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2015 ; 10
(9
): e0133825
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Multi-Target Analysis and Design of Mitochondrial Metabolism
#MMPMID26376088
Angione C
; Costanza J
; Carapezza G
; Lió P
; Nicosia G
PLoS One
2015[]; 10
(9
): e0133825
PMID26376088
show ga
Analyzing and optimizing biological models is often identified as a research
priority in biomedical engineering. An important feature of a model should be the
ability to find the best condition in which an organism has to be grown in order
to reach specific optimal output values chosen by the researcher. In this work,
we take into account a mitochondrial model analyzed with flux-balance analysis.
The optimal design and assessment of these models is achieved through single-
and/or multi-objective optimization techniques driven by epsilon-dominance and
identifiability analysis. Our optimization algorithm searches for the values of
the flux rates that optimize multiple cellular functions simultaneously. The
optimization of the fluxes of the metabolic network includes not only input
fluxes, but also internal fluxes. A faster convergence process with robust
candidate solutions is permitted by a relaxed Pareto dominance, regulating the
granularity of the approximation of the desired Pareto front. We find that the
maximum ATP production is linked to a total consumption of NADH, and reaching the
maximum amount of NADH leads to an increasing request of NADH from the external
environment. Furthermore, the identifiability analysis characterizes the type and
the stage of three monogenic diseases. Finally, we propose a new methodology to
extend any constraint-based model using protein abundances.