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Tian Y, Zhao L, Gui Z, Liu S, Liu C, Yu T, Zhang L. PI3K/AKT signaling activates HIF1α to modulate the biological effects of invasive breast cancer with microcalcification. NPJ Breast Cancer 2023; 9:93. [PMID: 37957150 PMCID: PMC10643473 DOI: 10.1038/s41523-023-00598-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023] Open
Abstract
Microcalcification (MC) is a valuable diagnostic indicator of breast cancer, and it is reported to be associated with increased tumor aggressiveness and poor prognosis. Nevertheless, the exact potential molecular mechanism is not completely understood. Here, we find that the mineralized invasive breast cancer (IBC) cells not only increased their proliferation and migration, but also showed the characteristic of doxorubicin resistance. The PI3K/AKT signaling pathway is associated with the generation of calcification in IBC, and it activates the transcription and translation of its downstream hypoxia-inducible factor 1α (HIF1α). Knockdown of HIF1α protein significantly downregulated cell proliferation and migration while calcification persists. Meanwhile, calcified breast cancer cells restored sensitivity to doxorubicin because of suppressed HIF1α expression. In addition, we provide initial data on the underlying value of HIF1α as a biomarker of doxorubicin resistance. These findings provide a new direction for exploring microcalcifications in IBC.
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Affiliation(s)
- Yao Tian
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Lu Zhao
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Zhengwei Gui
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Shiyang Liu
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Chenguang Liu
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Tianyao Yu
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China
| | - Lin Zhang
- Department of Thyroid and Breast Surgery, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang Avenue, Qiaokou District, Wuhan, Hubei Province, 430030, China.
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2
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Biomedical applications of solid-binding peptides and proteins. Mater Today Bio 2023; 19:100580. [PMID: 36846310 PMCID: PMC9950531 DOI: 10.1016/j.mtbio.2023.100580] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
Over the past decades, solid-binding peptides (SBPs) have found multiple applications in materials science. In non-covalent surface modification strategies, solid-binding peptides are a simple and versatile tool for the immobilization of biomolecules on a vast variety of solid surfaces. Especially in physiological environments, SBPs can increase the biocompatibility of hybrid materials and offer tunable properties for the display of biomolecules with minimal impact on their functionality. All these features make SBPs attractive for the manufacturing of bioinspired materials in diagnostic and therapeutic applications. In particular, biomedical applications such as drug delivery, biosensing, and regenerative therapies have benefited from the introduction of SBPs. Here, we review recent literature on the use of solid-binding peptides and solid-binding proteins in biomedical applications. We focus on applications where modulating the interactions between solid materials and biomolecules is crucial. In this review, we describe solid-binding peptides and proteins, providing background on sequence design and binding mechanism. We then discuss their application on materials relevant for biomedicine (calcium phosphates, silicates, ice crystals, metals, plastics, and graphene). Although the limited characterization of SBPs still represents a challenge for their design and widespread application, our review shows that SBP-mediated bioconjugation can be easily introduced into complex designs and on nanomaterials with very different surface chemistries.
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3
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Novel bidentate β-glutamic acid-based bone-targeting agents for in vivo bone imaging. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Pereira AR, Lipphaus A, Ergin M, Salehi S, Gehweiler D, Rudert M, Hansmann J, Herrmann M. Modeling of the Human Bone Environment: Mechanical Stimuli Guide Mesenchymal Stem Cell-Extracellular Matrix Interactions. MATERIALS (BASEL, SWITZERLAND) 2021; 14:4431. [PMID: 34442954 PMCID: PMC8398413 DOI: 10.3390/ma14164431] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/02/2021] [Accepted: 08/03/2021] [Indexed: 02/06/2023]
Abstract
In bone tissue engineering, the design of in vitro models able to recreate both the chemical composition, the structural architecture, and the overall mechanical environment of the native tissue is still often neglected. In this study, we apply a bioreactor system where human bone-marrow hMSCs are seeded in human femoral head-derived decellularized bone scaffolds and subjected to dynamic culture, i.e., shear stress induced by continuous cell culture medium perfusion at 1.7 mL/min flow rate and compressive stress by 10% uniaxial load at 1 Hz for 1 h per day. In silico modeling revealed that continuous medium flow generates a mean shear stress of 8.5 mPa sensed by hMSCs seeded on 3D bone scaffolds. Experimentally, both dynamic conditions improved cell repopulation within the scaffold and boosted ECM production compared with static controls. Early response of hMSCs to mechanical stimuli comprises evident cell shape changes and stronger integrin-mediated adhesion to the matrix. Stress-induced Col6 and SPP1 gene expression suggests an early hMSC commitment towards osteogenic lineage independent of Runx2 signaling. This study provides a foundation for exploring the early effects of external mechanical stimuli on hMSC behavior in a biologically meaningful in vitro environment, opening new opportunities to study bone development, remodeling, and pathologies.
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Affiliation(s)
- Ana Rita Pereira
- IZKF Group Tissue Regeneration in Musculoskeletal Diseases, University Hospital Wuerzburg, 97070 Wuerzburg, Germany; (A.R.P.); (M.E.)
- Bernhard-Heine-Centrum for Locomotion Research, University of Wuerzburg, 97074 Wuerzburg, Germany
| | - Andreas Lipphaus
- Biomechanics Research Group, Ruhr-University Bochum, 44801 Bochum, Germany;
| | - Mert Ergin
- IZKF Group Tissue Regeneration in Musculoskeletal Diseases, University Hospital Wuerzburg, 97070 Wuerzburg, Germany; (A.R.P.); (M.E.)
- Department of Biomaterials, Center of Energy Technology und Materials Science (TAO), University of Bayreuth, 95447 Bayreuth, Germany;
| | - Sahar Salehi
- Department of Biomaterials, Center of Energy Technology und Materials Science (TAO), University of Bayreuth, 95447 Bayreuth, Germany;
| | | | - Maximilian Rudert
- Department of Orthopedic Surgery, Koenig-Ludwig-Haus, University of Wuerzburg, 97074 Wuerzburg, Germany;
| | - Jan Hansmann
- Fraunhofer Institute for Silicate Research, Translational Center for Regenerative Therapies, 97082 Wuerzburg, Germany;
| | - Marietta Herrmann
- IZKF Group Tissue Regeneration in Musculoskeletal Diseases, University Hospital Wuerzburg, 97070 Wuerzburg, Germany; (A.R.P.); (M.E.)
- Bernhard-Heine-Centrum for Locomotion Research, University of Wuerzburg, 97074 Wuerzburg, Germany
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5
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Zhang F, Cheng Z, Ding C, Li J. Functional biomedical materials derived from proteins in the acquired salivary pellicle. J Mater Chem B 2021; 9:6507-6520. [PMID: 34304263 DOI: 10.1039/d1tb01121a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the oral environment, the acquired salivary pellicle (ASP) on the tooth surface comprises proteins, glycoproteins, carbohydrates, and lipids. The ASP can specifically and rapidly adsorb on the enamel surface to provide effective lubrication, protection, hydration, and remineralisation, as well as be recognised by various bacteria to form a microbial biofilm (plaque). The involved proteins, particularly various phosphoproteins such as statherins, histatins, and proline-rich proteins, are vital to their specific functions. This review first describes the relationship between the biological functions of these proteins and their structures. Subsequently, recent advances in functional biomedical materials derived from these proteins are reviewed in terms of dental/bone therapeutic materials, antibacterial materials, tissue engineering materials, and coatings for medical devices. Finally, perspectives and challenges regarding the rational design and biomedical applications of ASP-derived materials are discussed.
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Affiliation(s)
- Fan Zhang
- Physical Examination Center, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
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Steinbauer P, Rohatschek A, Andriotis O, Bouropoulos N, Liska R, Thurner PJ, Baudis S. Single-Molecule Force Spectroscopy Reveals Adhesion-by-Demand in Statherin at the Protein-Hydroxyapatite Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13292-13300. [PMID: 33118809 PMCID: PMC7660943 DOI: 10.1021/acs.langmuir.0c02325] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Achieving strong adhesion in wet environments remains a technological challenge in biomedical applications demanding biocompatibility. Attention for adhesive motifs meeting such demands has largely been focused on marine organisms. However, bioadhesion to inorganic surfaces is also present in the human body, in the hard tissues of teeth and bones, and is mediated through serines (S). The specific amino acid sequence DpSpSEEKC has been previously suggested to be responsible for the strong binding abilities of the protein statherin to hydroxyapatite, where pS denotes phosphorylated serine. Notably, similar sequences are present in the non-collagenous bone protein osteopontin (OPN) and the mussel foot protein 5 (Mefp5). OPN has previously been shown to promote fracture toughness and physiological damage formation. Here, we investigated the adhesion strength of the motif D(pS)(pS)EEKC on substrates of hydroxyapatite, TiO2, and mica using atomic force microscopy (AFM) single-molecule force spectroscopy (SMFS). Specifically, we investigated the dependence of adhesion force on phosphorylation of serines by comparing findings with the unphosphorylated variant DSSEEKC. Our results show that high adhesion forces of over 1 nN on hydroxyapatite and on TiO2 are only present for the phosphorylated variant D(pS)(pS)EEKC. This warrants further exploitation of this motif or similar residues in technological applications. Further, the dependence of adhesion force on phosphorylation suggests that biological systems potentially employ an adhesion-by-demand mechanism via expression of enzymes that up- or down-regulate phosphorylation, to increase or decrease adhesion forces, respectively.
