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The search for new receptor ligands is important in the study of embryonic stem (ES) cell differentiation processes. In this study, a novel peptide (HGEVPRFHAVHL) with a specific ability to bind with neural stem cells derived from rhesus monkey ES cells was successfully screened out using a Ph.D-12 peptide phage display library. High affinity and specificity of the HGE phage were shown in an enzyme-linked immunosorbent assay. The binding ability of the phage could be matched with that of a chemically synthesized peptide with a sequence identical to that displayed by the phage, indicating that this binding capability manifests a peptide sequence. Combined with quantum dots, the HGE peptide can be used as a direct tool to show optical imaging of specific binding on a single cell membrane. Further results of Western blot showed that the HGE peptide interacted with 48/34-kDa proteins on the membrane of neural stem cells. This work is the first time that a phage display technique has been applied in ES cell differentiation studies. The findings extend the utilization of a targeting agent for neural stem cells and can also be used as a research tool in studying other cell lineages derived from ES cells.

slas discovery

Isolation and Initial Application of a Novel Peptide That Specifically Recognizes the Neural Stem Cells Derived from Rhesus Monkey Embryonic Stem Cells