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Related Experiment Videos

Expression of complement messenger RNAs by human endothelial cells.

A Klegeris1, C J Bissonnette, K Dorovini-Zis

  • 1Kinsmen Laboratory of Neurological Research, University of British Columbia, 2255 Wesbrook Mall, V6T 1Z3, Vancouver, BC, Canada.

Brain Research
|July 7, 2000
PubMed
Summary

Endothelial cells, including those in the brain, express complement gene mRNAs. This suggests endothelial cells may produce complement proteins in various organs.

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Area of Science:

  • Immunology
  • Cell Biology
  • Neuroscience

Background:

  • The complement system is crucial for innate and adaptive immunity.
  • Endothelial cells play a role in immune responses and vascular integrity.
  • Understanding complement expression in endothelial cells is vital for studying inflammatory and immune processes in organs.

Purpose of the Study:

  • To investigate complement mRNA expression in different types of human endothelial cells.
  • To determine if brain microvessel endothelial cells (HBMEC) express complement genes.
  • To compare complement gene expression patterns between HBMEC, human umbilical vein endothelial cells (HUVEC), and ECV304 cells.

Main Methods:

  • Quantitative analysis of complement mRNA expression.
  • Utilized human brain microvessel endothelial cells (HBMEC), human umbilical vein endothelial cells (HUVEC), and ECV304 cell lines.

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  • Detected specific complement gene mRNAs including C1q, C1r, C1s, C2, C3, C4, C5, C6, C7, C8, and C9.

    • Main Results:

    • HBMEC and HUVEC expressed detectable levels of mRNAs for multiple complement genes (C1q B-chain, C1r, C1s, C2, C3, C4, C5, C7, C8 gamma-subunit, C9).
    • ECV304 cells showed a different expression profile, lacking C1q and C9 mRNA, and also C6 mRNA.
    • Significant differences in complement gene expression were observed between the cell types.

    Conclusions:

    • Endothelial cells, particularly those in the brain, are a potential source of complement proteins.
    • These findings suggest a role for endothelial cells in local complement production within organs.
    • Further research is warranted to explore the functional implications of endothelial complement expression in health and disease.