Maslinic acid (2 alpha,3 beta-dihydroxyolean-12-en-28-oic acid), a natural dihydroxylated pentacyclic triterpene acid isolated from olive-pressing residues, has been investigated together with some of its derivatives regarding the induction of apoptosis in B16F10 melanoma cells. Some of the compounds tested are described in this work, but others come from previous studies. Ten of these derivatives induce over 80% of apoptosis, clearly promoting cell death in B16F10 melanoma. By contrast, the induction cell death through necrosis was very slightly significant with these compounds. These results indicate that maslinic acid derivatives are promising chemopreventive and chemotherapeutic agents. (C) 2011 Elsevier Masson SAS. All rights reserved.
The present invention provides an early insulin secretion stimulator consisting of a triterpene represented by the following general formula (1) and/or a triterpene represented by the following general formula (2).
[where R1 represents COOH, etc., R11 and R12 represent CH2OH, etc., X1 represents hydrogen or OH and X11, X12, X21 and X22 represent OH, etc.]
Polynucleotide binding complexes comprising sterols and saponin
申请人:Nordic Vaccine Technology A/S
公开号:EP2011517A1
公开(公告)日:2009-01-07
The present invention pertains to complexes comprising sterols and saponins. The complexes are capable of binding a genetic determinant including a polynucleotide. The complexes may further comprise a lipophilic moiety, optionally a lipophilic moiety comprising a contacting group and/or a targeting ligand, and/or a saccharide moiety. The complexes may further comprise an immunogenic determinant and/or an antigenic determinant and/or a medicament and/or a diagnostic compound. The complexes may in even further embodiments be encapsulated by an encapsulation agent including a biodegradable microsphere. The present invention also pertains to pharmaceutical compositions and methods of treatment of an individual by therapy and/or surgery, methods of cosmetic treatment, and diagnostic methods practised on the human or animal body.
Different pathways for the deoxygenation of the A-ring of natural triterpene compounds
作者:Andres Parra、Pilar E. Lopez、Andres Garcia-Granados
DOI:10.1080/14786410903172098
日期:2010.1.20
Some deoxygenation pathways were tested to remove the hydroxyl groups of the natural triterpenes oleanolic acid and maslinic acid to obtain a practical starting material for the semisynthesis of other interesting organic synthons. Different deoxygenation processes were carried out starting from these triterpenic acids or from several derivatives such as methyl esters and epoxy derivatives. The hydroxyl groups were transformed into some intermediate compounds including xanthyl, thiocarbonyl or tosyl derivatives. The opening of the oxirane ring between C-2 and C-3 was also achieved through different methods using deoxygenating reagents such as Me3SiCl/NaI, WCl4/n-BuLi and Cp2TiCl.
POLYNUCLEOTIDE BINDING COMPLEXES COMPRISING STEROLS AND SAPONINS
申请人:Nordic Vaccine Technology A/S
公开号:EP1377320B1
公开(公告)日:2008-10-01
Insulin secretion potentiator
申请人:Matsuyama Futoshi
公开号:US20050143464A1
公开(公告)日:2005-06-30
The present invention provides early insulin secretion stimulators consisting of triterpenes represented by the following general formula (1) and/or triterpenes represented by the following general formula (2).
[where R
1
represents COOH, etc., R
11
and R
12
represent CH
2
OH, etc., X
1
represents hydrogen or OH and X
11
, X
12
, X
21
and X
22
represent OH, etc.]