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Litvak M, Shamanaev A, Zalawadiya S, Matafonov A, Kobrin A, Feener EP, Wallisch M, Tucker EI, McCarty OJT, Gailani D. Titanium is a potent inducer of contact activation: implications for intravascular devices. J Thromb Haemost 2023; 21:1200-1213. [PMID: 36696212 PMCID: PMC10621279 DOI: 10.1016/j.jtha.2022.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/07/2022] [Accepted: 12/15/2022] [Indexed: 01/09/2023]
Abstract
BACKGROUND Titanium (Ti) and its alloys are widely used in manufacturing medical devices because of their strength and resistance to corrosion. Although Ti compounds are considered compatible with blood, they appear to support plasma contact activation and may be thrombogenic. OBJECTIVES The objective of this study was to compare Ti and titanium nitride (TiN) with known activators of contact activation (kaolin and silica) in plasma-clotting assays and to assess binding and activation of factor XII, (FXII), factor XI (FXI), prekallikrein, and high-molecular-weight kininogen (HK) with Ti/TiN. METHODS Ti-based nanospheres and foils were compared with kaolin, silica, and aluminum in plasma-clotting assays. Binding and activation of FXII, prekallikrein, HK, and FXI to surfaces was assessed with western blots and chromogenic assays. RESULTS Using equivalent surface amounts, Ti and TiN were comparable with kaolin and superior to silica, for inducing coagulation and FXII autoactivation. Similar to many inducers of contact activation, Ti and TiN are negatively charged; however, their effects on FXII are not neutralized by the polycation polybrene. Antibodies to FXII, prekallikrein, or FXI or coating Ti with poly-L-arginine blocked Ti-induced coagulation. An antibody to FXII reduced FXII and PK binding to Ti, kallikrein generation, and HK cleavage. CONCLUSION Titanium compounds induce contact activation with a potency comparable with that of kaolin. Binding of FXII with Ti shares some features with FXII binding to soluble polyanions but may have unique features. Inhibitors targeting FXII or FXI may be useful in mitigating Ti-induced contact activation in patients with titanium-based implants that are exposed to blood.
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Affiliation(s)
- Maxim Litvak
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Aleksandr Shamanaev
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sandip Zalawadiya
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Anton Matafonov
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Anton Kobrin
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Edward P Feener
- KalVista Pharmaceuticals, Inc., Cambridge, Massachusetts, USA
| | - Michael Wallisch
- Aronora, Inc., Portland, Oregon, USA; Department of Biomedical Engineering, Oregon Health & Science University, Oregon, USA
| | - Erik I Tucker
- Aronora, Inc., Portland, Oregon, USA; Department of Biomedical Engineering, Oregon Health & Science University, Oregon, USA
| | - Owen J T McCarty
- Department of Biomedical Engineering, Oregon Health & Science University, Oregon, USA
| | - David Gailani
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
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Fromell K, Johansson U, Abadgar S, Bourzeix P, Lundholm L, Elihn K. The effect of airborne Palladium nanoparticles on human lung cells, endothelium and blood - A combinatory approach using three in vitro models. Toxicol In Vitro 2023; 89:105586. [PMID: 36931534 DOI: 10.1016/j.tiv.2023.105586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 02/24/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
A better understanding of the mechanisms behind adverse health effects caused by airborne fine particles and nanoparticles (NP) is essential to improve risk assessment and identification the most critical particle exposures. While the use of automobile catalytic converters is decreasing the exhausts of harmful gases, concentrations of fine airborne particles and nanoparticles (NPs) from catalytic metals such as Palladium (Pd) are reaching their upper safe level. Here we used a combinatory approach with three in vitro model systems to study the toxicity of Pd particles, to infer their potential effects on human health upon inhalation. The three model systems are 1) a lung system with human lung cells (ALI), 2) an endothelial cell system and 3) a human whole blood loop system. All three model systems were exposed to the exact same type of Pd NPs. The ALI lung cell exposure system showed a clear reduction in cell growth from 24 h onwards and the effect persisted over a longer period of time. In the endothelial cell model, Pd NPs induced apoptosis, but not to the same extent as the most aggressive types of NPs such as TiO2. Similarly, Pd triggered clear coagulation and contact system activation but not as forcefully as the highly thrombogenic TiO2 NPs. In summary, we show that our 3-step in vitro model of the human lung and surrounding vessels can be a useful tool for studying pathological events triggered by airborne fine particles and NPs.
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Affiliation(s)
- Karin Fromell
- Department of Immunology, Genetics and Pathology, Rudbeck laboratory C5:3, Uppsala university, SE-751 85 Uppsala, Sweden.
| | - Ulrika Johansson
- Department of Immunology, Genetics and Pathology, Rudbeck laboratory C5:3, Uppsala university, SE-751 85 Uppsala, Sweden; Linnæus Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden
| | - Sophia Abadgar
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden; Department of Environmental Science, Stockholm University, 106 91 Stockholm, Sweden
| | - Pauline Bourzeix
- Department of Immunology, Genetics and Pathology, Rudbeck laboratory C5:3, Uppsala university, SE-751 85 Uppsala, Sweden
| | - Lovisa Lundholm
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Karine Elihn
- Department of Environmental Science, Stockholm University, 106 91 Stockholm, Sweden
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Varghese J, Rajagopal A, Shanmugasundaram S. Role of Biomaterials Used for Periodontal Tissue Regeneration-A Concise Evidence-Based Review. Polymers (Basel) 2022; 14:3038. [PMID: 35956553 PMCID: PMC9370319 DOI: 10.3390/polym14153038] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/04/2022] [Accepted: 07/06/2022] [Indexed: 12/14/2022] Open
Abstract
Periodontal infections are noncommunicable chronic inflammatory diseases of multifactorial origin that can induce destruction of both soft and hard tissues of the periodontium. The standard remedial modalities for periodontal regeneration include nonsurgical followed by surgical therapy with the adjunctive use of various biomaterials to achieve restoration of the lost tissues. Lately, there has been substantial development in the field of biomaterial, which includes the sole or combined use of osseous grafts, barrier membranes, growth factors and autogenic substitutes to achieve tissue and bone regeneration. Of these, bone replacement grafts have been widely explored for their osteogenic potential with varied outcomes. Osseous grafts are derived from either human, bovine or synthetic sources. Though the biologic response from autogenic biomaterials may be better, the use of bone replacement synthetic substitutes could be practical for clinical practice. This comprehensive review focuses initially on bone graft replacement substitutes, namely ceramic-based (calcium phosphate derivatives, bioactive glass) and autologous platelet concentrates, which assist in alveolar bone regeneration. Further literature compilations emphasize the innovations of biomaterials used as bone substitutes, barrier membranes and complex scaffold fabrication techniques that can mimic the histologically vital tissues required for the regeneration of periodontal apparatus.
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Affiliation(s)
- Jothi Varghese
- Department of Periodontology, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal 576104, India; (A.R.); (S.S.)
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Bawale R, Choudhry B, Samsani S. Mid-term outcomes of tantalum cup- a single centre study. ARTHROPLASTY 2021; 3:42. [PMID: 35236498 PMCID: PMC8796520 DOI: 10.1186/s42836-021-00099-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 09/17/2021] [Indexed: 12/30/2022] Open
Abstract
Introduction The cementless acetabular implants are commonly used in primary and revision hip arthroplasty. Reconstruction of acetabulum in case of bone defects can be challenging. The aims of this single center study are to review the mid-term outcomes of porous tantalum cups (TM) and evaluate complications. Methods The midterm outcome of a trabecular metal tantalum modular uncemented cup was evaluated in 59 hips in 58 patients. In our group, we had 23 males and 35 females. The mean age was 70.11 years (range, 30 to 87 years). Four patients were lost to follow-up and 13 died during the period without having further surgeries attributed to the hip arthroplasty. The remaining 41 patients (42 revision hip arthroplasties) had complete data available. Results The mean follow-up was 87 months, ranging from 24 to 144 months. Standard pelvic anteroposterior (AP) radiographs were used to assess and preoperatively classify acetabular defects as per Paprosky classification. The serial radiographs showed excellent stability, bone opposition and graft incorporation. Four patients had further surgeries. Two of these were due to infection (one superficial and one deep infection). One of the patients had washout and then removal of metal work, the other patient only had a washout and symptoms settled. One patient had vascular compromise and went for surgery to stem the bleeding. One patient had re-revision due to stem loosening and hence required surgery but the revision cup remained stable. We noted a 96% survival at an average of 7.2 years follow-up. Conclusion The mid-term results with the trabecular metal cementless cup appeared to be promising in both primary and revision hip arthroplasty, even in the presence of considerable bone loss which requires bone grafting and augments. Level of evidence IV.
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Affiliation(s)
- Rajesh Bawale
- Department of Trauma and Orthopaedics, Medway Maritime Hospital, Windmill Road, Gillingham, ME7 5NY, UK. .,, Chigwell, UK.
| | - Baseem Choudhry
- Department of Trauma and Orthopaedics, Medway Maritime Hospital, Windmill Road, Gillingham, ME7 5NY, UK
| | - Srinivasa Samsani
- Department of Trauma and Orthopaedics, Medway Maritime Hospital, Windmill Road, Gillingham, ME7 5NY, UK
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Romero-Gavilán F, Cerqueira A, Anitua E, Tejero R, García-Arnáez I, Martinez-Ramos C, Ozturan S, Izquierdo R, Azkargorta M, Elortza F, Gurruchaga M, Goñi I, Suay J. Protein adsorption/desorption dynamics on Ca-enriched titanium surfaces: biological implications. J Biol Inorg Chem 2021; 26:715-726. [PMID: 34453217 PMCID: PMC8437886 DOI: 10.1007/s00775-021-01886-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 07/17/2021] [Indexed: 12/17/2022]
Abstract
Calcium ions are used in the development of biomaterials for the promotion of coagulation, bone regeneration, and implant osseointegration. Upon implantation, the time-dependent release of calcium ions from titanium implant surfaces modifies the physicochemical characteristics at the implant-tissue interface and thus, the biological responses. The aim of this study is to examine how the dynamics of protein adsorption on these surfaces change over time. Titanium discs with and without Ca were incubated with human serum for 2 min, 180 min, and 960 min. The layer of proteins attached to the surface was characterised using nLC-MS/MS. The adsorption kinetics was different between materials, revealing an increased adsorption of proteins associated with coagulation and immune responses prior to Ca release. Implant-blood contact experiments confirmed the strong coagulatory effect for Ca surfaces. We employed primary human alveolar osteoblasts and THP-1 monocytes to study the osteogenic and inflammatory responses. In agreement with the proteomic results, Ca-enriched surfaces showed a significant initial inflammation that disappeared once the calcium was released. The distinct protein adsorption/desorption dynamics found in this work demonstrated to be useful to explain the differential biological responses between the titanium and Ca-ion modified implant surfaces.
