The phenomenon of receptor-receptor interactions was hypothesized by Agnati and Fuxe in the 1980s, and several indirect proofs were provided in the following years by means of in vitro binding experiments and in vivo experiments in physiological and pathological animal models. This paper aims to outline some of the most important features and consequences of this phenomenon in the frame of the structural and functional aspects of molecular networks. In particular, the concepts of receptor mosaic (RM), and of horizontal and vertical molecular networks (HMNs, VMNs, respectively) are illustrated. To discuss some aspects of the functional organization of molecular networks, not only new data on protein-protein interactions but also the biochemical mechanism of cooperativity will be used. On this basis, some theoretical deductions can be drawn that allow a tentative classification of the RMs and the proposal of the extension of the concept of branching point introduced for enzymes to the possible switching role of some RMs in directing signals to various VMNs. Finally, the cooperativity phenomenon and the so-called symmetry rule will be used to introduce a proper mathematical approach that characterizes RMs as to their receptor composition, receptor topography, and order of receptor activation inside the RM. These new data on G protein-coupled receptors and molecular network organization indicate possible new approaches for drug development.

Receptor-receptor interactions, receptor mosaics, and basic principles of molecular network organization - Possible implications for drug development / Agnati, Luigi Francesco; Tarakanov, A. O.; S., Ferre; K., Fuxe; D., Guidolin. - In: JOURNAL OF MOLECULAR NEUROSCIENCE. - ISSN 0895-8696. - STAMPA. - 26(2005), pp. 193-208.

Receptor-receptor interactions, receptor mosaics, and basic principles of molecular network organization - Possible implications for drug development

AGNATI, Luigi Francesco;
2005

Abstract

The phenomenon of receptor-receptor interactions was hypothesized by Agnati and Fuxe in the 1980s, and several indirect proofs were provided in the following years by means of in vitro binding experiments and in vivo experiments in physiological and pathological animal models. This paper aims to outline some of the most important features and consequences of this phenomenon in the frame of the structural and functional aspects of molecular networks. In particular, the concepts of receptor mosaic (RM), and of horizontal and vertical molecular networks (HMNs, VMNs, respectively) are illustrated. To discuss some aspects of the functional organization of molecular networks, not only new data on protein-protein interactions but also the biochemical mechanism of cooperativity will be used. On this basis, some theoretical deductions can be drawn that allow a tentative classification of the RMs and the proposal of the extension of the concept of branching point introduced for enzymes to the possible switching role of some RMs in directing signals to various VMNs. Finally, the cooperativity phenomenon and the so-called symmetry rule will be used to introduce a proper mathematical approach that characterizes RMs as to their receptor composition, receptor topography, and order of receptor activation inside the RM. These new data on G protein-coupled receptors and molecular network organization indicate possible new approaches for drug development.
26
193
208
Receptor-receptor interactions, receptor mosaics, and basic principles of molecular network organization - Possible implications for drug development / Agnati, Luigi Francesco; Tarakanov, A. O.; S., Ferre; K., Fuxe; D., Guidolin. - In: JOURNAL OF MOLECULAR NEUROSCIENCE. - ISSN 0895-8696. - STAMPA. - 26(2005), pp. 193-208.
Agnati, Luigi Francesco; Tarakanov, A. O.; S., Ferre; K., Fuxe; D., Guidolin
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/306020
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