Using a Build-and-Click Approach for Producing Structural and Functional Diversity in DNA-Targeted Hybrid Anticancer Agents
摘要:
An efficient screening method was developed for functionalized DNA targeted platinum-containing hybrid anticancer agents based on metal mediated amine-to-nitrile addition, a form of "click" chemistry. The goal of the study was in generate platinum-acridine agents for their use as cytotoxic "warheads" in targeted and multifunctional therapies. This was achieved by introducing hydroxl, carboxylic acid, and azide functionalities in the acridine linker moiety and by varying the nonleaving groups attached to platinum. The assay, which was based on microscale reactions between 6 platinum-nitrile complexes and 10 acridine derivatives, yielded a small library of 60 platinum-acridines. Reactions were monitored, and product mixtures were quantitatively analyzed by automated in-line high-performance liquid chromatography-electrospray mass spectrometry (LC-ESMS) analysis and subjected to cell viability screening using a nonradioactive cell proliferation assay. The new prescreening methodology proves to be a powerful tool for establishing structure-activity relationships and for identifying target compounds.
Conjugation of Cisplatin Analogues and Cyclooxygenase Inhibitors to Overcome Cisplatin Resistance
作者:Wilma Neumann、Brenda C. Crews、Menyhárt B. Sárosi、Cristina M. Daniel、Kebreab Ghebreselasie、Matthias S. Scholz、Lawrence J. Marnett、Evamarie Hey-Hawkins
DOI:10.1002/cmdc.201402353
日期:2015.1
against platinum‐based antitumor drugs. Cisplatin analogues were conjugated with COX inhibitors (indomethacin, ibuprofen) to study the synergistic effects that were previously observed in combination treatments. The conjugates ensure concerted transport of both drugs into cells, and subsequent intracellular cleavage enables a dual‐actionmode. Whereas the platinum(II) complexes showed cytotoxicities similar
pH and thermo dual stimulus-responsive liposome nanoparticles for targeted delivery of platinum-acridine hybrid agent
作者:Qian Zhou、Chaoqun You、Yang Ling、Hongshuai Wu、Baiwang Sun
DOI:10.1016/j.lfs.2018.11.052
日期:2019.1
The complexes of the type [PtCl(L2)(ACRAMTU)](NO3)(2) (ACRAMTU=1-[2-(acridin-9-ylamino) ethyl]-1, 3-dimethylthiourea) were synthesized: PT-ACRAMTU (1), L2 = ethane-1,2- diamine (en); PT(dach)-ACRAMTU (2), L2 =(1R, 2R)-1, 2-diaminocyclohexane (dach); PT(pda-OH)-ACRAMTU (3), L2 = 2-hydroxy-1, 3-propanediamine (pda-OH). The complexes containing diverse diamines exhibit different DNA binding capacity and cytotoxicity. Complex 3 shows excellent capability not only on the strongest non-cisplatin-type DNA damage, but also superior anticancer activity in NCI-H460 cells (IC50 = 0.23 +/- 0.05 mu M). For overcoming water insolubly and side effects, we encapsulated complex 3 into liposomes. PT@NPs were characterized in terms of particle size, morphology, drug loading capacity (DLC), encapsulation efficiency (EE) and stability. In vitro triggered release showed that the release of the platinum drug was steerable and the release rate was fast under low pH (< 7.0) and high temperature (> T-m = 41 degrees C). PT@NPs showed significant inhibitory effect in NCI-H460 cells. Flow cytometry analysis indicates G0/G1 phase arrest of cells treated with complex 3, whereas cells treated with cisplatin progress to G2/M of the cell cycle. The mechanistic differences validate that complex 3 is a potent anticancer agent superior than current clinical platinum-based therapies. PT@NPs have the potential in drug delivery systems (DDS) for non-small cell lung cancer (NSCLC) therapy.
作者:Oksanen, Anneli、Kivekaes, Raikko、Lumme, Paavo、Laitalainen, Tarja
DOI:——
日期:——
Using a Build-and-Click Approach for Producing Structural and Functional Diversity in DNA-Targeted Hybrid Anticancer Agents
作者:Song Ding、Xin Qiao、Gregory L. Kucera、Ulrich Bierbach
DOI:10.1021/jm301278c
日期:2012.11.26
An efficient screening method was developed for functionalized DNA targeted platinum-containing hybrid anticancer agents based on metal mediated amine-to-nitrile addition, a form of "click" chemistry. The goal of the study was in generate platinum-acridine agents for their use as cytotoxic "warheads" in targeted and multifunctional therapies. This was achieved by introducing hydroxl, carboxylic acid, and azide functionalities in the acridine linker moiety and by varying the nonleaving groups attached to platinum. The assay, which was based on microscale reactions between 6 platinum-nitrile complexes and 10 acridine derivatives, yielded a small library of 60 platinum-acridines. Reactions were monitored, and product mixtures were quantitatively analyzed by automated in-line high-performance liquid chromatography-electrospray mass spectrometry (LC-ESMS) analysis and subjected to cell viability screening using a nonradioactive cell proliferation assay. The new prescreening methodology proves to be a powerful tool for establishing structure-activity relationships and for identifying target compounds.
Synthesis and studies of anticancer properties of lupane-type triterpenoid derivatives containing a cisplatin fragment
作者:Daniel Emmerich、Kranthi Vanchanagiri、Leopoldo C. Baratto、Harry Schmidt、Reinhard Paschke
DOI:10.1016/j.ejmech.2014.01.031
日期:2014.3
against five different tumor cell lines. The aim was to combine two structural units, both related with apoptosis induction. The derivatives exerted a dose-dependent antiproliferative action at micromolar concentrations and the effect of these structural variations on anticancer activity was studied and discussed. Several compounds revealed significant antitumor activity, as the most active substance 3-O-acetylbetulinic