1
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Wehbe M, Malhotra A, Anantha M, Roosendaal J, Leung AWY, Plackett D, Edwards K, Gilabert-Oriol R, Bally MB. A simple passive equilibration method for loading carboplatin into pre-formed liposomes incubated with ethanol as a temperature dependent permeability enhancer. J Control Release 2017; 252:50-61. [PMID: 28286316 DOI: 10.1016/j.jconrel.2017.03.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/17/2017] [Accepted: 03/04/2017] [Indexed: 02/01/2023]
Abstract
A passive equilibration method which relies on addition of candidate drugs to pre-formed liposomes is described as an alternative method for preparing liposome encapsulated drugs. The method is simple, rapid and applicable to liposomes prepared with high (45mol%) or low (<20mol%) levels of cholesterol. Passive equilibration is performed in 4-steps: (i) formation of liposomes, (ii) addition of the candidate drug to the liposomes in combination with a permeability enhancing agent, (iii) incubation at a temperature that facilitates diffusion of the added compound across the lipid bilayer, and (iv) quenching the enhanced membrane permeability by reduction in temperature and/or removal of the permeabilization enhancer. The method is fully exemplified here using ethanol as the permeabilization enhancer and carboplatin (CBDCA) as the drug candidate. It is demonstrated that ethanol can be added to liposomes prepared with 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and Cholesterol (Chol) (55:45mol ratio) in amounts up to 30% (v/v) with no change in liposome size, even when incubated at temperatures>60°C. Super-saturated solutions of CBDCA (40mg/mL) can be prepared at 70°C and these are stable in the presence of ethanol even when the temperature is reduced to <30°C. maximum CBDCA encapsulation is achieved within 1h after the CBDCA solution is added to pre-formed DSPC/Chol liposomes in the presence of 30% (v/v) ethanol at 60°C. When the pre-formed liposomes are mixed with ethanol (30% v/v) at or below 40°C, the encapsulation efficiency is reduced by an order of magnitude. The method was also applied to liposomes prepared from other compositions include a cholesterol free formulations (containing 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[carboxy(polyethylene glycol)-2000] (DSPE-PEG2000)) and a low Chol (<20mol%) formulations prepared with the distearoyl-sn-glycero-3-phospho-(1'-rac-glycerol) DSPG)). The cytotoxic activity of CBDCA was unaffected when prepared in this manner and two of the resultant formulations exhibited good stability in vitro and in vivo. The cytotoxic activity of CBDCA was unaffected when prepared in this manner and the resultant formulations exhibited good stability in vitro and in vivo. Pharmacokinetics studies in CD-1 mice indicated that the resulting formulations increased the circulation half life of the associated CBDCA significantly (AUC0-24h of CBDCA=0.016μg·hr/mL; AUC0-24h of the DSPC/Chol CBDCA formulation=1014.0μg·hr/mL and AUC0-24h of the DSPC/DSPG/Chol CBDCA formulation=583.96μg·hr/mL). Preliminary efficacy studies in Rag-2M mice with established subcutaneous H1975 and U-251 tumors suggest that the therapeutic activity of CBDCA is improved when administered in liposomal formulations. The encapsulation method described here has not been disclosed previously and will have broad applications to drugs that would normally be encapsulated during liposome manufacturing.
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Affiliation(s)
- Moe Wehbe
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada.; Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 East Mall, Vancouver, BC V6T 1Z3, Canada..
| | - Armaan Malhotra
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada
| | - Malathi Anantha
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada
| | - Jeroen Roosendaal
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada.; Department of Pharmaceutics, Section of Biopharmacy and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Ada W Y Leung
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada.; Department of Pathology and Laboratory Medicine, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - David Plackett
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 East Mall, Vancouver, BC V6T 1Z3, Canada
| | - Katarina Edwards
- Department of Chemistry, University of Uppsala, 3 Husargatan (B7), Uppsala, Sweden
| | - Roger Gilabert-Oriol
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada
| | - Marcel B Bally
- Experimental Therapeutics, British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada.; Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 East Mall, Vancouver, BC V6T 1Z3, Canada.; Department of Pathology and Laboratory Medicine, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada.; Center for Drug Research and Development, Vancouver, BC V6T 1Z4, Canada
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2
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Utku S, Özçelik AB, Gümüş F, Yılmaz Ş, Arsoy T, Açık L, Çelebi Keskin A. Synthesis, in-vitro cytotoxic activity and DNA interactions of new dicarboxylatoplatinum(II) complexes with 2-hydroxymethylbenzimidazole as carrier ligands. J Pharm Pharmacol 2014; 66:1593-605. [DOI: 10.1111/jphp.12290] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 06/29/2014] [Indexed: 11/30/2022]
Abstract
Abstract
Objectives
The aim of this study was to investigate the in-vitro cytotoxic activity of new platinum(II) complexes on the human HeLa (ER−), MCF-7 (ER+) and MDA-MB 231 (ER−) cell lines. Furthermore, we investigated plasmid DNA interactions and inhibition of BamHI and HindIII restriction enzyme activity of the complex 1–4,7.
