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Schobert R, Knauer S, Seibt S, Biersack B. Anticancer Active Illudins: Recent Developments of a Potent Alkylating Compound Class. Curr Med Chem 2011; 18:790-807. [DOI: 10.2174/092986711794927766] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2010] [Accepted: 12/30/2010] [Indexed: 11/22/2022]
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102
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Zoldakova M, Biersack B, Kostrhunova H, Ahmad A, Padhye S, Sarkar FH, Schobert R, Brabec V. (Carboxydiamine)Pt(ii) complexes of a combretastatin A-4 analogous chalcone: the influence of the diamine ligand on DNA binding and anticancer effects. Med Chem Commun 2011. [DOI: 10.1039/c1md00042j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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103
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Schobert R, Effenberger-Neidnicht K, Biersack B. Stable combretastatin A-4 analogues with sub-nanomolar efficacy against chemoresistant HT-29 cells. Int J Clin Pharmacol Ther 2011; 49:71-72. [PMID: 21176734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Affiliation(s)
- R Schobert
- Organic Chemistry Laboratory, University Bayreuth, Bayreuth, Germany.
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104
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Schobert R, Biersack B, Dietrich A, Effenberger K, Knauer S, Mueller T. 4-(3-Halo/amino-4,5-dimethoxyphenyl)-5-aryloxazoles and -N-methylimidazoles That Are Cytotoxic against Combretastatin A Resistant Tumor Cells and Vascular Disrupting in a Cisplatin Resistant Germ Cell Tumor Model. J Med Chem 2010; 53:6595-602. [DOI: 10.1021/jm100345r] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rainer Schobert
- Organic Chemistry Laboratory, University Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Bernhard Biersack
- Organic Chemistry Laboratory, University Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Andrea Dietrich
- Department of Internal Medicine IV, Oncology/Hematology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120 Halle, Germany
| | - Katharina Effenberger
- Organic Chemistry Laboratory, University Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Sebastian Knauer
- Organic Chemistry Laboratory, University Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Thomas Mueller
- Department of Internal Medicine IV, Oncology/Hematology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06120 Halle, Germany
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105
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Zoldakova M, Kornyei Z, Brown A, Biersack B, Madarász E, Schobert R. Effects of a combretastatin A4 analogous chalcone and its Pt-complex on cancer cells: A comparative study of uptake, cell cycle and damage to cellular compartments. Biochem Pharmacol 2010; 80:1487-96. [PMID: 20709029 DOI: 10.1016/j.bcp.2010.07.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 07/23/2010] [Accepted: 07/27/2010] [Indexed: 01/11/2023]
Abstract
The combretastatin A4 analogous chalcone (2E)-3-(3-hydroxy-4-methoxyphenyl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one 1 and its dichloridoplatinum(II) (6-aminomethylnicotinate) complex 2 were previously found to be highly active against a variety of cancer cell lines while differing in their apoptosis induction and long-term regrowth retardation (Schobert et al. [1]). Further differences were identified now. The cellular uptake of complex 2, like that of oxaliplatin, occurred mainly via organic cation transporters (OCT-1/2; ∼32%) and copper transporter related proteins (Ctr1; ∼24%), whereas that of chalcone 1 was dependent on endocytosis (∼80%). Complex 2 was more tumour-specific than 1 concerning neural cells. This was apparent from the ratios of IC(50)(48h) values against primary astrocytes versus human glioma cells U87 (>7000 for complex 2; 55 for compound 1). In tubulin-rich neurons and 518A2 melanoma cells complex 2 disrupted microtubules and actin filaments. Cancer cells treated with 2 could repair the cytoskeletal damage but ceased to proliferate and perished. Complex 2 was particularly cytotoxic against P-gp-rich cells. It acted as a substrate for ABC-transporters of types BCRP, MRP3, and MRP1 and so was less active against the corresponding cancer cell lines. Complex 2 arrested the cell cycle of the melanoma cells in G(1) and G(2)/M phases. A fragmentation of their Golgi apparatus was observed by TEM for incubation with complex 2 but not with 1. In conclusion, unlike chalcone 1, its platinum complex 2 is highly cell line specific, is taken up via cell-controlled transporters and induces apoptosis by triggering multiple targets.
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Affiliation(s)
- Miroslava Zoldakova
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
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106
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Abstract
Three new oxazole-bridged combretastatin A analogues with additional functional groups at the B-ring [-SMe, -OH, p-quinone] were tested for antiproliferative activity and specificity on human HL-60 leukemia, 518A2 melanoma, and colon carcinomas HCT-116 (wt)/(p53(-/-)) and HT-29 cells. While all oxazoles, except quinone 8, were efficacious against HCT-116 cells at submicromolar IC(50) values (48 h incubation), only thioanisole 5 achieved this potency in combretastatin-refractory HT-29 cells by significant upregulation of p21(cip1/waf1) associated with an S/G(2) cell-cycle arrest.
