Therefore, regulation of post - transcriptional processing may be a preferred mechanism, instead of transcription control in case of miRNAs present in clusters.
Thus, hormonal regulation of microRNAs can occur both directly by binding to the promoter elements of microRNAs or indirectly via regulation of post transcriptional processing proteins.
In dairy cows, insulin and tissue sensitivity to insulin, which can be studied using an intravenous glucose infusion method, known as the glucose tolerance test (GTT), play a key role in the regulation of post partum nutrient partitioning and lipid mobilization [ 6].
They are thought to regulate up to one-third of the human genome via sequence-specific regulation of post-transcriptional gene expression by targeting mRNAs for cleavage or translational repression [ 5]. miRNAs have recently been identified as key players in cellular processes including self-renewal, differentiation, growth and death [ 6], all of which are dysregulated in carcinogenesis.
OsMir393a is expressed in the initiation sites of crown and lateral roots, suggesting that OsMir393a is involved in the regulation of post-embryonic root formation via a negative regulation of the rice auxin receptors.
Previous studies demonstrated the important role of NMDAR activity in the regulation of post-synaptic density scaffold proteins, including PSD95 [33] and Homer1b [34].
There was no effect on PPF (Fig. 6A; F13,6 = 1.3, p<0.3) following stimulation with NMDA (100 µM), suggesting that the acute synaptic depression was due to regulation of post-synaptic processes, and not due to pre-synaptic ones.
Interestingly, RASSF9 mRNA expression in heart and lung increased with growth from one to two weeks old, implicating a role of this gene in regulation of post-partum maturation of these organs in addition to epidermis development.
Recently, it was hypothesized that this may, in part, be a fundamental aspect contributing to the dynamic regulation of post-synaptic density (PSD) signaling complexes, since the presence of multiple 'slots' prevents disengaged receptors from outward diffusion, whereas a more densely packed PSD would be less mobile [34].
Dissecting out the mechanism responsible for the disconnect between mRNA and protein, which likely involves regulation of post-translational processes and/or IL-8 secretion, will be an important step in understanding the mechanisms of action of the immunomodulatory effects of macrolide therapy.
This also may have implications for the differential regulation of post-translationally modified p53 and p73.