Methods
Platinum(II) complexes were synthesised from precursor complexes of [PtL2Cl2] and [PtL2I2]. Their cytotoxic activity was tested by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. Their plasmid DNA interactions and restriction enzyme activities were also investigated using the agarose gel electrophoresis method.
Key findings
The growth inhibitory effect results showed that the cytotoxicity of complex 2 was found to be the most active complex among the synthesised complexes.
Conclusions
The MTT results showed that complex 2 was found to be cytotoxic equal to cisplatin and higher than carboplatin against the MCF-7 and MDA-MB-231 cell lines. Furthermore, the estrogen or progesterone co-treatment slightly increased the cytotoxicity of complex 2, the cisplatin and carboplatin compared with the complex 2 tested alone in 50 μm concentration. According to plasmid DNA interaction and the restriction studies, complexes 1–4,7 modified the tertiary structure of pBR322 plasmid DNA, and complexes 2–4 prevented enzyme digestion at high concentrations.
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Affiliation(s)
- Semra Utku
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mersin University, Mersin, Turkey
| | - Azime Berna Özçelik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Fatma Gümüş
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Şükran Yılmaz
- Department of Biology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Taibe Arsoy
- Department of Biology, Faculty of Pharmacy, Gazi University, Ankara, Turkey
| | - Leyla Açık
- Cell and Virus Bank Department, Foot and Mouth Disease Institute, Ankara, Turkey
| | - Ayten Çelebi Keskin
- Department of Biology, Faculty of Art and Science, Kırıkkale University, Kırıkkale, Turkey
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3
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Preparation and characterization of diiron diselenolato complexes containing a dioxane ring as models for [FeFe]-hydrogenases. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9844-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Antitumor activities and interaction with DNA of oxaliplatin-type platinum complexes with linear or branched alkoxyacetates as leaving groups. J Inorg Biochem 2011; 105:1095-101. [DOI: 10.1016/j.jinorgbio.2011.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 05/11/2011] [Accepted: 05/11/2011] [Indexed: 11/20/2022]
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5
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Niksch T, Görls H, Friedrich M, Oilunkaniemi R, Laitinen R, Weigand W. Synthesis and Characterisation of 2,2-Bis(hydroxymethyl)-1,3-diselenolato Metal(II) Complexes Bearing Various Phosphanes. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900824] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Han ZY, Xiao H, Gong LZ. Dynamic kinetic asymmetric transfer hydrogenation of racemic 2,4-diaryl-2,3-dihydrobenzo[b][1,4]diazepines catalyzed by chiral phosphoric acids. Bioorg Med Chem Lett 2009; 19:3729-32. [DOI: 10.1016/j.bmcl.2009.05.039] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2009] [Revised: 05/11/2009] [Accepted: 05/12/2009] [Indexed: 11/27/2022]
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7
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Liu X, Shen H, Zhu H, Cui K, Gou S. In vitro cytotoxicity study on platinum (II) complexes with epoxysuccinates as leaving groups. Bioorg Med Chem Lett 2007; 17:3831-4. [PMID: 17533124 DOI: 10.1016/j.bmcl.2007.05.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 04/11/2007] [Accepted: 05/08/2007] [Indexed: 10/23/2022]
Abstract
A series of novel cisplatin-type platinum complexes were designed, characteristic of epoxysuccinates as leaving groups. The pertinent compounds were prepared and characterized by IR, (1)H NMR, and ESI-MS spectra with elementary analyses. The in vitro cytotoxic activities of compounds toward SPC-A1 human lung adenocarcinoma cell line and BGC823 human stomach adenocarcinoma cell line were determined. Biological tests have confirmed that complexes containing 4R,5R-DMID [abbreviation of (4R,5R)-4,5-bis (aminomethyl)-2-isopropyl-1,3-dioxolane] as carrier ligands have greater cytotoxicity toward tumor cells than the corresponding compounds with other carrier ligands. Most platinum complexes with trans-epoxysuccinates usually have higher cytotoxicity than those with cis-epoxysuccinates. Complex 4a shows the most effective among those tested platinum complexes in both cell lines, and its cytotoxicity approached that of cisplatin.
