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Invecchiamento e tumori

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Title: PowerPoint Presentation Author: Marco Crescenzi Last modified by: Marco Crescenzi Created Date: 4/21/2005 6:21:23 AM Document presentation format – PowerPoint PPT presentation

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Title: Invecchiamento e tumori


1
Invecchiamento e tumori
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La linea germinale e' immortale
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Massima durata di vita misurata (animali)
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Massima durata di vita misurata (piante)
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Curve di Gompertz
Ricklefs e Finch. Aging, a natural history.
Scientific American Library, 1995
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Livelli d'indagine sull'invecchiamento
Molecola Cellula Organismo
?
?
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Z.A. Medvedev. Biol. Rev. 65375-398, 1990
15
Modificata da T.B.L. Kirkwood Cell 120437-447,
2005
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Trasformazione in vitro di cellule di roditore
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Trasformazione in vitro di cellule umane
These diverse observations, taken together,
embolden us to conclude that five distinct
alterations suffice to transform normal human
cells into tumor cells. Interestingly, only two
or three of these changes seem to be required for
rodent-cell transformation, explaining in
retrospect the great difficulty experienced in
early attempts to transform human cells. W.C
Hahn et al. New Engl J Med 3471593-1603, 2002
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Modificata da J. Bartkova et al. Nature
444633-637, 2006
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oncogeni
senescenza dell'organismo
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L'invecchiamento e' inevitabile?
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Knockout della proteina p66shc
Modificata da E. Migliaccio et al. Nature
402309, 1999
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