Abstract:
:Vasohibin is a newly identified negative feedback regulator for angiogenesis. When expressed in cultured human endothelial cells, vasohibin polypeptides were detected in multiple distinct molecular weight forms, suggesting that some proteolytic events may occur within cells or the pericellular milieu. In order to identify the proteolysis sites, vasohibin cDNA mutants were generated to substitute some basic amino acids with alanine and then were transfected into endothelial cells. Western blots with anti-vasohibin monoclonal antibody following the transfection showed that there were at least two cleaving sites in the amino terminal region. Purified recombinant protein of the amino terminal truncated forms not only retained its inhibitory activity on angiogenesis in mouse corneal assay but also showed strong affinity to heparin. Moreover, deletion of some basic residues at the carboxyl terminal resulted in abrogation of both antiangiogenic and heparin-binding activities. Processing patterns and biological activities of the processed forms of this novel antiangiogenic factor are discussed.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sonoda H,Ohta H,Watanabe K,Yamashita H,Kimura H,Sato Ydoi
10.1016/j.bbrc.2006.01.185subject
Has Abstractpub_date
2006-04-07 00:00:00pages
640-6issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(06)00167-7journal_volume
342pub_type
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