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Affiliation(s)
- Francisco Romero-Gavilán
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Campus del Ríu Sec, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain.
| | - Andreia Cerqueira
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Campus del Ríu Sec, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Eduardo Anitua
- BTI Biotechnology Institute I+D, C/ Leonardo da Vinci 14B, 01510, Miñano, Spain.,University Institute of Regenerative Medicine and Oral Implantology (UIRMI), University of the Basque Country (UPV/EHU), C/ Jacinto Quincoces, 39, 01007, Vitoria, Spain.,Private Practice in Oral Implantology, C/Jose Maria Cagigal, 19, 01007, Vitoria, Spain
| | - Ricardo Tejero
- BTI Biotechnology Institute I+D, C/ Leonardo da Vinci 14B, 01510, Miñano, Spain.,University Institute of Regenerative Medicine and Oral Implantology (UIRMI), University of the Basque Country (UPV/EHU), C/ Jacinto Quincoces, 39, 01007, Vitoria, Spain
| | - Iñaki García-Arnáez
- Facultad de Ciencias Químicas, Universidad del País Vasco, P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Cristina Martinez-Ramos
- Center for Biomaterials and Tissue Engineering, Universitat Politècnica de Valencia, Camino de Vera, s/n, 46022, Valencia, Spain
| | - Seda Ozturan
- Department of Periodontology, Faculty of Dentistry, Istanbul Medeniyet University, Istanbul, Turkey
| | - Raul Izquierdo
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Campus del Ríu Sec, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Mikel Azkargorta
- Proteomics Platform, CIBERehd, ProteoRed-ISCIII, CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - Félix Elortza
- Proteomics Platform, CIBERehd, ProteoRed-ISCIII, CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - Mariló Gurruchaga
- Facultad de Ciencias Químicas, Universidad del País Vasco, P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Isabel Goñi
- Facultad de Ciencias Químicas, Universidad del País Vasco, P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Julio Suay
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Campus del Ríu Sec, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
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Svensson FG, Manivel VA, Seisenbaeva GA, Kessler VG, Nilsson B, Ekdahl KN, Fromell K. Hemocompatibility of Nanotitania-Nanocellulose Hybrid Materials. NANOMATERIALS 2021; 11:nano11051100. [PMID: 33923181 PMCID: PMC8146062 DOI: 10.3390/nano11051100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/18/2021] [Accepted: 04/21/2021] [Indexed: 01/01/2023]
Abstract
In order to develop a new type of improved wound dressing, we combined the wound healing properties of nanotitania with the advantageous dressing properties of nanocellulose to create three different hybrid materials. The hemocompatibility of the synthesized hybrid materials was evaluated in an in vitro human whole blood model. To our knowledge, this is the first study of the molecular interaction between hybrid nanotitania and blood proteins. Two of the hybrid materials prepared with 3 nm colloidal titania and 10 nm hydrothermally synthesized titania induced strong coagulation and platelet activation but negligible complement activation. Hence, they have great potential as a new dressing for promoting wound healing. Unlike the other two, the third hybrid material using molecular ammonium oxo-lactato titanate as a titania source inhibited platelet consumption, TAT generation, and complement activation, apparently via lowered pH at the surface interface. It is therefore suitable for applications where a passivating surface is desired, such as drug delivery systems and extracorporeal circuits. This opens the possibility for a tailored blood response through the surface functionalization of titania.
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Affiliation(s)
- Fredric G. Svensson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (F.G.S.); (G.A.S.); (V.G.K.)
| | - Vivek Anand Manivel
- Rudbeck Laboratory C5:3, Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden; (V.A.M.); (B.N.); (K.N.E.)
| | - Gulaim A. Seisenbaeva
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (F.G.S.); (G.A.S.); (V.G.K.)
| | - Vadim G. Kessler
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (F.G.S.); (G.A.S.); (V.G.K.)
| | - Bo Nilsson
- Rudbeck Laboratory C5:3, Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden; (V.A.M.); (B.N.); (K.N.E.)
| | - Kristina N. Ekdahl
- Rudbeck Laboratory C5:3, Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden; (V.A.M.); (B.N.); (K.N.E.)
- Linnæus Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden
| | - Karin Fromell
- Rudbeck Laboratory C5:3, Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden; (V.A.M.); (B.N.); (K.N.E.)
- Correspondence:
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Anitua E, Cerqueira A, Romero-Gavilán F, García-Arnáez I, Martinez-Ramos C, Ozturan S, Azkargorta M, Elortza F, Gurruchaga M, Goñi I, Suay J, Tejero R. Influence of calcium ion-modified implant surfaces in protein adsorption and implant integration. Int J Implant Dent 2021; 7:32. [PMID: 33880662 PMCID: PMC8058122 DOI: 10.1186/s40729-021-00314-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 03/01/2021] [Indexed: 12/26/2022] Open
Abstract
Background Calcium (Ca) is a well-known element in bone metabolism and blood coagulation. Here, we investigate the link between the protein adsorption pattern and the in vivo responses of surfaces modified with calcium ions (Ca-ion) as compared to standard titanium implant surfaces (control). We used LC–MS/MS to identify the proteins adhered to the surfaces after incubation with human serum and performed bilateral surgeries in the medial section of the femoral condyles of 18 New Zealand white rabbits to test osseointegration at 2 and 8 weeks post-implantation (n=9). Results Ca-ion surfaces adsorbed 181.42 times more FA10 and 3.85 times less FA12 (p<0.001), which are factors of the common and the intrinsic coagulation pathways respectively. We also detected differences in A1AT, PLMN, FA12, KNG1, HEP2, LYSC, PIP, SAMP, VTNC, SAA4, and CFAH (p<0.01). At 2 and 8 weeks post-implantation, the mean bone implant contact (BIC) with Ca-ion surfaces was respectively 1.52 and 1.25 times higher, and the mean bone volume density (BVD) was respectively 1.35 and 1.13 times higher. Differences were statistically significant for BIC at 2 and 8 weeks and for BVD at 2 weeks (p<0.05). Conclusions The strong thrombogenic protein adsorption pattern at Ca-ion surfaces correlated with significantly higher levels of implant osseointegration. More effective implant surfaces combined with smaller implants enable less invasive surgeries, shorter healing times, and overall lower intervention costs, especially in cases of low quantity or quality of bone. Supplementary Information The online version contains supplementary material available at 10.1186/s40729-021-00314-1.
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Affiliation(s)
- Eduardo Anitua
- University Institute of Regenerative Medicine and Oral Implantology (UIRMI), University of the Basque Country (UPV-EHU), C/ Jacinto Quincoces, 39, 01007, Vitoria, Spain
| | - Andreia Cerqueira
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Francisco Romero-Gavilán
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Iñaki García-Arnáez
- Faculty of Chemical Sciences, University of the Basque Country (UPV-EHU), P.M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Cristina Martinez-Ramos
- Center for Biomaterials and Tissue Engineering, Universitat Politècnica de Valencia, Camino de Vera, s/n, 46022, Valencia, Spain
| | - Seda Ozturan
- Department of Periodontology, Faculty of Dentistry, Istambul Medeniyet University, Istanbul, Turkey
| | - Mikel Azkargorta
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - Félix Elortza
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - Mariló Gurruchaga
- Faculty of Chemical Sciences, University of the Basque Country (UPV-EHU), P.M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Isabel Goñi
- Faculty of Chemical Sciences, University of the Basque Country (UPV-EHU), P.M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - Julio Suay
- Department of Industrial Systems Engineering and Design, Universitat Jaume I, Av. Vicent Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Ricardo Tejero
- University Institute of Regenerative Medicine and Oral Implantology (UIRMI), University of the Basque Country (UPV-EHU), C/ Jacinto Quincoces, 39, 01007, Vitoria, Spain.
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Pham MH, Haugen HJ, Reseland JE. Fluoride Modification of Titanium Surfaces Enhance Complement Activation. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E684. [PMID: 32028745 PMCID: PMC7040644 DOI: 10.3390/ma13030684] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/25/2020] [Accepted: 01/29/2020] [Indexed: 11/18/2022]
Abstract
Immediately after dental implant insertion, blood will be in direct contact and interact with the implant surface and activates inflammatory responses and complement cascades within seconds. The aim of the present study was to determine the ability of fluoride-modified titanium surfaces to activate complement cascades using the human buffy coat as model. The buffy coats were exposed to hydrofluoric acid-modified surfaces for a short time and its responses were compared to controls. Identification and quantification of complement cascade biomarkers were conducted using ELISA kits and multianalyte profiling using Luminex. A lower level of C3 at 30 min and increased levels of C4, MIP-4, CRP, and pigment epithelium-derived factor at 360 min were found on modified surfaces as compared to controls. We found no significant differences in the levels of C3a, C5a, C Factor H, α2M, ApoA1, ApoC3, ApoE, Prealbumin, α1AT, and SAP in modified surfaces in the buffy coats. We conclude that titanium surfaces treated with hydrofluoric acid modify the levels of specific biomarkers related to the complement cascade and angiogenesis and, thus, tissue growth, remodeling and repair, as this may play a role in the enhanced clinical performance of fluoride-modified Ti dental implants.
