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(Tissue) P systems with cell polarity

Published online by Cambridge University Press:  04 December 2009

DANIELA BESOZZI
Affiliation:
Università degli Studi di Milano, Dipartimento di Informatica e Comunicazione, Via Comelico 39, 20135 Milano, Italy Email: besozzi@dico.unimi.it
PAOLO CAZZANIGA
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it
CLAUDIO FERRETTI
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it
ALBERTO LEPORATI
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it
GIANCARLO MAURI
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it
DARIO PESCINI
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it
CLAUDIO ZANDRON
Affiliation:
Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy Email: cazzaniga@disco.unimib.it; ferretti@disco.unimib.it; leporati@disco.unimib.it; mauri@disco.unimib.it; pescini@disco.unimib.it; zandron@disco.unimib.it

Abstract

We consider the structure of the intestinal epithelial tissue and of cell–cell junctions as the biological model inspiring a new class of P systems. First we define the concept of cell polarity, a formal property derived from epithelial cells, which present morphologically and functionally distinct regions of the plasma membrane. Then we show two preliminary results for this new model of computation: on the theoretical side, we show that P systems with cell polarity are computationally (Turing) complete; on the modelling side, we show that the transepithelial movement of glucose from the intestinal lumen into the blood can be described by such a formal system. Finally, we define tissue P systems with cell polarity, where each cell has fixed connections to the neighbouring cells and to the environment, according to both the cell polarity and specific cell–cell junctions.

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Type
Paper
Copyright
Copyright © Cambridge University Press 2009

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