to study the internal dynamics of self-assembled charged peptide fibrils. Short neutral and charged polymeric aggregates have diffusive modes due to whole macromolecular motion. For long semiflexible fibrils the logarithm of the intermediate scattering function follows a q(2)t(3/4) scaling at long times consistent with a Kratky-Porod free energy and preaveraged Oseen hydrodynamics. Persistence lengths on the order of micrometers are calculated for the peptide fibrils consistent with estimates from the liquid-crystalline phase behavior. Fibril diameters (5-35 nm) calculated from the initial decay of the correlation functions are in agreement with transmission electron microscopy measurements.
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Whitehouse C, Fang J, Aggeli A, Bell M, Brydson R, Fishwick CWG, Henderson JR, Knobler CM, Owens RW, Thomson NH, Smith DA, Boden N. Adsorption and Self-Assembly of Peptides on Mica Substrates. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462160] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Whitehouse C, Fang J, Aggeli A, Bell M, Brydson R, Fishwick CWG, Henderson JR, Knobler CM, Owens RW, Thomson NH, Smith DA, Boden N. Adsorption and Self-Assembly of Peptides on Mica Substrates. Angew Chem Int Ed Engl 2005; 44:1965-8. [PMID: 15726554 DOI: 10.1002/anie.200462160] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Conor Whitehouse
- Centre for Self-Organising Molecular Systems, Department of Chemistry, University of Leeds, Leeds, LS2 9JT, UK.
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Abstract
Energy migration between tryptophan residues has been experimentally demonstrated in self-assembled peptide tapes. Each peptide contains 11 amino acids with a Trp at position 6. The peptide self-assembly is pH-sensitive and forms amphiphilic tapes, which further stack in ribbons (double tapes) and fibrils in water depending on the concentration. Fluorescence spectra, quenching, and anisotropy experiments showed that when the pH is lowered from 9 to 2, the peptide self-assembly buries the tryptophan in a hydrophobic and restricted environment in the interior of stable ribbons as expected on the basis of the peptide design. These fluorescence data support directly and for the first time the presence of such ribbons which are characterized by a highly packed and stable hydrophobic interior. In common with Trp in many proteins, fluorescence lifetimes are nonexponential, but the average lifetime is shorter at low pH, possibly due to quenching with neighboring Phe residues. Unexpectedly, time-resolved fluorescence anisotropy does not change significantly with self-assembly when in water. In highly viscous sucrose-water mixtures, the anisotropy decay at low pH was largely unchanged compared to that in water, whereas at high pH, the anisotropy decay increased significantly. We concluded that depolarization at low pH was not due to rotational diffusion but mainly due to energy migration between adjacent tryptophan residues. This was supported by a master equation kinetic model of Trp-Trp energy migration, which showed that the simulated and experimental results are in good agreement, although on average only three Trp residues were visited before emission.
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Affiliation(s)
- Veysel Kayser
- Department of Chemistry and Centre for Chemical Dynamics, University of Leeds, Leeds, LS2 9JT, UK
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Aggeli A, Bell M, Boden N, Carrick LM, Strong AE. Self-Assembling Peptide Polyelectrolyteβ-Sheet Complexes Form Nematic Hydrogels. Angew Chem Int Ed Engl 2003. [DOI: 10.1002/ange.200352207] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Affiliation(s)
- Amalia Aggeli
- Centre for Self-Organising Molecular Systems, Department of Chemistry, University of Leeds, Leeds LS2 9JT, UK
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36
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Aggeli A, Bell M, Carrick LM, Fishwick CWG, Harding R, Mawer PJ, Radford SE, Strong AE, Boden N. pH as a trigger of peptide beta-sheet self-assembly and reversible switching between nematic and isotropic phases. J Am Chem Soc 2003; 125:9619-28. [PMID: 12904028 DOI: 10.1021/ja021047i] [Citation(s) in RCA: 383] [Impact Index Per Article: 18.2] [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: 11/28/2022]
Abstract
