1
|
Zheng C, Yang L, Wang Y. Recent progress in functional modification and crosslinking of bioprosthetic heart valves. Regen Biomater 2023; 11:rbad098. [PMID: 38173770 PMCID: PMC10761211 DOI: 10.1093/rb/rbad098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/25/2023] [Accepted: 10/28/2023] [Indexed: 01/05/2024] Open
Abstract
Valvular heart disease (VHD), clinically manifested as stenosis and regurgitation of native heart valve, is one of the most prevalent cardiovascular diseases with high mortality. Heart valve replacement surgery has been recognized as golden standard for the treatment of VHD. Owing to the clinical application of transcatheter heart valve replacement technic and the excellent hemodynamic performance of bioprosthetic heart valves (BHVs), implantation of BHVs has been increasing over recent years and gradually became the preferred choice for the treatment of VHD. However, BHVs might fail within 10-15 years due to structural valvular degeneration (SVD), which was greatly associated with drawbacks of glutaraldehyde crosslinked BHVs, including cytotoxicity, calcification, component degradation, mechanical failure, thrombosis and immune response. To prolong the service life of BHVs, much effort has been devoted to overcoming the drawbacks of BHVs and reducing the risk of SVD. In this review, we summarized and analyzed the research and progress on: (i) modification strategies based on glutaraldehyde crosslinked BHVs and (ii) nonglutaraldehyde crosslinking strategies for BHVs.
Collapse
Affiliation(s)
- Cheng Zheng
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Li Yang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| |
Collapse
|
2
|
Ansari T, Southgate A, Obiri-Yeboa I, Jones LG, Greco K, Olayanju A, Mbundi L, Somasundaram M, Davidson B, Sibbons PD. Development and Characterization of a Porcine Liver Scaffold. Stem Cells Dev 2020; 29:314-326. [PMID: 31854227 DOI: 10.1089/scd.2019.0069] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The growing number of patients requiring liver transplantation for chronic liver disease cannot be currently met due to a shortage in donor tissue. As such, alternative tissue engineering approaches combining the use of acellular biological scaffolds and different cell populations (hepatic or progenitor) are being explored to augment the demand for functional organs. Our goal was to produce a clinically relevant sized scaffold from a sustainable source within 24 h, while preserving the extracellular matrix (ECM) to facilitate cell repopulation at a later stage. Whole porcine livers underwent perfusion decellularization via the hepatic artery and hepatic portal vein using a combination of saponin, sodium deoxycholate, and deionized water washes resulting in an acellular scaffold with an intact vasculature and preserved ECM. Molecular and immunohistochemical analysis (collagen I and IV and laminin) showed complete removal of any DNA material, together with excellent retention of glycosaminoglycans and collagen. Fourier-transform infrared spectroscopy (FTIR) analysis showed both absence of nuclear material and removal of any detergent residue, which was successfully achieved after additional ethanol gradient washes. Samples of the decellularized scaffold were assessed for cytotoxicity by seeding with porcine adipose-derived mesenchymal stem cells in vitro, these cells over a 10-day period showed attachment and proliferation. Perfusion of the vascular tree with contrast media followed by computed tomography (CT) imaging showed an intact vascular network. In vivo implantation of whole intact nonseeded livers, into a porcine model (as auxiliary graft) showed uniform perfusion macroscopically and histologically. Using this method, it is possible to create an acellular, clinically sized, liver scaffold with intact vasculature in less than 24 h.
