1
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Huang SQ, Zhang HM, Zhang YC, Wang LY, Zhang ZR, Zhang L. Comparison of two methods for tumour-targeting peptide modification of liposomes. Acta Pharmacol Sin 2023; 44:832-840. [PMID: 36271156 PMCID: PMC10043035 DOI: 10.1038/s41401-022-01011-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 09/27/2022] [Indexed: 11/09/2022] Open
Abstract
Liposomes decorated with tumour-targeting cell-penetrating peptides can enhance specific drug delivery at the tumour site. The TR peptide, c(RGDfK)-AGYLLGHINLHHLAHL(Aib)HHIL, is pH-sensitive and actively targets tumour cells that overexpress integrin receptor αvβ3, such as B16F10 melanoma cells. Liposomes can be modified with the TR peptide by two different methods: utilization of the cysteine residue on TR to link DSPE-PEG2000-Mal contained in the liposome formula (LIPTR) or decoration of TR with a C18 stearyl chain (C18-TR) for direct insertion into the liposomal phospholipid bilayer through electrostatic and hydrophobic interactions (LIPC18-TR). We found that both TR and C18-TR effectively reversed the surface charge of the liposomes when the systems encountered the low pH of the tumour microenvironment, but LIPC18-TR exhibited a greater increase in the charge, which led to higher cellular uptake efficiency. Correspondingly, the IC50 values of PTX-LIPTR and PTX-LIPC18-TR in B16F10 cells in vitro were 2.1-fold and 2.5-fold lower than that of the unmodified PTX-loaded liposomes (PTX-LIP), respectively, in an acidic microenvironment (pH 6.3). In B16F10 tumour-bearing mice, intravenous administration of PTX-LIPTR and PTX-LIPC18-TR (8 mg/kg PTX every other day for a total of 4 injections) caused tumour reduction ratios of 39.4% and 56.1%, respectively, compared to 20.8% after PTX-LIP administration. Thus, we demonstrated that TR peptide modification could improve the antitumour efficiency of liposomal delivery systems, with C18-TR presenting significantly better results. After investigating different modification methods, our data show that selecting an adequate method is vital even when the same molecule is used for decoration.
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Affiliation(s)
- Shi-Qi Huang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China
| | - Han-Ming Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China
| | - Yi-Cong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China
| | - Lu-Yao Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China
| | - Ling Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy; College of Polymer Science and Engineering; Med-X Center for Materials, Sichuan University, Chengdu, 610041, China.
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2
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Novelli F, Strofaldi A, De Santis S, Del Giudice A, Casciardi S, Galantini L, Morosetti S, Pavel NV, Masci G, Scipioni A. Polymorphic Self-Organization of Lauroyl Peptide in Response to pH and Concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3941-3951. [PMID: 32118446 DOI: 10.1021/acs.langmuir.9b02924] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Amphipathic peptides are attractive building blocks for the preparation of self-assembling, bio-inspired, and stimuli responsive nanomaterials with pharmaceutical interest. The bioavailability of these materials can be improved with the insertion of d amino acid residues to avoid fast proteolysis in vivo. With this knowledge, a new lauroyl peptide consisting of a sequence of glycine, glycine, d-serine, and d-lysine was designed. In spite of its simple sequence, this lipopeptide self-assembles into spherical micelles at acid pH, when the peptide moiety adopts disordered conformations. Self-aggregates reshape toward fibers at basic pH, following the conformational transition of the peptide region from random coil to β-sheet. Finally, hydrogels are achieved at basic pH and higher concentrations. The transition from random coil to β-sheet conformation of the peptide headgroup obtained by increasing pH was monitored by circular dichroism and vibrational spectroscopy. A structural analysis, performed by combining dynamic light scattering, small-angle X-ray scattering, transmission electron microscopy, and molecular dynamic simulations, demonstrated that the transition allows the self-assemblies to remodel from spherical micelles to rodlike shapes, to long fibers with rectangular cross-section and a head-tail-tail-head structure. The viscoelastic behavior of the hydrogels formed at the highest pH was investigated by rheology measurements.
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Affiliation(s)
- Federica Novelli
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Alessandro Strofaldi
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Serena De Santis
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Alessandra Del Giudice
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Stefano Casciardi
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, National Institute for Insurance against Accidents at Work (INAIL Research), Rome 00144, Italy
| | - Luciano Galantini
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Stefano Morosetti
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Nicolae V Pavel
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Giancarlo Masci
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
| | - Anita Scipioni
- Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro, 5, Rome 00185, Italy
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3
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Liu K, Yang L, Peng X, Wang J, Lu JR, Xu H. Modulation of Antimicrobial Peptide Conformation and Aggregation by Terminal Lipidation and Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1737-1744. [PMID: 32009405 DOI: 10.1021/acs.langmuir.9b03774] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The function and properties of peptide-based materials depend not only on the amino acid sequence but also on the molecular conformations. In this paper, we chose a series of peptides Gm(XXKK)nX-NH2 (m = 0, 3; n = 2, 3; X = I, L, and V) as the model molecules and studied the conformation regulation through N-terminus lipidation and their formulation with surfactants. The structural and morphological transition of peptide self-assemblies have also been investigated via transmission electron microscopy, atomic force microscopy, circular dichroism spectroscopy, and small-angle neutron scattering. With the terminal alkylation, the molecular conformation changed from random coil to β-sheet or α-helix. The antimicrobial activities of alkylated peptide were different. C16-G3(IIKK)3I-NH2 showed antimicrobial activity against Streptococcus mutans, while C16-(IIKK)2I-NH2 and C16-G3(IIKK)2I-NH2 did not kill the bacteria. The surfactant sodium dodecyl sulfonate could rapidly induce the self-assemblies of alkylated peptides (C16-(IIKK)2I-NH2, C16-G3(IIKK)2I-NH2, C16-G3(VVKK)2V-NH2) from nanofibers to micelles, along with the conformation changing from β-sheet to α-helix. The cationic surfactant hexadecyl trimethyl ammonium bromide made the lipopeptide nanofibers thinner, and nonionic surfactant polyoxyethylene (23) lauryl ether (C12EO23) induced the nanofibers much more intensively. Both the activity and the conformation of the α-helical peptide could be modulated by lipidation. Then, the self-assembled morphologies of alkylated peptides could also be further regulated with surfactants through hydrophobic, electrostatic, and hydrogen-bonding interactions. These results provided useful strategies to regulate the molecular conformations in peptide-based material functionalization.
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Affiliation(s)
- Kang Liu
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , Qingdao 266580 , China
| | - Liuxin Yang
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , Qingdao 266580 , China
| | - Xiaoting Peng
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , Qingdao 266580 , China
| | - Jiqian Wang
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , Qingdao 266580 , China
| | - Jian Ren Lu
- Biological Physics Group, School of Physics and Astronomy , University of Manchester , Oxford Road , Manchester M13 9PL , U.K
| | - Hai Xu
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , Qingdao 266580 , China
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4
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Sanderson JM. Far from Inert: Membrane Lipids Possess Intrinsic Reactivity That Has Consequences for Cell Biology. Bioessays 2020; 42:e1900147. [PMID: 31995246 DOI: 10.1002/bies.201900147] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/06/2019] [Indexed: 12/19/2022]
Abstract
In this article, it is hypothesized that a fundamental chemical reactivity exists between some non-lipid constituents of cellular membranes and ester-based lipids, the significance of which is not generally recognized. Many peptides and smaller organic molecules have now been shown to undergo lipidation reactions in model membranes in circumstances where direct reaction with the lipid is the only viable route for acyl transfer. Crucially, drugs like propranolol are lipidated in vivo with product profiles that are comparable to those produced in vitro. Some compounds have also been found to promote lipid hydrolysis. Drugs with high lytic activity in vivo tend to have higher toxicity in vitro. Deacylases and lipases are proposed as key enzymes that protect cells against the effects of intrinsic lipidation. The toxic effects of intrinsic lipidation are hypothesized to include a route by which nucleation can occur during the formation of amyloid fibrils.
