51
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Kojima C, Irie K, Tada T, Tanaka N. Temperature-sensitive elastin-mimetic dendrimers: Effect of peptide length and dendrimer generation to temperature sensitivity. Biopolymers 2014; 101:603-12. [DOI: 10.1002/bip.22425] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 09/26/2013] [Accepted: 10/08/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Chie Kojima
- Nanoscience and Nanotechnology Research Center; Research Organization for the 21st Century, Osaka Prefecture University; 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570 Japan
| | - Kotaro Irie
- Department of Physical Science; Graduate School of Science; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531 Japan
| | - Tomoko Tada
- Department of Bio-molecular Engineering; Kyoto Institute of Technology, Gosyokaido-cho, Matsugasaki; Sakyo-ku Kyoto 606-8585 Japan
| | - Naoki Tanaka
- Department of Bio-molecular Engineering; Kyoto Institute of Technology, Gosyokaido-cho, Matsugasaki; Sakyo-ku Kyoto 606-8585 Japan
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52
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Movileanu L. Watching single proteins using engineered nanopores. Protein Pept Lett 2014; 21:235-46. [PMID: 24370252 PMCID: PMC3924890 DOI: 10.2174/09298665113209990078] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2012] [Revised: 11/03/2012] [Accepted: 11/10/2012] [Indexed: 12/22/2022]
Abstract
Recent studies in the area of single-molecule detection of proteins with nanopores show a great promise in fundamental science, bionanotechnology and proteomics. In this mini-review, I discuss a comprehensive array of examinations of protein detection and characterization using protein and solid-state nanopores. These investigations demonstrate the power of the single-molecule nanopore measurements to reveal a broad range of functional, structural, biochemical and biophysical features of proteins, such as their backbone flexibility, enzymatic activity, binding affinity as well as their concentration, size and folding state. Engineered nanopores in organic materials and in inorganic membranes coupled with surface modification and protein engineering might provide a new generation of sensing devices for molecular biomedical diagnostics.
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Affiliation(s)
- Liviu Movileanu
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA.
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53
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Kakinoki S, Yamaoka T. Thermoresponsive elastin/laminin mimicking artificial protein for modifying PLLA scaffolds in nerve regeneration. J Mater Chem B 2014; 2:5061-5067. [DOI: 10.1039/c4tb00305e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly(l-lactic acid) (PLLA) is widely used as a scaffold but does not possess biological functions.
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Affiliation(s)
- Sachiro Kakinoki
- Department of Biomedical Engineering
- National Cerebral and Cardiovascular Center Research Institute
- Suita, Japan
- JST
- CREST
| | - Tetsuji Yamaoka
- Department of Biomedical Engineering
- National Cerebral and Cardiovascular Center Research Institute
- Suita, Japan
- JST
- CREST
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54
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Janib SM, Pastuszka M, Aluri S, Folchman-Wagner Z, Hsueh PY, Shi P, Yi-An, Cui H, Mackay JA. A quantitative recipe for engineering protein polymer nanoparticles. Polym Chem 2014; 5:1614-1625. [PMID: 24511327 DOI: 10.1039/c3py00537b] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Protein polymers can assemble switchable nanostructures with emerging applications as biomaterials and nanomedicines. For example, above a critical micelle temperature (CMT) some elastin-like polypeptide (ELP) diblock copolymers assemble spherical nanoparticles, which may modulate cellular internalization and in vivo biodistribution. To achieve engineering-level control over their properties, this report explores a comprehensive library of ELP monoblock and diblock polymers. For the first time, we report that a surprisingly high core molecular weight is required for stable nanoparticle formation; furthermore, nanoparticle size depends on polymer molecular weight. A mathematical model was developed to characterize four ELP monoblock libraries and to predict the phase behavior of corresponding diblock copolymers. The CMT was almost entirely dependent on the hydrophobic core ELP, while the bulk phase transition temperature (Tt,bulk ) depends predominantly on the hydrophilic block. Nanoparticle assembly was accompanied by a conversion in secondary structure of the hydrophobic block from random coil and beta-sheets to type-2 β turns. For the first time, this report enables the rational design of ELP protein polymer nanoparticles with physico-chemico properties that will be suitable for biological applications.
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Affiliation(s)
- S Mohd Janib
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - M Pastuszka
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - S Aluri
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - Z Folchman-Wagner
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - P-Y Hsueh
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - P Shi
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
| | - Yi-An
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University Baltimore, MD 21218 USA
| | - H Cui
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University Baltimore, MD 21218 USA
| | - J A Mackay
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA; 90033-9121
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55
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Structural and hydrodynamic analysis of a novel drug delivery vector: ELP[V5G3A2-150]. Biophys J 2013; 104:2009-21. [PMID: 23663844 DOI: 10.1016/j.bpj.2013.03.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 02/28/2013] [Accepted: 03/12/2013] [Indexed: 11/21/2022] Open
Abstract
The therapeutic potential of elastin-like polypeptide (ELP) conjugated to therapeutic compounds is currently being investigated as an approach to target drugs to solid tumors. ELPs are hydrophobic polymers that are soluble at low temperatures and cooperatively aggregate above a transition temperature (TT), allowing for thermal targeting of covalently attached drugs. They have been shown to cooperatively transition from a disordered structure to a repeating type II β-turn structure, forming a β-spiral above the TT. Here we present biophysical measurements of the structural, thermodynamic, and hydrodynamic properties of a specific ELP being investigated for drug delivery, ELP[V5G3A2-150]. We examine the biophysical properties below and above the TT to understand and predict the therapeutic potential of ELP-drug conjugates. We observed that below the TT, ELP[V5G3A2-150] is soluble, with an extended conformation consisting of both random coil and heterogeneous β structures. Sedimentation velocity experiments indicate that ELP[V5G3A2-150] undergoes weak self-association with increasing temperature, and above the TT the hydrophobic effect drives aggregation entropically. These experiments also reveal a previously unreported temperature-dependent critical concentration (Cc) that resembles a solubility constant. Labeling ELP[V5G3A2-150] with fluorescein lowers the TT by 3.5°C at 20 μM, whereas ELP[V5G3A2-150] dissolution in physiological media (fetal bovine serum) increases the TT by ∼2.2°C.
