1
|
Shen GN, Li J, Jin YH, Sun HN, Hao YY, Jin MH, Liu R, Li WL, Zhang YQ, Yu JB, Yu NN, Wang WD, Yu LY, Kim JS, Kwon T, Han YH. The compound 2-benzylthio-5,8-dimethoxynaphthalene-1,4-dione leads to apoptotic cell death by increasing the cellular reactive oxygen species levels in Ras-mutated liver cancer cells. Exp Ther Med 2020; 20:82. [PMID: 32968439 PMCID: PMC7500053 DOI: 10.3892/etm.2020.9209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 07/07/2020] [Indexed: 12/11/2022] Open
Abstract
The aim of the present study was to verify the pro-apoptotic anticancer potential of several 5,8-dimethoxy-1,4-phthoquinone (DMNQ) derivatives in Ras-mediated tumorigenesis. MTT assays were used to detect cellular viability and flow cytometry was performed to assess intracellular reactive oxygen species (ROS) levels and apoptosis. The expression levels of proteins were detected via western blotting. Among the 12 newly synthesized DMNQ derivatives, 2-benzylthio-5,8-dimethoxynaphthalene-1,4-dione (BZNQ; component #1) significantly reduced cell viability both in mouse NIH3T3 embryonic fibroblasts cells (NC) and H-RasG12V transfected mouse NIH3T3 embryonic fibroblasts cells (NR). Moreover, BZNQ resulted in increased cytotoxic sensitivity in Ras-mutant transfected cells. Furthermore, the reactive oxygen species (ROS) levels in H-RasG12V transfected HepG2 liver cancer cells (HR) were significantly higher compared with the levels in HepG2 liver cancer cells (HC) following BZNQ treatment, which further resulted in increased cellular apoptosis. Eliminating cellular ROS using an ROS scavenger N-acetyl-L-cysteine markedly reversed BZNQ-induced cellular ROS accumulation and cell apoptosis in HC and HR cells. Western blotting results revealed that BZNQ significantly downregulated H-Ras protein expression and inhibited the Ras-mediated downstream signaling pathways such as protein kinase B, extracellular signal-related kinase and glycogen synthase kinase phosphorylation and β-catenin protein expression. These results indicated that the novel DMNQ derivative BZNQ may be a therapeutic drug for Ras-mediated liver tumorigenesis. The results of the current study suggest that BZNQ exerts its effect by downregulating H-Ras protein expression and Ras-mediated signaling pathways.
Collapse
Affiliation(s)
- Gui-Nan Shen
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Jing Li
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Ying-Hua Jin
- Library and Information Center, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Hu-Nan Sun
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Ying-Ying Hao
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Mei-Hua Jin
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Ren Liu
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Wei-Long Li
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Yong-Qing Zhang
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Jia-Bin Yu
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Nan-Nan Yu
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Wei-Dong Wang
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Li-Yun Yu
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| | - Ji-Su Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Jeonbuk 56216, Republic of Korea
| | - Taeho Kwon
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Jeonbuk 56216, Republic of Korea
| | - Ying-Hao Han
- College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, P.R. China
| |
Collapse
|
2
|
Kürschner M, Nielsen K, von Langen JR, Schenk WA, Zimmermann U, Sukhorukov VL. Effect of fluorine substitution on the interaction of lipophilic ions with the plasma membrane of mammalian cells. Biophys J 2000; 79:1490-7. [PMID: 10969010 PMCID: PMC1301042 DOI: 10.1016/s0006-3495(00)76400-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The effects of the anionic tungsten carbonyl complex [W(CO)(5)SC(6)H(5)](-) and its fluorinated analog [W(CO)(5)SC(6)F(5)](-) on the electrical properties of the plasma membrane of mouse myeloma cells were studied by the single-cell electrorotation technique. At micromolar concentrations, both compounds gave rise to an additional antifield peak in the rotational spectra of cells, indicating that the plasma membrane displayed a strong dielectric dispersion. This means that both tungsten derivatives act as lipophilic ions that are able to introduce large amounts of mobile charges into the plasma membrane. The analysis of the rotational spectra allowed the evaluation not only of the passive electric properties of the plasma membrane and cytoplasm, but also of the ion transport parameters, such as the surface concentration, partition coefficient, and translocation rate constant of the lipophilic anions dissolved in the plasma membrane. Comparison of the membrane transport parameters for the two anions showed that the fluorine-substituted analog was more lipophilic, but its translocation across the plasma membrane was slower by at least one order of magnitude than that of the parent hydrogenated anion.
