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Milan, Italy

La Regina G.,University of Rome La Sapienza | Bai R.,Frederick National Laboratory for Cancer Research | Coluccia A.,University of Rome La Sapienza | Famiglini V.,University of Rome La Sapienza | And 22 more authors.
Journal of Medicinal Chemistry | Year: 2014

We synthesized 3-aroyl-1-arylpyrrole (ARAP) derivatives as potential anticancer agents having different substituents at the pendant 1-phenyl ring. Both the 1-phenyl ring and 3-(3,4,5-trimethoxyphenyl)carbonyl moieties were mandatory to achieve potent inhibition of tubulin polymerization, binding of colchicine to tubulin, and cancer cell growth. ARAP 22 showed strong inhibition of the P-glycoprotein-overexpressing NCI-ADR-RES and Messa/Dx5MDR cell lines. Compounds 22 and 27 suppressed in vitro the Hedgehog signaling pathway, strongly reducing luciferase activity in SAG treated NIH3T3 Shh-Light II cells, and inhibited the growth of medulloblastoma D283 cells at nanomolar concentrations. ARAPs 22 and 27 represent a new potent class of tubulin polymerization and cancer cell growth inhibitors with the potential to inhibit the Hedgehog signaling pathway. © 2014 American Chemical Society.

Thaler F.,Italian National Cancer Institute | Mercurio C.,Genextra
ChemMedChem | Year: 2014

Histone deacetylases (HDACs) are widely studied targets for the treatment of cancer and other diseases. Up to now, over twenty HDAC inhibitors have entered clinical studies and two of them have already reached the market, namely the hydroxamic acid derivative SAHA (vorinostat, Zolinza) and the cyclic depsipeptide FK228 (romidepsin, Istodax) that have been approved for the treatment of cutaneous T-cell lymphoma (CTCL). A common aspect of the first HDAC inhibitors is the absence of any particular selectivity towards specific isozymes. Some of molecules resulted to be "pan"-HDAC inhibitors, while others are classa I selective. In the meantime, the knowledge of HDAC biology has continuously progressed. Key advances in the structural biology of various isozymes, reliable molecular homology models as well as suitable biological assays have provided new tools for drug discovery activities. This Minireview aims at surveying these recent developments as well as the design, synthesis and biological characterization of isoform-selective derivatives. © 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.

Barker J.J.,Evotec | Barker O.,Evotec | Courtney S.M.,Evotec | Gardiner M.,Evotec | And 8 more authors.
ChemMedChem | Year: 2010

Hooking up! Hsp90 is a molecular chaperone involved in the stabilisation of numerous client proteins including those involved in oncogenic transformations. Through a high-throughput biochemical fragment screen, we have identified novel fragment inhibitors of Hsp90. Two fragment hits were combined to give a dual-fragment Hsp90 complex, and the following successful fragment-linking resulted in a 1000-fold improvement in activity. (Chemical Equation Presented). © 2010 Wiley-VCH Verlag GmbH & Co. KGaA.

Fanelli M.,Urbino University | Amatori S.,Urbino University | Amatori S.,Italian National Cancer Institute | Barozzi I.,Italian National Cancer Institute | And 17 more authors.
Proceedings of the National Academy of Sciences of the United States of America | Year: 2010

Epigenetic alterations in the pattern of DNA and histone modifications play a crucial role in cancer development. Analysis of patient samples, however, is hampered by technical limitations in the study of chromatin structure from pathology archives that usually consist of heavily fixed, paraffin-embedded material. Here, we present a methodology [pathology tissue-ChIP (PAT-ChIP)] to extract and immunoprecipitate chromatin from paraffin-embedded patient samples up to several years old. In a pairwise comparison with canonical ChIP, PAT-ChIP showed a high reproducibility of results for several histone marks and an identical ability to detect dynamic changes in chromatin structure upon pharmacological treatment. Finally, we showed that PAT-ChIP can be coupled with high-throughput sequencing (PAT-ChIP-Seq) for the genome-wide analysis of distinct chromatin modifications. PAT-ChIP therefore represents a versatile procedure and diagnostic tool for the analysis of epigenetic alterations in cancer and potentially other diseases.

La Regina G.,University of Rome La Sapienza | Bai R.,U.S. National Institutes of Health | Rensen W.M.,CNR Institute of Molecular Biology and Pathology | Di Cesare E.,CNR Institute of Molecular Biology and Pathology | And 29 more authors.
Journal of Medicinal Chemistry | Year: 2013

New arylthioindole derivatives having different cyclic substituents at position 2 of the indole were synthesized as anticancer agents. Several compounds inhibited tubulin polymerization at submicromolar concentration and inhibited cell growth at low nanomolar concentrations. Compounds 18 and 57 were superior to the previously synthesized 5. Compound 18 was exceptionally potent as an inhibitor of cell growth: it showed IC50 = 1.0 nM in MCF-7 cells, and it was uniformly active in the whole panel of cancer cells and superior to colchicine and combretastatin A-4. Compounds 18, 20, 55, and 57 were notably more potent than vinorelbine, vinblastine, and paclitaxel in the NCI/ADR-RES and Messa/Dx5 cell lines, which overexpress P-glycoprotein. Compounds 18 and 57 showed initial vascular disrupting effects in a tumor model of liver rhabdomyosarcomas at 15 mg/kg intravenous dosage. Derivative 18 showed water solubility and higher metabolic stability than 5 in human liver microsomes. © 2012 American Chemical Society.

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