Dynamics of miRNA driven feed-forward loop depends upon miRNA action mechanisms.

ABSTRACT:

Background

We perform the theoretical analysis of a gene network sub-system, composed of a feed-forward loop, in which the upstream transcription factor regulates the target gene via two parallel pathways: directly, and via interaction with miRNA.

Results

As the molecular mechanisms of miRNA action are not clear so far, we elaborate three mathematical models, in which miRNA either represses translation of its target or promotes target mRNA degradation, or is not re-used, but degrades along with target mRNA. We examine the feed-forward loop dynamics quantitatively at the whole time interval of cell cycle. We rigorously proof the uniqueness of solutions to the models and obtain the exact solutions in one of them analytically.

Conclusions

We have shown that different mec

SUBMITTER: Duk MA 

PROVIDER: S-EPMC4303955 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature