Tissue-Engineered Intestine Scaffold for Recreating Peristalsis
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Solution Overview
Problem
Current treatments for short bowel syndrome, such as intestinal transplantation and surgical strategies, face challenges including donor availability, complications from immunosuppressive therapy, and the inability to recreate peristaltic motion due to the absence of functional smooth muscle layers and neural plexuses in tissue-engineered intestines.
Innovation Solution
An engineered intestine construct comprising a nanofiber scaffold seeded with neural stem cells, smooth muscle cells, and intestinal stem cells, utilizing HB-EGF polypeptides to enhance cell proliferation and migration, and a multilayer scaffold design to mimic native intestine architecture, including a custom cell filtration system to enrich intestinal stem cells and incorporate growth factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intestinal transplantation is used to treat short bowel syndrome, then functional rescue is achieved, but donor availability is limited and complications from immunosuppressive therapy occur
Solution Approach 1:
The patent creates a tissue-engineered intestine that copies the functional characteristics of native intestine without requiring a biological donor. The engineered construct includes nanofiber scaffolds seeded with intestinal stem cells, smooth muscle cells, and neural stem cells to replicate absorptive, motility, and peristaltic functions, thereby eliminating donor availability constraints and immunosuppression requirements
Solution Approach 2:
The tissue-engineered intestine utilizes the patient's own intestinal stem cells and growth factors to regenerate functional tissue. The nanofiber scaffold is designed to be biodegradable and supportive of endogenous cell proliferation, allowing the patient's body to contribute to the regeneration process rather than relying entirely on external donor tissue
2Ease of manufacture
If tissue-engineered intestine is constructed without functional layers, then manufacturing is simplified, but peristaltic motion cannot be recreated
Solution Approach 1:
The patent divides the intestine into distinct functional layers (mucosa with absorptive cells, submucosa, muscularis with smooth muscle cells, and neural plexus) and reconstructs each layer separately on the nanofiber scaffold. This segmentation allows complex functions like peristalsis to be achieved through organized cellular arrangements rather than requiring a completely different structural approach
Solution Approach 2:
The tissue-engineered intestine uses composite structures combining nanofiber scaffolds with multiple cell types (intestinal stem cells, smooth muscle cells, neural stem cells) and growth factors. This composite approach enables the integration of multiple functions (absorption, motility, neural control) within a single constructed tissue that maintains structural organization
3Productivity
If nanofiber scaffold with HB-EGF is used, then cell proliferation and migration are enhanced, but manufacturing complexity increases
Solution Approach 1:
The nanofiber scaffold is pre-seeded with intestinal stem cells, smooth muscle cells, and neural stem cells before implantation. Growth factors including HB-EGF are incorporated into the scaffold structure in advance, creating a pre-conditioned environment that promotes rapid cell proliferation and migration after implantation, thereby reducing the need for complex post-implantation interventions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The engineered intestine construct promotes full-thickness regeneration with peristaltic and absorptive functions, overcoming the limitations of existing treatments by avoiding donor issues and immunosuppression complications, and recreating the necessary muscle and neural structures for intestinal motility.
Implementation Method 1
sHB-EGF is able to bind to cell-surface heparin-like molecules (heparan sulfate proteoglycans; HSPG), which act as low affinity, high capacity receivers for HB-EGF
Implementation Method 2
HB-EGF binds to the 'classic' or prototypic epidermal growth factor receiver (EGFR; ErbB-1). However, while the mitogenic function of sHB-EGF is mediated through activation of ErbB-1
Implementation Method 3
its migration-inducing function involves the activation of ErbB-4 and the more recently described N-arginine dibasic convertase (NRDc, Nardilysin)
Implementation Method 4
An engineered intestine construct comprising a nanofiber scaffold seeded with neural stem cells, smooth muscle cells, and intestinal stem cells
Implementation Method 5
The scaffold is an electrospun nanofiber scaffold
Data Source
AI summary
The invention provides for engineered intestinal construct and methods of making these constructs. The invention also provides for methods of treating short bowel syndrome or methods of repairing an intestine after resection comprising inserting an engineered intestinal construct into the intestine of a subject in need.