Hybrid Drugs-A Strategy for Overcoming Anticancer Drug Resistance?

Despite enormous progress in the treatment of many malignancies, the development of cancer resistance is still an important reason for cancer chemotherapy failure. Increasing knowledge of cancers' molecular complexity and mechanisms of their resistance to anticancer drugs, as well as extensive clinical experience, indicate that an effective fight against cancer requires a multidimensional approach. Multi-target chemotherapy may be achieved using drugs combination, co-delivery of medicines, or designing hybrid drugs.

Cinnoline Scaffold-A Molecular Heart of Medicinal Chemistry?

The cinnoline nucleus is a very important bicyclic heterocycle that is used as the structural subunit of many compounds with interesting pharmaceutical properties. Cinnoline derivatives exhibit broad spectrum of pharmacological activities such as antibacterial, antifungal, antimalarial, anti-inflammatory, analgesic, anxiolytic and antitumor activities. Some of them are under evaluation in clinical trials.

Synthesis, Biological Activity and Preliminary in Silico ADMET Screening of Polyamine Conjugates with Bicyclic Systems.

Polyamine conjugates with bicyclic terminal groups including quinazoline, naphthalene, quinoline, coumarine and indole have been obtained and their cytotoxic activity against PC-3, DU-145 and MCF-7 cell lines was evaluated in vitro. Their antiproliferative potential differed markedly and depended on both their chemical structure and the type of cancer cell line. Noncovalent DNA-binding properties of the most active compounds have been examined using ds-DNA thermal melting studies and topo I activity assay.

Anticancer activity of some polyamine derivatives on human prostate and breast cancer cell lines.

The aim of this study was to expand our knowledge about anticancer activity of some polyamine derivatives with quinoline or chromane as terminal moieties. Tested compounds were evaluated in vitro towards metastatic human prostate adenocarcinoma (PC3), human carcinoma (DU145) and mammary gland adenocarcinoma (MCF7) cell lines. Cell viability was estimated on the basis of mitochondrial metabolic activity using water-soluble tetrazolium WST1 to establish effective concentrations of the tested compounds under experimental conditions.

DNA Interaction Studies of Selected Polyamine Conjugates.

The interaction of polyamine conjugates with DNA double helix has been studied. Binding properties were examined by ethidium bromide (EtBr) displacement and DNA unwinding/topoisomerase I/II (Topo I/II) activity assays, as well as dsDNA thermal stability studies and circular dichroism spectroscopy. Genotoxicity of the compounds was estimated by a comet assay.

IN SILICO ADME STUDIES OF POLYAMINE CONJUGATES AS POTENTIAL ANTICANCER DRUGS.

The ADME properties and drug-likeness of several polyamine derivatives containing dimeric phthalimide, quinoline, cinnoline and chromone moieties with three different polyamines: 1,4-bis(3-aninopropyl)piperazine, 4,9-dioxa-1,12-dodecanediamine and 3,3-diamino-N-methyldipropylamine as linkers were presented. These compounds are structurally related to DNA bisintercalators, a group of agents with anti-cancer activity. Their biological properties were previously assessed in vitio in a highly aggressive melanoma cell line A375.

Synthesis and biological evaluation of new bischromone derivatives with antiproliferative activity.

The synthesis of new bischromone derivatives (4a-c and 5a-c) as potential anticancer drugs is described. The difference in the reactivity between 4-oxo-4H-chromene-3-carboxylic acid 2 (or its methyl ester 3) and 4-oxo-4H-chromene-3-carbonyl chloride 1 with three different polyamines: 3,3'-diamino-N-methyldipropylamine (a), 1,4-bis(3-aminopropyl)piperazine (b), 4,9-dioxa-1,12-dodecanediamine (c) resulted in the formation of two different groups of products, compounds 4a-c and 5a-c, designed in agreement with the bisintercalators' structural requirements. The transformation of 4-oxo-4H-chromene-3-carboxylic acid into 2H-chromene-2,4(3H)-diones (5) was confirmed by the NMR and XRD experiments.

Synthesis and in vitro biological evaluation of new polyamine conjugates as potential anticancer drugs.

The synthesis of new polyamine derivatives containing dimeric quinoline (3a-c), cinnoline (4a-c) and phthalimide (7a-c and 8a-c) moieties is described. Three different polyamines: (1,4-bis(3-aminopropyl)piperazine (a), 4,9-dioxa-1,12-dodecanediamine (b), 3,3'-diamino-N-methyldipropylamine (c) were used as linkers. The new compounds were obtained according to known procedures.