Engineered Full Thickness Electrospun Scaffold for Esophageal Tissue Regeneration: From In Vitro to In Vivo Approach

• Main Authors: Silvia Pisani (Author), Stefania Croce (Author), Simone Mauramati (Author), Marta Marmonti (Author), Lorenzo Cobianchi (Author), Irene Herman (Author), Rossella Dorati (Author), Maria Antonietta Avanzini (Author), Ida Genta (Author), Marco Benazzo (Author), Bice Conti (Author)
• Format: Book
• Published: MDPI AG, 2022-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.3390/pharmaceutics14020252; 1999-4923
• Keywords: tissue engineering; electrospun nanofibers; esophagus regeneration; tubular scaffold; mesenchymal stem cell; in vivo implantation; Pharmacy and materia medica; RS1-441
• Source: Pharmaceutics, Vol 14, Iss 2, p 252 (2022)

Acquired congenital esophageal malformations, such as malignant esophageal cancer, require esophagectomy resulting in full thickness resection, which cannot be left untreated. The proposed approach is a polymeric full-thickness scaffold engineered with mesenchymal stem cells (MSCs) to promote and speed up the regeneration process, ensuring adequate support and esophageal tissue reconstruction and avoiding the use of autologous conduits. Copolymers poly-L-lactide-co-poly-ε-caprolactone (PLA-PCL) 70:30 and 85:15 ratio were chosen to prepare electrospun tubular scaffolds. Electrospinning apparatus equipped with two different types of tubular mandrels: cylindrical (∅ 10 mm) and asymmetrical (∅ 10 mm and ∅ 8 mm) were used. Tubular scaffolds underwent morphological, mechanical (uniaxial tensile stress) and biological (MTT and Dapi staining) characterization. Asymmetric tubular geometry resulted in the best properties and was selected for in vivo surgical implantation. Anesthetized pigs underwent full thickness circumferential resection of the mid-lower thoracic esophagus, followed by implantation of the asymmetric scaffold. Preliminary in vivo results demonstrated that detached stitch suture achieved better results in terms of animal welfare and scaffold integration; thus, it is to be preferred to continuous suture.