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5
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Sivadas VP, Dhawan S, Babu J, Haridas V, Nair PD. Glutamic acid-based dendritic peptides for scaffold-free cartilage tissue engineering. Acta Biomater 2019; 99:196-210. [PMID: 31521812 DOI: 10.1016/j.actbio.2019.09.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/17/2019] [Accepted: 09/10/2019] [Indexed: 12/30/2022]
Abstract
Current treatment modalities for cartilage regeneration often result in the production of fibrous-type cartilage tissue at the defect site, which has inferior mechanical properties as compared to native hyaline cartilage. Further, effective treatments are not available at present, for preventing age-related as well as disease-related hypertrophic development of chondrocytes. In the present study, we designed and synthesized three sets of glutamic acid-based dendritic peptides, differing in degree of lipidation as well as branching. Each set constitutes of N-terminal protected as well as corresponding N-deprotected peptides. Altogether, six peptides [BE12, E12, BE3(12)4, E3(12)4, BE3OMe, E3OMe] were tested for their chondrogenesis enhancing potential in vitro, using rabbit adipose derived mesenchymal stem cells (ADMSCs). Immunohistochemical and gene expression studies as well as biochemical analyses revealed that the lipopeptides [E12 and BE3(12)4] are able to enhance chondrogenic differentiation of ADMSCs significantly (p < 0.001) as compared to control group (chondrogenic medium alone). Glycosaminoglycan content, and the chondrogenic marker genes like Aggrecan (Acan), Type II collagen (Col2a1), Hyaluronan synthase 2 (Has2), and SRY-box 9 (Sox9) expressions were found to be significantly increased in E12 and BE3(12)4 treated groups. Most importantly, the BE3(12)4 treated group showed significantly lower Type I collagen (Col1a2) and Type X collagen (Col10a1) transcript levels (p < 0.001), indicating its potential for hyaline cartilage formation and also to prevent hypertrophic development. Thus, the lipopeptides E12 and BE3(12)4 may be useful for preventing chondrocyte hypertrophy and realizing the hyaline nature of regenerated cartilage tissue in tissue engineering. STATEMENT OF SIGNIFICANCE: The current treatment modalities for degenerative cartilage diseases are unsatisfactory as the resultant regenerated cartilage is often fibrous in nature with inferior mechanical properties. Further, there is no proper treatment available for age-related development of chondrocyte hypertrophy at present. In this study we synthesized glutamic acid-based lipopeptides, which differ in the degree of lipidation as well as branching. We used a combinatorial approach of scaffold-free tissue engineering and dendritic lipopeptides to achieve hyaline-like cartilage tissue from adipose derived mesenchymal stem cells in vitro. Gene expression analysis revealed the down regulation of fibrous cartilage marker Col1a2 and hypertrophic marker Col10a1, suggesting that these lipopeptides may be useful for achieving mechanically superior hyaline cartilage regeneration in future.
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Affiliation(s)
- V P Sivadas
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Poojapura, Thiruvananthapuram, Kerala 695012, India
| | - Sameer Dhawan
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Jisha Babu
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - V Haridas
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Poojapura, Thiruvananthapuram, Kerala 695012, India.
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6
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Activating the Intrinsic Pathway of Apoptosis Using BIM BH3 Peptides Delivered by Peptide Amphiphiles with Endosomal Release. MATERIALS 2019; 12:ma12162567. [PMID: 31408950 PMCID: PMC6719084 DOI: 10.3390/ma12162567] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/02/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022]
Abstract
Therapeutic manipulation of the BCL-2 family using BH3 mimetics is an emerging paradigm in cancer treatment and immune modulation. For example, peptides mimicking the BIM BH3 helix can directly target the full complement of anti- and pro-apoptotic BCL-2 proteins to trigger apoptosis. This study has incorporated the potent BH3 α-helical death domain of BIM into peptide amphiphile (PA) nanostructures designed to facilitate cellular uptake and induce cell death. This study shows that these PA nanostructures are quickly incorporated into cells, are able to specifically bind BCL-2 proteins, are stable at physiologic temperatures and pH, and induce dose-dependent apoptosis in cells. The incorporation of a cathepsin B cleavable linker between the BIM BH3 peptide and the hydrophobic tail resulted in increased intracellular accumulation and mitochondrial co-localization of the BIM BH3 peptide while also improving BCL-2 family member binding and apoptotic reactivation. This PA platform represents a promising new strategy for intracellular therapeutic peptide delivery for the disruption of intracellular protein:protein interactions.
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7
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Wang S, Wang T, Zhang J, Xu S, Liu H. Disruption of Tumor Cells Using a pH-Activated and Thermosensitive Antitumor Lipopeptide Containing a Leucine Zipper Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8818-8827. [PMID: 29914261 DOI: 10.1021/acs.langmuir.8b00474] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Antitumor peptides may potentially alleviate the problem of chemoresistance but do not yet target tumor cells and would be cytotoxic to normal cells. Here, we designed a pH-activated and thermosensitive lipopeptide (C6-Pep) containing a leucine zipper and an alkyl chain and assessed the ability of C6-Pep to kill cancer cells. Pep, the same sequence without the N-terminal hexanoic acid moiety, was generated as a less hydrophobic control. First, lipopeptide adsorption into lipid monolayers was studied using Langmuir-Blodgett and polarization modulation infrared reflection adsorption spectroscopy. Under weakly acid conditions, electrostatic interactions between C6-Pep and negatively charged phospholipids increased the adsorption/insertion of C6-Pep (vs Pep) into lipid monolayers. Cargo leakage from liposomes was assayed to model lipopeptide-induced lipid membrane disruption. The ability of C6-Pep to disrupt liposomes depended on the peptide molecular structure/hydrophobicity, solution pH, and temperature-induced uncoiling of the zipper structure; the greatest cargo leakage from the liposome with negative charge was observed for C6-Pep at pH 5.5 under mildly hyperthermic conditions (45 °C). In vitro, C6-Pep was significantly more cytotoxic toward HeLa cells at pH 5.5 under hyperthermic conditions than at pH 7.4 and/or 37 °C. Overall, this study demonstrates that amphipathic C6-Pep can insert into cell membranes in the low-pH tumor microenvironment, whereas the application of heat promotes the uncoiling of the zipper structure, leading to the disruption of tumor cell membranes and cell death. pH-activated and thermosensitive C6-Pep represents a promising tool to kill cancer cells via a strategy that does not invoke chemoresistance and may have low side effects.
