cron-web.org

[A1CR]

[Posted on behalf of c4hf; 2003-01-03]

If there is an abstract aficianado out there who can get the full-text, this
may interesting to numbers-oriented individuals. These Dutch folks think
they have deconstructed the effects of CR into pure mathematics.

Either they are on to something big, or they simply watched the movie "Pi"
too many times.

Of note, they found that conditions changed for "non-growing" animals, with
things reducing to the Gompertz equation. Is this ominous for late-lifers?

[In my opinion, get your cholesterol down any way you can. ]

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Biogerontology 2002;3(6):373-81 Related Articles, Links

A mathematical model that accounts for the effects of caloric restriction on
body weight and longevity.

Van Leeuwen IM, Kelpin FD, Kooijman SA.

Department of Theoretical Biology, Institute of Ecological Science, Vrije
Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands; Author
for correspondence (e-mail: ingeborg@bio.vu.nl; fax: +31-20-4447123)

Several aspects of energy dynamics, such as energy expenditure and caloric
intake, are known to affect the aging process. In this article we therefore
model the aging process within a mathematical framework describing the
energy dynamics of an organism. The resulting model comprises food intake,
body growth and survival. The equation for the mortality rate accounts for
food consumption and is suited to describe caloric restriction data. For
non-growing animals, the expression for the mortality rate reduces to the
well-known Gompertz equation. We successfully applied our model to growth
and survival data on mice exposed to different food levels.