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-γ (IFN-γ) contributes to HUCBNP differentiation. IFN-γ was detected in the CM used for the induction of differentiation of HUCBNP and a neutralizing antibody of IFN-γ significantly inhibited either IFN-γ 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-γ-receptor signal transducer and activator of transcription) and chemokine C-X-C motif ligand 5). Treatment of HUCBNP with human recombinant IFN-γ, inhibited cell proliferation in a dose-dependent manner. IFN-γ (1–100 ng/ml) enhanced neuronal differentiation, expressed by neurite outgrowths and increased expression of the neuronal markers β-tubulin III, microtubule-associated protein 2, neuronal nuclei, neurofilament M and neuronal-specific enolase. IFN-γ additively cooperated with NGF to induce the differentiation of HUCBNP. These data indicate that IFN-γ promotes neuronal differentiation of HUCB-derived progenitors, proposing its use in future protocols towards cell therapy.
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Acknowledgements
The authors would like to thank Mrs Jasmine Jacob-Hirsch for the technical help with functional genomics. PL is affiliated with and supported in part by David R Bloom Center for Pharmacy and the Dr Adolf and Klara Brettler Center for Research in Molecular Pharmacology and Therapeutics at The Hebrew University of Jerusalem, Israel.
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Arien-Zakay, H., Lecht, S., Bercu, M. et al. Interferon-γ-induced neuronal differentiation of human umbilical cord blood-derived progenitors. Leukemia 23, 1790–1800 (2009). https://doi.org/10.1038/leu.2009.106
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DOI: https://doi.org/10.1038/leu.2009.106
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