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Affiliation(s)
- Patrick Steinbauer
- Christian
Doppler Laboratory for Advanced Polymers for Biomaterials and 3D Printing, TU Wien, Vienna 1060, Austria
- Institute
of Applied Synthetic Chemistry, Division of Macromolecular Chemistry, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
| | - Andreas Rohatschek
- Institute
of Lightweight Design and Structural Biomechanics, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
- Biointerface
Doctorate School, TU Wien, Vienna 1060, Austria
| | - Orestis Andriotis
- Institute
of Lightweight Design and Structural Biomechanics, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
| | - Nikolaos Bouropoulos
- Department
of Materials Science, University of Patras, Rio Patras GR-26504, Greece
- Foundation
for Research and Technology Hellas, Institute of Chemical Engineering
and High Temperature Chemical Processes, FORTH/ICE-HT, Patras 26504, Greece
| | - Robert Liska
- Institute
of Applied Synthetic Chemistry, Division of Macromolecular Chemistry, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
- Biointerface
Doctorate School, TU Wien, Vienna 1060, Austria
| | - Philipp J. Thurner
- Institute
of Lightweight Design and Structural Biomechanics, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
- Biointerface
Doctorate School, TU Wien, Vienna 1060, Austria
| | - Stefan Baudis
- Christian
Doppler Laboratory for Advanced Polymers for Biomaterials and 3D Printing, TU Wien, Vienna 1060, Austria
- Institute
of Applied Synthetic Chemistry, Division of Macromolecular Chemistry, TU Wien, Vienna 1060, Austria
- Austrian
Cluster for Tissue Regeneration, Vienna 1200, Austria
- Biointerface
Doctorate School, TU Wien, Vienna 1060, Austria
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7
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Neubauer VJ, Scheibel T. Spider Silk Fusion Proteins for Controlled Collagen Binding and Biomineralization. ACS Biomater Sci Eng 2020; 6:5599-5608. [PMID: 33320578 DOI: 10.1021/acsbiomaterials.0c00818] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The development of biomaterials for the interface between tendon and bone is important for realizing functional tendon replacements. Toward the development of new materials for such applications, engineered recombinant spider silk proteins were modified with peptide tag sequences derived from noncollagenous proteins in bone, so-called SIBLING proteins, such as osteopontin and sialoprotein, which are known to interact with collagen and to initiate mineralization. Materials made of these spider silk-SIBLING hybrids were analyzed concerning mineralization and interaction with cells. They showed enhanced calcium phosphate formation upon incubation in mineralization agents. In gradient films, MC3T3-E1 mouse preosteoblasts adhered preferentially along the gradient toward the variant with a collagen binding motif.
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Affiliation(s)
- Vanessa J Neubauer
- Lehrstuhl Biomaterialien, Fakultät für Ingenieurwissenschaften, Universität Bayreuth, Prof.-Rüdiger-Bormann-Straße 1, 95447 Bayreuth, Germany
| | - Thomas Scheibel
- Lehrstuhl Biomaterialien, Fakultät für Ingenieurwissenschaften, Universität Bayreuth, Prof.-Rüdiger-Bormann-Straße 1, 95447 Bayreuth, Germany.,Bayreuther Zentrum für Kolloide und Grenzflächen (BZKG), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.,Bayerisches Polymerinstitut (BPI), Universitätsstraße 30, 95440 Bayreuth, Germany.,Bayreuther Zentrum für Molekulare Biowissenschaften (BZMB), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.,Bayreuther Materialzentrum (BayMAT), Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
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8
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Bang J, Park H, Yoo J, Lee D, Choi WI, Lee JH, Lee YR, Kim C, Koo H, Kim S. Selection and identification of a novel bone-targeting peptide for biomedical imaging of bone. Sci Rep 2020; 10:10576. [PMID: 32601412 PMCID: PMC7324617 DOI: 10.1038/s41598-020-67522-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 06/02/2020] [Indexed: 11/27/2022] Open
Abstract
The global burden of bone-related diseases is increasing in the aging society; thus, improved bone targeted imaging for their early identification and treatment are needed. In this study, we screened novel peptide ligands for hydroxyapatite, a major inorganic component of teeth and bones, and identified a peptide enabling in vivo bone targeting and real-time fluorescence bone detection. To isolate peptides highly specific for hydroxyapatite, we used negative and positive selection from a randomized 8-mer peptide phage library and identified hydroxyapatite-specific peptides (HA-pep2, HA-pep3, and HA-pep7). Among these three peptides, HA-pep3 showed the highest binding capacity and superior dissociation constant towards hydroxyapatite surfaces over time (~ 88.3% retained on hydroxyapatite after two weeks). Furthermore, HA-pep3 was highly specific for hydroxyapatite compared to other calcium salt-based materials. Using this superior specificity, HA-pep3 showed higher accumulation in skull, spine, and joints in comparison with scrambled control peptide during real-time whole-body imaging. Ex vivo analysis of the major organs and bone from mice demonstrated that the fluorescence intensity in bone was about 3.32 folds higher in the case of HA-pep3 than the one exhibited by the scrambled control peptide. Our study identified a novel approach for targeting ligands for bone specific imaging and can be useful for drug delivery applications.
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Affiliation(s)
- Jinho Bang
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
| | - Heesun Park
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
- Department of Life Sciences, Korea University, Seoul, 136-701 South Korea
| | - Jihye Yoo
- Department of Medical Life Sciences, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591 South Korea
| | - Donghyun Lee
- Department of Medical Life Sciences, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591 South Korea
| | - Won Il Choi
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
| | - Jin Hyung Lee
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
| | - Young-Ran Lee
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
| | - Chungho Kim
- Department of Life Sciences, Korea University, Seoul, 136-701 South Korea
| | - Heebeom Koo
- Department of Medical Life Sciences, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591 South Korea
| | - Sunghyun Kim
- Korea Institute of Ceramic Engineering and Technology, Center for Convergence Bioceramic Materials, 202 Osongsaengmyeong 1-ro, Cheongjusi, Chungcheongbuk-do 28160 South Korea
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9
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Lu X, Xiong S, Chen Y, Zhao F, Hu Y, Guo Y, Wu B, Huang P, Yang B. Effects of statherin on the biological properties of titanium metals subjected to different surface modification. Colloids Surf B Biointerfaces 2020; 188:110783. [PMID: 32004907 DOI: 10.1016/j.colsurfb.2020.110783] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/23/2019] [Accepted: 01/07/2020] [Indexed: 12/13/2022]
Abstract
The failure of dental implants is usually caused by bacteria infection, poor bioactivity and biocompatibility. It is a common phenomenon clinically. Statherin, a salivary protein, plays a crucial role of mediator between materials and cells/bacteria. However, the conformation of statherin might be changed by the implants in vivo. In this study, we investigated the effects of statherin on the bioactivities, antibacterial abilities and biocompatibilities of the titanium metals and the reaction mechanism. We found that the conformation of statherin was mainly influenced by surface composition, surface structure, surface roughness, surface hydrophilia and Ti-OH groups of materials. Statherin could decrease the cell biocompatibility of the titanium metals including pure titanium (PT), anodic oxidation (AO), sandblasting and etching (SLA) and plasma spraying hydroxyapatite (HA) coating in HGF cell experiments, regulate the bio-mineralization ability of HA coating in SBF, and enhance the antibacterial properties of PT and HA coating. This study revealed that surface properties of materials could change the conformation of statherin, which influenced the bioactivities, antibacterial properties and biocompatibilities of the materials in return.
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Affiliation(s)
- Xugang Lu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Shibing Xiong
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yangmei Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Fenghua Zhao
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yi Hu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yuqiang Guo
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Boyao Wu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Ping Huang
- Panzhihua International Research Institute of Vanadium and Titanium, Panzhihua University, 617000, Panzhihua, Sichuan, China
| | - Bangcheng Yang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing, 210046, China.
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10
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Addition of an oligoglutamate domain to bone morphogenic protein 2 confers binding to hydroxyapatite materials and induces osteoblastic signaling. PLoS One 2019; 14:e0217766. [PMID: 31150531 PMCID: PMC6544276 DOI: 10.1371/journal.pone.0217766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/17/2019] [Indexed: 11/19/2022] Open
Abstract
Nonautologous bone grafts have limited osteoinductive potential and thus there is substantial interest in reconstituting these graft materials with osteogenic factors such as bone morphogenic protein 2 (BMP2). However, one limitation of this approach is that BMP2 is typically weakly bound to the graft, which can lead to side effects associated with BMP2 dissemination. In the current study we added a hydroxyapatite (HA)-binding domain onto BMP2 to increase coupling to the graft surface. A sequence consisting of eight glutamate residues (E8) was inserted into the C-terminus of BMP2, and the recombinant protein (rBMP2-E8) was expressed in E. coli. Compared with rBMP2, rBMP2-E8 displayed markedly enhanced binding to HA disks and was better retained on the disks following exposure to vigorous wash steps. Furthermore, rBMP2-E8 was purified using a heparin column, and evaluated for its capacity to stimulate osteoblastic cell signaling. Treatment of SAOS2 cells with rBMP2-E8 induced SMAD 1/5 activation, confirming that the protein retains activity. Collectively these results suggest that the E8 domain serves as an effective tool for improving rBMP2 coupling to graft materials. The increased retention of rBMP2-E8 on the graft surface is expected to prolong BMP2's osteoinductive activity within the graft site, while simultaneously reducing off-target effects.
