Many cellular processes require decision making mechanisms, which must act reliably even in the unavoidable presence of
substantial amounts of noise. However, the multistable genetic switches that underlie most decision-making processes are
dominated by fluctuations that can induce random jumps between alternative cellular states. Here we show, via theoretical
modeling of a population of noise-driven bistable genetic switches, that reliable timing of decision-making processes can
be accomplished for large enough population sizes, as long as cells are globally coupled by chemical means. In the light of these results, we conjecture that cell proliferation, in the presence of cell–cell communication, could provide a mechanism
for reliable decision making in the presence of noise, by triggering cellular transitions only when the whole cell population reaches a certain size. In other words, the summation performed by the cell population would average out the noise and reduce its detrimental impact.
CitacióKoseska, A. [et al.]. Timing cellular decision making under noise via cell-cell communication. "PLOS one", 13 Març 2009, vol. 4, núm. 3, p. 1-6.