氨基二硫代甲酸酯类抗肿瘤药物研究Ⅰ.哌嗪基二硫代甲酸酯类化合物的合成及活性

发现毒副作用小、活性强的新抗肿瘤药物一直是该领域研究的主要目标.发现结构全新的先导物和新的作用机制是实现这一目标的重要途径.氨基二硫代甲酸酯类化合物具有抗炎、抗菌、杀虫、防腐等生物活性,然而,关于抗肿瘤作用方面的研究却很少有报道.我们在研究中发现了一系列具有明显抗肿瘤作用的氨基二硫代甲酸酯类化合物[1],其中化合物990208经体内抗肿瘤活性和毒性试验证实是最好的化合物之一.为进一步优化化合物990208的结构,研究其构效关系,本文设计合成了一系列990208衍生物.     

THE SYNTHESIS AND CHARACTERIZATION OF Ba-CROSSLINKED POLYMER ANTI-RADIATION MATERIALS

Crosslinked poly(methyl methacrylate) and polystyrene with barium dimethacrylate [Ba(MA)_2] as crosslinking agent have been synthesized. The relationship between X-ray absorbability and the content of Ba(MA)_2 in polymers was investigated. TGA and DSC results indicated that the crosslinked polymers containing barium dimethacrylate have a much better heat stability than pure PMMA or PS. The mechanical properties of the polymers containing barium are improved in comparison with the pure PMMA.     

混胺(NH3/CH3NH2)草酸根合铂(Ⅱ)混配配合物对人体癌细胞的作用及机制

采用MTT和SRB法研究了混胺(NH3/CH3NH 2)草酸根合铂(Ⅱ)混配配合物(MAOX)对人体癌细胞的增殖抑制作用,又通过流式细胞法、Giemsa染色法、等离子体质谱法研究了它的抗癌机制.实验结果表明:在10μm0l·L1浓度下,该配合物对HL-60和EJ两种细胞有较高的活性,其抑制率分别为51.35%和45.86%;它能阻止HL 60细胞G2+M→G1期的进行,造成G2+M期细胞的堆积;对HL-60细胞的凋亡诱导作用不明显;在相同浓度情况下其与HL-60细胞的DNA键合量大于顺铂.     

对称胺和不对称胺的二碘合铂(Ⅱ)混配配合物的合成及其抗肿瘤活性

合成了6种对称胺的二碘合铂(Ⅱ)配合物cis-[Pt(CH3NH2)2I2](1),cis-[Pt(C2H5NH2)2I 2](2)和cis-[Pt (()-NH 2)2I2](3)以及不对称胺的二碘合铂(Ⅱ)配合物cis-[Pt(CH3NH2)(NH3)I2](4),cis-[Pt(C 2H5NH2)(NH3)I 2](5)和(cis-[Pt(()-NHz)(NH3)I2](6).用元素分析和红外光谱对其进行了表征.体外抗肿瘤活性表明,不对称胺的二碘合铂(Ⅱ)配合物的抗肿瘤活性明显好于其相应的对称胺的二碘合铂(Ⅱ)配合物,载体基团环己胺可能是非常重要的药效基团.     

二水羧酸根合铂(II)混配配合物的合成及其抗肿瘤活性

首次合成两种二水羧酸根合铂类配合物[Pt(II) (H2 O) 2 (OOC—CH2 NH2 ) 2 ](1)和[Pt(II) (H2 O) 2 (OOC—CH=CHCOO) ](2 ) .用元素分析、摩尔电导、差热热重分析、红外光谱、紫外光谱和核磁共振氢谱对其进行了表征.体外抗肿瘤活性表明,两种配合物对所试的肿瘤细胞表现出较低的活性,在10 μM浓度下配合物对人膀胱癌细胞EJ的增殖抑制率分别为2 5 .77%和2 8.2 7% .     

