1
|
Yoshida K, Fujita S, Matsusaki M. Analysis of Homo- and Heterotriple Helix Formation of Collagen Model Peptides and Evaluation of Their Stability in a Biological Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38316021 DOI: 10.1021/acs.langmuir.3c03673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Self-assembled materials have attracted attention and have been extensively studied because the reversibility of noncovalent interactions allows them to possess various properties, such as stimulus responsiveness and self-healing. Collagen model peptides have an amino acid sequence characteristic of the triple helix region of collagen and exhibit repeatable triple helix formation. Many studies of their applications have used homotrimers, and although some studies on heterotrimers have been reported, few have clarified the details. If the characteristics of heterotrimers can be revealed, they are expected to be applied as new self-assembled materials. In this study, we analyzed the detailed self-assembling properties of hetero- and homohelices formed by (proline-proline-glycine)10 (PPG)10 and (proline-hydroxyproline-glycine)10 (POG)10 to evaluate the potential of the helices for biomedical application. Fluorescein isothiocyanate-labeled (PPG)10 (F(PPG)10) and (POG)10 (F(POG)10) were synthesized to analyze the heterotriple helix formation using concentration quenching based on triple helix formation. When (PPG)10 was added to F(POG)10, the fluorescence intensity did not reach a plateau, while the fluorescence intensity reached about 100% in the other pairs such as (POG)10-F(POG)10, (PPG)10-F(PPG)10, and (POG)10-F(PPG)10. The critical triple helix formation concentration was 7 μM for the heterotrimer prepared under 1:2 mixing conditions of (PPG)10 and (POG)10, 320 μM for [(PPG)10]3, and 4 μM for [(POG)10]3, indicating that the triple helix formation concentration of the heterotrimer is almost half that of [(POG)10]3 but 45 times higher than [(PPG)10]3. Furthermore, the heterotrimer formed at 37 °C was stable after 5 days, which was the same as [(POG)10]3. These results suggest that heterotrimers have different association properties from homotrimers and are expected to be applied in nanotechnology and biomaterials as new self-assembled materials.
Collapse
Affiliation(s)
- Kazuki Yoshida
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoshi Fujita
- AIST-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology (AIST), 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Michiya Matsusaki
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| |
Collapse
|
2
|
Subrahmanyam N, Yathavan B, Kessler J, Yu SM, Ghandehari H. HPMA copolymer-collagen hybridizing peptide conjugates targeted to breast tumor extracellular matrix. J Control Release 2023; 353:278-288. [PMID: 36244509 PMCID: PMC10799842 DOI: 10.1016/j.jconrel.2022.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/04/2022] [Accepted: 10/09/2022] [Indexed: 12/03/2022]
Abstract
The extracellular matrix (ECM) is dynamically involved in many aspects of cell growth and survival, and it plays an active role in cancer etiology. In comparison to healthy ECM, tumor associated ECM shows high collagen deposition and remodeling activity, which results in an increased amount of denatured collagen strands in tumor tissues. Capitalizing on this distinguishing feature, we developed tumor-localizing polymeric carriers that selectively bind to denatured collagen in the tumor ECM. We synthesized N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers with their side chains conjugated to collagen hybridizing peptides (CHPs). HPMA copolymer-CHP conjugates exhibited selective affinity to denatured collagen and localized to tumors in an orthotopic MDA-MB-231 murine breast cancer model. The conjugates had increased tumor localization compared to copolymers with scrambled peptides in the side chains, as well as increased retention compared to free CHPs. Such conjugates show promise as carriers for ECM-acting drugs and imaging agents in the management of diseases characterized by high ECM remodeling activity.
Collapse
Affiliation(s)
- Nithya Subrahmanyam
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America
| | - Bhuvanesh Yathavan
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America
| | - Julian Kessler
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America
| | - S Michael Yu
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America.
| | - Hamidreza Ghandehari
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America.
| |
Collapse
|
3
|
Hulgan SAH, Hartgerink JD. Recent Advances in Collagen Mimetic Peptide Structure and Design. Biomacromolecules 2022; 23:1475-1489. [PMID: 35258280 DOI: 10.1021/acs.biomac.2c00028] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Collagen mimetic peptides (CMPs) fold into a polyproline type II triple helix, allowing the study of the structure and function (or misfunction) of the collagen family of proteins. This Perspective will focus on recent developments in the use of CMPs toward understanding the structure and controlling the stability of the triple helix. Triple helix assembly is influenced by various factors, including the single amino acid propensity for the triple helix fold, pairwise interactions between these amino acids, and long-range effects observed across the helix, such as bend, twist, and fraying. Important progress in creating a comprehensive and predictive understanding of these factors for peptides with exclusively natural amino acids has been made. In contrast, several groups have successfully developed unnatural amino acids that are engineered to stabilize the triple helical structure. A third approach to controlling the triple helical structure includes covalent cross-linking of the triple helix to stabilize the assembly, which eliminates the problematic equilibrium of unfolding into monomers and enforces compositional control. Advances in all these areas have resulted in significant improvements to our understanding and control of this important class of protein, allowing for the design and application of more chemically complex and well-controlled collagen mimetic biomaterials.
Collapse
Affiliation(s)
- Sarah A H Hulgan
- Rice University, Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| | - Jeffrey D Hartgerink
- Rice University, Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| |
Collapse
|
4
|
Röber M, Scheibel T, Börner HG. Toward Activatable Collagen Mimics: Combining DEPSI "Switch" Defects and Template-Guided Self-Organization to Control Collagen Mimetic Peptides. Macromol Biosci 2021; 21:e2100070. [PMID: 34008293 DOI: 10.1002/mabi.202100070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/16/2021] [Indexed: 11/10/2022]
Abstract
Collagen mimetic peptides (CMPs), which imitate various structural or functional features of natural collagen, constitute advanced models illuminating the folding aspects of the collagen triple helix (CTH) motif. In this study, the CMPs of repeating Gly-Pro-Pro (GPP) triplets are tethered to an organic scaffold based on a tris(2-aminoethyl) amine (TREN) derivative (TREN(sucOH)3 ). These three templated peptide strands are further expanded via native chemical ligation to increase the number of GPP triplets and lead to a TREN(sucGPPGPPG(Ψ)SPGPPCPP[GPP]4 )3 construct. The incorporation of an ester switch segment, G(Ψ)S, as a positional O-acyl isopeptide (DEPSI) defect into the peptide strands allows the pH-controlled acceleration of CTH formation. The strand assembly process is monitored by circular dichroism (CD) spectroscopy. The results of pH jump experiments and thermal denaturation studies provide new insights into the contributions of structural DEPSI defects to the template-guided self-assembly of the CTH motif. While the organic scaffold drives the CTH formation, the switch defects act as temporary opponents and slow down the folding. CD spectroscopy data confirm that the switch defects contribute to the formation of a more stable CTH motif by enhancing the structural dynamics at the early stage of the folding process.