Collapse
Affiliation(s)
- Tahera Ansari
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Aaron Southgate
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Irene Obiri-Yeboa
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Lauren G Jones
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Karin Greco
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Adedamola Olayanju
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Lubinda Mbundi
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Murali Somasundaram
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| | - Brian Davidson
- Department of Surgery, Royal Free Campus, UCL Medical School, London, United Kingdom
| | - Paul D Sibbons
- Tissue Engineering and Regenerative Medicine, Northwick Park Institute for Medical Research (NPIMR), Harrow, United Kingdom
| |
Collapse
|
3
|
Abstract
Transcatheter aortic valve implantation (TAVI) is a minimally invasive procedure to treat severe symptomatic aortic stenosis. While the TAVI procedure can be performed safely and provide excellent 5-year results, little is known about long-term durability. TAVI valves are composed of bioprosthetic leaflets are prone to deterioration, which are categorized as structural valve deterioration (SVD) and non-SVD. SVD refers to an intrinsic pathology of the leaflets or stent structure with mechanisms that include leaflet calcification, leaflet tear, stent fracture, or stent creep. Non-SVD processes include valve thrombosis, infective endocarditis and patient prosthesis mismatch. TAVI valves degenerate by similar mechanisms as bioprosthetic surgical aortic valves. Unique mechanisms that contribute to TAVI degeneration include valve crimpling, balloon expansion, stent under-expansion and valve thrombosis. The absence of a universally accepted definition of SVD poses a challenge in estimating valve durability. Traditional surgical bioprosthetic aortic valves have demonstrated excellent durability with clinically relevant SVD of 6.6% at 10-year follow up. Long-term durability of TAVI valves, however, remain poorly defined. From meta-analysis TAVI trials, SVD was estimated at 7% at 5 years. With iterative improvements in TAVI valve construction and deployment techniques, long-term durability may improve. Until long-term outcomes are better understood, TAVI should be used with caution in younger patients.
Collapse
Affiliation(s)
- Akash Kataruka
- Division of Cardiology, University of Washington, Seattle, WA, USA
| | - Catherine M Otto
- Division of Cardiology, University of Washington, Seattle, WA, USA
| |
Collapse
|
4
|
Krasilnikova AA, Sergeevichev DS, Fomenko VV, Korobeynikov AA, Vasilyeva MB, Yunoshev AS, Karaskov AM, Pokushalov EA. Globular chitosan treatment of bovine jugular veins: evidence of anticalcification efficacy in the subcutaneous rat model. Cardiovasc Pathol 2017; 32:1-7. [PMID: 29049912 DOI: 10.1016/j.carpath.2017.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/28/2017] [Accepted: 08/31/2017] [Indexed: 12/14/2022] Open
Abstract
Vascular xenografts are widely used in cardiovascular surgery as an alternative to autologous vessels and vascular allografts. Calcification is one of the main drawbacks of vascular grafts, especially among young patients and children. Among different anticalcification approaches, chitosan emerges as a highly promising candidate due to its versatility, natural origin, and biocompatibility. We investigated the anticalcification efficacy of globular chitosan ("Chitozol") as it demonstrated the improved rate of water solubility as compared with conventional linear macromolecules of chitosan. In addition, we supposed that compact globular form of "Chitozol" molecules could provide effective penetration of extracellular matrix of bovine jugular veins (BJVs). Our results revealed that "Chitozol" treatment mitigated calcification in the experimental groups as compared to the control groups (without any treatment, conventional treatment with glutaraldehyde, and commercially available Contegra conduit). Different concentrations of "Chitozol" (0.3% and 3%), as well as different incubation times (15 and 30min), were equally effective in the prevention of calcification. In addition, "Chitozol" treatment with decellularization of BJVs demonstrated slightly improved stress-strain properties of unimplanted samples. Thus, the filling of fresh BJV with globular chitosan is proposed as a promising emerging treatment for the mitigation of calcific degeneration in BJVs xenografts.
Collapse
Affiliation(s)
- Anna A Krasilnikova
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation
| | - David S Sergeevichev
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation.