对称胺和不对称胺的二碘合铂(II)混配配合物的合成及其抗肿瘤活性

合成了6种对称胺的二碘合铂(II)配合物cis- [Pt(CH3NH2 ) 2 I2 ](1) ,cis- [Pt(C2 H5NH2 ) 2 I2 ](2 )和cis- [Pt(—NH2 ) 2 I2 ](3)以及不对称胺的二碘合铂(II)配合物cis- [Pt(CH3NH2 ) (NH3) I2 ](4) ,cis- [Pt(C2 H5NH2 )(NH3) I2 ](5 )和(cis- [Pt(—NH2 ) (NH3) I2 ](6 ) .用元素分析和红外光谱对其进行了表征.体外抗肿瘤活性表明,不对称胺的二碘合铂(II)配合物的抗肿瘤活性明显好于其相应的对称胺的二碘合铂(II)配合物,载体基团环己胺可能是非常重要的药效基团.     

Interactions with ATP, DNA Cleavage and Anti-tumor Activities of Complexes with Anions [Mo（V）O2（O2CeH4）2]^3-, [Mo（Ⅴ）0.5W（Ⅵ）0.5O2（O2C6H4）2]^2.5- and [W（Ⅵ）O2（O2C6H4）2]^2-

(NH3CH2CH2NH2)3[Mo(Ⅴ)O2(O2C6H4)2] (1), (NH3CH2CH2NH2)2.5[Mo(Ⅴ)o.sW(Ⅵ)o.502(O2C6H4)2] (2) and(NH3CH2CH2NH2)2[VC(Ⅵ)O2(O2C6H4)2] (3) were synthesized, structurally characterized by X-ray diffraction analysis, and studied on their interactions with ATP, their DNA cleavage activities and antitumor properties. The redox state of molybdenum was not changed on going from crystal to aqueous solutions in complexes 1 and 2, while tungsten underwent reduction from W(VI) to W(V) in complexes 2 and 3. ATP promoted the oxidation of both molybdenum and tungsten from M(Ⅴ) to M(Ⅵ) and the hydrolysis of catecholate ligands in solution consisting of ATP and the complexes. Complex 1 possesses fairly good activity to DNA cleavage and against tumor S180 in mice, and is more effective than the control drug cyclophosphamide under the identical conditions. However, complexes 2 and 3 exhibited marginal effectiveness. The effectiveness of anti-tumor of the complexes was related positively to their DNA cleavage activities and their hydrolysis of catecholate ligands.     

合欢皮中两个新八糖苷的分离鉴定和活性研究

从合欢皮95%乙醇提取物中分离得到2个新的八糖苷(1, 2), 经化学方法与光谱分析将其结构鉴定为3-O-[β-D-吡喃木糖基-(1→2)-α-L-吡喃阿拉伯糖基-(1→6)-β-D-吡喃葡萄糖基]-21-O-[(6S)-2-反式-2-羟甲基-6-甲基-6-O-β-D-吡喃鸡纳糖基-2,7-辛二烯酸基]-金合欢酸-28-O-β-D-吡喃葡萄糖基-(1→3)-[α-L-呋喃阿拉伯糖基-(1→4)]-α-L-吡喃鼠李糖基- (1→2)-β-D-吡喃葡萄糖基酯(1)和3-O-[β-D-吡喃木糖基-(1→2)-α-L-吡喃阿拉伯糖基-(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖基]-21-O-[(6S)-2-反式-2-羟甲基-6-甲基-6-O-β-D-吡喃鸡纳糖基-2,7-辛二烯酸基]-金合欢酸-28-O-β-D-吡喃葡萄糖基-(1→3)-[α-L-呋喃阿拉伯糖基-(1→4)]-α-L-吡喃鼠李糖基-(1→2)-β-D-吡喃葡萄糖基酯(2), 分别命名为合欢皂苷J₂₅ (1, Julibroside J₂₅)和合欢皂苷J₂₂ (2, Julibroside J₂₂). 1和2在体外对4种人癌细胞增殖有明显的抑制作用.     

新型双核铂(Ⅱ)类配合物的合成、表征及其抗肿瘤活性

合成3个新的双核铂（Ⅱ）类配合物，用元素分析、红外和紫外光谱、氢核磁共振谱及摩尔电导和热谱等方法对其进行了性质表征，并对它们进行了抗肿瘤活性的初步研究。