Aging is the progressive decline in biological functions over time. This
decline targets macromolecules, cells, tissues and, as a consequence,
whole organisms. Despite considerable progress in the development of
testable hypothesis concerning aging in an evolutionary context, a
unifying theory of the molecular/physiological mechanistic causes of
aging has not been reached. In fact, is it not clear to what extent
aging is a programmed or stochastic process.
This book takes the reader from unicellular bacterial deterioration via
senescence in fungi and worms to aging in rodents and humans, allowing a
comparative view on similarities and differences in different genetic
model systems. The different model systems are scrutinized in the light
of contemporary aging hypothesis, such as the free radical and genomic
instability theories.