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11
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Ramaraju H, Kohn DH. Cell and Material-Specific Phage Display Peptides Increase iPS-MSC Mediated Bone and Vasculature Formation In Vivo. Adv Healthc Mater 2019; 8:e1801356. [PMID: 30835955 DOI: 10.1002/adhm.201801356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 02/04/2019] [Indexed: 01/27/2023]
Abstract
Biomimetically designed materials matching the chemical and mechanical properties of tissue support higher mesenchymal stem cell (MSC) adhesion. However, directing cell-specific attachment and ensuring uniform cell distribution within the interior of 3D biomaterials remain key challenges in healing critical sized defects. Previously, a phage display derived MSC-specific peptide (DPIYALSWSGMA, DPI) was combined with a mineral binding sequence (VTKHLNQISQSY, VTK) to increase the magnitude and specificity of MSC attachment to calcium-phosphate biomaterials in 2D. This study investigates how DPI-VTK influences quantity and uniformity of iPS-MSC mediated bone and vasculature formation in vivo. There is greater bone formation in vivo when iPS-MSCs are transplanted on bone-like mineral (BLM) constructs coated with DPI-VTK compared to VTK (p < 0.002), uncoated BLM (p < 0.037), acellular BLM/DPI-VTK (p < 0.003), and acellular BLM controls (p < 0.01). This study demonstrates, for the first time, the ability of non-native phage-display designed peptides to spatially control uniform cell distribution on 3D scaffolds and increase the magnitude and uniformity of bone and vasculature formation in vivo. Taken together, the study validates phage display as a novel technology platform to engineer non-native peptides with the ability to drive cell specific attachment on biomaterials, direct bone regeneration, and engineer uniform vasculature in vivo.
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Affiliation(s)
- Harsha Ramaraju
- Department of Biologic and Material SciencesDepartment of Biomedical EngineeringUniversity of Michigan 1011 N. University Ave, Room 2213 Ann Arbor MI 48109‐1078 USA
| | - David H. Kohn
- Department of Biologic and Material SciencesDepartment of Biomedical EngineeringUniversity of Michigan 1011 N. University Ave, Room 2213 Ann Arbor MI 48109‐1078 USA
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12
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Calcium-Binding Nanoparticles for Vascular Disease. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-018-0083-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Chin DD, Chowdhuri S, Chung EJ. Calcium-binding nanoparticles for vascular disease. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019; 5:74-85. [PMID: 31106257 PMCID: PMC6516760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cardiovascular disease (CVD) including atherosclerosis is the leading cause of death worldwide. As CVDs and atherosclerosis develop, plaques begin to form in the blood vessels and become calcified. Calcification within the vasculature and atherosclerotic plaques have been correlated with rupture and consequently, acute myocardial infarction. However, current imaging methods to identify vascular calcification have limitations in determining plaque composition and structure. Nanoparticles can overcome these limitations due to their versatility and ability to incorporate a wide range of targeting and contrast agents. In this review, we summarize the current understanding of calcification in atherosclerosis, their role in instigating plaque instability, and clinical methodologies to detect and analyze vascular calcification. In addition, we highlight the potential of calcium-targeting ligands and nanoparticles to create novel calcium-detecting tools.
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Affiliation(s)
- Deborah D. Chin
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Sampreeti Chowdhuri
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Eun Ji Chung
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Division of Nephrology and Hypertension, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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14
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Hosseini S, Naderi-Manesh H, Vali H, Baghaban Eslaminejad M, Azam Sayahpour F, Sheibani S, Faghihi S. Contribution of osteocalcin-mimetic peptide enhances osteogenic activity and extracellular matrix mineralization of human osteoblast-like cells. Colloids Surf B Biointerfaces 2019; 173:662-671. [DOI: 10.1016/j.colsurfb.2018.10.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/22/2018] [Accepted: 10/14/2018] [Indexed: 12/20/2022]
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15
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Valente MT, Moffa EB, Crosara KTB, Xiao Y, de Oliveira TM, Machado MADAM, Siqueira WL. Acquired Enamel Pellicle Engineered Peptides: Effects on Hydroxyapatite Crystal Growth. Sci Rep 2018; 8:3766. [PMID: 29491390 PMCID: PMC5830524 DOI: 10.1038/s41598-018-21854-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/08/2018] [Indexed: 12/12/2022] Open
Abstract
The aim of this study was to test the hypothesis that duplication/hybridization of functional domains of naturally occurring pellicle peptides amplified the inhibitory effect of hydroxyapatite crystal growth, which is related to enamel remineralization and dental calculus formation. Histatin 3, statherin, their functional domains (RR14 and DR9), and engineered peptides (DR9-DR9 and DR9-RR14) were tested at seven different concentrations to evaluate the effect on hydroxyapatite crystal growth inhibition. A microplate colorimetric assay was used to quantify hydroxyapatite crystal growth. The half-maximal inhibitory concentration (IC50) was determined for each group. ANOVA and Student-Newman-Keuls pairwise comparisons were used to compare the groups. DR9-DR9 increased the inhibitory effect of hydroxyapatite crystal growth compared to single DR9 (p < 0.05), indicating that functional domain multiplication represented a strong protein evolution pathway. Interestingly, the hybrid peptide DR9-RR14 had an intermediate inhibitory effect compared to DR9 and DR9-DR9. This study used an engineered peptide approach to investigate a potential evolution protein pathway related to duplication/hybridization of acquired enamel pellicle's natural peptide constituents, contributing to the development of synthetic peptides for therapeutic use against dental caries and periodontal disease.
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Affiliation(s)
- Maria Teresa Valente
- School of Dentistry and Department of Biochemistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - Eduardo Buozi Moffa
- School of Dentistry and Department of Biochemistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - Karla Tonelli Bicalho Crosara
- School of Dentistry and Department of Biochemistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
| | - Yizhi Xiao
- School of Dentistry and Department of Biochemistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
| | - Thais Marchini de Oliveira
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | | | - Walter Luiz Siqueira
- School of Dentistry and Department of Biochemistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada.
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16
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Kim ID, Lee H, Jin YC, Lee JK. Osteopontin Peptide Icosamer Containing RGD and SLAYGLR Motifs Enhances the Motility and Phagocytic Activity of Microglia. Exp Neurobiol 2017; 26:339-349. [PMID: 29302201 PMCID: PMC5746499 DOI: 10.5607/en.2017.26.6.339] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/16/2017] [Accepted: 12/01/2017] [Indexed: 11/19/2022] Open
Abstract
Osteopontin (OPN) is a secreted glycoprotein that is expressed in various tissues, including brain, and mediates a wide range of cellular activities. In a previous study, the authors observed the robust neuroprotective effects of recombinant OPN and of RGD and SLAYGLR-containing OPN-peptide icosamer (OPNpt20) in an animal model of transient focal ischemia, and demonstrated anti-inflammatory and pro-angiogenic effects of OPNpt20 in the postischemic brain. In the present study, we investigated the effects of OPNpt20 on the motility and phagocytic activity of BV2 cells (a microglia cell line). F-actin polymerization and cell motility were significantly enhanced in OPNpt20-treated BV2 cells, and numbers of filopodia-like processes increased and lamellipodia-like structures enlarged and thickened. In addition, treatment of cells with either of three mutant OPN icosamers containing mutation within RGD, SLAY, or RGDSLAY showed that the RGD and SLAY motifs of OPNpt20 play critical roles in the enhancement of cell motility, and the interaction between exogenous OPNpt20 and endogenous αv and α4 integrin and the activations of FAK, Erk, and Akt signaling pathways were found to be involved in the OPNpt20-mediated induction of cell motility. Furthermore, phagocytic activity of microglia was also significantly enhanced by OPNpt20 in a RGD and SLAY dependent manner. These results indicate OPNpt20 containing RGD and SLAY motifs triggers microglial motility and phagocytic activity and OPNpt20-integrin mediated signaling plays a critical role in these activities.