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Affiliation(s)
| | | | - Janne E. Reseland
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway
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Wang Y, Lan H, Yin T, Zhang X, Huang J, Fu H, Huang J, McGinty S, Gao H, Wang G, Wang Z. Covalent immobilization of biomolecules on stent materials through mussel adhesive protein coating to form biofunctional films. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 106:110187. [PMID: 31753395 DOI: 10.1016/j.msec.2019.110187] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 10/22/2018] [Accepted: 09/09/2019] [Indexed: 11/16/2022]
Abstract
It is widely accepted that surface biofunctional modification may be an effective approach to improve biocompatibility and confer new bioactive properties on biomaterials. In this work, mussel adhesive protein (MAP) was applied as a coating on 316 L stainless steel substrates (316 L SS) and stents, and then either immobilized VEGF or CD34 antibody were added to create biofunctional films. The properties of the MAP coating were characterized by scanning electron microscope (SEM), atomic force microscope (AFM) and a water contact angle test. Universal tensile testing showed that the MAP coating has adequate adhesion strength on a 316 L stainless steel material surface. Subsequent cytotoxicity and hemolysis rate tests showed that the MAP coatings have good biocompatibility. Moreover, using N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride and N-hydroxysulfosussinimide (EDC/NHS) chemistry, VEGF and CD34 antibody were immobilized on the MAP coatings. The amount and immobilized yield of VEGF on the MAP coatings were analyzed by enzyme-linked immuno-assays (ELISA). Finally, an endothelial cells culture showed that the VEGF biofunctional film can promote the viability and proliferation of endothelial cells. An in vitro CD34+ cells capturing test also verified the bioactive properties of the CD34 antibody coated stents. These results showed that the MAP coatings allowed effective biomolecule immobilization, providing a promising platform for vascular device modification.
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Affiliation(s)
- Yi Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China
| | - Hualin Lan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China
| | - Tieying Yin
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China.
| | - Xiaojuan Zhang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China
| | - Junyang Huang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China
| | - Haiyang Fu
- Laboratory of Biomaterials and Tissues Engineering, National Institutes for Food and Drug Control, Beijing, China
| | - Junli Huang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China
| | - Sean McGinty
- Division of Biomedical Engineering, University of Glasgow, Glasgow, UK
| | - Hao Gao
- School of Mathematics and Statistics, University of Glasgow, Glasgow, UK
| | - Guixue Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, College of Bioengineering at Chongqing University, Chongqing, China.
| | - Zhaoxu Wang
- Laboratory of Biomaterials and Tissues Engineering, National Institutes for Food and Drug Control, Beijing, China.
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A review of materials for managing bone loss in revision total knee arthroplasty. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109941. [PMID: 31500053 DOI: 10.1016/j.msec.2019.109941] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 06/14/2019] [Accepted: 07/02/2019] [Indexed: 12/25/2022]
Abstract
In 2014-2015, 61,421 total knee arthroplasties (TKAs) were performed in Canada; an increase of about 20% over 2000-2001. Revision total knee arthroplasties (rTKAs) accounted for 6.8% of TKAs performed between 2014 and 2015, and this is estimated to grow another 12% by 2025. rTKAs are typically more complicated than primary TKAs due to the significant loss of femoral and tibial bone stock. The escalating demand and limitations associated with total knee arthroplasty and their revision drives the development of novel treatments. A variety of materials have been utilized to facilitate regeneration of healthy bone around the site of a knee arthroplasty. The selection of these materials is based on the bone defect size and includes bone grafts, graft substitutes and cements. However, all these materials have certain disadvantages such as blood loss, disease transmission (bone grafts), inflammatory response, insufficient mechanical properties (bone graft substitutes) thermal necrosis and stress shielding (bone cement). Recently, the use of metal augments for large bone defects has attracted attention, however they can undergo fretting, corrosion, and stress shielding. All things considered, this review indicates the necessity of developing augments that have structural integrities and biodegradation rates similar to that of human bone. Therefore, the future of bone loss management may lie in fabricating novel bioactive glass augments as they can promote bone healing and implant stability and can degrade with time.
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11
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Hulsart-Billström G, Janson O, Engqvist H, Welch K, Hong J. Thromboinflammation as bioactivity assessment of H 2O 2-alkali modified titanium surfaces. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:66. [PMID: 31127371 PMCID: PMC6534515 DOI: 10.1007/s10856-019-6248-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
The release of growth factors from platelets, mediated by the coagulation and the complement system, plays an important role in the bone formation around implants. This study aimed at exploring the thromboinflammatory response of H2O2-alkali soaked commercially pure titanium grade 2 discs exposed to whole human blood, as a way to assess the bioactivity of the discs. Commercially pure titanium grade 2 discs were modified by soaking in H2O2, NaOH and Ca(OH)2. The platelet aggregation, coagulation activation and complement activation was assessed by exposing the discs to fresh whole blood from human donors. The platelet aggregation was examined by a cell counter and the coagulation and complement activation were assessed by ELISA-measurements of the concentration of thrombin-antithrombin complex, C3a and terminal complement complex. The modified surface showed a statistically significant increased platelet aggregation, coagulation activation and complement activation compared to unexposed blood. The surface also showed a statistically significant increase of coagulation activation compared to PVC. The results of this study showed that the H2O2-alkali soaked surfaces induced a thromboinflammatory response that indicates that the surfaces are bioactive.
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Affiliation(s)
- Gry Hulsart-Billström
- Department of Engineering Sciences, Division of Applied Material Science, Uppsala University, 751 21, Uppsala, Sweden
| | - Oscar Janson
- Department of Engineering Sciences, Division of Applied Material Science, Uppsala University, 751 21, Uppsala, Sweden
| | - Håkan Engqvist
- Department of Engineering Sciences, Division of Applied Material Science, Uppsala University, 751 21, Uppsala, Sweden
| | - Ken Welch
- Department of Engineering Sciences, Division of Nanotechnology and Functional Materials, Uppsala University, 751 21, Uppsala, Sweden
| | - Jaan Hong
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory C5, Uppsala University, 75185, Uppsala, Sweden.
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12
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Yang C, Li J, Zhu C, Zhang Q, Yu J, Wang J, Wang Q, Tang J, Zhou H, Shen H. Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity. Acta Biomater 2019; 89:403-418. [PMID: 30880236 DOI: 10.1016/j.actbio.2019.03.027] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/25/2019] [Accepted: 03/13/2019] [Indexed: 12/11/2022]
Abstract
Tantalum (Ta) has been shown to enhance osseointegration in clinical practice, yet little is known about whether Ta nanofilms can be used as antimicrobial coatings in vivo. A highly biocompatible Ta nanofilm was developed using magnetron sputtering technology to further study the mechanism of its antibacterial effects in vivo and elucidate its potential for clinical translation. The Ta nanofilms exhibited effective antimicrobial activity against soft tissue infections but did not show an intrinsic antimicrobial effect in vitro. This inconsistency between the in vivo and in vitro antimicrobial effects was further investigated using ex vivo models. The Ta nanofilms could enhance the phagocytosis of bacteria by polymorphonuclear neutrophils (PMNs, neutrophils), reduce the lysis of neutrophils and enhance the proinflammatory cytokine release of macrophages. This accumulative enhancement of the local host defenses contributed to the favorable antibacterial effect in vivo. The alleviated osteolysis observed in the presence of the Ta nanofilms in the osteomyelitis model further proved the practicality of this antibacterial strategy in the orthopedic field. In summary, Ta nanofilms show excellent biocompatibility and in vivo antimicrobial activity mediated by the enhancement of local innate immunity and are promising for clinical application. STATEMENT OF SIGNIFICANCE: In this study, Ta nanofilms were deposited on titanium substrate by magnetron sputtering. Ta nanofilms exhibited excellent in vivo and in vitro biocompatibility. In vivo antimicrobial effects of Ta nanofilms were revealed by soft tissue infection and osteomyelitis models, while no direct antibacterial activity was observed in vitro. Comprehensive ex vivo models revealed that Ta nanofilms could enhance the phagocytosis of bacteria by neutrophils, reduce the lysis of neutrophils and promote the release of proinflammatory cytokines from macrophages. This immunomodulatory effect helps host to eliminate bacteria. In contrast to traditional antimicrobial nanocoatings which apply toxic materials to kill bacteria, this work proposes a safe, practical and effective Ta nanofilm immunomodulatory antimicrobial strategy with clinical translational prospect.
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13
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Gomez TW, Gopal RV, Gaffoor FMA, Kumar STR, Girish CS, Prakash R. Comparative evaluation of angiogenesis using a novel platelet-rich product: An in vitro study. J Conserv Dent 2019; 22:23-27. [PMID: 30820078 PMCID: PMC6385567 DOI: 10.4103/jcd.jcd_216_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background: In vivo angiogenesis is normal and vital process in growth and development, wound healing, and formation of granulation tissue wherein new blood vessels form from preexisting vessels as part of revascularization. Platelet-rich products promote wound healing associated with angiogenesis. Biomaterials such as titanium were found to be angiogenic. Unlike in vivo situations, in vitro angiogenesis, study cells, within a controlled environment. Aims: The aim of this study is to evaluate the angiogenic potential of a novel platelet-rich product. Materials and Methods: Blood was drawn from volunteers with informed consent. Blood samples were centrifuged to obtain platelet-rich products. Platelet concentrates prepared were platelet-rich plasma (PRP), platelet-rich fibrin, and a novel platelet-rich product which is titanium-prepared PRP (TPRP), obtained using titanium. The study which compared platelet concentrate was divided into four groups subjected to tissue culture. Phase-contrast microscope was used to determine the rate of growth by cell counting. Statistical Analysis: ANOVA was used for comparison within groups and post hoc for multiple comparisons. Results: TPRP group showed granular ground substance. Group with platelet-rich fibrin (PRF) shows a high rate of growth whereas those with TPRP showed better growth rate when compared to its counterpart, PRP. Conclusions: This is the first study which introduces TPRP. Previous studies have proved that titanium-prepared PRF has better structural quality than its counterpart platelet-rich fibrin. This study concludes that TPRP has better angiogenic potential than its counterpart PRP. Further in vivo studies are needed to promote TPRP as a new generation of platelet products.
