From the genomic point of view, real-time analyses revealed that myoinositol negatively influenced transcript abundance of AccD gene (one of the key genes involved in lipid production pathway) due to feedback inhibition and that its positive effect must have been exerted through other genes.
Taken together, Dll1 haploinsufficiency leads to a downregulation of selected genes that could function as modulators of the Notch signaling pathway, probably due to feedback mechanisms in maintaining the fine-tuning of this signaling network.
Studies have shown that persistent activation of the mTOR/S6-kinase pathway can lead to feedback inhibition of PI3K signaling through upstream activators such the adaptor protein, insulin receptor substrate 1 (IRS-1) (41).
The rates of cholesterol biosynthesis vary over a great range as a function of cholesterol availability and, actually, it has long been known that this pathway is subjected to feedback inhibition by its end product, cholesterol [ 1].
Overactivation of signaling pathways causes signal resistance due to feedback inactivation of the signaling pathway.
DAHP synthesis is the first committed step of the shikimate pathway and is often subject to feedback inhibition or repression in other microorganisms (35).
Dihydrodipicolinate synthase (DHPS) is another important regulatory enzyme of this pathway that is extremely sensitive to feedback inhibition by lysine and is the major limiting factor for the synthesis of this amino acid.
Also, overstimulation may render cell signal resistance due to feedback block of signaling pathways.
With regards to feedback directing convergent and divergent thinking, feedback suggesting convergent pathways was more prominent across all three disciplines.
From the results of this study, it appears that it is feasible to use the reinnervated sensation as a pathway to return sensory feedback from a prosthetic device to the amputee.
Moreover, no studies had directly tested the role of the other feedback pathway to the neocortex, so its role in adaptation remained unclear.
