Detection of characteristic sub pathway network for angiogenesis based on the comprehensive pathway network

Area of Science:

• Systems Biology
• Cellular Biology
• Bioinformatics

Background:

• Biological pathways cooperate to determine cell properties and phenotype.
• Changes in pathway interactions are critical for understanding cell function and phenotypic plasticity.

Purpose of the Study:

• To construct a comprehensive pathway network.
• To develop a novel concept, characteristic subpathway network (CSPN), for analyzing phenotype-specific pathway interactions.
• To investigate dynamic and static CSPNs related to angiogenesis in human umbilical vein endothelial cells (HUVECs) upon stimulation.

Main Methods:

• Constructed a pathway network by counting protein-protein interactions (PPIs) between gene sets of defined pathways.
• Developed phenotype-specific CSPNs by incorporating gene expression data and identifying active PPIs.
• Analyzed static and dynamic CSPNs using angiogenesis data from HUVECs stimulated with interleukin-1 (IL-1) and tumor necrosis factor alpha (TNF-alpha).

Main Results:

• A comprehensive pathway network with 37 pathways and 263 interactions was generated.
• Two phenotype-specific CSPNs for angiogenesis were identified in HUVECs.
• A static CSPN (involving B cell receptor, T cell receptor, Toll-like receptor, MAPK, VEGF, ErbB pathways) and a dynamic CSPN (involving TGF-beta, Wnt, p53, cell cycle pathways) were detected.

Conclusions:

• The comprehensive pathway network aids in understanding pathway cooperation.
• Static and dynamic CSPNs provide insights into HUVEC function and phenotypic plasticity during angiogenesis.
• This approach deepens the understanding of cellular responses to stimuli.