Volume 1 • Issue 2 • 1000105
Mol Biol
ISSN: 2168-9547 MBL, an open access journal
Molecular Biology
Qi et al., Mol Biol 2012, 1:2
http://dx.doi.org/10.4172/2168-9547.1000105
Research Article Open Access
Cytosolic Iron-Sulfur Protein Assembly 1 (
CIAO1
) Downstream Activation
of Phospholipase A2 and Hormone-Mediated Signaling-Induced Cell
Death Network in Human Hepatocellular Carcinoma (HCC) by Systems-
Theoretical Analysis
Lianxiu Qi
1
, Lin Wang
1
*, Minghu Jiang
2
, Juxiang Huang
1
and Hong Lin
1
1
Biomedical Center, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, 100876, China
2
Lab of Computational Linguistics, School of Humanities and Social Sciences, Tsinghua University, Beijing, 100084, China
Abstract
We constructed the signicant high expression (fold change ≥ 2) cytosolic iron-sulfur protein assembly 1 (CIAO1)
downstream activation of phospholipase A2 and hormone-mediated signaling-induced cell death network in human
Hepato Cellular Carcinoma (HCC), compared with low expression no-tumor hepatitis/cirrhotic tissues (HBV or HCV
infection) in GEO data set, by using integration of gene regulatory activated and inhibited network inference method.
Our result showed that CIAO1 downstream activation of phospholipase A2 and hormone-mediated signaling-induced
cell death upstream network had no result, and downstream CIAO1-activated PLA2G1B, NUP62 in HCC. By integrative
analysis of biological processes simultaneous occurrence between the different CIAO1 activated downstream cell
death gene ontology (GO) network of HCC compared with CIAO1 activated downstream cell death GO network of
no-tumor hepatitis/cirrhotic tissues, and the same compared CIAO1 inhibited downstream cell death GO network of
no-tumor hepatitis/cirrhotic tissues, or the different compared CIAO1 inhibited downstream cell death GO network of
HCC, we proposed and veried that CIAO1 activated upstream network had no result; Downstream network consisted
of activation of phospholipase A2, cell death, protein kinase cascade, regulation of signal transduction, hormone-
mediated signaling, negative regulation of epidermal growth factor receptor signaling pathway, negative regulation of
MAPK (Mitogen Activated Protein Kinase) activity, negative regulation of Ras protein signal transduction in HCC, as
a result of downstream activation of phospholipase A2 and hormone-mediated signaling-induced cell death in HCC.
*Corresponding author: Lin Wang, Biomedical Center, School of Electronics
Engineering, Beijing University of Posts and Telecommunications, Beijing, 100876, China,
Tel: 0086-13240981826; Fax: 8610-62785736; E-mail: wanglin98@tsinghua.org.cn
Received March 26, 2012; Accepted April 21, 2012; Published April 27, 2012
Citation: Qi L, Wang L, Jiang M, Huang J, Lin H (2012) Cytosolic Iron-Sulfur
Protein Assembly 1 (CIAO1) Downstream Activation of Phospholipase A2
and Hormone-Mediated Signaling-Induced Cell Death Network in Human
Hepatocellular Carcinoma (HCC) by Systems-Theoretical Analysis. Mol Biol 1:105.
doi:10.4172/2168-9547.1000105
Copyright: © 2012 Qi L, et al. This is an open-access article distributed under
the terms of the Creative Commons Attribution License, which permits unrestricted
use, distribution, and reproduction in any medium, provided the original author and
source are credited.
Keywords: Cytosolic iron-sulfur protein assembly 1 (CIAO1);
Human hepatocellular carcinoma (HCC); Downstream activation of
phospholipase A2 and hormone-mediated signaling-induced cell death
network; Systems-theoretical analysis
Introduction
Cytosolic iron-sulfur protein assembly 1 (CIAO1) is our identied
signicant high expression (fold change ≥ 2) gene in human
hepatocellular carcinoma (HCC) compared with low expression no-
tumor hepatitis/cirrhotic tissues (HBV or HCV infection) from GEO
(Gene Expression Omnibus) data set GSE10140-10141(http://www.
ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE10140, http://www.ncbi.
nlm.nih.gov/geo/query/acc.cgi?acc=GSE10141) [1].
We interpreted PLA2G1B and NUP62 by using gene ontology
(GO). PLA2G1B cellular component, molecular function and
biological process are relevant to extracellular region, extracellular
space; receptor binding, calcium ion binding, hydrolase activity, bile
acid binding, cell surface binding, calcium-dependent phospholipase
A2 activity; activation of MAPK activity, neutrophil mediated
immunity, fatty acid biosynthesis, phospholipid metabolism, actin
lament organization, signal transduction, protein kinase cascade,
glucose transport, leukotriene biosynthesis, neutrophil chemotaxis,
organismal lipid catabolism, positive regulation of DNA replication,
phosphatidylcholine metabolism, positive regulation of broblast
proliferation, arachidonic acid secretion, positive regulation of protein
secretion, positive regulation of immune response, activation of NF-
kappaB transcription factor, positive regulation of calcium ion transport
into cytosol, positive regulation of specic transcription from RNA
polymerase II promoter, activation of phospholipase A2, interleukin-8
production, cellular response to insulin stimulus (GO database).
NUP62 cellular component, molecular function and biological process
are relevant to nucleus, nuclear pore, nucleolus, cytoplasm, centrosome,
nucleocytoplasmic shuttling complex, nuclear membrane; chromatin
binding, protein serine/threonine kinase activity, nucleocytoplasmic
transporter activity, protein binding, structural constituent of nuclear
pore, receptor signaling complex scaold activity, transcription
regulator activity, SH2 domain binding, ubiquitin binding, thyroid
hormone receptor binding, PTB (Phosphotyrosine-binding) domain
binding; cell surface receptor linked signal transduction, cell aging,
cell death, negative regulation of cell proliferation, hormone-mediated
signaling, regulation of signal transduction, protein transport, negative
regulation of epidermal growth factor receptor signaling pathway,
negative regulation of apoptosis, positive regulation of I-kappaB
kinase/NF-kappaB cascade, negative regulation of MAPK activity,
positive regulation of epidermal growth factor receptor signaling
pathway, positive regulation of transcription, negative regulation of
Ras protein signal transduction, mRNA transport, intracellular protein
transmembrane transport (GO database).
Study of cytosolic iron-sulfur protein assembly 1 (CIAO1) is
presented in several papers as follows: Mouse knock-out of IOP1 protein
reveals its indispensable role in mammalian cytosolic iron-sulfur
protein biogenesis [2]; Tah18 transfers electrons to Dre2 in cytosolic
iron-sulfur protein biogenesis [3]; A role for IOP1 in mammalian