一氧化氮 (NO) / β-Lapachone (Lap) 通过引起氧化应激的联合治疗是一种有效的肿瘤治疗策略。在此,在辅助脂质(DOPE 和 DSPE-PEG2000)存在下,由锌配位脂质 (DSNO(Zn)) 和疏水药物 Lap 构建了用于 NO / Lap 共同递送的双响应脂质纳米颗粒 (LNP) LSNO。LSNO 中的锌配位结构可能会提高肿瘤细胞中的 Zn2+ 含量,从而导致抗氧化失衡。荧光测定证明了 LSNO 的光触发 NO 释放和荧光自报告能力。此外,LNPs 在高浓度 GSH 下具有良好的药物释放行为,表明 NO / 药物共递送能力。体外抗肿瘤试验显示,NO / Lap 联合治疗组比个体 NO 或 Lap 治疗组可诱导更显著的肿瘤细胞生长抑制和细胞凋亡。以下机制研究表明,NO / Lap 联合处理通过产生活性氧 (ROS) 和过氧亚硝酸盐阴离子 (ONOO–) 导致不同的氧化应激。另一方面,Lap
Alkyl linker effects on the coordination topology of ditopic di(2-pyridylmethyl)amine carboxylate ligands with Zn<sup>II</sup>and Cu<sup>II</sup>: polymers<i>vs.</i>macrocycles
作者:Kiattipoom Rodpun、Allan G. Blackman、Michael G. Gardiner、Eng Wui Tan、Carla J. Meledandri、Nigel T. Lucas
DOI:10.1039/c5ce00375j
日期:——
[Zn(C3COO)(H2O)](ClO4)·3.5H2O}n (1), [Zn(C4COO)(H2O)]4(ClO4)4·1.5H2O}n (2), [Zn(C5COO)(H2O)](ClO4)}n (3), [Cu(C3COO)](ClO4)·MeOH}n (4), [Cu(C4COO)(H2O)]2(ClO4)2·2H2O}n (5) and [Cu(C5COO)(H2O)](ClO4)·2H2O}n (6). In contrast, the ligands with longer alkyl chains (n ≥ 7) participate in Zn2L2 metallomacrocyclic structures [Zn(C7COO)(H2O)](ClO4)}2 (7), [Zn2(C10COO)2(H2O)2](ClO4)2·2H2O·MeOH (8) and [Z
Synthesis, Cytotoxicity, and Insight into the Mode of Action of Re(CO)3 Thymidine Complexes
作者:Mark D. Bartholomä、Anthony R. Vortherms、Shawn Hillier、Birgit Ploier、John Joyal、John Babich、Robert P. Doyle、Jon Zubieta
DOI:10.1002/cmdc.201000196
日期:2010.9.3
and C5 with spacers of various lengths. The corresponding organometallic thymidine complexes were fully characterized by IR and NMR spectroscopy and mass spectrometry. Their cytotoxicity was assessed against the A549 lung carcinoma cellline. Toxicity is dependent on the site and mode of conjugation as well as on the nature and the length of the tether. Moderate toxicity was observed for conjugates carrying
Nuclear Targeting with an Auger Electron Emitter Potentiates the Action of a Widely Used Antineoplastic Drug
作者:Sebastian Imstepf、Vanessa Pierroz、Paula Raposinho、Matthias Bauwens、Michael Felber、Thomas Fox、Adam B. Shapiro、Robert Freudenberg、Célia Fernandes、Sofia Gama、Gilles Gasser、Felix Motthagy、Isabel R. Santos、Roger Alberto
DOI:10.1021/acs.bioconjchem.5b00466
日期:2015.12.16
We present the combination of the clinically well-proven chemotherapeutic agent, Doxorubicin, and 99mTc, an Auger and internal conversion electron emitter, into a dual-action agent for therapy. Chemical conjugation of Doxorubicin to 99mTc afforded a construct which autonomously ferries a radioactive payload into the cell nucleus. At this site, damage is exerted by dose deposition from Auger radiation. The 99mTc-conjugate exhibited a dose-dependent inhibition of survival in a selected panel of cancer cells and an in vivo study in healthy mice evidenced a biodistribution which is comparable to that of the parent drug. The homologous Rhenium conjugate was found to effectively bind to DNA, inhibited human Topoisomerase II, and exhibited cytotoxicity in vitro. The collective in vitro and in vivo data demonstrate that the presented metallo-conjugates closely mimic native Doxorubicin.
A convenient solid-phase synthesis methodology for preparing peptide-derived molecular imaging agents Synthesis, characterization, and in vitro screening of Tc(I) chemotactic peptide conjugates
作者:Karin A Stephenson、Sangeeta Ray Banerjee、Nicole McFarlane、Douglas R Boreham、Kevin P Maresca、John W Babich、Jon Zubieta、John F Valliant
DOI:10.1139/v05-224
日期:2005.12.1
which provided sufficient material to perform complete characterization, radiolabelling, and in vitro screening studies. Because of the robust nature of the metalchelate complexes, the Re complex of a chelatepeptide conjugate was prepared on the resin using the same methodology employed to prepare the free ligand conjugates. As such, the reported methodology is amenable to the preparation of libraries