Please use this identifier to cite or link to this item: https://doi.org/bioinformatics/bts702
Title: Computational modelling of LY303511 and TRAIL-induced apoptosis suggests dynamic regulation of cFLIP
Authors: Shi, Y.
Mellier, G.
Huang, S.
White, J.
Pervaiz, S.
Tucker-Kellogg, L. 
Issue Date: 1-Feb-2013
Source: Shi, Y., Mellier, G., Huang, S., White, J., Pervaiz, S., Tucker-Kellogg, L. (2013-02-01). Computational modelling of LY303511 and TRAIL-induced apoptosis suggests dynamic regulation of cFLIP. Bioinformatics 29 (3) : 347-354. ScholarBank@NUS Repository. https://doi.org/bioinformatics/bts702
Abstract: Motivation: TRAIL has been widely studied for the ability to kill cancer cells selectively, but its clinical usefulness has been hindered by the development of resistance. Multiple compounds have been identified that sensitize cancer cells to TRAIL-induced apoptosis. The drug LY303511 (LY30), combined with TRAIL, caused synergistic (greater than additive) killing of multiple cancer cell lines. We used mathematical modelling and ordinary differential equations to represent how LY30 and TRAIL individually affect HeLa cells, and to predict how the combined treatment achieves synergy.Results: Model-based predictions were compared with in vitro experiments. The combination treatment model was successful at mimicking the synergistic levels of cell death caused by LY30 and TRAIL combined. However, there were significant failures of the model to mimic upstream activation at early time points, particularly the slope of caspase-8 activation. This flaw in the model led us to perform additional measurements of early caspase-8 activation. Surprisingly, caspase-8 exhibited a transient decrease in activity after LY30 treatment, prior to strong activation. cFLIP, an inhibitor of caspase-8 activation, was up-regulated briefly after 30 min of LY30 treatment, followed by a significant down-regulation over prolonged exposure. A further model suggested that LY30-induced fluctuation of cFLIP might result from tilting the ratio of two key species of reactive oxygen species (ROS), superoxide and hydrogen peroxide. Computational modelling extracted novel biological implications from measured dynamics, identified time intervals with unexplained effects, and clarified the non-monotonic effects of the drug LY30 on cFLIP during cancer cell apoptosis.Supplementary information: Supplementary data are available at Bioinformatics online. © 2012 The Author.
Source Title: Bioinformatics
URI: http://scholarbank.nus.edu.sg/handle/10635/113124
ISSN: 13674803
DOI: bioinformatics/bts702
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

WEB OF SCIENCETM
Citations

3
checked on Jan 24, 2018

Page view(s)

52
checked on Feb 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.