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 Chemjournal_title
Bioorganic & medicinal chemistryauthors
Aoki S,Watanabe Y,Tanabe D,Arai M,Suna H,Miyamoto K,Tsujibo H,Tsujikawa K,Yamamoto H,Kobayashi Mdoi
10.1016/j.bmc.2007.08.017subject
Has Abstractpub_date
2007-11-01 00:00:00pages
6758-62issue
21eissn
0968-0896issn
1464-3391pii
S0968-0896(07)00691-8journal_volume
15pub_type
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