Auszug
Alle Lebewesen sind trotz einer ständigen Erneuerung ihrer organischen Substanz der Alterung unterworfen. Was das Altern ausmacht ist nicht wirklich verstanden. Nicht nur die Biochemie der Organismen, insbesondere die Bildung, der Abraum und die Nachbildung von Proteinen, ist Teil der fortlaufenden Erneuerung, sondern es werden auch in fast allen Organen beständig alternde Zellen ausgewechselt. Nur die Zellen von Herz und Gehirn sind weit überwiegend postmitotisch, d.h. sie teilen sich nicht mehr und müssen daher lebenslang überdauern. Bei den Lebensprozessen kommt es zu Fehlern. Diese werden erkannt und können in der Regel durch geeignete Reparaturmechanismen ausgeglichen werden. Im Folgenden wird die Annahme begründet und geprüft, dass das Altern von Organen und Organismen die Folge und nicht die Ursache einer lebenslang fortschreitenden Schwächung von Reparaturmechanismen ist.
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Dichgans, J. (2008). Jugend ist Stärke und Alter ist Schwäche der Reparaturmechanismen. In: Staudinger, U.M., Häfner, H. (eds) Was ist Alter(n)?. Schriften der Mathematisch-naturwissenschaftlichen Klasse der Heidelberger Akademie der Wissenschaften, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-76711-4_5
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