Modeling of molecular and cellular mechanisms involved in [Ca sup 2+] signal encoding in airway myocytes

Marko Marhl (Author), Denis Noble (Author), Etienne Roux (Author)

Abstract

In airway myocytes signal transduction via cytosolic calcium plays an important role. In relation with experimental results we review models of basic molecular and cellular mechanisms involved in the signal transduction from the myocyte stimulation to the activation of the contractile apparatus. We concentrate on mechanisms for encoding of input signals into Ca2+ signals and the mechanisms for their decoding. The mechanisms are arranged into a general scheme of cellular signaling, the so-called bow-tie architecture of signaling, in which calcium plays the role of a common media for cellular signals and links the encoding and decoding part. The encoding of calcium signals in airway myocytes is better known and is presented in more detail. Inparticular, we focus on three recent models taking into account the intracellular calcium handling and ion fluxes through the plasma membrane. Themodel of membrane conductances was originally proposed for predicting membrane depolarization and voltage-dependent Ca2+ influx triggered by initialcytosolic Ca2+ increase as observed on cholinergic stimulation. Cellular models of intracellular Ca2+ handling were developed to investigate the role of a mixed population of InsP3 receptor isoforms and the cellular environment in the occurrence of Ca2+ oscillations, and the respective role ofthe sarcoplasmic reticulum, mitochondria, and cytosolic Ca2+-binding proteins in cytosolic Ca2+ clearance. Modeling the mechanisms responsible for the decoding of calcium signals is developed in a lesser extent; however, the most recent theoretical studies are briefly presented in relation with the known experimental results.

Keywords

biofizika;matematično modeliranje;modeliranje;kalcijeve oscilacije;gladke mišice;krčenje mišic;vkodiranje;dekodiranje;matematični modeli;ne zaključna dela;biophysics;mathematical modelling;modelling;calcium oscillations;contractions;airway smooth muscle cells;muscle cells;smooth muscles;encoding;decoding;bow-tie structures;

Data

Language:	English
Year of publishing:	2006
Typology:	1.02 - Review Article
Organization:	UM FNM - Faculty of Natural Sciences and Mathematics
UDC:	577.353
COBISS:	15169288
ISSN:	1085-9195
Views:	1842
Downloads:	43
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	Biofizika;
URN:	URN:SI:UM:
Type (COBISS):	Article
Pages:	str. 285-302
Volume:	ǂVol. ǂ46
Issue:	ǂno. ǂ3
Chronology:	2006
ID:	8724210