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Affiliation(s)
- Xia Liu
- State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
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8
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Raja S, Dhamodharan R. Synthesis and Characterization of a Novel, Water‐Soluble Polymer with Pendant Groups Carrying cis‐Platinum Complex. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2004. [DOI: 10.1081/ma-120037347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Kim YS, Song R, Chung HC, Jun MJ, Sohn YS. Coordination modes vs. antitumor activity: synthesis and antitumor activity of novel platinum(II) complexes of N -substituted amino dicarboxylic acids. J Inorg Biochem 2004; 98:98-104. [PMID: 14659638 DOI: 10.1016/j.jinorgbio.2003.09.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The trans-(+/-)-1,2-diaminocyclohexaneplatinum(II) complexes of multidentate L-glutamate (Glu) and L-aspartate (Asp) were prepared and their antitumor activity was examined in relation with their coordination modes. All these complexes were obtained as a mixture of (O,O')- and (O,N)-chelate isomers due to rapid isomerization of the initially formed (O,O')-isomer to the thermodynamically more stable (O,N)-isomer. The (O,O')/(O,N)-isomeric mixture with the mole ratio of 80/20 exhibited excellent antitumor activity while the pure (O,N)-isomer was only marginally active. Therefore, in order to prevent the linkage isomerization of the active (O,O')-isomer to the inactive (O,N)-isomer, we have designed N-substituted amino dicarboxylic acids as a leaving group and prepared a new series of complexes, [Pt(dach)(RGlu)] and [Pt(dach)(RAsp)] (dach=trans-(+/-)-1,2-diaminocyclohexane; R=acetyl (Ac), propionyl (Pro), pivaloyl (Piv), carbobenzyloxy (Cbz) or phthaloyl (Phth)) and characterized by means of elemental analyses, and 1H NMR, 195Pt NMR and IR spectroscopies. The N-substituted amino dicarboxylate ligands were found to coordinate to platinum(II) ion through only the (O,O')-chelation mode, and their Pt(II) complexes were chemically stable in aqueous solution. The present Pt(II) complexes of N-substituted amino dicarboxylic acids showed excellent antitumor activity against both murine leukemia L1210 and human tumor cells. Especially, the highly hydrophobic N-phthaloylglutamate complex, [Pt(dach)(PhthGlu)], exhibited an outstanding in vitro activity (IC50=2.22 microM) on the human stomach cancer cells which are not responsive to cisplatin and carboplatin.
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Affiliation(s)
- Yeong-Sang Kim
- Department of Chemistry, Ewha Womans University, Seoul 120-750, Republic of Korea
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10
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Kushev D, Gorneva G, Enchev V, Naydenova E, Popova J, Taxirov S, Maneva L, Grancharov K, Spassovska N. Synthesis, cytotoxicity, antibacterial and antitumor activity of platinum(II) complexes of 3-aminocyclohexanespiro-5-hydantoin. J Inorg Biochem 2002; 89:203-11. [PMID: 12062124 DOI: 10.1016/s0162-0134(01)00420-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New platinum(II) complexes of 3-aminocyclohexanespiro-5-hydantoin (achsh) were prepared and characterized. Ab initio calculation of the structure and the measurements of IR and NMR spectra of [Pt(NH(3))(achsh)Cl(2)] were also performed. Quantum-chemical and spectroscopic studies indicated a cis-square planar structure with a hydantoin ligand coordinated via the NH(2) group. The complexes were evaluated for in vitro cytotoxicity in murine erythroleukemia (MEL) cells, clone F4N, as well as for in vivo antitumor activity toward murine L1210 leukemia. The complexes exerted significantly lower in vitro and in vivo toxicities compared with those of cisplatin (cis-diamminedichloroplatinum(II), DDP). The complex [Pt(NH(3))(achsh)Cl(2)] exhibited antitumor activity against L1210 leukemia, comparable to that of cisplatin, resulting at a dose of 72 mg/kg in a %T/C (increased survival time) of 191%. This complex, as well as cisplatin, induced apoptosis in F4N cells, and exerted antibacterial activity as assessed in 10 bacterial strains.
