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A bioactive compliant vascular graft modulates macrophage polarization and maintains patency with robust vascular remodeling

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Bioactive Materials 2023年第1期19卷 167-178页

作者： Alexander Stahl Dake Hao Janos Barrera Dominic Henn Sien Lin Seyedsina Moeinzadeh Sungwoo Kim William Maloney Geoffrey Gurtner Aijun Wang Yunzhi Peter Yang Department of Orthopaedic Surgery Stanford University240 Pasteur DriveStanfordCA94304USA Department of Chemistry Stanford University121 Mudd BuildingStanfordCA94305USA Department of Surgery School of MedicineUniversity of California DavisSacramentoCA95817USA Institute for Pediatric Regenerative Medicine Shriners Hospitals for ChildrenSacramentoCA95817USA Department of Surgery Stanford University300 Pasteur DriveStanfordCA94305USA Department of Biomedical Engineering University of California DavisDavisCA95616USA Department of Materials Science and Engineering Stanford University496 Lomita MallStanfordCA94305USA Department of Bioengineering Stanford University443 Via OrtegaStanfordCA4305USA

Conventional synthetic vascular grafts are associated with significant failure rates due to their mismatched mechanical properties with the native vessel and poor regenerative *** different tissue engineering approaches have been used to improve the biocompatibility of synthetic vascular grafts,it is still crucial to develop a new generation of synthetic grafts that can match the dynamics of native vessel and direct the host response to achieve robust vascular *** size of pores within implanted biomaterials has shown significant effects on macrophage polarization,which has been further confirmed as necessary for efficient vascular formation and ***,we developed biodegradable,autoclavable synthetic vascular grafts from a new polyurethane elastomer and tailored the grafts’interconnected pore sizes to promote macrophage populations with a pro-regenerative phenotype and improve vascular regeneration and patency *** synthetic vascular grafts showed similar mechanical properties to native blood vessels,encouraged macrophage populations with varying M2 to M1 phenotypic expression,and maintained patency and vascular regeneration in a one-month rat carotid interposition model and in a four-month rat aortic interposition *** innovative bioactive synthetic vascular graft holds promise to treat clinical vascular diseases.

关键词： vascular graft vascular compliance Pore size Macrophage polarization vascular remodeling

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