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Affiliation(s)
- Il-Doo Kim
- Department of Anatomy, Inha University School of Medicine, Incheon, Korea.,Medical Research Center, Inha University School of Medicine, Incheon, Korea
| | - Hahnbie Lee
- Department of Anatomy, Inha University School of Medicine, Incheon, Korea.,Medical Research Center, Inha University School of Medicine, Incheon, Korea
| | - Yin-Chuan Jin
- Department of Histology and Embryology, Binzhou Medical University, Yantai 264000, China
| | - Ja-Kyeong Lee
- Department of Anatomy, Inha University School of Medicine, Incheon, Korea.,Medical Research Center, Inha University School of Medicine, Incheon, Korea
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17
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Sun T, Zhou K, Liu M, Guo X, Qu Y, Cui W, Shao Z, Zhang X, Xu S. Loading of BMP-2-related peptide onto three-dimensional nano-hydroxyapatite scaffolds accelerates mineralization in critical-sized cranial bone defects. J Tissue Eng Regen Med 2017; 12:864-877. [PMID: 27885807 DOI: 10.1002/term.2371] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 07/14/2016] [Accepted: 11/09/2016] [Indexed: 01/08/2023]
Abstract
Extrusion free-forming, as a rapid prototyping technique, is extensively applied in fabricating ceramic material in bone tissue engineering. To improve the osteoinductivity of nano-hydroxyapatite (nHA) scaffold fabricated by extrusion free-forming, in this study, we incorporated a new peptide (P28) and optimized the superficial microstructure after shaping by controlling the sintering temperature. P28, a novel bone morphogenic protein 2 (BMP-2)-related peptide, was designed in this study. Analysis of the structure, physicochemical properties and release kinetics of P28 from nHA sintered at temperatures ranging from 1000 °C to 1400 °C revealed that nHA sintered at 1000 °C had higher porosity, preferable pore size and better capacity to control P28 release than that sintered at other temperatures. Moreover, the nHA scaffold sintered at 1000 °C with P28 showed improved adhesion, proliferation and osteogenic differentiation of MC3T3-E1 cells compared with scaffolds lacking P28 or BMP-2. In vivo, nHA scaffolds sintered at 1000 °C with P28 or BMP-2 induced greater bone regeneration in critical-sized rat cranial defects at 6 and 12 weeks post-implantation compared with scaffolds lacking P28 or BMP-2. Thus, nHA scaffolds sintered at 1000 °C and loaded with P28 may be excellent biomaterials for bone tissue engineering. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Tingfang Sun
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Kui Zhou
- State Key Lab of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Man Liu
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaodong Guo
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yanzhen Qu
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Wei Cui
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - ZengWu Shao
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xianglin Zhang
- State Key Lab of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Shuyun Xu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
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18
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Ramaraju H, Miller SJ, Kohn DH. Dual-functioning peptides discovered by phage display increase the magnitude and specificity of BMSC attachment to mineralized biomaterials. Biomaterials 2017; 134:1-12. [PMID: 28453953 DOI: 10.1016/j.biomaterials.2017.04.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 04/17/2017] [Indexed: 02/09/2023]
Abstract
Design of biomaterials for cell-based therapies requires presentation of specific physical and chemical cues to cells, analogous to cues provided by native extracellular matrices (ECM). We previously identified a peptide sequence with high affinity towards apatite (VTKHLNQISQSY, VTK) using phage display. The aims of this study were to identify a human MSC-specific peptide sequence through phage display, combine it with the apatite-specific sequence, and verify the specificity of the combined dual-functioning peptide to both apatite and human bone marrow stromal cells. In this study, a combinatorial phage display identified the cell binding sequence (DPIYALSWSGMA, DPI) which was combined with the mineral binding sequence to generate the dual peptide DPI-VTK. DPI-VTK demonstrated significantly greater binding affinity (1/KD) to apatite surfaces compared to VTK, phosphorylated VTK (VTKphos), DPI-VTKphos, RGD-VTK, and peptide-free apatite surfaces (p < 0.01), while significantly increasing hBMSC adhesion strength (τ50, p < 0.01). MSCs demonstrated significantly greater adhesion strength to DPI-VTK compared to other cell types, while attachment of MC3T3 pre-osteoblasts and murine fibroblasts was limited (p < 0.01). MSCs on DPI-VTK coated surfaces also demonstrated increased spreading compared to pre-osteoblasts and fibroblasts. MSCs cultured on DPI-VTK coated apatite films exhibited significantly greater proliferation compared to controls (p < 0.001). Moreover, early and late stage osteogenic differentiation markers were elevated on DPI-VTK coated apatite films compared to controls. Taken together, phage display can identify non-obvious cell and material specific peptides to increase human MSC adhesion strength to specific biomaterial surfaces and subsequently increase cell proliferation and differentiation. These new peptides expand biomaterial design methodology for cell-based regeneration of bone defects. This strategy of combining cell and material binding phage display derived peptides is broadly applicable to a variety of systems requiring targeted adhesion of specific cell populations, and may be generalized to the engineering of any adhesion surface.
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Affiliation(s)
- Harsha Ramaraju
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Sharon J Miller
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - David H Kohn
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; Department of Biologic and Material Sciences, University of Michigan, Ann Arbor, MI, USA.
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19
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Bidentate iminodiacetate modified dendrimer for bone imaging. Bioorg Med Chem Lett 2017; 27:1252-1255. [PMID: 28153357 DOI: 10.1016/j.bmcl.2017.01.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/13/2017] [Accepted: 01/16/2017] [Indexed: 11/24/2022]
Abstract
A new dendrimer probe was designed for bone imaging. Bidentate iminodiacetate groups were introduced to the probe to obtain strong bind to bones. The assembled dendrimeric probe, with four iminodiacetate moieties and a fluorescent tag, displayed good selectivity to hydroxyapatite, calcium oxalate and calcium phosphate salts. In mice, the probe offered vivid skeletal details after intravenous delivery.
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20
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Stayton PS, Drobny GP, Shaw WJ, Long JR, Gilbert M. Molecular Recognition at the Protein-Hydroxyapatite Interface. ACTA ACUST UNITED AC 2016; 14:370-6. [PMID: 14530305 DOI: 10.1177/154411130301400507] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Proteins found in mineralized tissues act as nature’s crystal engineers, where they play a key role in promoting or inhibiting the growth of minerals such as hydroxyapatite (bones/teeth) and calcium oxalate (kidney stones). Despite their importance in hard-tissue formation and remodeling, and in pathological processes such as stone formation and arterial calcification, there is little known of the protein structure-function relationships that govern hard-tissue engineering. Here we review early studies that have utilized solid-state NMR (ssNMR) techniques to provide in situ secondary-structure determination of statherin and statherin peptides on their biologically relevant hydroxyapatite (HAP) surfaces. In addition to direct structural study, molecular dynamics studies have provided considerable insight into the protein-binding footprint on hydroxyapatite. The molecular insight provided by these studies has also led to the design of biomimetic fusion peptides that utilize nature’s crystal-recognition mechanism to display accessible and dynamic bioactive sequences from the HAP surface. These peptides selectively engage adhesion receptors and direct specific outside-in signaling pathway activation in osteoblast-like cells.
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Affiliation(s)
- Patrick S Stayton
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
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21
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Zhang Y, Dong R, Park Y, Bohner M, Zhang X, Ting K, Soo C, Wu BM. Controlled release of NELL-1 protein from chitosan/hydroxyapatite-modified TCP particles. Int J Pharm 2016; 511:79-89. [PMID: 27349789 PMCID: PMC6705139 DOI: 10.1016/j.ijpharm.2016.06.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/15/2016] [Accepted: 06/19/2016] [Indexed: 01/18/2023]
Abstract
NEL-like molecule-1 (NELL-1) is a novel osteogenic protein that showing high specificity to osteochondral cells. It was widely used in bone regeneration research by loading onto carriers such as tricalcium phosphate (TCP) particles. However, there has been little research on protein controlled release from this material and its potential application. In this study, TCP was first modified with a hydroxyapatite coating followed by a chitosan coating to prepare chitosan/hydroxyapatite-coated TCP particles (Chi/HA-TCP). The preparation was characterized by SEM, EDX, FTIR, XRD, FM and Zeta potential measurements. The NELL-1 loaded Chi/HA-TCP particles and the release kinetics were investigated in vitro. It was observed that the Chi/HA-TCP particles prepared with the 0.3% (wt/wt) chitosan solution were able to successfully control the release of NELL-1 and maintain a slow, steady release for up to 28 days. Furthermore, more than 78% of the loaded protein's bioactivity was preserved in Chi/HA-TCP particles over the period of the investigation, which was significantly higher than that of the protein released from hydroxyapatite coated TCP (HA-TCP) particles. Collectively, this study suggests that the osteogenic protein NELL-1 showed a sustained release pattern after being encapsulated into the modified Chi/HA-TCP particles, and the NELL-1 integrated composite of Chi/HA-TCP showed a potential to function as a protein delivery carrier and as an improved bone matrix for use in bone regeneration research.
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Affiliation(s)
- Yulong Zhang
- Department of Bioengineering, Department of Materials Science and Engineering, and Division of Advanced Prosthodontics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Rui Dong
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, PR China
| | - Yujin Park
- Department of Bioengineering, Department of Materials Science and Engineering, and Division of Advanced Prosthodontics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Marc Bohner
- RMS Foundation, Bischmattstr. 12, CH-2544 Bettlach, Switzerland
| | - Xinli Zhang
- Weintraub Center for Reconstructive Biotechnology, and Dental and Craniofacial Research Institute, School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kang Ting
- Weintraub Center for Reconstructive Biotechnology, and Dental and Craniofacial Research Institute, School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Orthopaedic Surgery, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Chia Soo
- Weintraub Center for Reconstructive Biotechnology, and Dental and Craniofacial Research Institute, School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Orthopaedic Surgery, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Benjamin M Wu
- Department of Bioengineering, Department of Materials Science and Engineering, and Division of Advanced Prosthodontics, University of California, Los Angeles, Los Angeles, CA 90095, USA; Weintraub Center for Reconstructive Biotechnology, and Dental and Craniofacial Research Institute, School of Dentistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Orthopaedic Surgery, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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22
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Zhao W, Xu Z, Cui Q, Sahai N. Predicting the Structure-Activity Relationship of Hydroxyapatite-Binding Peptides by Enhanced-Sampling Molecular Simulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7009-7022. [PMID: 27329793 DOI: 10.1021/acs.langmuir.6b01582] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Understanding the molecular structural and energetic basis of the interactions between peptides and inorganic surfaces is critical to their applications in tissue engineering and biomimetic material synthesis. Despite recent experimental progresses in the identification and functionalization of hydroxyapatite (HAP)-binding peptides, the molecular mechanisms of their interactions with HAP surfaces are yet to be explored. In particular, the traditional method of molecular dynamics (MD) simulation suffers from insufficient sampling at the peptide-inorganic interface that renders the molecular-level observation dubious. Here we demonstrate that an integrated approach combining bioinformatics, MD, and metadynamics provides a powerful tool for investigating the structure-activity relationship of HAP-binding peptides. Four low charge density peptides, previously identified by phage display, have been considered. As revealed by bioinformatics and MD, the binding conformation of the peptides is controlled by both the sequence and the amino acid composition. It was found that formation of hydrogen bonds between lysine residue and phosphate ions on the surface dictates the binding of positively charged peptide to HAP. The binding affinities of the peptides to the surface are estimated by free energy calculation using parallel-tempering metadynamics, and the results compare favorably to measurements reported in previous experimental studies. The calculation suggests that the charge density of the peptide primarily controls the binding affinity to the surface, while the backbone secondary structure that may restrain side chain orientation toward the surface plays a minor role. We also report that the application of enhanced-sampling metadynamics effects a major advantage over the steered MD method by significantly improving the reliability of binding free energy calculation. In general, our novel integration of diverse sampling techniques should contribute to the rational design of surface-recognition peptides in biomedical applications.
