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Changes in gene expression in atherosclerotic plaques analyzed using DNA array.

Mikko O Hiltunen1, Tiina T Tuomisto, Mari Niemi

  • 1Department of Molecular Medicine, A.I. Virtanen Institute, University of Kuopio, P.O. Box 1627, Fin-70211 Kuopio, Finland.

Atherosclerosis
|September 5, 2002
PubMed
Summary

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DNA array technology rapidly screens gene expression in atherosclerotic lesions. This identifies novel genes like Janus kinase 1 (JAK-1) and VEGF receptor-2, crucial for understanding and treating vascular diseases.

Area of Science:

  • Cardiovascular Biology
  • Molecular Biology
  • Genomics

Background:

  • Atherogenesis, the development of arterial plaques, requires a deeper understanding of gene expression.
  • Identifying novel therapeutic targets for vascular diseases depends on this understanding.

Purpose of the Study:

  • To utilize DNA array technology for analyzing gene expression in atherosclerotic lesions.
  • To identify novel genes implicated in the pathogenesis of atherosclerosis.

Main Methods:

  • Gene expression profiling of normal arteries and human advanced atherosclerotic lesions using a 18,376 cDNA fragment array.
  • Validation of array results using in situ hybridization and RT-PCR for selected genes.
  • Immunohistological characterization of atherosclerotic lesions.

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Main Results:

  • The array method successfully identified known atherogenesis-related genes (e.g., Apolipoprotein E, CD68).
  • 75 differentially expressed genes not previously linked to atherogenesis were discovered.
  • Confirmed induction of Janus kinase 1 (JAK-1) and VEGF receptor-2 in advanced lesions.

Conclusions:

  • DNA array technology is effective for rapid gene expression screening in small atherosclerotic tissue samples.
  • JAK-1 and VEGF receptor-2 are identified as potentially significant factors in atherogenesis.
  • This approach facilitates the discovery of new therapeutic targets for vascular diseases.