Laser Cell Printing for Intestinal Tissue Layer Removal and Cell Transfer
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Solution Overview
Problem
The use of intestinal tissue as a substrate for non-intestinal tissue-engineered transplants, such as urinary bladder, is problematic due to its absorptive and secretive nature, necessitating a method that avoids these shortcomings.
Innovation Solution
A system and method utilizing laser ablation and laser-induced forward transfer (LIFT) to modify biological substrates by removing unwanted layers and depositing donor materials like urothelial cells onto a receiver substrate, such as intestinal tissue, to create a suitable transplant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intestinal tissue is used as a substrate for non-intestinal tissue-engineered transplants, then the substrate is autologous and tolerated by the immune system, but the absorptive and secretive nature of intestinal tissue creates functional problems
Solution Approach 1:
The patent removes the problematic epithelial layer (including absorptive and secretive cells) from the intestinal tissue substrate through laser ablation, while preserving the underlying immune-tolerant structural layers. This extraction eliminates the harmful functional properties while maintaining the beneficial immune compatibility of the autologous substrate.
Solution Approach 2:
The invention applies selective laser ablation to modify only specific regions of the intestinal tissue - specifically removing the epithelial layer while leaving the submucosal and muscular layers intact. This creates local quality changes where the substrate has different properties in different regions: immune-tolerant structural support from the preserved layers and non-absorptive surface from the removed epithelium.
2Reliability
If conventional tissue engineering methods are used to build cells on substrate, then considerable skill is required to ensure competent building, but this increases process complexity
Solution Approach 1:
The patent replaces manual mechanical tissue building operations with laser-based energy fields. Instead of requiring skilled operators to manually construct tissue layers, the laser system automatically deposits and organizes donor cells onto the prepared substrate through controlled energy delivery, reducing operational complexity while maintaining or improving tissue building quality.
Solution Approach 2:
The invention uses laser parameters (wavelength, pulse duration, energy density, scanning speed) to control the tissue engineering process. By adjusting these parameters, the system can precisely control cell deposition, adhesion, and organization without requiring manual skill intervention, thereby reducing process complexity while ensuring competent tissue construction.
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
Enables the creation of engineered tissues that can be transplanted without immune rejection, by precisely removing unwanted layers and adding necessary cells using lasers, enhancing the suitability of intestinal tissue for bladder augmentation.
Implementation Method 1
at least one of ablating or removing a portion of the receiver substrate via a first laser to expose a target layer of the receiver substrate
Implementation Method 2
irradiating the coating through the back surface of the donor substrate with one or more laser pulses produced by a second laser to transfer a portion of the donor material to the target layer
Data Source
AI summary
A method for cell printing is disclosed. The method includes generating a receiver substrate, ablating or removing a portion of the receiver substrate via a first laser to expose a target layer, generating a donor substrate containing a back surface and a front surface, applying a coating of donor material to the front surface. The method further includes aligning the front surface of the donor substrate to be parallel to and facing the receiver substrate, wherein the donor material is disposed adjacent to the target layer, and irradiating the coating through the back surface of the donor substrate with one or more laser pulses produced by a second laser to transfer a portion of the donor material to the target layer. A system for cell printing is also disclosed.