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Affiliation(s)
- Treesa William Gomez
- Department of Conservative and Endodontics, Noorul Islam College of Dental Science, Kerala University of Health Sciences, Thiruvananthapuram, Kerala, India
| | - Rajesh V Gopal
- Department of Conservative and Endodontics, Noorul Islam College of Dental Science, Kerala University of Health Sciences, Thiruvananthapuram, Kerala, India
| | - Faisal M A Gaffoor
- Department of Conservative and Endodontics, Noorul Islam College of Dental Science, Kerala University of Health Sciences, Thiruvananthapuram, Kerala, India
| | - Santhosh T R Kumar
- Department of Biotechnology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - C Sabari Girish
- Department of Conservative and Endodontics, Noorul Islam College of Dental Science, Kerala University of Health Sciences, Thiruvananthapuram, Kerala, India
| | - R Prakash
- Department of Biotechnology, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
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14
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Affiliation(s)
- Nils Hailer
- Orthopaedics/Department of Surgical Sciences Uppsala University Hospital
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15
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Ekdahl KN, Teramura Y, Hamad OA, Asif S, Duehrkop C, Fromell K, Gustafson E, Hong J, Kozarcanin H, Magnusson PU, Huber-Lang M, Garred P, Nilsson B. Dangerous liaisons: complement, coagulation, and kallikrein/kinin cross-talk act as a linchpin in the events leading to thromboinflammation. Immunol Rev 2017; 274:245-269. [PMID: 27782319 DOI: 10.1111/imr.12471] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Innate immunity is fundamental to our defense against microorganisms. Physiologically, the intravascular innate immune system acts as a purging system that identifies and removes foreign substances leading to thromboinflammatory responses, tissue remodeling, and repair. It is also a key contributor to the adverse effects observed in many diseases and therapies involving biomaterials and therapeutic cells/organs. The intravascular innate immune system consists of the cascade systems of the blood (the complement, contact, coagulation, and fibrinolytic systems), the blood cells (polymorphonuclear cells, monocytes, platelets), and the endothelial cell lining of the vessels. Activation of the intravascular innate immune system in vivo leads to thromboinflammation that can be activated by several of the system's pathways and that initiates repair after tissue damage and leads to adverse reactions in several disorders and treatment modalities. In this review, we summarize the current knowledge in the field and discuss the obstacles that exist in order to study the cross-talk between the components of the intravascular innate immune system. These include the use of purified in vitro systems, animal models and various types of anticoagulants. In order to avoid some of these obstacles we have developed specialized human whole blood models that allow investigation of the cross-talk between the various cascade systems and the blood cells. We in particular stress that platelets are involved in these interactions and that the lectin pathway of the complement system is an emerging part of innate immunity that interacts with the contact/coagulation system. Understanding the resulting thromboinflammation will allow development of new therapeutic modalities.
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Affiliation(s)
- Kristina N Ekdahl
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden.,Linnaeus Center of Biomaterials Chemistry, Linnaeus University, Kalmar, Sweden
| | - Yuji Teramura
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden.,Department of Bioengineering, The University of Tokyo, Tokyo, Japan
| | - Osama A Hamad
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Sana Asif
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Claudia Duehrkop
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Karin Fromell
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Elisabet Gustafson
- Department of Women's and Children's Health, Uppsala University Hospital, Uppsala, Sweden
| | - Jaan Hong
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Huda Kozarcanin
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Peetra U Magnusson
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden
| | - Markus Huber-Lang
- Department of Orthopedic Trauma, Hand, Plastic and Reconstructive Surgery, University of Ulm, Ulm, Germany
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Faculty of Health and Medical Sciences, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Bo Nilsson
- Department of Immunology, Genetics and Pathology (IGP), Rudbeck Laboratory C5:3, Uppsala University, Uppsala, Sweden.
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16
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Araújo-Gomes N, Romero-Gavilán F, Sánchez-Pérez AM, Gurruchaga M, Azkargorta M, Elortza F, Martinez-Ibañez M, Iloro I, Suay J, Goñi I. Characterization of serum proteins attached to distinct sol-gel hybrid surfaces. J Biomed Mater Res B Appl Biomater 2017; 106:1477-1485. [PMID: 28675640 DOI: 10.1002/jbm.b.33954] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 05/16/2017] [Accepted: 06/15/2017] [Indexed: 12/12/2022]
Abstract
The success of a dental implant depends on its osseointegration, an important feature of the implant biocompatibility. In this study, two distinct sol-gel hybrid coating formulations [50% methyltrimethoxysilane: 50% 3-glycidoxypropyl-trimethoxysilane (50M50G) and 70% methyltrimethoxysilane with 30% tetraethyl orthosilicate (70M30T)] were applied onto titanium implants. To evaluate their osseointegration, in vitro and in vivo assays were performed. Cell proliferation and differentiation in vitro did not show any differences between the coatings. However, four and eight weeks after in vivo implantation, the fibrous capsule area surrounding 50M50G-implant was 10 and 4 times, respectively, bigger than the area of connective tissue surrounding the 70M30T treated implant. Thus, the in vitro results gave no prediction or explanation for the 50M50G-implant failure in vivo. We hypothesized that the first protein layer adhered to the surface may have direct implication in implant osseointegration, and perhaps correlate with the in vivo outcome. Human serum was used for adsorption analysis on the biomaterials, the first layer of serum proteins adhered to the implant surface was analyzed by proteomic analysis, using mass spectrometry (LC-MS/MS). From the 171 proteins identified; 30 proteins were significantly enriched on the 50M50G implant surface. This group comprised numerous proteins of the immune complement system, including several subcomponents of the C1 complement, complement factor H, C4b-binding protein alpha chain, complement C5 and C-reactive protein. This result suggests that these proteins enriched in 50M50G surface might trigger the cascade leading to the formation of the fibrous capsule observed. The implications of these results could open up future possibilities to predict the biocompatibility problems in vivo. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1477-1485, 2018.
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Affiliation(s)
- Nuno Araújo-Gomes
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, Castellón, 12071, Spain.,Departamento de Medicina, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, Castellón, 12071, Spain
| | - Francisco Romero-Gavilán
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, Castellón, 12071, Spain
| | - Ana M Sánchez-Pérez
- Departamento de Medicina, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, Castellón, 12071, Spain
| | - Marilo Gurruchaga
- Facultad de Ciencias Químicas. POLYMAT Universidad del País Vasco, P. M. de Lardizábal 3, San Sebastián, 20018, Spain
| | - Mikel Azkargorta
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, Derio, 48160, Spain
| | - Felix Elortza
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, Derio, 48160, Spain
| | - María Martinez-Ibañez
- Facultad de Ciencias Químicas. POLYMAT Universidad del País Vasco, P. M. de Lardizábal 3, San Sebastián, 20018, Spain
| | - Ibon Iloro
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, Derio, 48160, Spain
| | - Julio Suay
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, Castellón, 12071, Spain
| | - Isabel Goñi
- Facultad de Ciencias Químicas. POLYMAT Universidad del País Vasco, P. M. de Lardizábal 3, San Sebastián, 20018, Spain
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17
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Chen F, Wang G, Griffin JI, Brenneman B, Banda NK, Holers VM, Backos DS, Wu L, Moghimi SM, Simberg D. Complement proteins bind to nanoparticle protein corona and undergo dynamic exchange in vivo. NATURE NANOTECHNOLOGY 2017; 12:387-393. [PMID: 27992410 PMCID: PMC5617637 DOI: 10.1038/nnano.2016.269] [Citation(s) in RCA: 353] [Impact Index Per Article: 50.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 11/03/2016] [Indexed: 05/17/2023]
Abstract
When nanoparticles are intravenously injected into the body, complement proteins deposit on the surface of nanoparticles in a process called opsonization. These proteins prime the particle for removal by immune cells and may contribute toward infusion-related adverse effects such as allergic responses. The ways complement proteins assemble on nanoparticles have remained unclear. Here, we show that dextran-coated superparamagnetic iron oxide core-shell nanoworms incubated in human serum and plasma are rapidly opsonized with the third complement component (C3) via the alternative pathway. Serum and plasma proteins bound to the nanoworms are mostly intercalated into the nanoworm shell. We show that C3 covalently binds to these absorbed proteins rather than the dextran shell and the protein-bound C3 undergoes dynamic exchange in vitro. Surface-bound proteins accelerate the assembly of the complement components of the alternative pathway on the nanoworm surface. When nanoworms pre-coated with human plasma were injected into mice, C3 and other adsorbed proteins undergo rapid loss. Our results provide important insight into dynamics of protein adsorption and complement opsonization of nanomedicines.
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Affiliation(s)
- Fangfang Chen
- Department of Gastrointestinal Surgery, China-Japan Union Hospital, Jilin University, 126 Xiantai Street, Changchun, Jilin 130033, China
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, Colorado 80045, USA
| | - Guankui Wang
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, Colorado 80045, USA
| | - James I. Griffin
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, Colorado 80045, USA
| | - Barbara Brenneman
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, Colorado 80045, USA
| | - Nirmal K. Banda
- Division of Rheumatology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, 1775 Aurora Court, Aurora, Colorado 80045, USA
| | - V. Michael Holers
- Division of Rheumatology, School of Medicine, University of Colorado Denver, Anschutz Medical Campus, 1775 Aurora Court, Aurora, Colorado 80045, USA
| | - Donald S. Backos
- Computational Chemistry and Biology Core Facility, the Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 E. Montview Boulevard, Aurora, Colorado 80045, USA
| | - LinPing Wu
- Centre for Pharmaceutical Nanotechnology and Nanotoxicology, Department of Pharmacy, Faculty of Health and Medical Sciences, Universitetsparken 2, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Seyed Moein Moghimi
- Centre for Pharmaceutical Nanotechnology and Nanotoxicology, Department of Pharmacy, Faculty of Health and Medical Sciences, Universitetsparken 2, University of Copenhagen, DK-2100 Copenhagen, Denmark
- NanoScience Centre, University of Copenhagen, DK-2100 Copenhagen, Denmark
- School of Medicine, Pharmacy and Health, Durham University, Queen’s Campus, Stockton-on-Tees TS17 6BH, UK
| | - Dmitri Simberg
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, Colorado 80045, USA
- Correspondence and requests for materials should be addressed to D.S.
