摘要:
Aspects of the present invention relate to methods to differentiate pluripotent primordial stem cells, such as human embryonic stem (“hES”) cells, human embryonic germ (“hEG”) cells, human embryo-derived (“hED”) cells and human embryonal carcinoma (“hEC”) cells, to obtain subpopulations of cells from heterogeneous mixtures of cells, wherein the subpopulation of cells possess reduced differentiation potential compared to the original pluripotent stem cells and where the subpopulation is capable of being propagated 20 or more population doublings. This invention also provides novel compositions of such subpopulations of cells and methods to propagate and differentiate said cells.
摘要:
Filamentous phage particles displaying a ligand on their surface are used to deliver a therapeutic gene to a cell. The ligand is a fusion protein with a phage capsid protein, covalently conjugated to phage particles, or complexed with modified phage particles.
摘要:
A genetic package display system and methodology for probing protein-protein interactions that lead to cell transduction, selecting and/or identifying internalizing ligands, target cells and tissues which internalize known or putative ligands, and cell transduction facilitating peptides is provided. A ligand displaying genetic package that carries a selectable marker (e.g., reporter, selection, etc.) and presents a ligand on its surface is utilized to identify internalizing ligands, tranduction facilitating peptides, and/or a variety of cells and tissue types for the ability to be successfully transduced by the ligand displaying genetic package. Also provided are methods for evolving a ligand displaying package to facilitate gene delivery or delivery of any desired agent (e.g., pharmaceutical, polypeptide, peptide, etc.) into a cell and/or targeting cellular compartments such as the nucleus, endosome, chloroplast, mitochondria, etc.
摘要:
The present invention provides methods for the identification of novel ligands to pluripotent stem cells such as human embryonic stem cells, human embryo-derived cells, and from cells differentiated from such cells, and the use of such ligands in identifying differentiation conditions, purifying cells, and for eliminating such cells from mixtures of varied cell types. The invention also provides methods for the identification of target progenitor cells and cells identified thereby.
摘要:
Filamentous phage particles displaying a ligand on their surface are used to deliver a therapeutic gene to a cell. The ligand is a fusion protein with a phage capsid protein, covalently conjugated to phage particles, or complexed with modified phage particles.
摘要:
A method for identifying specific protein-protein (i.e., ligand/anti-ligand) interactions that internalize and are detected by transgene expression. A ligand displaying genetic package that carries a reporter or selectable marker and presents a ligand or putative ligand on its surface is utilized to screen cells displaying known or putative anti-ligands for the ability to successfully internalize the ligand displaying genetic package.
摘要:
A method for identifying target cells and tissues which internalize known or putative ligands is provided. A ligand displaying genetic package that carries a reporter or selectable marker and presents a ligand on its surface is utilized to screen a variety of cells and tissue types for the ability to be successfully transduced by the ligand displaying genetic package.
摘要:
A genetic package display system is presented for selecting internalizing ligands for gene delivery. The genetic package carries a reporter, selectable marker, or a specifically detectable nucleic acid sequence and presents a ligand on its surface. More specifically, a library of potential ligands may be screened for the ability to successfully transduce target cells.
摘要:
Filamentous phage particles displaying a ligand on their surface are used to deliver a therapeutic gene to a cell. The ligand is a fusion protein with a phage capsid protein, covalently conjugated to phage particles, or complexed with modified phage particles.