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56
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A designed, phase changing RTX-based peptide for efficient bioseparations. Biotechniques 2013; 54:197-8, 200, 202, 204, 206. [PMID: 23581466 DOI: 10.2144/000114010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 03/13/2013] [Indexed: 11/23/2022] Open
Abstract
Typically, chromatography is the most costly and time-consuming step in protein purification. As a result, alternative methods have been sought for bioseparations, including the use of stimulus-responsive tags that can reversibly precipitate out of solution in response to the appropriate stimulus. While effective, stimulus-responsive tags tend to require temperature changes or relatively harsh buffer conditions to induce precipitation. Here we describe a synthetic peptide, based on the natural repeat-in-toxin (RTX) domain that undergoes gentler calcium-responsive, reversible precipitation. When coupled to the maltose binding protein (MBP), our calcium-responsive tag efficiently purified the fusion protein. Furthermore, when the MBP was appended to green fluorescent protein (GFP), β-lactamase, or a thermostable alcohol dehydrogenase (AdhD), these constructs could also be purified by calcium-induced precipitation. Finally, protease cleavage of the precipitating tag enables the recovery of pure and active target protein by cycling precipitation before and after cleavage.
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57
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Kurzbach D, Hassouneh W, McDaniel JR, Jaumann EA, Chilkoti A, Hinderberger D. Hydration layer coupling and cooperativity in phase behavior of stimulus responsive peptide polymers. J Am Chem Soc 2013; 135:11299-308. [PMID: 23822733 PMCID: PMC4167343 DOI: 10.1021/ja4047872] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It is shown that hydrophilic (backbone) and hydrophobic (side chain) hydration layers of elastin-like polypeptides (ELPs), a class of stimulus responsive peptide polymers that exhibit lower critical solution temperature (LCST) phase transition behavior, can exist in a coupled and decoupled state. The decoupled hydration state consists of hydrophobic and hydrophilic hydration layers that respond independently to temperature, while the coupled hydration state is characterized by a common, cooperative dehydration of both hydration layers. It is further shown that the primary sequence of an ELP can be tuned to exhibit either of the hydration layer coupling modes. Charged side chains lead to decoupling, while strongly hydrophobic side chains trigger stronger interaction between hydrophilic and hydrophobic hydration, leading to coupling of both layers. Further, for aprotic residues this coupling is fostered by decreasing bulkiness of hydrophobic side chains due to larger hydration numbers and water molecules mediating coupling between side chain and backbone hydration shells. For coupled hydration shells, the LCST phase transition characterized by spin probing continuous wave electron paramagnetic resonance spectroscopy is reminiscent of a first-order process even on nanoscopic length scales. In contrast, analogous synthetic polymers exhibit nanoscale phase transitions over a broad temperature range, indicating that their nanoscale phase behavior is not of first order. Hence, our results indicate that ELPs are the first identified class of polymers that exhibit a first-order inverse phase transition on nanoscopic length scales. These results may also provide insights into the role of hydration layers in governing the structure-function relationship of intrinsically disordered proteins.
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Affiliation(s)
- Dennis Kurzbach
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Wafa Hassouneh
- Department of Biomedical Engineering, Duke University, 136 Hudson Hall, Box 90281, Durham, NC 27708-0281, USA
| | - Jonathan R. McDaniel
- Department of Biomedical Engineering, Duke University, 136 Hudson Hall, Box 90281, Durham, NC 27708-0281, USA
| | - Eva A. Jaumann
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, 136 Hudson Hall, Box 90281, Durham, NC 27708-0281, USA
| | - Dariush Hinderberger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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58
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Soon ASC, Smith MH, Herman ES, Lyon LA, Barker TH. Development of self-assembling mixed protein micelles with temperature-modulated avidities. Adv Healthc Mater 2013; 2:1045-55. [PMID: 23441099 DOI: 10.1002/adhm.201200330] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Indexed: 11/07/2022]
Abstract
Elastin-like polypeptides (ELPs) are polypentapeptides that undergo hydrophobic collapse and aggregation above a specific transition temperature, Tt . ELP diblocks sharing a common "core" block (I60) but varying "outer" blocks (A80, P40) were designed, where Tt,I < Tt,A < Tt,P . The formation of ∼55 nm diameter mixed micelles from these ELP diblocks was verified using dynamic light scattering (DLS), multiangle light scattering (MALS) and fluorescence resonance energy transfer (FRET). To confer affinity to the blood circulating protein fibrinogen, a fibrinogen-binding tetrapeptide sequence (GPRP) was fused to A80-I60, while P40-I60 was fused to a non-binding control (GPSP). The self-assembling, peptide-displaying, mixed micelles exhibit temperature-modulated avidities for immobilized and soluble fibrinogen at 32 °C and 42 °C. In this initial proof-of-concept design, the engineered mixed micelles were shown to disengage fibrinogen at elevated temperatures. The modular nature of this system can be used for developing in vivo depot systems that will only be triggered to release in situ upon specific stimuli.
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Affiliation(s)
- Allyson S C Soon
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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59
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60
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Gronau G, Krishnaji ST, Kinahan ME, Giesa T, Wong JY, Kaplan DL, Buehler MJ. A review of combined experimental and computational procedures for assessing biopolymer structure-process-property relationships. Biomaterials 2012; 33:8240-55. [PMID: 22938765 DOI: 10.1016/j.biomaterials.2012.06.054] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 06/22/2012] [Indexed: 02/08/2023]
Abstract
Tailored biomaterials with tunable functional properties are desirable for many applications ranging from drug delivery to regenerative medicine. To improve the predictability of biopolymer materials functionality, multiple design parameters need to be considered, along with appropriate models. In this article we review the state of the art of synthesis and processing related to the design of biopolymers, with an emphasis on the integration of bottom-up computational modeling in the design process. We consider three prominent examples of well-studied biopolymer materials - elastin, silk, and collagen - and assess their hierarchical structure, intriguing functional properties and categorize existing approaches to study these materials. We find that an integrated design approach in which both experiments and computational modeling are used has rarely been applied for these materials due to difficulties in relating insights gained on different length- and time-scales. In this context, multiscale engineering offers a powerful means to accelerate the biomaterials design process for the development of tailored materials that suit the needs posed by the various applications. The combined use of experimental and computational tools has a very broad applicability not only in the field of biopolymers, but can be exploited to tailor the properties of other polymers and composite materials in general.
