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Bandzerewicz A, Niebuda K, Gadomska-Gajadhur A. Synthesis and Cytotoxicity Studies of Poly(1,4-butanediol citrate) Gels for Cell Culturing. Gels 2023; 9:628. [PMID: 37623083 PMCID: PMC10453459 DOI: 10.3390/gels9080628] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 08/26/2023] Open
Abstract
One of the main branches of regenerative medicine is biomaterials research, which is designed to develop and study materials for regenerative therapies, controlled drug delivery systems, wound dressings, etc. Research is continually being conducted to find biomaterials-especially polymers-with better biocompatibility, broader modification possibilities and better application properties. This study describes a potential biomaterial, poly(1,4-butanediol citrate). The gelation time of poly(1,4-butanediol citrate) was estimated. Based on this, the limiting reaction time and temperature were determined to avoid gelling of the reaction mixture. Experiments with different process conditions were carried out, and the products were characterised through NMR spectra analysis. Using statistical methods, the functions were defined, describing the dependence of the degree of esterification of the acid groups on the following process parameters: temperature and COOH/OH group ratio. Polymer films from the synthesised polyester were prepared and characterised. The main focus was assessing the initial biocompatibility of the materials.
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Tan W, Boodagh P, Selvakumar PP, Keyser S. Strategies to counteract adverse remodeling of vascular graft: A 3D view of current graft innovations. Front Bioeng Biotechnol 2023; 10:1097334. [PMID: 36704297 PMCID: PMC9871289 DOI: 10.3389/fbioe.2022.1097334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 12/23/2022] [Indexed: 01/11/2023] Open
Abstract
Vascular grafts are widely used for vascular surgeries, to bypass a diseased artery or function as a vascular access for hemodialysis. Bioengineered or tissue-engineered vascular grafts have long been envisioned to take the place of bioinert synthetic grafts and even vein grafts under certain clinical circumstances. However, host responses to a graft device induce adverse remodeling, to varied degrees depending on the graft property and host's developmental and health conditions. This in turn leads to invention or failure. Herein, we have mapped out the relationship between the design constraints and outcomes for vascular grafts, by analyzing impairment factors involved in the adverse graft remodeling. Strategies to tackle these impairment factors and counteract adverse healing are then summarized by outlining the research landscape of graft innovations in three dimensions-cell technology, scaffold technology and graft translation. Such a comprehensive view of cell and scaffold technological innovations in the translational context may benefit the future advancements in vascular grafts. From this perspective, we conclude the review with recommendations for future design endeavors.
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Affiliation(s)
- Wei Tan
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, United States,*Correspondence: Wei Tan,
| | - Parnaz Boodagh
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | | | - Sean Keyser
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, United States
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Xie X, Wu Q, Liu Y, Chen C, Chen Z, Xie C, Song M, Jiang Z, Qi X, Liu S, Tang Z, Wu Z. Vascular endothelial growth factor attenuates neointimal hyperplasia of decellularized small-diameter vascular grafts by modulating the local inflammatory response. Front Bioeng Biotechnol 2022; 10:1066266. [PMID: 36605251 PMCID: PMC9808043 DOI: 10.3389/fbioe.2022.1066266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
Small-diameter vascular grafts (diameter <6 mm) are in high demand in clinical practice. Neointimal hyperplasia, a common complication after implantation of small-diameter vascular grafts, is one of the common causes of graft failure. Modulation of local inflammatory responses is a promising strategy to attenuates neointimal hyperplasia. Vascular endothelial growth factor (VEGF) is an angiogenesis stimulator that also induces macrophage polarization and modulates inflammatory responses. In the present study, we evaluated the effect of VEGF on the neointima hyperplasia and local inflammatory responses of decellularized vascular grafts. In the presence of rhVEGF-165 in RAW264.6 macrophage culture, rhVEGF-165 induces RAW264.6 macrophage polarization to M2 phenotype. Decellularized bovine internal mammary arteries were implanted into the subcutaneous and infrarenal abdominal aorta of New Zealand rabbits, with rhVEGF-165 applied locally to the adventitial of the grafts. The vascular grafts were removed en-bloc and submitted to histological and immunofluorescence analyses on days 7 and 28 following implantation. The thickness of the fibrous capsule and neointima was thinner in the VEGF group than that in the control group. In the immunofluorescence analysis, the number of M2 macrophages and the ratio of M2/M1 macrophages in vascular grafts in the VEGF group were higher than those in the control group, and the proinflammatory factor IL-1 was expressed less than in the control group, but the anti-inflammatory factor IL-10 was expressed more. In conclusion, local VEGF administration attenuates neointimal hyperplasia in decellularized small-diameter vascular grafts by inducing macrophage M2 polarization and modulating the inflammatory response.
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Affiliation(s)
- Xinlong Xie
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Department of Cardiothoracic Surgery, The First Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Qiying Wu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuhong Liu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chunyang Chen
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zeguo Chen
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chao Xie
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mingzhe Song
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhenlin Jiang
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaoke Qi
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Sixi Liu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhenjie Tang
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering Laboratory of Hunan Province for Cardiovascular Biomaterials, Changsha, Hunan, China
| | - Zhongshi Wu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Engineering Laboratory of Hunan Province for Cardiovascular Biomaterials, Changsha, Hunan, China,*Correspondence: Zhongshi Wu,
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Dashtimoghadam E, Maw M, Keith AN, Vashahi F, Kempkes V, Gordievskaya YD, Kramarenko EY, Bersenev EA, Nikitina EA, Ivanov DA, Tian Y, Dobrynin AV, Vatankhah-Varnosfaderani M, Sheiko SS. Super-soft, firm, and strong elastomers toward replication of tissue viscoelastic response. MATERIALS HORIZONS 2022; 9:3022-3030. [PMID: 36128881 DOI: 10.1039/d2mh00844k] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Polymeric networks are commonly used for various biomedical applications, from reconstructive surgery to wearable electronics. Some materials may be soft, firm, strong, or damping however, implementing all four properties into a single material to replicate the mechanical properties of tissue has been inaccessible. Herein, we present the A-g-B brush-like graft copolymer platform as a framework for fabrication of materials with independently tunable softness and firmness, capable of reaching a strength of ∼10 MPa on par with stress-supporting tissues such as blood vessel, muscle, and skin. These properties are maintained by architectural control, therefore diverse mechanical phenotypes are attainable for a variety of different chemistries. Utilizing this attribute, we demonstrate the capability of the A-g-B platform to enhance specific characteristics such as tackiness, damping, and moldability.
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Affiliation(s)
- Erfan Dashtimoghadam
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Mitchell Maw
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Andrew N Keith
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Foad Vashahi
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Verena Kempkes
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Yulia D Gordievskaya
- Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russian Federation
| | - Elena Yu Kramarenko
- Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russian Federation
| | - Egor A Bersenev
- Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russian Federation
| | - Evgeniia A Nikitina
- Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russian Federation
| | - Dimitri A Ivanov
- Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russian Federation
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, 15, rue Jean Starcky, F-68057 Mulhouse, France.
- Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russian Federation
| | - Yuan Tian
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | - Andrey V Dobrynin
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
| | | | - Sergei S Sheiko
- Department of Chemistry, University of North Carolina at Chapel Hill, 27599, USA.
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