Preparations and<sup>13</sup>C and<sup>195</sup>Pt NMR Spectra of Platinum(II) Peptide Complexes and Their Growth-Inhibitory Activity against Mouse Meth A Solid Tumor in Vivo
作者:Masatoshi Watabe、Toshio Takayama、Akira Kuwahara、Takako Kawahashi、Yoshio Koike、Akira Horiuchi、Masuko Suzuki、Toshihiko Watanabe、Ken Mikami、Tatuji Matsumoto、Yoshio Narusawa
DOI:10.1246/bcsj.68.2559
日期:1995.9
Several dipeptide complexes of the form K[Pt(x-gly or gly-x)Cl], where x-gly or gly-x stands for a dipeptide anion (where x is glycine, alanine, valine, or leucine) moieties, were synthesized, purified, and characterized by various analytical and spectroscopic techniques (13C, 195Pt NMR and MS(FAB)). The complexes of the form K[Pt(x-gly)Cl] were pale brown and those of K[Pt(gly-x)Cl] were light yellow in solid form or in solution. The former was more labile than the latter in H2O solution. Growth inhibition assays of K[Pt(alagly)Cl], K[Pt(glyala)Cl], and cis-diamminedichloro platinum(II) (Cisplatin) against methylcholanthrene induced Meth A fibrosarcoma (Meth A) solid tumors transplanted in BALB/c mice were measured. In mice in the group administered K[Pt(glyala)Cl] doses of 26 mg kg−1 d−1, 28.9% of slight growth inhibition was observed. The side effects related to the decrease of body weight were mild. Cisplatin did not show any antitumor activity under the present administration conditions. The toxicities of the dipeptide complexes against normal mouse bone marrow cells were measured. All of them exhibited toxicity against bone marrow cells, but K[Pt(alagly)Cl] and K[Pt(glyala)Cl] were 1000 times less toxic than Cisplatin.
合成、纯化并采用多种分析和光谱技术(包括 \(}^13}\)C、\(}^195}\)Pt NMR 和 MS(FAB))对几种二肽配合物 K[Pt(x-gly 或 gly-x)Cl] 进行了表征,其中 x-gly 或 gly-x 代表二肽阴离子(其中 x 为甘氨酸、丙氨酸、缬氨酸或亮氨酸)部分。K[Pt(x-gly)Cl] 型配合物为浅棕色,而 K[Pt(gly-x)Cl] 型配合物在固态或溶液中为淡黄色。前者在水溶液中比后者更不稳定。测定了 K[Pt(alagly)Cl]、K[Pt(glyala)Cl] 和顺铂(cis-diamminedichloroplatinum(II))对 BALB/c 小鼠皮下移植的甲基胆蒽诱导的 Meth A 纤维肉瘤(Meth A)实体瘤的生长抑制作用。在给予 K[Pt(glyala)Cl] 剂量为 26 mg kg\(}^-1}\) d\(}^-1}\)的小鼠组中,观察到 28.9% 的轻微生长抑制。与体重下降相关的副作用较轻微。在目前的给药条件下,顺铂未显示出任何抗肿瘤活性。测定了这些二肽配合物对正常小鼠骨髓细胞的毒性。所有配合物均对骨髓细胞表现出毒性,但 K[Pt(alagly)Cl] 和 K[Pt(glyala)Cl] 的毒性比顺铂低 1000 倍。