Brown Fat Stem Cell Isolation and Culture
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Solution Overview
Problem
Current methods lack the ability to effectively isolate and utilize stem cells from brown adipose tissue for therapeutic or cosmetic purposes, particularly in treating metabolic disorders such as obesity, diabetes, and hypertension, as no stem cell population has been identified in brown adipose tissue until now.
Innovation Solution
Development of methods to isolate and culture stem cells from brown fat tissue, including obtaining brown fat tissue, isolating stem cells, and culturing them in a medium without animal products, and using these stem cells to treat metabolic disorders by administering them into fat deposits or screening for compounds regulating metabolism and thermogenesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stem cells are isolated from brown fat tissue, then therapeutic potential for metabolic disorders is achieved, but the absence of identified stem cell population in brown adipose tissue makes isolation impossible with current methods
Solution Approach 1:
The patent uses flow cytometry with specific antibody markers (CD133, CD34, CD45, CD90) as intermediaries to identify and isolate stem cells from brown fat tissue. These markers serve as mediators that enable the detection and separation of stem cells that were previously undetectable in brown adipose tissue.
Solution Approach 2:
The patent changes the parameters of cell identification by using specific surface marker expression profiles (CD133+, CD34-, CD45-, CD90+) to define brown fat stem cells. This parameter-based definition allows for the isolation of stem cells based on their immunophenotypic characteristics rather than relying on previously unknown population identifiers.
2Duration of action of stationary object
If conventional cell culture media are used, then cell growth is maintained, but animal products in the medium compromise therapeutic safety and efficacy
Solution Approach 1:
The patent extracts and removes animal-derived components (fetal bovine serum, horse serum) from the cell culture medium, replacing them with human platelet lysate and other xenogeneic-free supplements. This extraction of harmful animal products maintains cell growth capabilities while eliminating immunogenic and pathogenic risks.
Solution Approach 2:
The patent changes the compositional parameters of the culture medium by substituting animal-derived growth factors with recombinant or plant-based alternatives, specifically using human platelet lysate as a serum-free supplement that provides necessary growth factors without animal product contamination.
3Reliability
If brown fat is removed and readministered to treat obesity, then metabolic regulation is improved, but the scarcity of brown fat in adults limits treatment availability
Solution Approach 1:
The patent performs preliminary isolation and expansion of stem cells from brown fat tissue before administration. By pre-isolating and culturing stem cells (which can be expanded ex vivo), the treatment overcomes the scarcity of native brown fat in adults, allowing sufficient cell numbers to be obtained for therapeutic injection into white adipose tissue.
Solution Approach 2:
Instead of directly using and reinjecting scarce brown fat tissue, the patent inverts the approach by isolating stem cells from brown fat, expanding them in culture, and then injecting these expanded stem cells into white fat deposits. This inversion allows the limited brown fat source to generate sufficient therapeutic cells through in vitro expansion.
Data Source
AI summary
Methods of developing and using cell lines, such as stem cell lines, for therapeutic or cosmetic use. In one embodiment, the cell lines are used to treat a wide range of degenerative and metabolic disorders including, but not limited to, obesity, diabetes, hypertension, and cardiac deficiency. Also described are methods of using such cell lines to screen for compounds that play a role in regulating a variety of processes.