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Erschienen in: Zeitschrift für Gerontologie und Geriatrie 2/2012

01.02.2012 | Beiträge zum Themenschwerpunkt

Oxidativer Stress im Endothel und bei Diabetes Typ 2

verfasst von: A. Eckers, J. Altschmied, Dr. J. Haendeler

Erschienen in: Zeitschrift für Gerontologie und Geriatrie | Ausgabe 2/2012

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Zusammenfassung

Reaktive Sauerstoffspezies (ROS) sind wichtige Signalmoleküle in menschlichen Zellen. Physiologische Konzentrationen schützen beispielsweise vor Apoptose und wirken als sekundärer Botenstoff in vielen verschiedenen Signalwegen. Die Redoxhomöostase stellt das physiologische Gleichgewicht zwischen Bildung und Abbau von ROS dar. Störungen der Redoxhomöostase führen zu erhöhten ROS-Spiegeln und damit zu sog. oxidativen Stress. Dieser schädigt Makromoleküle und begünstigt die Entstehung von Krankheiten sowie das Voranschreiten des Alternsprozesses. Der Organismus verfügt über verschiedenste Enzymsysteme, um einen Überschuss von ROS zu eliminieren. Deren Inaktivierung oder Abbau unter Bedingungen oxidativen Stresses ist eng mit endothelialer Dysfunktion aufgrund von Endothelzellapoptose, Verlust von Telomeraseaktivität und Telomerverkürzung verknüpft. Eine eingeschränkte Endothelfunktion verursacht kardiovaskuläre Erkrankungen und Diabetes Typ 2.
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Metadaten
Titel
Oxidativer Stress im Endothel und bei Diabetes Typ 2
verfasst von
A. Eckers
J. Altschmied
Dr. J. Haendeler
Publikationsdatum
01.02.2012
Verlag
Springer-Verlag
Erschienen in
Zeitschrift für Gerontologie und Geriatrie / Ausgabe 2/2012
Print ISSN: 0948-6704
Elektronische ISSN: 1435-1269
DOI
https://doi.org/10.1007/s00391-011-0277-z

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