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Isolation of Human Umbilical Vein Endothelial Cells and Their Use in the Study of Neutrophil Transmigration Under Flow Conditions
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Cardiotrophin-1 induces monocyte chemoattractant protein-1 synthesis in human umbilical vein endothelial cells

Michael Fritzenwanger1, Friedhelm Kuethe, Daniela Haase

  • 1Department of Internal Medicine I, Division of Cardiology, Friedrich-Schiller-University Jena, Erlanger Allee 101, 07740 Jena, Germany. michael.fritzenwanger@med.uni-jena.de

Cytokine
|January 24, 2006
PubMed

Insights

Cardiotrophin-1 (CT-1) induces monocyte chemoattractant protein-1 (MCP-1) in endothelial cells, a key pathway in chronic heart failure (CHF). This involves STAT3, JAK2, and NF-kappaB signaling, potentially driving disease progression.

Area of Science:

  • Cardiovascular Biology
  • Molecular Medicine
  • Cytokine Signaling

Background:

  • Elevated cardiotrophin-1 (CT-1) and monocyte chemoattractant protein-1 (MCP-1) are observed in chronic heart failure (CHF).
  • CT-1, a cytokine in the IL-6 superfamily, is implicated in cardiovascular disease, but its direct effect on endothelial cells is unclear.
  • MCP-1 serves as a marker for endothelial activation, suggesting a link between CT-1 and endothelial dysfunction in CHF.

Purpose of the Study:

  • To investigate whether CT-1 induces MCP-1 production in human umbilical vein endothelial cells (HUVEC).
  • To elucidate the signaling pathways involved in CT-1-mediated MCP-1 induction.
  • To understand the potential role of CT-1 in the pathogenesis of CHF.

Main Methods:

  • Quantification of MCP-1 mRNA using real-time PCR, RT-PCR, and northern blot.
  • Measurement of MCP-1 protein in supernatant via ELISA.
  • Western blot analysis to assess Signal Transducer and Activator of Transcription 3 (STAT3) and phosphorylated STAT3 (pSTAT3).
  • Inhibition studies using specific blockers for STAT3 phosphorylation (Piceatannol), JAK2 pathway (AG490), and NF-kappaB (Parthenolide).

Main Results:

  • CT-1 induced a time- and concentration-dependent increase in MCP-1 mRNA and protein in HUVEC.
  • Maximal MCP-1 mRNA levels were observed after 6 hours, with significant protein induction after 24 hours.
  • CT-1 triggered STAT3 phosphorylation, which was inhibited by Piceatannol.
  • AG490 and Parthenolide also inhibited CT-1-induced MCP-1 upregulation, indicating the involvement of JAK2 and NF-kappaB pathways.

Conclusions:

  • CT-1 stimulates MCP-1 production in HUVEC through STAT3 phosphorylation, JAK2 activation, and NF-kappaB signaling.
  • This CT-1-induced MCP-1 pathway may contribute to the progression of CHF by recruiting inflammatory cells or directly affecting myocyte function.

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