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Affiliation(s)
- Sijia Wang
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Tong Wang
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Junqi Zhang
- Key Laboratory of Medical Molecular Virology (MOE & MOH), School of Basic Medical Sciences , Fudan University , Shanghai 200032 , PR China
| | - Shouhong Xu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
| | - Honglai Liu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , PR China
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8
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Li Y, Lock LL, Wang Y, Ou SH, Stern D, Schön A, Freire E, Xu X, Ghose S, Li ZJ, Cui H. Bioinspired supramolecular engineering of self-assembling immunofibers for high affinity binding of immunoglobulin G. Biomaterials 2018; 178:448-457. [PMID: 29706234 DOI: 10.1016/j.biomaterials.2018.04.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 01/14/2023]
Abstract
Many one-dimensional (1D) nanostructures are constructed by self-assembly of peptides or peptide conjugates containing a short β-sheet sequence as the core building motif essential for the intermolecular hydrogen bonding that promotes directional, anisotropic growth of the resultant assemblies. While this molecular engineering strategy has led to the successful production of a plethora of bioactive filamentous β-sheet assemblies for interfacing with biomolecules and cells, concerns associated with effective presentation of α-helical epitopes and their function preservation have yet to be resolved. In this context, we report on the direct conjugation of the protein A mimicking peptide Z33, a motif containing two α-helices, to linear hydrocarbons to create self-assembling immuno-amphiphiles (IAs). Our results suggest that the resulting amphiphilic peptides can, despite lacking the essential β-sheet segment, effectively associate under physiological conditions into supramolecular immunofibers (IFs) while preserving their native α-helical conformation. Isothermal titration calorimetry (ITC) measurements confirmed that these self-assembling immunofibers can bind to the human immunoglobulin G class 1 (IgG1) with high specificity at pH 7.4, but with significantly weakened binding at pH 2.8. We further demonstrated the accessibility of Z33 ligand in the immunofibers using transmission electron microscopy (TEM) and confocal imaging. We believe these results shed important light into the supramolecular engineering of α-helical peptides into filamentous assemblies that may possess an important potential for antibody isolation.
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Affiliation(s)
- Yi Li
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - Lye Lin Lock
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Devens, MA 01434, United States
| | - Yuzhu Wang
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - Shih-Hao Ou
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - David Stern
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - Arne Schön
- Department of Biology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - Ernesto Freire
- Department of Biology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States
| | - Xuankuo Xu
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Devens, MA 01434, United States.
| | - Sanchayita Ghose
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Devens, MA 01434, United States
| | - Zheng Jian Li
- Biologics Process Development, Global Product Development and Supply, Bristol-Myers Squibb, Devens, MA 01434, United States
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States; Department of Oncology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States.
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9
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Sun L, Zheng C, Webster TJ. Self-assembled peptide nanomaterials for biomedical applications: promises and pitfalls. Int J Nanomedicine 2016; 12:73-86. [PMID: 28053525 PMCID: PMC5191618 DOI: 10.2147/ijn.s117501] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Over the last several decades, a great number of advances have been made in the area of self-assembled supramolecules for regenerative medicine. Such advances have involved the design, preparation, and characterization of brand new self-assembled peptide nanomaterials for a variety of applications. Among all biomolecules considered for self-assembly applications, peptides have attracted a great deal of attention as building blocks for bottom-up fabrication, due to their versatility, ease of manufacturing, low costs, tunable structures, and versatile properties. Herein, some of the more exciting new designs of self-assembled peptides and their associated unique features are reviewed and several promising applications of how self-assembled peptides are advancing drug delivery, tissue engineering, antibacterial therapy, and biosensor device applications are highlighted.
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Affiliation(s)
- Linlin Sun
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Chunli Zheng
- Pharmaceutical Research Institute, China Pharmaceutical University, Nanjing, People’s Republic of China
| | - Thomas J Webster
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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10
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Zha RH, Sur S, Boekhoven J, Shi HY, Zhang M, Stupp SI. Supramolecular assembly of multifunctional maspin-mimetic nanostructures as a potent peptide-based angiogenesis inhibitor. Acta Biomater 2015; 12:1-10. [PMID: 25462852 PMCID: PMC4274202 DOI: 10.1016/j.actbio.2014.11.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 10/06/2014] [Accepted: 11/03/2014] [Indexed: 12/13/2022]
Abstract
Aberrant angiogenesis plays a large role in pathologies ranging from tumor growth to macular degeneration. Anti-angiogenic proteins have thus come under scrutiny as versatile, potent therapeutics but face problems with purification and tissue retention. We report here on the synthesis of supramolecular nanostructures that mimic the anti-angiogenic activity of maspin, a class II tumor suppressor protein. These maspin-mimetic nanostructures are formed via self-assembly of small peptide amphiphiles containing the g-helix motif of maspin. Using tubulogenesis assays with human umbilical vein endothelial cells, we demonstrate that maspin-mimetic nanostructures show anti-angiogenic activity at concentrations that are significantly lower than those necessary for the g-helix peptide. Furthermore, in vivo assays in the chick chorioallantoic membrane show maspin-mimetic nanostructures to be effective over controls at inhibiting angiogenesis. Thus, the nanostructures investigated here offer an attractive alternative to the use of anti-angiogenic recombinant proteins in the treatment of cancer or other diseases involving abnormal blood vessel formation.
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Affiliation(s)
- R Helen Zha
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA; Simpson Querrey Institute for BioNanotechnology, Northwestern University, 303 East Superior Street, Lurie Suite 11-131, Chicago, IL 60611, USA
| | - Shantanu Sur
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, 303 East Superior Street, Lurie Suite 11-131, Chicago, IL 60611, USA
| | - Job Boekhoven
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, 303 East Superior Street, Lurie Suite 11-131, Chicago, IL 60611, USA
| | - Heidi Y Shi
- Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, 320 East Superior Street, Searle Suite 8-150, Chicago, IL 60611, USA
| | - Ming Zhang
- Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, 320 East Superior Street, Searle Suite 8-150, Chicago, IL 60611, USA
| | - Samuel I Stupp
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA; Simpson Querrey Institute for BioNanotechnology, Northwestern University, 303 East Superior Street, Lurie Suite 11-131, Chicago, IL 60611, USA; Department of Medicine, Northwestern University, 251 East Huron Street, Galter Suite 3-150, Chicago, IL 60611, USA.
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11
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Jeong WJ, Lim YB. Macrocyclic Peptides Self-Assemble into Robust Vesicles with Molecular Recognition Capabilities. Bioconjug Chem 2014; 25:1996-2003. [DOI: 10.1021/bc500367z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Woo-jin Jeong
- Translational Research Center for Protein Function Control and Department of Materials Science & Engineering, Yonsei University, Seoul 120-749, Korea
| | - Yong-beom Lim
- Translational Research Center for Protein Function Control and Department of Materials Science & Engineering, Yonsei University, Seoul 120-749, Korea
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12
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López Deber MP, Hickman DT, Nand D, Baldus M, Pfeifer A, Muhs A. Engineering amyloid-like assemblies from unstructured peptides via site-specific lipid conjugation. PLoS One 2014; 9:e105641. [PMID: 25207975 PMCID: PMC4160191 DOI: 10.1371/journal.pone.0105641] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 07/22/2014] [Indexed: 11/21/2022] Open
Abstract
Aggregation of amyloid beta (Aβ) into oligomers and fibrils is believed to play an important role in the development of Alzheimer’s disease (AD). To gain further insight into the principles of aggregation, we have investigated the induction of β-sheet secondary conformation from disordered native peptide sequences through lipidation, in 1–2% hexafluoroisopropanol (HFIP) in phosphate buffered saline (PBS). Several parameters, such as type and number of lipid chains, peptide sequence, peptide length and net charge, were explored keeping the ratio peptide/HFIP constant. The resulting lipoconjugates were characterized by several physico-chemical techniques: Circular Dichroism (CD), Attenuated Total Reflection InfraRed (ATR-IR), Thioflavin T (ThT) fluorescence, Dynamic Light Scattering (DLS), solid-state Nuclear Magnetic Resonance (ssNMR) spectroscopy and Electron Microscopy (EM). Our data demonstrate the generation of β-sheet aggregates from numerous unstructured peptides under physiological pH, independent of the amino acid sequence. The amphiphilicity pattern and hydrophobicity of the scaffold were found to be key factors for their assembly into amyloid-like structures.
