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de Sa RCL, de Andrade AJP, Antunes VR, Salvadori C, de Sa Teixeira F, Corat EJ, Moro JR, Bock EGP, Trava-Airoldi VJ. Biofunctionalization of surfaces to minimize undesirable effects in cardiovascular assistance devices. Artif Organs 2024; 48:141-149. [PMID: 38018258 DOI: 10.1111/aor.14683] [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: 06/24/2023] [Revised: 09/16/2023] [Accepted: 11/07/2023] [Indexed: 11/30/2023]
Abstract
BACKGROUND The reactivity of blood with non-endothelial surface is a challenge for long-term Ventricular Assist Devices development, usually made with pure titanium, which despite of being inert, low density and high mechanical resistance it does not avoid the thrombogenic responses. Here we tested a modification on the titanium surface with Laser Induced Periodic Surface Structures followed by Diamond Like Carbon (DLC) coating in different thicknesses to customize the wettability profile by changing the surface energy of the titanium. METHODS Four different surfaces were proposed: (1) Pure Titanium as Reference Material (RM), (2) Textured as Test Sample (TS), (3) Textured with DLC 0.3μm as (TSA) and (4) Textured with 2.4μm DLC as (TSB). A single implant was positioned in the abdominal aorta of Wistar rats and the effects of hemodynamic interaction were evaluated without anticoagulant drugs. RESULTS After twelve weeks, the implants were extracted and subjected to qualitative analysis by Scanning Electron Microscopy under low vacuum and X-ray Energy Dispersion. The regions that remained in contact with the wall of the aorta showed encapsulation of the endothelial tissue. TSB implants, although superhydrophilic, have proven that the DLC coating inhibits the adhesion of biological material, prevents abrasive wear and delamination, as observed in the TS and TSA implants. Pseudo- neointimal layers were heterogeneously identified in higher concentration on Test Surfaces.
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Affiliation(s)
- Rosa Correa Leoncio de Sa
- Laboratory Associated of Materials and Sensors, National Institute for Space Research - INPE, Sao Paulo, Brazil
- Center of Engineering in Circulatory Assistance, Dante Pazzanese Institute of Cardiology - IDPC, Sao Paulo, Brazil
| | - Aron Jose Pazin de Andrade
- Center of Engineering in Circulatory Assistance, Dante Pazzanese Institute of Cardiology - IDPC, Sao Paulo, Brazil
| | - Vagner Roberto Antunes
- Laboratory of Neural Control of Circulation, Department of Physiology and Biophysics, Institute of Biomedical Sciences of the University of Sao Paulo - ICBUSP, Sao Paulo, Brazil
| | - Cecilia Salvadori
- Laboratory of Fine Films, Institute of Physics, University of Sao Paulo - IFUSP, Sao Paulo, Brazil
| | - Fernanda de Sa Teixeira
- Laboratory of Fine Films, Institute of Physics, University of Sao Paulo - IFUSP, Sao Paulo, Brazil
| | - Evaldo Jose Corat
- Laboratory Associated of Materials and Sensors, National Institute for Space Research - INPE, Sao Paulo, Brazil
| | - Joao Roberto Moro
- Federal Institute of Education, Science, and Technology of Sao Paulo - IFSP, Sao Paulo, Brazil
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Phase Equilibria and Structure Formation in the Polylactic-co-Glycolic Acid/Tetraglycol/Water Ternary System. Polymers (Basel) 2023; 15:polym15051281. [PMID: 36904522 PMCID: PMC10007394 DOI: 10.3390/polym15051281] [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: 01/24/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
This paper concerns a detailed study of the phase separation and structure formation processes that occur in solutions of highly hydrophobic polylactic-co-glycolic acid (PLGA) in highly hydrophilic tetraglycol (TG) upon their contact with aqueous media. In the present work, cloud point methodology, high-speed video recording, differential scanning calorimetry, and both optical and scanning electron microscopy were used to analyze the behavior of PLGA/TG mixtures differing in composition when they are immersed in water (the so-called "harsh" antisolvent) or in a nonsolvent consisting of equal amounts of water and TG (a "soft" antisolvent). The phase diagram of the ternary PLGA/TG/water system was designed and constructed for the first time. The PLGA/TG mixture composition with which the polymer undergoes glass transition at room temperature was determined. Our data enabled us to analyze in detail the structure evolution process taking place in various mixtures upon their immersion in "harsh" and "soft" antisolvent baths and gain an insight into the peculiarities of the structure formation mechanism active in the course of antisolvent-induced phase separation in PLGA/TG/water mixtures. This provides intriguing opportunities for the controlled fabrication of a wide variety of bioresorbable structures-from polyester microparticles, fibers, and membranes to scaffolds for tissue engineering.
