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Cisplatin is retained in the cochlea indefinitely following chemotherapy. Nat Commun 2017; 8:1654. [PMID: 29162831 PMCID: PMC5698400 DOI: 10.1038/s41467-017-01837-1] [Citation(s) in RCA: 226] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/19/2017] [Indexed: 11/15/2022] Open
Abstract
Cisplatin chemotherapy causes permanent hearing loss in 40–80% of treated patients. It is unclear whether the cochlea has unique sensitivity to cisplatin or is exposed to higher levels of the drug. Here we use inductively coupled plasma mass spectrometry (ICP-MS) to examine cisplatin pharmacokinetics in the cochleae of mice and humans. In most organs cisplatin is detected within one hour after injection, and is eliminated over the following days to weeks. In contrast, the cochlea retains cisplatin for months to years after treatment in both mice and humans. Using laser ablation coupled to ICP-MS, we map cisplatin distribution within the human cochlea. Cisplatin accumulation is consistently high in the stria vascularis, the region of the cochlea that maintains the ionic composition of endolymph. Our results demonstrate long-term retention of cisplatin in the human cochlea, and they point to the stria vascularis as an important therapeutic target for preventing cisplatin ototoxicity. Permanent hearing loss occurs in many cancer patients treated with cisplatin. In this study, the authors examine cisplatin pharmacokinetics in the cochleae of mice and humans showing that cisplatin is retained for months to years after treatment.
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Yin S, Chen X, Xie H, Zhou L, Guo D, Xu Y, Wu L, Zheng S. Nanosecond pulsed electric field (nsPEF) enhance cytotoxicity of cisplatin to hepatocellular cells by microdomain disruption on plasma membrane. Exp Cell Res 2016; 346:233-40. [PMID: 27375200 DOI: 10.1016/j.yexcr.2016.06.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/11/2016] [Accepted: 06/24/2016] [Indexed: 12/21/2022]
Abstract
Previous studies showed nanosecond pulsed electric field (nsPEF) can ablate solid tumors including hepatocellular carcinoma (HCC) but its effect on cell membrane is not fully understood. We hypothesized nsPEF disrupt the microdomains on outer-cellular membrane with direct mechanical force and as a result the plasma membrane permeability increases to facilitate the small molecule intake. Three HCC cells were pulsed one pulse per minute, an interval longer than nanopore resealing time. The cationized ferritin was used to mark up the electronegative microdomains, propidium iodide (PI) for membrane permeabilization, energy dispersive X-ray spectroscopy (EDS) for the negative cell surface charge and cisplatin for inner-cellular cytotoxicity. We demonstrated that the ferritin marked-microdomain and negative cell surface charge were disrupted by nsPEF caused-mechanical force. The cell uptake of propidium and cytotoxicity of DNA-targeted cisplatin increased with a dose effect. Cisplatin gains its maximum inner-cellular cytotoxicity when combining with nsPEF stimulation. We conclude that nsPEF disrupt the microdomains on the outer cellular membrane directly and increase the membrane permeabilization for PI and cisplatin. The microdomain disruption and membrane infiltration changes are caused by the mechanical force from the changes of negative cell surface charge.
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Affiliation(s)
- Shengyong Yin
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Xinhua Chen
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Haiyang Xie
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Lin Zhou
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Danjing Guo
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Yuning Xu
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - Liming Wu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China.
| | - Shusen Zheng
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, 310003 Hangzhou, China; Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health and Key Laboratory of Organ Transplantation of Zhejiang Province, The Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China.