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Affiliation(s)
| | | | - Qiang Cui
- Department of Chemistry and Theoretical Chemistry Institute, University of Wisconsin-Madison , Madison, Wisconsin 53706-1322, United States
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23
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Pountos I, Panteli M, Lampropoulos A, Jones E, Calori GM, Giannoudis PV. The role of peptides in bone healing and regeneration: a systematic review. BMC Med 2016; 14:103. [PMID: 27400961 PMCID: PMC4940902 DOI: 10.1186/s12916-016-0646-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Bone tissue engineering and the research surrounding peptides has expanded significantly over the last few decades. Several peptides have been shown to support and stimulate the bone healing response and have been proposed as therapeutic vehicles for clinical use. The aim of this comprehensive review is to present the clinical and experimental studies analysing the potential role of peptides for bone healing and bone regeneration. METHODS A systematic review according to PRISMA guidelines was conducted. Articles presenting peptides capable of exerting an upregulatory effect on osteoprogenitor cells and bone healing were included in the study. RESULTS Based on the available literature, a significant amount of experimental in vitro and in vivo evidence exists. Several peptides were found to upregulate the bone healing response in experimental models and could act as potential candidates for future clinical applications. However, from the available peptides that reached the level of clinical trials, the presented results are limited. CONCLUSION Further research is desirable to shed more light into the processes governing the osteoprogenitor cellular responses. With further advances in the field of biomimetic materials and scaffolds, new treatment modalities for bone repair will emerge.
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Affiliation(s)
- Ippokratis Pountos
- Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds, UK
| | - Michalis Panteli
- Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds, UK
| | | | - Elena Jones
- Unit of Musculoskeletal Disease, Leeds Institute of Rheumatic and Musculoskeletal Medicine, St. James University Hospital, University of Leeds, LS9 7TF, Leeds, UK
| | - Giorgio Maria Calori
- Department of Trauma & Orthopaedics, School of Medicine, ISTITUTO ORTOPEDICO GAETANO PINI, Milan, Italy
| | - Peter V Giannoudis
- Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds, UK. .,NIHR Leeds Biomedical Research Unit, Chapel Allerton Hospital, LS7 4SA Leeds, West Yorkshire, Leeds, UK.
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24
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Osteopontin expression in co-cultures of human squamous cell carcinoma-derived cells and osteoblastic cells and its effects on the neoplastic cell phenotype and osteoclastic activation. Tumour Biol 2016; 37:12371-12385. [DOI: 10.1007/s13277-016-5104-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/09/2016] [Indexed: 11/26/2022] Open
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25
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Ramaswamy J, Nam HK, Ramaraju H, Hatch NE, Kohn DH. Inhibition of osteoblast mineralization by phosphorylated phage-derived apatite-specific peptide. Biomaterials 2015; 73:120-30. [PMID: 26406452 DOI: 10.1016/j.biomaterials.2015.09.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 09/14/2015] [Indexed: 11/20/2022]
Abstract
Functionalization of biomaterials with material- and cell-specific peptide sequences allows for better control of their surface properties and communication with the surrounding environment. Using a combinatorial phage display approach, we previously identified the peptide VTKHLNQISQSY (VTK) with specific affinity to biomimetic apatite. Phosphorylation of the serine residues of the peptide (pVTK) caused a significant increase in binding to apatite, as well as a dose-dependent inhibition of osteoblast mineralization. In this study, we investigated the mechanisms behind pVTK mediated inhibition of mineralization using MC3T3 cells and testing the hypothesis that mineralization is inhibited via alteration of the Enpp1-TNAP-Ank axis. Inhibition of mineralization was not due to disruption of collagen deposition or calcium chelation by the negatively charged pVTK. The timing of peptide administration was important in inhibiting mineralization - pVTK had a greater effect at later stages of osteogenic differentiation (days 7-12 of culture corresponding to matrix maturation and mineralization), and could prevent progression of mineralization once it had started. pVTK treatment resulted in a significant decrease in ectonucleotide pyrophosphatase/phosphodiesterase 1 (Enpp1) enzyme activity and gene expression. The expression of ankylosis protein (Ank), osteopontin (OPN) and Pit-1 genes was also significantly reduced with peptide treatment, while tissue non-specific alkaline phosphatase (TNAP), bone sialoprotein (BSP), and Runx2 gene expression was significantly higher. The ability of pVTK to inhibit mineralization can potentially be translated into therapeutics against pathological calcification seen in cardiovascular disease, osteoarthritis or craniosynostosis, or be used to prevent failure of biomaterials due to calcification, such as bioprosthetic heart valves.
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Affiliation(s)
- Janani Ramaswamy
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
| | - Hwa Kyung Nam
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - Harsha Ramaraju
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
| | - Nan E Hatch
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - David H Kohn
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; Department of Biologic & Materials Sciences, University of Michigan, Ann Arbor, MI, USA.
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26
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Wei J, Xu M, Zhang X, Meng S, Wang Y, Zhou T, Ma Q, Han B, Wei Y, Deng X. Enhanced Osteogenic Behavior of ADSCs Produced by Deproteinized Antler Cancellous Bone and Evidence for Involvement of ERK Signaling Pathway. Tissue Eng Part A 2015; 21:1810-21. [DOI: 10.1089/ten.tea.2014.0395] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Jinqi Wei
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
- First Clinical Division, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Mingming Xu
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Xuehui Zhang
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
- Department of Dental Materials, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Song Meng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Yixiang Wang
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Tuanfeng Zhou
- First Clinical Division, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Qi Ma
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Bing Han
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Yan Wei
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
- National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
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Özdal-Kurt F, Tuğlu I, Vatansever HS, Tong S, Deliloğlu-Gürhan SI. The effect of autologous bone marrow stromal cells differentiated on scaffolds for canine tibial bone reconstruction. Biotech Histochem 2015; 90:516-28. [PMID: 25994048 DOI: 10.3109/10520295.2014.983547] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Bone marrow contains mesenchymal stem cells that form many tissues. Various scaffolds are available for bone reconstruction by tissue engineering. Osteoblastic differentiated bone marrow stromal cells (BMSC) promote osteogenesis on scaffolds and stimulate bone regeneration. We investigated the use of cultured autologous BMSC on different scaffolds for healing defects in tibias of adult male canines. BMSC were isolated from canine humerus bone marrow, differentiated into osteoblasts in culture and loaded onto porous ceramic scaffolds including hydroxyapatite 1, hydroxyapatite gel and calcium phosphate. Osteoblast differentiation was verified by osteonectine and osteocalcine immunocytochemistry. The scaffolds with stromal cells were implanted in the tibial defect. Scaffolds without stromal cells were used as controls. Sections from the defects were processed for histological, ultrastructural, immunohistochemical and histomorphometric analyses to analyze the healing of the defects. BMSC were spread, allowed to proliferate and differentiate to osteoblasts as shown by alizarin red histochemistry, and osteocalcine and osteonectine immunostaining. Scanning electron microscopy showed that BMSC on the scaffolds were more active and adhesive to the calcium phosphate scaffold compared to the others. Macroscopic bone formation was observed in all groups, but scaffolds with stromal cells produced significantly better results. Bone healing occurred earlier and faster with stromal cells on the calcium phosphate scaffold and produced more callus compared to other scaffolds. Tissue healing and osteoblastic marker expression also were better with stromal cells on the scaffolds. Increased trabecula formation, cell density and decreased fibrosis were observed in the calcium phosphate scaffold with stromal cells. Autologous cultured stromal cells on the scaffolds were useful for healing of canine tibial bone defects. The calcium phosphate scaffold was the best for both cell differentiation in vitro and bone regeneration in vivo. It may be possible to improve healing of bone defects in humans using stem cells from bone marrow.
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Affiliation(s)
- F Özdal-Kurt
- a Department of Biology , Faculty of Sciences and Letters, Celal Bayar University , Manisa , Turkey
| | - I Tuğlu
- b Department of Histology and Embryology , Faculty of Medicine, Celal Bayar University , Manisa , Turkey
| | - H S Vatansever
- b Department of Histology and Embryology , Faculty of Medicine, Celal Bayar University , Manisa , Turkey
| | - S Tong
- c Veterinary Department of Konak Municipality , İzmir , Turkey
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Yu X, Suárez-González D, Khalil AS, Murphy WL. How does the pathophysiological context influence delivery of bone growth factors? Adv Drug Deliv Rev 2015; 84:68-84. [PMID: 25453269 PMCID: PMC4401584 DOI: 10.1016/j.addr.2014.10.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/29/2014] [Accepted: 10/07/2014] [Indexed: 02/08/2023]
Abstract
"Orthobiologics" represents an important category of therapeutics for the regeneration of bone defects caused by injuries or diseases, and bone growth factors are a particularly rapidly growing sub-category. Clinical application of bone growth factors has accelerated in the last two decades with the introduction of BMPs into clinical bone repair. Optimal use of growth factor-mediated treatments heavily relies on controlled delivery, which can substantially influence the local growth factor dose, release kinetics, and biological activity. The characteristics of the surrounding environment, or "context", during delivery can dictate growth factor loading efficiency, release and biological activity. This review discusses the influence of the surrounding environment on therapeutic delivery of bone growth factors. We specifically focus on pathophysiological components, including soluble components and cells, and how they can actively influence the therapeutic delivery and perhaps efficacy of bone growth factors.
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Affiliation(s)
- Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Darilis Suárez-González
- Department of Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Andrew S Khalil
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - William L Murphy
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, 53705, USA.