Collapse
Affiliation(s)
- M Kürschner
- Lehrstuhl für Biotechnologie, Biozentrum and Institut für Anorganische Chemie der Universität Würzburg, D-97074 Würzburg, Germany
| | | | | | | | | | | |
Collapse
|
3
|
VanUffelen BE, VanSteveninck J, Elferink JG. Potentiation and inhibition of fMLP-activated exocytosis in neutrophils by exogenous nitric oxide. IMMUNOPHARMACOLOGY 1997; 37:257-67. [PMID: 9403345 DOI: 10.1016/s0162-3109(97)00072-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Exogenous nitric oxide (NO), not derived from NO-donors, but applied directly, could enhance exocytosis of rabbit peritoneal neutrophils induced by suboptimal concentrations of the chemotactic peptide fMLP. The enhancement was maximal at 30 microM NO. Higher concentrations of NO strongly inhibited fMLP-induced exocytosis. The potentiation of fMLP-induced exocytosis by NO could not be reversed by the inhibitors of guanosine-3',5'-cyclic monophosphate (cGMP) accumulation, LY-83583 and methylene blue, or the antagonists of cGMP-dependent protein kinase, Rp-8-pCPT-cGMPS and Rp-8-Br-cGMPS. The concentration of NO needed to enhance fMLP-induced exocytosis was much higher than the concentration leading to an increase in intracellular cGMP levels. These observations suggest that the enhancement of exocytosis by NO is not likely to be mediated by cGMP. At the concentration which inhibited fMLP-induced exocytosis, NO reduced the intracellular level of glutathione. Since it is known that inactivation of intracellular sulfhydryl groups causes complete inhibition of the exocytotic response, it seems evident that the very strong inhibition of exocytosis by high NO concentrations is due to the reaction of NO with glutathione or with other sulfhydryl group-containing targets.
Collapse
Affiliation(s)
- B E VanUffelen
- Department of Medical Biochemistry, Leiden University, The Netherlands
| | | | | |
Collapse
|
4
|
Elferink JG, Deierkauf M. Protamine sulfate-induced enzyme secretion from rabbit neutrophils. Inflammation 1986; 10:413-23. [PMID: 3098680 DOI: 10.1007/bf00915825] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Protamine sulfate induces enzyme secretion from rabbit neutrophils. Enzyme secretion is mainly due to exocytosis but, depending on the experimental conditions, a small amount of cytolysis may occur. As compared with stimulation of neutrophil functions by other activators, protamine sulfate-induced enzyme release by exocytosis is a relatively slow process and is not accompanied by a marked activation of the metabolic burst. For optimal exocytosis, extracellular Ca2+ is required, but there is still some enzyme release in its absence, and other metal ions (Sr2+, Ba2+, Mg2+) can partly mimic the effect of Ca2+. Positive charges on protamine are of primary importance because the polyanion heparin completely inhibits protamine sulfate-induced enzyme release. Protamine linked to agarose beads is able to induce enzyme release; thus the induction of exocytosis is due to an interaction of the positive charges on protamine with the plasma membrane. Sialic acid residues on the membrane, however, seem not to play an important role in this process.
Collapse
|
5
|
Elferink JG, Deierkauf M, Van Steveninck J. Toxicity of organotin compounds for polymorphonuclear leukocytes: the effect on phagocytosis and exocytosis. Biochem Pharmacol 1986; 35:3727-32. [PMID: 3778501 DOI: 10.1016/0006-2952(86)90657-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Phagocytosis and concomitant release of enzymes by rabbit polymorphonuclear leukocytes (PMNs) are inhibited by micromolar concentrations of triphenyltin and tributyltin; inhibition by triethyltin occurs at higher concentrations. Chemotactic peptide-induced exocytosis is inhibited at the same concentrations as phagocytosis. Tributyltin causes cell lysis at slightly higher concentrations as required for inhibition of phagocytosis and exocytosis. The organotin compounds have little effect on ATP level in PMNs, which makes an effect on metabolic energy providing processes unlikely. The increase of Ca2+-permeability of the plasma membrane, induced by chemotactic peptide, is inhibited by the organotin compounds. Inhibition of exocytosis by triphenyltin can be counteracted by a number of sulfhydryl compounds. The results suggest that the organotin compounds interfere with PMN function in an early phase of cell activation, where all functions have a common pathway, and where vulnerable sulfhydryl groups play a pivotal role.
Collapse
|