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Affiliation(s)
- Greta Gronau
- Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
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61
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Yuvienco C, More HT, Haghpanah JS, Tu RS, Montclare JK. Modulating Supramolecular Assemblies and Mechanical Properties of Engineered Protein Materials by Fluorinated Amino Acids. Biomacromolecules 2012; 13:2273-8. [DOI: 10.1021/bm3005116] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Carlo Yuvienco
- Department of Chemical
and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York 11201, United States
| | - Haresh T. More
- Department of Chemical
and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York 11201, United States
| | - Jennifer S. Haghpanah
- Department of Chemical
and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York 11201, United States
| | - Raymond S. Tu
- Department of Chemical
Engineering, City College of New York, New York, New York 10031, United States
| | - Jin Kim Montclare
- Department of Chemical
and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York 11201, United States
- Department of Biochemistry, SUNY Downstate Medical Center, Brooklyn,
New York 11203, United States
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62
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Wu J, Gao L, Gao D. Multistage magnetic separation of microspheres enabled by temperature-responsive polymers. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3041-3046. [PMID: 22568650 DOI: 10.1021/am3004076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A simple and rapid method for separation of cells is to functionalize magnetic particles with a receptor that selectively captures the target and then pull the magnetic particles out of the mixture upon applying a magnetic field. The separation efficiency of magnetic separation, however, is typically limited by the nonspecific interaction between the magnetic particles and nontarget species. We here present a multistage separation process that is able to effectively circumvent the problem caused by the nonspecific interactions by introducing multiple capture-and-release cycles to the magnetic separation process. The multiple capture-and-release cycles are enabled by attaching a temperature-responsive polymer to both the magnetic particles and the targets. Through temperature cycling, we demonstrate that target microspheres can be separated from nontarget microspheres in multiple separation stages. The overall enrichment factor significantly increases with the number of separation stages and reaches as high as 1.87 × 10(5) after 5 cycles.
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Affiliation(s)
- Jiamin Wu
- Department of Chemical and Petroleum Engineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States
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63
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Shah M, Hsueh PY, Sun G, Chang HY, Janib SM, MacKay JA. Biodegradation of elastin-like polypeptide nanoparticles. Protein Sci 2012; 21:743-50. [PMID: 22434766 DOI: 10.1002/pro.2063] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 03/02/2012] [Accepted: 03/11/2012] [Indexed: 11/06/2022]
Abstract
Protein polymers are repetitive polypeptides produced by ribosomal biosynthetic pathways; furthermore, they offer emerging opportunities in drug and biopharmaceutical delivery. As for any polymer, biodegradation is one of the most important determinants affecting how a protein polymer can be utilized in the body. This study was designed to characterize the proteolytic biodegradation for a library of protein polymers derived from the human tropoelastin, the Elastin-like polypeptides (ELPs). ELPs are of particular interest for controlled drug delivery because they reversibly transition from soluble to insoluble above an inverse phase transition temperature (T(t)). More recently, ELP block copolymers have been developed that can assemble into micelles; however, it remains unclear if proteases can act on these ELP nanoparticles. For the first time, we demonstrate that ELP nanoparticles can be degraded by two model proteases and that comparable proteolysis occurs after cell uptake into a transformed culture of murine hepatocytes. Both elastase and collagenase endopeptidases can proteolytically degrade soluble ELPs. To our surprise, the ELP phase transition was protective against collagenase but not to elastase activity. These findings enhance our ability to predict how ELPs will biodegrade in different physiological microenvironments and are essential to develop protein polymers into biopharmaceuticals.
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Affiliation(s)
- Mihir Shah
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, California 90033-9121, USA
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64
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Moktan S, Perkins E, Kratz F, Raucher D. Thermal targeting of an acid-sensitive doxorubicin conjugate of elastin-like polypeptide enhances the therapeutic efficacy compared with the parent compound in vivo. Mol Cancer Ther 2012; 11:1547-56. [PMID: 22532601 DOI: 10.1158/1535-7163.mct-11-0998] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Elastin-like polypeptides (ELP) aggregate in response to mild hyperthermia, but remain soluble under normal physiologic conditions. ELP macromolecules can accumulate in solid tumors because of the enhanced permeability and retention effect. Tumor retention of ELPs can be further enhanced through hyperthermia-induced aggregation of ELPs by local heating of the tumor. We evaluated the therapeutic potential of ELPs in delivering doxorubicin in the E0771 syngeneic mouse breast cancer model. The ELP-Dox conjugate consisted of a cell-penetrating peptide at the N-terminus and the 6-maleimidocaproyl hydrazone derivative of doxorubicin at the C-terminus of ELP. The acid-sensitive hydrazone linker ensured release of doxorubicin in the lysosomes/endosomes after cellular uptake of the drug conjugate. ELP-Dox dosed at 5 mg doxorubicin equivalent/kg, extended the plasma half-life of doxorubicin to 5.5 hours. In addition, tumor uptake of ELP-Dox increased 2-fold when hyperthermia was applied, and was also enhanced compared to free doxorubicin. Although high levels of doxorubicin were found in the heart of animals treated with free doxorubicin, no detectable levels of doxorubicin were found in ELP-Dox-treated animals, indicating a correlation between tumor targeting and reduction of potential cardiac toxicity by ELP-Dox. At an optimal dose of 12 mg doxorubicin equivalent/kg, ELP-Dox in combination with hyperthermia induced a complete tumor growth inhibition, which was distinctly superior to free drug that only moderately inhibited tumor growth. In summary, our findings show that thermal targeting of ELP increases the potency of doxorubicin underlying the potential of exploiting ELPs to enhance the therapeutic efficacy of conventional anticancer drugs.
