To minimize the possibility of selection of the undesired expression-improved mutants, the expression level of wildtype Rubisco was firstly maximized in E. coli through overexpressing the Rubisco-specific molecular chaperone and optimizing the expression conditions.
Ribozymes, antisense RNAs (asRNAs), RNA decoys, aptamers and spiegelmers, microRNAs (miRNAs), and small interfering (siRNAs) have been used to down-regulate undesired gene expression.
The Gaussian model-based DSPP is very sensitive to non-stationarity of the undesired signal, as the expression (15) requires an estimate of the PSD matrix Φ u.
However, this phenotype was still connected with the regulation of YAP by MST1/2 signalling, since loss of MST1/2 resulted in a smaller pancreas due to postnatal reactivation of YAP expression, triggering undesired postnatal de-differentiation of pancreatic cells[54, 55].
However, a single miRNA will probably target unrelated genes and possibly produce undesired changes in gene expression.
Being identified as differentially expressed does not equate to having low expression in the undesired tissues, but inspection of the FDR 0.001 group shows the majority of genes having very low expression in larvae, pupae, male, and 24-hr PBM carcass samples, with 90% of genes having an RPKM value of less than 11 and 74% with less than 5 RPKM (see File S1).
Now the question is whether we can use potentially therapeutic interventions to change gene or protein expressions from undesired states to desired states.
To do this, we combined systematic design rules, biophysical models, and computational optimization to design synthetic bacterial operons expressing the 5-enzyme pathway, while eliminating undesired genetic elements for maximum expression control.
Activation of TMEM16A with pharmacological agents could circumvent the primary defect in CF. This strategy needs to be carefully designed and tested to avoid possible undesired effects due to the expression of TMEM16A in other cell types such as bronchial smooth muscle cells.
In fact, it might be harmful because the net effect would be an increase in expression of the undesired gene.
Due to early death of mutant mice, the gene therapy treatment of pups was combined with phototherapy during the first week of life to avoid undesired brain damage before full expression of the therapeutic gene.
