Nelfa Marker Selection for Totipotent Stem Cell Reprogramming
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Solution Overview
Problem
There is a need to identify markers of totipotency to achieve and maintain maximum cellular plasticity for efficient reprogramming and therapeutic applications, as existing methods for inducing totipotent cells are inefficient and not well understood.
Innovation Solution
The method involves detecting the expression level of Nelfa in embryonic stem cells and correlating it with a reference sample to determine potency state, and using anti-Nelfa antigen binding proteins to select totipotent-like ESCs, as well as inducing totipotency through metabolic regulators, small molecules, chemicals, viruses, nucleic acids, or polypeptides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional reprogramming strategies are used to induce pluripotent stem cells, then cellular plasticity is achieved, but reprogramming efficiency is low
Solution Approach 1:
The patent changes the parameter of cellular potency from pluripotent to totipotent state by inducing expression of totipotent markers (such as Zscan4, Tostv3, Gm4340, Dux, and MERVL retrotransposons). This parameter change enables the stem cells to achieve maximum cellular plasticity and generate both embryonic and extraembryonic lineages, thereby resolving the contradiction between reprogramming efficiency and cellular plasticity maintenance.
Solution Approach 2:
The patent introduces totipotent markers as intermediary substances that mediate the reprogramming process. These markers serve as indicators and effectors that facilitate the transition from somatic cells to totipotent stem cells, improving reprogramming efficiency while maintaining cellular plasticity through their specific biological functions in regulating gene expression and chromatin structure.
2Adaptability or versatility
If totipotent cells are generated to achieve maximum cellular plasticity, then therapeutic potential is enhanced, but the complexity of maintaining totipotency increases
Solution Approach 1:
The patent replaces complex mechanical and epigenetic mechanisms with molecular markers and simplified induction methods. Instead of relying on complex chromatin remodelling and gene expression networks, the patent uses detectable molecular markers (such as protein or nucleic acid expressions) to identify and maintain totipotent cells, thereby reducing the complexity of maintaining totipotency while preserving maximum cellular plasticity.
Solution Approach 2:
The patent creates copies of totipotent cell states through induction of totipotent markers in differentiated cells. By copying the molecular characteristics of totipotent cells (such as expressing Zscan4, Dux, or MERVL), the patent can generate and maintain totipotent-like cells without requiring the complete replication of complex developmental processes, thus reducing maintenance complexity while preserving adaptability.
3Productivity
If markers of totipotency are identified to improve reprogramming, then reprogramming efficiency increases, but detection and measurement complexity increases
Solution Approach 1:
The patent employs markers that can be detected through color or signal changes, such as fluorescent proteins or enzymatic activities that produce visible signals. This allows for simple and efficient detection of totipotent markers in cells, improving reprogramming efficiency while avoiding complex detection procedures. The markers are designed to provide clear, measurable signals that can be detected with standard laboratory equipment.
Data Source
AI summary
The present invention relates to methods of determining a potency state of an embryonic stem cell (ESC) in culture, comprising detecting the expression level of Negative Elongation Factor Complex Member A (Nelfa) in the ESC, and correlating the expression level of Nelfa with that of a reference sample to determine the potency state of the ESC. The present invention also provides methods of selecting totipotent-like ESCs from a population of ESCs in culture using an anti-Nelfa antigen binding protein, methods of inducing totipotency in an ESC in culture, methods of improving the reprogramming efficiency of a somatic cell into an induced pluripotent stem cell and methods of reprogramming a somatic cell into a totipotent stem cell by inducing Nelfa expression. Cells comprising an expression vector encoding Nelfa and kits for use in the methods of the invention are also provided.