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Affiliation(s)
- Shama Moktan
- Department of Biochemistry, University of Mississippi Medical Center, Jackson, Mississippi 39216, USA
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65
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Anticancer activity of proapoptotic peptides is highly improved by thermal targeting using elastin-like polypeptides. Int J Pept Res Ther 2012; 18:227-237. [PMID: 23105921 DOI: 10.1007/s10989-012-9295-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Inducing apoptosis in cancer cells is an effective strategy for cancer therapy. The cationic α-helix forming KLAKLAKKLAKLAK peptide (KLAK) has been known to induce apoptosis by disrupting the mitochondria. In the present study, we have designed a thermally targeted KLAK peptide by genetically engineering the KLAK sequence to the carboxy terminus of the heat responsive biopolymer elastin-like polypeptide (ELP). The cellular internalization of ELP-KLAK was made possible by engineering a cell penetrating peptide sequence (SynB1) to the amino terminus of ELP. The SynB1-ELP1-KLAK fusion polypeptide was cytotoxic against both estrogen receptor positive and negative human breast cancer cell lines. The potency of SynB1-ELP1-KLAK was further enhanced when mild hyperthermia was added to the treatment. In response to hyperthermia, SynB1-ELP1-KLAK selectively triggered apoptosis, which was associated with disruption of the mitochondria. The thermally responsive SynB1-ELP-KLAK polypeptide can have improved tumor targeting by the application of mild hyperthermia. Furthermore, the pharmacokinetic properties of ELP can prevent degradation of KLAK in vivo, and the use of SynB1 can mediate tumor cell uptake, thereby augmenting the effect of KLAK.
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66
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Wu R, Li Y, Wang Q, Yu J, Jiang F, Wang F, Zhang X. Biosilica structures with controllable morphology produced by an electrochemical process on indium tin oxide surfaces. RSC Adv 2012. [DOI: 10.1039/c2ra21326e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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67
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Gomes S, Leonor IB, Mano JF, Reis RL, Kaplan DL. Natural and Genetically Engineered Proteins for Tissue Engineering. Prog Polym Sci 2012; 37:1-17. [PMID: 22058578 PMCID: PMC3207498 DOI: 10.1016/j.progpolymsci.2011.07.003] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
To overcome the limitations of traditionally used autografts, allografts and, to a lesser extent, synthetic materials, there is the need to develop a new generation of scaffolds with adequate mechanical and structural support, control of cell attachment, migration, proliferation and differentiation and with bio-resorbable features. This suite of properties would allow the body to heal itself at the same rate as implant degradation. Genetic engineering offers a route to this level of control of biomaterial systems. The possibility of expressing biological components in nature and to modify or bioengineer them further, offers a path towards multifunctional biomaterial systems. This includes opportunities to generate new protein sequences, new self-assembling peptides or fusions of different bioactive domains or protein motifs. New protein sequences with tunable properties can be generated that can be used as new biomaterials. In this review we address some of the most frequently used proteins for tissue engineering and biomedical applications and describe the techniques most commonly used to functionalize protein-based biomaterials by combining them with bioactive molecules to enhance biological performance. We also highlight the use of genetic engineering, for protein heterologous expression and the synthesis of new protein-based biopolymers, focusing the advantages of these functionalized biopolymers when compared with their counterparts extracted directly from nature and modified by techniques such as physical adsorption or chemical modification.
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Affiliation(s)
- Sílvia Gomes
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909 Taipas, Guimarães, Portugal
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68
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Wang Q, Yu J, Yan Y, Xu S, Wang F, Li Q, Wang J, Zhang X, Liu D. Controlled biomimetic silica formation using star-shaped poly(l-lysine). Polym Chem 2012. [DOI: 10.1039/c2py20070h] [Citation(s) in RCA: 13] [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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69
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Kim W, Xiao J, Chaikof EL. Recombinant amphiphilic protein micelles for drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14329-14334. [PMID: 21973265 PMCID: PMC3226903 DOI: 10.1021/la202864x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Amphiphilic block polypeptides can self-assemble into a range of nanostructures in solution, including micelles and vesicles. Our group has recently described the capacity of recombinant amphiphilic diblock copolypeptides to form highly stable micelles. In this report, we demonstrate the utility of protein nanoparticles to serve as a vehicle for controlled drug delivery. Drug-loaded micelles were produced by encapsulating dipyridamole as a model hydrophobic drug with anti-inflammatory activity. Murine studies confirmed the capacity of drug-loaded protein micelles to limit the in vivo recruitment of neutrophils in response to an inflammatory stimulus.
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Affiliation(s)
| | | | - Elliot L. Chaikof
- Address correspondence to: Elliot L. Chaikof, M.D., Ph.D. Department of Surgery Beth Israel Deaconess Medical Center 110 Francis St, Suite 9F Boston, MA 02115 Tel: (617) 632-9581
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70
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Dai M, Haghpanah J, Singh N, Roth EW, Liang A, Tu RS, Montclare JK. Artificial Protein Block Polymer Libraries Bearing Two SADs: Effects of Elastin Domain Repeats. Biomacromolecules 2011; 12:4240-6. [DOI: 10.1021/bm201083d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Min Dai
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of NYU,
Brooklyn, New York 11201, United States
| | - Jennifer Haghpanah
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of NYU,
Brooklyn, New York 11201, United States
| | - Navjot Singh
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of NYU,
Brooklyn, New York 11201, United States
| | - Eric W. Roth
- Skirball Institute Image Core
Facility, New York University Medical Center, New York, New York 10016, United States
| | - Alice Liang
- Skirball Institute Image Core
Facility, New York University Medical Center, New York, New York 10016, United States
| | - Raymond S. Tu
- Department of Chemical Engineering, City College of New York, New York, New York 10031,
United States
| | - Jin Kim Montclare
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of NYU,
Brooklyn, New York 11201, United States
- Department
of Biochemistry, SUNY Downstate Medical Center, Brooklyn, New York 11203,
United States
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71
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Ghoorchian A, Holland NB. Molecular architecture influences the thermally induced aggregation behavior of elastin-like polypeptides. Biomacromolecules 2011; 12:4022-9. [PMID: 21972921 DOI: 10.1021/bm201031m] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Elastin-like polypeptides are thermally responsive polymers that exhibit phase separation above a transition temperature. The effect of molecular architecture on the temperature responsive behavior of elastin-like polypeptide solutions was investigated by characterization of solutions of three-armed star polypeptides, linear polypeptides, and their mixtures. These biosynthesized polypeptides have precise lengths and amino acid sequences. Transition temperatures were measured as a function of molecular weight and solution concentration and compared to their linear counterparts. Like their linear counterparts, the transition temperature is linearly related to log concentration. A mathematical relationship was used to fit the transition temperature data of different polypeptide lengths to a volume-based concentration using the polymer coil volume. The results of this model suggest that the linear ELP is in a random coil conformation at the transition temperature while the three-armed ELP is in a compact extended coil conformation, consistent with different pathways for aggregation. Solutions containing both trimer and linear constructs have two transition temperatures, further supporting differing aggregation behaviors.