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Affiliation(s)
- Bernhard Biersack
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
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107
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Biersack B, Zoldakova M, Effenberger K, Schobert R. (Arene)Ru(II) complexes of epidermal growth factor receptor inhibiting tyrphostins with enhanced selectivity and cytotoxicity in cancer cells. Eur J Med Chem 2010; 45:1972-5. [PMID: 20149940 DOI: 10.1016/j.ejmech.2010.01.040] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 01/15/2010] [Accepted: 01/18/2010] [Indexed: 11/29/2022]
Abstract
Ru(eta6-arene) complexes of epidermal growth factor receptor (EGFR) inhibiting tyrphostins 1a and 1b were prepared, characterized and tested for DNA interaction and bioactivity in four human tumor cell lines. The intrinsic cytotoxicity and cell line selectivity of o-hydroxyanisol 1a was greatly enhanced in its Ru(eta6-p-cymene) complex 2a and in its Ru(eta6-toluene) complex 3a. Complex 2a was particularly efficacious against multi-drug resistant EGFR(+) MCF-7/Topo breast carcinoma cells and also against mTOR-dependent EGFR(-) HL-60 leukemia cells. Complex 3a showed enhanced activity only against 518A2 melanoma cells and HL-60 cells, which are both known to express the mTOR protein. DNA was strongly metallated (ca. 1.7-2%) by all new Ru complexes without undergoing topological changes. Apparently, by complexation to Ru fragments tyrphostin derivatives can address additional biological targets in a manner instrumental to antitumoral strategies.
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Affiliation(s)
- B Biersack
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany
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109
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Schobert R, Biersack B, Dietrich A, Knauer S, Zoldakova M, Fruehauf A, Mueller T. Pt(II) Complexes of a Combretastatin A-4 Analogous Chalcone: Effects of Conjugation on Cytotoxicity, Tumor Specificity, and Long-Term Tumor Growth Suppression. J Med Chem 2008; 52:241-6. [PMID: 19102652 DOI: 10.1021/jm801001d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Bernhard Biersack
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Andrea Dietrich
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Sebastian Knauer
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Miroslava Zoldakova
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Angelika Fruehauf
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
| | - Thomas Mueller
- Organic Chemistry Laboratory, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany, and Department of Internal Medicine IV, Oncology/Hematology, Research Laboratory, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
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Biersack B, Diestel R, Jagusch C, Rapp G, Sasse F, Schobert R. First Syntheses of Melophlins P, Q, and R, and Effects of Melophlins on the Growth of Microorganisms and Tumor Cells. Chem Biodivers 2008; 5:2423-30. [DOI: 10.1002/cbdv.200890207] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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111
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Bernhardt G, Biersack B, Bollwein S, Schobert R, Zoldakova M. Terpene Conjugates of Diaminedichloridoplatinum(II) Complexes: Antiproliferative Effects in HL-60 Leukemia, 518A2 Melanoma, and HT-29 Colon Cancer Cells. Chem Biodivers 2008; 5:1645-1659. [DOI: 10.1002/cbdv.200890152] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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112
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Schobert R, Bernhardt G, Biersack B, Bollwein S, Fallahi M, Grotemeier A, Hammond GL. Steroid conjugates of dichloro(6-aminomethylnicotinate)platinum(II): effects on DNA, sex hormone binding globulin, the estrogen receptor, and various breast cancer cell lines. ChemMedChem 2008; 2:333-42. [PMID: 17266159 DOI: 10.1002/cmdc.200600173] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Esters of 6-aminomethylnicotinic acid with various steroidal alcohols were treated with K(2)PtCl(4) to give the N,N-chelated dichloroplatinum(II) complex conjugates 4. Their interaction with plasmid DNA was monitored by electrophoretic mobility measurements. Their affinities towards sex hormone binding globulin (SHBG) and towards the nuclear estrogen receptor ER(alpha) were assessed by competitive displacement radioassays. The inhibitory effect of 4 on breast tumour cells MCF-7 ER(+)/ER(-) and MDA-MB-231 was investigated in vitro. Conjugates with 3-O-linked estrogens 4 a,b or 17-O-linked androgens 4 g bound strongly to SHBG. The conjugate complex 4 b, featuring a 3-O-linked estradiol, also bound strongly and agonistically to the estrogen receptor. It also elicited distinct growth retardation of MCF-7 (ER(+)) cells, presumably by a mechanism different from that of cisplatin.
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Affiliation(s)
- Rainer Schobert
- Organisch-chemisches Laboratorium der Universität, 95447 Bayreuth, Germany.
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113
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Schobert R, Biersack B, Dietrich A, Grotemeier A, Müller T, Kalinowski B, Knauer S, Voigt W, Paschke R. Monoterpenes as drug shuttles: cytotoxic (6-aminomethylnicotinate)dichloridoplatinum(II) complexes with potential to overcome cisplatin resistance. J Med Chem 2007; 50:1288-93. [PMID: 17328536 DOI: 10.1021/jm061379o] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(6-Aminomethylnicotinate)dichloridoplatinum(II) complexes 4 esterified with terpene alcohols were tested on a panel of five human tumor cell lines. While they were accumulated in all cell lines more readily than cisplatin (CDDP), their cytotoxicities were tumor-specific and structure-dependent. Cell lines known to feature elevated levels of antiapoptotic, ion-channel-affecting proteins or otherwise impaired caspase-9 activation responded better to 4 than to CDDP, e.g., the HL-60 leukemia to the fenchyl and bornyl derivatives 4a,b at an IC90 < or = 10 microM. The (-)-menthyl complex 4g was far better accumulated and more efficacious in CDDP-resistant 1411HP male germ cell tumor cells than in the congenerous CDDP-sensitive H12.1 cell line. 4g also broke the CDDP resistance of 518A2 melanoma cells. Cell decay in each case was apoptotic as to TUNEL and Annexin V fluorescence assays. Some complexes 4 seem to positively modulate the permeability of the cell membrane and of blocked mitochondrial anion channels.
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Affiliation(s)
- Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany.
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