Collapse
Affiliation(s)
- Matthias Röber
- Laboratory for Organic Synthesis of Functional Systems, Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, Berlin, 12489, Germany
| | - Thomas Scheibel
- Lehrstuhl Biomaterialien, Fakultät für Ingenieurwissenschaften, Universität Bayreuth, Universitätsstraße 30, Bayreuth, D-95440, Germany
| | - Hans G Börner
- Laboratory for Organic Synthesis of Functional Systems, Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, Berlin, 12489, Germany
| |
Collapse
|
5
|
Nielsen JJ, Low SA, Ramseier NT, Hadap RV, Young NA, Wang M, Low PS. Analysis of the bone fracture targeting properties of osteotropic ligands. J Control Release 2021; 329:570-584. [PMID: 33031877 DOI: 10.1016/j.jconrel.2020.09.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 09/21/2020] [Accepted: 09/27/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE Although more than 18,000,000 fractures occur each year in the US, methods to promote fracture healing still rely primarily on fracture stabilization, with use of bone anabolic agents to accelerate fracture repair limited to rare occasions when the agent can be applied to the fracture surface. Because management of broken bones could be improved if bone anabolic agents could be continuously applied to a fracture over the entire course of the healing process, we undertook to identify strategies that would allow selective concentration of bone anabolic agents on a fracture surface following systemic administration. Moreover, because hydroxyapatite is uniquely exposed on a broken bone, we searched for molecules that would bind with high affinity and specificity for hydroxyapatite. We envisioned that by conjugating such osteotropic ligands to a bone anabolic agent, we could acquire the ability to continuously stimulate fracture healing. RESULTS Although bisphosphonates and tetracyclines were capable of localizing small amounts of peptidic payloads to fracture surfaces 2-fold over healthy bone, their specificities and capacities for drug delivery were significantly inferior to subsequent other ligands, and were therefore considered no further. In contrast, short oligopeptides of acidic amino acids were found to localize a peptide payload to a bone fracture 91.9 times more than the control untargeted peptide payload. Furthermore acidic oligopeptides were observed to be capable of targeting all classes of peptides, including hydrophobic, neutral, cationic, anionic, short oligopeptides, and long polypeptides. We further found that highly specific bone fracture targeting of multiple peptidic cargoes can be achieved by subcutaneous injection of the construct. CONCLUSIONS Using similar constructs, we anticipate that healing of bone fractures in humans that have relied on immobilization alone can be greately enhanced by continuous stimulation of bone growth using systemic administration of fracture-targeted bone anabolic agents.
Collapse
Affiliation(s)
- Jeffery J Nielsen
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America
| | - Stewart A Low
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Neal T Ramseier
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Rahul V Hadap
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Nicholas A Young
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America
| | - Mingding Wang
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Philip S Low
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America; Department of Chemistry, Purdue University, West Lafayette, IN, United States of America.
| |
Collapse
|
6
|
Hulgan SAH, Jalan AA, Li IC, Walker DR, Miller MD, Kosgei AJ, Xu W, Phillips GN, Hartgerink JD. Covalent Capture of Collagen Triple Helices Using Lysine–Aspartate and Lysine–Glutamate Pairs. Biomacromolecules 2020; 21:3772-3781. [DOI: 10.1021/acs.biomac.0c00878] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sarah A. H. Hulgan
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Abhishek A. Jalan
- Department of Biochemistry, University of Bayreuth, Bayreuth 95447, Germany
| | - I-Che Li
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Douglas R. Walker
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Mitchell D. Miller
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Abigael J. Kosgei
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Weijun Xu
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - George N. Phillips
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Jeffrey D. Hartgerink
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Bioengineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| |
Collapse
|
7
|
Kessler JL, Li Y, Fornetti J, Welm AL, Yu SM. Enrichment of Collagen Fragments Using Dimeric Collagen Hybridizing Peptide for Urinary Collagenomics. J Proteome Res 2020; 19:2926-2932. [PMID: 32500704 DOI: 10.1021/acs.jproteome.0c00055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Collagen remodeling in normal and pathologic conditions releases numerous collagen fragments into biological fluids. Although a few collagen fragments have been tested as biomarkers for disease indication, most occur at trace levels, making them nearly impossible to detect even with modern analytical tools. Here we report a new way to enrich collagen fragments that allows complete peptidomic analysis of collagen fragments in urine. Enrichment is made possible by dimeric collagen hybridizing peptides (CHPs) that bind collagen fragments originating from the triple helical regions of all collagen types with minimal sequence bias. LC-MS/MS analysis of enriched mouse urine revealed an average of 383 collagenous peptide fragments per sample (compared to 34 for unenriched sample), which could be mapped to all types of mouse collagens in the SwissProt database including FACITs and MACITs. Hierarchical clustering of a selected panel of the detected fragments separated osteopenic mice from healthy mice. The results demonstrate dimeric CHP's ability to enrich collagen fragments from biological fluid and its potential to aid peptidomics-based disease detection and biomarker discovery.
Collapse
Affiliation(s)
- Julian L Kessler
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Yang Li
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jaime Fornetti
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah 84112, United States
| | - Alana L Welm
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah 84112, United States
| | - S Michael Yu
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States.,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| |
Collapse
|
8
|
Chen EA, Lin YS. Using synthetic peptides and recombinant collagen to understand DDR–collagen interactions. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:118458. [DOI: 10.1016/j.bbamcr.2019.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/03/2019] [Accepted: 03/08/2019] [Indexed: 12/31/2022]
|
9
|
Kubyshkin V. Stabilization of the triple helix in collagen mimicking peptides. Org Biomol Chem 2019; 17:8031-8047. [PMID: 31464337 DOI: 10.1039/c9ob01646e] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Collagen mimics are peptides designed to reproduce structural features of natural collagen. A triple helix is the first element in the hierarchy of collagen folding. It is an assembly of three parallel peptide chains stabilized by packing and interchain hydrogen bonds. In this review we summarize the existing chemical approaches towards stabilization of this structure including the most recent developments. Currently proposed methods include manipulation of the amino acid composition, application of unnatural amino acid analogues, stimuli-responsive modifications, chain tethering approaches, peptide amphiphiles, modifications that target interchain interactions and more. This ability to manipulate the triple helix as a supramolecular self-assembly contributes to our understanding of the collagen folding. It also provides essential information needed to design collagen-based biomaterials of the future.
