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2015 ; 59
(sup1
): 45-50
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Aging in the colonial chordate, Botryllus schlosseri
#MMPMID26136620
Munday R
; Rodriguez D
; Di Maio A
; Kassmer S
; Braden B
; Taketa DA
; Langenbacher A
; De Tomaso A
Invertebr Reprod Dev
2015[Jan]; 59
(sup1
): 45-50
PMID26136620
show ga
What mechanisms underlie aging? One theory, the wear-and-tear model, attributes
aging to progressive deterioration in the molecular and cellular machinery which
eventually lead to death through the disruption of physiological homeostasis. The
second suggests that life span is genetically programmed, and aging may be
derived from intrinsic processes which enforce a non-random, terminal time
interval for the survivability of the organism. We are studying an organism that
demonstrates both properties: the colonial ascidian, Botryllus schlosseri.
Botryllus is a member of the Tunicata, the sister group to the vertebrates, and
has a number of life history traits which make it an excellent model for studies
on aging. First, Botryllus has a colonial life history, and grows by a process of
asexual reproduction during which entire bodies, including all somatic and
germline lineages, regenerate every week, resulting in a colony of genetically
identical individuals. Second, previous studies of lifespan in genetically
distinct Botryllus lineages suggest that a direct, heritable basis underlying
mortality exists that is unlinked to reproductive effort and other life history
traits. Here we will review recent efforts to take advantage of the unique life
history traits of B. schlosseri and develop it into a robust model for aging
research.