Format

Send to

Choose Destination
See comment in PubMed Commons below
PLoS One. 2009 Oct 21;4(10):e7189. doi: 10.1371/journal.pone.0007189.

Cross-talk between signaling pathways can generate robust oscillations in calcium and cAMP.

Author information

1
Gene Network Sciences, Cambridge, Massachusetts, United States of America.

Abstract

BACKGROUND:

To control and manipulate cellular signaling, we need to understand cellular strategies for information transfer, integration, and decision-making. A key feature of signal transduction is the generation of only a few intracellular messengers by many extracellular stimuli.

METHODOLOGY/PRINCIPAL FINDINGS:

Here we model molecular cross-talk between two classic second messengers, cyclic AMP (cAMP) and calcium, and show that the dynamical complexity of the response of both messengers increases substantially through their interaction. In our model of a non-excitable cell, both cAMP and calcium concentrations can oscillate. If mutually inhibitory, cross-talk between the two second messengers can increase the range of agonist concentrations for which oscillations occur. If mutually activating, cross-talk decreases the oscillation range, but can generate 'bursting' oscillations of calcium and may enable better filtering of noise.

CONCLUSION:

We postulate that this increased dynamical complexity allows the cell to encode more information, particularly if both second messengers encode signals. In their native environments, it is unlikely that cells are exposed to one stimulus at a time, and cross-talk may help generate sufficiently complex responses to allow the cell to discriminate between different combinations and concentrations of extracellular agonists.

PMID:
19844582
PMCID:
PMC2760754
DOI:
10.1371/journal.pone.0007189
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Public Library of Science Icon for PubMed Central
    Loading ...
    Support Center