|Title||Disturbance rejection helps modulate the P53 oscillation|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||Shin, YJ, SM Lipkin, B Hencey, and X Shen|
|Journal||ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, DSCC 2011|
|Pagination||557 - 563|
Designing a system that adequately processes the input and that rejects the effects of disturbance is a central theme in feedback control theory. In this paper, we use the concept of "disturbance rejection" to analyze the oscillatory behavior of p53, a well-known tumor suppressor protein. Our analysis reveals that the p53 oscillation is not completely dictated by the p53-MDM2 negative feedback loopit is also modulated by periodic DNA repair-related fluctuations. According to our disturbance rejection model, the feedback loop normally filters the effects of noise and fluctuations on p53, but upon DNA damage, it stops performing the filtering function so that DNA repair-related fluctuations can modulate the p53 oscillation. Our analysis suggests that the overexpression of MDM2, observed in many types of cancer, can make the feedback mechanism less responsive to the modulating signals after DNA damage occurs. Copyright © 2011 by ASME.
|Short Title||ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, DSCC 2011|