The hierarchical self-assembly of rationally designed synthetic peptides into beta-sheet tapes, ribbons, fibrils, and fibers opens up potentially useful routes to soft-solidlike materials such as hydrogels, organogels, or liquid crystals. Here, it is shown how incorporation of Glu (-CH(2)CH(2)COOH) or Orn (-CH(2)CH(2)CH(2)NH(2)) into the primary structure of an 11 amino acid peptide enables self-assembly to be rapidly (seconds) and reversibly controlled by simply changing pH. Solutions of monomeric peptide, typically at concentrations in excess of 0.003 v/v, can be switched within seconds to, for example, nematic gel states comprised of interconnected orientationally ordered arrays of fibrils or vice versa. This is to be compared with the lyophilized peptide dissolution route to nematic fluids and gels which is impracticably long, taking many hours or even days. An important design principle, that stabilization of fibrillar dispersions requires of the order of one unit of net positive or negative charge per peptide molecule, is first demonstrated and then used to design an 11 amino acid peptide P(11)-3 (CH(3)CO-Gln-Gln-Arg-Phe-Gln-Trp-Gln-Phe-Gln-Gln-Gln-NH(2)) whose self-assembly behavior is independent of pH (1 < pH < 10). pH control is then incorporated by appropriately positioning Glu or Orn side chains so that the peptide-peptide free energy of interaction in the tapelike substructure is strongly influenced by direct electrostatic forces between gamma-COO(-) in Glu(-) or delta-NH(3)(+) in Orn(+), respectively. This design principle is illustrated by the behavior of two peptides: P(11)-4 (CH(3)CO-Gln-Gln-Arg-Phe-Glu-Trp-Glu-Phe-Glu-Gln-Gln-NH(2)) which can be switched from its nematic to its isotropic fluid state by increasing pH and P(11)-5 (CH(3)CO-Gln-Gln-Orn-Phe-Orn-Trp-Orn-Phe-Gln-Gln-Gln-NH(2)) designed to exhibit the converse behavior. Acid-base titrations of fibrillar dispersions reveal deprotonation of the gamma-COOH of Glu or of the delta-NH(3)(+) of Orn(+) occurs over wide bands of up to 5 pH units, a feature of polyelectrolytes. The values of the energy parameters controlling self-assembly can therefore be smoothly and continuously varied by changing pH. This enables isotropic fluid-to-nematic transitions to be triggered by relatively small additions of acid or base, typically 1 part in 10(3) by volume of 1 M HCl or NaOH.
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Affiliation(s)
- Amalia Aggeli
- Centre for Self-Organising Molecular Systems, University of Leeds, UK
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Aggeli A, Fytas G, Vlassopoulos D, McLeish TC, Mawer PJ, Boden N. Structure and dynamics of self-assembling beta-sheet peptide tapes by dynamic light scattering. Biomacromolecules 2003; 2:378-88. [PMID: 11749196 DOI: 10.1021/bm000080z] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [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: 11/29/2022]
Abstract
Oligomeric peptides can be designed which undergo one-dimensional self-assembly in solution to form beta-sheet tapes a single molecule in thickness and micrometers in length.(1) In this paper, we present the first systematic investigation of the size, shape, dynamics, and interactions of beta-sheet tapes formed by a self-assembling 24-residue peptide, K24, in 2-chloroethanol, over a wide range of peptide concentrations c (c: 10(-7)-1 mM), using photon correlation spectroscopy. The tapes behave like semiflexible chains with persistence lengths of several hundred nanometers and much longer contour lengths, even at c approximately 0.1 nM. The polarized q-dependent light-scattering intensity I fits a model of a prolate object with major and minor axes alpha approximately 630 nm and beta approximately 40 nm. This is an unexpected result in view of the previous theoretical predictions that tapelike polymers could form oblate coinlike structures in solution.(2) This experimentally observed behavior is attributed to the pronounced twist and bend of the beta-tapes, which do not allow them to form the coinlike structures, but instead they favor the formation of elongated polymers. At c approximately 10(-2) mM, the tapes are seen to start overlapping and forming networks with unusually large mesh sizes (e.g., ca. 400 nm at 15 mciroM), much larger than those of conventional polymers. With increasing peptide concentration the mesh size decreases and the network becomes a physical gel at c approximately 0.4 mM. These semidilute solutions are characterized by one main relaxation mode associated with the cooperative diffusion of the entangled tape network, and a weaker slower mode, associated with gel cluster formation. The concentration dependence of xi (xi(c) approximately c(-0.34)) is much weaker compared to the expected scaling for Gaussian or swollen chains (xi(c) approximately c(-1) for Gaussian chains, or xi(c) approximately c(-3/4) for swollen ones), but is not inconsistent with the expected scaling for rigid rods. On the basis of the concentration dependencies of the light-scattering intensity I and of the cooperative diffusion coefficient D, the cooperative friction coefficient f(c) is found to display a stronger concentration dependence (f(c) approximately c(1.34)) than in the case of semidilute flexible and semiflexible polymer solutions (f(c) approximately c(0.5)).(3) Thus, we may conclude that the network of entangled tapes approximates in its behavior that of semirigid polymers.
