title: Deletion of the amino-terminal domain of the prion protein does not impair prion protein-dependent neuronal differentiation and neuritogenesis.
abstract: The cellular prion protein (PrP(C)) is a highly conserved glycoprotein of unknown biological function. To gain insight into the physiological role of PrP(C), we generated a novel PrP knockout cell line, named PrP(o/o) ML, by immortalization of neuroepithelial precursor cells derived from the cerebellum of PrP-knockout mice using the temperature-sensitive simian virus 40 (SV40) large T antigen. We demonstrated that the PrP(o/o) ML cell line is a unipotent precursor line with glutamatergic properties, which can acquire neuronal features when cultivated under specific conditions. The role of the prion protein in the process of neuronal differentiation was then analyzed in the PrP(o/o) ML cells reconstituted with either the full-length or an amino-terminally deleted form of the prion protein. We show that the expression of PrP(C) facilitates the processes of neuronal differentiation and neuritogenesis and that the deletion of its amino-terminal domain reduces the efficiency, but does not suppress this activity. This cell line represents a useful tool for studying PrP-dependent signal transduction pathways during differentiation of neuronal stem/precursor cells.
authors.affiliation: Prion Research Group, Paul-Ehrlich-Institut, Langen, Germany.
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Barenco
authors.forename: Chiara F
authors.initials: CF
authors.lastname: Valori
authors.forename: Chiara
authors.initials: C
authors.lastname: Roncoroni
authors.forename: Johannes
authors.initials: J
authors.lastname: Loewer
authors.forename: Fabio
authors.initials: F
authors.lastname: Montrasio
authors.forename: Daniela
authors.initials: D
authors.lastname: Rossi
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D004268:DNA-Binding Proteins; D005455:Fluorescent Antibody Technique; D018698:Glutamic Acid / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D051379:Mice; D018345:Mice, Knockout; D009419:Nerve Tissue Proteins / Q000378:metabolism; D016501:Neurites / Q000502:physiology*; D055495:Neurogenesis / Q000502:physiology*; D009474:Neurons / Q000502:physiology* / Q000648:ultrastructure; D009687:Nuclear Proteins / Q000378:metabolism; D010749:Phosphoprotein Phosphatases / Q000378:metabolism; D018621:PrPC Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D017384:Sequence Deletion; D013696:Temperature; D014162:Transfection
chemical_list: D004268:DNA-Binding Proteins; D036341:Intercellular Signaling Peptides and Proteins; D009419:Nerve Tissue Proteins; C492380:NeuN protein, mouse; D009687:Nuclear Proteins; D018621:PrPC Proteins; D018698:Glutamic Acid; C049301:microtubule-associated protein-2 phosphatase; D010749:Phosphoprotein Phosphatases