13 research outputs found
Enhancing apoptosis in TRAIL-resistant cancer cells using fundamental response rules
The tumor necrosis factor related apoptosis-inducing ligand (TRAIL) induces apoptosis
in malignant cells, while leaving other cells mostly unharmed. However, several
carcinomas remain resistant to TRAIL. To investigate the resistance mechanisms in
TRAIL-stimulated human fibrosarcoma (HT1080) cells, we developed a computational
model to analyze the temporal activation profiles of cell survival (IκB, JNK, p38)
and apoptotic (caspase-8 and -3) molecules in wildtype and several (FADD, RIP1,
TRAF2 and caspase-8) knock-down conditions. Based on perturbation-response approach
utilizing the law of information (signaling flux) conservation, we derived response
rules for population-level average cell response. From this approach, i) a
FADD-independent pathway to activate p38 and JNK, ii) a crosstalk between RIP1 and
p38, and iii) a crosstalk between p62 and JNK are predicted. Notably, subsequent
simulations suggest that targeting a novel molecule at p62/sequestosome-1 junction
will optimize apoptosis through signaling flux redistribution. This study
offers a valuable prospective to sensitive TRAIL-based therapy
Using Microfluidics to Investigate Hematopoietic Stem Cell and Microniche Interactions at the Single Cell Level
Real-Time Cellular Exometabolome Analysis with a Microfluidic-Mass Spectrometry Platform
An on-chip imaging droplet-sorting system: a real-time shape recognition method to screen target cells in droplets with single cell resolution
High-throughput analysis of single hematopoietic stem cell proliferation in microfluidic cell culture arrays
High-throughput microfluidic single-cell analysis pipeline for studies of signaling dynamics
Functional proteomics to dissect tyrosine kinase signalling pathways in cancer
Advances in the generation and interpretation of proteomics data have spurred a transition from focusing on protein identification to functional analysis. Here we review recent proteomics results that have elucidated new aspects of the roles and regulation of signal transduction pathways in cancer using the epidermal growth factor receptor (EGFR), ERK and breakpoint cluster region (BCR)-ABL1 networks as examples. The emerging theme is to understand cancer signalling as networks of multiprotein machines which process information in a highly dynamic environment that is shaped by changing protein interactions and post-translational modifications (PTMs). Cancerous genetic mutations derange these protein networks in complex ways that are tractable by proteomics