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Models of Cellular Regulation$
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Baltazar Aguda, Avner Friedman, and Visiting Associate Professor, The Ohio State University

Print publication date: 2008

Print ISBN-13: 9780198570912

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780198570912.001.0001

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Cell aging and renewal

Cell aging and renewal

(p.139) 10 Cell aging and renewal
Models of Cellular Regulation

Baltazar D. Aguda

Avner Friedman

Oxford University Press

Cellular aging, commonly referred to as cellular senescence, is thought to be a ‘programmed’ cell fate in a similar sense that apoptosis is somehow programmed to happen to certain cells during development. A specific kind of aging called replicative senescence is characterized by a cell's permanent exit from the cell cycle after undergoing a certain number of divisions. One of the known causes of replicative senescence is telomere shortening after each division. Telomeres are the ends of linear eukaryotic chromosomes. This chapter discusses a model involving replicative senescence of cells lining the walls of blood vessels. Both a probabilistic model tracking individual cells and a deterministic model of the cell population dynamics are illustrated. Exercises are given at the end of the chapter.

Keywords:   cellular senescence, telomeres, aging, stem cell division, Roeder–Loeffler model, probabilities model, continuum model

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