Collapse
Affiliation(s)
- Vladimir Kubyshkin
- Institute of Chemistry, University of Manitoba, Dysart Rd. 144, R3T 2N2, Winnipeg, Manitoba, Canada.
| |
Collapse
|
10
|
Li IC, Hulgan SAH, Walker DR, Farndale RW, Hartgerink JD, Jalan AA. Covalent Capture of a Heterotrimeric Collagen Helix. Org Lett 2019; 21:5480-5484. [DOI: 10.1021/acs.orglett.9b01771] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- I-Che Li
- Rice University Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| | - Sarah A. H. Hulgan
- Rice University Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| | - Douglas R. Walker
- Rice University Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| | - Richard W. Farndale
- University of Cambridge Department of Biochemistry, Downing Site, Cambridge CB2 1QW, U.K
| | - Jeffrey D. Hartgerink
- Rice University Department of Chemistry, 6100 Main Street, Houston, Texas 77005, United States
| | - Abhishek A. Jalan
- University of Bayreuth Department of Biochemistry, Universitätsstraße 30, Bayreuth 95447, Germany
| |
Collapse
|
11
|
Modulating the collagen triple helix formation by switching: Positioning effects of depsi-defects on the assembly of [Gly-Pro-Pro]7 collagen mimetic peptides. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
12
|
Abstract
Self-assembled peptide nanostructures have been increasingly exploited as functional materials for applications in biomedicine and energy. The emergent properties of these nanomaterials determine the applications for which they can be exploited. It has recently been appreciated that nanomaterials composed of multicomponent coassembled peptides often display unique emergent properties that have the potential to dramatically expand the functional utility of peptide-based materials. This review presents recent efforts in the development of multicomponent peptide assemblies. The discussion includes multicomponent assemblies derived from short low molecular weight peptides, peptide amphiphiles, coiled coil peptides, collagen, and β-sheet peptides. The design, structure, emergent properties, and applications for these multicomponent assemblies are presented in order to illustrate the potential of these formulations as sophisticated next-generation bio-inspired materials.
Collapse
Affiliation(s)
- Danielle M Raymond
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
| | | |
Collapse
|
13
|
Stawikowski MJ, Fields GB. Tricine as a convenient scaffold for the synthesis of C-terminally branched collagen-model peptides. Tetrahedron Lett 2018; 59:130-134. [PMID: 29545652 PMCID: PMC5846494 DOI: 10.1016/j.tetlet.2017.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel and convenient method for the synthesis of C-terminally branched collagen-model peptides has been achieved using tricine (N-[tris(hydroxymethyl)methyl]glycine) as a branching scaffold and 1,2-diaminoethane or 1,4-diaminobutane as a linker. The peptide sequence was incorporated directly onto the linker and scaffold during solid-phase synthesis without additional manipulations. The resulting branched triple-helical peptides exhibited comparable thermal stabilities to the parent, unbranched sequence, and served as substrates for matrix metalloproteinase-1 (MMP-1). The tricine-based branch reported herein represents the simplest synthetic scaffold for the convenient synthesis of covalently linked homomeric collagen-model triple-helical peptides.
Collapse
Affiliation(s)
- Maciej J. Stawikowski
- Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Rd, Boca Raton, FL 33431
| | - Gregg B. Fields
- Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Rd, Boca Raton, FL 33431
- The Scripps Research Institute/Scripps Florida, 130 Scripps Way, Jupiter, FL 33458
| |
Collapse
|
14
|
Van Duong H, Chau TTL, Dang NTT, Nguyen DV, Le SL, Ho TS, Vu TP, Tran TTV, Nguyen TD. Self-aggregation of water-dispersible nanocollagen helices. Biomater Sci 2018; 6:651-660. [DOI: 10.1039/c7bm01141e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The self-aggregation of water-dispersible native collagen nanofibrils has been investigated to generate hierarchical networks with structural variation from helicity to layering.
Collapse
Affiliation(s)
- Hau Van Duong
- Department of Chemistry
- Hue University of Agriculture and Forestry
- Hue University
- Hue 530000
- Vietnam
| | - Trang The Lieu Chau
- Department of Chemistry
- Hue University of Sciences
- Hue University
- Hue 530000
- Vietnam
| | - Nhan Thi Thanh Dang
- Department of Chemistry
- Hue University of Education
- Hue University
- Hue 530000
- Vietnam
| | - Duc Van Nguyen
- Faculty of Agronomy
- Hue University of Agriculture and Forestry
- Hue 530000
- Vietnam
| | - Son Lam Le
- Department of Chemistry
- Hue University of Sciences
- Hue University
- Hue 530000
- Vietnam
| | - Thang Sy Ho
- Department of Natural Resource and Environment
- Dong Thap University
- Dong Thap 870000
- Vietnam
| | - Tuyen Phi Vu
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- National Institute of Information and Communications Strategy
| | - Thi Thi Van Tran
- Department of Chemistry
- Hue University of Sciences
- Hue University
- Hue 530000
- Vietnam
| | - Thanh-Dinh Nguyen
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| |
Collapse
|
15
|
Hwang J, Huang Y, Burwell TJ, Peterson NC, Connor J, Weiss SJ, Yu SM, Li Y. In Situ Imaging of Tissue Remodeling with Collagen Hybridizing Peptides. ACS NANO 2017; 11:9825-9835. [PMID: 28877431 PMCID: PMC5656977 DOI: 10.1021/acsnano.7b03150] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 09/06/2017] [Indexed: 05/20/2023]
Abstract
Collagen, the major structural component of nearly all mammalian tissues, undergoes extensive proteolytic remodeling during developmental states and a variety of life-threatening diseases such as cancer, myocardial infarction, and fibrosis. While degraded collagen could be an important marker of tissue damage, it is difficult to detect and target using conventional tools. Here, we show that a designed peptide (collagen hybridizing peptide: CHP), which specifically hybridizes to the degraded, unfolded collagen chains, can be used to image degraded collagen and inform tissue remodeling activity in various tissues: labeled with 5-carboxyfluorescein and biotin, CHPs enabled direct localization and quantification of collagen degradation in isolated tissues within pathologic states ranging from osteoarthritis and myocardial infarction to glomerulonephritis and pulmonary fibrosis, as well as in normal tissues during developmental programs associated with embryonic bone formation and skin aging. The results indicate the general correlation between the level of collagen remodeling and the amount of denatured collagen in tissue and show that the CHP probes can be used across species and collagen types, providing a versatile tool for not only pathology and developmental biology research but also histology-based disease diagnosis, staging, and therapeutic screening. This study lays the foundation for further testing CHP as a targeting moiety for theranostic delivery in various animal models.
