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Melones-Herrero J, Alcalá S, Ruiz-Cañas L, Benítez-Buelga C, Batres-Ramos S, Calés C, Lorenzo O, Perona R, Quiroga AG, Sainz B, Sánchez-Pérez I. Platinum iodido drugs show potential anti-tumor activity, affecting cancer cell metabolism and inducing ROS and senescence in gastrointestinal cancer cells. Commun Biol 2024; 7:353. [PMID: 38519773 PMCID: PMC10959927 DOI: 10.1038/s42003-024-06052-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 03/14/2024] [Indexed: 03/25/2024] Open
Abstract
Cisplatin-based chemotherapy has associated clinical disadvantages, such as high toxicity and resistance. Thus, the development of new antitumor metallodrugs able to overcome different clinical barriers is a public healthcare priority. Here, we studied the mechanism of action of the isomers trans and cis-[PtI2(isopropylamine)2] (I5 and I6, respectively) against gastrointestinal cancer cells. We demonstrate that I5 and I6 modulate mitochondrial metabolism, decreasing OXPHOS activity and negatively affecting ATP-linked oxygen consumption rate. Consequently, I5 and I6 generated Reactive Oxygen Species (ROS), provoking oxidative damage and eventually the induction of senescence. Thus, herein we propose a loop with three interconnected processes modulated by these iodido agents: (i) mitochondrial dysfunction and metabolic disruptions; (ii) ROS generation and oxidative damage; and (iii) cellular senescence. Functionally, I5 reduces cancer cell clonogenicity and tumor growth in a pancreatic xenograft model without systemic toxicity, highlighting a potential anticancer complex that warrants additional pre-clinical studies.
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Affiliation(s)
- Jorge Melones-Herrero
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Sonia Alcalá
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Laura Ruiz-Cañas
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Carlos Benítez-Buelga
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
| | - Sandra Batres-Ramos
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Carmela Calés
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
| | - Oscar Lorenzo
- Laboratory of Diabetes and Vascular Pathology, Instituto de Investigaciones Sanitarias-Fundación Jimenez Díaz, CIBERDEM, UAM, Madrid, Spain
| | - Rosario Perona
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Centro de Investigación Biomédica en Red, Área Rare Diseases, CIBERER, ISCIII, Madrid, Spain
- Instituto de Salud Carlos III, Madrid, Spain
| | - Adoración G Quiroga
- Department of Inorganic Chemistry, School of Sciences, IAdChem, UAM, Madrid, Spain
| | - Bruno Sainz
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain.
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
- Centro de Investigación Biomédica en Red, Área Cáncer, CIBERONC, ISCIII, Madrid, Spain.
| | - Isabel Sánchez-Pérez
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain.
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain.
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
- Centro de Investigación Biomédica en Red, Área Rare Diseases, CIBERER, ISCIII, Madrid, Spain.
- Unidad Asociada de Biomedicina UCLM-CSIC, Madrid, Spain.
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Herrero JM, Fabra D, Matesanz AI, Hernández C, Sánchez-Pérez I, Quiroga AG. Dithiobiureas Palladium(II) complexes' studies: From their synthesis to their biological action. J Inorg Biochem 2023; 246:112261. [PMID: 37271620 DOI: 10.1016/j.jinorgbio.2023.112261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/09/2023] [Accepted: 05/18/2023] [Indexed: 06/06/2023]
Abstract
Dithiobiureas coordination chemistry towards palladium (II) ions and their possible application is presented and discussed. 1,6-(4-Methoxyphenyl)-2,5-dithiobiurea and 1,6-(4-chlorophenyl)-2,5-dithiobiurea afford two Pd(II) complexes with the general formula [Pd2(H2L)Cl2(PPh3)2]. The metal ion forms one chelate ring with the dithiobiurea, and binds to a triphenylphosphine and an additional leaving group cisplatin like. One of the complexes (1) is endowed not only with stability in DMSO and aqua solutions containing a biological buffer but also with cytotoxicity versus gastric cancer cell lines. Complex 1 does not interact covalently to DNA models, neither activates p53 or Checkpoint Kinase 1 key proteins for DNA damage response. Thus, we propose that complex 1 exerts its action by activating Mitogen-Activated Protein Kinases [p38, Extracellular signal-regulated kinases (ERKs), c-Jun N-terminal kinases (JNKs)] as cell death inductors.