| | - Vladislav V Fomenko
- Vorozhtsov Institute of Organic Chemistry SB RAS, 9 Akad. Lavrentyev Ave., 630090 Novosibirsk, Russian Federation
| | - Alexander A Korobeynikov
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation
| | - Maria B Vasilyeva
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation
| | - Alexander S Yunoshev
- Lavrentyev Institute of Hydrodynamics SB RAS, 15 Akad. Lavrentyev Ave., 630090 Novosibirsk, Russian Federation
| | - Alexander M Karaskov
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation
| | - Evgeny A Pokushalov
- «E. Meshalkin National Medical Research Center» of the Ministry of Health of the Russian Federation, 15 Rechkunovskaya Str., 630055 Novosibirsk, Russian Federation
| |
Collapse
|
5
|
Vellayappan MV, Balaji A, Subramanian AP, John AA, Jaganathan SK, Murugesan S, Mohandas H, Supriyanto E, Yusof M. Tangible nanocomposites with diverse properties for heart valve application. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:033504. [PMID: 27877785 PMCID: PMC5099822 DOI: 10.1088/1468-6996/16/3/033504] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/04/2015] [Accepted: 04/01/2015] [Indexed: 06/06/2023]
Abstract
Cardiovascular disease claims millions of lives every year throughout the world. Biomaterials are used widely for the treatment of this fatal disease. With the advent of nanotechnology, the use of nanocomposites has become almost inevitable in the field of biomaterials. The versatile properties of nanocomposites, such as improved durability and biocompatibility, make them an ideal choice for various biomedical applications. Among the various nanocomposites, polyhedral oligomeric silsesquioxane-poly(carbonate-urea)urethane, bacterial cellulose with polyvinyl alcohol, carbon nanotubes, graphene oxide and nano-hydroxyapatite nanocomposites have gained popularity as putative choices for biomaterials in cardiovascular applications owing to their superior properties. In this review, various studies performed utilizing these nanocomposites for improving the mechanical strength, anti-calcification potential and hemocompatibility of heart valves are reviewed and summarized. The primary motive of this work is to shed light on the emerging nanocomposites for heart valve applications. Furthermore, we aim to promote the prospects of these nanocomposites in the campaign against cardiovascular diseases.
Collapse
Affiliation(s)
- Muthu Vignesh Vellayappan
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Arunpandian Balaji
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Aruna Priyadarshini Subramanian
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Agnes Aruna John
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Saravana Kumar Jaganathan
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Selvakumar Murugesan
- Rubber Technology Center, Indian Institute of Technology, Kharagpur, 721302, India
| | - Hemanth Mohandas
- Department of Biomedical Engineering, University of Texas Arlington, Texas, TX 76019, USA
| | - Eko Supriyanto
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Mustafa Yusof
- IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| |
Collapse
|
6
|
Harvey L, Bianco R, Lahti M, Carney J, Zhang L, Robinson N. Carpentier-Edwards aortic pericardial bioprosthetic valve as a valid control in preclinical in vivo ovine studies. Eur J Pharmacol 2015; 759:192-9. [PMID: 25814251 DOI: 10.1016/j.ejphar.2015.03.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/27/2015] [Accepted: 03/12/2015] [Indexed: 11/16/2022]
Abstract
To progress into clinical practice, a bioprosthetic heart valve must first pass through the preclinical evaluation phase. The International Standards Organization (ISO) recommends implantation of concurrent controls in any evaluation of a new or modified heart valve. A total of 8 adult sheep underwent aortic valve replacement, receiving either the CE Perimount Magna 3000 aortic pericardial bioprosthetic valve or the CE Perimount RSR aortic pericardial bioprosthetic valve, Model 2800. We performed serial blood sampling, echocardiography, angiography and necropsy after euthanasia. All 8 sheep survived until the end of their study term. Our 2-dimensional echocardiographic analysis showed a mean pressure gradient of 37.4±6.0mmHg at 14 days and 37.0±5.9mmHg at 90 days; mean cardiac output was 10.0±2.8l/min at 14 days and 9.6±1.6l/min at 90 days. Angiography before euthanasia showed a mean aortic transvalvular gradient of 32.3±15.3mmHg. At euthanasia, we saw no evidence of calcification in any of the valves. In our study, we found that both models of the CE bioprosthetic heart valve we tested proved to be valid controls, in the aortic position, in sheep-with no evidence of calcification. Most important, the valves we tested had a few model-related problems, allowing a clear determination of their suitability for introduction into a clinical trial. Investigators now have additional insight into the safety of these 2 models of valves and perhaps will be able to reduce the number of controls implanted.