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Affiliation(s)
- Daniel Kushev
- Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. bl. 21, BG-1113 Sofia, Bulgaria
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11
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Kushev D, Gorneva G, Taxirov S, Spassovska N, Grancharov K. Synthesis, cytotoxicity and antitumor activity of platinum(II) complexes of cyclopentanecarboxylic acid hydrazide. Biol Chem 1999; 380:1287-94. [PMID: 10614821 DOI: 10.1515/bc.1999.164] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
New platinum(II) complexes of cyclopentanecarboxylic acid hydrazide (cpcah) were prepared, characterized by elemental analysis, IR and 1H NMR spectra, and evaluated for in vitro cytotoxicity in Friend leukemia (FL) and A2780 ovarian tumor cells, induction of apoptosis in FL cells, as well as for in vivo antitumor activity toward murine L1210 leukemia and Lewis lung carcinoma. The spectral analyses indicated a cis-square planar structure of the complexes with hydrazide ligand coordinated via the NH2 group. The compounds exerted significantly lower in vitro and in vivo toxicities as compared with those of cisplatin (cis-diamminedichloroplatinum(II), DDP). On the other hand, the complex [Pt(NH3)(cpcah)Cl2] exhibited antitumor activity against L1210 leukemia in mice comparable to that of cisplatin, resulting at a dose of 42 mg/kg (administered 3 times) in a T/C (mean survival time) of 280%. This compound displayed an in vitro macromolecular synthesis inhibition pattern similar to that of DDP. At concentrations close to the cytostatic ones (10-20 microM) this complex, as well as DDP, was able to induce apoptosis in FL cells as shown by neutral comet assay and morphological analysis. We concluded that there is a correlation between the ability of platinum complexes to induce apoptosis and their antitumor activity.
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MESH Headings
- Animals
- Antineoplastic Agents/chemical synthesis
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Carboxylic Acids/chemistry
- Carcinoma, Lewis Lung/drug therapy
- Cisplatin/chemistry
- Cisplatin/pharmacology
- DNA, Neoplasm/biosynthesis
- DNA, Neoplasm/drug effects
- Drug Screening Assays, Antitumor
- Female
- Humans
- Inhibitory Concentration 50
- Leukemia L1210/drug therapy
- Leukemia, Erythroblastic, Acute/drug therapy
- Leukemia, Erythroblastic, Acute/genetics
- Leukemia, Erythroblastic, Acute/metabolism
- Magnetic Resonance Spectroscopy
- Mice
- Mice, Inbred Strains
- Organoplatinum Compounds/chemical synthesis
- Organoplatinum Compounds/chemistry
- Organoplatinum Compounds/pharmacology
- Ovarian Neoplasms/drug therapy
- Ovarian Neoplasms/pathology
- Protein Biosynthesis
- Proteins/drug effects
- Spectrophotometry, Infrared
- Structure-Activity Relationship
- Tumor Cells, Cultured
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Affiliation(s)
- D Kushev
- Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia
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12
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Amo-Ochoa P, González VM, Pérez JM, Masaguer JR, Alonso C, Navarro-Ranninger C. Cytotoxicity, DNA binding, and reactivity against nucleosides of platinum (II) and (IV) spermine compounds. J Inorg Biochem 1996; 64:287-99. [PMID: 8916415 DOI: 10.1016/s0162-0134(96)00082-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We describe the synthesis and characterization of a [sperH4][PtCl4]2 salt and of five binuclear platinum (II) and (IV)-spermine compounds of formula [(PtCl2)2(sper)], cis-[(Pt(CH2(COO)2)2(sper)], cis-[(PtCBDCA)2(sper)], (CBDCA = 1,1'-cyclobutanedicarboxylate), cis-trans-cis[(PtCl2(OH)2)2(sper)], and cis-[(PtCl4)2(sper)], respectively. The 1H and 195Pt-NMR analysis of the complexes formed between these compounds and nucleosides indicated that the Pt centers show preferential binding to the N(7) of guanosine and adenosine residues, also being capable of forming bridged structures through the N(7) and N(1). The synthesized Pt-spermine compounds do not form complexes with cytidine residues at 37 degrees C. The circular dichroism, melting, and electrophoretic data of the compounds-DNA complexes show that the Pt(IV)-spermine complexes induce lower DNA conformational changes than their Pt(II) analogs. These results correlate with the IC50 values obtained against MDA-MB 468 and HL-60 human cancer cells which are higher than those of cis-DDP. The [sperH4][PtCl4]2 salt produces a high level of DNA modification and exhibits IC50 values lower than those of cis-DDP.