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Affiliation(s)
- Ali Ghoorchian
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, Ohio 44115, United States
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72
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Biodegradable hybrid recombinant block copolymers for non-viral gene transfection. Int J Pharm 2011; 427:105-12. [PMID: 21983093 DOI: 10.1016/j.ijpharm.2011.09.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 09/12/2011] [Accepted: 09/24/2011] [Indexed: 12/28/2022]
Abstract
Thermal targeting of therapeutic genes can enhance local gene concentration to maximize their efficacy. However, lack of safe and efficient carriers has impeded the development of this delivery option. Herein, we report the preparation and evaluation of a hybrid recombinant material, p[Asp(DET)](53)ELP(1-90), that possess a thermo-responsive elastin-like polypeptide (ELP) segment and a diethylenetriamine (DET) modified poly-L-aspartic acid segment. The term, hybrid, indicates that the material was prepared by genetic engineering and synthetic chemistry. In summary, the thermal phase transition behavior and cytotoxicity of the biodegradable copolymer were studied. The polyplexes formed by the copolymer and pGL4 plasmid were characterized by dynamic light scattering and ζ-potential measurements. The polyplexes retained the thermal phase transition behavior conferred by the copolymer; however, they exhibited a two-step transition process not seen with the copolymer. The polyplexes also showed appreciable transfection efficiency with low cytotoxicity.
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73
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Kushner AM, Guan Z. Modulares Design in natürlichen und biomimetischen elastischen Materialien. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006496] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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74
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Kushner AM, Guan Z. Modular design in natural and biomimetic soft materials. Angew Chem Int Ed Engl 2011; 50:9026-57. [PMID: 21898722 DOI: 10.1002/anie.201006496] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Indexed: 11/09/2022]
Abstract
Under eons of evolutionary and environmental pressure, biological systems have developed strong and lightweight peptide-based polymeric materials by using the 20 naturally occurring amino acids as principal monomeric units. These materials outperform their man-made counterparts in the following ways: 1) multifunctionality/tunability, 2) adaptability/stimuli-responsiveness, 3) synthesis and processing under ambient and aqueous conditions, and 4) recyclability and biodegradability. The universal design strategy that affords these advanced properties involves "bottom-up" synthesis and modular, hierarchical organization both within and across multiple length-scales. The field of "biomimicry"-elucidating and co-opting nature's basic material design principles and molecular building blocks-is rapidly evolving. This Review describes what has been discovered about the structure and molecular mechanisms of natural polymeric materials, as well as the progress towards synthetic "mimics" of these remarkable systems.
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Affiliation(s)
- Aaron M Kushner
- Department of Chemistry, University of California, Irvine, CA 92697-2025, USA
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75
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Bracalello A, Santopietro V, Vassalli M, Marletta G, Del Gaudio R, Bochicchio B, Pepe A. Design and production of a chimeric resilin-, elastin-, and collagen-like engineered polypeptide. Biomacromolecules 2011; 12:2957-65. [PMID: 21707089 DOI: 10.1021/bm2005388] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein-inspired biomaterials have gained great interest as an alternative to synthetic polymers, in particular, for their potential use as biomedical devices. The potential inspiring models are mainly proteins able to confer mechanical properties to tissues and organs, such as elasticity (elastin, resilin, spider silk) and strength (collagen, silk). The proper combination of repetitive sequences, each of them derived from different proteins, represents a useful tool for obtaining biomaterials with tailored mechanical properties and biological functions. In this report we describe the design, the production, and the preliminary characterization of a chimeric polypeptide, based on sequences derived from the highly resilient proteins resilin and elastin and from collagen-like sequences. The results show that the obtained chimeric recombinant material exhibits promising self-assembling properties. Young's modulus of the fibers was determined by AFM image analysis and lies in the range of 0.1-3 MPa in agreement with the expectations for elastin-like and resilin-like materials.
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Affiliation(s)
- Angelo Bracalello
- Department of Chemistry Antonio M. Tamburrro, University of Basilicata , 85100 Potenza, Italy
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76
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Amiram M, Quiroz FG, Callahan DJ, Chilkoti A. A highly parallel method for synthesizing DNA repeats enables the discovery of 'smart' protein polymers. NATURE MATERIALS 2011; 10:141-8. [PMID: 21258353 PMCID: PMC3075872 DOI: 10.1038/nmat2942] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Accepted: 12/09/2010] [Indexed: 05/24/2023]
Abstract
Robust high-throughput synthesis methods are needed to expand the repertoire of repetitive protein-polymers for different applications. To address this need, we developed a new method, overlap extension rolling circle amplification (OERCA), for the highly parallel synthesis of genes encoding repetitive protein-polymers. OERCA involves a single PCR-type reaction for the rolling circle amplification of a circular DNA template and simultaneous overlap extension by thermal cycling. We characterized the variables that control OERCA and demonstrated its superiority over existing methods, its robustness, high-throughput and versatility by synthesizing variants of elastin-like polypeptides (ELPs) and protease-responsive polymers of glucagon-like peptide-1 analogues. Despite the GC-rich, highly repetitive sequences of ELPs, we synthesized remarkably large genes without recursive ligation. OERCA also enabled us to discover 'smart' biopolymers that exhibit fully reversible thermally responsive behaviour. This powerful strategy generates libraries of repetitive genes over a wide and tunable range of molecular weights in a 'one-pot' parallel format.
