Cited by 24Electrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative MedicineBone Tissue Engineering Materials

Electrospun Nanofibers with Core–Shell Structure for Treatment of Bladder Regeneration

Feng, Chunxiang, Liu, Chang, Liu, Shiliang, Wang, Zhixian, Yu, Kai, Zeng, Xiaoyong·2019·Tissue Engineering Part A

Abstract

Hyaluronic acid (HA) is an important component of the extracellular matrix (ECM), and electrospun scaffolds have the three-dimensional porous network structure characteristics similar to those of the autologous ECM. However, scaffold fabrication of water-dissolved HA without surfactant by electrospinning is difficult. This study reports the fabrication of HA-coated biomimetic nanofiber scaffolds through coaxial electrospinning of poly( l -lactide)/poly(e-caprolactone) (PLCL) and HA to modulate proliferation and migration of smooth muscle cells (SMCs) for bladder regeneration. The nanofibers were verified by scanning and transmission electron microscopy, attenuated total reflection Fourier transform infrared spectroscopy. Contact angle and swelling were measured to determine hydrophilicity of the nanofiber scaffolds. SMCs were seeded onto the PLCL/HA and PLCL scaffolds for the in vitro study. For the in vivo study, 36 rats were divided into the PLCL/HA, PLCL, cystotomy controls, and sham surgery groups, 8 rats per group. The 40–50% supratrigonal cystectomy was performed and replaced with or without domed scaffolds. The rats were followed for 4 and 10 weeks. After the follow-up, urodynamic test was performed to check the functions of bladder. The defect area was excised for histological examination. Highly uniform PLCL/HA nanofibers had the core–shell structures. The HA coating on the PLCL nanofibers endowed the nanofibrous mats with increased anisotropic wettability and swelling. The PLCL/HA nanofibers significantly promoted SMC proliferation and migration. In vivo implantation in a rat bladder augmentation model demonstrated that the bladder walls made of PLCL/HA nanofiber scaffolds integrated with host tissue and stimulated the formation of bladder smooth muscle layers that expressed contractile protein alpha-smooth muscle actin. In addition, bladder capacity was significantly improved. These findings show that the bilayer PLCL/HA nanofiber domed mesh is a promising scaffold with good cytocompatibility and can promote smooth muscle tissue proliferation for bladder regeneration. Impact Statement: The extracellular matrix (ECM)-inspired electrospinning scaffolds have a good cytocompatibility. Hyaluronic acid (HA) is one of the main components in the bladder ECM, but it is hard to be made by electrospinning alone. In this study, it is shown that coaxial electrospinning can fabricate poly( l -lactide)/poly(e-caprolactone) (PLCL)/HA nanofibers with the core–shell structure. The HA coating nanofibers have more hydrophilicity, which can promote cell proliferation and migration by filopodial outgrowth. We also fabricated domed PLCL/HA nanofiber scaffolds used in bladder regeneration by improving bladder capacity and facilitating smooth muscle proliferation.

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Crossref · 10.1089/ten.tea.2018.0255

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  • Coaxial electrospinning biomimetic nanofiber scaffold based on hyaluronic acid and PLCL promotes bladder regeneration by regulating proliferation and migration of smooth muscle cells; HA increases anisotropy and hydrophilicity of scaffold, promotes migration and proliferation of SMC; bladder capacity of rats implanted with composite stents significantly improved.

    “Feng et al. constructed a coaxial electrospinning biomimetic nanofiber scaffold based on hyaluronic acid and PLCL, which promoted bladder regeneration by regulating the proliferation and migration of smooth muscle cells. The results showed that HA increased the anisotropy and hydrophilicity of the scaffold, and promoted the migration and proliferation of SMC. The results of animal experiments”

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Authors
Feng, C., Liu, C., Liu, S., Wang, Z., Yu, K., & Zeng, X.
Affiliations
Tongji Hospital (CN)
Corresponding author
Zeng, Xiaoyong
Venue
Tissue Engineering Part A
Published
2019-09
Volume
25
Issue
17-18
Pages
1289-1299
ISSN
  • 1937-3341 (ISSN-L)
  • 1937-335X
OpenAlex
W2983077691
Cited by
24
References
43
Citations by year
2026: 3 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 6 · 2020: 7 · 2019: 1
FWCI
1.13
Type
journal article
Language
en
Open access
closed
Locations
  • Tissue Engineering Part A (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation
Topics
  • Physical Sciences › Materials Science › Biomaterials › Electrospun Nanofibers in Biomedical Applications
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Physical Sciences › Engineering › Biomedical Engineering › Bone Tissue Engineering Materials
Keywords
bladder regeneration, hyaluronic acid, core-shell nanofibers, coaxial electrospinning, poly(L-lactic acid), polycaprolactone, smooth muscle cells, cell proliferation and migration, bladder augmentation, alpha-smooth muscle actin, extracellular matrix, biomimetic scaffolds, rat model, urodynamic function
MeSH terms
Animals, Urinary Bladder, Immunohistochemistry, Wettability, Rats, Sprague-Dawley, Microscopy, Confocal, Tissue Engineering, Microscopy, Electron, Transmission, Cell Proliferation, Rats, Tissue Scaffolds, Nanofibers

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