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Affiliation(s)
- P Amo-Ochoa
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Spain
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13
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Dodoff N, Grancharov K, Spassovska N. Platinum(II) complexes of 4-methoxy- and 4-chlorobenzoic acid hydrazides. Synthesis, characterization, and cytotoxic effect. J Inorg Biochem 1995; 60:257-66. [PMID: 8530921 DOI: 10.1016/0162-0134(95)00025-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The complexes [Pt(NH3)(pmbah)Cl2], [Pt(NH3)(pcbah)Cl2], [Pt(pmbah)2X2] and [Pt(pcbah)2X2] (pmbah = 4-methoxybenzoic acid hydrazide, pcbah = 4-chlorobenzoic acid hydrazide; X = Cl, Br, I) have been synthesized and characterized by elemental analysis, electric conductivity, 1H NMR, IR, and electronic spectra. A cis-square planar structure with hydrazide ligands coordinated via the NH2 groups has been proposed for these compounds. The complexes, but not the free ligands, have shown a strong growth inhibitory effect in Friend leukemia cells in vitro, most of which are more active than cisplatin.
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Affiliation(s)
- N Dodoff
- Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia, Bulgaria
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14
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Dodoff N, Grancharov K, Gugova R, Spassovska N. Platinum (II) complexes of benzoic- and 3-methoxybenzoic acid hydrazides. Synthesis, characterization, and cytotoxic effect. J Inorg Biochem 1994; 54:221-33. [PMID: 8027743 DOI: 10.1016/0162-0134(94)80015-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The complexes [Pt(bah)2X2], [Pt(NH3)(bah)Cl2].0.5H2O, [Pt(mbah)2X2], and [Pt(NH3)(mbah)Cl2] (bah = benzoic acid hydrazide, mbah = 3-methoxybenzoic acid hydrazide; X = Cl, Br, I) have been prepared and characterized by elemental analysis, electric conductivity, IR, 1H NMR, and electronic spectra. A cis-square planar structure with hydrazide ligands coordinated via the NH2-groups has been proposed for these complexes. The complexes have shown a growth-inhibitory effect against Friend leukemia cells in culture comparable to that of the antitumor drug cisplatin.
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Affiliation(s)
- N Dodoff
- Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia
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15
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Shenberg C, Boazi M, Cohen J, Klein A, Kojler M, Nyska A. An XRF study of trace elements accumulation in kidneys of tumor-bearing mice after treatment with cis-DDP with and without selenite and selenocistamine. Biol Trace Elem Res 1994; 40:137-49. [PMID: 7514019 DOI: 10.1007/bf02950787] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The effect of cis-DDP treatment with and without selenite and selenocistamine was studied on kidneys of tumor-bearing mice. The amounts of cis-DDP, selenite, and selenocistamine injected were chosen so as to be compatible with the treatment of humans. The animals were sacrificed at 7, 14, and 28 d after treatment. The kidneys were removed and subjected to trace element analysis by a novel X-ray fluorescence (XRF) method and for pathological assessment. The results show that following treatment with cis-DDP, K, Fe, Cu, and Zn reach a maximum level after 7 d; K, Fe, and Cu levels were significantly reduced by the addition of selenite. The level of Zn was reduced only in groups treated with selenite whereas that of K and Cu was reduced also in groups treated with selenocistamine with and without cis-DDP. The greatest increase in Pt and Se levels was reached 1 wk after injection with cis-DDP, with and without selenocompounds, and in the case of Pt was partly reduced by addition of selenite. Se returned to control values 2 wk after injection, although Pt was still high in all groups 2 and 4 wk after injection. The results corroborate the findings of our previous studies. The effect of selenocistamine in cis-DDP treated mice was partly insufficient. The pathological examination of the kidneys did not show any differences in the effect of various additives during the study.
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Affiliation(s)
- C Shenberg
- Soreq Nuclear Research Centre, Yavne, Israel
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16
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Pasini A, Caldiroia C, Spinelli S, Valsecchi M. Comments on Different Synthetic Methods for the Preparation of Diammine and bis(Amine) Organodicarboxylatoplatinum(II) Complexes. ACTA ACUST UNITED AC 1993. [DOI: 10.1080/15533179308016879] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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