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Affiliation(s)
- Jorge M Herrero
- Departamento de Bioquímica, Facultad de Medicina and Instituto de Investigaciones Biomédicas Albert Sols, Universidad Autónoma de Madrid, 28029 Madrid, Spain; Cancer Stem Cell and Fibroinflammatory Microenvironment Group, Chronic Diseases and Cancer Area 3 -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - David Fabra
- Departamento de Química Inorgánica, Facultad de Ciencias and IadChem, Calle Francisco Tomas y Valiente 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Ana I Matesanz
- Departamento de Química Inorgánica, Facultad de Ciencias and IadChem, Calle Francisco Tomas y Valiente 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Carolina Hernández
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias del Medio Ambiente, Avd. Carlos III s/n, Universidad de Castilla-La Mancha, 45071 Toledo, Spain
| | - Isabel Sánchez-Pérez
- Departamento de Bioquímica, Facultad de Medicina and Instituto de Investigaciones Biomédicas Albert Sols, Universidad Autónoma de Madrid, 28029 Madrid, Spain; Cancer Stem Cell and Fibroinflammatory Microenvironment Group, Chronic Diseases and Cancer Area 3 -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
| | - Adoracion G Quiroga
- Departamento de Química Inorgánica, Facultad de Ciencias and IadChem, Calle Francisco Tomas y Valiente 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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D'Errico S, Falanga AP, Greco F, Piccialli G, Oliviero G, Borbone N. State of art in the chemistry of nucleoside-based Pt(II) complexes. Bioorg Chem 2023; 131:106325. [PMID: 36577221 DOI: 10.1016/j.bioorg.2022.106325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/22/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
After the fortuitous discovery of the anticancer properties of cisplatin, many Pt(II) complexes have been synthesized, to obtain less toxic leads which could overcome the resistance phenomena. Given the importance of nucleosides and nucleotides as antimetabolites, studying their coordinating properties towards Pt(II) ions is challenging for bioorganic and medicinal chemistry. This review aims to describe the results achieved so far in the aforementioned field, paying particular attention to the synthetic aspects, the chemical-physical characterization, and the biological activities of the nucleoside-based Pt(II) complexes.
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Affiliation(s)
- Stefano D'Errico
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano, 49, 80131 Naples, Italy.
| | - Andrea Patrizia Falanga
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano, 49, 80131 Naples, Italy.
| | - Francesca Greco
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano, 49, 80131 Naples, Italy.
| | - Gennaro Piccialli
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano, 49, 80131 Naples, Italy.
| | - Giorgia Oliviero
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, via Sergio Pansini, 5, 80131 Naples, Italy.
| | - Nicola Borbone
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano, 49, 80131 Naples, Italy.