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Bock E, Pfleging W, Tada D, Macedo E, Premazzi N, Sá R, Solheid J, Besser H, Andrade A. Laser-Treated Surfaces for VADs: From Inert Titanium to Potential Biofunctional Materials. BME FRONTIERS 2022; 2022:9782562. [PMID: 37850160 PMCID: PMC10521651 DOI: 10.34133/2022/9782562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/17/2022] [Indexed: 10/19/2023] Open
Abstract
Objective. Laser-treated surfaces for ventricular assist devices. Impact Statement. This work has scientific impact since it proposes a biofunctional surface created with laser processing in bioinert titanium. Introduction. Cardiovascular diseases are the world's leading cause of death. An especially debilitating heart disease is congestive heart failure. Among the possible therapies, heart transplantation and mechanical circulatory assistance are the main treatments for its severe form at a more advanced stage. The development of biomaterials for ventricular assist devices is still being carried out. Although polished titanium is currently employed in several devices, its performance could be improved by enhancing the bioactivity of its surface. Methods. Aiming to improve the titanium without using coatings that can be detached, this work presents the formation of laser-induced periodic surface structures with a topology suitable for cell adhesion and neointimal tissue formation. The surface was modified by femtosecond laser ablation and cell adhesion was evaluated in vitro by using fibroblast cells. Results. The results indicate the formation of the desired topology, since the cells showed the appropriate adhesion compared to the control group. Scanning electron microscopy showed several positive characteristics in the cells shape and their surface distribution. The in vitro results obtained with different topologies point that the proposed LIPSS would provide enhanced cell adhesion and proliferation. Conclusion. The laser processes studied can create new interactions in biomaterials already known and improve the performance of biomaterials for use in ventricular assist devices.
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Affiliation(s)
- Eduardo Bock
- Laboratory of Bioengineering and Biomaterials, Federal Institute of Technology in Sao Paulo (IFSP), Sao PauloBrazil
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
| | - Wilhelm Pfleging
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Dayane Tada
- Federal University of Sao Paulo (UNIFESP), Sao Jose dos Campos, Brazil
| | - Erenilda Macedo
- Federal University of Sao Paulo (UNIFESP), Sao Jose dos Campos, Brazil
| | - Nathalia Premazzi
- Laboratory of Bioengineering and Biomaterials, Federal Institute of Technology in Sao Paulo (IFSP), Sao PauloBrazil
| | - Rosa Sá
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
- National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil
| | - Juliana Solheid
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Heino Besser
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Aron Andrade
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
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Liu S, Zhi J, Chen Y, Song Z, Wang L, Tang C, Li S, Lai X, Xu N, Liu T. Biomimetic modification on the microporous surface of cardiovascular materials to accelerate endothelialization and regulate intimal regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2022; 135:112666. [DOI: 10.1016/j.msec.2022.112666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 01/05/2022] [Accepted: 01/14/2022] [Indexed: 10/19/2022]
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Choe JC, Park JH, Lee HC, Park TS, Ahn J, Park JS, Lee HW, Oh JH, Choi JH, Cha KS, Yim C, Jeon S. Histopathologic response after hydrophilic polyethylene glycol-coating stent and hydrophobic octadecylthiol-coating stent implantations in porcine coronary restenosis model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:122. [PMID: 33247775 DOI: 10.1007/s10856-020-06452-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/07/2019] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
