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Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro
Published on: November 24, 2015
Novel peptide ligands that bind specifically to mouse embryonic stem cells
Saijuan Zhao1, Wenxiu Zhao, Lan Ma
1Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, China.
Peptides
|August 18, 2010
Summary
Researchers identified a specific peptide ligand (Seq2) that binds to mouse embryonic stem (ES) cells. This discovery offers a new method for labeling and identifying these crucial cells for research and potential therapies.
Area of Science:
- Stem Cell Biology
- Biotechnology
- Molecular Biology
Background:
- Identifying specific markers for embryonic stem (ES) cells is crucial for their isolation, visualization, and therapeutic applications.
- Existing methods for ES cell identification may lack the specificity or efficiency required for certain research and clinical contexts.
Purpose of the Study:
- To isolate novel peptide ligands that exhibit high affinity and specificity for mouse embryonic stem (ES) cells using phage display technology.
- To evaluate the potential of these peptide ligands as targeting agents for ES cell identification and characterization.
Main Methods:
- Phage display technology was employed for four rounds of negative-positive selection to isolate peptide ligands binding to mouse ES cells.
- Enzyme-linked immunosorbent assay (ELISA) was used to assess the affinity and specificity of selected peptide ligands.
- Immunofluorescence and Western blot analyses were performed to confirm the binding of the peptide to ES cells and identify target proteins.
Main Results:
- Nine unique 12-mer peptide sequences were selected, with Seq2 (KHMHWHPPALNT) demonstrating high affinity and specificity for mouse ES cells.
- The binding capability was confirmed to be inherent to the peptide sequence, independent of the phage display vehicle.
- Immunofluorescence showed selective binding of Seq2 to undifferentiated ES cells, while Western blot indicated interaction with two specific membrane proteins (18/20KD).
Conclusions:
- The identified Seq2 peptide serves as a specific targeting agent for mouse embryonic stem cells.
- These peptide ligands represent a promising tool for the labeling, identification, and characterization of ES cells in research and potentially in clinical settings.
