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Erschienen in: Neurotoxicity Research 4/2009

01.05.2009

Non-hypoxic Stabilization of Hypoxia-Inducible Factor Alpha (HIF-α): Relevance in Neural Progenitor/Stem Cells

verfasst von: Javorina Milosevic, Irena Adler, Anatol Manaenko, Sigrid C. Schwarz, Gail Walkinshaw, Michael Arend, Lee A. Flippin, Alexander Storch, Johannes Schwarz

Erschienen in: Neurotoxicity Research | Ausgabe 4/2009

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Abstract

Hypoxia-inducible factor-1 (HIF-1) plays an important role in neural progenitor cell (NPC) propagation and dopaminergic differentiation. In the presence of oxygen and iron, hypoxia-inducible factor 1 alpha (HIF-1α) is rapidly degraded via the prolyl hydroxylase (PHD)/VHL pathway. In addition to hypoxia, various non-hypoxic stimuli can stabilize HIF-1α in NPCs and influence the transcription of HIF-regulated genes. Here, we investigate various hypoxia mimetics: deferoxamine (DFO), ciclopirox olamine (CPX), dimethyloxallyl glycine (DMOG), a novel HIF-PHD inhibitor (FG-4497) and cobalt chloride (CoCl2) with respect to their ability to enhance in vitro proliferation, neurogenesis and dopaminergic differentiation of human fetal mesencephalic NPCs (hmNPCs) in ambient oxygen (21%). Although able to stabilize HIF-1α, iron chelators (DFO and CPX) and DMOG were toxic to hmNPCs. CoCl2 was beneficial only towards neuronal and dopaminergic differentiation, while FG-4497 enhanced proliferation, neurogenesis and dopaminergic differentiation of hmNPCs. Both CoCl2 and FG-4497 were protective to human dopaminergic neurons. Finally, exposure to hyperbaric oxygen (HBO) also stabilized HIF-1α in hmNPCs and induced neurogenesis in vitro. These findings suggest that several HIF stabilizing agents or conditions can rescue impaired neurons and promote neurogenesis in vitro.
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Metadaten
Titel
Non-hypoxic Stabilization of Hypoxia-Inducible Factor Alpha (HIF-α): Relevance in Neural Progenitor/Stem Cells
verfasst von
Javorina Milosevic
Irena Adler
Anatol Manaenko
Sigrid C. Schwarz
Gail Walkinshaw
Michael Arend
Lee A. Flippin
Alexander Storch
Johannes Schwarz
Publikationsdatum
01.05.2009
Verlag
Springer-Verlag
Erschienen in
Neurotoxicity Research / Ausgabe 4/2009
Print ISSN: 1029-8428
Elektronische ISSN: 1476-3524
DOI
https://doi.org/10.1007/s12640-009-9043-z

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Konsumieren Menschen täglich 7 Gramm Olivenöl, ist ihr Risiko, an einer Demenz zu sterben, um mehr als ein Vierten reduziert – und dies weitgehend unabhängig von ihrer sonstigen Ernährung. Dafür sprechen Auswertungen zweier großer US-Studien.

Bluttest erkennt Parkinson schon zehn Jahre vor der Diagnose

10.05.2024 Parkinson-Krankheit Nachrichten

Ein Bluttest kann abnorm aggregiertes Alpha-Synuclein bei einigen Menschen schon zehn Jahre vor Beginn der motorischen Parkinsonsymptome nachweisen. Mit einem solchen Test lassen sich möglicherweise Prodromalstadien erfassen und die Betroffenen früher behandeln.

Darf man die Behandlung eines Neonazis ablehnen?

08.05.2024 Gesellschaft Nachrichten

In einer Leseranfrage in der Zeitschrift Journal of the American Academy of Dermatology möchte ein anonymer Dermatologe bzw. eine anonyme Dermatologin wissen, ob er oder sie einen Patienten behandeln muss, der eine rassistische Tätowierung trägt.

Wartezeit nicht kürzer, aber Arbeit flexibler

Psychotherapie Medizin aktuell

Fünf Jahren nach der Neugestaltung der Psychotherapie-Richtlinie wurden jetzt die Effekte der vorgenommenen Änderungen ausgewertet. Das Hauptziel der Novellierung war eine kürzere Wartezeit auf Therapieplätze. Dieses Ziel wurde nicht erreicht, es gab jedoch positive Auswirkungen auf andere Bereiche.

Update Neurologie

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