Gene interactions and pathways from curated databases and text-mining
International journal of molecular sciences 2013, PMID: 23665907

Vascular Endothelial Growth Factor Induces CXCL1 Chemokine Release via JNK and PI-3K-Dependent Pathways in Human Lung Carcinoma Epithelial Cells.

Lo, Huey-Ming; Shieh, Jiunn-Min; Chen, Chih-Li; Tsou, Chih-Jen; Wu, Wen-Bin

Lung cancer cells express different chemokines and chemokine receptors that modulate leukocyte infiltration within tumor microenvironment. In this study we screened several mediators/growth factors on CXCL1 release in human carcinoma epithelial cells. Of the tested mediators, VEGF was found to have a robust increase in causing CXCL1 release. VEGF stimulated CXCL1 release and mRNA expression in a time- and concentration-dependent manner. The release was inhibited by the VEGF receptor antagonists and the JNK, PI-3K, tyrosine kinase, and transcription inhibitors. In parallel, VEGF induced JNK, PI3K and Akt activation. Strikingly, among these inhibitors only the JNK inhibitor could reduce VEGF-induced CXCL1 mRNA expression, suggesting that JNK participated in VEGF-induced CXCL1 synthesis, whereas PI-3K was responsible for cellular CXCL1 secretory process. In addition, the steroid dexamethasone and TGF-β suppressed CXCL1 release through a transcriptional regulation. We also showed that cells stimulated with VEGF significantly attracted monocyte migration, which could be abolished by CXCL1 B/N Ab, CXC receptor 2 antagonist, TGF-β, and dexamethasone. In summary, we provide here evidence showing JNK activation for VEGF-induced CXCL1 DNA transcription and PI-3K pathway for extracellular CXCL1 release in human carcinoma epithelial cells. The released CXCL1 was functionally linked to recruiting monocytes into lung cancer cell microenvironment.

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Text Mining Data

CXCL1 → VEGF: " VEGF stimulated CXCL1 release and mRNA expression in a time- and concentration dependent manner "

VEGF → Akt: " In parallel, VEGF induced JNK, PI3K and Akt activation "

VEGF → PI3K: " In parallel, VEGF induced JNK, PI3K and Akt activation "

VEGF → PI3K: " In parallel, VEGF induced JNK, PI3K and Akt activation "

CXCL1 → VEGF: " Strikingly, among these inhibitors only the JNK inhibitor could reduce VEGF induced CXCL1 mRNA expression, suggesting that JNK participated in VEGF induced CXCL1 synthesis, whereas PI-3K was responsible for cellular CXCL1 secretory process "

CXCL1 → VEGF: " In summary, we provide here evidence showing JNK activation for VEGF induced CXCL1 DNA transcription and PI-3K pathway for extracellular CXCL1 release in human carcinoma epithelial cells "

Manually curated Databases

No curated data.