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18
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Schoos MM, Capodanno D, Dangas GD. Antithrombotic Strategies in Valvular and Structural Heart Disease Interventions. Interv Cardiol 2016. [DOI: 10.1002/9781118983652.ch53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
| | | | - George D. Dangas
- Department of Cardiology; Mount Sinai Medical Center; New York NY USA
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19
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Vasconcelos DM, Santos SG, Lamghari M, Barbosa MA. The two faces of metal ions: From implants rejection to tissue repair/regeneration. Biomaterials 2016; 84:262-275. [DOI: 10.1016/j.biomaterials.2016.01.046] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 01/20/2016] [Accepted: 01/21/2016] [Indexed: 12/20/2022]
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20
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Satué M, Monjo M, Ronold HJ, Lyngstadaas SP, Ramis JM. Titanium implants coated with UV-irradiated vitamin D precursor and vitamin E: in vivo performance and coating stability. Clin Oral Implants Res 2016; 28:424-431. [PMID: 26926140 DOI: 10.1111/clr.12815] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2016] [Indexed: 12/19/2022]
Abstract
OBJECTIVES This study aimed at evaluating the biological response of titanium implants coated with UV-irradiated 7-dehydrocholesterol (7-DHC) and vitamin E (VitE) in vivo and analyzing the effects of aging on their stability and bioactivity in vitro. MATERIAL AND METHODS Titanium surfaces were coated with 7-DHC and VitE, UV-irradiated and incubated for 48 h at 23°C to allow cholecalciferol synthesis. The in vivo biological response was tested using a rabbit tibia model after 8 weeks of healing by analyzing the wound fluid and the mRNA levels of several markers at the bone-implant interface (N = 8). The stability of the coating after storage up to 12 weeks was determined using HPLC analysis, and the bioactivity of the stored modified implants was studied by an in vitro study with MC3T3-E1 cells (N = 6). RESULTS A significant increase in gene expression levels of osteocalcin was found in the bone tissue attached to implants coated with the low dose of 7-DHC and VitE, together with a higher ALP activity in the wound fluid. Implants treated with the high dose of 7-DHC and VitE showed increased tissue necrosis and inflammation. Regarding the aging effects, coated implants were stable and bioactive up to 12 weeks when stored at 4°C and avoiding oxygen, light and moisture. CONCLUSION This study demonstrates that Ti implants coated with UV-irradiated 7-DHC and VitE promote in vivo gene expression of bone formation markers and ALP activity, while they keep their osteopromotive potential in vitro and composition when stored up to 12 weeks at 4°C.
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Affiliation(s)
- María Satué
- Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of Balearic Islands, Palma de Mallorca, Spain
| | - Marta Monjo
- Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of Balearic Islands, Palma de Mallorca, Spain.,Instituto de Investigación Sanitaria de Palma, Palma de Mallorca, Spain
| | - Hans Jacob Ronold
- Department of Prosthetics and Oral Function, Institute for Clinical Dentistry, University of Oslo, Oslo, Norway
| | | | - Joana M Ramis
- Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of Balearic Islands, Palma de Mallorca, Spain.,Instituto de Investigación Sanitaria de Palma, Palma de Mallorca, Spain
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21
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Feyerabend F, Wendel HP, Mihailova B, Heidrich S, Agha NA, Bismayer U, Willumeit-Römer R. Blood compatibility of magnesium and its alloys. Acta Biomater 2015. [PMID: 26210283 DOI: 10.1016/j.actbio.2015.07.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
RATIONALE Blood compatibility analysis in the field of biomaterials is a highly controversial topic. Especially for degradable materials like magnesium and its alloys no established test methods are available. OBJECTIVE The purpose of this study was to apply advanced test methodology for the analysis of degrading materials to get a mechanistic insight into the corrosion process in contact with human blood and plasma. METHODS AND RESULTS Pure magnesium and two magnesium alloys were analysed in a modified Chandler-Loop setup. Standard clinical parameters were determined, and a thorough analysis of the resulting implant surface chemistry was performed. The contact of the materials to blood evoked an accelerated inflammatory and cell-induced osteoconductive reaction. Corrosion products formed indicate a more realistic, in vivo like situation. CONCLUSIONS The active regulation of corrosion mechanisms of magnesium alloys by different cell types should be more in the focus of research to bridge the gap between in vitro and in vivo observations and to understand the mechanism of action. This in turn could lead to a better acceptance of these materials for implant applications. STATEMENT OF SIGNIFICANCE The presented study deals with the first mechanistic insights during whole human blood contact and its influence on a degrading magnesium-based biomaterial. The combination of clinical parameters and corrosion layer analysis has been performed for the first time. It could be of interest due to the intended use of magnesium-based stents and for orthopaedic applications for clinical applications. An interest for the readers of Acta Biomaterialia may be given, as one of the first clinically approved magnesium-based devices is a wound-closure device, which is in direct contact with blood. Moreover, for orthopaedic applications also blood contact is of high interest. Although this is not the focus of the manuscript, it could help to rise awareness for potential future applications.
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Affiliation(s)
- Frank Feyerabend
- Helmholtz-Zentrum Geesthacht, Institute of Material Research, Department for Material Design and Characterisation, Max-Planck-Str. 1, 21502 Geesthacht, Germany.
| | - Hans-Peter Wendel
- Department of Cardiovascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Calwerstr. 7/1, 72076 Tuebingen, Germany
| | - Boriana Mihailova
- University of Hamburg, Department of Earth Sciences, Grindelallee 48, 20146 Hamburg, Germany
| | - Stefanie Heidrich
- University of Hamburg, Department of Earth Sciences, Grindelallee 48, 20146 Hamburg, Germany
| | - Nezha Ahmad Agha
- Helmholtz-Zentrum Geesthacht, Institute of Material Research, Department for Material Design and Characterisation, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Ulrich Bismayer
- University of Hamburg, Department of Earth Sciences, Grindelallee 48, 20146 Hamburg, Germany
| | - Regine Willumeit-Römer
- Helmholtz-Zentrum Geesthacht, Institute of Material Research, Department for Material Design and Characterisation, Max-Planck-Str. 1, 21502 Geesthacht, Germany
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22
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Enhanced differentiation of human osteoblasts on Ti surfaces pre-treated with human whole blood. Acta Biomater 2015; 19:180-90. [PMID: 25818948 DOI: 10.1016/j.actbio.2015.03.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 03/02/2015] [Accepted: 03/19/2015] [Indexed: 12/20/2022]
Abstract
Early and effective integration of a metal implant into bone tissue is of crucial importance for its long-term stability. While different material properties including surface roughness and wettability but also initial blood-implant surface interaction are known to influence this osseointegration, implications of the latter process are still poorly understood. In this study, early interaction between blood and the implant surface and how this affects the mechanism of osseointegration were investigated. For this, blood coagulation on a micro-roughened hydrophobic titanium (Ti) surface (SLA-H(phob)) and on a hydrophilic micro-roughened Ti surface with nanostructures (SLActive-H(phil)NS), as well as the effects of whole human blood pre-incubation of these two surfaces on the differentiation potential of primary human bone cells (HBC) was assessed. Interestingly, pre-incubation with blood resulted in a dense fibrin network over the entire surface on SLActive-H(phil)NS but only in single patches of fibrin and small isolated fibre complexes on SLA-H(phob). On SLActive-H(phil)NS, the number of HBCs attaching to the fibrin network was greatly increased and the cells displayed enhanced cell contact to the fibrin network. Notably, HBCs displayed increased expression of the osteogenic marker proteins alkaline phosphatase and collagen-I when cultivated on both surfaces upon blood pre-incubation. Additionally, blood pre-treatment promoted an earlier and enhanced mineralization of HBCs cultivated on SLActive-H(phil)NS compared to SLA-H(phob). The results presented in this study therefore suggest that blood pre-incubation of implant surfaces mimics a more physiological situation, eventually providing a more predictive in vitro model for the evaluation of novel bone implant surfaces.
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Kopf BS, Ruch S, Berner S, Spencer ND, Maniura-Weber K. The role of nanostructures and hydrophilicity in osseointegration:In-vitroprotein-adsorption and blood-interaction studies. J Biomed Mater Res A 2015; 103:2661-72. [DOI: 10.1002/jbm.a.35401] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 12/11/2014] [Accepted: 01/20/2015] [Indexed: 01/15/2023]
Affiliation(s)
- Brigitte S. Kopf
- Department Materials meet Life; Laboratory for Materials Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology; St. Gallen Switzerland
| | - Sylvie Ruch
- Institut Straumann AG; Basel Switzerland
- Department of Materials; Laboratory for Surface Science and Technology; ETH Zurich Switzerland
| | | | - Nicholas D. Spencer
- Department of Materials; Laboratory for Surface Science and Technology; ETH Zurich Switzerland
| | - Katharina Maniura-Weber
- Department Materials meet Life; Laboratory for Materials Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology; St. Gallen Switzerland
- Department Materials meet Life; Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology; St. Gallen Switzerland
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Chen Z, Kang L, Wang Z, Xu F, Gu G, Cui F, Guo Z. Recent progress in the research of biomaterials regulating cell behavior. RSC Adv 2014. [DOI: 10.1039/c4ra05534a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Robotti F, Franco D, Bänninger L, Wyler J, Starck CT, Falk V, Poulikakos D, Ferrari A. The influence of surface micro-structure on endothelialization under supraphysiological wall shear stress. Biomaterials 2014; 35:8479-86. [DOI: 10.1016/j.biomaterials.2014.06.046] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 06/22/2014] [Indexed: 01/06/2023]
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Li XM, Li HZ, Wang SP, Huang HM, Huang HH, Ai HJ, Xu J. MRI-compatible Nb-60Ta-2Zr alloy used for vascular stents: haemocompatibility and its correlation with protein adsorption. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:385-95. [PMID: 25063132 DOI: 10.1016/j.msec.2014.05.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 04/29/2014] [Accepted: 05/23/2014] [Indexed: 02/02/2023]
Abstract
Nb-60Ta-2Zr is a newly developed MRI-compatible alloy used for vascular stents. In this work, its haemocompatibility was investigated, including platelet adhesion (lactate dehydrogenase activity), platelet activation (P-selectin expression), coagulation and haemolysis. For comparison, parallel assessments for these factors were performed for the niobium, tantalum, 316L stainless steel (316L SS) and L605 Co-Cr alloy (L605). In addition, albumin and fibrinogen were selected to examine the correlation of protein adsorption with platelet adhesion and metal surface properties. The propensity for platelet adhesion and activation on the Nb-60Ta-2Zr alloy was at nearly the same level as that for Nb and Ta but was slightly less than those of 316L SS and L605. The mitigated platelet adhesion and activation of the Nb-60Ta-2Zr alloy is associated with its decreased adsorption of fibrinogen. The Nb-60Ta-2Zr alloy has a longer clotting time and exhibits significantly superior thromboresistance than 316L SS and L605. Moreover, the haemolysis rate of the Nb-60Ta-2Zr alloy satisfies the bio-safety requirement of the ISO 10993-4 standard. The favourable haemocompatiblity of the Nb-60Ta-2Zr alloy provides evidence of its good biocompatibility and of its suitability as a candidate stent material.
