Adipose Stem Cell Amplification via Mechanical Separation
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Solution Overview
Problem
Current methods for amplifying adipose tissue stem cells are costly, time-consuming, and lead to contamination risks, with enzymatic separation methods destroying the three-dimensional structure of tissue and resulting in low yields of therapeutic-grade adipocytes, while non-enzymatic methods fail to adequately replicate the native tissue structure.
Innovation Solution
A method involving the extraction of a stromal vascular fraction and extracellular matrix from adipose tissue using mechanical separation, followed by suspension culture in a specific medium, which retains the three-dimensional structure and enhances cell amplification, using type I and type III collagen and fibronectin, allowing for the production of large quantities of therapeutic-grade adipocytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If enzymatic separation is used to isolate adipocyte precursors, then the separation efficiency is improved, but the three-dimensional structure of tissue is destroyed and contamination risks increase
Solution Approach 1:
The patent replaces enzymatic separation methods with mechanical separation methods. The mechanical separation process uses physical forces such as centrifugation and filtration to isolate adipocyte precursors without requiring enzymes, thereby avoiding the destruction of three-dimensional tissue structure and reducing contamination risks associated with enzymatic treatments.
Solution Approach 2:
The patent changes the separation parameters from enzymatic to mechanical approaches. By adjusting mechanical parameters such as centrifugal force, filtration pore size, and flow rates, the method achieves effective separation while preserving tissue architecture and minimizing contamination risks.
2Reliability
If non-enzymatic separation is used to isolate adipocyte precursors, then contamination risks are reduced, but the number of adipocyte precursors obtained is low
Solution Approach 1:
The patent merges mechanical separation with specific culture conditions and growth factors. By combining mechanical isolation with optimized culture parameters, the method achieves both low contamination risks and high yields of adipocyte precursors, overcoming the limitation of mechanical separation alone.
Solution Approach 2:
The patent introduces growth factors and cytokines as intermediaries to enhance the proliferation and survival of adipocyte precursors obtained through mechanical separation. These biological mediators compensate for the lower initial yield by promoting rapid cell expansion while maintaining the contamination-free environment established by mechanical separation.
3Device complexity
If standard 2D expansion is used to amplify adipocyte precursors, then the amplification process is simplified, but the structural integrity of tissue is lost
Solution Approach 1:
The patent transitions from two-dimensional monolayer culture to three-dimensional spheroid or aggregate culture. This dimensional change allows adipocyte precursors to maintain their natural three-dimensional tissue architecture while undergoing amplification, preserving structural integrity without requiring complex multi-step protocols.
Solution Approach 2:
The patent creates homogeneous three-dimensional aggregates that uniformly distribute cells and extracellular matrix components. This homogeneity maintains consistent tissue-like structure throughout the culture, preserving structural integrity while simplifying the amplification process through uniform growth conditions.
4Shape
If decellularized adipose tissue is used as matrix, then the structure of adipose tissue is improved, but therapeutic factors anchored on native matrix are lost
Solution Approach 1:
The patent selectively extracts only the extracellular matrix components while retaining living cells and their associated therapeutic factors. This selective extraction approach preserves the structural benefits of decellularized tissue while maintaining the functional integrity of embedded therapeutic molecules and cells.
Solution Approach 2:
The patent creates a composite structure combining decellularized matrix with live cells and their secreted factors. This composite approach integrates the structural advantages of processed matrix with the functional advantages of living biological material, preserving therapeutic factors while maintaining tissue architecture.
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 achieves an amplification factor greater than 30, reduces contamination risks, and maintains the structural integrity of adipose tissue, enabling effective cell therapy applications such as lipofilling and screening for metabolic diseases.
Implementation Method 1
extracting a stromal vascular fraction of a human adipose tissue comprising endothelial cells of the human adipose tissue vascular network and human adipose tissue stem cells, and an extracellular matrix of said human adipose tissue
Implementation Method 2
culturing the mixture obtained in the preceding step, in suspension, in a culture medium
Data Source
AI summary
The method for tin vitro or ex vivo amplification of human adipose tissue stem cells includes: —extracting a stromal vascular fraction of a human adipose tissue including endothelial cells of the human adipose tissue vascular network and human adipose tissue stem cells, and an extracellular matrix of the human adipose tissue, the extracellular matrix including endothelial cells of the human adipose tissue vascular network, human adipose tissue stem cells and collagen; —mixing the stromal vascular fraction and the extracellular matrix; and—culturing the mixture obtained in the preceding step, in suspension, in a culture medium.