Hence, it appears that there is a coupling, however not strong, between Dreissena fitness and tissue P content and probably food P concentrations.
Viral RNA isolated from faeces of treated animals showed decreased specific infectivity, and infectious virus from faeces showed decreased fitness in tissue culture.
This model thus proposes that the fitness value of oncogenic events is limited and mostly negative in young highly fit tissues optimized by evolution at the germline level, but their fitness effects may increase in aged tissues, facilitating somatic evolution.
Furthermore, a given gene may enhance fitness for tissue-specific disease, yet an isolate lacking this gene can still cause disease.
Second, we tested whether the absence of azot accelerates tissue fitness decay in adult tissues.
Additionally, we measured competitive fitness in standard tissue culture medium (RPMI) with and without drug in vitro.
As introduced above, we have proposed an alternative model, dubbed Adaptive Oncogenesis, which proposes that youth and high tissue fitness are actually tumor suppressive [ 10, 11, 16].
12 The first rounds of both stages will be conducted electronically with an estimated total of 108 case vignettes representing combinations of different morphological, age, fitness and connective tissue factors.
Several papers have highlighted an important role of p53 in tissue fitness through its impact in preventing mobilization of stem cells harboring persistent DNA damage (ie, dysfunctional telomeres) [ 76, 77].
An alternative model proposes that cancer development is rate-limited by the dynamics of age-dependent tissue fitness decline (and is thus tightly linked to the evolution of lifespan and aging), whereby cells in aged tissues of lower general fitness provide more room for positive selection for oncogenic events that have accumulated in tissues over a lifetime [ 23, 24, 34].