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Affiliation(s)
| | | | - Deepak Nand
- Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - Marc Baldus
- Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
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13
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Chu BK, Fu IW, Markegard CB, Choi SE, Nguyen HD. A Tail of Two Peptide Amphiphiles: Effect of Conjugation with Hydrophobic Polymer on Folding of Peptide Sequences. Biomacromolecules 2014; 15:3313-20. [DOI: 10.1021/bm500733h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brian K. Chu
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
| | - Iris W. Fu
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
| | - Cade B. Markegard
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
| | - Seong E. Choi
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
| | - Hung D. Nguyen
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
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14
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Meng Q, Kou Y, Ma X, Guo L, Liu K. Nanostructures from the self-assembly of α
-helical peptide amphiphiles. J Pept Sci 2014; 20:223-8. [DOI: 10.1002/psc.2606] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 11/19/2013] [Accepted: 11/26/2013] [Indexed: 01/02/2023]
Affiliation(s)
- Qingbin Meng
- Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China
| | - Yingying Kou
- Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China
| | - Xin Ma
- Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China
| | - Lei Guo
- Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China
| | - Keliang Liu
- Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China
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15
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Akram M, Kumar D, Kabir-ud-Din. Zinc dipeptide complex ([Zn(II)–Gly–Tyr]+)–ninhydrin reaction in the presence of gemini surfactants: A kinetic study. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.09.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Han SH, Lee MK, Lim YB. Bioinspired Self-Assembled Peptide Nanofibers with Thermostable Multivalent α-Helices. Biomacromolecules 2013; 14:1594-9. [DOI: 10.1021/bm400233x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- So-hee Han
- Translational Research Center for Protein
Function Control and Department of Materials
Science and Engineering, Yonsei University, Seoul 120-749, Korea
| | - Mun-kyung Lee
- Translational Research Center for Protein
Function Control and Department of Materials
Science and Engineering, Yonsei University, Seoul 120-749, Korea
| | - Yong-beom Lim
- Translational Research Center for Protein
Function Control and Department of Materials
Science and Engineering, Yonsei University, Seoul 120-749, Korea
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17
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Stabilization of collagen-model, triple-helical peptides for in vitro and in vivo applications. Methods Mol Biol 2013; 1081:167-94. [PMID: 24014440 PMCID: PMC4260935 DOI: 10.1007/978-1-62703-652-8_11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The triple-helical structure of collagen has been accurately reproduced in numerous chemical and recombinant model systems. Triple-helical peptides and proteins have found application for dissecting collagen-stabilizing forces, isolating receptor- and protein-binding sites in collagen, mechanistic examination of collagenolytic proteases, and development of novel biomaterials. Introduction of native-like sequences into triple-helical constructs can reduce the thermal stability of the triple-helix to below that of the physiological environment. In turn, incorporation of nonnative amino acids and/or templates can enhance triple-helix stability. We presently describe approaches by which triple-helical structure can be modulated for use under physiological or near-physiological conditions.
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18
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Mazza M, Patel A, Pons R, Bussy C, Kostarelos K. Peptide nanofibres as molecular transporters: from self-assembly to in vivo degradation. Faraday Discuss 2013; 166:181-94. [DOI: 10.1039/c3fd00100h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Newcomb CJ, Moyer TJ, Lee SS, Stupp SI. Advances in cryogenic transmission electron microscopy for the characterization of dynamic self-assembling nanostructures. Curr Opin Colloid Interface Sci 2012. [PMID: 23204913 DOI: 10.1016/j.cocis.2012.09.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Elucidating the structural information of nanoscale materials in their solvent-exposed state is crucial, as a result, cryogenic transmission electron microscopy (cryo-TEM) has become an increasingly popular technique in the materials science, chemistry, and biology communities. Cryo-TEM provides a method to directly visualize the specimen structure in a solution-state through a thin film of vitrified solvent. This technique complements X-ray, neutron, and light scattering methods that probe the statistical average of all species present; furthermore, cryo-TEM can be used to observe changes in structure over time. In the area of self-assembly, this tool has been particularly powerful for the characterization of natural and synthetic small molecule assemblies, as well as hybrid organic-inorganic composites. In this review, we discuss recent advances in cryogenic TEM in the context of self-assembling systems with emphasis on characterization of transitions observed in response to external stimuli.
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Affiliation(s)
- Christina J Newcomb
- Department of Materials Science and Engineering Northwestern University, Evanston, IL, USA
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20
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Lin BF, Missirlis D, Krogstad DV, Tirrell M. Structural Effects and Lipid Membrane Interactions of the pH-Responsive GALA Peptide with Fatty Acid Acylation. Biochemistry 2012; 51:4658-68. [DOI: 10.1021/bi300314h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Brian F. Lin
- Department
of Bioengineering, University of California, Berkeley, California 94720,
United States
- Department
of Chemistry and
Biochemistry, University of California,
Santa Barbara, California 93106, United States
| | - Dimitris Missirlis
- Department
of Bioengineering, University of California, Berkeley, California 94720,
United States
- Department of Biophysical Chemistry,
Institute for Physical Chemistry, University of Heidelberg, Heidelberg, D-69210, Germany
| | - Daniel V. Krogstad
- Materials Department, University of California, Santa Barbara,
California 93106, United States
| | - Matthew Tirrell
- Department
of Bioengineering, University of California, Berkeley, California 94720,
United States
- Materials Department, University of California, Santa Barbara,
California 93106, United States
- Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United
States
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21
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Cavalli S, Robson Marsden H, Albericio F, Kros A. Peptide Self-Assembly. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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Pomerantz WC, Yuwono VM, Drake R, Hartgerink JD, Abbott NL, Gellman SH. Lyotropic Liquid Crystals Formed from ACHC-Rich β-Peptides. J Am Chem Soc 2011; 133:13604-13. [DOI: 10.1021/ja204874h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- William C. Pomerantz
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Virany M. Yuwono
- Department of Chemistry and Bioengineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Ryan Drake
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jeffrey D. Hartgerink
- Department of Chemistry and Bioengineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Nicholas L. Abbott
- Department of Chemical and Biological Engineering, University of Wisconsin−Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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23
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Kiagus-Armad R, Brizard A, Tang C, Blatchly R, Desbat B, Oda R. Cooperative and Reciprocal Chiral Structure Formation of an Alanine-Based Peptide Confined at the Surface of Cationic Surfactant Membranes. Chemistry 2011; 17:9999-10009. [DOI: 10.1002/chem.201100828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Indexed: 10/18/2022]
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24
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Ghasparian A, Riedel T, Koomullil J, Moehle K, Gorba C, Svergun DI, Perriman AW, Mann S, Tamborrini M, Pluschke G, Robinson JA. Engineered synthetic virus-like particles and their use in vaccine delivery. Chembiochem 2011; 12:100-9. [PMID: 21132689 DOI: 10.1002/cbic.201000536] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Engineered nanoparticles have been designed based on the self-assembling properties of synthetic coiled-coil lipopeptide building blocks. The presence of an isoleucine zipper within the lipopeptide together with the aggregating effects of an N-terminal lipid drives formation of 20-25 nm nanoparticles in solution. Biophysical studies support a model in which the lipid is buried in the centre of the nanoparticle, with 20-30 trimeric helical coiled-coil bundles radiating out into solution. A promiscuous T-helper epitope and a synthetic B-cell epitope mimetic derived from the circumsporozoite protein of Plasmodium falciparum have been linked to each lipopeptide chain, with the result that 60-90 copies of each antigen are displayed over the surface of the nanoparticle. These nanoparticles elicit strong humoral immune responses in mice and rabbits, including antibodies able to cross-react with the parasite, thereby, supporting the potential value of this delivery system in synthetic vaccine design.
