Human Gene Set: ASTIER_INTEGRIN_SIGNALING


Standard name ASTIER_INTEGRIN_SIGNALING
Systematic name M3590
Brief description Integrin signaling signature in precursor B leukemia (PBL) cells: fibronectin (FN1) [GeneID=2335] vs control treatment with poly-L-lysine.
Full description or abstract The physical interactions between B cells and stromal cells from the lymphoid tissue microenvironment are critical to the survival of normal and malignant B cells. They are principally mediated by integrins expressed on B cells and counterreceptors on stromal cells. Specifically, alpha4beta1 integrin engagement rescues B cells from physiological or drug-induced apoptosis. Therefore, in order to understand the mechanisms by which integrins prevent apoptosis in leukemia B cells, we compared the temporal gene expression profiles induced by beta1-integrin ligation with fibronectin (Fn) or adhesion by poly-L-Lysine in serum-starved precursor B leukemia cells. Among the 38 selected differentially expressed genes, 6 genes involved in adhesion (VAV2, EPB41L1, CORO1A), proliferation (FRAP1, CCT4), and intercellular communication (GJB3) were validated by real-time quantitative polymerase chain reaction (RT-Q-PCR). Gene expression modulation could also be validated at the protein level for 5 other genes. We show that integrin stimulation up-regulated FBI-1 expression but inhibited CD79a, Requiem, c-Fos, and caspase 7 induction when the cells underwent apoptosis. We further demonstrate that Fn stimulation also inhibits caspase 3 activation but increases XIAP and survivin expression. Moreover, integrin stimulation also prevents caspase activation induced by doxorubicin. Therefore, we identified genes modulated by adhesion of human precursor B leukemia cells that regulate proliferation and apoptosis, highlighting new pathways that might provide insights into future therapy aiming at targeting apoptosis of leukemia cells.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 12393420   Authors: Astier AL,Xu R,Svoboda M,Hinds E,Munoz O,de Beaumont R,Crean CD,Gabig T,Freedman AS
Exact source Table 1
Related gene sets  
External links
Filtered by similarity ?
Source species Homo sapiens
Contributed by Kevin Vogelsang (MSigDB Team)
Source platform or
identifier namespace		 AFFY_HG_U95
Dataset references  
Download gene set format: grp | gmt | xml | json | TSV metadata
Compute overlaps ? (show collections to investigate for overlap with this gene set)
Compendia expression profiles ? NG-CHM interactive heatmaps
(Please note that clustering takes a few seconds)
GTEx compendium
Human tissue compendium (Novartis)
Global Cancer Map (Broad Institute)
NCI-60 cell lines (National Cancer Institute)

Legacy heatmaps (PNG)
GTEx compendium
Human tissue compendium (Novartis)
Global Cancer Map (Broad Institute)
NCI-60 cell lines (National Cancer Institute)
Advanced query Further investigate these 57 genes
Gene families ? Categorize these 57 genes by gene family
Show members (show 64 source identifiers mapped to 57 genes)
Version history 3.0: Renamed from ASTIER_FN_DIFF

See MSigDB license terms here. Please note that certain gene sets have special access terms.