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Affiliation(s)
- Miriam Amiram
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708-0281, USA
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77
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Jeon WB. Contribution of lysine-containing cationic domains to thermally-induced phase transition of elastin-like proteins and their sensitivity to different stimuli. BMB Rep 2011; 44:22-7. [DOI: 10.5483/bmbrep.2011.44.1.22] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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78
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Peptide-Based and Polypeptide-Based Hydrogels for Drug Delivery and Tissue Engineering. Top Curr Chem (Cham) 2011; 310:135-67. [DOI: 10.1007/128_2011_206] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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79
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Recombinant elastin-mimetic biomaterials: Emerging applications in medicine. Adv Drug Deliv Rev 2010; 62:1468-78. [PMID: 20441783 DOI: 10.1016/j.addr.2010.04.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 04/15/2010] [Accepted: 04/17/2010] [Indexed: 12/11/2022]
Abstract
Biomaterials derived from protein-based block copolymers are increasingly investigated for potential application in medicine. In particular, recombinant elastin block copolymers provide significant opportunities to modulate material microstructure and can be processed in various forms, including particles, films, gels, and fiber networks. As a consequence, biological and mechanical responses of elastin-based biomaterials are tunable through precise control of block size and amino acid sequence. In this review, the synthesis of a set of elastin-mimetic triblock copolymers and their diverse processing methods for generating material platforms currently applied in medicine will be discussed.
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80
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Mackay JA, Callahan DJ, Fitzgerald KN, Chilkoti A. Quantitative model of the phase behavior of recombinant pH-responsive elastin-like polypeptides. Biomacromolecules 2010; 11:2873-9. [PMID: 20925333 PMCID: PMC3032028 DOI: 10.1021/bm100571j] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Quantitative models are required to engineer biomaterials with environmentally responsive properties. With this goal in mind, we developed a model that describes the pH-dependent phase behavior of a class of stimulus responsive elastin-like polypeptides (ELPs) that undergo reversible phase separation in response to their solution environment. Under isothermal conditions, charged ELPs can undergo phase separation when their charge is neutralized. Optimization of this behavior has been challenging because the pH at which they phase separate, pHt, depends on their composition, molecular weight, concentration, and temperature. To address this problem, we developed a quantitative model to describe the phase behavior of charged ELPs that uses the Henderson-Hasselbalch relationship to describe the effect of side-chain ionization on the phase-transition temperature of an ELP. The model was validated with pH-responsive ELPs that contained either acidic (Glu) or basic (His) residues. The phase separation of both ELPs fit this model across a range of pH. These results have important implications for applications of pH-responsive ELPs because they provide a quantitative model for the rational design of pH-responsive polypeptides whose transition can be triggered at a specified pH.
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Affiliation(s)
- J Andrew Mackay
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham, North Carolina 27708-0281, United States, St. Jude Medical, 11175 Cicero Drive, Suite 675, Alpharetta, Georgia 30022, United States, and Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Avenue, Los Angeles, California 90033-9121, United States
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81
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Bandiera A, Sist P, Urbani R. Comparison of Thermal Behavior of Two Recombinantly Expressed Human Elastin-Like Polypeptides for Cell Culture Applications. Biomacromolecules 2010; 11:3256-65. [DOI: 10.1021/bm100644m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonella Bandiera
- Department of Life Sciences, University of Trieste, via L. Giorgieri, 1, 34127 Trieste, Italy
| | - Paola Sist
- Department of Life Sciences, University of Trieste, via L. Giorgieri, 1, 34127 Trieste, Italy
| | - Ranieri Urbani
- Department of Life Sciences, University of Trieste, via L. Giorgieri, 1, 34127 Trieste, Italy
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82
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Abstract
Elastomeric proteins are characterized by their large extensibility before rupture, reversible deformation without loss of energy, and high resilience upon stretching. Motivated by their unique mechanical properties, there has been tremendous research in understanding and manipulating elastomeric polypeptides, with most work conducted on the elastins but more recent work on an expanded set of polypeptide elastomers. Facilitated by biosynthetic strategies, it has been possible to manipulate the physical properties, conformation, and mechanical properties of these materials. Detailed understanding of the roles and organization of the natural structural proteins has permitted the design of elastomeric materials with engineered properties, and has thus expanded the scope of applications from elucidation of the mechanisms of elasticity to the development of advanced drug delivery systems and tissue engineering substrates.
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Affiliation(s)
| | | | - Kristi L. Kiick
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA
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83
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Cirulis JT, Keeley FW. Kinetics and Morphology of Self-Assembly of an Elastin-like Polypeptide Based on the Alternating Domain Arrangement of Human Tropoelastin. Biochemistry 2010; 49:5726-33. [DOI: 10.1021/bi100468v] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Judith T. Cirulis
- Molecular Structure and Function Program, Research Institute, The Hospital for Sick Children, and Department of Biochemistry, University of Toronto, 555 University Avenue, Toronto, Ontario, Canada M5G1X8
| | - Fred W. Keeley
- Molecular Structure and Function Program, Research Institute, The Hospital for Sick Children, and Department of Biochemistry, University of Toronto, 555 University Avenue, Toronto, Ontario, Canada M5G1X8
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84
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Abstract
The study of the interactions of salts and osmolytes with macromolecules in aqueous solution originated with experiments concerning protein precipitation more than 100 years ago. Today, these solutes are known to display recurring behavior for myriad biological and chemical processes. Such behavior depends both on the nature and concentration of the species in solution. Despite the generality of these effects, our understanding of the molecular-level details of ion and osmolyte specificity is still quite limited. Here, we review recent studies of the interactions between anions and urea with model macromolecular systems. A mechanism for specific ion effects is elucidated for aqueous systems containing charged and uncharged polymers, polypeptides, and proteins. The results clearly show that the effects of the anions are local and involve direct interactions with macromolecules and their first hydration shell. Also, a hydrogen-bonding mechanism is tested for the urea denaturation of proteins with some of these same systems. In that case, direct hydrogen bonding can be largely discounted as the key mechanism for urea stabilization of uncollapsed and/or unfolded structures.