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Affiliation(s)
- Arin Ghasparian
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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25
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Dube N, Presley AD, Shu JY, Xu T. Amphiphilic Peptide-Polymer Conjugates with Side-Conjugation. Macromol Rapid Commun 2011; 32:344-53. [DOI: 10.1002/marc.201000603] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/23/2010] [Indexed: 11/08/2022]
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26
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Dohm MT, Brown NJ, Seurynck-Servoss SL, de la Serna JB, Barron AE. Mimicking SP-C palmitoylation on a peptoid-based SP-B analogue markedly improves surface activity. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1663-78. [DOI: 10.1016/j.bbamem.2010.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2009] [Revised: 04/20/2010] [Accepted: 04/26/2010] [Indexed: 02/01/2023]
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27
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Shu JY, Huang YJ, Tan C, Presley AD, Chang J, Xu T. Amphiphilic Peptide−Polymer Conjugates Based on the Coiled-Coil Helix Bundle. Biomacromolecules 2010; 11:1443-52. [DOI: 10.1021/bm100009e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jessica Y. Shu
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Yu-Ja Huang
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Cen Tan
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Andrew D. Presley
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Joseph Chang
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Ting Xu
- Departments of Materials Science and Engineering and Chemistry, University of California, Berkeley, California 94720, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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28
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Missirlis D, Farine M, Kastantin M, Ananthanarayanan B, Neumann T, Tirrell M. Linker Chemistry Determines Secondary Structure of p5314−29 in Peptide Amphiphile Micelles. Bioconjug Chem 2010; 21:465-75. [DOI: 10.1021/bc900383m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Dimitris Missirlis
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
| | - Marc Farine
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
| | - Mark Kastantin
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
| | - Badriprasad Ananthanarayanan
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
| | - Thorsten Neumann
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
| | - Matthew Tirrell
- Department of Chemical Engineering and Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Bioengineering, University of California, Berkeley, California, 94720
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29
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Cavalli S, Albericio F, Kros A. Amphiphilic peptides and their cross-disciplinary role as building blocks for nanoscience. Chem Soc Rev 2010; 39:241-63. [DOI: 10.1039/b906701a] [Citation(s) in RCA: 219] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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30
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Banerjee J, Hanson AJ, Muhonen WW, Shabb JB, Mallik S. Microwave-assisted synthesis of triple-helical, collagen-mimetic lipopeptides. Nat Protoc 2009; 5:39-50. [PMID: 20057380 DOI: 10.1038/nprot.2009.195] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Collagen-mimetic peptides and lipopeptides are widely used as substrates for matrix degrading enzymes, as new biomaterials for tissue engineering, as drug delivery systems and so on. However, the preparation and subsequent purification of these peptides and their fatty-acid conjugates are really challenging. Herein, we report a rapid microwave-assisted, solid-phase synthetic protocol to prepare the fatty-acid conjugated, triple-helical peptides containing the cleavage site for the enzyme matrix metalloproteinase-9 (MMP-9). We employed a PEG-based resin as the solid support and the amino acids were protected with Fmoc- and tert-butyl groups. The amino acids were coupled at 50 degrees C (25 W of microwave power) for 5 min. The deprotection reactions were carried out at 75 degrees C (35 W of microwave power) for 3 min. Using this protocol, a peptide containing 23 amino acids was synthesized and then conjugated to stearic acid in 14 h.
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Affiliation(s)
- Jayati Banerjee
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, North Dakota, USA
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31
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Aulisa L, Forraz N, McGuckin C, Hartgerink JD. Inhibition of cancer cell proliferation by designed peptide amphiphiles. Acta Biomater 2009; 5:842-53. [PMID: 19249722 DOI: 10.1016/j.actbio.2008.11.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 11/05/2008] [Accepted: 11/06/2008] [Indexed: 12/27/2022]
Abstract
HOX genes encode conserved transcription factors that control the morphological diversification along the anteroposterior body axis. HOX proteins bind to DNA through a highly conserved 60 amino acid sequence called the homeodomain, and greater DNA binding specificity and stability are achieved when it forms complexes with cofactors such as PBX and MEIS in humans. In particular, HOX proteins from paralog groups 1-8, interact with PBX proteins via a specific and highly conserved hydrophobic six amino acid sequence localized in the N-terminal region of HOX. In several oncogenic transformations, deregulated HOX gene expression has been observed, indicating an involvement of these transcriptional regulators in carcinogenesis and metastasis. Inhibition of the HOX-PBX interaction could be a strategy to control the abnormal proliferation of these cancer cells. In this study we describe a small designed peptide amphiphile (PA) which self-assembles into micelles and shows inhibition of T3M4 pancreatic cancer cells, K562 leukemia cells and MJT1 melanoma cells while non-cancerous fibroblast NIH 3T3 cells are less affected. This molecule contains three critical regions: a 9-amino-acid sequence designed to disrupt HOX/PBX/DNA complex formation, a 16-amino-acid sequence to deliver the peptide into the cell and a 16-carbon-acyl chain which we show leads to the molecule's self-assembly and significantly enhances the effectiveness of the molecule to slow cell proliferation.
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Affiliation(s)
- Lorenzo Aulisa
- Department of Chemistry, Rice University, Houston, TX 77005, USA
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32
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Application of topologically constrained mini-proteins as ligands, substrates, and inhibitors. Methods Mol Biol 2008; 386:125-66. [PMID: 18604945 DOI: 10.1007/978-1-59745-430-8_5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
Protein-protein interactions are governed by a variety of structural features. The sequence specificities of such interactions are usually easier to establish than the "topological specificities," whereby interactions may be classified based on recognition of distinct three-dimensional structural motifs. Approaches to explore topological specificities have been based primarily on assembly of mini-proteins with well defined secondary, tertiary, and/or quarternary structures. The present chapter focuses on three approaches for constructing topologically well defined mini-proteins: template-assembled synthetic proteins (TASPs), disulfide-stabilized structures, and peptide-amphiphiles (PAs). Specific examples are given for applying each approach to explore topologically-dependent protein-protein interactions. TASPs are utilized to identify a metastatic melanoma receptor that binds to the alpha1(IV)1263-1277 region of basement membrane (type IV) collagen. A disulfide-stabilized structure incorporating a sarafotoxin (SRT) 6b model was examined as a matrix metalloproteinase (MMP)-3 inhibitor. PAs were developed as (a) fluorogenic triple-helical or polyPro II substrates for MMPs and aggrecanase members of the a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) family and (b) glycosylated and nonglycosylated ligands for metastatic melanoma cells. Topologically constrained mini-proteins have proved to be quite versatile, helping to define critical primary, secondary, and tertiary structural elements that modulate enzyme and receptor functions.
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33
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Rezler EM, Khan DR, Tu R, Tirrell M, Fields GB. Peptide-mediated targeting of liposomes to tumor cells. Methods Mol Biol 2008; 386:269-98. [PMID: 18604950 DOI: 10.1007/978-1-59745-430-8_10] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
One of the biggest obstacles for efficient drug delivery is specific cellular targeting. Liposomes have long been used for drug delivery, but do not possess targeting capabilities. This limitation may be circumvented by surface coating of colloidal delivery systems with peptides, proteins, carbohydrates, vitamins, or antibodies that target cell surface receptors or other biomolecules. Each of these coatings has significant drawbacks. One idealized system for drug delivery combines stabilized "protein module" ligands with a colloidal delivery vehicle. Prior studies have shown that peptide-amphiphiles, whereby both a peptide "head group" and a lipid-like "tail" are present in the same molecule, can be used to engineer collagen-like triple-helical or alpha-helical miniproteins. The tails serve to stabilize the head group structural elements. These peptide-amphiphiles can be designed to bind to specific cell surface receptors with high affinity. Structural stabilization of the integrated targeting ligand in the peptide-amphiphile system equates to prolonged in vivo stability through resistance to proteolytic degradation. Liposomes have been prepared incorporating a melanoma targeting peptide-amphiphile ligand, and shown to be stable with retention of peptide-amphiphile triple-helical structure. Encapsulated fluorescent dyes are selectively delivered to cells. In this chapter we describe the methods and techniques employed in the preparation and characterization of peptide-amphiphiles and peptide-amphiphile-targeted large and small unilamellar vesicles (LUVs and SUVs). Fluorescence microscopy is subsequently utilized to examine the targeting capabilities of peptide-amphiphile LUVs, which should allow for improved drug selectivity towards melanoma vs normal cells based on differences in the relative abundance of the targeted cell surface receptors.
