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The Effect of Multilayered Electrospun Plla Nanofibers Coated With Human Amnion or Bladder Ecm Proteins on Epithelialization and Smooth Muscle Regeneration in the Rabbit Bladder Publisher Pubmed



Gholami K1 ; Seyedjafari E2 ; Mahdavi FS2 ; Naghdipoor M1 ; Mesbah G1, 3 ; Zahmatkesh P1 ; Akbarzadehmoallemkolaei M4 ; Baghdadabad LZ1 ; Pandian SK5 ; Meilika KN6 ; Aghamir SMK1
Authors
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Authors Affiliations
  1. 1. Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Biotechnology, College of Science, University of Tehran, Tehran, 1416753955, Iran
  3. 3. AshianGanoTeb Biopharmaceutical Company, Golestan University of Medical Sciences, Gorgan, Iran
  4. 4. Animal Model Integrated Network (AMIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran
  5. 5. Chelsea and Westminster Hospital NHS Foundation Trust, London, United Kingdom
  6. 6. Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, 1416753955, NY, United States

Source: Macromolecular Bioscience Published:2024


Abstract

Nanofibrous scaffolds have attracted much attention in bladder reconstruction approaches due to their excellent mechanical properties. In addition, their biological properties can be improved by combination with biological materials. Taking into account the advantages of nanofibrous scaffolds and decellularized extracellular matrix (dECM) in tissue engineering, scaffolds of poly‑L‑lactic acid (PLLA) coated with decellularized human amnion membrane (hAM) or sheep bladder (SB)-derived ECM proteins are developed (amECM-coated PLLA and sbECM-coated PLLA, respectively). The bladder regenerative potential of modified electrospun PLLA scaffolds is investigated in rabbits. The presence of ECM proteins is confirmed on the nanofibers’ surface. Coating the surface of the PLLA nanofibers improves cell adhesion and proliferation. Histological and immunohistochemical evaluations show that rabbits subjected to cystoplasty with a multilayered PLLA scaffold show de novo formation and maturation of the multilayered urothelial layer. However, smooth muscle bundles (myosin heavy chain [MHC] and α-smooth muscle actin [α-SMA] positive) are detected only in ECM-coated PLLA groups. All groups show no evidence of a diverticulumor fistula in the urinary bladder. These results suggest that the biofunctionalization of electrospun PLLA nanofibers with ECM proteins can be a promising option for bladder tissue engineering. Furthermore, hAM can also replace animal-sourced ECM proteins in bladder tissue regeneration approaches. © 2023 Wiley-VCH GmbH.