作者:Brigitte F. Schmidt、Lidia Hernandez、Carol Rouzer、Grzegorz Czerwinski、Gwendolyn Chmurny、Christopher J. Michejda
DOI:10.1021/jm00048a016
日期:1994.10
The gastrin receptor is expressed in various human cancers, such as the adenocarcinoma of the colon. The peptide hormone gastrin and the C-terminal peptides derived from it act as growth factors for these cancers. The hypothesis for the present work was to use the gastrin receptor as a target for appropriately constructed cytotoxic agents. We developed methods to link tetragastrin and pentagastrin by their N-termini to cytotoxic 1-(2-chloroethyl)-3-benzyl-3-succinoyltriazene. These compounds, CBS-4 and CBS-5, respectively, whose complete structures were determined by multinuclear NMR and mass spectrometry, competed effectively with gastrin in an assay using either guinea pig stomach fundus or the rat acinar tumor cell line AR42J as the source of the receptor. CBS-5 was cytotoxic to AR42J cells but was not toxic to A549 human lung cancer cells, which do not express the receptor.
US4102878A
申请人:——
公开号:US4102878A
公开(公告)日:1978-07-25
US4172130A
申请人:——
公开号:US4172130A
公开(公告)日:1979-10-23
Enzymatic synthesis of cholecystokinin-octapeptide.
Cholecystokinin-octapeptide was synthesized by enzymatic condensations of three fragments, without side-chain protection, except for Tyr. Fmoc-Asp-Tyr (SO3Ba1/2)-OH, prepared by the concerted action of proteases, followed by pyridinium trifluoroacetylsulfate treatment, was used as the N-terminal fragment. In the final step, the Nα-Fmoc group employed as a sole protecting group was easily removed by base treatment without affecting the SO3 moiety.