Multilayered Cardiac Stem Cell Sheet via Hydrogel Compaction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for preparing multilayered cell sheets of cardiac stem cells (CSCs) face challenges such as physical vulnerability, contamination risks, and lengthy multi-step processes, which affect the delivery, retention, and engraftment of cells in damaged myocardial tissue, limiting their therapeutic effectiveness for myocardial regeneration.
Innovation Solution
A single-step culture procedure using a biodegradable natural polymer hydrogel as a three-dimensional scaffold to embed CSCs, applying physical support during stressed culture conditions and removing it during non-stressed conditions to induce cell-mediated hydrogel compaction, enhancing cell-to-cell and cell-to-hydrogel adhesion and bioactive factor accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional multi-step methods are used to prepare multilayered cell sheets, then cell sheets can be formed, but the process is lengthy and complex with physical vulnerability and contamination risks
Solution Approach 1:
The patent combines multiple preparation steps into a single-step culture procedure. Cardiac stem cells are embedded in a hydrogel scaffold that provides structural support throughout the culture process, eliminating the need for separate steps to form and stabilize multilayered sheets. This integration reduces preparation time and minimizes handling that causes physical vulnerability and contamination.
Solution Approach 2:
The hydrogel scaffold acts as an intermediary that maintains the structural integrity of multilayered cell sheets during culture. It provides a three-dimensional framework that supports cell aggregation and layer formation without requiring manual manipulation, thereby reducing physical vulnerability and contamination risks while enabling efficient multilayered sheet preparation.
2Ease of operation
If cells are transplanted via intravenous or intramyocardial injection, then delivery to the heart is achieved, but delivery rate and retention rate are less than 1%
Solution Approach 1:
The patent transitions from two-dimensional cell culture to three-dimensional culture within a hydrogel scaffold. This three-dimensional structure better mimics the native myocardial environment, enhancing cell survival and function. The multilayered cell sheets can be transplanted as intact structures, improving delivery efficiency and retention compared to single-cell injections.
Solution Approach 2:
The patent performs preliminary actions by pre-forming multilayered cell sheets with optimized structure and bioactive factor accumulation before transplantation. The hydrogel scaffold is prepared in advance to provide structural support and promote cell aggregation into functional multilayered sheets, ensuring higher delivery efficiency and retention when transplanted into the damaged myocardium.
3Ease of manufacture
If single-step culture procedure is used with hydrogel scaffold, then preparation time is reduced and physical stability is improved, but complex culture conditions are required
Solution Approach 1:
The hydrogel scaffold is designed to provide self-service functions during culture. It automatically maintains the structural framework, supports cell aggregation, and creates the necessary three-dimensional environment without requiring complex external interventions. The scaffold's properties enable it to self-regulate the culture environment, simplifying the overall process despite the sophisticated biology involved.
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
This method stabilizes the multilayered cell sheet, increases its physical characteristics, and enhances biological functions by accumulating extracellular matrix and bioactive factors, improving delivery, retention, and engraftment rates of CSCs in the myocardium, thereby promoting myocardial regeneration and reducing fibrosis.
Implementation Method 1
embedding the cultured CSCs in a hydrogel
Implementation Method 2
culturing the hydrogel including the CSCs embedded therein under stressed culture conditions in which a physical support is applied to prevent cell-mediated hydrogel compactions
Implementation Method 3
enhances biological functions by accumulating extracellular matrix and bioactive factors
Data Source
AI summary
Disclosed are a multilayered cell sheet of cardiac stem cells (CSCs) and a method of manufacturing the same. In particular, the present disclosure provides a method of manufacturing a multilayered cell sheet according to a single step culture procedure by using, as a three-dimensional matrix, a biodegradable natural polymer hydrogel and embedding CSCs in the hydrogel. The multilayered cell sheet of the present disclosure does not require any special device for the manufacturing, is manageable with good physicomechanical property, increases a cell engraftment rate after transplantation based on sufficient accumulation of various growth and protective factors and extracellular matrix between cells, and is also self-assembled by the cell-mediated hydrogel compaction, making nutrients transfer easy. Therefore, the multilayered cell sheet of the CSCs is expected to be usefully applicable as a therapeutic agent for myocardium regeneration.