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Affiliation(s)
- Xiu-Mei Li
- School of Stomatology, China Medical University, 117 Nanjing North Street, Shenyang 110002, China
| | - Hui-Zhe Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Shao-Ping Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Hsun-Miao Huang
- Biomaterials & Electrochemistry Lab, Department of Dentistry, National Yang-Ming University, Taipei City 112, Taiwan
| | - Her-Hsiung Huang
- Biomaterials & Electrochemistry Lab, Department of Dentistry, National Yang-Ming University, Taipei City 112, Taiwan
| | - Hong-Jun Ai
- School of Stomatology, China Medical University, 117 Nanjing North Street, Shenyang 110002, China.
| | - Jian Xu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
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Kundu B, Schlimp CJ, Nürnberger S, Redl H, Kundu SC. Thromboelastometric and platelet responses to silk biomaterials. Sci Rep 2014; 4:4945. [PMID: 24824624 PMCID: PMC4018936 DOI: 10.1038/srep04945] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 04/17/2014] [Indexed: 12/02/2022] Open
Abstract
Silkworm's silk is natural biopolymer with unique properties including mechanical robustness, all aqueous base processing and ease in fabrication into different multifunctional templates. Additionally, the nonmulberry silks have cell adhesion promoting tri-peptide (RGD) sequences, which make it an immensely potential platform for regenerative medicine. The compatibility of nonmulberry silk with human blood is still elusive; thereby, restricts its further application as implants. The present study, therefore, evaluate the haematocompatibility of silk biomaterials in terms of platelet interaction after exposure to nonmulberry silk of Antheraea mylitta using thromboelastometry (ROTEM). The mulberry silk of Bombyx mori and clinically used Uni-Graft W biomaterial serve as references. Shortened clotting time, clot formation times as well as enhanced clot strength indicate the platelet mediated activation of blood coagulation cascade by tested biomaterials; which is comparable to controls.
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Affiliation(s)
- Banani Kundu
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, India
- These authors contributed equally to this work
| | - Christoph J. Schlimp
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
- These authors contributed equally to this work
| | - Sylvia Nürnberger
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - S. C. Kundu
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, India
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Nguyen HTT, Huynh KC, Scharf RE, Stoldt VR. Shear-related fibrillogenesis of fibronectin. Biol Chem 2014; 394:1495-503. [PMID: 24030032 DOI: 10.1515/hsz-2013-0183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 09/10/2013] [Indexed: 11/15/2022]
Abstract
Biomechanical forces can induce the transformation of fibronectin (Fn) from its compact structure to an extended fibrillar state. Adsorption of plasma proteins onto metallic surfaces may also influence their conformation. We used a cone-plate rheometer to investigate the effect of shear and stainless steel on conformational changes of Fn. In control experiments, cones grafted once or twice with polyethylene glycol were used. Plasma Fn was added at concentrations of 50 or 100 μg/ml to bovine serum albumin (BSA)- or Fn-coated plates and subsequently exposed to dynamic shear rates stepwise increasing from 50 to 5000 s-1 within 5 min and subsequently decreasing from 5000 to 50 s-1 within 5 min. The viscosity (mPa s) of Fn solutions was recorded over 10 min. Upon exposure to shear, the viscosity in the sample increased, suggesting conformational changes in Fn. Western blotting and densitometric analyses demonstrated that conformational changes of plasma Fn depended both on shear and protein concentration. However, there was no significant difference in fibril formation between BSA- or Fn-coated plates, suggesting that physical properties of stainless steel and biomechanical forces such as shear can affect the molecular structure of Fn. Our model may provide useful information of surface- and flow-induced alterations of plasma proteins.
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Capodanno D, Tamburino C. Antithrombotic Strategies in Valvular and Structural Heart Disease Interventions: Current Status and Future Directions. Interv Cardiol Clin 2013; 2:635-642. [PMID: 28582190 DOI: 10.1016/j.iccl.2013.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Antithrombotic prophylaxis is the cornerstone of adjunctive pharmacologic therapy in patients undergoing transcatheter intervention for valvular and structural heart disease. However, drugs and doses of antiplatelet and anticoagulant agents are mostly empiric for these indications and typically administered at the operator's discretion. This article describes the rationale for antithrombotic management of patients undergoing transcatheter aortic valve implantation, percutaneous mitral valve repair with the Mitraclip system, patent foramen ovale, and atrial septal defect closure, as well as common strategies for managing antiplatelet and anticoagulant therapy in patients with valvular and structural heart disease undergoing transcatheter procedures.
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Affiliation(s)
- Davide Capodanno
- Cardiovascular Department, Ferrarotto Hospital, University of Catania, Via Citelli 6, Catania 95124, Italy; Excellence Through Newest Advances (ETNA) Foundation, Via Citelli 6, Catania 95124, Italy.
| | - Corrado Tamburino
- Cardiovascular Department, Ferrarotto Hospital, University of Catania, Via Citelli 6, Catania 95124, Italy; Excellence Through Newest Advances (ETNA) Foundation, Via Citelli 6, Catania 95124, Italy
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Pham MH, Landin MA, Tiainen H, Reseland JE, Ellingsen JE, Haugen HJ. The effect of hydrofluoric acid treatment of titanium and titanium dioxide surface on primary human osteoblasts. Clin Oral Implants Res 2013; 25:385-394. [DOI: 10.1111/clr.12150] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Maria H. Pham
- Department of Biomaterials; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
| | - Maria A. Landin
- Department of Biomaterials; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
| | - Hanna Tiainen
- Department of Biomaterials; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
| | - Janne E. Reseland
- Department of Biomaterials; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
| | - Jan Eirik Ellingsen
- Department of Prosthodontics; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
| | - Håvard J. Haugen
- Department of Biomaterials; Institute for Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
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Porous Titanium Granules and Blood for Bone Regeneration around Dental Implants: Report of Four Cases and Review of the Literature. Case Rep Dent 2013; 2013:410515. [PMID: 23533827 PMCID: PMC3606741 DOI: 10.1155/2013/410515] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 02/11/2013] [Indexed: 11/18/2022] Open
Abstract
A regenerative procedure treating a local osseous defect around titanium dental implant using porous titanium granules is described in four patients. Porous titanium granules represent, for maxillofacial surgery, a new alternative in augmenting osseous defects. Its earliest application was in the field of orthopedics for stabilization of tibia plateau fractures and for reoperations in prosthetic fixation of femoral stems. There is emerging scientific evidence regarding titanium for its potential use in the maxillofacial area and porous titanium granules are now commercially available. The scientific background for the osteoconductive use of porous titanium granules is elucidated in this paper and the supporting literature is reviewed.
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Wan G, Lv B, Jin G, Maitz MF, Zhou J, Huang N. Direct correlation of electrochemical behaviors with anti-thrombogenicity of semiconducting titanium oxide films. J Biomater Appl 2013; 28:719-28. [PMID: 23413233 DOI: 10.1177/0885328213476911] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Biomaterials-associated thrombosis is dependent critically upon electrochemical response of fibrinogen on material surface. The relationship between the response and anti-thrombogenicity of biomaterials is not well-established. Titanium oxide appears to have good anti-thrombogenicity and little is known about its underlying essential chemistry. We correlate their anti-thrombogenicity directly to electrochemical behaviors in fibrinogen containing buffer solution. High degree of inherent n-type doping was noted to contribute the impedance preventing charge transfer from fibrinogen into film (namely its activation) and consequently reduced degree of anti-thrombogenicity. The impedance was the result of high donor carrier density as well as negative flat band potential.
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Affiliation(s)
- Guojiang Wan
- 1Key Laboratory of Advanced Technologies of Materials, Ministry of Education, College of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China
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Ekdahl KN, Hong J, Hamad OA, Larsson R, Nilsson B. Evaluation of the blood compatibility of materials, cells, and tissues: basic concepts, test models, and practical guidelines. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 735:257-70. [PMID: 23402033 DOI: 10.1007/978-1-4614-4118-2_18] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Medicine today uses a wide range of biomaterials, most of which make contact with blood permanently or transiently upon implantation. Contact between blood and nonbiological materials or cells or tissue of nonhematologic origin initiates activation of the cascade systems (complement, contact activation/coagulation) of the blood, which induces platelet and leukocyte activation. Although substantial progress regarding biocompatibility has been made, many materials and medical treatment procedures are still associated with severe side effects. Therefore, there is a great need for adequate models and guidelines for evaluating the blood compatibility of biomaterials. Due to the substantial amount of cross talk between the different cascade systems and cell populations in the blood, it is advisable to use an intact system for evaluation. Here, we describe three such in vitro models for the evaluation of the biocompatibility of materials and therapeutic cells and tissues. The use of different anticoagulants and specific inhibitors in order to be able to dissect interactions between the different cascade systems and cells of the blood is discussed. In addition, we describe two clinically relevant medical treatment modalities, the integration of titanium implants and transplantation of islets of Langerhans to patients with type 1 diabetes, whose mechanisms of action we have addressed using these in vitro models.
