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Zumbardo-Bacelis GA, Peponi L, Vargas-Coronado RF, Rodríguez-Velázquez E, Alatorre-Meda M, Chevallier P, Copes F, Mantovani D, Abraham GA, Cauich-Rodríguez JV. A Comparison of Three-Layer and Single-Layer Small Vascular Grafts Manufactured via the Roto-Evaporation Method. Polymers (Basel) 2024; 16:1314. [PMID: 38794507 PMCID: PMC11125268 DOI: 10.3390/polym16101314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/18/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
This study used the roto-evaporation technique to engineer a 6 mm three-layer polyurethane vascular graft (TVG) that mimics the architecture of human coronary artery native vessels. Two segmented polyurethanes were synthesized using lysine (SPUUK) and ascorbic acid (SPUAA), and the resulting materials were used to create the intima and adventitia layers, respectively. In contrast, the media layer of the TVG was composed of a commercially available polyurethane, Pearlbond 703 EXP. For comparison purposes, single-layer vascular grafts (SVGs) from individual polyurethanes and a polyurethane blend (MVG) were made and tested similarly and evaluated according to the ISO 7198 standard. The TVG exhibited the highest circumferential tensile strength and longitudinal forces compared to single-layer vascular grafts of lower thicknesses made from the same polyurethanes. The TVG also showed higher suture and burst strength values than native vessels. The TVG withstood up to 2087 ± 139 mmHg and exhibited a compliance of 0.15 ± 0.1%/100 mmHg, while SPUUK SVGs showed a compliance of 5.21 ± 1.29%/100 mmHg, akin to coronary arteries but superior to the saphenous vein. An indirect cytocompatibility test using the MDA-MB-231 cell line showed 90 to 100% viability for all polyurethanes, surpassing the minimum 70% threshold needed for biomaterials deemed cytocompatibility. Despite the non-cytotoxic nature of the polyurethane extracts when grown directly on the surface, they displayed poor fibroblast adhesion, except for SPUUK. All vascular grafts showed hemolysis values under the permissible limit of 5% and longer coagulation times.
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Affiliation(s)
- Gualberto Antonio Zumbardo-Bacelis
- Unidad de Materiales, Centro de Investigación Científica de Yucatán, Calle 43 #130 x 32 y 34, Colonia Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (G.A.Z.-B.); (R.F.V.-C.)
- Department of Chemical Engineering, Laval University, Quebec, QC G1V 0A6, Canada
| | - Laura Peponi
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
| | - Rossana Faride Vargas-Coronado
- Unidad de Materiales, Centro de Investigación Científica de Yucatán, Calle 43 #130 x 32 y 34, Colonia Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (G.A.Z.-B.); (R.F.V.-C.)
| | - Eustolia Rodríguez-Velázquez
- Facultad de Odontología, Universidad Autónoma de Baja California, Tijuana 22390, Mexico;
- Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, Tecnológico Nacional de México, Instituto Tecnológico de Tijuana, Tijuana 22510, Mexico
| | - Manuel Alatorre-Meda
- Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, CONAHCYT-Tecnológico Nacional de México, Instituto Tecnológico de Tijuana, Tijuana 22510, Mexico;
| | - Pascale Chevallier
- Laboratory for Biomaterials and Bioengineering (CRC-I), Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec, QC G1V0A6, Canada; (P.C.)
| | - Francesco Copes
- Laboratory for Biomaterials and Bioengineering (CRC-I), Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec, QC G1V0A6, Canada; (P.C.)
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering (CRC-I), Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec, QC G1V0A6, Canada; (P.C.)
| | - Gustavo A. Abraham
- Research Institute for Materials Science and Technology, INTEMA (UNMdP-CONICET). Av. Colón 10850, Mar del Plata B7606BWV, Argentina
| | - Juan Valerio Cauich-Rodríguez
- Unidad de Materiales, Centro de Investigación Científica de Yucatán, Calle 43 #130 x 32 y 34, Colonia Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (G.A.Z.-B.); (R.F.V.-C.)
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Araiza-Verduzco F, Rodríguez-Velázquez E, Cruz H, Rivero IA, Acosta-Martínez DR, Pina-Luis G, Alatorre-Meda M. Photocrosslinked Alginate-Methacrylate Hydrogels with Modulable Mechanical Properties: Effect of the Molecular Conformation and Electron Density of the Methacrylate Reactive Group. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E534. [PMID: 31979162 PMCID: PMC7040623 DOI: 10.3390/ma13030534] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/02/2020] [Accepted: 01/06/2020] [Indexed: 01/09/2023]
Abstract
Hydrogels for load-bearing biomedical applications, such as soft tissue replacement, are required to be tough and biocompatible. In this sense, alginate-methacrylate hydrogels (H-ALGMx) are well known to present modulable levels of elasticity depending on the methacrylation degree; however, little is known about the role of additional structural parameters. In this work, we present an experimental-computational approach aimed to evaluate the effect of the molecular conformation and electron density of distinct methacrylate groups on the mechanical properties of photocrosslinked H-ALGMx hydrogels. Three alginate-methacrylate precursor macromers (ALGMx) were synthesized: alginate-glycidyl methacrylate (ALGM1), alginate-2-aminoethyl methacrylate (ALGM2), and alginate-methacrylic anhydride (ALGM3). The macromers were studied by Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H-NMR), and density functional theory method (DFT) calculations to assess their molecular/electronic configurations. In parallel, they were also employed to produce H-ALGMx hydrogels, which were characterized by compressive tests. The obtained results demonstrated that tougher hydrogels were produced from ALGMx macromers presenting the C=C reactive bond with an outward orientation relative to the polymer chain and showing free rotation, which favored in conjunction the covalent crosslinking. In addition, although playing a secondary role, it was also found that the presence of acid hydrogen atoms in the methacrylate unit enables the formation of supramolecular hydrogen bonds, thereby reinforcing the mechanical properties of the H-ALGMx hydrogels. By contrast, impaired mechanical properties resulted from macromer conditions in which the C=C bond adopted an inward orientation to the polymer chain accompanied by a torsional impediment.
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Affiliation(s)
- Fernanda Araiza-Verduzco
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (F.A.-V.); (D.R.A.-M.)
| | - Eustolia Rodríguez-Velázquez
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (F.A.-V.); (D.R.A.-M.)
- Facultad de Odontología, Universidad Autónoma de Baja California, Campus Tijuana, Calzada Universidad 14418, Tijuana 22390, BC, Mexico
| | - Harold Cruz
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (H.C.); (I.A.R.); (G.P.-L.)
| | - Ignacio A. Rivero
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (H.C.); (I.A.R.); (G.P.-L.)
| | - Delvis R. Acosta-Martínez
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (F.A.-V.); (D.R.A.-M.)
| | - Georgina Pina-Luis
- Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico; (H.C.); (I.A.R.); (G.P.-L.)
| | - Manuel Alatorre-Meda
- Cátedras CONACyT-Tecnológico Nacional de México/I. T. Tijuana. Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, Blvd. Alberto Limón Padilla S/N, Tijuana 22510, BC, Mexico
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