Diastereomer-Specific Effects of Double-Stranded Peptides Conjugated with -L-Tyr-L-Phe- or -L-Tyr-D-Phe- Residues on Tyrosine Phosphorylation and Inhibition of srctsNRK, A431, MCF-7, and DU145 Cell Growth
作者:Shigeki Kobayashi、Nahomi Atuchi、Hidetaka Wakamatsu、Mayuko Hattori、Ayumi Kawada、Kouji Asano
DOI:10.1248/cpb.55.1585
日期:——
The interaction between growth inhibition and chirality, especially of diastereomers, has an important modifying effect on cancer cell proliferation. Previously, we have reported on the design, synthesis, and chemical properties of a series of novel, double-stranded peptides, (y-AA–x-AA)2-(CH2)12, with –y-AA–x-AA– and –z-AA–y-AA–x-AA– sequences conjugated to the spacer. Here, we extend those results by showing that (D-, L-) and (L-, D-) diastereomers are more potent inhibitors of tyrosine phosphorylation than (L-, L-). Although the replacement of the L-Phe–L-Phe sequence with L-Tyr–L-Phe produces a less active inhibitor, the double-stranded peptide conjugated with L-Tyr–D-Phe is more active than that conjugated with L-Tyr–L-Phe. In addition, we show that SDS-PAGE gel profiles of tyrosine phosphorylation following treatment with bis(y-Tyr–x-Phe)-N,N-dodecane-1,12-diamine appear very similar to profiles of tyrosine phosphorylation following treatment with an analog of the tyrosine kinase inhibitor, erbstatin. Moreover, the level of autophosphorylation of the epidermal growth factor receptor kinase domain (EGFRKD) treated with bis(L-Tyr–D-Phe)-N,N-dodecane-1,12-diamine was lower than that seen following treatment with bis(L-Phe–D-Phe)-N,N-dodecane-1,12-diamine. These data provide new insights for the control of cancer cell proliferation through drug designs which replace the less active –L-Phe–L-Phe– (and –D-Phe–L-Phe–) with the more active –L-Tyr–L-Phe- (and –L-Tyr–D-Phe–) sequence.
生长抑制与手性之间的相互作用,特别是对映异构体的相互作用,对癌细胞增殖具有重要的修饰效应。此前,我们报告了一系列新颖的双链肽(y-AA–x-AA)₂-(CH₂)₁₂的设计、合成和化学性质,其中包含与间隔连接的–y-AA–x-AA–和–z-AA–y-AA–x-AA–序列。在这里,我们扩展了这些结果,表明(D-,L-)和(L-,D-)对映异构体在酪氨酸磷酸化的抑制效果上比(L-,L-)更强。尽管用L-Tyr–L-Phe序列替换L-Phe–L-Phe序列会产生活性较低的抑制剂,但与L-Tyr–D-Phe连接的双链肽的活性高于与L-Tyr–L-Phe连接的那种。此外,我们显示了处理过双(y-Tyr–x-Phe)-N,N-十二烷-1,12-二胺后的酪氨酸磷酸化的SDS-PAGE凝胶谱与酪氨酸激酶抑制剂erbstatin的类似物处理后的磷酸化谱非常相似。此外,处理过双(L-Tyr–D-Phe)-N,N-十二烷-1,12-二胺的表皮生长因子受体激酶域(EGFRKD)的自磷酸化水平低于处理过双(L-Phe–D-Phe)-N,N-十二烷-1,12-二胺的情况。这些数据为通过药物设计控制癌细胞增殖提供了新视角,药物设计用更具活性的–L-Tyr–L-Phe–(及–L-Tyr–D-Phe–)序列替代活性较低的–L-Phe–L-Phe–(及–D-Phe–L-Phe–)序列。