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Affiliation(s)
- A Aggeli
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), P.O.Box 1527, 71110 Heraklion, Crete, Greece.
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Aggeli A, Nyrkova IA, Bell M, Harding R, Carrick L, McLeish TC, Semenov AN, Boden N. Hierarchical self-assembly of chiral rod-like molecules as a model for peptide beta -sheet tapes, ribbons, fibrils, and fibers. Proc Natl Acad Sci U S A 2001; 98:11857-62. [PMID: 11592996 PMCID: PMC59814 DOI: 10.1073/pnas.191250198] [Citation(s) in RCA: 768] [Impact Index Per Article: 33.4] [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: 11/18/2022] Open
Abstract
A generic statistical mechanical model is presented for the self-assembly of chiral rod-like units, such as beta-sheet-forming peptides, into helical tapes, which with increasing concentration associate into twisted ribbons (double tapes), fibrils (twisted stacks of ribbons), and fibers (entwined fibrils). The finite fibril width and helicity is shown to stem from a competition between the free energy gain from attraction between ribbons and the penalty because of elastic distortion of the intrinsically twisted ribbons on incorporation into a growing fibril. Fibers are stabilized similarly. The behavior of two rationally designed 11-aa residue peptides, P(11)-I and P(11)-II, is illustrative of the proposed scheme. P(11)-I and P(11)-II are designed to adopt the beta-strand conformation and to self-assemble in one dimension to form antiparallel beta-sheet tapes, ribbons, fibrils, and fibers in well-defined solution conditions. The energetic parameters governing self-assembly have been estimated from the experimental data using the model. The 8-nm-wide fibrils consist of eight tapes, are extremely robust (scission energy approximately 200 k(B)T), and sufficiently rigid (persistence length l(fibril) approximately 20-70 microm) to form nematic solutions at peptide concentration c approximately 0.9 mM (volume fraction approximately 0.0009 vol/vol), which convert to self-supporting nematic gels at c > 4 mM. More generally, these observations provide a new insight into the generic self-assembling properties of beta-sheet-forming peptides and shed new light on the factors governing the structures and stability of pathological amyloid fibrils in vivo. The model also provides a prescription of routes to novel macromolecules based on a variety of self-assembling chiral units, and protocols for extraction of the associated energy changes.
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Affiliation(s)
- A Aggeli
- Centre for Self-Organising Molecular Systems, Department of Applied Mathematics, University of Leeds LS2 9JT, United Kingdom
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Benaki DC, Aggeli A, Chryssikos GD, Yiannopoulos YD, Kamitsos EI, Brumley E, Case ST, Boden N, Hamodrakas SJ. Laser-Raman and FT-IR spectroscopic studies of peptide-analogues of silkmoth chorion protein segments. Int J Biol Macromol 1998; 23:49-59. [PMID: 9644596 DOI: 10.1016/s0141-8130(98)00032-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 02/07/2023]
Abstract
Silkmoth chorion, the proteinaceous major component of the eggshell, with extraordinary mechanical and physiological properties, consists of a complex set of proteins, which have a tripartite structure: a central, evolutionarily conserved, domain and two more variable 'arms'. Peptide-analogues of silkmoth chorion protein central domain segments have been synthesized. Laser-Raman and infrared spectroscopic studies suggest the preponderance of antiparallel beta-pleated sheet structure for these peptides, both in solution and in the solid state.