Collapse
Affiliation(s)
- Jeongmin Hwang
- Department
of Bioengineering and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
- 3Helix
Inc, Salt Lake City, Utah 84117, United
States
| | - Yufeng Huang
- Division
of Nephrology and Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84132, United States
| | | | | | - Jane Connor
- MedImmune
LLC, Gaithersburg, Maryland 20878, United
States
| | - Stephen J. Weiss
- Division
of Molecular Medicine & Genetics, Department of Internal Medicine,
and the Life Sciences Institute, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - S. Michael Yu
- Department
of Bioengineering and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
- 3Helix
Inc, Salt Lake City, Utah 84117, United
States
| | - Yang Li
- Department
of Bioengineering and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
- 3Helix
Inc, Salt Lake City, Utah 84117, United
States
- Phone: 801.587.0215. E-mail:
| |
Collapse
|
16
|
Urello MA, Kiick KL, Sullivan MO. ECM turnover-stimulated gene delivery through collagen-mimetic peptide-plasmid integration in collagen. Acta Biomater 2017; 62:167-178. [PMID: 28865990 PMCID: PMC5654588 DOI: 10.1016/j.actbio.2017.08.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 08/23/2017] [Accepted: 08/28/2017] [Indexed: 12/26/2022]
Abstract
Gene therapies have great potential in regenerative medicine; however, clinical translation has been inhibited by low stability and limited transfection efficiencies. Herein, we incorporate collagen-mimetic peptide (CMP)-linked polyplexes in collagen scaffolds to increase DNA stability by up to 400% and enable tailorable in vivo transgene expression at 100-fold higher levels and 10-fold longer time periods. These improvements were directly linked to a sustained interaction between collagen and polyplexes that persisted during cellular remodeling, polyplex uptake, and intracellular trafficking. Specifically, incorporation of CMPs into polyethylenimine (PEI) polyplexes preserved serum-exposed polyplex-collagen activity over a period of 14days, with 4 orders-of-magnitude more intact DNA present in CMP-modified polyplex-collagen relative to unmodified polyplex-collagen after a 10day incubation under cell culture conditions. CMP-modification also altered endocytic uptake, as indicated by gene silencing studies showing a nearly 50% decrease in transgene expression in response to caveolin-1 silencing in modified samples versus only 30% in unmodified samples. Furthermore, cellular internalization studies demonstrated that polyplex-collagen association persisted within cells in CMP polyplexes, but not in unmodified polyplexes, suggesting that CMP linkage to collagen regulates intracellular transport. Moreover, experiments in an in vivo repair model showed that CMP modification enabled tailoring of transgene expression from 4 to 25days over a range of concentrations. Overall, these findings demonstrate that CMP decoration provides substantial improvements in gene retention, altered release kinetics, improved serum-stability, and improved gene activity in vivo. This versatile technique has great potential for multiple applications in regenerative medicine. STATEMENT OF SIGNIFICANCE In this work, we demonstrate a novel approach for stably integrating DNA into collagen scaffolds to exploit the natural process of collagen remodelling for high efficiency non-viral gene delivery. The incorporation of CMPs into DNA polyplexes, coupled with the innate affinity between CMPs and collagen, not only permitted improved control over polyplex retention and release, but also provided a series of substantial and highly unique benefits via the stable and persistent linkage between CMP-polyplexes and collagen fragments. Specifically, CMP-modification of polyplexes was demonstrated to (i) control release for nearly a month, (ii) improve vector stability under physiological-like conditions, and (iii) provide ligands able to efficiently transfer genes via endocytic collagen pathways. These unique properties overcome key barriers inhibiting non-viral gene therapy.
Collapse
Affiliation(s)
- Morgan A Urello
- Dept. of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Kristi L Kiick
- Dept. of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA.
| | - Millicent O Sullivan
- Dept. of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA.
| |
Collapse
|
17
|
Hwang J, San BH, Turner NJ, White LJ, Faulk DM, Badylak SF, Li Y, Yu SM. Molecular assessment of collagen denaturation in decellularized tissues using a collagen hybridizing peptide. Acta Biomater 2017; 53:268-278. [PMID: 28161576 PMCID: PMC5462463 DOI: 10.1016/j.actbio.2017.01.079] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/20/2017] [Accepted: 01/30/2017] [Indexed: 11/23/2022]
Abstract
Decellularized extracellular matrix (ECM) derived from tissues and organs are emerging as important scaffold materials for regenerative medicine. Many believe that preservation of the native ECM structure during decellularization is highly desirable. However, because effective techniques to assess the structural damage in ECM are lacking, the disruptive effects of a decellularization method and the impact of the associated structural damage upon the scaffold's regenerative capacity are often debated. Using a novel collagen hybridizing peptide (CHP) that specifically binds to unfolded collagen chains, we investigated the molecular denaturation of collagen in the ECM decellularized by four commonly used cell-removing detergents: sodium dodecyl sulfate (SDS), 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS), sodium deoxycholate (SD), and Triton X-100. Staining of the detergent-treated porcine ligament and urinary bladder matrix with carboxyfluorescein-labeled CHP demonstrated that SDS and Triton X-100 denature the triple helical collagen molecule while CHAPS and SD do not, although second harmonic generation imaging and transmission electron microscopy (TEM) revealed that all four detergents disrupt collagen fibrils. Our findings from the CHP staining were further confirmed by the circular dichroism spectra of intact triple helical collagen molecules in CHAPS and SD solutions, and the TEM images of CHP-conjugated gold nanoparticles binding only to the SDS and Triton X-100 treated collagen fibrils. CHP is a powerful new tool for direct and reliable measurement of denatured collagen molecules in decellularized tissues. It is expected to have wide applications in the development and standardization of the tissue/organ decellularization technology. STATEMENT OF SIGNIFICANCE Preservation of the native ECM structure in decellularized tissues is highly desirable, since denaturation of ECM molecules (e.g., collagen) during decellularization can strongly influence the cellular response. Unfortunately, conventional techniques (SEM, SHG) are not conducive to identifying denatured collagen molecules in tissues. We demonstrate the first investigation into the molecular denaturation of collagen in decellularized ECM enabled by a novel Collagen Hybridizing Peptide (CHP) that specifically binds to unfolded collagen chains. We show that SDS and Triton X-100 denature collagen molecules while CHAPS and SD cannot. Such detection has been nearly impossible with other existing techniques. The CHP technique will advance our understanding about the effect of the cell-removing process on ECM, and lead to development of the decellularization technology.
