Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
1996-06-20
Nonlinear Sciences
Adaptation and Self-Organizing Systems
LatexText,figures are not included.Bull.Math.Biol., in press
Scientific paper
Isologous diversification theory for cell differentiation is proposed, based on simulations of interacting cells with biochemical networks and cell division process following consumption of some chemicals. According to the simulations of the interaction-based dynamical systems model, the following scenario of the cell differentiation is proposed. (1) Up to some threshold number, divisions bring about almost identical cells with synchronized biochemical oscillations. (2)As the number is increased the oscillations lose the synchrony, leading to groups of cells with different phases of oscillations. (3)Amplitudes of oscillation and averaged chemical compositions start to differ by groups of cells. The differentiated behavior of states is transmitted to daughter cells. (4)Recursivity is formed so that the daughter cells keep the identical chemical character. This ``memory" is made possible through the transfer of initial conditions. (5) Successive differentiation proceeds. Mechanism of tumor cell formation, origin of stem cells, anomalous differentiation by transplantations, apoptosis and other features of cell differentiation process are also discussed, with some novel predictions. (Keywords: differentiation, chemical network, cell division, clustering, open chaos)
Kaneko Kunihiko
Yomo Tetsuya
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