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Affiliation(s)
- Yanjie Zhang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
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85
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Kim W, Thévenot J, Ibarboure E, Lecommandoux S, Chaikof E. Self-Assembly of Thermally Responsive Amphiphilic Diblock Copolypeptides into Spherical Micellar Nanoparticles. Angew Chem Int Ed Engl 2010; 49:4257-60. [DOI: 10.1002/anie.201001356] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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86
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Kim W, Thévenot J, Ibarboure E, Lecommandoux S, Chaikof E. Self-Assembly of Thermally Responsive Amphiphilic Diblock Copolypeptides into Spherical Micellar Nanoparticles. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001356] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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87
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Ghoorchian A, Cole JT, Holland NB. Thermoreversible Micelle Formation Using a Three-Armed Star Elastin-like Polypeptide. Macromolecules 2010. [DOI: 10.1021/ma100285v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ali Ghoorchian
- Department of Chemical & Biomedical Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, Ohio 44115
| | - James T. Cole
- Department of Chemical & Biomedical Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, Ohio 44115
| | - Nolan B. Holland
- Department of Chemical & Biomedical Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, Ohio 44115
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88
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Chen Y, Guan Z. Bioinspired Modular Synthesis of Elastin-Mimic Polymers To Probe the Mechanism of Elastin Elasticity. J Am Chem Soc 2010; 132:4577-9. [DOI: 10.1021/ja9104446] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yulin Chen
- Department of Chemistry, University of California, 1102 Natural Sciences 2, Irvine, California 92697-2025
| | - Zhibin Guan
- Department of Chemistry, University of California, 1102 Natural Sciences 2, Irvine, California 92697-2025
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89
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Ge X, Hoare T, Filipe CDM. Protein-based aqueous-multiphasic systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4087-4094. [PMID: 20151673 DOI: 10.1021/la9045463] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This paper reports the formation of aqueous-multiphasic systems (AMPS) exclusively made using elastin-like polypeptides (ELP) which have the ability to undergo reversible inverse phase transitions. Manipulating variables such as the salt concentration and the molecular weight and the composition of ELPs (using different amino acid sequences or by fusing the ELP with different functional proteins) permits modulation of the temperature at which phase transition takes place, the number of phases that are formed, and the composition of the multiple aqueous phases. Using these variables, isotropic hybrid colloids with tunable functionality (in this case, fluorescent intensity) and anisotropic colloids with variable morphologies could be generated. While formation of AMPS and anisotropic colloids has been reported in the literature using synthetic polymers, to our knowledge this is the first report of generating such systems using proteins.
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Affiliation(s)
- Xin Ge
- Department of Chemical Engineering, McMaster University, Hamilton, ON L8S 4L7, Canada
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90
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Du FS, Huang XN, Chen GT, Lin SS, Liang D, Li ZC. Aqueous Solution Properties of the Acid-Labile Thermoresponsive Poly(meth)acrylamides with Pendent Cyclic Orthoester Groups. Macromolecules 2010. [DOI: 10.1021/ma902227g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fu-Sheng Du
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Xiao-Nan Huang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Guang-Tao Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Shrong-Shi Lin
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Dehai Liang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Zi-Chen Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
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91
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MacKay JA, Chen M, McDaniel JR, Liu W, Simnick AJ, Chilkoti A. Self-assembling chimeric polypeptide-doxorubicin conjugate nanoparticles that abolish tumours after a single injection. NATURE MATERIALS 2009; 8:993-9. [PMID: 19898461 PMCID: PMC2862348 DOI: 10.1038/nmat2569] [Citation(s) in RCA: 446] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Accepted: 10/02/2009] [Indexed: 05/19/2023]
Abstract
New strategies to self-assemble biocompatible materials into nanoscale, drug-loaded packages with improved therapeutic efficacy are needed for nanomedicine. To address this need, we developed artificial recombinant chimeric polypeptides (CPs) that spontaneously self-assemble into sub-100-nm-sized, near-monodisperse nanoparticles on conjugation of diverse hydrophobic molecules, including chemotherapeutics. These CPs consist of a biodegradable polypeptide that is attached to a short Cys-rich segment. Covalent modification of the Cys residues with a structurally diverse set of hydrophobic small molecules, including chemotherapeutics, leads to spontaneous formation of nanoparticles over a range of CP compositions and molecular weights. When used to deliver chemotherapeutics to a murine cancer model, CP nanoparticles have a fourfold higher maximum tolerated dose than free drug, and induce nearly complete tumour regression after a single dose. This simple strategy can promote co-assembly of drugs, imaging agents and targeting moieties into multifunctional nanomedicines.
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Affiliation(s)
- J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, 90033-9121, USA
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92
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Cho Y, Sagle LB, Iimura S, Zhang Y, Kherb J, Chilkoti A, Scholtz JM, Cremer PS. Hydrogen Bonding of β-Turn Structure Is Stabilized in D2O. J Am Chem Soc 2009; 131:15188-93. [DOI: 10.1021/ja9040785] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Younhee Cho
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Laura B. Sagle
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Satoshi Iimura
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Yanjie Zhang
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Jaibir Kherb
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Ashutosh Chilkoti
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - J. Martin Scholtz
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
| | - Paul S. Cremer
- Department of Chemistry, Texas A&M University, 3255 TAMU, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas 77843, and Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708
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93
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Conrad R, Grubbs R. Tunable, Temperature-Responsive Polynorbornenes with Side Chains Based on an Elastin Peptide Sequence. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903888] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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94
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Ge X, Conley AJ, Brandle JE, Truant R, Filipe CDM. In vivo formation of protein based aqueous microcompartments. J Am Chem Soc 2009; 131:9094-9. [PMID: 19496598 DOI: 10.1021/ja902890r] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper, we report the formation of protein based liquid droplets resulting in the formation of in vivo microcompartments in E. coli or tobacco cells. These microcompartments were generated by expressing elastin-like polypeptides (ELP), which have the ability to undergo a reversible phase transition, resulting in the formation of an aqueous two-phase system (ATPS) in the cytoplasm of the cell. We prove that these microcompartments are liquid by expressing a fusion protein consisting of ELP and GFP and by performing fluorescence recovery after photobleaching (FRAP) experiments at different stages of cell cultivation. In the initial phases of cell growth, the fusion protein concentration is low and is not sufficient to drive the formation of a second aqueous phase. As the intracellular fusion protein concentration increases with longer cultivation time, droplets start forming, and as protein expression continues, the droplets coalesce at the poles of the E. coli cells. FRAP experiments with cells at different growth stages reveals that the protein in these ELP based droplets is comprised of aqueous and not solid aggregates, as seen in typical inclusion bodies. Staining of the ribosomes and coimaging of the ELP-GFP fusion protein showed that these compartments exclude the protein making machinery of the cell, acting as depots for newly formed protein. It is also shown, in vitro, that ELP based droplets result in the exclusion of proteases, protecting proteins from degradation. Additional studies are still required to test this possibility in vivo. To the best of our knowledge, this is the first report characterizing the formation of an engineered extra aqueous phase in a living organism.