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Polini A, Wang J, Bai H, Zhu Y, Tomsia AP, Mao C. Stable biofunctionalization of hydroxyapatite (HA) surfaces by HA-binding/osteogenic modular peptides for inducing osteogenic differentiation of mesenchymal stem cells. Biomater Sci 2014; 2:1779-1786. [PMID: 25642327 DOI: 10.1039/c4bm00164h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hydroxyapatite (HA), the principal component of bone mineral, shows osteoconductive properties when employed for coating metal implants as well as scaffold materials in synthetic bone grafts. With the goal of providing this material with osteoinductive capabilities to promote faster bone regeneration, we show an easy approach to functionalize HA implant surfaces and enrich them with osteoinductive properties by the use of HA-binding modular peptides. The modular peptides are designed as a combination of two domains, an HA-binding peptide motif and an osteogenic peptide motif derived from the osteogenic growth peptide (OGP) or bone morphometric protein 7 (BMP-7). To identify the best HA-binding peptide, several nature-inspired peptides derived from natural bone extracellular matrix proteins (bone sialoprotein, osteonectin, osteocalcin, and salivarin statherin) were compared for HA-binding activity, revealing concentration-dependent and incubation-time-dependent behaviours. We discovered that a Poly-E heptamer (E7) is the best HA-binding peptide, and thus combined it with a second osteogenic peptidic domain to create an osteoinductive modular peptide. After binding/release characterization, we found that the addition of the second osteogenic peptide domain did not change the binding profile of the modular peptides and caused only a slight change in their release kinetics. Mesenchymal stem cells (MSCs) were cultured on the HA substrates functionalized with modular peptides, and cell adhesion, proliferation, and differentiation in a basal medium (i.e., without any osteogenic supplements) were investigated. Gene expression data clearly showed that MSCs were committed to differentiate into osteoblasts in the presence of the modular peptides. HA discs functionalized with the E7 BMP-7 modular peptide showed the best capability in inducing the osteogenic differentiation of MSCs among all modular peptides studied. The modular peptides can easily be used to functionalize the HA implants through its constituent HA-binding motif, leaving the osteogenic peptide motif protruding from the surface for inducing osteogenesis. Our work opens up a new approach to the formulation of new bioactive HA coatings and implants for bone and dental repair.
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Affiliation(s)
- Alessandro Polini
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jianglin Wang
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019, USA
| | - Hao Bai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ye Zhu
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019, USA
| | - Antoni P Tomsia
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Chuanbin Mao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA ; Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK 73019, USA
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Ramaraju H, Miller SS, Kohn DH. Dual-functioning phage-derived peptides encourage human bone marrow cell-specific attachment to mineralized biomaterials. Connect Tissue Res 2014; 55 Suppl 1:160-3. [PMID: 25158203 PMCID: PMC4245028 DOI: 10.3109/03008207.2014.923868] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Cell instructive mineralized biomaterials are a promising alternative to conventional auto-, allo-, and xenograft therapies for the reconstruction of critical sized defects. Extracellular matrix proteins, peptide domains, and functional motifs demonstrating cell and mineral binding activity have been used to improve cell attachment. However, these strategies vary in their tissue regeneration outcomes due to lack of specificity to both regenerative cell populations and the material substrates. In order to mediate cell-specific interactions on apatite surfaces, we identified peptide sequences with high affinity towards apatite (VTKHLNQISQSY, VTK) and clonally derived human bone marrow stromal cells (DPIYALSWSGMA, DPI) using phage display. The primary aims of this study were to measure apatite binding affinity, human bone marrow stromal cell (hBMSC) adhesion strength, and peptide specificity to hBMSCs when the apatite and cell-specific peptides are combined into a dual-functioning peptide. To assess binding affinity to hydroxyapatite (HA), binding isotherms were constructed and peptide binding affinity (K1) determined. HBMSC, MC3T3 and mouse dermal fibroblast (MDF) adhesion strength on biomimetic apatite functionalized with single- and dual-functioning peptide sequences were evaluated using a centrifugation assay. DPI-VTK had the highest binding strength towards hBMSCs (p < 0.01). DPI-VTK, while promoting strong initial attachment to hBMSCs, did not encourage strong adhesions to MC3T3s or fibroblasts (p < 0.01). Taken together, phage display is a promising strategy to identify preferential cell and material binding peptide sequences that can tether specific cell populations onto specific biomaterial chemistries.
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Affiliation(s)
- Harsha Ramaraju
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Corresponding Author: David H. Kohn, Ph.D., Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 N. University Ave, Room 2213, Ann Arbor, MI 48109-1078, Ph: 734-764-2206, Fax: 734-647-2110,
| | - Sharon S. Miller
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - David H. Kohn
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Biologic and Material Sciences, University of Michigan, Ann Arbor, MI, USA
- Corresponding Author: David H. Kohn, Ph.D., Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 N. University Ave, Room 2213, Ann Arbor, MI 48109-1078, Ph: 734-764-2206, Fax: 734-647-2110,
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Bonhomme C, Gervais C, Laurencin D. Recent NMR developments applied to organic-inorganic materials. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2014; 77:1-48. [PMID: 24411829 DOI: 10.1016/j.pnmrs.2013.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/17/2013] [Indexed: 06/03/2023]
Abstract
In this contribution, the latest developments in solid state NMR are presented in the field of organic-inorganic (O/I) materials (or hybrid materials). Such materials involve mineral and organic (including polymeric and biological) components, and can exhibit complex O/I interfaces. Hybrids are currently a major topic of research in nanoscience, and solid state NMR is obviously a pertinent spectroscopic tool of investigation. Its versatility allows the detailed description of the structure and texture of such complex materials. The article is divided in two main parts: in the first one, recent NMR methodological/instrumental developments are presented in connection with hybrid materials. In the second part, an exhaustive overview of the major classes of O/I materials and their NMR characterization is presented.
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Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
| | - Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR5253, CNRS UM2 UM1 ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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Miriani M, Eberini I, Iametti S, Ferranti P, Sensi C, Bonomi F. Unfolding of beta-lactoglobulin on the surface of polystyrene nanoparticles: Experimental and computational approaches. Proteins 2014; 82:1272-82. [DOI: 10.1002/prot.24493] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/07/2013] [Accepted: 11/19/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Matteo Miriani
- Section of Chemistry and Biomolecular Sciences, DeFENS, University of Milan; Via Celoria 2, 20133, Milan Italy
| | - Ivano Eberini
- Laboratorio di Biochimica e Biofisica Computazionale, Sezione di Biochimica, Biofisica, Fisiologia ed Immunopatologia, Dipartimento di Scienze Farmacologiche e Biomolecolari, University of Milan; Via Balzaretti 9, 20133, Milan Italy
| | - Stefania Iametti
- Section of Chemistry and Biomolecular Sciences, DeFENS, University of Milan; Via Celoria 2, 20133, Milan Italy
| | - Pasquale Ferranti
- Dipartimento di Agraria, University of Naples “Federico II,” Reggia di Portici; Via Università 100, 80055, Portici Italy
| | - Cristina Sensi
- Laboratorio di Biochimica e Biofisica Computazionale, Sezione di Biochimica, Biofisica, Fisiologia ed Immunopatologia, Dipartimento di Scienze Farmacologiche e Biomolecolari, University of Milan; Via Balzaretti 9, 20133, Milan Italy
| | - Francesco Bonomi
- Section of Chemistry and Biomolecular Sciences, DeFENS, University of Milan; Via Celoria 2, 20133, Milan Italy
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Zhang X, Xu M, Song L, Wei Y, Lin Y, Liu W, Heng BC, Peng H, Wang Y, Deng X. Effects of compatibility of deproteinized antler cancellous bone with various bioactive factors on their osteogenic potential. Biomaterials 2013; 34:9103-14. [DOI: 10.1016/j.biomaterials.2013.08.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 08/12/2013] [Indexed: 11/26/2022]
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Tang W, Ma Y, Xie S, Guo K, Katzenmeyer B, Wesdemiotis C, Becker ML. Valency-dependent affinity of bioactive hydroxyapatite-binding dendrons. Biomacromolecules 2013; 14:3304-13. [PMID: 23931528 DOI: 10.1021/bm400908c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hydroxyapatite (HA)-coated surfaces are used widely as stationary phase for protein and enzyme purification, coatings for dental and orthopedic implants, and composite materials for tissue engineering substrates. More advanced applications are envisioned, but progress has been slowed by the limited ability to controllably functionalize the surface of HA with biomolecules in a translationally relevant manner. Herein we report the synthesis and characterization of a series of multivalent, HA-binding peptide bioconjugates with variable valency and tether length which afford the ability to precisely tune the desired binding behavior. The respective binding affinities of the multivalent constructs to HA surface were characterized by quartz crystal microbalance with dissipation monitoring (QCM-D) techniques, and the relationship between dendron structure and binding affinity was revealed. Tetravalent constructs of HA-binding peptides show a 100-fold enhancement in binding affinity compared to HA-binding peptide sequences reported previously. Both biotin and bone morphogenic protein-2 (BMP-2) derivative peptide were successfully linked to the focal point as initial demonstrations.