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Affiliation(s)
- Evonne M Rezler
- Department of Chemistry & Biochemistry, Florida Atlantic University, Boca Raton, USA
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34
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Rezler EM, Khan DR, Lauer-Fields J, Cudic M, Baronas-Lowell D, Fields GB. Targeted drug delivery utilizing protein-like molecular architecture. J Am Chem Soc 2007; 129:4961-72. [PMID: 17397150 PMCID: PMC2519954 DOI: 10.1021/ja066929m] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Nanotechnology-based drug delivery systems (nanoDDSs) have seen recent popularity due to their favorable physical, chemical, and biological properties, and great efforts have been made to target nanoDDSs to specific cellular receptors. CD44/chondroitin sulfate proteoglycan (CSPG) is among the receptors overexpressed in metastatic melanoma, and the sequence to which it binds within the type IV collagen triple-helix has been identified. A triple-helical "peptide-amphiphile" (alpha1(IV)1263-1277 PA), which binds CD44/CSPG, has been constructed and incorporated into liposomes of differing lipid compositions. Liposomes containing distearoyl phosphatidylcholine (DSPC) as the major bilayer component, in combination with distearoyl phosphatidylglycerol (DSPG) and cholesterol, were more stable than analogous liposomes containing dipalmitoyl phosphatidylcholine (DPPC) instead of DSPC. When dilauroyl phosphatidylcholine (DLPC):DSPG:cholesterol liposomes were prepared, monotectic behavior was observed. The presence of the alpha1(IV)1263-1277 PA conferred greater stability to the DPPC liposomal systems and did not affect the stability of the DSPC liposomes. A positive correlation was observed for cellular fluorophore delivery by the alpha1(IV)1263-1277 PA liposomes and CD44/CSPG receptor content in metastatic melanoma and fibroblast cell lines. Conversely, nontargeted liposomes delivered minimal fluorophore to these cells regardless of the CD44/CSPG receptor content. When metastatic melanoma cells and fibroblasts were treated with exogeneous alpha1(IV)1263-1277, prior to incubation with alpha1(IV)1263-1277 PA liposomes, to potentially disrupt receptor/liposome interactions, a dose-dependent decrease in the amount of fluorophore delivered was observed. Overall, our results suggest that PA-targeted liposomes can be constructed and rationally fine-tuned for drug delivery applications based on lipid composition. The selectivity of alpha1(IV)1263-1277 PA liposomes for CD44/CSPG-containing cells represents a targeted-nanoDDS with potential for further development and application.
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Affiliation(s)
- Evonne M Rezler
- Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Road, Boca Raton, Florida 33431, USA
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35
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Meijer JT, Roeters M, Viola V, Löwik DWPM, Vriend G, van Hest JCM. Stabilization of peptide fibrils by hydrophobic interaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:2058-63. [PMID: 17279695 DOI: 10.1021/la0625345] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Hydrophobic interactions play an important role in assembly processes in aqueous environments. In case of peptide amphiphiles, hydrophobicity is combined with hydrogen bonding to yield well-defined peptide-based aggregates. Here, we report a systematic study after the role of hydrophobic interactions on both stabilization and morphology of a peptide fibrillar assembly. For this purpose, alkyl tails were connected to a known beta-sheet forming peptide with the sequence KTVIIE. The introduction of n-alkyl groups induced thermal stability to the assemblies without affecting the morphology of the peptide aggregates.
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Affiliation(s)
- Joris T Meijer
- Organic Chemistry, Institute for Molecules and Materials and Center for Molecular and Biomolecular Informatics, NCMLS, Radboud University Nijmegen, Toernooiveld 1- Huygens Building 03.016, 6525 ED Nijmegen, The Netherlands
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36
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Brizard A, Ahmad RK, Oda R. Control of nano-micrometric twist and helical ribbon formation with gemini–oligoalanine via interpeptidic β-sheet structure formation. Chem Commun (Camb) 2007:2275-7. [PMID: 17534515 DOI: 10.1039/b700959c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Confinement of anionic oligo-alanine peptides at the surfaces of cationic membrane by ionic interaction can induce their secondary structure formation; such organized peptides reciprocally transfer their chirality to membranes with non-chiral amphiphiles and their supramolecular chiral structures can be tuned both by peptides and amphiphiles structures.
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Affiliation(s)
- Aurélie Brizard
- Institut Européen de Chimie et Biologie, 2, Rue Robert Escarpit, Pessac, 33607, France
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37
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Lauer-Fields JL, Minond D, Sritharan T, Kashiwagi M, Nagase H, Fields GB. Substrate Conformation Modulates Aggrecanase (ADAMTS-4) Affinity and Sequence Specificity. J Biol Chem 2007; 282:142-50. [PMID: 17095512 DOI: 10.1074/jbc.m605236200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Protease-substrate interactions are governed by a variety of structural features. Although the substrate sequence specificities of numerous proteases have been established, "topological specificities," whereby proteases may be classified based on recognition of distinct three-dimensional structural motifs, have not. The aggrecanase members of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) family cleave a variety of proteins but do not seem to possess distinct sequence specificities. In the present study, the topological substrate specificity of ADAMTS-4 (aggrecanase-1) was examined using triple-helical or single-stranded poly(Pro) II helical peptides. Substrate topology modulated the affinity and sequence specificity of ADAMTS-4 with K(m) values indicating a preference for triple-helical structure. In turn, non-catalytic ADAMTS-4 domains were critical for hydrolysis of triple-helical and poly(Pro) II helical substrates. Comparison of ADAMTS-4 with MMP-1 (collagenase 1), MMP-13 (collagenase 3), trypsin, and thermolysin using triple-helical peptide (THP) and single-stranded peptide (SSP) substrates demonstrated that all five proteases possessed efficient "triple-helical peptidase" activity and fell into one of two categories: (k(cat)/K(m))(SSP) > (k(cat)/K(m))(THP) (thermolysin, trypsin, and MMP-13) or (k(cat)/K(m))(THP) > or = (k(cat)/K(m))(SSP) and (K(m))(SSP) > (K(m))(THP) (MMP-1 and ADAMTS-4). Overall these results suggest that topological specificity may be a guiding principle for protease behavior and can be utilized to design specific substrates and inhibitors. The triple-helical and single-stranded poly(Pro) II helical peptides represent the first synthetic substrates successfully designed for aggrecanases.
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Affiliation(s)
- Janelle L Lauer-Fields
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, USA
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38
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Kokkoli E, Mardilovich A, Wedekind A, Rexeisen EL, Garg A, Craig JA. Self-assembly and applications of biomimetic and bioactive peptide-amphiphiles. SOFT MATTER 2006; 2:1015-1024. [PMID: 32680204 DOI: 10.1039/b608929a] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Peptide-amphiphiles are amphiphilic structures with a hydrophilic peptide headgroup that incorporates a bioactive sequence and has the potential to form distinct structures, and a hydrophobic tail that serves to align the headgroup, drive self-assembly, and induce secondary and tertiary conformations. In this paper we review the different self-assembled structures of peptide-amphiphiles that range from micelles and nanofibers, to patterned membranes. We also describe several examples where peptide-amphiphiles have found applications as soft bioactive materials for model studies of bioadhesion and characterization of different cellular phenomena, as well as scaffolds for tissue engineering, regenerative medicine, and targeted drug delivery.