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Platinum(IV) Complexes of the 1,3,5-Triamino Analogue of the Biomolecule Cis-Inositol Designed as Innovative Antineoplastic Drug Candidates. Pharmaceutics 2022; 14:pharmaceutics14102057. [PMID: 36297500 PMCID: PMC9611922 DOI: 10.3390/pharmaceutics14102057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/16/2022] [Accepted: 09/22/2022] [Indexed: 02/01/2023] Open
Abstract
Metal complexes occupy a special place in the field of treatment and diagnostics. Their main advantages stem from the possibility of fine-tuning their thermodynamic properties and kinetic behavior in the biological milieu by applying different approaches such as properly constructed inner coordination sphere, appropriate choice of ligands, metal oxidation state, redox potential, etc., which are specific to these compounds. Here we discuss the design and synthesis of two octahedral cationic Pt(IV) complexes of the tridentate ligand all-cis-2,4,6-triaminocyclohexane-1,3,5-triol (taci) with composition, fac-[Pt(taci)I3]+, 1 and bis-[Pt(taci)2]4+, 2 as well as the potential for their application as antineoplastic agents. The complexes have been isolated in a solid state as: fac-[Pt(taci)I3]I·3H2O (1A), fac-[Pt(taci)I3]I (1B), fac-[Pt(taci)I3]I·2DMF (1C), bis-[Pt(taci)2](CO3)2·6H2O (2A) by changing the acidity of the reaction systems, the molar ratios of the reagents and the counterions, and by re-crystallization. The ligand taci is coordinated through the NH2-groups, each molecule occupying three coordination places in the inner coordination sphere of Pt(IV). Monitoring of the hydrolysis processes of 1A and 2A at different acidity showed that while 2A remained stable over the study period, the I−-ions in 1A were successively substituted, with the main product under physiologically mimetic conditions being fac,cis-[Pt(taci)I(OH)2]+ (h2). The antiproliferative tests involved eight cancer cell models, among which chemosensitive (derived from leukemias and solid tumors) and chemoresistant human Acute myeloid leukemia lines (HL-60/Dox, HL-60/CDDP), as well as the non-malignant kidney’ cells HEK-293T showed that the complexes 1A and 2A are characterized by a fundamentally different profile of chemosensitivity and spectrum of cytotoxic activity compared to cisplatin. The new Pt(IV) complexes were shown to be more effective in selectively inhibiting the proliferation of human malignant cells compared to cisplatin. Remarkable activity was recorded for 1A, which showed an effect (IC50 = 8.9 ± 2.4) at more than 16-fold lower concentration than cisplatin (IC50 = 144.4 ± 9.8) against the resistant cell line HL-60/CDDP. In parallel, 1A exhibited virtually the same cytotoxic effect against the parental HL-60 cells (IC50 = 9.0 ± 1.2), where cisplatin displays comparable chemosensitivity (IC50 = 8.3 ± 0.8). The determined resistance indices (RI~1) show unequivocally that the resistant lines are sensitive to both compounds tested; therefore, they are capable of overcoming the mechanisms of cisplatin resistance. The structural features of these compounds and their promising pharmacological properties justify their inclusion in the group of “non-classical metal-based antitumor compounds” and are a prerequisite for the admission of alternative mechanisms of action.
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Ming J, Bhatti MZ, Ali A, Zhang Z, Wang N, Mohyuddin A, Chen J, Zhang Y, Rahman FU. Vitamin B6 based Pt(II) complexes: Biomolecule derived potential cytotoxic agents for thyroid cancer. METALLOMICS : INTEGRATED BIOMETAL SCIENCE 2022; 14:6649654. [PMID: 35876659 DOI: 10.1093/mtomcs/mfac053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 07/20/2022] [Indexed: 11/14/2022]
Abstract
Vitamin B6 is an essential vitamin that serves as a co-enzyme in a number of enzymatic reactions in metabolism of lipids, amino acids and glucose. In the current study, we synthesized vitamin B6 derived ligand (L) and its complex Pt(L)Cl (C1). The ancillary chloride ligand of C1 was exchanged with pyridine co-ligand and another complex Pt(L)(py).BF4 (C2) was obtained. Both these complexes were obtained in excellent isolated yields and characterized thoroughly by different analytical methods. Thyroid cancer is one of the most common malignancies of the endocrine system, we studied the in vitro anticancer activity and mechanism of these vitamin B6 derived L and Pt(II) complexes in thyroid cancer cell line (FTC). Based on MTT assay, cell proliferation rate was reduced in a dose-dependent manner. According to apoptosis analysis, vitamin B6 based Pt(II) complexes treated cells depicted necrotic effect and TUNEL based apoptosis was observed in cancer cells. Furthermore, qRT-PCR analyses of cancer cells treated with C1 and/or C2 showed regulated expression of anti-apoptotic, pro-apoptosis and autophagy related genes. Western blot results demonstrated that C1 and C2 induced the activation of p53 and the cleavage of Poly (ADP-ribose) polymerase (PARP). These results suggest that these complexes inhibit the growth of FTC cells and induce apoptosis through p53 signaling. Thus, vitamin B6 derived Pt(II) complexes C1 and C2 may be potential cytotoxic agents for the treatment of thyroid cancer.
