PMID- 10331420 OWN - NLM STAT- MEDLINE DCOM- 19990527 LR - 20220331 IS - 0012-1797 (Print) IS - 0012-1797 (Linking) VI - 48 IP - 5 DP - 1999 May TI - Vascular endothelial growth factor activates nuclear factor-kappaB and induces monocyte chemoattractant protein-1 in bovine retinal endothelial cells. PG - 1131-7 AB - Vascular endothelial growth factor (VEGF) has been suggested to play a role in the pathogenesis of diabetic vascular complications. In the present study, we investigated whether expression of monocyte chemoattractant protein-1 (MCP-1), a chemokine that has been proposed to recruit leukocytes to sites of inflammation, neovascularization, and vascular injury, can be modulated by VEGF in bovine retinal microvascular endothelial cells (BRECs). VEGF induced expression of MCP-1 mRNA in BRECs in a concentration- and time-dependent manner. Secretion of MCP-1 into the culture medium of BRECs treated with VEGF for 24 h was increased by 2.2-fold compared with the control. Inhibitors of transcription factor NF-kappaB, N-alpha-tosyl-L-lysine chloromethylketone (TLCK) and N-acetylcysteine (NAC), as well as an inhibitor of the extracellular signal-regulated kinase (ERK) pathway, PD 98059, attenuated VEGF-induced expression of MCP-1 mRNA. Using electrophoretic gel mobility shift assay, we observed that VEGF stimulated binding activity of NF-kappaB. VEGF-induced NF-kappaB activation was inhibited by TLCK and NAC, but not by PD 98059. Binding activity of transcription factor AP-1, which is suggested to regulate induction of the MCP-1 gene together with NF-kappaB, was also stimulated by VEGF. PD 98059 inhibited the VEGF-induced activation of AP-1. These results indicate that VEGF induces MCP-1 expression in BRECs most likely by activating NF-kappaB and AP-1 via ERK-independent and -dependent pathways. Activation of NF-kappaB and induction of MCP-1 by VEGF in microvascular endothelial cells may contribute to the development of diabetic vascular complications. FAU - Marumo, T AU - Marumo T AD - Institut fur Kardiovaskulare Physiologie, Klinikum der Johann Wolfgang Goethe Universitat, Frankfurt am Main, Germany. r.busse@em.uni-frankfurt.de FAU - Schini-Kerth, V B AU - Schini-Kerth VB FAU - Busse, R AU - Busse R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Diabetes JT - Diabetes JID - 0372763 RN - 0 (Chemokine CCL2) RN - 0 (Endothelial Growth Factors) RN - 0 (Lymphokines) RN - 0 (NF-kappa B) RN - 0 (RNA, Messenger) RN - 0 (Transcription Factor AP-1) RN - 0 (Vascular Endothelial Growth Factor A) RN - 0 (Vascular Endothelial Growth Factors) RN - 2104-86-1 (Tosyllysine Chloromethyl Ketone) RN - WYQ7N0BPYC (Acetylcysteine) SB - IM MH - Acetylcysteine/pharmacology MH - Animals MH - Cattle MH - Chemokine CCL2/*biosynthesis/genetics MH - Endothelial Growth Factors/*pharmacology MH - Endothelium, Vascular/*metabolism MH - Gene Expression MH - Kinetics MH - Lymphokines/*pharmacology MH - Microcirculation/metabolism MH - NF-kappa B/antagonists & inhibitors/*metabolism MH - RNA, Messenger/metabolism MH - Retinal Vessels/*metabolism MH - Tosyllysine Chloromethyl Ketone/pharmacology MH - Transcription Factor AP-1/metabolism MH - Vascular Endothelial Growth Factor A MH - Vascular Endothelial Growth Factors EDAT- 1999/05/20 00:00 MHDA- 1999/05/20 00:01 CRDT- 1999/05/20 00:00 PHST- 1999/05/20 00:00 [pubmed] PHST- 1999/05/20 00:01 [medline] PHST- 1999/05/20 00:00 [entrez] AID - 10.2337/diabetes.48.5.1131 [doi] PST - ppublish SO - Diabetes. 1999 May;48(5):1131-7. doi: 10.2337/diabetes.48.5.1131.