Collapse
Affiliation(s)
- Jeongmin Hwang
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Boi Hoa San
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Neill J Turner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Lisa J White
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
| | - Denver M Faulk
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Stephen F Badylak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Yang Li
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA.
| | - S Michael Yu
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| |
Collapse
|
18
|
San BH, Li Y, Tarbet EB, Yu SM. Nanoparticle Assembly and Gelatin Binding Mediated by Triple Helical Collagen Mimetic Peptide. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19907-19915. [PMID: 27403657 PMCID: PMC5453869 DOI: 10.1021/acsami.6b05707] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Peptide-conjugated nanoparticles (NPs) have promising potential for applications in biosensing, diagnosis, and therapeutics because of their appropriate size, unique self-assembly, and specific substrate-binding properties. However, controlled assembly and selective target binding are difficult to achieve with simple peptides on NP surfaces because high surface energy makes NPs prone to self-aggregate and adhere nonspecifically. Here, we report the self-assembly and gelatin binding properties of collagen mimetic peptide (CMP) conjugated gold NPs (CMP-NPs). We show that the orientation of CMPs displayed on the NP surface can control NP assembly either by promoting or hindering triple helical folding between CMPs of neighboring NPs. We also show that CMP-NPs can specifically bind to denatured collagen by forming triple-helical hybrids between denatured collagen strands and CMPs, demonstrating their potential use for detection and selective removal of gelatin from protein mixtures. CMP conjugated NPs offer a simple and effective method for NP assembly and for targeting denatured collagens with high specificity. Therefore, they may lead to new types of functional nanomaterials for detection and study of denatured collagen associated with diseases characterized by high levels of collagen degradation.
Collapse
Affiliation(s)
- Boi Hoa San
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Yang Li
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - E. Bart Tarbet
- Institute for Antiviral Research, Utah State University, Logan, Utah 84322, United States
| | - S. Michael Yu
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, United States
| |
Collapse
|
19
|
Urello MA, Kiick KL, Sullivan MO. Integration of growth factor gene delivery with collagen-triggered wound repair cascades using collagen-mimetic peptides. Bioeng Transl Med 2016; 1:207-219. [PMID: 27981245 PMCID: PMC5125401 DOI: 10.1002/btm2.10037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 12/11/2022] Open
Abstract
Growth factors (GFs) play vital roles in wound repair. Many GF therapies have reached clinical trials, but success has been hindered by safety concerns and a lack of efficacy. Previously, we presented an approach to produce protein factors in wound beds through localized gene delivery mediated by biomimetic peptides. Modification of polyethylenimine (PEI) DNA polyplexes with collagen-mimetic peptides (CMPs) enabled tailoring of polyplex release/retention and improved gene transfer activity in a cell-responsive manner. In this work, CMP-mediated delivery from collagen was shown to improve expression of platelet-derived growth factor-BB (PDGF-BB) and promote a diverse range of cellular processes associated with wound healing, including proliferation, extracellular matrix production, and chemotaxis. Collagens were pre-exposed to physiologically-simulating conditions (complete media, 37°C) for days to weeks prior to cell seeding to simulate the environment within typical wound dressings. In cell proliferation studies, significant increases in cell counts were demonstrated in collagen gels containing CMP-modified polyplex versus unmodified polyplex, and these effects became most pronounced following prolonged preincubation periods of greater than a week. Collagen containing CMP-modified polyplexes also induced a twofold increase in gel contraction as well as enhanced directionality and migratory activity in response to cell-secreted PDGF-BB gradients. While these PDGF-BB-triggered behaviors were observed in collagens containing unmodified polyplexes, the responses withstood much longer preincubation periods in CMP-modified polyplex samples (10 days vs. <5 days). Furthermore, enhanced closure rates in an in vitro wound model suggested that CMP-based PDGF-BB delivery may have utility in actual wound repair and other regenerative medicine applications.
Collapse
Affiliation(s)
- Morgan A. Urello
- Dept. of Chemical and Biomolecular EngineeringUniversity of DelawareNewarkDE19716
| | - Kristi L. Kiick
- Dept. of Material Science and EngineeringUniversity of DelawareNewarkDE19716
| | | |
Collapse
|
20
|
Chiang CH, Horng JC. Cation-π Interaction Induced Folding of AAB-Type Collagen Heterotrimers. J Phys Chem B 2016; 120:1205-11. [PMID: 26821230 DOI: 10.1021/acs.jpcb.5b11189] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Collagen is the most predominant component of the extracellular matrix. Natural collagens consist of all identical (AAA, homotrimer), two different (AAB, heterotrimer), or three different (ABC, heterotrimer) peptide chains. Many natural collagens are either AAB- or ABC-type heterotrimers, making heterotrimeric helices better mimics for studying collagen structures in nature. We prepared collagen-mimetic peptides containing cationic (Arg) or aromatic (Phe, Tyr) residues to explore collagen heterotrimer folding via cation-π interactions. Circular dichroism, differential scanning calorimetry, and nuclear magnetic resonance (NMR) measurements showed that the interchain cation-π interactions between cationic and aromatic peptides could induce AAB-type heterotrimer formation. By controlling the mixing molar ratios of cationic and aromatic peptides in solution, we could obtain the heterotrimers with various compositions. We demonstrate the effectiveness of cation-π interactions as a force to fold collagen heterotrimers.