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Affiliation(s)
- Jialin Ming
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot People's Republic of China, Inner Mongolia 010031, China
| | - Muhammad Zeeshan Bhatti
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - Amjad Ali
- Institute of Integrative Biosciences, CECOS University of IT and Emerging Sciences, Peshawar, KPK 25000, Pakistan
| | - Zeqing Zhang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot People's Republic of China, Inner Mongolia 010031, China
| | - Na Wang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot People's Republic of China, Inner Mongolia 010031, China
| | - Aisha Mohyuddin
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - Jiwu Chen
- School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Yongmin Zhang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot People's Republic of China, Inner Mongolia 010031, China
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 Place Jussieu, 75005 Paris, France
| | - Faiz-Ur Rahman
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot People's Republic of China, Inner Mongolia 010031, China
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Bai X, Ali A, Wang N, Liu Z, Lv Z, Zhang Z, Zhao X, Hao H, Zhang Y, Rahman FU. Inhibition of SREBP-mediated lipid biosynthesis and activation of multiple anticancer mechanisms by platinum complexes: Ascribe possibilities of new antitumor strategies. Eur J Med Chem 2022; 227:113920. [PMID: 34742012 DOI: 10.1016/j.ejmech.2021.113920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/04/2021] [Accepted: 10/11/2021] [Indexed: 12/31/2022]
Abstract
Cancer is one of the most aggressive diseases with poor prognosis and survival rates. Lipids biogenesis play key role in cancer progression, metastasis and tumor development. Suppression of SREBP-mediated lipid biogenesis pathway has been linked with cancer inhibition. Platinum complexes bearing good anticancer effect and multiple genes activation properties are considered important and increase the chances for development of new platinum-based drugs. In this study, we synthesized pyridine co-ligand functionalized cationic complexes and characterized them using multiple spectroscopic and spectrophotometric methods. Two of these complexes were studied in solid state by single crystal X-ray analysis. The stability of these complexes were measured in solution state using 1H NMR methods. These complexes were further investigated for their anticancer activity against human breast, lung and liver cancer cells. MTT assay showed potential cytotoxic activity in dose-dependent manner and decrease survival rates of cancer cells was observed upon treatment with these complexes. Biological assays results revealed higher cytotoxicity as compared to cisplatin and oxaliplatin. Further we studied C2, C6 and C8 in detailed mechanistic anticancer analyses. Clonogenic assay showed decrease survival of MCF-7, HepG2 and A549 cancer cells treated with C2, C6 and C8 as compared to control cells treated with DMSO. TUNEL assay showed more cell death, these complexes suppressed invasion and migration ability of cancer cells and decreased tumor spheroids formation, thus suggesting a potential role in inhibition of cancer metastasis and cancer stem cells formation. Mechanistically, these complexes inhibited sterol regulatory element-binding protein 1 (SREBP-1) expression in cancer cells in dose-dependent manner and thereby reduced lipid biogenesis to suppress cancer progression. Furthermore, expression level was decreased for the key genes LDLR, FASN and HMGCR, those required for sterol biosynthesis. Taken together, these complexes suppressed cancer cell growth, migration, invasion and spheroids formation by inhibiting SREBP-1 mediated lipid biogenesis pathway.
