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Endothelium
Journal of Endothelial Cell Research
Volume 11, 2004 - Issue 5-6
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Research Article

Possible Participation of pICln in the Regulation of Angiogenesis Through Alternative Splicing of Vascular Endothelial Growth Factor Receptor mRNAs

, , , , , , , & show all
Pages 293-300 | Published online: 13 Jul 2009
 

Abstract

In this study, the authors applied a modified Antisense Display method to human vascular endothelial cells (ECs) in culture to isolate new angiostatic genes. Screening of a 10mer antisense oligodeoxyribonucleotide (oligo) repertoire identified a subpool that consistently stimulated EC growth. Subsequent screening of oligos with increasing chain length led to the isolation of a unique growth-stimulatory 14mer, 5′-TTCCACATCATATT-3′. cDNA/EST data-base search and expression analyses in ECs indicated pICln as the corresponding gene. A longer unique antisense oligo against a different region of pICln mRNA was found to also enhance EC growth and tube formation and to decrease mRNAs for soluble Flt-1 and neuropilin-1 vascular endothelial growth factor (VEGF) receptors, the angiostatic factors that are generated by alternative RNA splicing. Conversely, pICln overexpression suppressed EC growth and increased the mRNAs for both soluble Flt-1 and soluble neuropilin-1. The present findings thus suggest that pICln plays a role in autocrine regulation of angiogenesis, probably through alternative splicing.

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