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Affiliation(s)
- Wen Tang
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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35
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Li X, Xu J, Filion TM, Ayers DC, Song J. pHEMA-nHA encapsulation and delivery of vancomycin and rhBMP-2 enhances its role as a bone graft substitute. Clin Orthop Relat Res 2013; 471:2540-7. [PMID: 23070662 PMCID: PMC3705044 DOI: 10.1007/s11999-012-2644-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Bone grafts are widely used in orthopaedic procedures. Autografts are limited by donor site morbidity while allografts are known for considerable infection and failure rates. A synthetic composite bone graft substitute poly(2-hydroxyethyl methacrylate)-nanocrystalline hydroxyapatite (pHEMA-nHA) was previously developed to stably press-fit in and functionally repair critical-sized rat femoral segmental defects when it was preabsorbed with a single low dose of 300 ng recombinant human bone morphogenetic protein-2/7 (rhBMP-2/7). QUESTIONS/PURPOSES To facilitate clinical translation of pHEMA-nHA as a synthetic structural bone graft substitute, we examined its ability to encapsulate and release rhBMP-2 and the antibiotic vancomycin. METHODS We analyzed the compressive behavior and microstructure of pHEMA-nHA as a function of vancomycin incorporation doses using a dynamic mechanical analyzer and a scanning electron microscope. In vitro release of vancomycin was monitored by ultraviolet-visible spectroscopy. Release of rhBMP-2 from pHEMA-nHA-vancomycin was determined by ELISA. Bioactivity of the released vancomycin and rhBMP-2 was examined by bacterial inhibition and osteogenic transdifferentiation capabilities in cell culture, respectively. RESULTS Up to 4.8 wt% of vancomycin was incorporated into pHEMA-nHA without compromising its structural integrity and compressive modulus. Encapsulated vancomycin was released in a dose-dependent and sustained manner in phosphate-buffered saline over 2 weeks, and the released vancomycin inhibited Escherichia coli culture. The pHEMA-nHA-vancomycin composite released preabsorbed rhBMP-2 in a sustained manner over 8 days and locally induced osteogenic transdifferentiation of C2C12 cells in culture. CONCLUSIONS pHEMA-nHA can encapsulate and deliver vancomycin and rhBMP-2 in a sustained and localized manner with reduced loading doses. CLINICAL RELEVANCE The elasticity, osteoconductivity, and rhBMP-2/vancomycin delivery characteristics of pHEMA-nHA may benefit orthopaedic reconstructions or fusions with enhanced safety and efficiency and reduced infection risk.
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Affiliation(s)
- Xinning Li
- />Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School, 55 Lake Avenue North, S4-834, Worcester, MA 01655 USA
| | - Jianwen Xu
- />Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School, 55 Lake Avenue North, S4-834, Worcester, MA 01655 USA , />Department of Cell and Developmental Biology, University of Massachusetts Medical School, Worcester, MA USA
| | - Tera M. Filion
- />Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School, 55 Lake Avenue North, S4-834, Worcester, MA 01655 USA , />Department of Cell and Developmental Biology, University of Massachusetts Medical School, Worcester, MA USA
| | - David C. Ayers
- />Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School, 55 Lake Avenue North, S4-834, Worcester, MA 01655 USA
| | - Jie Song
- />Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School, 55 Lake Avenue North, S4-834, Worcester, MA 01655 USA , />Department of Cell and Developmental Biology, University of Massachusetts Medical School, Worcester, MA USA
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Culpepper BK, Webb WM, Bonvallet PP, Bellis SL. Tunable delivery of bioactive peptides from hydroxyapatite biomaterials and allograft bone using variable-length polyglutamate domains. J Biomed Mater Res A 2013; 102:1008-16. [PMID: 23625466 DOI: 10.1002/jbm.a.34766] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 04/02/2013] [Accepted: 04/18/2013] [Indexed: 11/08/2022]
Abstract
Hydroxyapatite (HA) biomaterials and allograft bone are common alternatives to autogenous grafts; however, these materials lack the strong osteoinductive potential of autologous bone. Previous studies have established that polyglutamate domains, which bind selectively to HA, can be engineered onto bioactive peptides as a mechanism for coupling osteoinductive signals onto HA and allograft. In the current investigation, we adapted the polyglutamate approach to tailor delivery of a model collagen-derived peptide, Asp-Gly-Glu-Ala (DGEA), by manipulating the number of glutamates in the HA binding domain. Specifically, DGEA was modified with diglutamate (E2-DGEA), tetraglutamate (E4-DGEA), or heptaglutamate (E7-DGEA), and it was found that initial peptide binding to HA and allograft was significantly enhanced as the number of glutamates increased. We also determined that the rate of release of polyglutamate-DGEA from substrates over a 5-day interval increased proportionally as the number of glutamate residues was decreased. Additionally, we tuned the peptide release rate by creating mixtures of E2-DGEA, E4-DGEA, and E7-DGEA, and observed that release kinetics of the mixtures were distinct from pure solutions of each respective peptide. These collective results suggest that variable-length polyglutamate domains provide an effective mechanism for controlled delivery of osteoregenerative peptides on HA-containing bone graft materials.
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Affiliation(s)
- Bonnie K Culpepper
- Department of Biomedical Engineering, University of Alabama at Birmingham, Alabama
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37
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Rychly J. Biointerface Technology. Regen Med 2013. [DOI: 10.1007/978-94-007-5690-8_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Gaebler A, Schaefer T, Fischer K, Scharnweber D, Mauth C, Schwenzer B. Peptide linkers for the immobilization of bioactive molecules on biphasic calcium phosphate via a modular immobilization system. Acta Biomater 2013; 9:4899-905. [PMID: 22975624 DOI: 10.1016/j.actbio.2012.08.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 08/14/2012] [Accepted: 08/17/2012] [Indexed: 10/27/2022]
Abstract
Herein we describe the use of peptide linkers to establish a nucleic acid-based immobilization system based on biphasic calcium phosphates (BCP), with which different molecules can be immobilized at the same time in defined ratios. It consists of single-stranded oligonucleotides, anchor strands (AS) which are immobilized to the surface and conjugates of complementary strands (CS) and bioactive molecules that bind to the AS via Watson-Crick base pairing. AS immobilization can be achieved on calcium phosphate ceramics using conjugates of AS and peptides that bind specifically to the ceramic. We successfully immobilized three different peptide sequences on BCP. Among them, we identified Stath (DpSpS EEK FLR RIG RFG, phosphoserine) as the most suitable one and further immobilized Stath-AS conjugates on BCP. This immobilized AS was able to hybridize with CS. Unspecific adsorption of oligonucleotides on the BCP surface was negligible. The stability of the system was proven by short term desorption experiments. The amounts of immobilized peptides, oligonucleotides and peptide-AS conjugates were determined by an enzymatic assay using biotin-streptavidin interactions, and were found to reach surface densities that are of therapeutic relevance (0.03 pmol cm(-2)).
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Rodríguez K, Sundberg J, Gatenholm P, Renneckar S. Electrospun nanofibrous cellulose scaffolds with controlled microarchitecture. Carbohydr Polym 2012; 100:143-9. [PMID: 24188848 DOI: 10.1016/j.carbpol.2012.12.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 11/20/2012] [Accepted: 12/14/2012] [Indexed: 10/27/2022]
Abstract
Introducing porosity in electrospun scaffolds is critical to improve cell penetration and nutrient diffusion for tissue engineering. Nanofibrous cellulose scaffolds were prepared by electrospinning cellulose acetate (CA) followed by saponification to regenerate cellulose. Using a computer-assisted design approach, scaffolds underwent laser ablation resulting in pores with diameters between 50 and 300 μm without damaging or modifying the surrounding scaffold area. A new mineralization method was employed in conjunction with microablation using commercial phosphate buffered saline (PBS) to soak carboxymethylcellulose surface-modified electrospun scaffolds. The resulting crystals within the scaffold on the interior of the pore had a calcium to phosphate ratio of 1.56, similar to hydroxyapatite. It was observed that porosity of the cellulose scaffolds enhanced osteoblast cell attachment at the edge of the pores, while mineralization enhanced overall cell density.
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Affiliation(s)
- Katia Rodríguez
- Department of Materials Science, Virginia Tech, Blacksburg, VA 24060, USA
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Culpepper BK, Bonvallet PP, Reddy MS, Ponnazhagan S, Bellis SL. Polyglutamate directed coupling of bioactive peptides for the delivery of osteoinductive signals on allograft bone. Biomaterials 2012. [PMID: 23182349 DOI: 10.1016/j.biomaterials.2012.10.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Allograft bone is commonly used as an alternative to autograft, however allograft lacks many osteoinductive factors present in autologous bone due to processing. In this study, we investigated a method to reconstitute allograft with osteoregenerative factors. Specifically, an osteoinductive peptide from collagen I, DGEA, was engineered to express a heptaglutamate (E7) domain, which binds the hydroxyapatite within bone mineral. Addition of E7 to DGEA resulted in 9× greater peptide loading on allograft, and significantly greater retention after a 5-day interval with extensive washing. When factoring together greater initial loading and retention, the E7 domain directed a 45-fold enhancement of peptide density on the allograft surface. Peptide-coated allograft was also implanted subcutaneously into rats and it was found that E7DGEA was retained in vivo for at least 3 months. Interestingly, E7DGEA peptides injected intravenously accumulated within bone tissue, implicating a potential role for E7 domains in drug delivery to bone. Finally, we determined that, as with DGEA, the E7 modification enhanced coupling of a bioactive BMP2-derived peptide on allograft. These results suggest that E7 domains are useful for coupling many types of bone-regenerative molecules to the surface of allograft to reintroduce osteoinductive signals and potentially advance allograft treatments.