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Affiliation(s)
- Xue Bai
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Amjad Ali
- Institute of Integrative Biosciences, CECOS University of IT and Emerging Sciences, Peshawar, KPK, Pakistan; Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People's Republic of China
| | - Na Wang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Zongwei Liu
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Zhimin Lv
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Zeqing Zhang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Xing Zhao
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Huifang Hao
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China; School of Life Sciences, Inner Mongolia University, Hohhot, 010021, People's Republic of China
| | - Yongmin Zhang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China; Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 Place Jussieu, 75005, Paris, France.
| | - Faiz-Ur Rahman
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
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Lord RM, Zegke M, Basri AM, Pask CM, McGowan PC. Rhodium(III) Dihalido Complexes: The Effect of Ligand Substitution and Halido Coordination on Increasing Cancer Cell Potency. Inorg Chem 2021; 60:2076-2086. [PMID: 33463147 DOI: 10.1021/acs.inorgchem.0c03704] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This work presents the synthesis of eight new rhodium(III) dihalido complexes, [RhX2(L)(LH)] (where X = Cl or I), which incorporate two bidentate N-(3-halidophenyl)picolinamide ligands. The ligands have different binding modes in the complexes, whereby one is neutral and bound via N,N (LH) coordination, while the other is anionic and bound via N,O (L) coordination. The solid state and solution studies confirm multiple isomers are present when X = Cl; however, after a halide exchange with potassium iodide (X = I) the complexes exist exclusively as single stable trans isomers. NMR studies reveal the Rh(III) trans diiodido complexes remain stable in aqueous solution with no ligand exchange reported over 96 h. Chemosensitivity data against a range of cancer cell lines show two cytotoxic complexes, where L = N-(3-bromophenyl)picolinamide ligand. The results have been compared to the analogous Ru(III) complexes and overall highlight the Rh(III) trans diiodido complex to be ∼78× more cytotoxic than the analogous Rh(III) dichlorido complex, unlike the Ru(III) complexes which are equitoxic against all cell lines. Additionally, the Rh(III) trans diiodido complex is more selective toward cancerous cells, with selectivity index (SI) values >25-fold higher than cisplatin against colorectal carcinoma.
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Affiliation(s)
- Rianne M Lord
- School of Chemistry, University of East Anglia, Norwich NR4 7JT, U.K
- School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, U.K
| | - Markus Zegke
- School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, U.K
| | - Aida M Basri
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
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Tseng KH, Lin ZY, Chung MY, Tien DC, Stobinski L. Parameter control and property analysis in the preparation of platinum iodide nanocolloids through the electrical spark discharge method. RSC Adv 2020; 10:30169-30175. [PMID: 35518241 PMCID: PMC9058553 DOI: 10.1039/d0ra04048g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/10/2020] [Indexed: 11/21/2022] Open
Abstract
This study employed the electrical spark discharge method to prepare platinum iodide nanocolloids at normal temperature and pressure. Wires composed of 99.5% platinum were applied as the electrodes, and 250 ppm liquid iodine was employed as the dielectric fluid. An electric discharge machine was applied to generate cyclic direct current pulse power between the electrodes. Five sets of turn-on and turn-off time (T on-T off) parameters, namely 10-10, 30-30, 50-50, 70-70, and 90-90 μs, were implemented to identify the optimal nanocolloid preparation conditions. An ultraviolet-visible spectroscope, a Zetasizer, and a transmission electron microscope were used to examine the nanocolloids' properties. The results revealed that the T on-T off parameter set of 10-10 μs was the most ideal setting for platinum iodide nanocolloid preparation. With this parameter set, the characteristic wavelengths of the nanocolloid were 285 and 350 nm, respectively; its absorbance values were 0.481 and 0.425, respectively; and its zeta potential and particle size were -30.3 mV and 61.88 nm, respectively. This parameter set yielded maximized absorbance, satisfactory suspension stability, and minimized nanoparticle sizes for the nanocolloid.
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Affiliation(s)
- Kuo-Hsiung Tseng
- Department of Electrical Engineering, National Taipei University of Technology Taiwan Republic of China
| | - Zih-Yuan Lin
- Department of Electrical Engineering, National Taipei University of Technology Taiwan Republic of China
| | - Meng-Yun Chung
- Department of Electrical Engineering, National Taipei University of Technology Taiwan Republic of China
| | - Der-Chi Tien
- Department of Electrical Engineering, National Taipei University of Technology Taiwan Republic of China
| | - Leszek Stobinski
- Materials Chemistry, Warsaw University of Technology Warynskiego 1 00-645 Warsaw Poland
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