Collapse
Affiliation(s)
- Chu-Harn Chiang
- Department of Chemistry, National Tsing Hua University , 101 Sec. 2 Kuang-Fu Road, Hsinchu, Taiwan 30013, R.O.C
| | - Jia-Cherng Horng
- Department of Chemistry, National Tsing Hua University , 101 Sec. 2 Kuang-Fu Road, Hsinchu, Taiwan 30013, R.O.C.,Frontier Research Center on Fundamental and Applied Science of Matters, National Tsing Hua University , 101 Sec. 2 Kuang-Fu Road, Hsinchu, Taiwan 30013, R.O.C
| |
Collapse
|
21
|
Li Y, San BH, Kessler JL, Kim JH, Xu Q, Hanes J, Yu SM. Non-covalent photo-patterning of gelatin matrices using caged collagen mimetic peptides. Macromol Biosci 2015; 15:52-62. [PMID: 25476588 PMCID: PMC4430332 DOI: 10.1002/mabi.201400436] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/04/2014] [Indexed: 01/13/2023]
Abstract
To address the downside of conventional photo-patterning which can alter the chemical composition of protein scaffolds, we developed a non-covalent photo-patterning strategy for gelatin (denatured collagen) hydrogels that utilizes UV activated triple helical hybridization of caged collagen mimetic peptide (caged CMP). Here we present 2D and 3D photo-patterning of gelatin hydrogels enabled by the caged CMP derivatives, as well as creation of concentration gradients of CMPs. CMP's specificity for binding to gelatin allows patterning of almost any synthetic or natural gelatin-containing matrix, such as gelatin-methacrylate hydrogels and corneal tissues. This is a radically new tool for immobilizing drugs to natural tissues and for functionalizing scaffolds for complex tissue formation.
Collapse
Affiliation(s)
- Yang Li
- Department of Bioengineering, University of Utah, 36 S. Wasatch Drive, 3100 SMBB, Salt Lake City, Utah, 84112, USA
| | | | | | | | | | | | | |
Collapse
|
22
|
Hume J, Sun J, Jacquet R, Renfrew PD, Martin JA, Bonneau R, Gilchrist ML, Montclare JK. Engineered Coiled-Coil Protein Microfibers. Biomacromolecules 2014; 15:3503-10. [DOI: 10.1021/bm5004948] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jasmin Hume
- Department
of Chemical and Biomolecular Engineering, NYU Polytechnic School of Engineering, Brooklyn, New York 11201, United States
| | - Jennifer Sun
- Department
of Chemical and Biomolecular Engineering, NYU Polytechnic School of Engineering, Brooklyn, New York 11201, United States
| | - Rudy Jacquet
- Department
of Chemical and Biomolecular Engineering, NYU Polytechnic School of Engineering, Brooklyn, New York 11201, United States
| | - P. Douglas Renfrew
- Center
for Genomics and Systems Biology, Department of Biology, New York University New York, New York 10003, United States
| | - Jesse A. Martin
- Departments
of Chemical Engineering and Biomedical Engineering, The City College of the City University of New York, New York, New York 10031, United States
| | - Richard Bonneau
- Center
for Genomics and Systems Biology, Department of Biology, New York University New York, New York 10003, United States
| | - M. Lane Gilchrist
- Departments
of Chemical Engineering and Biomedical Engineering, The City College of the City University of New York, New York, New York 10031, United States
| | - Jin Kim Montclare
- Department
of Chemical and Biomolecular Engineering, NYU Polytechnic School of Engineering, Brooklyn, New York 11201, United States
| |
Collapse
|
23
|
Abstract
Degradation of fibrillar collagen is critical for tissue maintenance. Yet, understanding collagen catabolism has been challenging partly due to a lack of atomistic picture for its load-dependent conformational dynamics, as both mechanical load and local unfolding of collagen affect its cleavage by matrix metalloproteinase (MMP). We use molecular dynamics simulation to find the most cleavage-prone arrangement of α chains in a collagen triple helix and find amino acids that modulate stability of the MMP cleavage domain depending on the chain registry within the molecule. The native-like state is mechanically inhomogeneous, where the cleavage site interfaces a stiff region and a locally unfolded and flexible region along the molecule. In contrast, a triple helix made of the stable glycine-proline-hydroxyproline motif is uniformly flexible and is dynamically stabilized by short-lived, low-occupancy hydrogen bonds. These results provide an atomistic basis for the mechanics, conformation, and stability of collagen that affect catabolism.
Collapse
Affiliation(s)
- Xiaojing Teng
- Department of Biomedical Engineering and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | | |
Collapse
|
24
|
Li Y, Foss CA, Pomper MG, Yu SM. Imaging denatured collagen strands in vivo and ex vivo via photo-triggered hybridization of caged collagen mimetic peptides. J Vis Exp 2014:e51052. [PMID: 24513868 PMCID: PMC4396875 DOI: 10.3791/51052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Collagen is a major structural component of the extracellular matrix that supports tissue formation and maintenance. Although collagen remodeling is an integral part of normal tissue renewal, excessive amount of remodeling activity is involved in tumors, arthritis, and many other pathological conditions. During collagen remodeling, the triple helical structure of collagen molecules is disrupted by proteases in the extracellular environment. In addition, collagens present in many histological tissue samples are partially denatured by the fixation and preservation processes. Therefore, these denatured collagen strands can serve as effective targets for biological imaging. We previously developed a caged collagen mimetic peptide (CMP) that can be photo-triggered to hybridize with denatured collagen strands by forming triple helical structure, which is unique to collagens. The overall goals of this procedure are i) to image denatured collagen strands resulting from normal remodeling activities in vivo, and ii) to visualize collagens in ex vivo tissue sections using the photo-triggered caged CMPs. To achieve effective hybridization and successful in vivo and ex vivo imaging, fluorescently labeled caged CMPs are either photo-activated immediately before intravenous injection, or are directly activated on tissue sections. Normal skeletal collagen remolding in nude mice and collagens in prefixed mouse cornea tissue sections are imaged in this procedure. The imaging method based on the CMP-collagen hybridization technology presented here could lead to deeper understanding of the tissue remodeling process, as well as allow development of new diagnostics for diseases associated with high collagen remodeling activity.