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Affiliation(s)
- Xin Ge
- Department of Chemical Engineering, McMaster University, Hamilton, ON L8S 4L7 Canada
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95
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Fujita Y, Mie M, Kobatake E. Construction of nanoscale protein particle using temperature-sensitive elastin-like peptide and polyaspartic acid chain. Biomaterials 2009; 30:3450-7. [DOI: 10.1016/j.biomaterials.2009.03.012] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Accepted: 03/04/2009] [Indexed: 11/26/2022]
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96
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Jeong Y, Joo MK, Bahk KH, Choi YY, Kim HT, Kim WK, Jeong Lee H, Sohn YS, Jeong B. Enzymatically degradable temperature-sensitive polypeptide as a new in-situ gelling biomaterial. J Control Release 2009; 137:25-30. [DOI: 10.1016/j.jconrel.2009.03.008] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 03/09/2009] [Accepted: 03/15/2009] [Indexed: 11/26/2022]
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97
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Wu Y, MacKay JA, McDaniel JR, Chilkoti A, Clark RL. Fabrication of elastin-like polypeptide nanoparticles for drug delivery by electrospraying. Biomacromolecules 2009; 10:19-24. [PMID: 19072041 DOI: 10.1021/bm801033f] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of environmentally responsive drug carriers requires new methods for assembling stimuli-responsive nanoparticulates. This communication describes a novel application of electrospray to construct bioresponsive peptide-based particulates, which can encapsulate drugs. These particles are composed from genetically engineered elastin-like polypeptides (ELPs), a biodegradable, biocompatible, and bioresponsive polymer. To generate nanoparticles (300-400 nm in diameter), ELPs and drugs are codissolved in organic solvent, accelerated across a voltage gradient, dried by evaporation during transit, and collected from a target surface. These findings indicate that particle diameter, polydispersity, and morphology are strong functions of the solvent concentration, spraying voltage, and polymer molecular weight. Surprisingly, the loading of drug at 20 w/w% did not influence particle morphology; furthermore, drug release from these particles correlated with the pH-dependent solubility of the parent ELPs. These studies suggest that electrospray is an efficient and flexible method for generating stimuli-responsive drug particles.
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Affiliation(s)
- Yiquan Wu
- Center for Biologicallyh Inspired Materials and Material Systems, Department of Mechanical Engineering and Materials Science, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
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98
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Kopecek J, Yang J. Peptide-directed self-assembly of hydrogels. Acta Biomater 2009; 5:805-16. [PMID: 18952513 PMCID: PMC2677391 DOI: 10.1016/j.actbio.2008.10.001] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2008] [Revised: 09/09/2008] [Accepted: 10/01/2008] [Indexed: 01/17/2023]
Abstract
This review focuses on the self-assembly of macromolecules mediated by the biorecognition of peptide/protein domains. Structures forming alpha-helices and beta-sheets have been used to mediate self-assembly into hydrogels of peptides, reactive copolymers and peptide motifs, block copolymers, and graft copolymers. Structural factors governing the self-assembly of these molecules into precisely defined three-dimensional structures (hydrogels) are reviewed. The incorporation of peptide motifs into hybrid systems, composed of synthetic and natural macromolecules, enhances design opportunities for new biomaterials when compared to individual components.
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Affiliation(s)
- Jindrich Kopecek
- Department of Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA.
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Kim B, Chilkoti A. Allosteric actuation of inverse phase transition of a stimulus-responsive fusion polypeptide by ligand binding. J Am Chem Soc 2009; 130:17867-73. [PMID: 19055326 DOI: 10.1021/ja8059057] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report herein a biopolymer actuator with a modular design that allosterically transduces ligand binding into an aqueous demixing phase transition. The biopolymer actuator consists of two modular domains: a ligand binding protein domain, calmodulin (CaM), that is fused to a transducer domain, a stimulus-responsive elastin-like polypeptide (ELP) that exhibits a reversible lower critical solution temperature (LCST) phase transition. We demonstrate that binding of calcium to CaM spontaneously triggers the phase transition of the attached ELP, leading to formation of meso-microscale particles depending on the chain length of the ELP. This behavior is reversible as chelation of the bound calcium results in dissolution of the assembled particles, is selective for calcium as opposed to magnesium, and is abolished by the binding of a peptide ligand that is specific to calcium-bound CaM. These results are, to our knowledge, the first demonstration of biomolecular recognition-triggered, allosteric regulation of the LCST phase transition of a polymer and are significant because they expand the available triggers of the LCST transition of stimulus-responsive polymers to biochemical ligand binding. The ability to allosterically trigger the LCST transition of ELPs by biomolecular recognition will be useful for developing "smart" polymer actuators that capitalize upon the myriad ligand-protein pairs that are available from biology and for application in the design of selective pull-down assays in proteomics, drug delivery, and nanoscale biomolecular devices.
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Affiliation(s)
- Bumjoon Kim
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708-0281, USA
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100
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Teeuwen RLM, van Berkel SS, van Dulmen THH, Schoffelen S, Meeuwissen SA, Zuilhof H, de Wolf FA, van Hest JCM. “Clickable” elastins: elastin-like polypeptides functionalized with azide or alkyne groups. Chem Commun (Camb) 2009:4022-4. [DOI: 10.1039/b903903a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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