title: Interferon-gamma-induced neuronal differentiation of human umbilical cord blood-derived progenitors.
abstract: Human umbilical cord blood (HUCB) provides a source of progenitors for cell therapy. We isolated and characterized an HUCB-derived population of progenitors (HUCBNP), differentiated toward neuronal phenotype by human neuroblastoma-conditioning medium (CM) and nerve growth factor (NGF), which have been found to confer neuroprotection toward hypoxia-mediated neuronal injury. This study investigated whether interferon-gamma (IFN-gamma) contributes to HUCBNP differentiation. IFN-gamma was detected in the CM used for the induction of differentiation of HUCBNP and a neutralizing antibody of IFN-gamma significantly inhibited either IFN-gamma or CM-induced differentiation. Transcriptome analysis of CM-differentiated HUCBNP, identified 86 genes as highly upregulated, among them 25 were IFN-induced (such as 2',5'-oligoadenylate synthetase 1 and 2, IFN-induced protein and transmembrane proteins, STAT1 (IFN-gamma-receptor signal transducer and activator of transcription) and chemokine C-X-C motif ligand 5). Treatment of HUCBNP with human recombinant IFN-gamma, inhibited cell proliferation in a dose-dependent manner. IFN-gamma (1-100 ng/ml) enhanced neuronal differentiation, expressed by neurite outgrowths and increased expression of the neuronal markers beta-tubulin III, microtubule-associated protein 2, neuronal nuclei, neurofilament M and neuronal-specific enolase. IFN-gamma additively cooperated with NGF to induce the differentiation of HUCBNP. These data indicate that IFN-gamma promotes neuronal differentiation of HUCB-derived progenitors, proposing its use in future protocols towards cell therapy.
authors.affiliation: Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel.
authors.forename: H
authors.initials: H
authors.lastname: Arien-Zakay
authors.forename: S
authors.initials: S
authors.lastname: Lecht
authors.forename: M M
authors.initials: MM
authors.lastname: Bercu
authors.forename: N
authors.initials: N
authors.lastname: Amariglio
authors.forename: G
authors.initials: G
authors.lastname: Rechavi
authors.forename: H
authors.initials: H
authors.lastname: Galski
authors.forename: P
authors.initials: P
authors.lastname: Lazarovici
authors.forename: A
authors.initials: A
authors.lastname: Nagler
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000235:genetics / Q000378:metabolism; D000970:Antineoplastic Agents / Q000494:pharmacology*; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D015153:Blotting, Western; D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D017077:Culture Media, Conditioned / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D005312:Fetal Blood / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D020869:Gene Expression Profiling; D006801:Humans; D007124:Immunoenzyme Techniques; D007371:Interferon-gamma / Q000494:pharmacology*; D009447:Neuroblastoma / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D009474:Neurons / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins; D020133:Reverse Transcriptase Polymerase Chain Reaction; D050794:STAT1 Transcription Factor / Q000235:genetics / Q000378:metabolism; D013234:Stem Cells / Q000187:drug effects* / Q000378:metabolism
chemical_list: D000970:Antineoplastic Agents; D014408:Biomarkers, Tumor; D017077:Culture Media, Conditioned; D012333:RNA, Messenger; D011994:Recombinant Proteins; D050794:STAT1 Transcription Factor; C494079:STAT1 protein, human; D007371:Interferon-gamma; D015088:2',5'-Oligoadenylate Synthetase