A protein interaction network for the analysis of the neuronal differentiation of neural stem cells in response to titanium dioxide nanoparticles.
The effects of titanium dioxide (TiO(2)) nanoparticles (NPs) on the differentiation of neural stem cells are reported. Our findings indicate that TiO(2) NPs lead to a differentiational tendency towards neurons from neural stem cells, suggesting TiO(2) NPs might be a beneficial inducer for neuronal differentiation. To insight into the possible molecular mechanism of the neuronal differentiation, we conducted a protein-protein interaction network (PIN) analysis. To this end, a global mapping of target proteins induced by TiO(2) NPs was first made by a 2-dimensional electrophoresis analysis. Results showed that 9 proteins were significantly changed and then they were subjected to the mass spectrometric assay. All 9 identified proteins are involved in signal, molecular chaperones, cytoskeleton, and nucleoprotein. Further, based on our experimental data and DIP, IntAct-EBI, GRID database, a protein-protein interaction network was constructed, which provides highly integrated information exhibiting the protein-protein interaction. By analysis of the gene expression, the signal pathway involving Cx43 phosphorylation, which is negatively regulated by the protein kinase C epsilon (PKCepsilon), is demonstrated. It is inferred that PKCepsilon plays a pivotal negative role in the neuronal differentiation of stem neural cells in response to the TiO(2) NPs exposure.
Liu
Xiaoyan
X
Laboratory of Molecular Neurobiology, School of Life Sciences, Shanghai University, Shanghai, PR China.
Ren
Xiufang
X
Deng
Xiaoyong
X
Huo
Yinan
Y
Xie
Jiang
J
Huang
Hai
H
Jiao
Zheng
Z
Wu
Minghong
M
Liu
Yuanfang
Y
Wen
Tieqiao
T
D000818:Animals; D001253:Astrocytes / Q000166:cytology / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D018031:Connexin 43 / Q000235:genetics / Q000378:metabolism; D020869:Gene Expression Profiling; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D039902:Multipotent Stem Cells / Q000166:cytology / Q000187:drug effects / Q000502:physiology; D053758:Nanoparticles / Q000737:chemistry*; D009474:Neurons / Q000166:cytology / Q000187:drug effects* / Q000502:physiology; D025941:Protein Interaction Mapping / Q000379:methods; D020543:Proteome / Q000032:analysis; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology*
D018031:Connexin 43; D020543:Proteome; C009495:titanium dioxide; D014025:Titanium