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Razaka H, Wimmer F, Wimmer S, Villani G, Johnson NP. Toxicity, mutagenicity, intracellular drug concentration and DNA binding in Escherichia coli treated with cis-platinum(II) complexes. Chem Biol Interact 1987; 61:265-75. [PMID: 3552271 DOI: 10.1016/0009-2797(87)90006-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The genotoxic effects of six cis-platinum(II)chloramine complexes with different alkyl substituents on their amine ligands have been measured using Escherichia coli. The toxicity and mutagenicity of these compounds were compared, after exposure of bacteria, to drug concentrations which gave known quantities of platinum-DNA lesions. The results permit several observations concerning structure-activity relations of platinum(II) complexes. Firstly, methyl substitution on the amine ligands of cis-diamminedichloro-platinum(II) (DDP) is reported to reduce its antitumor activity. The methyl group did not exert an effect in bacteria where the toxicity and mutagenicity of cis-bis(methylamine)dichloroplatinum(II) and DDP were equivalent. In fact, at equal levels of DNA binding, complexes with substituted amines were generally more toxic toward bacteria than DDP. Secondly, replacement of the chloro groups of DDP by nitrato ligands increased its toxicity and mutagenicity at a given level of DNA binding. Hence, although DDP and its dinitrato derivative have identical ammine ligands, they may form different platinum-DNA lesions in bacteria. Finally, cis-bis(cyclohexylamine)-dichloroplatinum(II) was unique among the compounds studied since it did not cause bacterial filamentation or mutagenesis. These results suggest that, although this compound binds to the bacterial genome, it may not induce the SOS response.
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Macquet JP, Butour JL. A circular dichroism study of DNA.platinum complexes. Differentiation between monofunctional, cis-bidentate and trans-bidentate platinum fixation on a series of DNAs. EUROPEAN JOURNAL OF BIOCHEMISTRY 1978; 83:375-85. [PMID: 631125 DOI: 10.1111/j.1432-1033.1978.tb12103.x] [Citation(s) in RCA: 110] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The circular dichroism (CD) spectra of a series of DNA . platinum complexes are presented. The following platinum compounds, [Pt(dien)Cl]Cl, cis-Pt(NH3)2Cl2, cis-Pt(en)Cl2, trans-Pt-(NH3)2Cl2, K[Pt(NH3)Cl3] and K2[PtCl4] were complexed with the DNA extracted from bacteria Micrococcus lysodeikticus (72% dG + dC), Escherichia coli (50% dG + dC), Clostridium perfringens (32% dG + dC) and salmon sperm (41% dG + dC). Strong differences were found between the different DNA . Pt complexes. Three types of spectra clearly demonstrate the different platinum binding modes on DNA. In the first type, the platinum compound, i.e. [Pt(dien)Cl]Cl, is fixed to DNA with only one bond (monofunctional complex formation) and no significant change of the CD positive band of DNA is found. The main feature of the second type is a continuous intensity decrease of the positive band as observed for trans-Pt(NH3)2Cl2 (trans-bidentate complex formation). The third type concerns the cis-bidentate platinum fixation obtained with cis-Pt(NH3)2Cl2, cis-Pt(en)Cl2, K[Pt(NH3)Cl3] and K2[PtCl4]. The CD spectra are in this case characterized by an increase in the positive Cotton effect which is dG + dC-dependent up to an rb value around 0.10 (where rb = number of platinum atoms bound per nucleotide), followed by a decrease until DNA saturation with platinum is reached. A linear decrease in the amplitude of the negative band is detected in all the complexes except in the case of the monofunctional DNA . Pt complexes. For the cis-bidentate and trans-bidentate platinum fixation, a continuous bathochromic shift occurs.
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Whiting RF, Ottensmeyer FP. Platinum - dimethylsulphoxide as a specific nucleic acid reagent for base sequence determination by electron microscopy. BIOCHIMICA ET BIOPHYSICA ACTA 1977; 474:334-8. [PMID: 831822 DOI: 10.1016/0005-2787(77)90264-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The reaction of platinum (II) - dimethylsulphoxide complex with the bases of the nucleic acids were investigated with a new towards their use as heavy atom markers for base sequence determination by electron microscopy. Both at pH 6.0 and pH 7.5 one platinum atom was bound simultaneously to the pyrimidines and two to adenine, while at the lower pH one platinum, and at the higher pH, two platinum atoms were bound to guanine. The stain therefore appears to be useful to determine the guanine and adenine sequence in single strands of RNA and DNA. Where complementary strands are available the complete sequence determination of all four bases should be possible.
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