Structure-activity relationship and biological property of cortistatins, anti-angiogenic spongean steroidal alkaloids.

Abstract:

:Previously, bioassay-guided separation led us to isolate eleven novel steroidal alkaloids named cortistatins from the marine sponge Corticium simplex. These cortistatins were classified into three types based on the chemical structure of the side chain part, that is, isoquinoline, N-methyl piperidine or 3-methylpyridine units. From the structure-activity relationship study, the isoquinoline unit in the side chain was found to be crucial for the anti-angiogenic activity of cortistatins. Cortistatin A (1) showed cytostatic growth-inhibitory activity against human umbilical vein endothelial cells (HUVECs). Cortistatin A (1) also inhibited VEGF-induced migration of HUVECs and bFGF-induced tubular formation. Although cortistatin A (1) showed no effect on VEGF-induced phosphorylation of ERK1/2 and p38, which are one of the signaling pathways for migration and tubular formation, the phosphorylation of the unidentified 110kDa protein in HUVECs was inhibited by the treatment with cortistatin A.

journal_name

Bioorg Med Chem

authors

Aoki S,Watanabe Y,Tanabe D,Arai M,Suna H,Miyamoto K,Tsujibo H,Tsujikawa K,Yamamoto H,Kobayashi M

doi

10.1016/j.bmc.2007.08.017

subject

Has Abstract

pub_date

2007-11-01 00:00:00

pages

6758-62

issue

21

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(07)00691-8

journal_volume

15

pub_type

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