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Affiliation(s)
- Bonnie K Culpepper
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Chai Y, Carlier A, Bolander J, Roberts S, Geris L, Schrooten J, Van Oosterwyck H, Luyten F. Current views on calcium phosphate osteogenicity and the translation into effective bone regeneration strategies. Acta Biomater 2012; 8:3876-87. [PMID: 22796326 DOI: 10.1016/j.actbio.2012.07.002] [Citation(s) in RCA: 162] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 06/28/2012] [Accepted: 07/03/2012] [Indexed: 02/06/2023]
Abstract
Calcium phosphate (CaP) has traditionally been used for the repair of bone defects because of its strong resemblance to the inorganic phase of bone matrix. Nowadays, a variety of natural or synthetic CaP-based biomaterials are produced and have been extensively used for dental and orthopaedic applications. This is justified by their biocompatibility, osteoconductivity and osteoinductivity (i.e. the intrinsic material property that initiates de novo bone formation), which are attributed to the chemical composition, surface topography, macro/microporosity and the dissolution kinetics. However, the exact molecular mechanism of action is unknown. This review paper first summarizes the most important aspects of bone biology in relation to CaP and the mechanisms of bone matrix mineralization. This is followed by the research findings on the effects of calcium (Ca²⁺) and phosphate (PO₄³⁻) ions on the migration, proliferation and differentiation of osteoblasts during in vivo bone formation and in vitro culture conditions. Further, the rationale of using CaP for bone regeneration is explained, focusing thereby specifically on the material's osteoinductive properties. Examples of different material forms and production techniques are given, with the emphasis on the state-of-the art in fine-tuning the physicochemical properties of CaP-based biomaterials for improved bone induction and the use of CaP as a delivery system for bone morphogenetic proteins. The use of computational models to simulate the CaP-driven osteogenesis is introduced as part of a bone tissue engineering strategy in order to facilitate the understanding of cell-material interactions and to gain further insight into the design and optimization of CaP-based bone reparative units. Finally, limitations and possible solutions related to current experimental and computational techniques are discussed.
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Abstract
Biointegration refers to the interconnection between a biomedical device and the recipient tissue. In many implant devices, the lack of proper biointegration can cause device failure and potentially serious medical problems. This review summarizes the recent progress in surface chemistry, drug delivery and antifouling methods to improve the biointegration of implants. Much progress has been made as our understanding of biological systems and material properties expands and as new technologies become available. This article addresses methods of enhancing biointegration by means of modifying implant surface chemistry and by drug-delivery approaches.
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Tada S, Kitajima T, Ito Y. Design and synthesis of binding growth factors. Int J Mol Sci 2012; 13:6053-6072. [PMID: 22754349 PMCID: PMC3382770 DOI: 10.3390/ijms13056053] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 04/10/2012] [Accepted: 05/09/2012] [Indexed: 01/01/2023] Open
Abstract
Growth factors play important roles in tissue regeneration. However, because of their instability and diffusible nature, improvements in their performance would be desirable for therapeutic applications. Conferring binding affinities would be one way to improve their applicability. Here we review techniques for conjugating growth factors to polypeptides with particular affinities. Conjugation has been designed at the level of gene fusion and of polypeptide ligation. We summarize and discuss the designs and applications of binding growth factors prepared by such conjugation approaches.
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Affiliation(s)
- Seiichi Tada
- Nano Medical Engineering Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takashi Kitajima
- Nano Medical Engineering Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshihiro Ito
- Nano Medical Engineering Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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KITAJIMA T, TADA S, ITO Y. Creation of Binding Growth Factors and Their Applications. KOBUNSHI RONBUNSHU 2012. [DOI: 10.1295/koron.69.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dong XL, Qi W, Tao W, Ma LY, Fu CX. The dynamic behaviours of protein BMP-2 on hydroxyapatite nanoparticles. MOLECULAR SIMULATION 2011. [DOI: 10.1080/08927022.2011.582108] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Liu P, Smits J, Ayers DC, Song J. Surface mineralization of Ti6Al4V substrates with calcium apatites for the retention and local delivery of recombinant human bone morphogenetic protein-2. Acta Biomater 2011; 7:3488-95. [PMID: 21651998 DOI: 10.1016/j.actbio.2011.05.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 05/11/2011] [Accepted: 05/20/2011] [Indexed: 11/17/2022]
Abstract
Titanium alloys are prevalently used as orthopedic prosthetics. Inadequate bone-implant interactions can lead to premature prosthetic loosening and implant failure. Local delivery of osteogenic therapeutics promoting osteointegration of the implant is an attractive strategy to address this clinical challenge. Given the affinity of calcium apatites for bone matrix proteins we hypothesize that titanium alloys surface mineralized with calcium apatites should be explored for the retention and local delivery of osteogenic recombinant human bone morphogenetic protein-2 (rhBMP-2). Using a heterogeneous surface nucleation and growth process driven by the gradual pH elevation of an acidic solution of hydroxyapatite via thermal decomposition of urea, Ti6Al4V substrates were surface mineralized with calcium apatite domains exhibiting good affinity for the substrate. The microstructures, size and surface coverage of the mineral domains as a function of the in vitro mineralization conditions were examined by light and scanning electron microscopy and the surface calcium ion content quantified. An optimal mineralization condition was identified to rapidly (<10h) achieve surface mineral coverage far superior to those accomplished by week long incubation in simulated body fluids. In vitro retention-release profiles of rhBMP-2 from the mineralized and unmineralized Ti6Al4V, determined by an enzyme-linked immunosorbent assay, supported a higher degree of retention of rhBMP-2 on the mineralized substrate. The rhBMP-2 retained on the mineralized substrate after 24h incubation in phosphate-buffered saline remained bioactive, as indicated by its ability to induce osteogenic transdifferentiation of C2C12 myoblasts attached to the substrate. This mineralization technique could also be applied to the surface mineralization of calcium apatites on dense tantalum and titanium and porous titanium substrates.
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Affiliation(s)
- Pingsheng Liu
- Department of Orthopedics and Physical Rehabilitation, University of Massachusetts Medical School, Worcester, MA 01655, USA
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Recombinant hBMP4 incorporated with non-canonical amino acid for binding to hydroxyapatite. Biotechnol Lett 2011; 33:1885-90. [DOI: 10.1007/s10529-011-0637-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 04/19/2011] [Indexed: 12/30/2022]
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Pathi SP, Lin DDW, Dorvee JR, Estroff LA, Fischbach C. Hydroxyapatite nanoparticle-containing scaffolds for the study of breast cancer bone metastasis. Biomaterials 2011; 32:5112-22. [PMID: 21507478 DOI: 10.1016/j.biomaterials.2011.03.055] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 03/19/2011] [Indexed: 12/27/2022]
Abstract
Breast cancer frequently metastasizes to bone, where it leads to secondary tumor growth, osteolytic bone degradation, and poor clinical prognosis. Hydroxyapatite Ca(10)(PO(4))(6)(OH)(2) (HA), a mineral closely related to the inorganic component of bone, may be implicated in these processes. However, it is currently unclear how the nanoscale materials properties of bone mineral, such as particle size and crystallinity, which change as a result of osteolytic bone remodeling, affect metastatic breast cancer. We have developed a two-step hydrothermal synthesis method to obtain HA nanoparticles with narrow size distributions and varying crystallinity. These nanoparticles were incorporated into gas-foamed/particulate leached poly(lactide-co-glycolide) scaffolds, which were seeded with metastatic breast cancer cells to create mineral-containing scaffolds for the study of breast cancer bone metastasis. Our results suggest that smaller, poorly-crystalline HA nanoparticles promote greater adsorption of adhesive serum proteins and enhance breast tumor cell adhesion and growth relative to larger, more crystalline nanoparticles. Conversely, the larger, more crystalline HA nanoparticles stimulate enhanced expression of the osteolytic factor interleukin-8 (IL-8). Our data suggest an important role for nanoscale HA properties in the vicious cycle of bone metastasis and indicate that mineral-containing tumor models may be excellent tools to study cancer biology and to define design parameters for non-tumorigenic mineral-containing or mineralized matrices for bone regeneration.
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Affiliation(s)
- Siddharth P Pathi
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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Abstract
In nature, organic matrix macromolecules play a critical role in enhancing the mechanical properties of biomineralized composites such as bone and teeth. Designing artificial matrix analogues is promising but challenging because relatively little is known about how natural matrix components function. Therefore, in lieu of using natural components, we created biomimetic matrices using genetically engineered elastin-like polypeptides (ELPs) and then used them to construct mechanically robust ELP-hydroxyapatite (HAP) composites. ELPs were engineered with well-defined backbone charge distributions by periodic incorporation of negative, positive, or neutral side chains or with HAP-binding octaglutamic acid motifs at one or both protein termini. ELPs exhibited sequence-specific capacities to interact with ions, bind HAP, and disperse HAP nanoparticles. HAP-binding ELPs were incorporated into calcium phosphate cements, resulting in materials with improved mechanical strength, injectability, and antiwashout properties. The results demonstrate that rational design of genetically engineered polymers is a powerful system for determining sequence-property relationships and for improving the properties of organic-inorganic composites. Our approach may be used to further develop novel, multifunctional bone cements and expanded to the design of other advanced composites.
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Affiliation(s)
- Eddie Wang
- Department of Bioengineering, University of California, Berkeley, Physical Biosciences Division, Lawrence Berkeley National Laboratory, and Berkeley Nanoscience and Nanoengineering Institute, Berkeley, CA, 94720 USA
| | - Sang-Hyuk Lee
- Department of Bioengineering, University of California, Berkeley, Physical Biosciences Division, Lawrence Berkeley National Laboratory, and Berkeley Nanoscience and Nanoengineering Institute, Berkeley, CA, 94720 USA
| | - Seung-Wuk Lee
- Department of Bioengineering, University of California, Berkeley, Physical Biosciences Division, Lawrence Berkeley National Laboratory, and Berkeley Nanoscience and Nanoengineering Institute, Berkeley, CA, 94720 USA
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Rychly J. Biointerface Technology. Regen Med 2011. [DOI: 10.1007/978-90-481-9075-1_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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