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Affiliation(s)
- Efrosini Kokkoli
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Anastasia Mardilovich
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Alison Wedekind
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Emilie L Rexeisen
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Ashish Garg
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Jennifer A Craig
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
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39
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Brizard A, Dolain C, Huc I, Oda R. Asp-Gly based peptides confined at the surface of cationic gemini surfactant aggregates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:3591-600. [PMID: 16584231 DOI: 10.1021/la053516a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Cationic gemini surfactants complexed with anionic oligoglycine-aspartate (called gemini peptides hereafter) were synthesized, and their aggregation behaviors were studied. The effects of the hydrophobic chain length (C10-C22) and the length of the oligoglycine (0-4) were investigated, and it was clearly shown by critical micellar concentration, Krafft temperature, and isothermal surface pressure measurements that the hydrophobic effect and interpeptidic interaction influence the aggregation behavior in a cooperative manner. Below their Krafft temperatures, some of them formed both hydro- and organogels with three-dimensional networks and the Fourier transform infrared measurements show the presence of interpeptidic hydrogen bonds.
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Affiliation(s)
- Aurélie Brizard
- Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac Cedex, France
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40
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Elgersma RC, Meijneke T, de Jong R, Brouwer AJ, Posthuma G, Rijkers DTS, Liskamp RMJ. Synthesis and structural investigations of N-alkylated β-peptidosulfonamide–peptide hybrids of the amyloidogenic amylin(20–29) sequence: implications of supramolecular folding for the design of peptide-based bionanomaterials. Org Biomol Chem 2006; 4:3587-97. [PMID: 16990934 DOI: 10.1039/b606875h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The incorporation of a single beta-aminoethane sulfonyl amide moiety in a highly amyloidogenic peptide sequence resulted in a complete loss of amyloid fibril formation. Instead, supramolecular folding morphologies were observed. Subsequent chemoselective N-alkylation of the sulfonamide resulted in amphiphilic peptide-based hydrogelators. It was found that variation of merely the alkyl chain induced a dramatic variation in aggregation motifs such as helical ribbons and tapes, ribbons progressing to closed tubes, twisted lamellar sheets and entangled/branched fibers.
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Affiliation(s)
- Ronald C Elgersma
- Department of Medicinal Chemistry and Chemical Biology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, PO Box 80082, 3508 TB, Utrecht, The Netherlands
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41
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Bitton R, Schmidt J, Biesalski M, Tu R, Tirrell M, Bianco-Peled H. Self-assembly of model DNA-binding peptide amphiphiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:11888-95. [PMID: 16316129 DOI: 10.1021/la051811p] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Peptide amphiphiles combine the specific functionality of proteins with the engineering convenience of synthetic amphiphiles. These molecules covalently link a peptide headgroup, typically from an active fragment of a larger protein, to a hydrophobic alkyl tail. Our research is aimed at forming and characterizing covalently stabilized, self-assembled, peptide-amphiphile aggregates that can be used as a platform for the examination and modular design and construction of systems with engineering biological activity. We have studied the self-assembly properties of a model DNA-binding amphiphile, having a GCN4 peptide as the headgroup and containing a polymerizable methacrylic group in the tail region, using a combination of small-angle X-ray scattering, small-angle neutron scattering, and cryo- transmission electron microscopy. Our results reveal a variety of morphologies in this system. The peptide amphiphiles assembled in aqueous solution to helical ribbons and tubules. These structures transformed into lamella upon DNA binding. In contrast with common surfactants, the specific interaction between the headgroups seems to play an important role in determining the microstructure. The geometry of the self-assembled aggregate can be controlled by means of adding a cosurfactant. For example, the addition of SDS induced the formation of spherical micelles.
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Affiliation(s)
- Ronit Bitton
- Inter-Departmental Program for Biotechnology and Department of Chemical Engineering, Technion-Israel Institute of Technology
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42
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Sarkar NR, Rosendahl T, Krueger AB, Banerjee AL, Benton K, Mallik S, Srivastava DK. "Uncorking" of liposomes by matrix metalloproteinase-9. Chem Commun (Camb) 2005:999-1001. [PMID: 15719095 DOI: 10.1039/b416827e] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A triggered release methodology of liposomal contents via the enzyme MMP-9 is described.
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Affiliation(s)
- Nihar R Sarkar
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, USA.
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43
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Affiliation(s)
- Dennis W P M Löwik
- Department of Organic Chemistry, University of Nijmegen, Toernooiveld 1-U177, 6525 ED Nijmegen, The Netherlands.
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Baronas-Lowell D, Lauer-Fields JL, Fields GB. Induction of Endothelial Cell Activation by a Triple Helical α2β1 Integrin Ligand, Derived from Type I Collagen α1(I)496–507. J Biol Chem 2004; 279:952-62. [PMID: 14581484 DOI: 10.1074/jbc.m305989200] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Endothelial cell activation involves the elevated expression of cell adhesion molecules, chemoattractants, chemokines, and cytokines. These expression profiles may be regulated by integrin-mediated cell signaling pathways. In the current study, an alpha2beta1 integrin triple helical peptide ligand derived from type I collagen residues alpha1(I)496-507 was examined for induction of human aortic endothelial cell (HAEC) activation. In addition, a "miniextracellular matrix" composed of a mixture of the alpha1(I)496-507 ligand and a second, alpha-helical ligand incorporating the endothelial cell proliferating region of SPARC (secreted protein acidic and rich in cysteine) was studied for induction of HAEC activation. Following HAEC adhesion to alpha1(I)496-507, mRNA expression of E-selectin-1, vascular and intercellular cell adhesion molecules-1, and monocytic chemoattractant protein-1 was stimulated, whereas that of endothelin-1 was inhibited. Enzyme-linked immunosorbent assay analysis demonstrated that E-selectin-1 and monocytic chemoattractant protein-1 expression was also stimulated, whereas endothelin-1 protein expression diminished. Engagement of the alpha2beta1 integrin initiated a HAEC response similar to that of tumor necrosis factor-alpha-induced HAECs but was not sufficient to induce an inflammatory response. Addition of the SPARC119-122 region had only a slight effect on HAEC activation. Other cell-extracellular matrix interactions appear to be required to elicit an inflammatory response. The alpha2beta1 integrin specific triple helical peptide ligand described herein represents a more general in vitro model system by which gene expression and protein production profiles induced by binding to a single cellular receptor type can be quantified.
