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Myoferlin gene silencing decreases Tie-2 expression in vitro and angiogenesis in vivo.

Abstract：

:Angiogenesis consists in the growth of new blood vessels from pre-existing ones. Although anti-angiogenesis interventions have been shown to have therapeutic properties in human diseases such as cancer, their effect is only partial and the identification of novel modulators of angiogenesis is warranted. Recently, we reported the unexpected proteomic identification in endothelial cells (EC) of Myoferlin, a member of the Ferlin family of transmembrane proteins. Ferlins are well known to regulate the fusion of lipid vesicles at the plasma membrane in muscle cells, and we showed that Myoferlin gene knockdown not only decreases lipid vesicle fusion in EC but also attenuates Vascular Endothelial Growth Factor (VEGF) Receptor-2 (VEGFR-2) expression. Herein, we show that Myoferlin gene silencing in cultured EC also results in attenuated expression of a second tyrosine kinase receptor, Tie-2, which is another well-described angiogenic receptor. Most importantly, we provide evidence that delivery of a low-volume Myoferlin siRNA preparation in mouse tissues results in attenuated angiogenesis and edema formation. This provides the first evidence that acute Myoferlin knockdown has anti-angiogenic effects and validates Myoferlin as an anti-angiogenesis target. Furthermore, this supports the unexpected but increasingly accepted concept that proper tyrosine kinase receptors expression at the plasma membrane requires Myoferlin.

journal_name

Vascul Pharmacol

journal_title

Vascular pharmacology

authors

Yu C,Sharma A,Trane A,Utokaparch S,Leung C,Bernatchez P

doi

10.1016/j.vph.2011.04.001

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

26-33

issue

1-3

eissn

1537-1891

issn

1879-3649

pii

S1537-1891(11)00033-4

journal_volume

55

pub_type

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