Device-related problems of drug-eluting stents, including stent thrombosis related to antiproliferative drugs and polymers, can cause adverse events such as inflammation and neointimal hyperplasia. Stent surface modification, wherein the drug and polymer are not required, may overcome these problems. We developed hydrophilic polyethylene glycol (PEG)-coating and hydrophobic octadecylthiol (ODT)-coating stents without a drug and polymer and evaluated their histopathologic response in a porcine coronary restenosis model. PEG-coating stents (n = 12), bare-metal stents (BMS) (n = 12), and ODT-coating stents (n = 10) were implanted with oversizing in 34 porcine coronary arteries. Four weeks later, the histopathologic response, arterial injury, inflammation, and fibrin scores were analyzed. A p value < 0.05 was considered statistically significant. There were significant differences in the internal elastic lamina area, lumen area, neointimal area, percent area of stenosis, arterial injury score, inflammation score, and fibrin score among the groups. Compared to the BMS or ODT-coating stent group, the PEG-coating stent group had significantly increased internal elastic lamina and lumen area (all p < 0.001) and decreased neointimal area and percent area of stenosis (BMS: p = 0.03 and p < 0.001, respectively; ODT-coating: p = 0.013 and p < 0.001, respectively). Similarly, the PEG-coating group showed significantly lower inflammation and fibrin scores than the BMS or ODT-coating groups (BMS: p = 0.013 and p = 0.007, respectively; ODT-coating: p = 0.014 and p = 0.008, respectively). In conclusion, hydrophilic PEG-coating stent implantation was associated with lower inflammatory response, decreased fibrin deposition, and reduced neointimal hyperplasia than BMS or hydrophobic ODT-coating stent implantation in the porcine coronary restenosis model.
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Affiliation(s)
- Jeong Cheon Choe
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jong Ha Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Han Cheol Lee
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea.
| | - Tae Sik Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jinhee Ahn
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jin Sup Park
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Hye Won Lee
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jun-Hyok Oh
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Jung Hyun Choi
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Kwang Soo Cha
- Division of Cardiology, Medical Research Institute, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Changyong Yim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Sangmin Jeon
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
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Wei Z, Wang W, Zhou C, Jin C, Leng X, Li Y, Zhang X, Chen S, Zhang B, Yang K. In vitro degradation and biocompatibility evaluation of fully biobased thermoplastic elastomers consisting of poly(β-myrcene) and poly( -lactide) as stent coating. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109254] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Sevostyanov MA, Kaplan MA, Nasakina EO, Shatova LA, Tsareva AM, Kolmakova AA, Karaduleva EV, Kulikov AV, Sarimov RM, Shkirin AV, Gudkov SV, Glinushkin AP, Kolmakov AG, Baikin AS. Development of a Biodegradable Polymer Based on High-Molecular-Weight Polylactide for Medicine and Agriculture: Mechanical Properties and Biocompatibility. DOKLADY CHEMISTRY 2020. [DOI: 10.1134/s0012500820020044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Guo Z, Zhao K, Liu R, Guo X, He B, Yan J, Ren J. pH-sensitive polymeric micelles assembled by stereocomplexation between PLLA-b-PLys and PDLA-b-mPEG for drug delivery. J Mater Chem B 2019; 7:334-345. [DOI: 10.1039/c8tb02313a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
pH-responsive stereocomplexed micelles based on poly(l-lactic acid)-b-polylysine/poly(d-lactic acid)-b-methoxy poly(ethylene glycol) (PLLA-b-PLys/PDLA-b-mPEG) were fabricated by stereocomplexation between enantiomeric PLA segments.
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Affiliation(s)
- Zhaoyuan Guo
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- China
| | - Ke Zhao
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- China
| | - Rong Liu
- Medical College
- Chengdu University
- Chengdu 610106
- China
| | - Xiaolan Guo
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- China
| | - Bin He
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - JianQin Yan
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Jing Ren
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- China
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Sybachin AV, Khlynina PO, Spiridonov VV, Panova IG, Melik-Nubarov NS, Yaroslavov AA. Amino-terminated polylactide micelles with an external poly(ethylene oxide) corona as carriers of drug-loaded anionic liposomes. POLYM INT 2018. [DOI: 10.1002/pi.5629] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Andrey V Sybachin
- Chemistry Department of Lomonosov; Moscow State University; Moscow Russia
| | - Polina O Khlynina
- Chemistry Department of Lomonosov; Moscow State University; Moscow Russia
| | | | - Irina G Panova
- Chemistry Department of Lomonosov; Moscow State University; Moscow Russia
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