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Affiliation(s)
- Diane Baronas-Lowell
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, USA
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45
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Lauer-Fields JL, Kele P, Sui G, Nagase H, Leblanc RM, Fields GB. Analysis of matrix metalloproteinase triple-helical peptidase activity with substrates incorporating fluorogenic L- or D-amino acids. Anal Biochem 2003; 321:105-15. [PMID: 12963061 DOI: 10.1016/s0003-2697(03)00460-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The consequences of improper regulation of collagen turnover include diseases such as tumor cell metastasis and arthritis. Several fluorogenic triple-helical peptide (fTHP) substrates have been constructed presently to examine collagenolytic behavior. These substrates incorporate L- or D-2-amino-3-(7-methoxy-4-coumaryl)propionic acid (Amp) or L- or D-2-amino-3-(6,7-dimethoxy-4-coumaryl)propionic acid (Adp) as the fluorophore and N-2,4-dinitrophenyl (Dnp) as the quencher. The desired sequences were C6-(Gly-Pro-Hyp)5-Gly-Pro-[Amp/Adp]-Gly-Pro-Gln-Gly approximately Leu-Arg-Gly-Gln-Lys(Dnp)-Gly-Val-Arg-(Gly-Pro-Hyp)5-NH2. All four fTHPs formed stable triple-helices. Matrix metalloproteinase-2 (MMP-2) rates of hydrolysis for all fTHPs were considerably more rapid than corresponding MMP-1 rates. Evaluation of individual kinetic parameters indicated that MMP-2 bound to the fTHPs more efficiently than MMP-1. Comparison to a triple-helical substrate incorporating the same sequence but with a different fluorophore [Lys((7-methoxycoumarin-4-yl)acetyl); Lys(Mca)] demonstrated that the shorter side chain of Amp or Adp was better tolerated by MMP-1 and MMP-2. Adp may well be the fluorophore of choice for fTHPs, as (a) fTHPs incorporating Adp were obtained in significantly higher yields than the Amp-containing fTHPs, (b) Adp has a larger Stokes shift than either Amp or Lys(Mca) and thus has less chance of self-quenching, (c) Adp has a relatively high quantum yield, (d) the Adp/Dnp pair is compatible with multiwell plate reader formats, and (e) MMPs better tolerate Adp than Lys(Mca).
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Affiliation(s)
- Janelle L Lauer-Fields
- Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431-0991, USA
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46
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Lockwood NA, Tu RS, Zhang Z, Tirrell MV, Thomas DD, Karim CB. Structure and function of integral membrane protein domains resolved by peptide-amphiphiles: application to phospholamban. Biopolymers 2003; 69:283-92. [PMID: 12833255 DOI: 10.1002/bip.10365] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We have used synthetic lipidated peptides ("peptide-amphiphiles") to study the structure and function of isolated domains of integral transmembrane proteins. We used 9-fluorenylmethyloxycarbonyl (Fmoc) solid-phase peptide synthesis to prepare full-length phospholamban (PLB(1-52)) and its cytoplasmic (PLB(1-25)K: phospholamban residues 1-25 plus a C-terminal lysine), and transmembrane (PLB(26-52)) domains, and a 38-residue model alpha-helical sequence as a control. We created peptide-amphiphiles by linking the C-terminus of either the isolated cytoplasmic domain or the model peptide to a membrane-anchoring, lipid-like hydrocarbon tail. Circular dichroism measurements showed that the model peptide-amphiphile, either in aqueous suspension or in lipid bilayers, had a higher degree of alpha-helical secondary structure than the unlipidated model peptide. We hypothesized that the peptide-amphiphile system would allow us to study the function and structure of the PLB(1-25)K cytoplasmic domain in a native-like configuration. We compared the function (inhibition of the Ca-ATPase in reconstituted membranes) and structure (via CD) of the PLB(1-25) amphiphile to that of PLB and its isolated transmembrane and cytoplasmic domains. Our results indicate that the cytoplasmic domain PLB(1-25)K has no effect on Ca-ATPase (calcium pump) activity, even when tethered to the membrane in a manner mimicking its native configuration, and that the transmembrane domain of PLB is sufficient for inhibition of the Ca-ATPase.
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Affiliation(s)
- Nathan A Lockwood
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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47
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Malkar NB, Lauer-Fields JL, Juska D, Fields GB. Characterization of peptide-amphiphiles possessing cellular activation sequences. Biomacromolecules 2003; 4:518-28. [PMID: 12741765 DOI: 10.1021/bm0256597] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Numerous approaches have been described for modifying biomaterials to incorporate extracellular matrix components. "Peptide-amphiphiles", whereby monoalkyl hydrocarbon chains are covalently linked to peptide sequences, have been shown previously to (a) form specific molecular architecture with enhanced stability and (b) promote cell adhesion, spreading, and signaling. The present study has examined the use of chimeric peptide-amphiphiles for inducing protein-like structures and peptide-amphiphile mixtures for enhancing surface bioactivity. The alpha-helical propensity of a 21 residue peptide, incorporating the SPARC(119-122) angiogenesis-inducing sequence and either unmodified or acylated with a C(6), C(10), C(14), C(16), C(18), C(18:1), or C(18:1-OH) monoalkyl hydrocarbon chain, has been examined. Peptide and peptide-amphiphile structures were characterized by circular dichroism and one- and two-dimensional NMR spectroscopic techniques. The 21 residue peptide alone does not form a distinct structure in solution, whereas N-terminal acylation by monoalkyl hydrocarbon chains results in the 21 residue peptide-amphiphile adopting a predominantly alpha-helical structure in solution. The thermal stability of the alpha-helix increases with increasing hydrocarbon chain length. The SPARC(119-122) peptide-amphiphiles were then screened for promotion of endothelial cell adhesion and spreading. The greatest activity was achieved by using a mixture of the alpha-helical SPARC(119-122) peptide-amphiphile, a triple-helical peptide-amphiphile incorporating the alpha2beta1 integrin binding site from type I collagen, and a pseudolipid. The pseudolipid is most likely required for a spatial distribution of the peptide-amphiphiles that allows for optimal cellular interactions. Overall, we have found that incorporation of bioactive sequences within peptide-amphiphiles results in the induction of an ordered structure of the bioactive sequence and that mixtures of peptide-amphiphiles can be used to promote endothelial cell behaviors comparable to extracellular matrix components.
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Affiliation(s)
- Navdeep B Malkar
- Department of Chemistry & Biochemistry, Florida Atlantic University, 777 Glades Road, Boca Raton, Florida 33431-0991, USA
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48
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Lauer-Fields JL, Malkar NB, Richet G, Drauz K, Fields GB. Melanoma cell CD44 interaction with the alpha 1(IV)1263-1277 region from basement membrane collagen is modulated by ligand glycosylation. J Biol Chem 2003; 278:14321-30. [PMID: 12574156 DOI: 10.1074/jbc.m212246200] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Invasion of the basement membrane is believed to be a critical step in the metastatic process. Melanoma cells have been shown previously to bind distinct triple-helical regions within basement membrane (type IV) collagen. Additionally, tumor cell binding sites within type IV collagen contain glycosylated hydroxylysine residues. In the present study, we have utilized triple-helical models of the type IV collagen alpha1(IV)1263-1277 sequence to (a) determine the melanoma cell receptor for this ligand and (b) analyze the results of single-site glycosylation on melanoma cell recognition. Receptor identification was achieved by a combination of methods, including (a) cell adhesion and spreading assays using triple-helical alpha1(IV)1263-1277 and an Asp(1266)Abu variant, (b) inhibition of cell adhesion and spreading assays, and (c) triple-helical alpha1(IV)1263-1277 affinity chromatography with whole cell lysates and glycosaminoglycans. Triple-helical alpha1(IV)1263-1277 was bound by melanoma cell CD44/chondroitin sulfate proteoglycan receptors and not by the collagen-binding integrins or melanoma-associated proteoglycan. Melanoma cell adhesion to and spreading on the triple-helical alpha1(IV)1263-1277 sequence was then compared for glycosylated (replacement of Lys(1265) with Hyl(O-beta-d-galactopyranosyl)) versus non-glycosylated ligand. Glycosylation was found to strongly modulate both activities, as adhesion and spreading were dramatically decreased due to the presence of galactose. CD44/chondroitin sulfate proteoglycan did not bind to glycosylated alpha1(IV)1263-1277. Overall, this study (a) is the first demonstration of the prophylactic effects of glycosylation on tumor cell interaction with the basement membrane, (b) provides a rare example of an apparent unfavorable interaction between carbohydrates, and (c) suggests that sugars may mask "cryptic sites" accessible to tumor cells with cell surface or secreted glycosidase activities.
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Affiliation(s)
- Janelle L Lauer-Fields
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton 33431-0991, USA
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