Structure−Activity Relationship Studies Optimizing the Antiproliferative Activity of Novel Cyclic Somatostatin Analogues Containing a Restrained Cyclic β-Amino Acid
作者:Martin Sukopp、Richard Schwab、Luciana Marinelli、Eric Biron、Markus Heller、Edit Várkondi、Ákos Pap、Ettore Novellino、György Kéri、Horst Kessler
DOI:10.1021/jm049500j
日期:2005.4.1
The cyclic somatostatin analogue cyclo[Pro(1)-Phe(2)-D-Trp(3)-Lys(4)-Thr(5)-Phe(6)] (L-363,301) displays high biological activity in inhibiting the release of growth hormone, insulin, and glucagon. According to the sequence of L-363,301, we synthesized a number of cyclic hexa- and pentapeptides containing nonnatural alpha- and beta-amino acids. The N- fluorenylmethoxycarbonyl protected cyclic beta-amino
环状生长抑素类似物环[Pro(1)-Phe(2)-D-Trp(3)-Lys(4)-Thr(5)-Phe(6)](L-363,301)在抑制细胞生长方面表现出高生物活性。释放生长激素,胰岛素和胰高血糖素。根据L-363,301的序列,我们合成了许多含有非天然α-和β-氨基酸的环状六肽和五肽。N-芴基甲氧基羰基保护的环状β-氨基酸[1S,2S,5R] -2-氨基-3,5-二甲基-2-环己-3-烯基羧酸(cbetaAA),用于取代Phe(6)- L-363,301的Pro(1)部分是使用(-)-8-苯基薄荷醇作为手性助剂,通过对映选择性多组分反应分两步合成的。所得的肽环[cbetaAA(1)-Tyr(2)-D-Trp(3)-Nle(4)-Thr(Trt)(5)](Trt =三苯甲基)在具有A431癌细胞。没有Trt基团的相同肽没有显示任何生物学活性,而L-363,301和紧密相关的六肽仅显示了较