Collapse
Affiliation(s)
- Yang Li
- Department of Bioengineering, University of Utah
| | | | | | | |
Collapse
|
25
|
Weiher F, Schatz M, Steinem C, Geyer A. Silica Precipitation by Synthetic Minicollagens. Biomacromolecules 2013; 14:683-7. [DOI: 10.1021/bm301737m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Felix Weiher
- Faculty of
Chemistry, Philipps University Marburg,
Hans-Meerwein-Straße,
35032 Marburg, Germany
| | - Michaela Schatz
- Institute of Organic and Biomolecular
Chemistry, University of Göttingen, Tammannstraße 2, 37077
Göttingen, Germany
| | - Claudia Steinem
- Institute of Organic and Biomolecular
Chemistry, University of Göttingen, Tammannstraße 2, 37077
Göttingen, Germany
| | - Armin Geyer
- Faculty of
Chemistry, Philipps University Marburg,
Hans-Meerwein-Straße,
35032 Marburg, Germany
| |
Collapse
|
26
|
Li Y, Ho D, Meng H, Chan TR, An B, Yu H, Brodsky B, Jun AS, Michael Yu S. Direct detection of collagenous proteins by fluorescently labeled collagen mimetic peptides. Bioconjug Chem 2013; 24:9-16. [PMID: 23253177 DOI: 10.1021/bc3005842] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Although fibrous collagens are major structural components of extracellular matrix in mammals, collagen overproduction is associated with many human diseases including cancers and fibrosis. Collagen is typically identified in biomedical research by Western blot and immunohistochemistry; however, anticollagen antibodies employed in these analyses are difficult to prepare and their affinities to collagen can diminish if collagen becomes denatured during analyses. Previously, we discovered that single-stranded collagen mimetic peptides [CMPs, sequence: (GlyProHyp)(9)] can bind to denatured collagen chains by triple helix hybridization. Here, we present collagen-specific staining methods using simple CMPs conjugated to common fluorophores (e.g., carboxyfluorescein), which allow direct detection of collagens and collagen-like proteins in SDS-PAGE and in various mammalian tissue sections. By directly staining SDS-PAGE gels with fluorescently labeled CMPs, both intact (type I, II, and IV) and MMP-1 cleaved collagen (type I) chains as well as complement factor C1q were detected. Collagen bands containing as little as 5 ng were optically visualized, while no staining was observed for fibronectin, laminin, and a collection of proteins from mammalian cell lysate. The CMP was unable to stain collagen-like bacterial protein, which contains numerous charged amino acids that are believed to stabilize triple helix in place of Hyp. We also show that fluorescently labeled CMPs can specifically visualize collagens in fixed tissue sections (e.g., skin, cornea, and bone) more effectively than anticollagen I antibody, and allow facile identification of pathologic conditions in fibrotic liver tissues.
Collapse
Affiliation(s)
- Yang Li
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
An B, DesRochers TM, Qin G, Xia X, Thiagarajan G, Brodsky B, Kaplan DL. The influence of specific binding of collagen-silk chimeras to silk biomaterials on hMSC behavior. Biomaterials 2012; 34:402-12. [PMID: 23088839 DOI: 10.1016/j.biomaterials.2012.09.085] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 09/20/2012] [Indexed: 02/07/2023]
Abstract
Collagen-like proteins in the bacteria Streptococcus pyogenes adopt a triple-helix structure with a thermal stability similar to that of animal collagens, can be expressed in high yield in Escherichia coli and can be easily modified through molecular biology techniques. However, potential applications for such recombinant collagens are limited by their lack of higher order structure to achieve the physical properties needed for most biomaterials. To overcome this problem, the S. pyogenes collagen domain was fused to a repetitive Bombyx mori silk consensus sequence, as a strategy to direct specific non-covalent binding onto solid silk materials whose superior stability, mechanical and material properties have been previously established. This approach resulted in the successful binding of these new collagen-silk chimeric proteins to silk films and porous scaffolds, and the binding affinity could be controlled by varying the number of repeats in the silk sequence. To explore the potential of collagen-silk chimera for regulating biological activity, integrin (Int) and fibronectin (Fn) binding sequences from mammalian collagens were introduced into the bacterial collagen domain. The attachment of bioactive collagen-silk chimeras to solid silk biomaterials promoted hMSC spreading and proliferation substantially in comparison to the controls. The ability to combine the biomaterial features of silk with the biological activities of collagen allowed more rapid cell interactions with silk-based biomaterials, improved regulation of stem cell growth and differentiation, as well as the formation of artificial extracellular matrices useful for tissue engineering applications.
Collapse
Affiliation(s)
- Bo An
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | | | | | | | | | | | | |
Collapse
|
28
|
Targeting collagen strands by photo-triggered triple-helix hybridization. Proc Natl Acad Sci U S A 2012; 109:14767-72. [PMID: 22927373 DOI: 10.1073/pnas.1209721109] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Collagen remodeling is an integral part of tissue development, maintenance, and regeneration, but excessive remodeling is associated with various pathologic conditions. The ability to target collagens undergoing remodeling could lead to new diagnostics and therapeutics as well as applications in regenerative medicine; however, such collagens are often degraded and denatured, making them difficult to target with conventional approaches. Here, we present caged collagen mimetic peptides (CMPs) that can be photo-triggered to fold into triple helix and bind to collagens denatured by heat or by matrix metalloproteinase (MMP) digestion. Peptide-binding assays indicate that the binding is primarily driven by stereo-selective triple-helical hybridization between monomeric CMPs of high triple-helical propensity and denatured collagen strands. Photo-triggered hybridization allows specific staining of collagen chains in protein gels as well as photo-patterning of collagen and gelatin substrates. In vivo experiments demonstrate that systemically delivered CMPs can bind to collagens in bones, as well as prominently in articular cartilages and tumors characterized by high MMP activity. We further show that CMP-based probes can detect abnormal bone growth activity in a mouse model of Marfan syndrome. This is an entirely new way to target the microenvironment of abnormal tissues and could lead to new opportunities for management of numerous pathologic conditions associated with collagen remodeling and high MMP activity.