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Affiliation(s)
- Kristina N Ekdahl
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory C5:3, Uppsala University, SE-751 85 Uppsala, Sweden.
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Orsini E, Salgarello S, Martini D, Bacchelli B, Quaranta M, Pisoni L, Bellei E, Joechler M, Ottani V. Early healing events around titanium implant devices with different surface microtopography: a pilot study in an in vivo rabbit model. ScientificWorldJournal 2012; 2012:349842. [PMID: 22545015 PMCID: PMC3322675 DOI: 10.1100/2012/349842] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 10/21/2011] [Indexed: 11/17/2022] Open
Abstract
In the present pilot study, the authors morphologically investigated sandblasted, acid-etched surfaces (SLA) at very early experimental times. The tested devices were titanium plate-like implants with flattened wide lateral sides and jagged narrow sides. Because of these implant shape and placement site, the device gained a firm mechanical stability but the largest portion of the implant surface lacked direct contact with host bone and faced a wide peri-implant space rich in marrow tissue, intentionally created in order to study the interfacial interaction between metal surface and biological microenvironment. The insertion of titanium devices into the proximal tibia elicited a sequence of healing events. Newly formed bone proceeded through an early distance osteogenesis, common to both surfaces, and a delayed contact osteogenesis which seemed to follow different patterns at the two surfaces. In fact, SLA devices showed a more osteoconductive behavior retaining a less dense blood clot, which might be earlier and more easily replaced, and leading to a surface-conditioning layer which promotes osteogenic cell differentiation and appositional new bone deposition at the titanium surface. This model system is expected to provide a starting point for further investigations which clarify the early cellular and biomolecular events occurring at the metal surface.
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Affiliation(s)
- Ester Orsini
- Department of Human Anatomical Sciences and Physiopathology of Locomotor Apparatus, Human Anatomy Section, University of Bologna, via Irnerio 48, 40126 Bologna, Italy.
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Affiliation(s)
- Katherine M. Buettner
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Ann M. Valentine
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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Wohlfahrt JC, Lyngstadaas SP, Heijl L, Aass AM. Porous titanium granules in the treatment of mandibular Class II furcation defects: a consecutive case series. J Periodontol 2011; 83:61-9. [PMID: 21563949 DOI: 10.1902/jop.2011.100769] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND The osteoconductive potential of titanium is interesting from the perspective of periodontal surgery and reconstitution of osseous defects. The aim of the present consecutive case series is to evaluate a surgical strategy based on the use of porous titanium granules (PTG) in the treatment of Class II buccal furcation defects in mandibular molars in humans. METHODS Surgical intervention with PTG used as a bone graft substitute was performed in 10 patients with 10 mandibular Class II buccal furcation defects. Clinical parameters (probing depth (PD), clinical attachment level (CAL), gingival recession (GR), gingival index (GI), bleeding on probing (BOP), and horizontal and vertical bone sounding) and radiographic measurements of vertical furcation height were compared among baseline (presurgery), 6, and 12 months (post-surgery). The significance level (α) was set at 0.05. RESULTS With respect to vertical and horizontal bone sounding measurements, CAL, and GR, no significant improvements between baseline and the 12-month examination were seen. Both PD and radiographic vertical furcation height were significantly reduced between baseline and 12 months. When comparing the baseline to 12-month data, a significantly lower GI score was seen but the BOP score was unchanged. None of the treated teeth showed radiographic signs of root resorption. CONCLUSION This study suggests that PTG is safe to use in close proximity to root surfaces, but no significant improvements in clinical endpoints of defect resolution were observed.
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Affiliation(s)
- Johan Caspar Wohlfahrt
- Department of Biomaterials, Institute of Clinical Odontology, University of Oslo, Oslo, Norway.
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Guha Thakurta S, Miller R, Subramanian A. Investigation of platelet responses and clotting characteristics of in situ albumin binding surfaces. J Biomater Appl 2010; 26:529-47. [PMID: 20819918 DOI: 10.1177/0885328210377535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The response of biomaterial surfaces when exposed to blood is in part dependent upon the nature and composition of the adsorbed layer of proteins. Surfaces passivated with albumin have been shown to reduce platelet adhesion and activation. In an attempt to develop surfaces that can selectively and specifically bind albumin, silicon-based surfaces were functionalized with linear peptides and chemical ligands that displayed an affinity for albumin. Peptide functionalized surfaces were observed to preferentially bind albumin when compared to human immunoglobulin and human fibrinogen, which possess low densities of surface adsorbed platelets. The platelet morphology was noted to be discoid on the peptide modified surface. Both the unmodified control and SCL functionalized surfaces had high densities of surface adhered platelets with spread out morphology. The peptide and SCL functionalized surfaces were noted to have no impact on PTT and PT clotting times, indicating that the extrinsic and intrinsic pathways were unperturbed by the surfaces generated.
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Affiliation(s)
- Sanjukta Guha Thakurta
- Chemical and Biomolecular Engineering, University of Nebraska Othmer Hall, Lincoln, NE 68588, USA
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Bai Z, Filiaggi MJ, Sanderson RJ, Lohstreter LB, McArthur MA, Dahn JR. Surface characteristics and protein adsorption on combinatorial binary Ti-M (Cr, Al, Ni) and Al-M (Ta, Zr) library films. J Biomed Mater Res A 2010; 92:521-32. [PMID: 19235218 DOI: 10.1002/jbm.a.32398] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Systematic studies of protein adsorption onto metallic biomaterial surfaces are generally lacking. Here, combinatorial binary library films with compositional gradients of Ti(1-x)Cr(x), Ti(1-x)Al(x), Ti(1-x)Ni(x) and Al(1-x)Ta(x), (0 <x < 1) and Al(1-y)Zr(y) (0 < y <0.5) as well as corresponding pure metal films were sputtered onto clean Si surfaces. Bulk and surface chemistry, film microstructure, and surface roughness were subsequently correlated to fibrinogen or albumin adsorption measured using a high throughput wavelength dispersive spectroscopy technique. X-ray diffraction revealed these binary films to have crystalline phases present primarily at either extreme of the compositional library and an amorphous zone dominating along the gradient. These mirror-like films were generally found by atomic force microscopy to have a roughness of less than 8 nm, with any relative increases in roughness consistent with the development of crystalline phases. Surface chemistry by quantitative high-resolution X-ray photoelectron spectroscopy differed significantly from bulk film composition as measured by electron microprobe, with TiO(2) and Al(2)O(3) preferentially forming on the binary film surfaces. Correspondingly, protein adsorption onto these films closely correlated with their surface oxide fractions. Aluminum deposited as either a constant-composition film or as part of a binary library consistently adsorbed the least amount of albumin and fibrinogen, with alumina-enrichment of the surface oxide correlating with this adsorption. Overall, this combinatorial materials approach coupled with high-throughput surface analytical methods provides an efficient method of screening potential metallic biomaterials that may enable as well systematic studies of surface properties driving protein adsorption on these metal / metal oxide systems.
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Affiliation(s)
- Zhijun Bai
- School of Biomedical Engineering, Dalhousie University, 5981 University Avenue, Halifax, Nova Scotia, Canada
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Improving islet transplantation: a road map for a widespread application for the cure of persons with type I diabetes. Curr Opin Organ Transplant 2010; 14:683-7. [PMID: 19779341 DOI: 10.1097/mot.0b013e328332c44c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW The widespread application of replacement therapies for type I diabetes is at present limited by the side-effects of systemic immunosuppression. Results obtained in several animal models show that islet encapsulation can control the rejection process without systemic side-effects. However, results have, in general, been disappointing when transferred to large animal models or to humans. RECENT FINDINGS Growing insights into how cells respond to mechanical forces and surrounding extracellular matrixes indicate that differences in the Young's modulus (the resistance to deformation) between the implanted biomaterial and surrounding tissues induce inflammation and fibrosis. A valid approach would be to select for implantation a tissue having a higher value of the Young's modulus, for example, bone, allowing direct contact with the highly vascularized bone marrow providing nutrient and oxygen support as well as a rapid distribution of released insulin to the systemic circulation. SUMMARY Development of a biochamber with bone-integrating properties will allow initiation of clinical trials with allogeneic human islets, xenogeneic pig islets or insulin-producing cells generated from human embryonic stem cell (hESC)/inducible pluripotent stem cell (iPSC).
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Saeed D, Horvath DJ, Massiello AL, Ootaki Y, Benefit S, Golding LAR, Fukamachi K. Use of zirconia ceramic in the DexAide right ventricular assist device journal bearing. Artif Organs 2009; 34:146-9. [PMID: 19821816 DOI: 10.1111/j.1525-1594.2009.00757.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Our aim was to evaluate the potential use of zirconium oxide (zirconia) as a blood journal bearing material in the DexAide right ventricular assist device. The DexAide titanium stator was replaced by a zirconia stator in several blood pump builds, without changing the remaining pump hardware components. In vitro pump performance and efficiency were evaluated at a predetermined pump speed and flow. Motor power consumption decreased by 20%, and DexAide battery life was extended to over 12 h on two fully charged batteries. The zirconia stator was also successfully evaluated in a severe start/stop test pre- and postexposure of the zirconia to accelerated simulated biologic aging. This study's outcomes indicated the advantages of zirconia as an alternate journal bearing material for the DexAide device.
