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Related Experiment Videos

Elucidation of stannin function using microarray analysis: implications for cell cycle control.

Brian E Reese1, Dan Krissinger, Jong K Yun

  • 1Department of Pharmacology, Penn State College of Medicine, Hershey, PA 17033, USA.

Gene Expression
|April 1, 2006
PubMed
Summary
This summary is machine-generated.

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Stannin (Snn) protein regulates tumor necrosis factor-alpha (TNF-alpha)-induced growth arrest in human umbilical vein endothelial cells (HUVECs). Snn knockdown significantly inhibits HUVEC growth, suggesting its role in TNF-alpha signaling pathways.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Signal Transduction

Background:

  • Stannin (Snn) is a conserved vertebrate protein with an unclear cellular function.
  • Tumor necrosis factor-alpha (TNF-alpha) induces Snn gene expression in human umbilical vein endothelial cells (HUVECs) via protein kinase C-epsilon (PKC-epsilon).
  • TNF-alpha stimulation in HUVECs leads to altered gene expression and cell growth inhibition.

Purpose of the Study:

  • To investigate the role of Stannin (Snn) in TNF-alpha-induced signaling and HUVEC growth arrest.
  • To identify genes regulated by Snn in response to TNF-alpha stimulation.
  • To elucidate the mechanism by which Snn influences the cell cycle.

Main Methods:

  • Gene expression analysis using microarray in TNF-alpha-stimulated HUVECs with and without Snn knockdown via siRNA.

Related Experiment Videos

  • Quantitative analysis of differentially expressed genes.
  • Cell cycle analysis using flow cytometry.

    • Main Results:

    • Snn knockdown significantly inhibited HUVEC growth following TNF-alpha treatment.
    • Microarray analysis revealed 96 differentially expressed genes between TNF-alpha-stimulated HUVECs and those with Snn knockdown.
    • Upregulation of cell cycle regulators, including interleukin-4, p29, WT1/PRKC, HRas-like suppressor, and MDM4, was observed.
    • Flow cytometry confirmed a significant increase in G1 cell cycle arrest in HUVECs with Snn knockdown.

    Conclusions:

    • Stannin (Snn) plays a functional role in regulating TNF-alpha-induced signaling pathways.
    • Snn is involved in the control of HUVEC growth arrest and cell cycle progression.
    • These findings suggest Snn as a key mediator in the cellular response to TNF-alpha.