Collapse
|
29
|
Wei F, Fallas JA, Hartgerink JD. Sequence Position and Side Chain Length Dependence of Charge Pair Interactions in Collagen Triple Helices. Macromol Rapid Commun 2012; 33:1445-52. [DOI: 10.1002/marc.201200221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 06/04/2012] [Indexed: 12/15/2022]
|
30
|
Stahl PJ, Yu SM. Encoding Cell-Instructive Cues to PEG-Based Hydrogels via Triple Helical Peptide Assembly. SOFT MATTER 2012; 8:10409-10418. [PMID: 23908674 PMCID: PMC3727667 DOI: 10.1039/c2sm25903f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Effective synthetic tissue engineering scaffolds mimic the structure and composition of natural extracellular matrix (ECM) to promote optimal cellular adhesion, proliferation, and differentiation. Among many proteins of the ECM, collagen and fibronectin are known to play a key role in the scaffold's structural integrity as well as its ability to support cell adhesion. Here, we present photocrosslinked poly(ethylene glycol) diacrylate (PEGDA) hydrogels displaying collagen mimetic peptides (CMPs) that can be further conjugated to bioactive molecules via CMP-CMP triple helix association. Pre-formed PEGDA-CMP hydrogels can be encoded with varying concentration of cell-signaling CMP-RGD peptides similar to cell adhesive fibronectin decorating the collagen fibrous network by non-covalent binding. Furthermore, the triple helix mediated encoding allows facile generation of spatial gradients and patterns of cell-instructive cues across the cell scaffold that simulate distribution of insoluble factors in the natural ECM.
Collapse
Affiliation(s)
- Patrick J. Stahl
- Department of Materials Science & Engineering, The Johns Hopkins University, Maryland Hall 3400 N. Charles St., Baltimore, MD 21218, USA
- Institute for NanoBioTechnology, The Johns Hopkins University, Maryland Hall 3400 N. Charles St., Baltimore, MD 21218, USA
| | - S. Michael Yu
- Department of Materials Science & Engineering, The Johns Hopkins University, Maryland Hall 3400 N. Charles St., Baltimore, MD 21218, USA
- Institute for NanoBioTechnology, The Johns Hopkins University, Maryland Hall 3400 N. Charles St., Baltimore, MD 21218, USA
| |
Collapse
|
31
|
Yu SM, Li Y, Kim D. Collagen Mimetic Peptides: Progress Towards Functional Applications. SOFT MATTER 2011; 7:7927-7938. [PMID: 26316880 PMCID: PMC4548921 DOI: 10.1039/c1sm05329a] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Traditionally, collagen mimetic peptides (CMPs) have been used for elucidating the structure of the collagen triple helix and the factors responsible for its stabilization. The wealth of fundamental knowledge on collagen structure and cell-extracellular matrix (ECM) interactions accumulated over the past decades has led to a recent burst of research exploring the potential of CMPs to recreate the higher order assembly and biological function of natural collagens for biomedical applications. Although a large portion of such research is still at an early stage, the collagen triple helix has become a promising structural motif for engineering self-assembled, hierarchical constructs similar to natural tissue scaffolds which are expected to exhibit unique or enhanced biological activities. This paper reviews recent progress in the field of collagen mimetic peptides that bears both direct and indirect implications to engineering collagen-like materials for potential biomedical use. Various CMPs and collagen-like proteins that mimic either structural or functional characteristics of natural collagens are discussed with particular emphasis on providing helpful information to bioengineers and biomaterials scientists interested in collagen engineering.
Collapse
Affiliation(s)
- S Michael Yu
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218 ; Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218
| | - Yang Li
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218
| | - Daniel Kim
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218
| |
Collapse
|
32
|
Lebruin LT, Banerjee S, O'Rourke BD, Case MA. Metal ion-assembled micro-collagen heterotrimers. Biopolymers 2011; 95:792-800. [PMID: 21590759 DOI: 10.1002/bip.21678] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 05/05/2011] [Accepted: 05/07/2011] [Indexed: 11/09/2022]
Abstract
Collagen mimetic peptides (CMPs) provide critical insight into the assembly, stability, and structure of the triple helical collagen protein. The majority of natural fibrous collagens are aab or abc heterotrimers, yet few examples of heterotrimeric CMPs have been reported. Previously, CMP heterotrimers have only been accessible by total syntheses or by introducing complementary interstrand electrostatic or steric interactions. Here, we describe an abc CMP heterotrimer in which each contributing CMP consists of only three amino acids: glycine, proline and 4-hydroxyproline. Assembly of the heterotrimeric triple helix is directed by a combination of metal-ion coordination to set the relative register of the CMPs, and minimization of valence frustration to direct heterotrimerization. Assembly of the four-component mixture is facile and extremely rapid, and equilibration to the abc heterotrimer occurs within a few hours at modestly elevated temperatures. The melting temperatures of the metal-assembled collagen trimers are higher by some 30°C than the apopeptide assemblies. Two iterations of the design are described, and the outcomes suggest possibilities for designing self-assembling abc and abb heterotrimers.
Collapse
|
33
|
O'Leary LER, Fallas JA, Hartgerink JD. Positive and negative design leads to compositional control in AAB collagen heterotrimers. J Am Chem Soc 2011; 133:5432-43. [PMID: 21428435 DOI: 10.1021/ja111239r] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Although collagen is the most abundant protein in the human body and has at least 28 types, research involving collagen mimetic systems only recently began to consider the innate ability of collagen to control helix composition and register. Collagen triple helices can be homotrimeric or heterotrimeric, and while some types of natural collagen form only one specific composition of helix, others can form multiple compositions. It is critical to fully understand and, if possible, reproduce the control that native collagen has on helix composition and register. In this Article, we utilize both positive and negative design for the assembly of specific AAB heterotrimers using charged amino acids to form intrahelix electrostatic interactions, which promote heterotrimer formation and simultaneously discourage homotrimers. Homotrimers are further discouraged by reducing hydroxyproline content, which would otherwise lead to nonspecific promotion of triple helix formation. We combine peptides in a 2:1 ratio in which the more abundant peptide has a charge 1/2 and opposite of the less abundant peptide, which can result in the formation of a zwitterionically neutral AAB heterotrimer. Using this approach, we are able to design collagen mimetic systems with full control over the composition of the resulting triple helix. All previous reports on synthetic collagen heterotrimers have shown mixed populations with respect to composition due to varying amounts of residual homotrimers. Our results yield a greater understanding of the self-assembly of collagenous sequences as well as provide a novel design scheme, both positive and negative, for the synthesis of extracellular matrix mimetics.
Collapse
Affiliation(s)
- Lesley E R O'Leary
- Department of Chemistry, Rice University, 6100 Main Street, Mail Stop 602, Houston, Texas 77005, USA
| | | | | |
Collapse
|