Collapse
Affiliation(s)
- Laura Harvey
- Department of Surgery, University of Minnesota, Minneapolis, MN, United States
| | - Richard Bianco
- Experimental Surgical Services, Department of Surgery, University of Minnesota, Minneapolis, MN, United States.
| | - Matthew Lahti
- Experimental Surgical Services, Department of Surgery, University of Minnesota, Minneapolis, MN, United States
| | - John Carney
- Experimental Surgical Services, Department of Surgery, University of Minnesota, Minneapolis, MN, United States
| | - Lindsey Zhang
- Experimental Surgical Services, Department of Surgery, University of Minnesota, Minneapolis, MN, United States
| | - Nicholas Robinson
- Experimental Surgical Services, Department of Surgery, University of Minnesota, Minneapolis, MN, United States
| |
Collapse
|
7
|
Mahara A, Sago M, Yamaguchi H, Ehashi T, Minatoya K, Tanaka H, Nakatani T, Moritan T, Fujisato T, Yamaoka T. Micro-CT evaluation of high pressure-decellularized cardiovascular tissues transplanted in rat subcutaneous accelerated-calcification model. J Artif Organs 2014; 18:143-50. [PMID: 25472919 DOI: 10.1007/s10047-014-0808-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 11/23/2014] [Indexed: 01/25/2023]
Abstract
We have succeeded in reducing the calcification of acellular aortas or valves in porcine allogeneic system by removing the DNA and phospholipids, but its further reduction is desirable. Here, the calcification of the acellular tissue was evaluated in rat subcutaneous transplantation model which is known as calcification model. Acellular samples prepared by high-hydrostatic pressure (HHP) protocols with different washing media were implanted and the calcification was monitored under micro-computed tomography for 1 and 3 months. The amount of the calcium deposition was quantitatively evaluated by atomic absorption spectroscopy. A cell culture medium showed very good cell removal ability but led to severe calcification at 1 month, and surprisingly the calcium deposition increased as the washing period increased. This calcification was suppressed by removing the DNA fraction with high DNase concentration. On the other hand, the calcification was greatly reduced when washed with saline even at low DNase concentration after 2 weeks washing. These results suggest that the ion species in the washing medium and the residual DNase cooperatively affect the tendency of in vivo calcification, which led us to the possibility of reduced calcification of acellular cardiac tissues.
Collapse
Affiliation(s)
- Atsushi Mahara
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Arslantunali D, Dursun T, Yucel D, Hasirci N, Hasirci V. Peripheral nerve conduits: technology update. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2014; 7:405-24. [PMID: 25489251 PMCID: PMC4257109 DOI: 10.2147/mder.s59124] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Peripheral nerve injury is a worldwide clinical problem which could lead to loss of neuronal communication along sensory and motor nerves between the central nervous system (CNS) and the peripheral organs and impairs the quality of life of a patient. The primary requirement for the treatment of complete lesions is a tension-free, end-to-end repair. When end-to-end repair is not possible, peripheral nerve grafts or nerve conduits are used. The limited availability of autografts, and drawbacks of the allografts and xenografts like immunological reactions, forced the researchers to investigate and develop alternative approaches, mainly nerve conduits. In this review, recent information on the various types of conduit materials (made of biological and synthetic polymers) and designs (tubular, fibrous, and matrix type) are being presented.