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Affiliation(s)
- D C Benaki
- Department of Biology, University of Athens, Greece
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41
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Aggeli A, Bannister ML, Bell M, Boden N, Findlay JB, Hunter M, Knowles PF, Yang JC. Conformation and ion-channeling activity of a 27-residue peptide modeled on the single-transmembrane segment of the IsK (minK) protein. Biochemistry 1998; 37:8121-31. [PMID: 9609707 DOI: 10.1021/bi972112h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
IsK (minK) protein, in concert with another channel protein KVLQT1, mediates a distinct, slowly activating, voltage-gated potassium current across certain mammalian cell membranes. Site-directed mutational studies have led to the proposal that the single transmembrane segment of IsK participates in the pore of the potassium channel [Takumi, T. (1993) News Physiol. Sci. 8, 175-178]. We present functional and structural studies of a short peptide (K27) with primary structure NH2-1KLEALYILMVLGFFGFFTLGIMLSYI27R-COOH, corresponding to the transmembrane segment of IsK (residues 42-68). When K27 was incorporated, at low concentrations, into phosphatidylethanolamine, black-lipid membranes, single-channel activity was observed, with no strong ion selectivity. IR measurements reveal the peptide has a predominantly helical conformation in the membrane. The atomic resolution structure of the helix has been established by high-resolution 1H NMR spectroscopy studies. These studies were carried out in a solvent comprising 86% v/v 1,1,1,3,3,3-hexafluoro-isopropanol-14% v/v water, in which the IR spectrum of the peptide was found to be very similar to that observed in the bilayer. The NMR studies have established that residues 1-3 are disordered, while residues 4-27 have an alpha-helical conformation, the helix being looser near the termini and more stable in the central region of the molecule. The length (2. 6 nm) of the hydrophobic segment of the helix, residues 7-23, matches the span of the hydrocarbon chains (2.3 +/- 0.25 nm) of fully hydrated bilayers of phosphatidylcholine lipid mixture from egg yolk. The side chains on the helix surface are predominantly hydrophobic, consistent with a transmembrane location of the helix. The ion-channeling activity is believed to stem from long-lived aggregates of these helices. The aggregation is mediated by the pi-pi stacking of phenylalanine aromatic rings of adjacent helices and favorable interactions of the opposing aliphatic-like side chains, such as leucine and methionine, with the lipid chains of the bilayer. This mechanism is in keeping with site-directed mutational studies which suggest that the transmembrane segment of IsK is an integral part of the pore of the potassium channel and has a similar disposition to that in the peptide model system.
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Affiliation(s)
- A Aggeli
- Centre for Self-Organising Molecular Systems, University of Leeds, U.K
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Aggeli A, Bell M, Boden N, Keen JN, Knowles PF, McLeish TC, Pitkeathly M, Radford SE. Responsive gels formed by the spontaneous self-assembly of peptides into polymeric beta-sheet tapes. Nature 1997; 386:259-62. [PMID: 9069283 DOI: 10.1038/386259a0] [Citation(s) in RCA: 597] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Molecular self-assembly is becoming an increasingly popular route to new supramolecular structures and molecular materials. The inspiration for such structures is commonly derived from self-assembling systems in biology. Here we show that a biological motif, the peptide beta-sheet, can be exploited in designed oligopeptides that self-assemble into polymeric tapes and with potentially useful mechanical properties. We describe the construction of oligopeptides, rationally designed or based on segments of native proteins, that aggregate in suitable solvents into long, semi-flexible beta-sheet tapes. These become entangled even at low volume fractions to form gels whose viscoelastic properties can be controlled by chemical (pH) or physical (shear) influences. We suggest that it should be possible to engineer a wide range of properties in these gels by appropriate choice of the peptide primary structure.
