Definition of Aging Aging: The process of becoming older, a
process that is genetically determined and environmentally
modulated. Research into aging: To sum up the state of research
into aging is well beyond the confines of this space (and this
writer's talents). However, here is one type of research into
the genetics of aging. A gene has been discovered that helps
determine the life-span of the fruit fly Drosophila. When the
gene is mutated (altered), it can extend the life-span of fruit
flies. It doubles their life-span. The gene has been named Indy
(for I'm not dead yet). It appears that the protein encoded by
this gene transports and recycles metabolic byproducts. Defects
in the gene may lead to production of a protein that renders
metabolism less efficient so that its body functions as if the
fruit fly were dieting, even though its eating habits are
unchanged. Mutations in Indy thus appear to create a metabolic
state that mimics caloric restriction, which has been shown to
extend life-span. Reference: R