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Affiliation(s)
- Diyar Saeed
- Department of Biomedical Engineering, Lerner Research Institute, The Cleveland Clinic, Cleveland, OH 44195, USA
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Feyerabend F, Siemers C, Willumeit R, Rösler J. Cytocompatibility of a free machining titanium alloy containing lanthanum. J Biomed Mater Res A 2009; 90:931-9. [DOI: 10.1002/jbm.a.32151] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hulander M, Hong J, Andersson M, Gervén F, Ohrlander M, Tengvall P, Elwing H. Blood interactions with noble metals: coagulation and immune complement activation. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1053-1062. [PMID: 20355891 DOI: 10.1021/am900028e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Noble metals are interesting biomaterials for a number of reasons, e.g., their chemical inertness and relative mechanical softness, silver's long known antimicrobial properties, and the low allergenic response shown by gold. Although important for the final outcome of biomaterials, little is reported about early events between pure noble metals and blood. In this article, we used whole blood in the "slide chamber model" to study the activation of the immune complement activation, generation of thrombin/antithrombin (TAT) complexes, and platelet depletion from blood upon contact with silver (Ag), palladium (Pd), gold (Au), titanium (Ti), and Bactiguard, a commercial nanostructured biomaterial coating comprised of Ag, Pd, and Au. The results show the highest TAT generation and platelet depletion on Ti and Au and lower on Pd, Ag, and the Bactiguard coating. The immune complement factor 3 fragment (C3a) was generated by the surfaces in the following order: Ag > Au > Pd > Bactiguard > Ti. Quartz crystal microbalance adsorption studies with human fibrinogen displayed the highest deposition to Ag and the lowest onto the Bactiguard coating. The adsorbed amounts of fibrinogen did not correlate with thrombogenicity in terms of TAT formation and platelet surface accumulation in blood. The combined results suggest, hence, that noble metal chemistry has a different impact on the protein adsorption properties and general blood compatibility. The low thrombogenic response by the Bactiguard coating cannot be explained by any of the single noble metal properties but is likely a successful combination of the nanostructure, nanogalvanic effects, or combinatory chemical and physical materials properties.
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Affiliation(s)
- Mats Hulander
- Department of Cell and Molecular Biology/Interface Biophysics, Gothenburg University, Medicinaregatan 9E, 41390 Gothenburg, Sweden.
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In vivo expression of osteogenic markers and bone mineral density at the surface of fluoride-modified titanium implants. Biomaterials 2008; 29:3771-80. [DOI: 10.1016/j.biomaterials.2008.06.001] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Accepted: 06/07/2008] [Indexed: 11/18/2022]
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Li WC, Zhang HM, Wang PJ, Xi GM, Wang HQ, Chen Y, Deng ZH, Zhang ZH, Huang TZ. Quantitative Analysis of the Microstructure of Human Umbilical Vein for Assessing Feasibility as Vessel Substitute. Ann Vasc Surg 2008; 22:417-24. [DOI: 10.1016/j.avsg.2007.12.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Revised: 12/05/2007] [Accepted: 12/07/2007] [Indexed: 12/01/2022]
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Thor A, Rasmusson L, Wennerberg A, Thomsen P, Hirsch JM, Nilsson B, Hong J. The role of whole blood in thrombin generation in contact with various titanium surfaces. Biomaterials 2007; 28:966-74. [PMID: 17095084 DOI: 10.1016/j.biomaterials.2006.10.020] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2006] [Accepted: 10/23/2006] [Indexed: 11/30/2022]
Abstract
Understanding of the thrombotic response (activation of the intrinsic coagulation system followed by platelet activation) from blood components upon contact with a titanium dental implant is important and not fully understood. The aims of this study were to evaluate: (1) the thrombogenic response of whole blood, platelet-rich plasma (PRP) and platelet-poor plasma (PPP) in contact with a highly thrombogenic surface as titanium, (2) the thrombogenic response of clinically used surfaces as hydroxyapatite (HA), machined titanium (mTi), TiO2 grit-blasted titanium (TiOB) and fluoride ion-modified grit-blasted titanium (TiOB-F). An in vitro slide chamber model, furnished with heparin, was used in which whole blood, PRP or PPP came in contact with slides of the test surfaces. After incubation (60 min rotation at 22 rpm in a 37 degrees C water bath), blood/plasma was mixed with EDTA or citrate, further centrifuged at +4 degrees C (2200 g at 10 min). Finally, plasma was collected pending analysis. Whole blood in contact with Ti alloy resulted in the binding of platelets to the material surface and in the generation of thrombin-antithrombin (TAT) complexes. With whole blood TAT levels increased 1000-fold compared with PRP and PPP, in which both almost no increase of TAT could be detected. In addition, the platelet activation showed a similar pattern with a 15-fold higher release of beta-TG in whole blood. In the in vitro chamber model with the clinically relevant materials, the fluoride-modified surface (TiOB-F) showed pronounced TAT generation compared with TiOB, mTi and HA. Similar results were achieved for platelet consumption and activation markers of the intrinsic coagulation system. Taken together these results implicate first that whole blood is necessary for sufficient thrombin generation and platelet activation during placement of implants. Second, a fluoride ion modification seems to augment the thrombogenic properties of titanium.
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Affiliation(s)
- Andreas Thor
- Department of Surgical Sciences; Oral & Maxillofacial Surgery, Uppsala University Hospital, SE-751 85 Uppsala, Sweden.
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Bédard E, Rodés-Cabau J, Houde C, Mackey A, Rivest D, Cloutier S, Noël M, Marrero A, Côté JM, Chetaille P, Delisle G, Leblanc MH, Bertrand OF. Enhanced thrombogenesis but not platelet activation is associated with transcatheter closure of patent foramen ovale in patients with cryptogenic stroke. Stroke 2006; 38:100-4. [PMID: 17122434 DOI: 10.1161/01.str.0000251712.55322.69] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE No studies have yet determined whether antiplatelet or anticoagulant therapy is the more appropriate treatment after transcatheter closure of patent foramen ovale (PFO) in patients with cryptogenic stroke. The objective of this study was to prospectively evaluate the presence, degree, and timing of activation of the platelet and coagulation systems after transcatheter closure of PFO in patients with cryptogenic stroke. METHODS Twenty-four consecutive patients (mean age, 44+/-10 years; 11 men) with previous cryptogenic stroke who had undergone successful transcatheter closure of PFO were included in the study. Prothrombin fragment 1+2 (F1+2) and thrombin-antithrombin III (TAT) were used as markers of coagulation activation, and soluble P-selectin and soluble CD40 ligand were used as markers of platelet activation. Measurements of all hemostatic markers were taken at baseline just before the procedure and at 7, 30, and 90 days after device implantation. RESULTS F1+2 and TAT levels increased from 0.41+/-0.16 nmol/L and 2.34+/-1.81 ng/mL, respectively, at baseline to a maximal value of 0.61+/-0.16 nmol/L and 4.34+/-1.83 ng/mL, respectively, at 7 days, gradually returning to baseline levels at 90 days (P<0.001 for both markers). F1+2 and TAT levels at 7 days after PFO closure were higher than those obtained in a group of 25 healthy controls (P<0.001 for both markers). Levels of soluble P-selectin and soluble CD40 ligand did not change at any time after PFO closure. CONCLUSIONS Transcatheter closure of PFO is associated with significant activation of the coagulation system, with no increase in platelet activation markers. These findings raise the question of whether optimal antithrombotic treatment after PFO closure should be short-term anticoagulant rather than antiplatelet therapy.
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Affiliation(s)
- Elisabeth Bédard
- Institut de Cardiologie de Québec-Hôpital Laval, 2725, chemin Sainte-Foy, G1V 4G5 Québec, Canada
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Uchida M, Ito A, Furukawa KS, Nakamura K, Onimura Y, Oyane A, Ushida T, Yamane T, Tamaki T, Tateishi T. Reduced platelet adhesion to titanium metal coated with apatite, albumin–apatite composite or laminin–apatite composite. Biomaterials 2005; 26:6924-31. [PMID: 15967494 DOI: 10.1016/j.biomaterials.2005.04.066] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2005] [Accepted: 04/21/2005] [Indexed: 11/23/2022]
Abstract
Titanium metal coated with apatite (HA-Ti), albumin-apatite composite (AA-Ti) or laminin-apatite composite (LA-Ti) was prepared by the immersion of NaOH- and heat-treated titanium metal in a calcium phosphate solution, or one supplemented with albumin or laminin. Platelet adhesion to the obtained materials under flow conditions was investigated in real time using a cone- and plate-type viscometer and fluorescence labeled platelets. Adhesion and activation of the platelets on the HA-Ti, AA-Ti and LA-Ti were definitely suppressed as compared with those on untreated titanium metal with a mirror surface. Furthermore, the numbers of platelets adhered to AA-Ti and LA-Ti are smaller than those adhered to HA-Ti, although the differences were not statistically significant. These findings suggest that HA-Ti, AA-Ti and LA-Ti, especially AA-Ti and LA-Ti, would exhibit thromboresistance that is superior to commercially pure titanium metal in terms of platelet adhesion.
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Affiliation(s)
- Masaki Uchida
- Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Central 6, Tsukuba, Ibaraki, Japan.
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Maitz MF, Shevchenko N. Plasma-immersion ion-implanted nitinol surface with depressed nickel concentration for implants in blood. J Biomed Mater Res A 2005; 76:356-65. [PMID: 16270338 DOI: 10.1002/jbm.a.30526] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Ion implantation into nitinol had been shown previously to decrease the surface nickel concentration of this alloy and produce a titanium oxide layer. Nothing is known yet about the blood compatibility of this surface and the suitability for implants in the blood vessels, like vascular stents. Nickel depletion of superelastic nitinol was obtained by oxygen or helium plasma-immersion ion implantation. The latter leads to the formation of a nickel-poor titanium-oxide surface with a nanoporous structure, which was used for comparison. Fibrinogen adsorption and conformation changes, blood platelet adhesion, and contact activation of the blood clotting cascade have been checked as in vitro parameters of blood compatibility; metabolic activity and release of cytokines IL-6 and IL-8 from cultured endothelial cells on these surfaces give information about the reaction of the blood vessel wall. The oxygen-ion-implanted nitinol surface adsorbed less fibrinogen on its surface and activated the contact system less than the untreated nitinol surface, but conformation changes of fibrinogen were higher on the oxygen-implanted nitinol. No difference between initial and oxygen-implanted nitinol was found for the platelet adherence, endothelial cell activity, or cytokine release. The nanoporous, helium-implanted nitinol behaved worse than the initial one in most aspects. Oxygen-ion implantation is seen as a useful method to decrease the nickel concentration in the surface of nitinol for cardiovascular applications.
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Affiliation(s)
- Manfred F Maitz
- Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, PF 51 01 19, 01314 Dresden, Germany.
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