Collapse
Affiliation(s)
- D Arslantunali
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey ; Department of Biotechnology, METU, Ankara, Turkey ; Department of Bioengineering, Gumushane University, Gumushane, Turkey
| | - T Dursun
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey ; Department of Biotechnology, METU, Ankara, Turkey
| | - D Yucel
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey ; Faculty of Engineering, Department of Medical Engineering, Acibadem University, Istanbul, Turkey ; School of Medicine, Department of Histology and Embryology, Acibadem University, Istanbul, Turkey
| | - N Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey ; Department of Biotechnology, METU, Ankara, Turkey ; Department of Chemistry, Faculty of Arts and Sciences, METU, Ankara, Turkey
| | - V Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey ; Department of Biotechnology, METU, Ankara, Turkey ; Department of Biological Sciences, Faculty of Arts and Sciences, METU, Ankara, Turkey
| |
Collapse
|
9
|
Skowasch D, Steinmetz M, Nickenig G, Bauriedel G. Is the degeneration of aortic valve bioprostheses similar to that of native aortic valves? Insights into valvular pathology. Expert Rev Med Devices 2014; 3:453-62. [PMID: 16866642 DOI: 10.1586/17434440.3.4.453] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Aortic stenosis (AS) is the most common valvular disease requiring valve replacement with a prevalence of 2-4% in adults greater than or equal to 65 years of age. There is increasing evidence that AS is an active inflammatory process that is highly regulated, displaying multiple hallmarks of atherosclerosis. Clinically, the definite therapy of advanced AS is prosthetic valve replacement. Herein, bioprosthetic tissue valves (BPs) possess superior thromboresistant and hemodynamic properties compared with mechanical valves. However, cusp degeneration and calcification also limit their long-term outcome. The pathogenesis of BP calcification as well as that of native valves is still poorly understood. Recent studies suggest a similar valvular pathology, that underlies both types of valvular degeneration, but also an even more important role of inflammatory and repair processes in the case of BP degeneration.
Collapse
Affiliation(s)
- Dirk Skowasch
- University of Bonn, Department of Internal Medicine II/Cardiology, Sigmund Freud Str. 25, D-53105 Bonn, Germany.
| | | | | | | |
Collapse
|
10
|
Hrebikova H, Diaz D, Mokry J. Chemical decellularization: a promising approach for preparation of extracellular matrix. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2013; 159:12-7. [PMID: 24145768 DOI: 10.5507/bp.2013.076] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 09/24/2013] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND A biological scaffold from extracellular matrix can be produced by a variety of decellularization methods whose caveat consists in efficiently eliminating cells from the treated tissue. This scaffold can be used in diverse applications for tissue engineering and organ regeneration. Preservation of the extracellular matrix ultrastructure is highly desirable because of its unique architecture, contained growth factors and decreased immunological response. All of these properties provide attachment sites and adequate environment for cells colonizing this scaffold, reconstituting the decellularized organ. This review briefly describes chemical decellularization methods, evaluation of these protocols and the role of ECM in tissue engineering. CONCLUSION Chemical decellularization is an often used method for scaffold preparation and makes possible a well-preserved three dimensional structure of extracellular matrix.
Collapse
Affiliation(s)
- Hana Hrebikova
- Department of Histology and Embryology, Medical Faculty in Hradec Kralove, Charles University in Prague, Simkova 870, Hradec Kralove
| | | | | |
Collapse
|
11
|
Atorvastatin attenuates post-implant tissue degeneration of cardiac prosthetic valve bovine pericardial tissue in a subcutaneous animal model. Int J Cardiol 2010; 141:68-74. [DOI: 10.1016/j.ijcard.2008.11.174] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Accepted: 11/26/2008] [Indexed: 11/19/2022]
|
12
|
Weska RF, Aimoli CG, Nogueira GM, Leirner AA, Maizato MJ, Higa OZ, Polakievicz B, Pitombo RN, Beppu MM. Natural and Prosthetic Heart Valve Calcification: Morphology and Chemical Composition Characterization. Artif Organs 2010; 34:311-8. [DOI: 10.1111/j.1525-1594.2009.00858.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
Gamzazade AI, Bakuleva NP, Belavtseva EM, Gallyamov MO. Electron microscopy of the coating morphology of pericardum tissue with chitosan ionogen derivatives. ACTA ACUST UNITED AC 2009. [DOI: 10.3103/s1062873809040066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
14
|
Complete microbe free processed porcine xenograft for clinical use. Indian J Thorac Cardiovasc Surg 2008. [DOI: 10.1007/s12055-007-0049-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|