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Affiliation(s)
- A Aggeli
- Centre for Self-Organising Molecular Systems, The University of Leeds, UK
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Aggeli A, Bell M, Boden N, Keen JN, McLeish TCB, Nyrkova I, Radford SE, Semenov A. Engineering of peptide β-sheet nanotapes. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a701088e] [Citation(s) in RCA: 138] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aggeli A, Boden N, Cheng YL, Findlay JB, Knowles PF, Kovatchev P, Turnbull PJ. Peptides modeled on the transmembrane region of the slow voltage-gated IsK potassium channel: structural characterization of peptide assemblies in the beta-strand conformation. Biochemistry 1996; 35:16213-21. [PMID: 8973194 DOI: 10.1021/bi960891g] [Citation(s) in RCA: 31] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A 27-residue peptide, having a sequence corresponding to the transmembrane domain of the IsK protein with slow voltage-gated potassium channel activity, has been incorporated into synthetic saturated-chain phospholipid membranes. The peptide-lipid complexes have been characterized by attenuated-total-reflection Fourier-transform-infrared spectroscopy (ATR-FTIR), spin-label electron spin resonance (ESR) spectroscopy, 31P and 2H nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry, and low-angle X-ray diffraction. From FTIR spectroscopy, it is found that, when reconstituted into membranes by dialysis from 2-chloroethanol, the peptide has a predominantly beta-strand secondary structure in which the peptide backbone is oriented at an angle of approximately 56 degrees relative to the membrane normal in dry films of phosphatidylcholines. Hydration of the dry film in the gel phase does not appear to affect the orientation of the peptide backbone, and a relatively small change in orientation occurs when the bilayer undergoes the transition to the fluid phase. The ESR and NMR spectra from spin-labeled and 2H-labeled phospholipids, respectively, indicate that the incorporated peptide restricts the rotational motion of the lipids, without appreciably affecting the chain order, in a way similar to that found for integral membrane proteins. The characteristic two-component ESR spectra from spin-labeled lipids further indicate a selectivity in the interaction of anionic phospholipids with the peptide. The motional restriction of the chains of the spin-labeled phosphatidylcholine and the reduction in the enthalpy of the lipid chain-melting transition indicate that, on average, approximately two to three phospholipid molecules interact directly with each peptide monomer, which is consistent with a limited degree of aggregation of the beta-sheet structures. Both 31P NMR spectroscopy and X-ray diffraction indicate that the lipid-peptide complexes have a lamellar structure up to the highest peptide concentration studied (Rp = 0.2). The surface area occupied by lipid molecules (ca. 30 A2 per chain) in the peptide complexes, deduced from the lamellar repeat spacings at defined water content, is very similar to that in pure fluid lipid bilayers, consistent with the 2H NMR results. The additional membrane surface area contributed by the peptide is approximately 112 A2 per monomer. This large value for the peptide area in the fluid bilayer is consistent with the ATR studies of dry peptide/lipid films which suggest that the long axis of the beta-strand is strongly tilted with respect to the bilayer normal (56 degrees in the dry film).
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Affiliation(s)
- A Aggeli
- Centre for Self-Organising Molecular Systems, University of Leeds, UK
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Aggeli A, Hamodrakas SJ, Komitopoulou K, Konsolaki M. Tandemly repeating peptide motifs and their secondary structure in Ceratitis capitata eggshell proteins Ccs36 and Ccs38. Int J Biol Macromol 1991; 13:307-15. [PMID: 1801905 DOI: 10.1016/0141-8130(91)90032-p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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: 12/28/2022]
Abstract
Evidence from amino acid composition, Fourier transform analysis of primary structure and secondary structure prediction suggests a tripartite structure for Ceratitis capitata eggshell proteins Ccs36 and Ccs38, which consists of a central domain and two flanking 'arms'. The proteins, apparently, contain tandemly repeating peptide motifs specific for each domain of the tripartite structure. The central domain of both proteins, which exhibits extensive sequence homology with the corresponding domains of Drosophila melanogaster proteins s36 and s38, is formed by tandem repeats of an octapeptide-X-X-X-Z-Z-Z-Z-Z- (where X = large hydrophobic residue and Z = beta-turn former residue) and its variants. It is predicted to adopt a compact, most probably twisted, antiparallel beta-pleated sheet structure of beta-sheet strands regularly alternating with beta-turns or loops. The central domains of Ccs36 and Ccs38 share structural similarities, but they are recognizably different. The 'arms' of the proteins presumably serving for protein and species-specific functions differ substantially from those of Drosophila melanogaster. In Ccs36, the C-terminal 'arm' is formed by, almost precise, tandem repeats of an octapeptide-Y-X-A-A-P-A-A-S- (X = G or S), whereas the N-terminal 'arm' contains repeats of the octapeptide -Z-Z-Z-A-X-A-A-Z- (X = Q, N or E and Z a beta-turn former). In both 'arms' alpha-helices are predicted, alternating with beta-turns.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A Aggeli
- Department of Biochemistry, Cell and Molecular Biology and Genetics, University of Athens, Greece
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